JP2009095287A - Structure for attaching or detaching grain sieve in thresher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the maintenance and durability of a grain sieve, without causing the structure to become complex and weight-enhancing of a swinging selection mechanism. <P>SOLUTION: The structure for attaching or detaching the grain sieve in a thresher, equipped with the grain sieve 24 capable of sieving grains from a treated product after threshing treatment and installed so as to be present over the right and the left sidewalls 53 and 54 of the swinging selection mechanism 11 is constituted, such that an engaging part 55, enabling the engagement with the right terminal part of the grain sieve 24, is formed at the lower edge part 53A of the right sidewall 53 of the swinging selection mechanism 11; and linking parts 54B and 57, enabling the link with the left terminal part of the grain sieve 24 with a linking tool 62, are formed at the right sidewall 53 so that the grain sieve 24 is constituted detachable to the bottom part of the swinging selection mechanism 11. An opening 34A, that allows the grain sieve 24 to be taken out and put in, is formed in the left side wall 34 of the thresher, and the opening is equipped detachably to a lid body 63 for closing the opening 34A. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a grain sheave attaching / detaching structure for a threshing apparatus in which a swing sieve mechanism is equipped with a grain sieve that allows grain leakage to span the right side wall and the left side wall of the swing sort mechanism.

As the above-described grain sheave attaching / detaching structure of the threshing device, the first and second side walls (left and right side walls) of the swing sorting case can be inserted and removed from the lateral side of the swing sorting case. A first opening is formed, and the grain sieve is configured to be attached to and detached from the swing sorting case through the first opening. With the attachment of the grain sieve to the swing sorting case at one end of the grain sieve. Putting in and out of the glenshave with the lid material on the side plate of the threshing device that includes the lid material that closes the first opening and is detachably connected to the first side wall and faces the first side wall of the swing sorting case There is one in which a second opening that enables the above is formed (see, for example, Patent Document 1).
JP 09-191753 A

  In the above-described conventional configuration, by providing the glensieve with the lid material that closes the first opening, the weight of the entire glenshave including the lid material increases. Therefore, the labor required for attaching and detaching the grain sieve increases. Moreover, it is necessary to form the 2nd opening part formed in the side plate of a threshing apparatus so that it may have an opening area larger than the area of a lid | cover material in order to permit the taking in / out of a lid | cover material by providing a lid | cover material in a glen sieve. Furthermore, it is necessary to form a lid for closing the second opening so as to have an area larger than the opening area of the second opening. Therefore, the weight of the lid that closes the second opening is increased, and the labor required to attach and detach the lid is increased. In other words, there is room for improvement in reducing labor required for maintenance such as cleaning and replacement of the glen sieve.

  Further, in the above-described conventional configuration, the support of the Glen sheave is a cantilever support that connects the lid member provided at one end of the Glen sheave to the first side wall of the swing sorting case, so there is room for improvement in terms of durability. is there.

  Therefore, in the invention described in Patent Document 1 described above, the end portion on the opposite side to the lid member of the grain sieve and the second side wall of the swing sorting case corresponding to this end portion can be engaged with each other. A configuration is described in which the mating protrusion and the engagement hole are arranged and arranged. By adopting this configuration, the support of the Glen sheave is connected to the above-described lid material on the one end side of the Glen sheave and the first side wall. In addition, it is possible to support both ends by engaging the engagement protrusions with the engagement holes on the other end side of the Glen sheave.

  However, when the above-described conventional structure is simply employed in the above-described conventional configuration, the above-described conventional configuration is a configuration in which a glensy sieve having a lid member at one end is inserted and removed from the first opening of the swing sorting case. Therefore, when engaging the engaging protrusion and the engaging hole, even if it is attempted to visually confirm the positional relationship from the first opening, the cover member becomes an obstacle and the engaging protrusion and the engaging hole It is extremely difficult to visually confirm the positional relationship between the engagement protrusion and the engagement hole, which is troublesome.

  In order to facilitate the engagement, it is conceivable to configure the glen sieve and the lid material independently. In this case, however, the glen sieve and the lid material are individually separated from the swing sorting case during maintenance of the glen sieve. It takes time and effort to attach and detach, and as a result, the maintainability of the Glen sieve is lowered.

  Therefore, in the invention described in Patent Document 1 described above, a guide rail that guides the glenve so that the end of the glenve on the engagement side is directed to the position of engagement with the oscillating sorting case, A configuration is described that spans between the first side wall and the second side wall. However, with this configuration, the provision of the guide rail leads to a complicated structure and an increased weight of the swing selection mechanism.

  That is, in the above configuration, in order to improve the durability of the swing sorting mechanism without reducing the maintainability of the Glen sieve, the structure becomes complicated and the swing sorting mechanism becomes heavy.

  An object of the present invention is to improve the maintainability and durability of the Glen sieve without complicating the structure and increasing the weight of the swing selection mechanism.

In order to achieve the above object, in the invention according to claim 1 of the present invention,
In the grain sieve attaching and detaching structure of the threshing apparatus, the swing sieve mechanism equipped with a sieve that separates the grain from the processed product after the threshing process so as to span the right side wall and the left side wall.
On the lower edge of one side wall of the right side wall and the left side wall, an engagement portion that enables engagement with the left and right end portions of the Glen sheave located on the same side as the one side wall is formed,
And, on the other side wall of the right side wall and the left side wall, a connecting portion that enables connection with a right and left other end portion of the Glen sheave located on the same side as the other side wall is formed. By
The bottom of the swing sorting mechanism is configured to be detachably equipped with the Glen sheave,
The side wall of the threshing device on the side where the connecting portion is located is provided with an opening that allows the grain sieve to be inserted and removed, and a lid that closes the opening is detachably mounted.

  According to this characteristic configuration, when performing maintenance such as cleaning or replacement of the grain sieve, first, the lid is removed from the side wall of the threshing device to open the opening. Next, a hand is inserted through the opening to release the connection between the connecting portion of the swing sorting mechanism and the left and right other ends of the grain sieve by the connecting tool. The engagement with the left and right end portions is released, and the grain sieve is removed from the bottom of the swing sorting mechanism and the grain sieve is taken out from the opening. As a result, the Glen sieve can be cleaned and replaced.

  After cleaning or replacement of the grain sieve, first, the grain sieve after maintenance is inserted into the space below the swing sorting mechanism from the opening. Next, from the opening, while visually confirming the positional relationship between the engaging portion of the swing sorting mechanism and the left and right end portions of the grain sieve located below, the left and right ends of the grain sieve are engaged with the engaging portion of the swing sorting mechanism. Engage parts. Thereafter, the right and left other end portions of the Glen sieve are connected to the connecting portion of the swing sorting mechanism by a connecting tool. Thereby, the Glen sieve is attached to the bottom of the swing sorting mechanism. And after the connection, a lid is attached to the side wall of the threshing device to close the opening.

  In other words, an engaging portion is formed at the lower edge of one of the side walls of the swing sorting mechanism, and a Glen sheave is provided at the bottom of the swing sorting mechanism so that the shelving can be attached to and detached from the swing sorting mechanism. This can be done using the space below. Therefore, unlike the conventional structure described above, it is not necessary to form an opening on the other side wall of the swing sorting mechanism that allows the grain sieve to be inserted and removed, and the lid that closes the opening is connected to the left and right other ends of the grain sieve. There is no need to prepare for the part.

  As a result, the weight of the grain sieve can be reduced, and the labor required for attaching and detaching the grain sieve can be reduced.

  Moreover, the opening formed in the side wall of the threshing device can be made relatively small having an opening area enough to allow the grain sieve to be inserted and removed, and as a lid that closes the opening, the opening area of the opening A relatively small one having a large area can be employed. As a result, the weight of the lid can be reduced, and the labor required for attaching and detaching the lid can be reduced.

  In addition, the support of the Glen sheave is obtained by engaging the left and right end portions of the Glen Sheave with the engaging portion of the swing sorting mechanism and connecting the left and right end portions of the Glen Sheave to the connecting portion of the swing sorting mechanism with a connector. While engaging both ends, when engaging the left and right ends of the Glen sieve with the engaging part of the swing sorting mechanism, the positional relationship between them can be easily visually confirmed from the opening. Engagement can be performed quickly without requiring a guide rail or the like.

  Therefore, it is possible to improve the maintainability and durability of the grain sheave without complicating the structure and increasing the weight of the swing sorting mechanism.

In the invention according to claim 2 of the present invention, in the invention according to claim 1,
The belt tension type transmission mechanism equipped on the side wall of the threshing device includes a biasing mechanism that enables switching between a tension state in which the transmission belt of the transmission mechanism is tensioned and a relaxation state in which the belt is relaxed,
The biasing mechanism includes a spring that tensions and biases the transmission belt, and an operation lever that is swingably and detachably engaged with the side wall of the threshing device,
The biasing mechanism is configured to be switched between a biased state in which the spring tensions the transmission belt and a release state in which the bias is released by a swinging operation of the operation lever. Features.

  By the way, in the threshing device, in addition to the swinging selection mechanism, the first screw that conveys the grain after sorting, the second screw that conveys a mixture containing unthreshed grains and broken straw after sorting, and In addition, a dust exhaust fan that discharges dust and the like that rises as a result of sorting to the outside of the machine is equipped, and a belt tension type transmission mechanism that enables transmission to these is provided on the side wall of the threshing device.

  Therefore, when inserting and removing the glenshive from the opening formed on the side wall of the threshing device, the transmission belt of the transmission mechanism provided on the side wall of the threshing device may become an obstacle.

  In view of this, the invention according to claim 2 adopts the above-described characteristic configuration. Accordingly, when the maintenance of the glenve is performed, the spring is released from the biased state by the swinging operation of the operating lever. To switch the transmission mechanism from the tensioned state to the relaxed state. Then, the transmission belt is removed from the opening region of the opening by, for example, removing the transmission belt that has been slackened by this switching from the transmission pulley. Moreover, when an operation lever is located in the opening area | region of opening, an operation lever is removed from the side wall of a threshing apparatus.

  Thereby, the insertion / removal of the glenshive from the opening formed in the side wall of the threshing apparatus can be quickly performed without being obstructed by the transmission belt of the transmission mechanism.

  After maintenance of the Glen Sheave, wrapping the transmission belt around the transmission pulley, etc., and then removing the operation lever from the side wall of the threshing device, attach the operation lever to the side wall of the threshing device, and swing the operation lever Thus, the spring is switched from the released state to the biased state, and the transmission mechanism is switched from the relaxed state to the tensioned state.

  Thereby, a transmission mechanism can be easily returned to the original transmission possible state.

  Therefore, even if a belt-tension type transmission mechanism is provided on the side wall of the threshing device, the maintainability of the grain sieve can be improved.

  Hereinafter, as an example of the best mode for carrying out the present invention, an embodiment in which a grain sheave attaching / detaching structure of a threshing apparatus according to the present invention is applied to a threshing apparatus for a self-detaching combine will be described with reference to the drawings.

  FIG. 1 is a longitudinal side view of a threshing device mounted on a self-decomposing combine. As shown in this figure, the threshing device includes a lower case 1 mounted on the left half of a vehicle body frame (not shown), an upper case 2 connected to the lower case 1 so as to be opened and closed, and the like. A processing space is formed. On the left side of the lower case 1, a feed chain 3 composed of an endless rotating chain with a protrusion is provided. The feed chain 3 receives the stock source side of the harvested cereal mash conveyed by the unillustrated harvesting and conveying device from the harvesting and conveying device, and between the holding rail (not shown) provided on the left side of the upper case 2 The tip of the harvested cereal rice bran is supplied to the processing space from the supply port 4 formed between the lower case 1 and the upper case 2.

  In the processing space, the threshing unit 5 that performs the threshing process on the tip side of the harvested grain culm, the sorting unit 6 that performs the sorting process on the processed product obtained by the threshing process, and the grains obtained by the sorting process are collected. A recovery unit 7 is provided.

  The threshing unit 5 is configured by a receiving net 8 detachably laid on the upper side of the lower case 1, a handling cylinder 9 provided in the upper case 2 so as to be able to rotate around a front and rear axis. Has been. The receiving net 8 is a lattice-shaped concave receiving net that is formed in an arc shape that curves along the outer periphery of the handling cylinder 9 and that can be divided into two in the circumferential direction of the handling cylinder 9. The arrangement is set so as to cover the lower side. The handling cylinder 9 is driven to rotate in the clockwise direction when viewed from the front by a power source from an engine (not shown), with a longitudinal axis as a fulcrum. Threshing processing is performed on the tip side of the harvested cereal rice bran supplied between 9 and the processed material obtained by the threshing treatment is leaked from the receiving net 8 toward the sorting unit 6 and leaked from the receiving net 8 The processed material that has not been discharged is discharged toward the sorting unit 6 from the dust feeding port 10 formed behind the receiving net 8.

  The sorting unit 6 includes a swing sorting mechanism 11 that performs a sieve sorting process on the processed product from the threshing unit 5, a main tang 12, a first sub tang 13, and a second sub that performs a wind sorting process on the processed product from the threshing unit 5. There are provided a Karatsu 14, a diffusion cylinder 15 that acts on the processed material from the dust feed port 10, a dust exhaust fan 16 that sucks dust such as straw scraps blown up by the wind sorting process and discharges it to the outside of the vehicle. It is configured.

  The swing sorting mechanism 11 includes a sheave case 17 having a rectangular shape in plan view, and a first grain pan 18 for coarse sorting, a second grain pan 19 for coarse sorting, A chaff sheave 20, a first Strollac 21 for rough sorting, a second Strollac 22 for rough sorting, and the like are provided. At the bottom of the sheave case 17, a guide plate 23 and a fine sieve 24 for fine sorting are arranged. An eccentric cam type drive unit 25 that is operated by power from the engine is provided at the rear portion of the sheave case 17. Thus, the swing sorting mechanism 11 is driven to swing when the drive unit 25 is operated by the power from the engine. By this swing, the processed product from the threshing unit 5 is subjected to a sieve sorting process, and a single grain is obtained. While the broken grains and the like are leaked, the cut straw and straw scraps that have not leaked are conveyed toward the dust outlet 26 formed at the rear end of the threshing apparatus.

  The main tang 12 is mounted on the front lower part of the lower case 1 so as to be able to rotate around the axial center facing left and right. The main tang 12 is driven to rotate about the left and right axial centers by the power from the engine, so that the main tang 12 flows from the front lower side of the grain sheave 24 toward the dust exhaust fan 16 and the dust outlet 26. A wind is generated, and the sorted wind causes a light blow of small specific gravity and straw scraps contained in the processed material that is finely selected by the grain sieve 24 to be conveyed to the dust exhaust fan 16 and the dust outlet 26 by wind power.

  The first sub-carp 13 is provided at the front end of the lower case 1 so as to be able to rotate around the left and right axis. Then, the first auxiliary tang 13 is rotationally driven by the power from the engine with a fulcrum of the left and right axis as a fulcrum, so that the dust exhaust fan 16 and the dust exhaust between the first gren pan 18 and the guide plate 23 are driven. A sorting wind that flows toward the mouth 26 is generated, and by this sorting wind, light cut straw and straw scraps and the like contained in the processed material that flows down toward the chaff sheave 20 are discharged into the dust fan 16 and the dust outlet 26. Carry wind power towards

  The second sub-carp 14 is mounted on the rear lower part of the lower case 1 so as to be able to rotate around the left and right axis. Then, the second auxiliary tang 14 is driven to rotate about the left and right axis by the power from the engine, thereby passing through the first strollac 21 and the second strollac 22 and the dust exhaust fan 16 and the like. A sorting wind that flows toward the dust outlet 26 is generated, and by this sorting wind, lightly cut straw or straw waste having a specific gravity contained in a processed product that is sieved and sorted by the first Strollac 21 or the second Strollac 22 And the like are conveyed to the dust exhaust fan 16 and the dust exhaust port 26 by wind power.

  The diffusion cylinder 15 is mounted on the rear upper part of the upper case 2 so as to be able to rotate around a left-right axis. Then, the diffusion cylinder 15 is rotationally driven by the power from the engine with the left and right axial centers as fulcrums, thereby loosening the processed material conveyed from the second Glen pan 19 toward the first Strollac 21. Further, leakage from the chaff sheave 20 and the first strollac 21 such as single grains and unthresh grains contained in the processed product is promoted.

  The dust exhaust fan 16 is mounted on the rear upper part of the upper case 2 so as to be able to rotate around the left and right axis. The dust exhaust fan 16 is rotationally driven by a motive power from the engine with a fulcrum about the left and right axis, thereby sucking dust such as straw scraps conveyed by the wind with the sorting wind to the dust outlet 26. To the outside of the machine.

  Thereby, the processed grain from the threshing unit 5 is a single grain that leaks from the grain sieve 24, a non-threshed grain as a second thing supplied behind the grain sieve 24, a cut straw, and the like Can be sorted with high accuracy into a mixed product and a cut straw or straw scrap as a third product discharged from the dust outlet 26 to the outside of the machine.

  The collection unit 7 collects the first collection unit 27 formed below the grain sieve 24 so as to collect the single grains that have leaked from the grain sieve 24, and the mixture supplied behind the grain sieve 24. And a second recovery portion 28 formed behind the grain sieve 24. At the bottom of the No. 1 recovery unit 27, the single-grained grains recovered by the No. 1 recovery unit 27 are conveyed to the right by being rotationally driven about the left and right axial centers by the power from the engine. No. 1 screw 29 is provided. No. 2 that conveys the mixture collected by the No. 2 collection unit 28 to the right by being rotated around the left and right axis by the power from the engine at the bottom of the No. 2 collection unit 28 A screw 30 is provided.

  At the right end of the No. 1 screw 29, by linking with the No. 1 screw 29, the single-grained grain conveyed by the No. 1 screw 29 is lifted and supplied to the inside of the grain tank (not shown). A lifting conveyor 31 is connected. At the right end of the No. 2 screw 30, after being handled by the No. 2 treated copper 32, the No. 2 treated copper 32 that treats the mixed material conveyed by the No. 2 screw 30 in conjunction with the No. 2 screw 30. Is connected to a second reduction screw 33 that reduces the mixed material to the sorting unit 7.

  Although illustration is omitted, power from the engine is transmitted to the threshing device via a belt tension type threshing clutch. The threshing device is equipped with a power distribution mechanism that distributes and supplies power from the engine to the barrel 9 and the main tongue 12.

  As shown in FIGS. 2 to 5, the motive power supplied to the main tongue 12 is a belt tension type first transmission mechanism 35 disposed on the outer surface side of the left side wall (an example of the side wall of the threshing device) 34 in the lower case 1. The power supplied to the first auxiliary screw 13 and the first screw 29 and supplied to the first screw 29 is supplied to the belt tension type second transmission mechanism 36 disposed on the outer surface side of the left side wall 34. The second sub-carp 14, the diffusion cylinder 15, and the second screw 30 are distributed.

  The second transmission mechanism 36 includes a first transmission pulley 37 that rotates integrally with the first screw 29, a second transmission pulley 38 that rotates integrally with the second auxiliary rod 14, and a third transmission pulley 39, 2 that rotates integrally with the diffusion cylinder 15. A fourth transmission pulley 40 that rotates integrally with the screw 30, an output pulley 41 that enables transmission to the dust exhaust fan 16, a pair of idle pulleys 42, a tension pulley 43, and a transmission that crosses over them. The belt 44 is configured.

  As shown in FIGS. 2 to 6, the tension pulley 43 is disposed at the free end of the tension arm 45 that swings about the axis of the first screw 29 as a fulcrum. The tension arm 45 is oscillated and urged in a tension direction by an urging mechanism 47 that extends between the free end portion and a support 46 provided on the left side wall 34.

  The urging mechanism 47 includes a tension spring 48 whose one end is locked to the free end of the tension arm 45, a tension bolt 49 that is locked to the other end of the tension spring 48, and a boss that is screwed to the tension bolt 49. And an operation lever 52 that receives and supports the tension bolt 49 via the nut 50, and urges the second transmission mechanism 36 to swing the tension arm 45 in the tension direction. The transmission belt 44 can be switched between a tension state where the transmission belt 44 is tensioned and a relaxed state where the bias is released and the transmission belt 44 is relaxed.

  The receiver 46 is formed with a recess 46A that allows the tension bolt 49 to be engaged, and a pair of left and right engagement holes 46B that allow the operation lever 52 to be engaged and held. The operating lever 52 includes a slit 52A that allows sliding displacement of the tension bolt 49 with respect to the operating lever 52, a pair of left and right engaging claws 52B that engage with the corresponding engaging holes 46B of the support 46, and an urging force. A pedestal portion 52C that enables the mechanism 47 to be maintained in a tension state, and a grip portion 52D that extends straight from the pedestal portion 52C are formed.

  In this configuration, when the urging mechanism 47 is assembled, first, the operation lever 52 is linked to the tension arm 45 via the tension spring 48 and the tension bolt 49. Next, each engagement claw 52B of the operation lever 52 is engaged with the corresponding engagement hole 46B of the support 46, and each engagement so that the grip 52D of the operation lever 52 rises along the left side wall 34. Engagement of the engaging claws 52B into the holes 46B is deepened. Then, due to the action of the tension spring 48, the tension bolt 49 is slid along the slit 52 </ b> A of the operation lever 52 toward the pedestal portion 52 </ b> C of the operation lever 52 and is engaged with the recess 46 </ b> A of the holder 46. Further, as the grip 52D rises, the pedestal 52C of the operation lever 52 is placed on the support 46, and a nut that is screwed onto the pedestal 52C and the tension bolt 49 by the action of the tension spring 48. 50 is placed.

  In this state, the tension spring 45 is oscillated and biased in the tension direction by the action of the tension spring 48, and the pedestal portion 52 </ b> C of the operation lever 52 is sandwiched between the receiver 46 and the nut 50. As a result, the tension spring 48 of the biasing mechanism 47 is maintained in a biased state in which the transmission belt 44 is tensioned via the tension arm 45, and the second transmission mechanism 36 is tensioned. Maintained in tension.

  In this state, when the screwing position of the nut 50 with respect to the tension bolt 49 is adjusted, the tension arm 45 can be oscillated and urged in the tension direction with an appropriate urging force, and then the locking nut 51 is used to prevent loosening. As a result, an appropriate biased state of the tension spring 48 that swings and biases the tension arm 45 in the tension direction with an appropriate biasing force is maintained, and the second transmission mechanism is brought into a tensioned state in which the transmission belt 44 is properly tensioned. 36 is maintained.

  In this tension state, when the grip portion 52D of the operation lever 52 is tilted from the standing posture toward the left outward, the pedestal portion 52C of the operation lever 52 rises apart from the support 46 along with the tilt. At the same time, due to the action of the tension spring 48, the tension bolt 49 is slidably displaced along the slit 52 </ b> A from the pedestal 52 </ b> C of the operation lever 52 toward the grip 52 </ b> D and comes out of the recess 46 </ b> A of the holder 46. Further, as the grip 52D of the operation lever 52 tilts downward to the left, the tension bolt 49 comes into contact with the free end side of the operation lever 52, and the tension spring 48 switches from the biased state to the released state. By changing to a free length, the swinging biasing of the tension arm 45 in the tension direction is released, and the second transmission mechanism 36 is switched from the tensioned state to the relaxed state and maintained in that state.

  In this relaxed state, when the grip portion 52D of the operation lever 52 is raised toward the left side wall 34, the tension bolt 49 is slidably displaced toward the pedestal portion 52C along the slit 52A by the action of the tension spring 48. And engages with the recess 46A of the receiver 46. Further, as the grip 52D rises, the pedestal 52C of the operation lever 52 is placed on the support 46, and a nut that is screwed onto the pedestal 52C and the tension bolt 49 by the action of the tension spring 48. By mounting 50, the second transmission mechanism 36 is switched to an appropriate tension state set at the time of assembly and maintained in that state.

  And in the relaxed state mentioned above, since the tension spring 48 becomes free length, each engagement claw 52B of the operation lever 52 can be easily extracted from each engagement hole 46B of the holder 46.

  That is, by swinging the operation lever 52, the second transmission mechanism 36 can be easily switched between the tension state and the relaxation state, and the operation lever 52 can be detached from the support 46. Thus, maintenance such as replacement of the transmission belt 44 can be easily performed.

  As shown in FIGS. 2 to 9, the sheave case 17 is bent so that the lower edge portions 53 </ b> A and 54 </ b> A of the right side wall 53 and the left side wall 54 are directed inward of the sheave case 17. A support member 56 having an L-shaped cross-section that forms an engagement groove 55 (an example of an engagement portion) facing in the front-rear direction is welded to the right side wall 53 between the lower surface of the lower edge portion 53A. The left side wall 54 is formed with a pair of front and rear through holes (an example of a connecting portion) 54B, and a back nut (an example of a connecting portion) 57 is welded.

  The grain sieve 24 includes a crimp net 58 having a rectangular shape in plan view, a first reinforcing member 59 joined to a right end portion of the crimp net 58 in a posture along the right edge from the lower surface side, and a left end portion of the crimp net 58 from the lower surface side to the left edge. The second reinforcing member 60 joined in a posture along the front, the third reinforcing member 61 joined in a posture along the front edge from the lower surface side to the front end portion of the crimp net 58, and the like. The first reinforcing member 59 includes a flat part 59A joined to the crimp net 58, a first hanging part 59B hanging from the left end part of the flat part 59A, and a second hanging part hanging from the rear end part of the flat part 59A. And 59C. The second reinforcing member 60 is bent so as to have a flat surface portion 60A joined to the crimp net 58 and an upright portion 60B rising from the left end portion of the flat surface portion 60A. The standing portion 60B is formed with a pair of front and rear through holes 60C at positions facing the through holes 54B of the left side wall 54. The third reinforcing member 61 is bent so as to have a flat portion 61A joined to the crimp net 58 and a hanging portion 61B depending from the rear end portion of the flat portion 61A.

  In the sheave case 17, the engagement groove 55 is formed to allow the right end portion of the grain sheave 24, that is, the right end portion of the crimp net 58 and the flat portion 59 </ b> A of the first reinforcing member 59 to be engaged. The support member 56 is formed with an inclined surface 56 </ b> A that guides the right end portion of the grain sheave 24 to the engagement groove 55.

  With this configuration, the right end portion of the grain sheave 24 is engaged with the engagement groove 55 of the sheave case 17, and the standing portion 60 </ b> B of the grain sheave 24 is attached to the left side wall 54 of the sheave case 17 with a pair of front and rear bolts (an example of a connecting tool) 62. By connecting, the sheave 24 can be easily mounted on the bottom of the sheave case 17. Further, by releasing the bolt connection between the left side wall 54 of the sheave case 17 and the rising portion 60B of the sheave case 24 and extracting the right end portion of the sheave case 24 from the engagement groove 55 of the sheave case 17, the glen sheave from the bottom of the sheave case 17 is removed. 24 can be easily removed.

  In the grain sheave 24, the second hanging portion 59 </ b> C of the first reinforcing member 59 and the hanging portion 61 </ b> B of the third reinforcing member 61 are in a state where the right end portion of the grain sheave 24 is engaged with the engaging groove 55 of the sheave case 17. The second hanging portion 59C of the first reinforcing member 59 is set to be adjacent to the rear end portion of the supporting member 56, and the hanging portion 61B of the third reinforcing member 61 is set to be adjacent to the front end portion of the supporting member 56. . In other words, the second sheave 59 </ b> C of the first reinforcing member 59 and the drooping portion 61 </ b> B of the third reinforcing member 61 can position the grain sheave 24 with respect to the sheave case 17 in the front-rear direction.

  The left side wall 34 of the lower case 1 is formed with an inspection port (an example of an opening) 34A for inspecting the state of the collection unit 7 and the like at a location facing the glenshive 24, and a lid that closes the inspection port 34A A body 63 is detachably mounted. The inspection port 34A is formed to have an opening area that allows the grain sieve 24 to be taken in and out from the inspection port 34A. A plurality of engaging pieces 63 </ b> A are formed on the lower edge of the lid 63 so as to be engaged with the lower edge of the inspection port 34 </ b> A. A pair of front and rear through holes 63 </ b> B are formed in the upper edge portion of the lid 63. The left side wall 34 is formed with through holes 34B at positions facing the through holes 63B of the lid 63, and a back nut 64 is welded.

  That is, by engaging each engagement piece 63A of the lid 63 with the lower edge of the inspection port 34A and connecting the upper edge of the lid 63 to the left side wall 34 of the lower case 1 with a pair of front and rear bolts 65. The inspection port 34A can be easily closed by the lid 63. Further, the bolt connection between the left side wall 34 of the lower case 1 and the upper edge of the lid 63 is released, and the engagement between the lower edge of the inspection port 34A and each engagement piece 63A of the lid 63 is released. Thus, the inspection port 34A can be easily opened.

  With the above configuration, when performing maintenance such as cleaning or replacement of the glenve 24, first, the operation lever 52 of the urging mechanism 47 is tilted to the left from the standing posture, and the urging mechanism 47 is in a tensioned state. To the relaxed state. Then, after this switching, the operation lever 52 is removed from the support 46 of the left side wall 34 in the lower case 1, and the urging mechanism is removed by removing the transmission belt 44 loosened by the switching from the third transmission pulley 39. 47 and the transmission belt 44 are removed from the opening area of the inspection port 34A. Thereafter, the lid 63 is removed from the left side wall 34 of the lower case 1 and the inspection port 34A is opened, so that the operation of the inspection port 34A removes the grain sheave 24 from the bottom of the sheave case 17 and removes it from the inspection port 34A. It is possible to easily clean and replace the grain sieve 24.

  After cleaning or replacing the grain sheave 24, the maintenance-finished grain sheave 24 is inserted through the inspection port 34 </ b> A and attached to the bottom of the sheave case 17. After this attachment, the lid 63 is attached to the left side wall 34 of the lower case 1 to close the inspection port 34A. Thereafter, the transmission belt 44 is wound around the third transmission pulley 39 and so on so as to pass through the opening region of the inspection port 34A, and then the operation lever 52 of the urging mechanism 47 is moved to the opening region of the inspection port 34A. By engaging the support 46 of the left side wall 34 so as to pass through, and standing up along the left side wall 34, and switching the biasing mechanism 47 from the relaxed state to the tensioned state, the original workable state is easily achieved. Can be returned to.

  Although not shown, the left side wall 34 of the lower case 1 is detachably equipped with a decorative cover that covers the first transmission mechanism 35, the second transmission mechanism 36, and the like.

    [Another embodiment]

[1] As a threshing device, it may be one that is mounted on an all-throw-in type combine. Moreover, the thing which is not provided with the sub-red peppers 13 and 14 may be sufficient.

[2] The swing sorting mechanism 11 can be variously changed in arrangement and configuration of the grain pans 18 and 19 and the chaff sheave 20 as long as the grain sheave 24 is detachably provided at the bottom thereof.

[3] The glenshive 24 may be provided with a resin net or the like instead of the crimp net 58.

[4] The structure for attaching and detaching the grain sieve 24 may be configured such that the grain sieve 24 is inserted and removed from the opening 34A formed in the right side wall of the threshing apparatus.

[5] The shape and quantity of the engaging part 55 and the connecting parts 54B and 57 can be variously changed. The type and quantity of the connecting tool 62 can be changed according to the shape and quantity of the connecting parts 54B and 57. Various changes are possible.

[6] The opening 34 </ b> A may be formed for attaching and detaching the grain sheave 24. Further, the size and shape of the opening 34 </ b> A and the lid 63 can be variously changed according to the size and shape of the grain sieve 24.

[7] The belt tension type transmission mechanism 36 may be configured to distribute and supply the power supplied to the main tang 12 to the first auxiliary tang 13 or the first screw 29, Further, the power supplied to the main tang 12 is distributed and supplied to the second auxiliary tang 14 and the second screw 30 in addition to the first auxiliary tang 13 and the first screw 29. May be.

[8] The configuration of the urging mechanism 47 can be variously modified as long as a structure that allows the transmission mechanism 36 to be switched between a tension state and a relaxation state can be obtained by swinging the operation lever 52. It is.

Longitudinal side view of threshing device Side view of the main part showing the attachment and detachment structure of the Glen Sheave Longitudinal rear view of main part showing tension state of second transmission mechanism Longitudinal rear view of main part showing relaxed state of second transmission mechanism Longitudinal rear view of the main part showing the attachment / detachment state of the Glen Sheave The exploded perspective view of the principal part showing the composition of the urging mechanism Longitudinal rear view of the main part showing the attachment / detachment structure of the Glen Sheave Top view of Glensheve The exploded perspective view of the principal part which shows the attachment / detachment structure of a Glen sheave

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Oscillating sorting mechanism 24 Glen sieve 34 Side wall 34A opening 36 Belt tension type transmission mechanism 44 Transmission belt 47 Energizing mechanism 48 Spring 52 Operation lever 53 Right side wall sieve 53A Lower edge part 54 Left side wall sieve 55B Connecting part 55 Engagement Joint part 57 connection part 62 connection tool 63 lid

Claims (2)

A grain sieve attaching and detaching structure for a threshing device, wherein the swing sieve mechanism is equipped with a grain sieve for sieving the grain from the processed product after the threshing process so as to span the right side wall and the left side wall of the swing sort mechanism,
On the lower edge of one side wall of the right side wall and the left side wall, an engagement portion that enables engagement with the left and right end portions of the Glen sheave located on the same side as the one side wall is formed,
And, on the other side wall of the right side wall and the left side wall, a connecting portion that enables connection with a right and left other end portion of the Glen sheave located on the same side as the other side wall is formed. By
The bottom of the swing sorting mechanism is configured to be detachably equipped with the Glen sheave,
In the threshing apparatus, an opening that allows the grain sieve to be inserted and removed is formed in a side wall of the threshing apparatus on the side where the connecting portion is located, and a lid that closes the opening is detachably mounted. Glen sheave removable structure. The belt tension type transmission mechanism equipped on the side wall of the threshing device includes a biasing mechanism that enables switching between a tension state in which the transmission belt of the transmission mechanism is tensioned and a relaxation state in which the belt is relaxed,
The biasing mechanism includes a spring that tensions and biases the transmission belt, and an operation lever that is swingably and detachably engaged with the side wall of the threshing device,
The biasing mechanism is configured to be switched between a biased state in which the spring tensions the transmission belt and a release state in which the bias is released by a swinging operation of the operation lever. The grain sheave attaching / detaching structure of the threshing device according to claim 1,

Images