JP7296920B2 - Thresher and combine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a threshing device equipped with a sieve case for sorting out threshed material, and a combine having the threshing device.

As shown in Patent Document 1, a combine is provided with a threshing device for threshing harvested crops, and the threshing device is provided with a sorting section for sorting threshed grains (threshed grains). The sorting unit includes a sieve case for rocking and sorting the threshed grains. The sheave case can be pulled out from the fuselage for maintenance or the like.

Since the sieve case is heavy, it is not easy to insert and remove the sieve case. In some cases, a maintenance jig (frame body) for holding the sheave case separate from the combine is used to assist the sheave case insertion and removal when the sheave case is inserted and removed.

JP 2019-126285 A

However, even with a jig or the like, it is not easy to pull out or store the sheave case.

Therefore, it is desired to more easily pull out the sheave case from the machine and store it inside the machine.

A threshing apparatus according to an embodiment of the present invention comprises a threshing unit for threshing crops, a sorting unit provided below the threshing unit for sorting threshed products threshed by the threshing unit, and A threshing part and an outer wall part provided laterally outwardly of the sorting part are provided, and the sorting part is provided with a sieve case that is driven to swing along the outer wall part and sorts the threshed material. a first portion of the outer wall portion facing the lateral outer portion of the sheave case is configured to be separable from the other second portion of the outer wall portion, and the first portion is An opening is formed in the outer wall portion by being cut off from the second portion, and the sheave case is rotatably supported around a vertically oriented vertical axis, and It can be rotated around and pulled out to the outside of the device through the opening through the outer wall.

With such a configuration, the sheave case can be easily pulled out from the stored state in which it is housed in the threshing device to the protruding state in which it protrudes outside the threshing device by rotating around the vertical axis. Further, when the sheave case is displaced from the projecting state to the retracted state, the sheave case can be easily displaced by rotating around the vertical axis. Therefore, the sheave case can be easily pulled out and stored without using a jig or the like, and the sheave case can be pulled out of the machine and stored in the machine more easily.

Further, the first portion is configured to be rotatable about the vertical axis, and the sheave case and the first portion are connected to each other and integrally rotatable about the vertical axis. good.

With such a configuration, the sheave case rotates integrally with the first portion, so that the sheave case can be easily rotated simply by rotating the sheave case without removing the first portion, which is the outer wall portion. The sheave case can be pulled out, improving the operability of the sheave case.

Further, a frame body provided to surround the sheave case, and a support frame supporting the frame body so as to be rotatable about the vertical axis are provided. The sheave case may be supported by the frame body so as to be swingable.

Since the structure includes a frame body for swingably supporting the sheave case and rotates the frame body, the sheave case and the sheave case are less likely to swing than a structure in which the sheave case is rotated alone. There is no need to separate the drive structure, and work efficiency is improved when pulling out the sheave case (during maintenance). In addition, since the sheave case and the rocking drive structure do not need to be separated, the rocking drive structure does not deteriorate due to repeated disconnection, compared to a structure that requires separation.

Further, the frame body is provided with the first portion and an opposite side portion located on the opposite side of the first portion with the sheave case therebetween, and the left and right side portions of the front portion of the sheave case are provided with the Each of the first portion and the opposite portion may be provided with left and right arm portions that are hung so as to be swingable back and forth around a horizontal horizontal axis.

By adopting a back-and-forth oscillating structure using an arm portion, the front portion of the sheave case is connected to the first portion and the opposite side portion even when the sheave case rotates about the vertical axis. The sheave case and the frame body can be rotated in a stable state compared to a structure in which the front-rear movement structure of the front portion is composed of rails and rollers.

Further, the other side wall portion provided on the opposite side to the outer side wall portion with the threshing portion and the sorting portion interposed therebetween is provided, and both ends of the swing drive shaft for swinging the sheave case are connected to the The pivotal support portion of the other side wall portion that supports the swing drive shaft and the swing drive shaft are rotatably supported by the outer side wall portion and the other side wall portion, and the swing drive shaft and the sheave case and the first portion are It may be integrally rotatable around the vertical axis.

Since the sheave case and the rocking drive structure are rocked integrally, there is no need to separate them, and work efficiency is improved when the sheave case is pulled out (during maintenance). In addition, since the sheave case and the rocking drive structure do not need to be separated, the rocking drive structure does not deteriorate due to repeated disconnection, compared to a structure that requires separation.

Further, the second portion is located below the first portion, and in a state where the sieve case is accommodated inside the screening portion, the first portion may be placed and supported on the upper end portion of the second portion. good.

When the sheave case is accommodated, the load of the sheave case can be firmly supported by the second portion, and the load on the rocking structure of the sheave case is reduced.

A boundary portion between the first portion and the second portion may be provided with an inclined portion that descends toward the vertical axis in a side view.

Due to the wedge effect of the sloped shape of the sloped portion, the first portion and the second portion are brought into close contact with each other to improve the sealing performance of the threshing apparatus. In addition, the sheave case is less likely to sag compared to the case where the load of the first portion is applied to the vertical axis side and the sheave case is tilted away from the vertical axis.

Furthermore, a combine according to an embodiment of the present invention is a combine including the threshing device, which is provided in a laterally aligned state with the threshing device, and stores grains threshed and sorted by the threshing device. The grain storage part is provided, and the vertical axis is set in the lateral side part of the sheave case on the side of the grain storage part.

With such a configuration, even in a combine harvester, the sheave case can be easily pulled out of the machine and stored inside the machine, and the maintenance of the sheave case is facilitated.

It is a left view which illustrates the structure of a combine. It is a longitudinal left side view which illustrates schematic structure of a threshing apparatus. FIG. 3 is a plan view illustrating the schematic configuration of the sorting device in which the sieve case is housed; Fig. 2 is a left side view illustrating the schematic configuration of the sorting device in which the sieve case is housed; Fig. 2 is a right side view illustrating the schematic configuration of the sorting device in which the sieve case is housed; FIG. 4 is a plan view illustrating a schematic configuration with the sieve case pulled out; It is a top view which illustrates the structure of the combine in the state which opened the grain tank. FIG. 11 is a right side view illustrating a configuration in which the opening/closing portion of the second collection portion is closed; FIG. 11 is a right side view illustrating a configuration in which the opening/closing portion of the second collection portion is open; FIG. 10 is a perspective view illustrating the configuration of an operation tool for operating the opening/closing portion of the second collection portion;

An embodiment of a combine according to the present invention will be described with reference to the drawings. In the following description, the direction of arrow F shown in FIG. 1 is the front of the combine, and the direction of arrow B is the rear of the combine. The left and right direction is the left and right direction when facing forward.

[Overall configuration of combine harvester]
As shown in FIG. 1, the combine includes a body frame 1, a traveling device 2, an operating section 3, a harvesting section 4, a threshing device 7, a grain tank 8, a grain discharging device 10, and the like. The traveling device 2 , the operating section 3 , the harvesting section 4 , the threshing device 7 , the grain tank 8 , and the grain discharging device 10 are supported by the body frame 1 . The threshing device 7 includes a threshing section 7 a and a sorting section 5 .

The combine has skin panels 15b on both left and right sides of the machine body. Each of the left and right skin panels 15b is divided into one or a plurality of panels, each of which is supported in a detachable manner from the fuselage. The left skin panel 15b is provided so as to cover the left side surface of the threshing device 7. As shown in FIG. The right skin panel 15b is provided so as to cover the right side surface of the grain tank 8 .

The traveling device 2 is driven by a power source such as an engine E to cause the body to travel. The traveling device 2 is a pair of left and right crawlers. The operation unit 3 is an area where a driver gets on and controls the aircraft, and is provided in a front right area of the aircraft.

The reaping unit 4 is provided in the front region of the machine body, and reaps and harvests planted culms, which are crops such as rice and wheat planted in a field. The reaping part 4 is provided with a supply/conveyance device 14, and the supply/conveyance device 14 conveys the harvested grain culms toward the rear of the machine body.

The threshing part 7a threws the reaping grain culms harvested by the reaping part 4 . The threshing section 7a is arranged behind the harvesting section 4 in the left-hand region of the fuselage. The harvested grain culms harvested by the harvesting unit 4 are transported from the harvesting unit 4 to the threshing unit 7 a by the supply transport device 14 and the feed chain 11 .

The sorting unit 5 sorts out grains from the threshed product, which is the product threshed by the threshing unit 7a. The sorting section 5 is arranged below the threshing section 7a.

The grain tank 8 stores the grains sorted by the sorting unit 5, which are sorted products. A grain tank 8 is arranged in the right-hand region of the fuselage behind the driving section 3 . The grain discharge device 10 discharges the grain stored in the grain tank 8 to the outside of the machine body as needed.

[Threshing device]
Next, the detailed configuration of the threshing device 7 will be described with reference to FIGS. 1 and 2. FIG.

The threshing section 7 a includes a threshing chamber 16 , a feed chain 11 , a separating drum 18 , a straw conveying device 19 , a dust exhaust fan 20 and a receiving net 21 . A handling cylinder 17 is provided in the handling chamber 16 .

The harvested grain culms transported from the harvesting unit 4 are transported by the supply transport device 14 and the feed chain 11 , and the tip portion is inserted into the handling chamber 16 . The harvested culms inserted into the threshing chamber 16 are threshed by a threshing cylinder 17 provided in the threshing chamber 16 . The threshed material threshed by the threshing cylinder 17 falls toward the sorting section 5 through the receiving net 21 .

After the harvested culms conveyed by the feed chain 11 are threshed in the threshing chamber 16 , the separation drum 18 separates the separated material containing the remaining grains. The separated material to be separated falls toward the sorting section 5 . The straw conveying device 19 discharges the straw, which is the harvested grain culm after passing through the handling chamber 16 , to the straw shredding device 9 . The dust exhaust fan 20 sucks the waste straw and dust in the threshing section 7a and discharges it outside the machine through the waste straw shredding device 9. - 特許庁The straw shredding device 9 is provided in the rear region of the threshing section 7a. The straw shredding device 9 has a pair of rotary blades 9a, and the straw and the like discharged by the straw conveying device 19 are chopped by the rotary blades 9a and discharged out of the machine. Further, the discharged straw shredding device 9 can be opened and closed with respect to the machine body by swinging around the vertical axis.

The sorting unit 5 includes a sieve case 6 , a winnow 22 , a first collection unit 23 and a second collection unit 24 .

The sheave case 6 includes a grain pan 29 , a chaff sieve 30 , a grain sieve 31 , a straw rack 32 and a swing drive shaft 33 . The rocking drive shaft 33 is provided in the left-right direction of the machine body, and rocks the sheave case 6 when the drive of the engine E is input. The sieve case 6 sorts the threshed material by being driven to swing.

The grain pan 29 swings to feed the threshed material falling from the receiving net 21 toward the rear of the machine body. The straw rack 32 oscillates to feed the separated material falling from the separation drum 18 toward the front of the machine body.

The threshed material delivered from the grain pan 29 and the separated material delivered from the straw rack 32 are sorted by the chaff sieve 30 and the grain sieve 31 . The grains that have fallen through the chaff sieve 30 and the grain sieve 31 are sorted grains. The grains fall to the first recovery section 23 .

The winnow 22 is arranged in the lower region of the front part of the sorting section 5, and blows the sorting air toward the rear of the machine body. The sorting wind blows away foreign matter other than grains and waste straws in the sieve case 6 which do not pass through the chaff sieve 30 and the grain sieve 31 toward the rear of the machine body, and discharges them from the rear of the machine body via the dust discharge fan 20. - 特許庁The threshed material that has not passed through the chaff sieve 30 and the grain sieve 31 and has not been blown away by the sorting wind falls into the second recovery section 24 .

The grains that have fallen to the first recovery section 23 are conveyed to the grain tank 8 by the first recovery section 23 . The unsorted materials that have fallen into the second recovery section 24 are returned to the front portion of the sieve case 6 by the second recovery section 24 .

[Opening and closing the sheave case]
As shown in FIGS. 3 to 6, the sorting section 5 has a side wall (corresponding to the “outer wall portion”) 25 on the left lateral side portion, which is the laterally outer side of the fuselage. The upper ends of the side walls 25 extend laterally outwardly of the threshing device 7 . The side wall 25 is provided in a laterally outer portion of the sorting section 5 so as to be separable into an upper side wall 25a (corresponding to the “first portion”) and a lower side wall 25b (corresponding to the “second portion”). The upper side wall 25 a corresponds to a portion of the side wall 25 facing the sheave case 6 and covers the left side surface of the sheave case 6 . The lower side wall 25b is a portion of the side wall 25 other than the upper side wall 25a, and covers the left side of the portion of the screening section 5 below the sieve case 6. As shown in FIG. In addition, the front and right lateral sides of the threshing device 7 are covered with a front threshing wall 7d and a right threshing wall (corresponding to the "other side wall") 7c, respectively. As a result, the side walls 25, the front threshing wall 7d and the right threshing wall 7c form a threshing wall 7b that covers the front and left and right lateral sides of the threshing device 7. As shown in FIG.

The sheave case 6 is supported within a box-shaped frame body 6a whose upper and lower portions are open. The frame body 6a surrounds the front, rear, left, and right of the sheave case 6. As shown in FIG. The left side surface of the frame body 6a corresponds to the upper side wall 25a. A portion of the frame body 6a located on the opposite side of the upper side wall 25a across the sheave case 6 is a rear side frame (corresponding to the "opposite side portion") 6b.

A rear region of the sheave case 6 is supported by the swing drive shaft 33 . The swing drive shaft 33 rotates as the pulley 33a rotates, and the pulley 33a rotates when the drive of the engine E is transmitted through the belt 33b and the like. The rocking drive shaft 33 is provided across the upper side wall 25a of the frame body 6a and the rear side frame 6b, and rotates around an axis extending in the left-right direction of the machine body. The swing drive shaft 33 is supported by shaft support portions 25c provided on the upper side wall 25a and the rear side frame 6b, respectively. The swing drive shaft 33 is bent like a crank so as to protrude from the axis, and the protruding portion is connected to the rear region of the sheave case 6 . The protruding portion of the swing drive shaft 33 rotates with the rotation of the swing drive shaft 33 in a state where the trajectory draws a circle centering on the axis. Therefore, the rear region of the sheave case 6 rotates in a circular manner as the swing drive shaft 33 rotates.

A front region of the sheave case 6 is supported by the frame body 6a via arm portions 6c provided on the upper side wall 25a and the rear side frame 6b, respectively. One end of the arm portion 6c is supported by the upper side wall 25a or the rear side frame 6b so as to be swingable about an axis extending in the lateral direction of the machine body, and the other end is supported by the sheave case 6 via the arm shaft 6d. be. The right arm portion 6c is provided on the right lateral outer side of the back side frame 6b, and the left arm portion 6c is provided on the left lateral outer side of the upper side wall 25a. The arm shaft 6d protrudes from both left and right lateral exteriors of the sheave case 6. As shown in FIG. The right arm shaft 6d passes below the back side frame 6b and protrudes to the right side of the back side frame 6b. The left arm shaft 6d passes through an arm opening 6e provided in the upper side wall 25a and protrudes to the left side (outside) of the upper side wall 25a. The front region of the sheave case 6 swings as the rear region of the sheave case 6 rotates. The swinging range of the front region of the sheave case 6 is defined by the arm opening 6e and the arm shaft 6d. In this manner, the sheave case 6 swings.

The upper portion of the rear end portion, which is at least a portion of the rear end portion of the right threshing wall 7c, is a right rear threshing wall 7e, and the right rear threshing wall 7e is configured to be separable from the other portion of the right threshing wall 7c. be. The right rear threshing wall 7e is supported by the support frame 1a supported by the right threshing wall 7c. The support frame 1a is connected to the frame body 6a, and the right shaft support portion 25c provided on the frame body 6a is provided across the rear side frame 6b and the right rear threshing wall 7e. The support frame 1a is provided with an axle 28a and the right threshing wall 7c is provided with a bearing 28. Since the bearing 28 is supported by the shaft 28a, the right rear threshing wall 7e is supported by the support frame 1a so as to be rotatable about the vertical axis of the shaft 28a. Therefore, the frame body 6a and the sheave case 6 rotate integrally with the right rear threshing wall 7e around the vertical axis of the support frame 1a. Note that the bearings 28 are provided at two locations, the upper portion of the sheave case 6 and the side portion of the swing drive shaft 33 . Further, the front end portion of the right rear threshing wall 7e corresponding to the boundary portion with the right threshing wall 7c is formed in a planar shape having a width in the left-right direction of the machine body. Therefore, in the housed state, the right threshing wall 7c is in contact with the right rear threshing wall 7e at its planar portion, so that the threshing device 7 can be tightly sealed in the housed state.

In this manner, the sheave case 6 rotates integrally with the upper side wall 25a of the frame body 6a around the vertical axis of the support frame 1a, whereby the storage state ( 3) and a protruded state (state shown in FIG. 6) in which it is pulled out so as to protrude from the body (selecting section 5). When the sheave case 6 is displaced from the retracted state to the projecting state, the sheave case 6 rotates about the vertical axis of the right side portion of the rear region in the direction in which the front region separates from the machine body (selecting section 5). A holder 37 is provided to hold the sheave case 6 in the stored state. The retainer 37 is a buckle provided in the front end region of the sheave case 6, and retains the sheave case 6 in the stored state by retaining the upper side wall 25a to the front side threshing wall 7d.

As described above, in the projecting state, the sheave case 6 is supported by the frame body 6a, and the frame body 6a is supported by the right rear threshing wall 7e. Furthermore, in the housed state, the upper side wall 25a is placed and supported by the lower side wall 25b. Therefore, in the housed state, the sheave case 6 is supported by the lower side wall 25b (side wall 25) and the right rear threshing wall 7e (right threshing wall 7c) via the frame body 6a.

When the sheave case 6 is displaced to the projected state, that is, when the sheave case 6 is pulled out from the airframe (selecting section 5), the following procedure is performed. First, the belt 33b is removed from the pulley 33a, and then the retainer 37 is released. The upper side wall 25a is then separated from the lower side wall 25b. In this state, the sheave case 6 is rotated, and the sheave case 6 is pulled out from the machine body (sorting section 5). The sieve case 6 is pulled out from the threshing device 7 through the opening, which is the area where the upper side wall 25a above the lower side wall 25b was arranged.

At the boundary between the upper side wall 25a and the lower side wall 25b, the upper side wall 25a and the lower side wall 25b each have an inclined portion 25d. That is, inclined portions 25d are provided at the lower end portion of the upper side wall 25a and the upper end portions of the lower side wall 25b, respectively. 25a is placed and supported on the lower side wall 25b.

In addition, the inclined portion 25d is inclined rearwardly and downwardly. The upper side wall 25a and the lower side wall 25b are brought into contact with each other at the inclined portion 25d, and the upper side wall 25a is placed on the lower side wall 25b. are in close contact with each other, and the upper side wall 25a is efficiently placed and supported on the lower side wall 25b. Further, the sheave case 6 and the upper side wall 25a are prevented from shifting forward against the inclination, the load is easily applied to the rocking drive shaft 33 side, and the front portion of the sheave case 6 is prevented from sagging.

In this way, the sheave case 6 can be rotated to be laterally pulled out or retracted from the airframe (sorting section 5) while the sheave case 6 is supported at one point. 6 is not required to be taken out from the rear part of the machine body, and a jig or the like for taking it out is unnecessary. Therefore, the sheave case 6 can be easily displaced to the projecting state, maintenance such as cleaning and repair of the sheave case 6 can be easily performed, and the sheave case 6 can be easily returned to the retracted state after the maintenance.

[Maintenance of No. 2 collection part]
As described above, the sheave case 6 can be rotated and pulled out from the machine body (sorting section 5), thereby facilitating maintenance. The first recovery section 23 and the second recovery section 24 of the sorting section 5 are located on the right side of the sheave case 6 (inside the machine body), and maintenance cannot be easily performed even if the sheave case 6 is pulled out. Therefore, the grain tank 8 is rotated to the outside (right side) of the machine body to provide a space on the right lateral side of the sorting unit 5 (threshing device 7), and the operator can move the first recovery unit 23 and the second recovery unit 23 from the space. Maintenance of the number collection unit 24 is performed. Further, the second collecting section 24 is provided with an opening/closing section 24a for maintenance, as will be described later with reference to FIGS. During maintenance, the opening/closing portion 24a is opened and the inside of the second collection portion 24 is maintained.

As shown in FIGS. 1 and 7, the grain tank 8 rotates around the axis of a case portion 10a in which a conveyor (not shown) of the grain discharging device 10 is provided. Specifically, the grain tank 8 is fixed to the connecting portion 10b that rotates along the circumference of the case portion 10a, and the grain tank 8 moves along the axis of the case portion 10a as the connecting portion 10b rotates. Rotate around. By rotating the grain tank 8 to the outside of the machine body, a space is formed between the sorting unit 5 (threshing device 7) and the grain tank 8, and the operator enters this space and moves to the first recovery unit. 23 and the second collection unit 24 are maintained.

At this time, since the first recovery section 23 is located on the front side of the machine body, which is the free end side of the grain tank 8, from the second recovery section 24, a sufficient space as a work area is ensured. However, since the second recovery section 24 is close to the rotation base end of the grain tank 8 and has a narrow space, it is difficult to secure a sufficient space for maintenance. Therefore, measures are taken to facilitate maintenance of the second collecting section 24, which cannot be said to have sufficient work space.

Specifically, as shown in FIGS. 8 and 9 , the second recovery section 24 is a laterally protruding portion that protrudes from the right side surface of the sorting section 5 toward the grain tank 8 (toward the right side of the left-to-right direction of the machine body). It has a transport section 24b and an upward lifting section 24c. A conveying device (not shown) such as a screw for conveying unprocessed materials to the sorting unit 5 is provided inside the horizontal conveying unit 24b and the lifting unit 24c. An opening/closing portion 24a is provided in the horizontal conveying portion 24b of the second collection portion 24, and maintenance such as cleaning and repair of the inside of the second collection portion 24 is performed by opening the opening/closing portion 24a.

The opening/closing part 24a is provided in a form that covers an opening (not shown) provided from the upper area to the rear side area of the horizontal conveying part 24b. Hereinafter, in the opening/closing portion 24a and the opening, the end portion of the upper region is referred to as the upper end portion, and the end portion of the rear side region, which is the end portion opposite to the upper end portion, is referred to as the lower end portion. The opening/closing part 24a swings around the left-right axis of the machine body at the lower end, and opens and closes in such a manner that the upper end moves away from and approaches the horizontal conveying part 24b.

The opening/closing portion 24a is provided with a hinge 24d at one end in the direction along the circumference of the horizontal conveying portion 24b, and a holding portion 24e at the other end for holding the opening/closing portion 24a in a closed state. In the opening/closing portion 24a, the hinge 24d is provided at the lower end portion of the opening/closing portion 24a, and the holding portion 24e is provided at the upper end portion of the opening/closing portion 24a.

The hinge 24d is fixed to the lower end portion of the opening/closing portion 24a and the horizontal conveying portion 24b, and has a shaft 24f extending in the lateral direction of the machine body. A portion of the hinge 24d fixed to the opening/closing portion 24a and a portion of the hinge 24d fixed to the horizontal conveying portion 24b are configured to be relatively swingable around the shaft 24f, and these fixed portions swing. As a result, the opening/closing portion 24a opens and closes with respect to the horizontal conveying portion 24b. The hinge 24d is provided with a torsion coil spring 24g across a portion where the hinge 24d is fixed to the opening/closing portion 24a and a portion where the hinge 24d is fixed to the horizontal conveying portion 24b. energize.

The holding portion 24e includes a pin 24h provided on the right side portion of the horizontal conveying portion 24b and a hook 24i provided on the upper end portion of the opening/closing portion 24a. The opening/closing portion 24a in the state is held by the horizontal conveying portion 24b. The hook 24i swings around an axis provided on the opening/closing portion 24a extending in the left-right direction of the machine body, engages with the pin 24h to hold the opening/closing portion 24a in the closed state, and moves away from the pin 24h to close the opening/closing portion 24a. Allow opening and closing. Even when the hook 24i is separated from the pin 24h, the torsion coil spring 24g urges the opening/closing portion 24a in the closing direction.

With such a configuration, the second recovery section 24 is configured such that, with the grain tank 8 (see FIG. 1) open, the engagement between the hook 24i and the pin 24h is disengaged to open the opening/closing section 24a for internal maintenance. is done. Therefore, even if a sufficient space for maintenance is not secured, the opening/closing portion 24a of the second collecting portion 24 can be easily opened and closed, and the work efficiency of maintenance is improved.

An operation to disengage the hook 24i and the pin 24h from the outside of the machine body, instead of disengaging the hook 24i and the pin 24h in the space between the sorting unit 5 (threshing device 7) and the grain tank 8 (see FIG. 1). can be performed, the operability will be further improved. Therefore, as shown in FIGS. 3, 5, and 8 to 10, an operation tool 38 for engaging the hook 24i and the pin 24h and disengaging the hook 24i and the pin 24h is mounted on the airframe. It is preferably provided on the outside.

The operation tool 38 is provided on the left side surface of the sorting section 5 . The manipulator 38 is provided in the lower region of the holder 37 at the front end of the lower side wall 25 b of the sorting section 5 .

The operation tool 38 is a lever-like member, and swings along the axis of a vertical shaft 38a provided in the middle portion of the operation tool 38, substantially in the center. When one end of the operating tool 38 is swung, the other end is swung in the opposite direction.

Further, the operating tool 38 has a wire 38b connected to the hook 24i provided on the opening/closing portion 24a of the second collecting portion 24 at the other end portion. When the operating tool 38 is swung, the wire 38b is pulled or returned according to its direction. The wire 38b is supported behind the second collection portion 24 and extends from the operating tool 38 to the hook 24i of the opening/closing portion 24a via that portion.

A hook 24i provided on the opening/closing portion 24a swings as the wire 38b moves as the operation tool 38 is operated. Since the wire 38b is connected to the hook 24i via the rear side of the second recovery portion 24, when the operation tool 38 is swung and the wire 38b is pulled, the hook 24i swings rearward. Also, the hook 24i is biased by a coil spring 24j in the direction of engagement with the pin 24h. The coil spring 24j has one end fixed to the hook 24i and the other end fixed to the opening/closing portion 24a.

With the above configuration, when the operation tool 38 is operated and the wire 38b is pulled, the engagement between the hook 24i and the pin 24h is released. Hook 24i moves toward engagement with pin 24h. When the wire 38b is further pulled, the opening/closing portion 24a is pulled via the hook 24i, thereby opening the opening/closing portion 24a.

With such a configuration, instead of performing an operation to disengage the hook 24i and the pin 24h in the space between the sorting unit 5 (threshing device 7) and the grain tank 8 (see FIG. 1), the sorting unit 5, the engagement between the hook 24i and the pin 24h is disengaged and the closed state of the opening/closing portion 24a by the holding portion 24e is released by simply operating the operating tool 38 provided on the left side (outside of the body). , the opening/closing portion 24a can be opened. As a result, the opening/closing portion 24a can be opened more easily, and maintenance of the second collection portion 24 can be performed efficiently.

[Another embodiment]
(1) The shaft 28a for rotating the sheave case 6 is not limited to being fixed to the support frame 1a, and may be provided on the right lateral side of the rear region of the sheave case 6 in any configuration. Further, the shaft 28a may be provided at any position other than the right side portion of the rear region of the sheave case 6 as long as the sheave case 6 can be rotated in a direction protruding from the machine body (sorting section 5). Moreover, the bearings 28 are provided at one or three or more locations on the upper portion of the sheave case 6 and the side portion of the swing drive shaft 33 . Further, the support frame 1a may be provided in contact with the right threshing wall 7c, or may be supported by the right threshing wall 7c in a projecting manner from the right threshing wall 7c. Further, the support frame 1a may be supported not only by the right threshing wall 7c but also by the grain tank 8 or the body frame 1.

(2) In each of the above-described embodiments, the right shaft support portion 25c of the swing drive shaft 33 is provided across the rear side frame 6b and the right rear threshing wall 7e. The right shaft support portion 25c may be configured to be supported by either the rear side frame 6b or the right rear threshing wall 7e. That is, the swing drive shaft 33 may be configured to be supported across the back side frame 6b or the right rear threshing wall 7e and the upper side wall 25a.

(3) In each of the above-described embodiments, the upper side wall 25a and the lower side wall 25b may not have the inclined portion 25d at the boundary between the upper side wall 25a and the lower side wall 25b.

(4) In each of the above-described embodiments, the sheave case 6 in the housed state is not limited to being placed and supported on the lower side wall 25b via the upper side wall 25a. It may be supported by the configuration of Further, the sheave case 6 is not limited to a structure that rotates integrally with the upper side wall 25a, and may rotate separately from the upper side wall 25a. Alternatively, at least one of the upper side wall 25a and the lower side wall 25b may be omitted.

(5) In each of the above embodiments, the opening/closing portion 24a is provided from the upper region to the rear side region of the horizontal conveying portion 24b. may be provided at the position of Further, the wire 38b is not limited to the structure passing through the rear side of the second recovery portion 24, and any structure is possible as long as the wire 38b can be pulled in the direction to open the opening/closing portion 24a. For example, when the hook 24i is behind the hinge 24d in the opening/closing portion 24a, the wire 38b may be pulled from the front to the rear. Furthermore, the operation tool 38 can be configured such that by pulling the wire 38b, the hook 24i is simply disengaged without opening the opening/closing portion 24a.

(6) In each of the above embodiments, the opening/closing portion 24a of the second collecting portion 24 is provided in the horizontal conveying portion 24b, but may be provided in the lifting portion 24c. may be provided in both. Furthermore, it may be provided in the first recovery section 23 .

(7) In each of the above-described embodiments, the operation tool 38 is not limited to the area below the holding tool 37 at the front end of the lower side wall 25b of the sorting section 5, but is located on the left lateral side of the sheave case 6. may be provided at any position in the vicinity of . Moreover, the operation tool 38 does not necessarily have to be provided. When the operation tool 38 is not provided, the holding part 24e is operated from the space between the sorting part 5 (threshing device 7) and the grain tank 8 (see FIG. 1). Further, the holding member 37 is not limited to a buckle, and may have any structure as long as it can hold the sheave case 6 in the stored state.

(8) In each of the above embodiments, the threshing device 7 and the grain tank 8 are arranged side by side. can be arranged in relation to In addition, instead of the grain tank 8, a grain storage part such as a hopper may be provided.

INDUSTRIAL APPLICABILITY The present invention can be applied to a threshing apparatus for threshing and sorting crops. Moreover, as long as it has such a threshing device, it can be applied not only to a self-threshing combine, but also to various types of combine such as a normal combine.

1a support frame 5 sorting section 6 sieve case 6a frame body 6b rear side frame (opposite side portion)
6c arm portion 7 threshing device 7a threshing portion 7c right threshing wall (other side wall portion)
25 side wall (outer wall)
25a upper side wall (first part)
25b lower side wall (second part)
25c shaft supporting portion 25d inclined portion 33 rocking drive shaft

Claims (8)

a threshing unit for threshing the crops;
a sorting unit provided below the threshing unit for sorting threshed products threshed by the threshing unit;
and an outer wall portion provided laterally outward of the threshing portion and the sorting portion,
The sorting unit is provided with a sieve case that is driven to swing along the outer wall and sorts the threshed material,
A first portion of the outer wall portion facing the lateral outer portion of the sheave case is configured to be separable from the other second portion of the outer wall portion, and the first portion is separated from the second portion of the outer wall portion. configured to form an opening in the outer wall by cutting from the portion;
The sheave case is rotatably supported about a vertically oriented vertical axis, and can be pulled out to the outside of the apparatus through the opening through the outer wall portion by rotating about the vertical axis. Some threshing equipment. The first portion is configured to be rotatable around the vertical axis,
The threshing apparatus according to claim 1, wherein the sheave case and the first portion are connected to each other and integrally rotatable about the vertical axis. a frame body provided so as to surround the sheave case;
a support frame that supports the frame body so as to be rotatable around the vertical axis;
The first portion is a portion of the frame body that faces the lateral outer portion,
The threshing apparatus according to claim 2, wherein the sheave case is swingably supported by the frame body. The frame body includes the first portion and an opposite side portion located on the opposite side of the first portion with the sheave case interposed therebetween,
Left and right arm portions are provided for suspending the left and right side portions of the front portion of the sheave case from the first portion and the opposite side portion, respectively, so as to be capable of swinging back and forth around a horizontal horizontal axis. Item 3. A threshing device according to Item 3. The other side wall portion is provided on the opposite side of the outer wall portion with the threshing portion and the sorting portion interposed therebetween,
Both end portions of a swing drive shaft for swinging the sheave case are rotatably supported by the outer wall portion and the other side wall portion,
3. A shaft supporting portion of said other side wall portion for supporting said swing drive shaft and said swing drive shaft are integrally rotatable about said vertical axis together with said sheave case and said first portion. The threshing device according to any one of 2 to 4. The second portion is positioned below the first portion,
The threshing apparatus according to any one of claims 1 to 5, wherein the first portion is placed and supported on the upper end portion of the second portion in a state where the sieve case is accommodated inside the sorting section. The threshing device according to claim 6, wherein a boundary portion between the first portion and the second portion is provided with an inclined portion that descends toward the vertical axis in a side view. A combine comprising the threshing device according to any one of claims 1 to 7,
A grain storage unit is provided in parallel with the threshing device and stores grains threshed and sorted by the threshing device,
A combine harvester in which the vertical axis is set in a horizontal side portion of the sieve case on the side of the grain storage section.

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