JP2013094075A - Threshing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a threshing apparatus by which the treating ability of a waste dust-treating chamber is improved and the maintenance of a waste dust-treating teeth can be carried out easily.SOLUTION: The threshing apparatus is provided with the many rod-shaped waste dust-treating teeth (71a) so as to be protruded from the outer periphery of a waste dust-treating cylinder (71) pivotally supported by the waste dust-treating chamber (80), and a plate-shaped sending guide (81) in the inside of a waste dust-treating cylinder frame (72) surrounding the waste dust-treating cylinder (71), and the waste dust-sending guide (81) is tilted to the site of the waste dust-treating cylinder (71) at the downstream side in the rotation direction so as to be positioned at the rear side based on the site of the waste dust-treating cylinder (71) at the upstream side in the rotation direction. A supporting plate for attaching the waste dust-treating teeth (71a) to the outer periphery of the waste dust-treating cylinder (71) is divided to a front-side supporting plate (71b) installed in the outer periphery at the front part of the waste dust-treating cylinder (71) and a rear-side supporting plate (71d) installed in the outer periphery at the rear part of the waste dust-treating cylinder (71), and the front-side supporting plate (71b) and the rear-side supporting plate (71d) are constituted so as to be freely detachable from the waste dust-treating cylinder (71).

Description

  The present invention relates to a threshing device mounted on a combine or the like.

  Grains harvested by the harvesting device are inserted into the handling room of the combine threshing device by a feed chain and inserted into the handling chamber. Threshed by interaction with the net. The material to be processed (grains and sawdust) separated from the cereals passes through the handling net and is received by the swing shelf in the sorting room. Separate the second grain and sawdust and transport only the grain to the glen tank.

  The second kernel is sent to the second processing chamber, separated into grains, branch rachis, etc. by the second processing cylinder, and returned to the swing shelf again to be separated into grains, second kernel, sawdust, etc. . Short items such as sawdust generated in the handling chamber are transported to the dust disposal chamber and processed by the dust disposal cylinder. The remaining threshed cereals that have reached the end of the threshing device's handling chamber are kept in a long length after being transported by the scouring and transporting device and put into the slaughtering treatment chamber at the rear of the threshing device. To be released.

  And in the following patent document 1, a spiral processing tooth comprising a spiral body continuous to the outer periphery of the dust removal processing cylinder and a processing tooth attached to the outer peripheral edge of the spiral body is attached, and the left half circumference of the dust removal processing cylinder is surrounded. Thus, a dust removal treatment chamber provided with a lattice-like dust collection screen 27 is described.

JP 2010-124783 A

  The dust removal treatment cylinder of the dust removal treatment chamber described in Patent Document 1 has a structure in which helical treatment teeth are integrally attached, and has a small striking action on the treatment object, so that the treatment object on the lump is solved. There is a risk that the yield loss in which grains are released out of the machine together with the sawdust increases. Further, when the spiral processing teeth are worn, the dust removal processing cylinder must be replaced, and the replacement cost is high.

  Then, this invention makes it a subject to provide the threshing apparatus which raised dust-removing process efficiency and improved the maintainability.

The problems of the present invention are solved by the following technical means.
The invention according to claim 1 is a threshing apparatus provided with a dust removal treatment chamber (80) communicating with the rear part of the handling chamber (66), and a dust removal treatment cylinder (supported by the dust removal treatment chamber (80)). 71) A large number of rod-shaped dust disposal teeth (71a) are provided so as to protrude on the outer peripheral surface of the plate 71, and a plate-like feed is provided inside the dust disposal barrel (72) covering the periphery of the dust disposal copper (71). A guide (81) is provided, and the feed guide (81) is positioned rearward with respect to a part on the lower side in the rotational direction of the dust removal processing cylinder (71) with respect to a part on the upper side in the rotational direction of the dust removal processing cylinder (71). The threshing apparatus is characterized in that it is arranged so as to be inclined.

  According to a second aspect of the present invention, there is provided a front side provided with a support plate on the outer periphery of the front portion of the dust removal treatment cylinder (71) for attaching the dust removal treatment teeth (71a) to the outer peripheral surface of the dust removal treatment cylinder (71). The support plate (71b) and the rear support plate (71d) provided on the outer periphery of the rear portion of the dust removal processing cylinder (71) are divided into the front support plate (71b) and the rear support plate (71d). The threshing apparatus according to claim 1, wherein the threshing apparatus is configured to be detachable with respect to (71).

  According to a third aspect of the present invention, the installation interval of the dust removal treatment teeth (71a) is set at the rear part of the dust removal treatment cylinder (71) rather than the installation interval at the front part of the dust removal treatment cylinder (71). It is set as the threshing apparatus of Claim 1 or Claim 2 set so that a space | interval might become wider.

  According to a fourth aspect of the present invention, the dust disposal teeth (71a) are erected with a receding angle with respect to the rotational direction of the dust disposal cylinder (71). 3. The threshing device described in 3.

  According to a fifth aspect of the present invention, the receding angle of the dust disposal tooth (71a) provided at the rear portion of the dust disposal cylinder (71) with respect to the rotational direction of the dust disposal cylinder (71) is set to a dust disposal cylinder ( 71. The threshing apparatus according to claim 4, wherein the threshing apparatus is set to be larger than a receding angle of the dust exhausting tooth (71a) provided at the front portion of 71).

  According to the first aspect of the present invention, the dust guide teeth (71a) give the workpiece a striking action, and the feed guide (81) feeds it toward the rear of the dust treatment chamber (80). In addition, the dust removal treatment action can be improved.

  According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, the front support plate (71b) and the rear support plate (71d) are each provided with a plurality of dust disposal teeth (71a). Since it is provided, the worn dust removal processing teeth (71a) can be replaced together. In particular, since the dust disposal teeth (71a) at the front part of the dust disposal chamber (80), which is heavily loaded by the object to be processed, can be replaced together with the front support plate (71b), maintenance can be facilitated.

  According to the third aspect of the invention, in addition to the effect of the first or second aspect of the invention, the object to be processed is unraveled at the front portion of the dust removal treatment cylinder (71), and the dust treatment cylinder is obtained. In the rear part of (71), the delivery of the object to be processed becomes smooth, and clogging in the dust disposal chamber (80) can be suppressed.

  According to the invention described in claim 4, in addition to the effects of the invention described in claim 1, 2 or 3, the object to be treated is prevented from being entangled with the dust-exhaust treatment teeth (71a), and the exhaust is prevented. Clogging in the dust processing chamber (80) can be suppressed.

  According to the fifth aspect of the invention, in addition to the effect of the fourth aspect of the invention, the clogging of the dust disposal chamber (80) due to the entanglement of the object to be treated with the dust disposal teeth (71a) is further effective. Can be suppressed.

It is a left view of the combine which performs the grain harvesting operation. It is a top view of a combine. It is side surface sectional drawing of the threshing apparatus of a combine. It is a plane sectional view of a combine threshing device. It is a perspective view of a dust removal processing chamber. It is a side view of a dust removal processing chamber. It is a sectional side view of a general purpose combine. It is a plane sectional view of the sorting room of a general purpose combine. It is an expansion perspective view of a 1st sheave. It is a plane sectional view of the sorting room of the general purpose combine of another example. It is an expansion perspective view of the 1st sheave of another example.

Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings.
FIG. 1 shows a left side view of a combine that performs the grain harvesting operation of this embodiment, FIG. 2 shows a plan view of the combine, and FIG. 3 shows an enlarged right side sectional view of the combine threshing apparatus.

In the present embodiment, the front side and the rear side in the forward direction of the combine are referred to as front and rear, respectively, and the left side and right side are referred to as left and right, respectively.
At the lower part of the traveling frame 2 of the combine 1 shown in FIGS. 1 and 2, there is a pair of left and right crawlers 4 made of a flexible material such as rubber and formed into an endless belt shape. The crawler 4 is provided with a traveling device 3 configured to be able to travel freely with a slight sink, a cutting device 6 is mounted on the front portion of the traveling frame 2, and an engine and a threshing device 15 (not shown) are installed on the upper portion of the traveling frame 2, The cockpit 20 and the Glen tank 30 are mounted.

  The reaping device 6 is configured such that the entire reaping device 6 is moved up and down by an expansion and contraction action of a reaping lifting cylinder (not shown), and the cereal vegetation vegetated on the field can be harvested at a predetermined height. The weeding tool 7 is disposed at the lower part of the front end of the reaping device 6, the cereal raising device 8 having an inclined shape behind it, and a cutting blade (not shown) at the rear bottom thereof. Between the cutting blade and the starting end of the feed chain 14 of the threshing device 15, the transfer device 9 such as a front conveyance device, a treatment depth adjusting device, and a supply conveyance device (not shown) is successively transferred and handled in the cereal. It is arranged so that it can be adjusted.

  The operation of the harvesting device 6 of the combine 1 is performed as follows. First, the engine is started and the operation levers for shifting, steering, etc. are operated so that the combine 1 moves forward, and the cutting and threshing clutch (not shown) is inserted and operated to transmit the rotating parts of the aircraft. When the traveling frame 2 is caused to travel forward, cutting and threshing operations are started. The cereals to be planted in the field are subject to weeding by the weeding tool 7 at the lower front end of the reaping device 6, and then the culm is raised and the device 8 is raised to bring it upright if it is lying down. The cereal stock reaches the cutting blade and is cut, and is scraped into the front transport device and transported backwards. Be transported.

  The cereal is disposed on the feed chain 14 from the feeding and conveying device and on the upper end side of the feed chain 14, and is inherited on the start end side between the feed chain 14 and elastically biased toward the feed chain 14 and supported by the body. And supplied to the threshing device 15. The threshing device 15 is provided with a handling chamber 66 having a handling cylinder 69 pivoted on the upper side between a front plate 56 and a rear plate 57, and a sorting chamber 50 provided integrally below the handling chamber 66. Thresh and sort the harvested cereal meal.

  As will be described in detail later, the cereal mash supplied to the threshing device 15 is inserted into a handling chamber 66 which is a main threshing portion, and a plurality of teeth 69a of a handling drum 69 which is pivoted on the handling chamber 66 and rotated. The threshing is carried out by the transfer by the feed chain 14 and the interaction with the handling net 74, and the object to be processed (grains and sawdust) is received by the swing shelf 51 of the sorting chamber 50 in the threshing device 15, up and down, front and rear direction While moving on the swinging shelf 51 swinging to the wind, the wind is selected by receiving air from the tang 79, and the grains with heavy specific gravity pass through the sheaves 53 and 54 and the selection net 63, and from the first spiral 65, It is conveyed to the Glen tank 30 via the first cereal cylinder 73 (FIG. 4) incorporating the conveying spiral and temporarily stored. On the shaft axis in the longitudinal direction of the first cereal cylinder 73, the straw outlet of the Glen tank 30 is provided.

  The remaining threshed cocoons that have reached the end of the handling chamber 66 of the threshing device 15 and are kept in a long length are sandwiched by the feed chain 14 and conveyed to the slaughtering treatment chamber 82 at the rear of the threshing device 15. It is thrown in and released to the field. A waste cutter is provided in the waste treatment chamber 82, and the cereals cut by the waste cutter are discharged to the field.

  A grain tank spiral (not shown) for transferring grains is provided at the bottom of the grain tank 30, and a discharge auger composed of a vertical auger 18 and a horizontal auger 19 is connected to a spiral drive shaft that drives the grain tank spiral. The grain stored in 30 is discharged from the discharge auger outlet to the outside of the combine 1.

  The grain husks harvested by the reaping device 6 are adjusted in the handling depth by the cereal conveyance and adjusting device attached to the reaping device 6 and inserted into the handling chamber 66 which is the main threshing portion of the threshing device 15. A handling drum 69 pivoted in the handling chamber 66 has a large number of teeth 69a provided on the surface thereof, and rotates in the direction of arrow W in FIG. 4 by power from the engine by a driving mechanism (not shown). Grains with grains inserted in the handling chamber 66 are transferred in the direction of arrow A in FIG. 4 by the moving feed chain 14, while handling teeth 69 a and handling nets 74 of the handling drum 69 rotating in the direction of arrow W. Is threshed by the interaction. The object to be processed (grains and sawdust) separated from the cereals passes through the handling net 74 and is received by the swing shelf 51.

  The swing shelf 51 includes a transfer shelf 52 arranged below the handling net 74 of the handling chamber 66, an upper first chaff sheave 53 and a second chaff sheave 54 arranged behind it, and a sorting net 63 below and a rearmost end. It is comprised from the stroller 62 etc. which were arrange | positioned.

  The first chaff sheave 53 and the second chaff sheave 54 are common in that the workpiece is leaked from between the sheaves while swinging and the wind is selected by blowing air from the tang 79, but the conveying direction of the workpiece The first chaff sheave 53 on the front side is smaller in size than the second chaff sheave 54 on the rear side, and the distance between the sheaves is somewhat narrow. On the front side in the transport direction of the workpiece, the single grain content in the workpiece is high, so that only the single grain is leaked while suppressing the leakage of the sawdust, and the sawdust is transferred to the rear. Such a configuration is adopted.

  Further, a diffusion guide 83 for diffusing the object to be processed on the swing shelf 51 is positioned above the first chaff sheave 53, and the front end of the diffusion guide 88 is positioned above the transfer shelf 52 in the conveyance direction of the object to be processed. It is provided to do.

  The transfer shelf 52 includes a plurality of rack-shaped sorting plates 52 a, and the transfer shelf 52 is disposed in front of the first chaff sheave 53. The transfer shelf 52 is arranged below the handling cylinder 69 and can receive the second processed material.

  The grain shed in the early stage of threshing that leaks in the area in front of the handling net 74 (FIG. 3) is a single grain and does not contain impurities, so it is necessary to roughly sort on the first chaff sheave 53 and the second chaff sheave 54. In addition, it is possible to perform wind selection with the direct selection net 63 by blowing air from the tang 79, which will be described later, and the load on the chaff sheaves 53 and 54 is reduced, and efficient threshing becomes possible.

  Further, since the swing shelf 51 swings in the up / down and front / rear direction by the operation of the swing shelf drive mechanism (not shown), the object to be processed leaks onto the swing shelf 51 while moving in the arrow D direction (FIG. 3). The grain having a high specific gravity passes through the sorting net 63 in the direction of arrow E, is accumulated on the first shelf 64, and is conveyed from the first spiral 65 to the grain tank 30 via the first lifting cylinder 73. The grains stored in the grain tank 30 are conveyed to the outside of the combine 1 via the vertical auger 18 and the horizontal auger 19.

  Among the objects to be processed on the swing shelf 51, lightweight ones are blown away by the swinging action of the swing shelf 51 and the air blown by the fan 79 a of the Karatsu 79, and the first chaff sheave 53 and the second chaff sheave from the swing shelf 51. The second grain having a small size moves in the direction of arrow D toward 54 and leaks in the direction of arrow G on the Strollac 62 and is collected on the second shelf board 85. It is conveyed to a blasting cylinder (not shown).

  The second kernel (sometimes called the second product) is a mixture of normal kernels, branch kernels, sawdust, etc., and the second lifting cylinder spiral (not shown) ) And discharged from the second processing chamber entrance to the second processing chamber 67.

  The second processing cylinder 70 pivoted on the second processing chamber 67 rotates in the direction of arrow J in FIG. 4 by a drive mechanism that transmits power from the engine. The second kernel is separated from the second kernel and the branch of the branch incision while traveling in the direction of arrow I (FIG. 4) while colliding with a number of processing teeth 70a planted in the second processing cylinder 70. A part of the object to be processed passes through a second processing network (not shown) provided below the second processing cylinder 70 and leaks into the sorting chamber 50, and most of the object to be processed is transferred. The shelves 52 are fed in the direction of the first chaff sheave 53 and the second chaff sheave 54, and the grain passes through the first chaff sheave 53, the second chaff sheave 54, and the sorting net 63 and is collected in the first spiral 65.

In this way, the second product is collected on the transfer shelf 52 and reprocessed by the first chaff sheave 53 and the second chaff sheave 54, so that the separation between the grain and the sawdust is improved.
The threshing cereals that have been threshed in the object to be processed that have traveled in the direction of arrow A in FIG. 4 and have reached the end of the handling room 66 are in the direction of arrow A1 shown in FIG. It is transported and put into the waste disposal chamber 82.

  In addition, among the objects to be processed that have reached the end of the processing object conveyance direction end by the handling cylinder 69 of the handling chamber 66, short objects such as sawdust are transported by the handling cylinder 69 of the handling chamber 66. The terminal portion is introduced in the direction of arrow A2 (FIG. 4) from the communication port 75 that communicates the end portion of the dust collection chamber 68 with the dust collection cylinder 71 of the dust collection chamber 68 in the conveying direction of the workpiece, and is taken in from the handling chamber 66. The rod-shaped dust removal processing teeth 71a are made favorable to enter the dust collection processing chamber 68, and in the dust collection processing chamber 68, the dust collection processing teeth 71a of the rotating dust collection processing cylinder 71 and the dust processing chamber frame 72 from above. Processing is carried out while being conveyed in the direction of arrow K (FIG. 3) by a plate-like feed guide 81 that is erected in the feed direction toward the bottom.

The dust removal processing cylinder 71 is formed integrally with the second processing cylinder 70, and the rotation direction is the same as that of the second processing cylinder 70.
The dust removal processing teeth 71a reduce feeding resistance by being arranged at regular intervals in the circumferential direction and with narrower upper hands and lower lower spaces in the conveying direction. The dust removal processing teeth 71a are integrated with a support plate (front support plate 71b, rear support plate 71d) divided into front and rear by welding or the like. It is fastened to the outer peripheral surface of the dust removal processing cylinder 71. Therefore, it is possible to replace only the front support plate 71b that is easily worn by the dust disposal load, or to replace the front support plate 71b and the rear support plate 71d with each other, and maintenance is easy.

  In addition, the structure which arrange | positions the thing of the space | interval with the circumferential direction equal interval of the space | interval with a wide space | interval and a narrow space | interval may be sufficient as the dust disposal tooth 71a 3 in the circumferential direction. The feed resistance may be weakened by giving a receding angle slightly tilted backward from the rear, and at that time, the receding angle of the dust disposal teeth 71a near the rear end of the dust disposal cylinder 71 is set to the dust exhaust of other parts. It is made larger than the processing tooth 71a to reduce the carrying around of the object to be processed.

In addition, the feed guide 81 may be placed in the feed direction at a position facing the communication port 75 in the feed direction to improve the uptake of the workpiece.
Further, the feed guides 81 provided in the dust removal processing chamber frame 72 may be connected so that the feed inclination angle can be changed integrally, or only the communication port 75 side can be fixed and the others can be changed integrally.

The lower part of the dust processing cylinder 71 and the outer peripheral part on the side of the handling chamber 66 in the lattice-shaped dust processing chamber frame 72 constitute a filter body of the dust processing chamber 68.
The distance between the filter body portion of the dust collection chamber frame 72 (the handling chamber 66 side in the left-right direction) and the rotation locus of the dust disposal teeth 71a is opposite to the handling chamber 66 in the left-right direction where the filter body is not provided. This is narrower than the interval between this part and the rotation trajectory of the dust disposal teeth 71a, and promotes leakage of the object to be treated.

The rear end of the dust treatment chamber frame 72 is provided with a dust removal chute that communicates with the lower part of the waste treatment chamber 82, and the workpiece that has reached the rear end of the dust treatment chamber 68 is moved to the outside of the threshing device 15. Discharge.
Leakage (grains) in the object to be treated mainly composed of sawdust containing a small amount of grains that entered the dust disposal chamber 68 leaks from the dust disposal chamber frame 72 onto the swing shelf 51. Then, it is guided to the Strollac 62 provided on the swing shelf 51 and sent from the second shelf board 85 to the second processing chamber 67 via the second lifting cylinder.

The second processing cylinder 70 and the dust removal processing cylinder 71 on the same axis are driven by a driving force transmitted from the engine via a pulley, not shown.
As shown in FIG. 3, a suction fan 87 for sucking an object to be processed is provided at the rear part of the threshing device 15, and dust having a low specific gravity among the dust discharged in the threshing device 15 including the dust processing chamber 68. Air containing scraps, branch branches, and dust is sucked with suction air generated by the rotation of the suction fan 87, blown out in the direction of arrow L from the third dust outlet 88, and discharged to the outside of the combine 1.

  On the other hand, the object to be processed that is not sucked by the air blown by the rotation of the suction fan 91 is provided at the rear end of the stroller 62 that is the terminal portion of the swing shelf 51, and second dust exhaust formed on the rear wall 15 a of the threshing device 15. It is discharged from the mouth 89 to the outside of the combine 1.

  The sawdust that has been transferred rearward on the swing shelf 51 and that is not filtered from the mesh of the chaff sheaves 53 and 54 and the Strollac 62 is subjected to the second discharge by the swing of the swing shelf 51 and the transport action of the Strollack 62. Although it is discharged from the throat 103 to the outside of the threshing device 15, the grain may be slightly contained in the sawdust, and thus the grain discharged to the outside of the combine 1 together with the sawdust is three. It is said that the third grain is discharged to the outside of the threshing device 15 as third loss (third loss), the third grain recovery loss, etc.

  FIG. 7 shows a general-purpose combine 100. On a chassis 92 equipped with a traveling device 91 composed of a crawler 90, a threshing device 93 with a stem feed port on the front side and a control unit 95 provided with a control seat 94 are arranged left and right. A Glen tank 96 is mounted on the rear side of the control unit 95 to collect the harvest.

  On the front side of the chassis 92, a cutting and picking case 97 having a width that combines the threshing device 93 and the control unit 95 is provided. The cutting and picking case 97 is provided with a horizontal transfer auger 98 and a cutting device 101 is provided at the bottom. The stalk discharge port of the cutting and scraping case 97 and the stalk supply port of the threshing device 93 are connected by a feeder case 116 having a bar conveyor 99 installed therein. A scraping reel 102 is provided on the front upper portion of the cutting and scraping case 97.

  The threshing device 93 has a handling chamber 109 in which a spiral handling cylinder 114 is pivoted in the front-rear direction and a first receiving net 103 and a second receiving net 104 are stretched on the lower side. In addition, a swing sorting shelf 105 is provided, and further, a red pepper 106, a first transfer spiral 110, and a second transfer spiral 111 are mounted in order from the upper side of the selection direction, and a dust outlet 112 is provided below the rear part. A sorting chamber 113 is provided, and the harvest supplied from the stalk feed port provided at the front and lower side of the spiral handling cylinder 94 is threshed, and the grains are sorted and stored in the glen tank 96.

The control unit 95 is provided with a control seat 94 on which an operator sits and a control device that controls the traveling device 91 and a threshing control device that intermittently drives the threshing device 93.
The Glen tank 96 is a hollow case for temporarily storing the grains selected by the threshing device 93, and the stored grains are transferred to the grain tank of the truck by the discharge auger 115.

The swing sorting shelf 105 includes a receiving shelf 121, a first sheave 122, a second sheave 123, and a sieve wire 124.
The receiving shelf 121 is a flat plate that receives an object to be processed that falls through the handling net 74, and a first guide plate 130 that guides the object to be processed to the left and right center of the first sheave 122 is provided on the upper surface.

  The first sheave 122 and the second sheave 123 have a structure in which the sheaves 117 erected with the band iron are arranged in parallel in the front-rear direction so that the granular material falls from the gaps between the sheaves 117. Scrapers 118 are inserted by being inserted from above at regular intervals in the lateral direction so as to remove stalks and the like that are clogged in, and each scraper 118 is connected by a connecting body 131 provided at regular intervals in the front-rear direction on the upper side. A first arm 125 connected to the swing arm 128, a swing arm 128, a connection arm 127, a second swing arm 132, and a second arm 126 so as to move left and right integrally, respectively, The scraper 118 of the two-sheave 123 is swung left and right. The swing arm 128 is driven to swing by a wire 129 connected to a drive motor.

  A connecting body 131 for connecting each scraper 118 is provided so as to float from each sheave 117 at an interval S1 that is equal to or larger than the particle size of the beans, and the connecting body 131 prevents the beans from jumping rearward on each sheave 117. Backward transport through is unhindered.

  The air blown from the tang 106 has not only the sorting air K1 directed to the first sheave 122 and the second sheave 123 but also the dry air K2 that wraps around the receiving shelf 121, and the receiving shelf 121, the first sheave portion 122 and the second sheave 122. The object to be processed on the sheave 123 is dried to improve sorting and separation.

In addition, when the harvest is a harvest having good grain-removing properties such as buckwheat, gold bean, and rapeseed, the scraper 118 may be provided only on the first sheave 122.
As shown in FIGS. 10 and 11, a second guide plate 120 is provided on the first sheave 122 to guide the workpiece to the adjacent scraper 118 obliquely backward, so that the beans jump backward. It is also possible to make it easier to flow backward while preventing The rear end of the second guide plate 120 has a gap wider than the diameter of the beans to the adjacent scraper 118.

66 Handling chamber 71 Dust removal cylinder 71a Dust removal treatment teeth 71b Front support plate 71d Rear support plate 80 Dust removal treatment chamber 81 Feed guide

Claims (5)

  In the threshing apparatus provided with the dust disposal chamber (80) communicating with the rear part of the handling chamber (66), a large number of rods are formed on the outer peripheral surface of the dust disposal cylinder (71) pivotally supported by the dust disposal chamber (80). The dust discharge treatment teeth (71a) are provided so as to protrude, and a plate-like feed guide (81) is provided inside the dust removal treatment cylinder frame (72) covering the periphery of the dust treatment copper (71). The guide (81) is disposed so as to be inclined so that the lower part of the dust removal treatment cylinder (71) in the rotational direction is located rearward with respect to the upper part of the dust removal treatment cylinder (71) in the rotation direction. Threshing device characterized by.   A front support plate (71b) provided on the outer periphery of the front portion of the dust removal treatment cylinder (71) and a dust removal treatment for attaching a support plate for attaching the dust removal treatment teeth (71a) to the outer peripheral surface of the dust removal treatment cylinder (71) The cylinder (71) is divided into a rear support plate (71d) provided on the outer periphery of the rear portion, and the front support plate (71b) and the rear support plate (71d) are detachable from the dust removal cylinder (71). The threshing apparatus according to claim 1, which is configured.   The installation interval of the dust removal treatment teeth (71a) was set so that the installation interval at the rear part of the dust removal treatment cylinder (71) was larger than the installation interval at the front part of the dust removal treatment cylinder (71). The threshing apparatus according to claim 1 or 2.   The threshing device according to claim 1, 2 or 3, wherein the dust disposal teeth (71a) are erected with a receding angle with respect to the rotational direction of the dust disposal barrel (71).   The receding angle of the dust disposal teeth (71a) provided at the rear portion of the dust disposal cylinder (71) with respect to the rotational direction of the dust disposal cylinder (71) is set at the front of the dust disposal cylinder (71). The threshing device according to claim 4, wherein the threshing device is set to be larger than the receding angle of the dust processing teeth (71a).

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