JP2012161284A - Threshing device - Google Patents

Abstract

An object of the present invention is to stabilize a biasing force of a spring at an initial opening when a dust feeding guide retreats and rotates against a biasing force of a torsion coil spring by a load received from a processing object in a handling chamber.
One end of a spring (32) is locked (33) to arm plates (29, 30) integral with a dust feed guide (21), and the other end is locked (35) to a regulating plate (31). When the lower limit stopper 39 is moved by the operation lever 47 or the like, the arm plate 29 is rotated through one end of the long hole 40 and the regulation plate 31 is rotated, so that the initial opening position of the dust feeding guide 21 is set. Even if it exists, the urging force of the spring 32 is kept constant.
[Selection] Figure 7

Description

  The present invention relates to a threshing device used for a combine, a harvester, or the like, and more particularly, to a dust feeding guide that is provided on the inner surface side of a handling chamber and that guides the workpiece flowing in the handling chamber and adjusts the feeding of the workpiece.

  2. Description of the Related Art Conventionally, there is known a threshing device provided with a dust feeding guide on the inner surface side of a handling chamber to adjust the feed of the treated product by contacting the treated product flowing in the handling chamber. The dust feed guide is configured such that the coil portion of the torsion coil spring is supported on the rotation center axis of the dust feed guide, one end of the coil spring is fixed to the fixed portion, and the other end of the coil spring is implanted in the dust feed guide. The dust feed guide is urged by being hooked on the pin (see Patent Document 1).

  The dust feed guide is rotated according to the load caused by the contact of the workpiece with the rotation of the cylinder, with the free length (natural) state of the coil spring set to the initial opening, and the workpiece feed (speed) ) Is adjusted automatically.

JP 2009-95259 A

  The dust feed guide can adjust the initial opening degree determined by the position of the other end of the coil spring by adjusting the position of the fixing portion that fixes one end of the coil spring. Therefore, the initial opening position of the dust feed guide is not stable due to variations in processing of the coil spring.

  In particular, in the case where a plurality of dust feed guides are arranged in parallel in the handling chamber, it is necessary to adjust the position of the fixed part to each dust feed guide to match the initial opening position. Adjustment of the opening position was troublesome.

  Therefore, the present invention provides a threshing device that maintains the biasing force of the dust feed guide by the spring in a fixed relationship regardless of the initial opening position of the dust feed guide, thereby eliminating the above-described problems. It is the purpose.

In the present invention, a dust feed guide (21) is provided in the handling chamber (12) so as to be rotatable about a rotation fulcrum shaft (25) and biased in one direction by a spring (32). In the threshing device in which the dust guide (21) is rotated and retracted against the urging force of the spring (32) by the load received from the processing object in the chamber (12),
The rotation fulcrum shaft (25) is provided with arm plates (29, 30) so as not to rotate relative to each other, and supports the regulation plate (31) so as to be relatively rotatable,
One end (32b) of the spring is locked to the arm plate (30, 33), and the other end (32c) is locked to the restriction plate (31, 35),
The lower limit stopper (39) (31a) that can set the initial opening of the dust feed guide (21) is provided in the restriction plate (31), and the biasing direction of the spring (32) is applied to the arm plate (29). The initial opening position of the dust feed guide (21) is changed via the arm plates (29, 30) and the restriction plate (31) by the movement of the lower limit stoppers (39), (31a). To be
It is in the threshing apparatus characterized by this.

For example, referring to FIGS. 4 to 8, a plurality of the dust feeding guides (21...) Are arranged in the handling chamber (12) in the axial direction of the handling cylinder (11).
Each dust feed guide (21) is provided with the arm plate (29, 30) and the restriction plate (31), respectively.
A plurality of the lower limit stoppers (39...) Are provided so as to be rotatably inserted into the regulation plate, and a plurality of the lower limit stoppers (39) are arranged on the connection plate (37) so as to be in contact with the arm plates, respectively.
By the movement of the connecting plate (37), the initial opening position of each of the dust feeding guides (21 ...) is changed.

  For example, referring to FIGS. 9 to 12, the lower limit stopper (31a) is formed integrally with the restriction plate (31), and an operation member (56) for setting the initial opening degree is arranged.

  In addition, although the code | symbol in the said parenthesis is for contrast with drawing, it does not have any influence on description of a claim by this.

  According to the present invention according to claim 1, since the initial opening position of the dust feed guide is changed via the arm plate and the regulation plate by the movement of the lower limit stopper, no matter what position the initial opening position is, The springs due to the relationship between the arm plate and the regulating plate are in the same urging state, and the relationship of the urging force to the load of the dust feed guide at the initial opening position is kept constant regardless of the processing variation of the spring, etc. The dust feed guide can be automatically adjusted according to the conditions, which stabilizes the threshing load regardless of the initial opening position, reduces the required power, and improves the energy saving effect. be able to.

  According to the second aspect of the present invention, a plurality of dust feeding guides are arranged in parallel, and the processing object in the handling chamber by the dust feeding guide can be stably fed with high efficiency. The dust opening guide can set the initial opening position at the same time by each lower limit stopper provided on the connecting plate, the initial opening position of the dust feeding guide can be easily and accurately performed, and workability is improved. Can do.

  According to the third aspect of the present invention, since the lower limit stopper is integrally formed on the restriction plate and the operation member such as the knob bolt is arranged, the initial opening degree can be set for each dust feeding guide with the operation member. it can.

The top view which shows the combine to which this invention is applied. The schematic side view which shows the threshing apparatus. The front view. The top view which shows the dust feeding guide part which concerns on this invention. Sectional drawing of the rotation spindle part of the dust feeding guide. The perspective view which shows the operation lever. The top view which shows the different state of a dust feeding guide. 7A and 7B are views showing different attachment states of the L-shaped lever (41). The perspective view which shows the dust feeding guide by other embodiment. The plan view. The top view of the state which removed the cover. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the combine 1 includes a traveling machine body 3 supported by a crawler, and a pre-processing unit 5 is disposed in front of the traveling machine body 3 so as to be movable up and down. In the traveling machine body 3, a driving operation unit 6 and an engine are arranged on one side, a grain tank 7 and a discharge auger 9 for discharging the grains in the grain tank are arranged behind the traveling machine body 3, and a threshing device 10 is arranged on the other side. Is arranged.

  As shown in FIGS. 2 and 3, the threshing device 10 includes a threshing unit 10 a and a sorting unit 10 b. The threshing unit 10 a includes a handling chamber 12 having a handling cylinder 11 and is sandwiched between feed chains 13. The grain is threshed from the cereals conveyed. The sorting unit 10b separates the grains and impurities that have fallen from the threshing unit 10a through the receiving net 15 into the first port 16, the second port 17, and the dust outlet 19 by swinging sorting and wind sorting. The grain of the port 16 is transferred to the Glen tank 7, and the one of the port 17 is conveyed to the processing chamber 20 of the threshing unit 10a and re-selected after reprocessing. Contaminants such as spikes are discharged out of the machine.

  A plurality of (for example, four) dust feed guides 21 are arranged in the axial direction of the handling cylinder 11 above the handling cylinder 11 in the handling chamber 12. The handling cylinder 11 has a large number of teeth 11a planted around the drum shape, and the rotation of the handling cylinder 11 in the direction of the arrow B causes grains and straw scraps threshed by the handling teeth 11a. As shown in the direction of arrow C, the processed material made of impurities is transferred spirally from the front toward the rear while being rotated along with the rotation of the handling cylinder 11. The flow of the processed material in the handling chamber 12 is controlled by the direction of the dust feeding guide 21 attached to the upper wall (threshing cover) 22 of the handling chamber 12, and the dust feeding guide 21 itself is The direction is automatically adjusted according to the load received from the workpiece.

  Next, the dust feed guide 21 which is a main part of the present invention will be described in detail with reference to FIGS. Each (four) dust feeding guides 21 are integrally provided with a pivot fulcrum shaft 25 at an intermediate portion thereof, and the fulcrum shaft 25 is attached to the threshing cover 22 as shown in FIG. The bearing 26 is rotatably supported and extends through the cover 22 to the outside of the handling chamber 12. The fulcrum shaft 25 has a two-chamfered portion at the upper projecting portion, and a boss portion 27 is non-rotatably fitted to the two-chamfered portion. A first arm plate 29 and a second arm plate 30 are non-rotatably fitted to the boss portion 27, and a restriction plate 31 is rotatable on the bulging cylindrical portion 27 a at the lower end of the boss portion 21. It is mated. Accordingly, the first and second arm plates 29 and 30 are connected so as to rotate integrally with the dust feed guide 21 via the fulcrum shaft 25, and the first arm plate 29 is connected to the dust feed guide 21. The second arm plate 30 is a relatively short plate that extends in a direction orthogonal to the first arm plate 29. The restricting plate 31 is supported by the fulcrum shaft 25 so as to be rotatable, and the base end on the fulcrum shaft 25 side is wide with the first arm plate 29 wide in the opposite direction to the second arm plate 30. Consists of a triangular plate that is upside down and extends in the same direction below the first arm plate 29.

  A coil portion 32 a of a torsion coil spring 32 is fitted into the fulcrum shaft 25, and one end arm portion 32 b of the coil spring 32 is hooked on a pin 33 implanted at the tip of the second arm plate 30, The other end arm portion 32 c is hooked on a pin 35 fixed to the triangular wide side of the restriction plate 31. In the torsion coil spring 32, both end arm portions 32b and 32c are respectively hooked on pins 33 and 35 in a state where the coil portion 32a is wound by a predetermined amount, and in FIG. The first and second arm plates 29 and 30 are biased so as to rotate in the clockwise direction and the regulating plate 31 in the counterclockwise direction.

  A connecting plate 37 is arranged across the first arm plates 29 and the tip portions of the regulating plates 31 in the four dust feeding guides 21 arranged in parallel. As shown in FIG. 8, back stop shafts (lower limit stoppers) 39 are respectively planted on the connecting plate 37 where the first arm plates 29 and the regulation plates 31 are located. . The back stop shafts 39 are rotatably fitted to the tip portions of the regulation plates 31. Accordingly, the four regulation plates 31 are coupled to the coupling plates 37 at the tips, and are connected to the parallel links. Is configured. An arc-shaped long hole 40... Around the fulcrum shaft 25 is formed in the wide end portion of each first arm plate 29, and the backstop shaft 39 is fitted into the long hole 40. Accordingly, the torsion coil spring 32 urges the backstop shaft 39 to contact the left end (40a) of the long hole 40 of the first arm plate 29 as shown in FIG.

  As shown in FIG. 8, the back stop shaft 39 is secured to the upper side of the first arm plate 29 by a nut 42 via a plate 41 having an L-shaped cross section. Usually, as shown in FIG. 8A, the rising surface 41a is attached so as to face upward, so that the free movement of the arm plate 29 and the regulating plate 31 is not hindered. An upper limit stopper 43 made of an L-shaped plate is fixed to the threshing cover 22 at a predetermined position on the front side of each first arm plate 29.

  As shown in FIGS. 4 and 6, a bell crank-shaped lever 46 is rotatably disposed on the threshing cover 22 at the front end portion of the connection plate 37. One end of the lever 46 and the connection plate The front end of 37 is connected via a short slot and a pin fitted therein. At the other end of the lever 46, an initial opening setting operation lever 47 made of a plate spring that is bent in the vertical direction is fixed integrally with a bolt, and the operation lever 47 is moved forward so that the operator can operate it. It extends to. A locking plate 49 having a large number of locking grooves 49a is arranged so as to be fixed to the threshing cover 22 so as to cross the lower side of the setting lever, and the setting lever 47 is a locking provided on the lower surface thereof. The piece 47a is engaged with and disengaged from the locking groove 49a of the locking plate 49 and is held at a predetermined operation position.

  Since this Embodiment consists of the above structures, in the state where the handling cylinder 11 of the threshing apparatus 10 is rotating in the direction of arrow B based on the operation of the combine 1, the processed material in the handling chamber 12 is While being rotated by the handling cylinder 11, it is transferred from the front to the rear in a spiral shape while rotating. At this time, the feed (speed) of the processed material is adjusted by the inclination of the four dust feed guides 21. The dust feed guide 21 has its initial opening position set by the operator operating the initial opening setting operating lever 47. That is, the front / rear position of the connecting plate 37 is set via the lever 46 by the operation position of the operation lever 47, and the position of each back stopper shaft (lower limit stopper) 39 is set.

  Accordingly, the rotational position of the first arm plate 29 is set based on the position of the front end (lower limit side, closing side) of the long hole 40 that is in contact with the back stopper shaft 39 by the biasing force of the torsion coil spring 32. Then, an initial opening position that is an inclination angle of the dust feeding guide 21 integrated with the arm plate is set. At this time, the restriction plate 31 connected to the backstop shaft 39 is also rotated by the same amount as the first arm link 29, and accordingly, the pin 33 implanted in the arm link 30 and the pin implanted in the restriction plate 31. The urging force of the torsion coil spring 32 that is hooked between and the same rotation fulcrum shaft 25 is always kept constant regardless of the initial opening position.

  In FIG. 4, when the initial opening setting lever 47 is operated to the open side, the initial opening position of the dust feed guide 21 is adjusted to the open side, and when the setting lever 47 is operated to the close side, the dust feed guide 21 is closed. Adjusted to the side. When the dust feed guide 21 is on the open side, the transfer speed from the front to the back of the processed object is increased, and when the dust supply guide 21 is on the closed side, the transfer speed of the processed object is decreased. The time (threshing time) of the processed material accumulated inside becomes longer. Due to the spiral movement (arrow C in FIG. 2) of the processed material accompanying the rotation of the handling cylinder 11, the dust feeding guide 21 is pressed from the processed material in the direction of arrow D (see FIGS. 4 and 7) (load). When the amount of processed material in the handling chamber 12 is large, the load increases.

  The dust feed guide 21 has a biasing force of a torsion coil spring 32 between a pin 35 whose rotational position is fixed by a back stopper shaft 39 and a pin 33 provided on an arm link 30 integrated with the dust feed guide 21. Is acting, and the biasing force and the load D are kept in balance. As shown in the dust feed guide 21 on the front side of FIG. 7, when the load (pressing force) from the processed material acting on the dust feed guide 21 is larger than the urging force of the coil spring 32, the dust feed guide 21 is integrated with it. It rotates in the direction of arrow E around the rotation fulcrum shaft 25 together with the arm plates 29 and 30. The retraction rotation (arrow E) of the dust feed guide 21 is such that the second arm plate 30 rotates in the direction of arrow E against the coil spring 32, and the first arm plate 29 moves within the elongated hole 40. It rotates in the direction of arrow E while moving relative to the back stopper shaft 39.

  As a result, when a large amount of processed material accumulates in the handling chamber 12 and the load from the processed material acting on the dust feed guide 21 is large, the dust feed guide 21 automatically retreats and rotates, thereby increasing the feed speed of the processed material. By increasing the speed, the amount of processed material in the handling chamber 12 is reduced to reduce the load, and equilibrates at a predetermined appropriate position.

  The retraction rotation of the dust feed guide 21, that is, the limit angle in the opening direction, is preferably at a predetermined position regardless of the initial opening position. Therefore, when the first arm plate 29 rotates by a predetermined amount in the direction of arrow E, the first arm plate 29 comes into contact with the upper limit stopper 43 fixed to the threshing cover. When the first arm plate 29 comes into contact with the upper limit stopper 43, the dust feed guide 21 does not rotate further in the retracting direction even if the load D is large. The dust feeding guide 21 can be prevented from hunting in contact with, and the direction of the dust feeding guide 21 can be stabilized to improve the threshing performance. Since the upper limit stopper 43 is always at a predetermined position and is not set by the length of the long hole 40 (the other end 40b) related to the initial opening setting position, the opening direction angle of the dust feed guide 21 is Stabilize.

  The closing position (initial opening position) of the dust feed guide 21 is set at one end 40a of the long hole 40 of the first arm plate 29. This is the direction of the arrow F of the arm plate 29 (FIG. 4). ) May be restricted, and may be a recess cut in place of the long hole 40. The other end 40b of the long hole 40 is not necessarily required, and the back stopper shaft 39 is rotated in the direction of arrow F. It is sufficient if a stopper for regulating (contacting) is formed on the arm plate 29. Further, the initial opening is set by manually operating the initial opening setting operation lever 47, but the operator operates the electric actuator or electric motor that moves the connecting plate 37 instead of the operation lever. It may be possible to perform remote control from the unit.

  In FIG. 8B, the L-shaped plate 42 fitted on the back stopper shaft 39 and disposed above the first arm plate 29 is reversed, that is, the rising portion 41a of the L-shaped plate 42 faces downward. Indicates the state of replacement. In this state, the rising portion 41a of the L-shaped plate 41 abuts against the side end surface of the first arm plate 29, and the relative movement between the first arm plate 29 and the back stopper shaft 39 is prohibited and moves integrally. Is regulated. Accordingly, the first arm plate 29 is directly rotated by the connecting plate 37 in the same manner as the regulating plate 31, and the automatic response due to the balance between the coil spring 32 and the load D is stopped, and the dust feed guide 21 has the initial opening degree. The setting lever 47 is forcibly set to a predetermined position.

  The movement of the connecting plate 37 and the back stopper shaft 39 by the setting lever 47 pushes one end 40a of the long hole 40 to rotate the arm plate 29, and sets the initial opening position of the dust feed guide 21. At this time, the restricting plate 31 is also rotated through the back stopper shaft 39 in the same manner as the arm plate 29, and the relationship between the pins 33 and 35 of the coil spring 32 is the same. However, the urging force of the coil spring 21 against the dust feed guide 21 does not change and is always constant. Therefore, for example, when the initial opening degree setting lever 47 is adjusted to the open side by increasing the running speed and increasing the supply amount of the culm to the threshing device 10 during cutting, the initial opening degree of the dust feed guide 21 is adjusted. The position moves to the open side. At this time, the restriction plate 31 is moved by the same amount together with the arm plate 29 integrated with the dust feed guide 21, and both pins 32 and 35 hooking the coil spring 32 are also moved by the same amount, so that the biasing force of the coil spring 32 is adjusted. Same as before. Therefore, when the load on the dust feed guide 21 increases due to an increase in the amount of processed material in the handling chamber 12 with the initial position adjusted to the open position as a reference, the dust feed guide 21 is resisted against the biasing force of the coil spring 32. The revolving rotation can be carried out to allow the processed material to flow backward, and the increase in the threshing load can be suppressed and the required power can be reduced.

  Further, the plurality of (for example, four) dust supply guides 21 arranged in parallel can adjust the initial opening position all at once via the connecting plate 37 by operating one operating means such as the setting lever 47. Workability is improved. Further, the initial opening degree of the plurality of dust feed guides can be adjusted all at once by operating the operation lever 47, and the individual dust feed guides are independently retracted and rotated according to the situation in the handling chamber.

  Since the upper limit (opening side) stopper 43 is disposed on the threshing cover 22 for each dust feeding guide 21..., The opening on the upper limit side of each dust feeding guide 21 is regulated regardless of the initial opening position. Therefore, it is possible to prevent the grain loss from being increased by preventing it from being discharged to the outside without being processed in the handling room.

  Since the L-shaped plate 42 is interposed on the back stopper shaft 39, the rising portion 42a of the L-shaped plate 42 is directed upward to allow the arm plate 29 to move freely, and to the dust feeding guide 21 described above. By revolving according to the load, it is possible to save energy by suppressing an increase in the threshing load, and by changing the L-shaped plate 42 so that the rising portion 42a faces downward, the arm plate 29 is moved back. As the stopper shaft 39 moves, the dust feeding guide 21 can be fixed at a predetermined position corresponding to the setting lever 47 by moving integrally with the regulating plate 31. In the fixed (regulated) state, the dust feeding guide 21 does not retract and rotate even when it is pushed by the processing object. In the present embodiment, the L-shaped plate 42 is attached to the arm plate 29 of each dust feed guide 21, but the single regulating member (L-shaped plate) is pulled back and forth as an integral part. By repeating the operation, all of the plurality of dust feeding guides 21 can be switched to the above-described retreat rotation permission state and retreat rotation restriction state.

  In addition, although the above-mentioned embodiment demonstrated what provided the four dust-feeding guides in parallel, this may be a plurality other than four or one dust-feeding guide. Further, the initial opening position of the dust feed guide is set by direct manual operation with the initial opening setting operation lever 47, but this may be performed remotely using an actuator such as an electric motor or a hydraulic motor. Furthermore, automatic control may be performed by the amount of processed material supplied to the threshing device, the rotational speed of the barrel, a vehicle speed sensor, and the like.

  Next, a dust feed guide according to another embodiment will be described with reference to FIGS. The present embodiment includes a dust feed guide unit 51 having a single dust feed guide 21. In the small combine, only one dust feeding guide unit 51 may be used, or a plurality of units 51 may be used in series.

  The dust feed guide unit 51 includes a dust feed guide 21 disposed in the handling chamber 12 and a cover body 52 fixedly disposed outside the threshing cover 22. A rotation fulcrum shaft 25 protrudes from the dust feed guide 21 through the bearing 26 arranged in the threshing cover 22 in the cover body 52, and a boss portion 27 is formed on the rotation fulcrum shaft 25 by a two-chamfered portion or the like. It is fitted so that it cannot rotate. A retaining bolt 53 is screwed to the upper end of the boss portion 27, and the bolt 53 has a cylindrical portion 53a at the upper portion thereof. An arm plate 30 is non-rotatably fitted to the boss portion 27, and a regulation plate (stopper plate) 31 is rotatably fitted to the cylindrical portion 53a. A pin 33 is planted upward at the tip of the arm plate 30, and a pin 35 is planted downward on the regulation plate 31.

  Therefore, the dust feed guide 21 and the arm plate 30 rotate together via the rotation fulcrum shaft 25 and the boss portion 27. The restriction plate 31 and the pin 35 are rotatable with respect to the rotation fulcrum shaft 25, and are relatively rotatable with the dust feed guide 21 and the arm plate 30. A coil portion 32 a of a torsion coil spring 32 is fitted into the boss portion 27, one end arm portion 32 b of the coil spring 32 is locked to the pin 33, and the other end arm portion 32 c is locked to the pin 35. ing. A collar 55 is rotatably supported by the pin 33, and the restricting plate 31 has a triangular shape. One end 31a of the restricting plate 31 abuts the collar 55 in the urging direction of the coil spring 32. The lower limit stopper is configured, a knob bolt (operation member) 56 is disposed at the other end tip portion 31b, and the pin 35 is implanted at the other tip portion 31c.

  The cover body 52 is integrally fixed to brackets 57, 57 fixed to the threshing cover 22 by mounting bolts 58, 58, and has a box shape. The coil spring 32, the arm plate 30 and the restriction are placed in the box. A plate 31 and the like are stored. In the top plate 52a of the cover body 52, arc-shaped long holes 59, 63 centering on the fulcrum shaft 25 are formed at positions opposite to the rotation fulcrum shaft 25 (cylindrical portion 53a). The knob bolt 56 is guided in one long hole 59 so as to be adjustable and fixed at a predetermined position, and the cap 33a attached to the tip of the pin 33 projects into the other long hole 60, The position is visible.

  Similarly, in the present embodiment, by operating the knob bolt 56 that sets the initial opening position, the regulating plate 31 rotates around the rotation fulcrum shaft 25, thereby the tip portion serving as the lower limit stopper 31a changes the contact position with the collar 55, and the arm plate 30 integrated therewith sets the initial opening position of the dust feed guide 21 via the rotation fulcrum shaft 25. At this time, the position of the pin 35 provided on the restriction plate 31 is also rotated, and the biasing force of the torsion coil spring 32 hooked between the pin 35 and the pin 33 of the arm plate 30 is the initial force. Regardless of the change of the opening position, it is always kept constant.

  In addition, when a load from the workpiece acts on the dust feed guide 21 at the set initial opening position of the dust feed guide, the dust feed guide 21 resists the biasing force of the coil spring 32 as shown in FIG. By rotating (retracting) as shown by the one-dot chain line, the feeding speed of the processed material is increased, the amount of processed material in the handling chamber 12 is decreased, and the load is reduced. The initial opening position by adjusting the knob bolt 56 can be confirmed by the operator by visually observing the position of the long hole 59 from above the cover body 52, and the retreat position of the dust feed guide 21 by the processed material is the cap 33a. This can be confirmed by visually observing the position of the long hole 63.

  In the above-described embodiment, the dust feed guide is balanced with a torsion coil spring with respect to the load from the workpiece, but this is not limited to the torsion coil spring, and other springs such as a tension spring are used. May be.

DESCRIPTION OF SYMBOLS 10 Threshing apparatus 11 Handling cylinder 12 Handling chamber 21 Dust feed guide 25 Rotation fulcrum shaft 29 (1st) Arm plate 30 (2nd) Arm plate 31 Restriction plate 32 (Torsion coil) Spring 32a Coil part 32b One end (arm) Part)
32c The other end (arm part)
33, 35 Pin 37 Connecting plate 39, 31a Lower limit stopper (back stop shaft, tip of regulating plate)
40 long hole 40a, 55 contact part (one end, collar)
47, 56 Operation members (operating lever, knob bolt)

Claims (3)

A dust-feeding guide is provided in the handling chamber so as to be rotatable about a pivoting fulcrum shaft and urged in one direction by a spring, and the dust-feeding guide is loaded by the load received from the processed material in the handling chamber. In the threshing device that is retracted and rotated against the urging force,
An arm plate is provided on the rotation fulcrum shaft so as not to be relatively rotatable, and a restriction plate is supported so as to be relatively rotatable.
While locking one end of the spring to the arm plate, the other end is locked to the restriction plate,
A lower limit stopper capable of setting an initial opening of the dust feed guide is provided on the restriction plate, abuts against the arm plate in a biasing direction of the spring, and the arm plate and the restriction are moved by the movement of the lower limit stopper. The initial opening position of the dust feed guide is changed through a plate,
Threshing apparatus characterized by the above. In the handling chamber, a plurality of the dust feeding guides are arranged in parallel in the axial direction of the handling cylinder,
Each of the dust feed guides is provided with the arm plate and the restriction plate,
A plurality of the lower limit stoppers are rotatably fitted to the restriction plate, and a plurality of the lower limit stoppers are arranged so as to be able to abut each arm plate on the connection plate,
By the movement of the connecting plate, the initial opening position of each dust feeding guide is changed,
The threshing device according to claim 1. The restriction plate is integrally formed with the lower limit stopper, and an operation member for setting the initial opening degree is disposed.
The threshing device according to claim 1.

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