JP7282058B2 - Self-throwing combine harvester - Google Patents

Description

The present invention relates to a self-threshing combine harvester.

BACKGROUND ART Conventionally, as a self-threshing combine harvester, for example, a self-threshing combine harvester described in Patent Document 1 is known. The self-threshing combine harvester described in Patent Document 1 includes a threshing device ("threshing device [5]" in the document) for threshing harvested grain culms, and a threshing device [5] provided in front of the threshing device to threw a plurality of planted grain culms. A reaping part (“reaping part [2]” in the document) that reaps and joins the harvested grain culms and conveys them toward the thresher is provided. The harvesting unit includes a downstream conveying device ("supply conveying device [19]" in the literature) that conveys the plurality of joined harvested grain culms downstream in the conveying direction from the junction where the plurality of grain harvested culms join. ) are provided. The downstream conveying device is provided with an endless rotating body and a guide member provided facing the endless rotating body for guiding the harvested grain culms.

JP 2014-97036 A

In the self-threshing combine harvester described in Patent Document 1, a large amount of harvested grain culms are concentrated on the downstream conveying device. Therefore, in the downstream conveying device, the harvested culms tend to clog between the endless rotating body and the guide member. In the downstream conveying device, if the grain culms are stuck between the endless rotating body and the guide member, it is difficult to remove the jammed grain culms.

In view of the above situation, there is a demand for a self-throwing combine that can easily remove harvested grain culms stuck between the endless rotating body and the guide member in the downstream conveying device.

A feature of the present invention is a threshing device for threshing harvested grain culms, and a threshing device provided in front of the threshing device that cuts a plurality of planted grain culms, merges the harvested grain culms, and conveys them toward the threshing device. a reaping part, the reaping part having a downstream conveying device for conveying the joined multiple grain harvested culms on the downstream side in the conveying direction of the junction where the multiple grain harvested culms join. The downstream conveying device is configured such that the portion on the conveying path side that conveys the harvested culms is positioned outside the machine body, and the portion on the return path side that does not convey the harvested culms is positioned inside the machine body. and a guide member provided opposite to a portion of the endless rotating body on the conveying path side for guiding the harvested grain culm, wherein the guide member approaches the endless rotating body. The supply frame is configured to be switchable between a use state and a separated state away from the endless rotating body, and the reaping portion extends along the front-rear direction of the machine body in a plan view, and supports the guide member. The supply frame has a support portion that supports the front end portion of the supply frame as a fulcrum, and the position inside the machine body where the guide member is in the use state and the position outside the machine body where the guide member is in the separated state. position, and can be bent at the front-rear intermediate portion .

According to this characteristic configuration, the distance between the endless rotating body and the guide member is widened by switching the guide member to the spaced state. As a result, the harvested culms stuck between the endless rotating body and the guide member can be easily removed in the downstream conveying device.
Further, when the supply frame swings between the position inside the machine body and the position outside the machine body with the support portion as a fulcrum, the space between the endless rotating body and the guide member widens in the left-right direction. As a result, harvested grain culms clogged between the endless rotating body and the guide member can be easily removed in the feeding and conveying device.
Furthermore, when the supply frame is bent at the front-rear intermediate portion, the interval between the endless rotating body and the guide member becomes wider in the left-right direction. This makes it possible to more easily remove harvested grain culms stuck between the endless rotating body and the guide member in the feeding and conveying device.

Another feature of the present invention is a threshing device for threshing harvested grain culms, and a threshing device provided in front of the threshing device, which cuts a plurality of planted grain culms, joins the harvested grain culms, and directs the harvested grain culms toward the threshing device. a reaping unit for transporting, wherein the reaping unit is downstream in the transport direction from the junction where the multiple grain harvested culms join; and the downstream conveying device has a portion on the conveying path side for conveying the harvested culms located outside the machine body and a portion on the return path side not conveying the harvested culms located inside the machine body. and a guide member provided opposite to a portion of the endless rotating body on the conveying path side for guiding harvested grain culms, wherein the guide member is the endless rotating body and a separated state away from the endless rotating body. The reaper has a feed chain, and the reaper is disposed on the upstream side in the transport direction with respect to the feed chain as the downstream transport device, and nips and transports the stems of a plurality of joined harvested grain culms to transport the culms to the feed. It has a supply and transport device that supplies to the chain, the supply and transport device has a supply guide that guides the base of the harvested grain culm as the guide member, and the reaping part extends along the longitudinal direction of the machine body in plan view. and a supply frame that supports the supply guide, and the supply frame has a support portion that supports a front end portion of the supply frame as a fulcrum, and the supply guide is in the use state inside the machine body. and the position outside the fuselage where the supply guide is in the separated state, and can be bent at the front-rear intermediate portion.

According to this characteristic configuration, the distance between the endless rotating body and the guide member is widened by switching the guide member to the spaced state. As a result, the harvested culms stuck between the endless rotating body and the guide member can be easily removed in the downstream conveying device.
In addition, in the supply/conveying device, by switching the supply guide to the separated state, the interval between the endless rotating body and the supply guide is widened. As a result, harvested grain culms clogged between the endless rotating body and the supply guide can be easily removed in the supply/conveyance device.
Further, when the supply frame swings between the position inside the machine body and the position outside the machine body with the supporting portion as a fulcrum, the space between the endless rotating body and the guide member widens in the left-right direction. As a result, harvested grain culms clogged between the endless rotating body and the supply guide can be easily removed in the supply/conveyance device.
When the supply frame is bent at the front-rear intermediate portion, the interval between the endless rotating body and the guide member becomes wider in the left-right direction. This makes it possible to more easily remove harvested grain culms stuck between the endless rotating body and the supply guide in the supply and transport device.

Further, in the present invention, the reaping unit includes an endless rotating conveying device configured separately from the downstream conveying device for conveying harvested grain culms, and an endless rotating conveying device connected to the supply frame so as to be able to swing integrally. a conveying frame for supporting the endless rotating body of the dynamic conveying device; and a tension mechanism for applying tension to the endless rotating body of the endless rotating conveying device, wherein the tension mechanism is the endless rotating conveying device. It is preferable to switch between a tension applying state in which tension is applied to the endless rotating body and a tension release state in which tension is released from the endless rotating body of the endless rotating conveying device.

According to this characteristic configuration, when the tension mechanism is switched to the tension released state, the tension of the endless rotating body of the endless rotating conveying device is loosened. As a result, when the supply frame is swung integrally with the transfer frame, the supply frame can be largely swung without being restricted by the endless rotary body of the endless rotary transfer device.

Further, in the present invention, there is provided a lock mechanism capable of switching between a locked state in which the supply frame is fixed in a state in which the supply guide is used and an unlocked state in which the fixed position of the supply frame is released. and is suitable.

According to this characteristic configuration, the supply guide can be stably held in the use state by switching the lock mechanism to the locked state when performing normal reaping work. When removing the clogged harvested culms, the supply guide can be easily switched to the separated state by switching the lock mechanism to the unlocked state.

Further, in the present invention, the reaping unit has, as the downstream conveying device, a tip conveying device that holds and conveys the tips of a plurality of joined harvested grain culms, and the tip conveying device serves as the guide member. It is preferable to have a tip guide for guiding the tip of the reaping grain culm.

According to this characteristic configuration, in the tip conveying device, the interval between the endless rotating body and the tip guide is widened by switching the tip guide to the separated state. As a result, harvested grain culms clogged between the endless rotating body and the tip guide can be easily removed in the tip conveying device.

Furthermore, in the present invention, it is preferable that the tip guide is supported by the supply frame.

According to this characteristic configuration, by using the supply frame as a member for supporting the tip guide, there is no need to provide a dedicated member for supporting the tip guide.

Furthermore, in the present invention, it is preferable that the tip guide is supported only by the supply frame.

According to this characteristic configuration, even if the tip guide swings integrally with the supply frame, the movement of the tip guide is not hindered.

It is a left view which shows a combine. It is a top view which shows a reaping part. It is a left view which shows a reaping part. It is a top view which shows a left stock base conveying apparatus, a raking packer, and these peripheral structures. FIG. 4 is a plan view showing a state in which the tension mechanism is switched to a tension released state; FIG. 4 is a plan view showing a state in which the supply frame is positioned inside the machine body; FIG. 4 is a rear view showing a state in which the supply frame is positioned inside the machine body; FIG. 11 is a rear view showing a state in which the rear frame portion has swung to the outside of the fuselage; FIG. 4 is a plan view showing a state in which the supply frame is positioned outside the machine body; FIG. 10 is a plan view showing a state in which the supply frame is positioned outside the body, and is a plan view showing a state in which the rear frame portion has swung toward the outside of the body; It is a top view which shows a pressing device. It is a perspective view which shows a pressing device. FIG. 4 is a plan view showing the pressing device, showing a state in which the spring is held in a predetermined contracted state by the spring holding mechanism;

A mode for carrying out the present invention will be described based on the drawings. In the following description, the direction of arrow F (see FIGS. 1 and 2) is the "front of the fuselage", the direction of arrow B (see FIGS. 1 and 2) is the "rear of the fuselage", and the direction of arrow L (see FIG. 2) is ) is the “left side of the aircraft”, and the direction of the arrow R (see FIG. 2) is the “right side of the aircraft”.

[Overall configuration of combine harvester]
FIG. 1 shows a self-threshing combine. The combine is provided with a traveling machine body 1. - 特許庁A traveling machine body 1 is provided with a crawler type traveling device 2 and a body frame 3 supported by the traveling device 2 . A reaping unit 4 is provided in front of the traveling machine body 1 for reaping planted grain culms and conveying the harvested grain culms toward the rear of the machine body. A driving unit 5 is provided on the right side of the front part of the traveling machine body 1 . An engine E is provided below the operating section 5 .

A threshing device 6 for threshing the harvested grain culms is provided behind the harvesting unit 4 . That is, the harvesting part 4 is provided in front of the threshing device 6 . A feed chain 7 is provided on the left side of the threshing device 6 for holding and conveying the base of the harvested grain culms. A grain storage tank 8 for storing grains after threshing is provided on the right side of the threshing device 6 . The grain storage tank 8 is connected with a grain discharge device 9 for discharging the grains in the grain storage tank 8 .

[Reaping part]
As shown in FIGS. 1 and 2 , the harvesting unit 4 harvests a plurality of rows (six rows in this embodiment) of planted grain culms, merges the harvested grain culms, and conveys them toward the threshing device 6 . It is configured. The reaping part 4 has a reaping position (lowered position) in which the reaping work of planted grain culms is performed and a non-reaping position in which no reaping work of the planted grain culms is performed. It is configured to be swingable between a working position (raised position). The reaping unit 4 includes a plurality of (seven in this embodiment) dividing tools 10 for dividing the planted grain culms, and a plurality of (six in this embodiment) raising devices for raising the planted grain culms. 11, a plurality of (six in this embodiment) raking belts 12 for raking the base of the planted grain culm, a cutting blade device 13 for cutting the planted grain culm, and the base of the harvested grain culm. A plurality (six in this embodiment) of raking packers 14 for raking, a conveying device 15 for conveying harvested grain culms toward the rear of the machine body, and a harvesting frame 16 for supporting these are provided.

According to such a configuration, the planted grain culms in the field are divided by the dividing tool 10 , and the planted grain culms divided by the dividing tool 10 are raised by the lifting device 11 . The planted culm raised by the raising device 11 is raked by the raking belt 12 , and the planted culm raked by the raking belt 12 is cut by the cutting blade device 13 . The harvested grain culms cut by the cutting blade device 13 are raked up by the raking packer 14, and the harvested grain culms raked up by the raking packer 14 are conveyed toward the rear of the machine body by the conveying device 15. Become.

[Conveyor]
As shown in FIG. 2, the conveying device 15 includes a left conveying device 17, a middle conveying device 18, a right conveying device 19, a depth conveying device 20, and a supply conveying device 21 (a "downstream device" according to the present invention). (corresponding to "side transport device" and "supply transport device").

The left conveying device 17 is configured to convey two rows of harvested culms on the left side. The left conveying device 17 includes a left stock base conveying device 22 (corresponding to an “endless rotating conveying device” according to the present invention) and a left tip conveying device 23 .

The left stem base conveying device 22 is configured to pinch and convey the stem bases of the left two rows of harvested grain culms. The left stalk conveying device 22 includes a left stalk chain 22A (corresponding to an "endless rotating body" according to the present invention) with projections, and a left stalk chain 22A provided facing the left stalk chain 22A. and a driving sprocket 22C, a driven sprocket 22D and rollers 22E, 22F, 22G, etc. on which the left stock chain 22A is wound. The stems of harvested grain culms are pinched and conveyed by the left stem root chain 22A and the left stem root guide 22B.

The left tip conveying device 23 is configured to hold and convey the tips of the left two rows of harvested grain culms. The left tip conveying device 23 is arranged above the left root conveying device 22 . The left tip conveying device 23 includes a left tip chain 23A, a plurality of pawls 23B attached to the left tip chain 23A and engaging the tips of harvested grain culms, a drive sprocket 23C around which the left tip chain 23A is wound, and the like. , are provided.

The left ear tip conveying device 23 assumes a standing posture in which the claw 23B stands up against the left ear tip chain 23A in the portion of the left ear tip chain 23A on the transport route R1 side for transporting the harvested grain culm, and the left ear tip chain 23A is reaped. In the portion on the return route R2 side where the culm is not conveyed, the claw 23B is configured to be in a laid down posture with respect to the left tip chain 23A.

The intermediate conveying device 18 is configured to convey two streaks of harvested culms on the central side. The middle conveying device 18 includes a middle stock base conveying device 24 and a middle ear tip conveying device 25 .

The medium stock base conveying device 24 is configured to clamp and convey the stock base of two streaks of harvested grain culms on the central side. The medium stock transfer device 24 includes a medium stock chain 24A with projections, a medium stock base guide 24B which is provided facing the medium stock chain 24A and guides the stock of harvested grain culms, and a medium stock base. and a drive sprocket 24C around which the chain 24A is wound. The base of the reaping grain culm is pinched and conveyed by the medium stock base chain 24A and the medium stock base guide 24B.

The middle tip conveying device 25 is configured to hold and convey the tips of the harvested grain culms of the two rows on the central side. The middle ear tip conveying device 25 is arranged above the middle stock base conveying device 24 . The middle-breast conveying device 25 includes a middle-breast chain 25A, a plurality of pawls 25B attached to the middle-breast chain 25A and acting to engage the tips of harvested grain culms, and a driving sprocket 25C around which the middle-breast chain 25A is wound. is provided.

The middle tip conveying device 25 takes a standing posture in which the claw 25B stands up against the middle tip chain 25A in the part of the middle tip chain 25A on the side of the conveying route R1 that conveys the harvested grain culm, and the middle tip chain 25A is reaping. In the portion on the return route R2 side where the grain culm is not conveyed, the claw 25B is configured to be in a laid down posture with respect to the middle tip chain 25A.

The right conveying device 19 is configured to convey two rows of harvested culms on the right side. The right conveying device 19 includes a right root conveying device 26 and a right tip conveying device 27 (corresponding to a "downstream conveying device" and a "tip conveying device" according to the present invention).

The right stem base conveying device 26 is configured to pinch and convey the stem bases of the right two rows of harvested grain culms. The right stalk base conveying device 26 is provided with a right stalk base chain 26A with projections, and a right stalk base guide 26B which is provided facing the right stalk base chain 26A and guides the base of the reaping grain culms. ing. The stem of the harvested grain culm is pinched and conveyed by the right stem root chain 26A and the right stem root guide 26B.

The right tip conveying device 27 is configured to hold and convey the tips of the right two rows of harvested grain culms. The right tip conveying device 27 is arranged above the right root conveying device 26 . The right ear tip conveying device 27 includes a right ear tip chain 27A (corresponding to the "endless rotating body" according to the present invention), and a plurality of claws 27B attached to the right ear tip chain 27A and engaging with the tip of the harvested grain culm. , a right tip guide 27D (corresponding to the "guide member" and "tip guide" according to the present invention, see FIG. 6) provided opposite to the right tip chain 27A and guiding the tip of the harvested grain culm, and the right tip chain A drive sprocket 27C, etc. on which 27A is wound is provided.

The right ear tip conveying device 27 assumes a standing posture in which the claw 27B stands up against the right ear tip chain 27A in the portion of the right ear tip chain 27A on the transport route R1 side for transporting the harvested grain culms, and the right ear tip chain 27A is reaped. In the portion on the return route R2 side where the culm is not conveyed, the claw 27B is configured to be in a laid down posture with respect to the right tip chain 27A. In the right tip chain 27A, the rear portion of the portion on the transport route R1 side that transports the harvested culms is located outside (left side) of the machine body, and the rear portion of the portion on the return route R2 side that does not transport the harvested culms is located inside the machine body (right side). is configured to be located in

The threshing depth conveying device 20 is configured to receive the stems of harvested grain culms from the left stem root transporting device 22, the middle stem root transporting device 24, and the right stem root transporting device 26, and hold and transport them. The threshing depth conveying device 20 is configured to be vertically swingable at the front fulcrum. The threshing depth is adjusted by vertically swinging the threshing depth conveying device 20 at the front fulcrum.

The threshing depth conveying device 20 is provided with a threshing depth chain 20A having projections and a threshing depth guide 20B provided facing the threshing depth chain 20A and guiding the base of the harvested grain culms. ing. The base of the harvested grain culm is pinched and conveyed by the threshing depth chain 20A and the threshing depth guide 20B.

The feeding and conveying device 21 is configured to receive the base of the reaping grain culms from the threshing depth conveying device 20 and hold and convey them. The supply transport device 21 is arranged on the upstream side in the transport direction with respect to the feed chain 7 . The supply conveying device 21 is arranged below the rear portion of the right tip conveying device 27 . That is, the right tip conveying device 27 is arranged above the supply conveying device 21 .

The supply conveying device 21 includes a supply chain 21A (corresponding to the "endless rotating body" according to the present invention) with projections, and a supply guide 21B which is provided facing the supply chain 21A and guides the base of the harvested grain culms. (corresponding to the "guide member" and "supply guide" according to the present invention), and the drive sprocket 21C around which the supply chain 21A is wound. The roots of harvested grain culms are pinched and conveyed by the supply chain 21A and the supply guide 21B. In the supply chain 21A, the part on the transport route R1 side that transports the harvested culms is located outside (left side) of the machine body, and the part on the return path R2 side that does not transport the harvested culms is located inside the machine body (right side). is configured as

According to such a configuration, the tips of the left two grain harvested culms held and conveyed by the left ear tip conveying device 23, the central two rows of harvested grain culms held and conveyed by the middle ear tip conveying device 25, and The tips of the two grain harvested culms on the right side that have been retained and transported by the right ear tip conveying device 27 join, and the tips of the merged grain harvested culms (the tips of the six grain harvested culms) are retained and transported by the right ear tip conveying device 27. and supplied to a threshing chamber (not shown) of the threshing device 6.

In addition, the base of the left two streaks of harvested grain culms pinched and conveyed by the left stump base conveying device 22, the stump base of the two central streaks of harvested grain culms pinched and conveyed by the middle stump base conveying device 24, and the right stump base conveyance. The stems of the right two grain harvested culms pinched and conveyed by the device 26 join, and the merged stems of the harvested grain culms (six roots of the harvested grain culms) are conveyed by the threshing depth conveying device 20 and the supply conveying device. 21, and finally supplied to the feed chain 7 by the supply/conveyance device 21. As shown in FIG.

Here, in FIG. 2, J indicates a junction where six harvested grain culms join. The feeding and conveying device 21 is configured to pinch and convey the stems of the six reaping grain culms that have joined on the downstream side of the confluence J in the conveying direction. The right ear tip conveying device 27 is configured to hold and convey the tips of the six joined harvested grain culms at the downstream side of the confluence J in the conveying direction.

[Reaping frame]
As shown in FIGS. 3 and 4 , the reaping frame 16 includes a weed dividing frame 28 , a reaping shaft case 29 , a reaping drive case 30 , and a raising drive shaft case 31 .

A plurality (seven in this embodiment) of the weed dividing frames 28 are provided corresponding to each of the plurality (seven in this embodiment) of the weed dividing tools 10 so as to support the weed dividing tools 10. there is The reaping shaft case 29 is configured to be swingable around a swing axis X1 (see FIG. 1). The reaping drive case 30 is connected to the front end portion of the reaping shaft case 29 so as to extend along the left-right direction of the machine body. The raising drive shaft case 31 is erected at the left end of the reaping drive case 30 . Inside the reaping shaft case 29, the reaping drive case 30, and the raising drive shaft case 31, shafts (not shown) for transmitting power to each part of the reaping unit 4 are provided.

[Tension mechanism]
As shown in FIG. 4, a tension mechanism 32 is provided to apply tension to the left stock root chain 22A. The tension mechanism 32 is configured to be switchable between a tension applying state (see FIG. 4) in which tension is applied to the left stock base chain 22A and a tension release state (see FIG. 5) in which tension is removed from the left stock base chain 22A. It is

The tension mechanism 32 includes a tension roller 33 that contacts the left stock chain 22A, and a tension roller 33 that can swing around a swing axis Z1 that is the same as the rotation axis of the driven sprocket 22D, so that the tension roller 33 can rotate. A tension arm 34 that supports the tension arm 34, a spring 35 that urges the tension arm 34 to swing about the swing axis Z1 in the direction in which the tension roller 33 contacts the left stock base chain 22A (tension application direction), and the tension arm 34. An operation lever 36 for swing operation is provided.

The tension arm 34 includes a first arm portion 34A to which the tension roller 33 is attached and a second arm portion 34B to which the spring 35 is attached. The end of the spring 35 on the side of the second arm portion 34B is connected to the second arm portion 34B. The end of the spring 35 opposite to the second arm portion 34B is connected to the rod 37 .

The rod 37 is attached to the stay 38 so that its position can be changed. The stay 38 is swingably supported by the operation lever 36 . By changing the position of the rod 37 with respect to the stay 38, the biasing force of the spring 35 can be adjusted.

The operation lever 36 is supported by the stay 39 so as to be able to swing around the swing axis Z2. The stay 39 is fixed to the raising drive shaft case 31 with bolts 40 .

With such a configuration, as shown in FIG. 4, when the operation lever 36 is swung about the swing axis Z2 in the direction of the arrow, the tension arm 34 is tensioned by the spring 35 about the swing axis Z1. It is biased to swing in the direction. As a result, the tension roller 33 comes into contact with the left stock base chain 22A, and tension is applied to the left stock base chain 22A. That is, the tension mechanism 32 is in a tension applying state.

Here, in the tension applied state, the operating lever 36 is in contact with the corner of the stay 39 beyond the dead point DP1. As a result, the operating lever 36 does not swing further in the direction of the arrow around the swing axis Z2.

Then, as shown in FIG. 5, when the operation lever 36 is operated to swing about the swing axis Z2 in the direction of the arrow, the biasing force of the spring 35 stops acting on the tension arm 34. As shown in FIG. As a result, the tension roller 33 is separated from the left stock base chain 22A, and the application of tension to the left stock base chain 22A is released. That is, the tension mechanism 32 is in the tension released state.

[tip guide]
As shown in FIGS. 6 and 7, the right tip guide 27D is provided with an upper tip guide 27Da and a lower tip guide 27Db. The upper ear tip guide 27Da is provided facing the portion of the right ear tip chain 27A on the transport route R1 side for transporting the harvested grain culm, and is configured to guide the upper portion of the tip of the harvested grain culm. The lower tip guide 27Db is provided facing the portion of the right tip chain 27A on the transport route R1 side that does not transport the harvested culms, and is configured to guide the lower portion of the tip of the harvested culms. As described later in detail, the upper tip guide 27Da and the lower tip guide 27Db are in a use state (see FIG. 6) approaching the right tip chain 27A and a separated state (see FIGS. 9 and 10) away from the right tip chain 27A. is configured to be switchable to

[Supply Guide]
As shown in FIG. 6, the supply guide 21B is provided facing the portion of the supply chain 21A on the transport route R1 side for transporting the harvested grain culms, and is configured to guide the base of the harvested grain culms. there is The supply guide 21B is supported by a pressing device 41 that urges the supply guide 21B toward the supply chain 21A. As will be described later in detail, the supply guide 21B is configured to be switchable between a use state (see FIG. 6) approaching the supply chain 21A and a separated state (see FIGS. 9 and 10) away from the supply chain 21A. .

[Left stock original frame]
As shown in FIGS. 6 and 7, a left stock base frame 42 (corresponding to a "conveyance frame" and a "support section" according to the present invention) is provided to support the left stock chain 22A. The left stock base frame 42 is supported by the drive shaft case 31 so as to swing left and right around the swing axis Z3.

A left tip frame 43 and a supply frame 44 are supported by the left stock base frame 42 . That is, the left stock base frame 42 is connected to the left tip frame 43 and the supply frame 44 so as to be able to swing integrally. The left tip frame 43 supports the left tip conveying device 23 (the left tip chain 23A, etc.). The supply frame 44 supports the supply guide 21B, the upper tip guide 27Da and the lower tip guide 27Db.

[Supply frame]
As shown in FIGS. 6 and 7, the supply frame 44 is provided extending along the longitudinal direction of the fuselage in plan view. A front end portion of the supply frame 44 is supported by the left stock base frame 42 . That is, the supply frame 44 is positioned inside the machine body (on the right side of the machine body) where the supply guide 21B, the upper tip guide 27Da, and the lower tip guide 27Db are in use with the left stock base frame 42 supporting the front end of the supply frame 44 as a fulcrum. position (see FIG. 6) and a position outside the body where the supply guide 21B, the upper tip guide 27Da and the lower tip guide 27Db are separated (position on the left side of the body, see FIGS. 9 and 10). It is configured so that it can swing left and right around the center Z3. The supply frame 44 includes a front frame portion 45 forming a front portion of the supply frame 44 and a rear frame portion 46 forming a rear portion of the supply frame 44 .

The front frame portion 45 is supported by the left stock base frame 42 . A front attachment portion 47 attached to the left stock base frame 42 is provided at the front end portion of the front frame portion 45 . The left stock base frame 42 is provided with an attachment portion 48 to which the front attachment portion 47 is attached. The front mounting portion 47 is bolted to the mounting portion 48 .

The rear frame portion 46 is supported by the front frame portion 45 so as to be able to swing left and right about the swing axis Y1. That is, the supply frame 44 is configured to be bendable at the front and rear intermediate portions. The rear frame portion 46 is fixed to the front frame portion 45 with bolts 49 .

The rear frame portion 46 supports the supply guide 21B, the upper tip guide 27Da, and the lower tip guide 27Db. The supply guide 21B is supported by the rear frame portion 46 via the pressing device 41. As shown in FIG. The upper tip guide 27Da and the lower tip guide 27Db are supported by the rear frame portion 46 via stays 50 . The upper tip guide 27Da and the lower tip guide 27Db are supported only by the supply frame 44 .

The rear frame portion 46 is provided with a first rear attachment portion 51 to which the stay 50 is attached. The stay 50 is bolted to the first rear attachment portion 51 .

A raising frame 52 that supports the upper portion of the raising device 11 extends forward from the base end of the reaping shaft case 29 . A horizontal frame 53 that supports the rear frame portion 46 extends leftward from the raising frame 52 . The rear frame portion 46 is supported by the raising frame 52 via the horizontal frame 53 .

[First locking mechanism]
As shown in FIGS. 6 to 8 , a first lock that can be switched between a locked state in which the position of the rear frame portion 46 is fixed with respect to the front frame portion 45 and an unlocked state in which the fixed position of the rear frame portion 46 is released. A mechanism 54 (corresponding to the "locking mechanism" according to the present invention) is provided. That is, the first locking mechanism 54 has a locked state in which the supply frame 44 is fixed in a state in which the supply guide 21B, the upper tip guide 27Da, and the lower tip guide 27Db are used, and a lock in which the position of the rear frame portion 46 is released. It is configured to be switchable between the released state and the released state. The first lock mechanism 54 is configured across the front frame portion 45 and the rear frame portion 46 . The first locking mechanism 54 is provided with a pin 55 and front and rear hooks 56 that can be hooked on the pin 55 .

The pin 55 is provided on the rear frame portion 46 so as to protrude forward from the rear frame portion 46 and protrude rearward from the rear frame portion 46 . The front frame portion 45 is formed with an engagement groove 45a opening toward the left side so that the pin 55 can be engaged therewith.

The front and rear hooks 56 are supported by stays 57 so as to be vertically swingable integrally about the swing axis Y2. The stay 57 is provided on the front frame portion 45 . A handle 58 is provided for swinging the front and rear hooks 56 . A spring 59 is provided across the stay 57 and the handle 58 to oscillate the front and rear hooks 56 to the side where they are caught by the pin 55 about the oscillation axis Y2.

According to such a configuration, as shown in FIG. 7, with the pin 55 engaged with the engaging groove 45a, the front and rear hooks 56 are pivoted by the handle 58, so that the front hook 56 is engaged with the pin. 55 and the rear hook 56 is hooked on the rear end of the pin 55 (see the hook 56 drawn in solid lines in FIG. 7), the first locking mechanism 54 is locked. . Thus, the rear frame portion 46 is positionally fixed with respect to the front frame portion 45 by the first locking mechanism 54 .

When the front and rear hooks 56 are oscillated by the handle 58 to release the front and rear hooks 56 from the pin 55 (see the hooks 56 drawn by two-dot chain lines in FIG. 7), the first locking mechanism 54 is unlocked. Thus, the positional fixation of the rear frame portion 46 by the first locking mechanism 54 is released.

[Second lock mechanism]
As shown in FIGS. 6 to 8, a second locking mechanism 60 is switchable between a locked state in which the supply frame 44 is positionally fixed with respect to the lateral frame 53 and an unlocked state in which the positional fixation of the rear frame portion 46 is released. (corresponding to the "locking mechanism" according to the present invention) is provided. That is, the second locking mechanism 60 has a locked state in which the supply frame 44 is fixed in a state in which the supply guide 21B, the upper tip guide 27Da, and the lower tip guide 27Db are used, and an unlocked state in which the position of the supply frame 44 is released. It is configured to be switchable between states. The second lock mechanism 60 is configured across the supply frame 44 and the horizontal frame 53 . Specifically, the second lock mechanism 60 is configured across the first stay 61 and the second stay 62 . The first stay 61 is provided on the left end of the horizontal frame 53 . The second stay 62 is provided on the upper surface of the stay 50 . The first stay 61 and the second stay 62 are fixed by bolts 63 . The second lock mechanism 60 has a pin 64 and a hook 65 that can be hooked on the pin 64 .

The pin 64 is provided on the first stay 61 so as to protrude rearward from the rear surface of the first stay 61 . The pin 64 is configured by a pin with a head.

The hook 65 is positioned on the rear side of the second stay 62 and is supported by the second stay 62 so as to be vertically swingable about the swing axis Y3. The hook 65 is provided with a handle 66 for swinging the hook 65 . A torsion spring 67 is provided to oscillate the hook 65 toward the side where the hook 65 is caught by the pin 64 around the oscillation axis Y3.

According to such a configuration, as shown in FIG. 7, when the hook 65 is swung by the handle 66 and hooked on the pin 64 (see the hook 65 drawn in solid lines in FIG. 7), , the second locking mechanism 60 is locked. Thus, the supply frame 44 is positionally fixed by the second lock mechanism 60 so that the supply guide 21B, the upper tip guide 27Da, and the lower tip guide 27Db are in use.

When the handle 66 is operated to swing the hook 65 to release the hook 65 from the pin 64 (see the hook 65 drawn by the two-dot chain line in FIG. 7), the second lock mechanism 60 is unlocked. state. Thus, the positional fixation of the supply frame 44 by the second lock mechanism 60 is released.

[Switching the supply guide and the tip guide to the separated state]
As shown in FIG. 9, the positional fixation of the supply frame 44 by the second lock mechanism 60 is released, the fixation of the second stay 62 by the bolt 63 is released, and the tension mechanism 32 is switched to the tension released state.

When the supply frame 44 is pivoted laterally outward (left side) of the machine body about the pivot axis Z3, the supply guide 21B is separated from the supply chain 21A and moved upward along with the pivoting of the supply frame 44. The tip guide 27Da and the lower tip guide 27Db are separated from the right tip chain 27A. At that time, the left stock base frame 42 and the left tip frame 43 swing together with the supply frame 44 .

Then, as shown in FIG. 10, the positional fixation of the rear frame portion 46 by the first locking mechanism 54 is released, and the fixation of the rear frame portion 46 by the bolts 49 is released.

When the rear frame portion 46 is pivoted laterally outward (to the left) of the machine body about the pivot axis Y1, the supply guide 21B is further separated from the supply chain 21A as the rear frame portion 46 pivots. In addition, the upper tip guide 27Da and the lower tip guide 27Db are further separated from the right tip chain 27A.

Thus, the supply guide 21B is configured to be switchable between a use state (see FIG. 6) approaching the supply chain 21A and a separated state (see FIGS. 9 and 10) away from the supply chain 21A. The guide 27Da and the lower tip guide 27Db are configured to be switchable between a use state (see FIG. 6) approaching the right tip chain 27A and a separated state (see FIGS. 9 and 10) away from the right tip chain 27A.

As shown in FIGS. 11 and 12, the pressing device 41 is configured to move and urge the supply guide 21B toward the supply chain 21A. The pressing device 41 includes a main body 68 , a pair of rods 69 , a pair of springs 70 , an attachment/detachment lever 71 and a spring holding mechanism 72 .

The main body 68 includes a top plate portion 68A, a left side wall portion 68B depending from the left edge of the top plate portion 68A, and a right side wall portion 68B depending from the right edge of the top plate portion 68A. ing. A pin 73 is erected on the right side of the main body 68 .

The main body 68 is supported by the supply frame 44 via stays 74 . A rear end portion of the rear frame portion 46 is provided with a second rear attachment portion 75 to which a stay 74 is attached. The stay 74 is bolted to the second rear attachment portion 75 . The stay 74 is provided with two pins 76 for attaching the main body 68 . Two through holes 68Ba through which the pins 76 pass are formed in the left side wall portion 68B.

The rod 69 is slidably supported by the left and right side wall portions 68B while passing through the left and right side wall portions 68B. The end of the rod 69 on the supply guide 21B side is connected to the supply guide 21B.

The spring 70 is provided on the outer circumference of the rod 69 inside the main body 68 . The spring 70 is configured to bias the rod 69 toward the supply chain 21A.

The attachment/detachment lever 71 is supported by the left side wall portion 68B so as to be able to swing about the swing axis X2. Two engagement grooves 71 a that engage with the pin 76 are formed in the attachment/detachment lever 71 . By engaging the engagement groove 71a with the pin 76 from above, the main body 68 is attached to the stay 74 in a state in which the pin 76 does not come off the through hole 68Ba.

The spring holding mechanism 72 is configured to hold the spring 70 in a predetermined contracted state (see FIG. 13). The spring holding mechanism 72 has a wire 77 and a release lever 78 .

A wire 77 is provided across the supply guide 21B and the release lever 78 . The release lever 78 is supported by the top plate portion 68A so as to be able to swing about the swing axis Z4. The release lever 78 has an arm 79 and a handle 80 . The arm 79 includes a first arm portion 79A to which the wire 77 is attached and a second arm portion 79B to which the handle 80 is attached. The handle 80 is configured to be switchable between a use state and a storage state.

With such a configuration, as shown in FIG. 13, the supply guide 21B is pulled through the wire 77 when the release lever 78 is swung around the swing axis Z4 in the direction of the arrow. When the tip of the first arm portion 79A passes the dead point DP2 and the second arm portion 79B comes into contact with the pin 73, the release lever 78 swings further in the direction of the arrow around the swing axis Z4. will disappear. Thus, the spring 70 is held in a predetermined contracted state by the spring holding mechanism 72 .

As a result, when harvested grain culms are jammed between the supply chain 21A and the supply guide 21B, when the pressing device 41 is removed from the stay 74, the biasing force of the spring 70 acts on the detachable lever 71, thereby 71 is not strongly pinched between the left side wall portion 68B and the head of the pin 76.例文帳に追加Therefore, in order to release the engagement of the engagement groove 71a with the pin 76, the attachment/detachment lever 71 can be easily swung around the pivot axis X2 (see the attachment/detachment lever 71 drawn by the two-dot chain line in FIG. 13). )can do. Then, the attachment/detachment lever 71 is pivoted around the pivot axis X2 to release the engagement of the engagement groove 71a with the pin 76, thereby pulling out the main body 68 from the pin 76 and moving the pressing device 41 to the stay 74. can be removed from

[Another embodiment]
(1) In the above embodiment, the supply frame 44 is configured to be bendable at the front and rear intermediate portions. However, the supply frame 44 may be configured so that it cannot be bent at the front-rear middle portion.

(2) In the above embodiment, the supply frame 44 is configured to be swingable with the left stock base frame 42 as a fulcrum. However, the supply frame 44 may be configured to be swingable with a member different from the left stock base frame 42 as a fulcrum.

(3) In the above embodiment, the first locking mechanism 54 and the second locking mechanism 60 are provided as the "locking mechanism" according to the present invention. That is, two "locking mechanisms" according to the present invention are provided. However, the number of "locking mechanisms" according to the present invention may be one. Also, the number of "lock mechanisms" according to the present invention may be three or more.

(4) In the above embodiment, the upper tip guide 27Da and the lower tip guide 27Db are supported only by the supply frame 44 . However, the upper tip guide 27Da and the lower tip guide 27Db may be supported by a member separate from the supply frame 44 in addition to the supply frame 44 as long as they can swing integrally with the supply frame 44. .

(5) In the above embodiment, the reaping unit 4 is configured for six-row reaping. However, the reaping unit 4 is not limited to six-row reaping.

INDUSTRIAL APPLICABILITY The present invention can be used for self-threshing combine harvesters.

4 reaping unit 6 threshing device 7 feed chain 21 supply transport device (downstream transport device, supply transport device)
21A supply chain (endless rotating body)
21B supply guide (guide member, supply guide)
22 Left stock base conveying device (endless rotary conveying device)
22A left stock chain (endless rotating body)
27 right tip conveying device (downstream conveying device, tip conveying device)
27A right tip chain (endless rotating body)
27D right tip guide (guide member, tip guide)
32 tension mechanism 42 left stock base frame (conveyance frame, support section)
44 supply frame 54 first lock mechanism (lock mechanism)
60 second lock mechanism (lock mechanism)
J Junction R1 Conveyance route R2 Return route

Claims (7)

a threshing device for threshing harvested grain culms;
a reaping unit provided in front of the threshing device for reaping a plurality of planted grain culms, joining the harvested grain culms and conveying them toward the threshing device;
The harvesting unit has a downstream conveying device that conveys the plurality of joined grain harvested culms on the downstream side in the conveying direction of the junction where the plurality of grain harvested culms join,
The downstream-side conveying device is endless so that the part on the conveying path side that conveys the harvested culms is positioned outside the machine body and the part on the return path side that does not convey the harvested culms is positioned inside the machine body. a rotating body; and a guide member provided opposite to a portion of the endless rotating body on the conveying path side for guiding harvested grain culms,
The guide member is configured to be switchable between a use state in which it approaches the endless rotating body and a separated state in which it moves away from the endless rotating body ,
The reaping unit has a supply frame that extends along the front-rear direction of the fuselage in a plan view and supports the guide member,
The supply frame extends from a position inside the machine body where the guide member is in the used state and a position outside the machine body where the guide member is in the separated state with a support portion that supports the front end portion of the supply frame as a fulcrum. A self-throwing combine harvester configured to be swingable at the front and rear intermediate portions thereof . a threshing device for threshing harvested grain culms;
a reaping unit provided in front of the threshing device for reaping a plurality of planted grain culms, joining the harvested grain culms and conveying them toward the threshing device;
The harvesting unit has a downstream conveying device that conveys the plurality of joined grain harvested culms on the downstream side in the conveying direction of the junction where the plurality of grain harvested culms join,
The downstream-side conveying device is endless so that the part on the conveying path side that conveys the harvested culms is positioned outside the machine body and the part on the return path side that does not convey the harvested culms is positioned inside the machine body. a rotating body; and a guide member provided opposite to a portion of the endless rotating body on the conveying path side for guiding harvested grain culms,
The guide member is configured to be switchable between a use state in which it approaches the endless rotating body and a separated state in which it moves away from the endless rotating body,
The threshing device has a feed chain that is provided on the lateral side of the threshing device and that pinches and conveys the base of the harvested grain culm,
The reaping unit, as the downstream conveying device, is arranged on the upstream side in the conveying direction with respect to the feed chain, and feeds and conveys by pinching and conveying the stems of a plurality of joined harvested grain culms and supplying them to the feed chain. having a device
The supply and transport device has, as the guide member, a supply guide that guides the base of the harvested grain culms,
The reaping unit has a supply frame that extends along the longitudinal direction of the fuselage in plan view and supports the supply guide,
The supply frame extends from a position inside the machine body where the supply guide is in the used state and a position outside the machine body where the supply guide is in the separated state with a support portion that supports the front end portion of the supply frame as a fulcrum. A self -throwing combine harvester configured to be swingable at the front and rear intermediate portions thereof . The reaper is configured separately from the downstream side conveying device, and includes an endless rotating conveying device for conveying harvested grain culms, and an endless rotary conveying device connected to the supply frame so as to be able to swing integrally with the endless rotating conveying device. a transport frame that supports the moving body;
A tension mechanism for applying tension to the endless rotating body of the endless rotating conveying device,
The tension mechanism is configured to be switchable between a tension applying state in which tension is applied to the endless rotating body of the endless rotating conveying device and a tension release state in which tension is released from being applied to the endless rotating body of the endless rotating conveying device. The self-threshing combine according to claim 1 or 2 . 3. The lock mechanism according to claim 2 , further comprising a lock mechanism capable of switching between a locked state in which the supply frame is fixed in a state in which the supply guide is used and an unlocked state in which the fixed position of the supply frame is released. Self-throwing combine harvester. The harvesting unit has, as the downstream conveying device, a tip conveying device that holds and conveys the tips of a plurality of joined harvested grain culms,
The self-throwing combine according to any one of claims 1 to 4, wherein the tip conveying device has, as the guide member, a tip guide for guiding the tip of harvested grain culms. The self-throwing combine according to claim 5 , wherein the tip guide is supported by the supply frame. 7. The self-throwing combine harvester according to claim 6 , wherein said tip guide is supported only by said supply frame.

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