JP2016202006A - Reaping part of combine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reaping part of a combine which prevents a chain from being detached in a culm foot conveyance chain device with a simple constitution and enhances transfer horizontal conveyance performance of a grain culm from a culm raking device.SOLUTION: A reaping part 3 of a combine includes a culm foot conveyance chain device 23R transferring a reaped grain culm from a raking passage A by right/left star wheels 20 via a bend conveyance passage A1 and holding and horizontally conveying the grain culm toward a threshing feed chain 4a side. A movable chain guide 76 is arranged in the bend conveyance passage A1 formed between a chain sprocket 72 and a chain frame 71, the movable chain guide formed of a belt plate spring member entering into an interval between upper/lower plates of a chain 70 and pressing and contacting a chain pin 70b in a planar manner, thereby transfer conveyance of the grain culm is carried out by preventing chain detachment.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a combine harvester.

Conventionally, the harvesting part of the combiner is configured such that the right star wheel is moved from the end of the vertical scavenging passage formed by the left and right star wheels that are driven by the pulling device and cut by the cutting blade. The chain sprocket provided to rotate coaxially with the stock source chain and the stock source chain frame provided in a laterally inclined manner toward the left side are handed over to the transport start end portion of the stock source transport chain device configured by winding the chain, and the left side It is comprised so that clamping conveyance may be carried out toward the feed chain side of the threshing part arrange | positioned back. (For example, refer to Patent Document 1.)
In the stock transport chain device of the cutting part, the chain wound around the chain sprocket and the stock chain chain is formed in a concave shape on the transport start end side in the initial stage of handing over the cereal rice cake taken over from the end of the scraping passage The bent conveying path is configured to bend and convey laterally while being vertically conveyed shortly rearward, and then horizontally nipped and conveyed by a round bar-shaped grain guide guide (clamping rail). As a result, the stock transport chain device takes over the cereals fed from the right-hand scraping passage and forms a longitudinal transport path that is long in the front-rear direction, and takes over the short transport path from the scraping path to the bending transport path. Therefore, it is possible to reduce the size by shortening the longitudinal length of the cutting part and to improve the weight balance in the longitudinal direction of the machine body.

JP 2012-139115 A

Since the cutting part described in the above-mentioned patent document 1 carries out nipping and feeding laterally through the bending conveyance path while taking over the culm from the scraping path by a short vertical conveyance path, the cutting part has a short front and rear length. There is an advantage that the weight balance in the longitudinal direction of the machine body can be made suitable.
However, the stock transport chain device installed in a forward tilting posture with a bent transport path is used when traveling on the road or turning or moving on the field, or when the combine operation is stopped when the cutting unit and travel are stopped. During non-chestnut conveyance such as when the conveyance operation is suspended so that no conveyance kernel is present in the conveyance path, the bent conveyance path is between the chain sprocket and the chain frame start end where the grain guidance guide does not work. The chain part located in the position is not subjected to the pressing force caused by the picking-up and carrying cereal, so it moves toward the front side as shown by the solid line in FIG. Occasionally, as shown by a two-dot chain line in FIG. 10A, the chain portion may be bent and stretched due to its own weight slack.
Then, at the start of conveying the harvested cereal rice cake that rotates the chain as the combine operation resumes, the chain part of the bending conveyance path becomes tensioned while moving backward from the bent tension state, and the left and right star wheels are scraped together. While being pushed and pressed by the culm and having the curvature of the bending conveyance path, the transverse transversal feed by the chain and the culm guide is started.
For this reason, the combine equipped with the stock transport chain device as described above is configured so that the chain plate of the chain portion positioned in a bent state on the bending transport path of the stock transport chain device at the start of transporting the cereal is downward from the chain frame. When the transfer is started with a large misalignment toward the end, the chain plate is brought into contact with the end of the chain frame to cause damage to each other and to make it difficult to remove the chain. It was.

The present invention that solves the above-mentioned problems is as follows. First, the right star wheel 20 is moved from the terminal end of the scraping passage A formed by the left and right star wheels 20 that scrape and rotate the rice cake cut by the cutting blade 13. The threshing feed of the threshing part 4 on the left rear side is taken over via a bent conveying path A1 formed in a concave shape on the conveying start end side of the chain 70 wrapped around the chain sprocket 72 and the stock chain frame 71 facing sideways. In the harvesting unit 3 of the combine provided with the stock transport chain device 23R for nipping and transporting toward the chain 4a side,
The upper and lower formed between the chain sprocket 72 forming the bending conveying path A1 of the stock conveying chain device 23R and the start end of the chain frame 71 from the inner peripheral side of the chain 70 to be wound between the upper and lower chain plates 70a. A movable chain guide 76 composed of a strip plate spring member is provided that presses the chain pin 70b flatly toward the front side by a strip-shaped plate surface along the conveying direction while entering the plate interval. The chain 70 part positioned in the bending conveyance path A1 at the time of cocoon conveyance is elastically pressed and biased forward from the inner peripheral side while restricting the movement in the vertical direction, and the grain at the time of cereal conveyance It is characterized in that the takeover transfer of the bag is performed while preventing the chain from coming off.
Secondly, the movable chain guide 76 is attached to a support member 77 provided on the chain frame 71 side, the front end side is brought close to the chain sprocket 72, and the end side is slid along the front end side of the chain frame 71. It is characterized by free contact support.

According to the invention which concerns on Claim 1, it takes over from the termination | terminus of the scraping channel | path formed by the left and right starwheels via the bending conveyance path formed in the conveyance start end side of a chain, and it is on the threshing feed chain side of the threshing part. In a harvesting part of a combine equipped with a stock transport chain device for holding and transporting toward the inside of a chain wound between a chain sprocket that forms a bending transport path of the stock transport chain device and a start end of a chain frame Provided is a movable chain guide composed of a strip spring member that presses the chain pin in a plane toward the front side by a strip-shaped plate surface along the transport direction while entering the space between the top and bottom plates formed between the top and bottom chain plates from the circumferential side. Therefore, the chain that moves forward on the bending conveyance path during non-grain haul conveyance and hangs down is moved to the inner circumference side by the movable chain guide. While resiliently pressing biased toward the front side, it is possible to perform the chain tension support which restricts the movement in the vertical direction in a stable manner.
In addition, the chain that moves backward on the bending conveyance path at the start of cereal conveyance is elastically supported by the movable chain guide while restricting movement in the vertical direction and guided to the chain frame. The conveyance can be started smoothly.
According to the invention of claim 2, the movable chain guide is attached to the support member provided on the chain frame side, the front end side is brought close to the chain sprocket, and the end side is slid along the front end side of the chain frame. By freely contacting and supporting the movable chain guide, it smoothly enters the space between the upper and lower chain plates and pushes and urges the chain pin, and the end side is slidable along the tip side of the chain frame. Since it is supported by contact, the upper and lower end surfaces of the strip plate restrict the large vertical amplitude movement caused by the hanging of the chain portion located in the bending conveyance path and the body vibration. Also, the movable chain guide slides in a plane with its end side supported in a sandwiched manner on the chain frame side via upper and lower chain plates, so that the chain can be moved back and forth freely. It is possible to perform elastic takeover conveyance according to the amount of cereal while preventing clogging and spillage.

It is a left front perspective view of a combine. It is a left view of the reaping part showing the periphery of the culm scraping device and the culm conveying device. It is a front view which shows the corn straw scraping apparatus and corn straw conveying apparatus of a cutting part. It is a top view which shows the structure of a cereal rake device and a stock former conveyance chain apparatus. It is a top view which shows the effect | action of the structure of a stock former conveyance chain apparatus, and the chain detachment | blocking prevention mechanism at the time of grain straw conveyance. It is a right back perspective view of a corn grain scraping device. It is a left view which fractures | ruptures and shows a part of middle left cereal scraping device. It is an enlarged plan view of the principal part which shows the structure effect | action of the stock former conveyance chain apparatus and chain detachment prevention mechanism at the time of non-cereal haul conveyance. It is a left view which shows the structure of the principal part of a right grain mashing apparatus and a stock former conveyance chain apparatus. It is sectional drawing which shows the effect | action of the bending conveyance path of a stock former conveyance chain apparatus, and a chain detachment | blocking prevention mechanism, (a) is sectional drawing of a non-wheat grain conveyance state, (b) is sectional drawing of a wheat straw conveyance state. It is a structure figure of the transmission system of a cutting part. It is an enlarged plan view of the principal part which shows the structure effect | action of the chain dislocation prevention mechanism concerning another embodiment.

An embodiment of the present invention will be described with reference to the drawings. First, the basic structure of the combine 1 employing the present invention will be described with reference to FIG. This combine 1 is mounted on a machine body 1 a equipped with a crawler type traveling device 2, and a harvesting part 3 for four-row cutting is mounted on the left front side so as to be able to be turned up and down and moved up and down. The threshing unit 4 that inherits and performs the threshing selection process is mounted, and a cocoon processing unit 5 that cuts the shed sorghum after the threshing unit 4 is provided.
And the operation operation part 6 is arrange | positioned in the right front part of the body 1a, and the grain discharge auger 7 which stores the grain threshed and sorted by the threshing part 4 behind it and discharges the stored grain outside the machine. The grain tank 8 equipped with is attached.

  First, the basic structure of the cutting unit 3 will be described with reference to FIGS. The cutting unit 3 is a weed body 10 for weeding cereals (planted cereals) planted in a field, a pulling device 11 for causing the weeded cereals, and a culm squeezing for causing the induced cereals. The device 12, the cutting blade 13 laid horizontally below the culm scoring device 12, and the threshing part 4, which is inherited from the culm scoring device 12, and is chopped by the rear threshing unit 4. It consists of the cereal conveyance device 14 etc. which conveys to. Then, the transmission and reaping portion frame structure to each device is fixed to the lower end of the vertical transmission cylinder 15 and the vertical transmission cylinder 15 which are provided with a vertical transmission shaft 15a input from the engine side mounted on the airframe 1a. A base part is fixed to the left and right ends of the horizontal transmission cylinder 16, which is provided with a shaft 16 a, and a vertical transmission cylinder 17, which is erected from the horizontal transmission cylinder 16 and has a transmission shaft 17 a to the pulling device 11. The left and right weeding frames 18L and 18R to which the weeding body 10 is attached, the left and right weeding frames 18L and 18R are connected to each other, the horizontal frame 19 that supports the cutting blade 13 and the base are fixed to the horizontal frame 19, and the weeding body 10 is attached to the tip. It is comprised from the weeding frame 18a etc. to attach.

The cutting part frame of the cutting part 3 has a frame structure composed of the vertical transmission cylinder 15, the horizontal transmission cylinder 16, the pulling vertical transmission cylinder 17, the left and right weed frames 18L and 18R, the horizontal frame 19, and the central weed frame 18a. Has been. The vertical transmission cylinder 15 is mounted on the machine body 1a so as to be rotatable up and down around the horizontal axis Y, and the vertical transmission cylinder 15 is expanded and contracted by a hydraulic cylinder (not shown) provided between the vertical transmission cylinder 15 and the machine body 1a. 15 is configured to rotate up and down about the horizontal axis Y so that the entire cutting unit 3 moves up and down.
In addition, the pulling vertical transmission cylinder 17 includes a left pulling vertical transmission cylinder (not shown) that houses a transmission shaft 17 a that is transmitted to the left one row of the pulling devices 11, and a transmission shaft 17 a that is transmitted to the central two rows of the pulling devices 11. And a right pulling vertical transmission cylinder (not shown) having a transmission shaft 17a that transmits power to the first row of pulling devices 11. The upper part of the pulling device 11 is supported.

  The cereal scraping device 12 has a left cereal scraping device 12L located on the left side, a middle left cereal scraping device 12CL and a middle right pestle scraping device 12CR located on the left and right of the center, and a right side The right cereal scraping device 12R, and each of the cereal scraping devices 12L, 12CL, 12CR, and 12R, respectively, includes a star wheel 20 that rakes the stock portion of the lower culm and an upper culm It is comprised with the latching scraper 21 which scrapes the stalk part of. Further, the locking scraper 21 is constituted by a protruding scraping belt. In addition, the rotation direction of each star wheel 20 is shown by the arrow a attached | subjected in a figure.

The grain straw transporting device 14 includes a left transporting body 14L positioned on the front left side, a right transporting body 14R positioned on the front right side, and a handling depth transporting body 22 positioned behind the left transporting body 14L. Each of 14R is composed of a lower stock transporting device 23L, 23R, a middle middle tip transporting body 24L, 24R, and an upper top tip transporting body 25L, 25R. It consists of a chain 22a and an upper handling tip end carrier 22b. (Figure 3)
As a result, the cereals scraped by the left cereal scraping device 12L and the middle left pestle scraping device 12CL of the cereal scraping device 12 are inherited by the left transport body 14L of the cereal transporting device 14, and The cereals scraped by the middle right cereal scraping device 12CR and the right pestle scraping device 12R are inherited by the right transporter 14R and merged with the cereals transported by the left transporter 14L at the end side. , It is inherited by the handling depth conveyance body 22. Then, the combined cereal meal is transferred to the threshing feed chain 4a and supplied to the threshing unit 4 and subjected to threshing processing while the handling depth is adjusted by the handling depth carrier 22.

  Next, the structure of the transmission system of the cutting unit 3 will be described with reference to FIG. The power from the engine 26 mounted on the machine body 1a is input to the transport HST 27, and the power shifted by the transport HST 27 is transmitted to the input pulley 30 of the cutting unit 3 through the gear case 28 and the output pulley 29, and from the horizontal axis Y. It is transmitted to the handling depth carrier 22. On the other hand, it is transmitted from the horizontal axis Y to the left and right transport bodies 14L, 14R, the grain scraping device 12, the cutting blade 13, and the pulling device 11 through the vertical transmission shaft 15a and the horizontal transmission shaft 16a. Next, the detailed transmission structure to the cereal scraping device 12 will be described by taking the transmission to the left cereal scraping device 12L and the middle left culm scraping device 12CL as an example, and the transmission shaft 14La of the left carrier 14L. It is transmitted to the star wheel 20 and the locking scraper 21 of the left cereal scraping device 12L via the stock transport chain device 23L transmitted from the middle, and this star wheel 20 and the middle left cereal scraping device 12CL are transmitted. The star wheel 20 of the middle left grain mashing device 12CL is driven by the engagement of the star wheel 20 of the left and right.

  In addition, the latching scraper 21 of the middle left cereal scraping device 12CL is driven by a drive shaft 31 (driving shaft of the cereal scraping device) fixed to the star wheel 20 of the middle left cereal scraping device 12CL. In the transmission structure, the cereal scraping device 12 is provided with an anti-winding mechanism 33 that prevents the chopping cereal and sawdust and weed from being wound around the drive shaft 31 and the star wheel 20 and the mud soil. ing. The winding prevention mechanism 33 includes a winding prevention cylinder 35 that covers the drive shaft 31 between the star wheel 20 and the locking scraper 21, and winding of the cereals around the winding prevention cylinder 35. The anti-winding guide 36 to be prevented, and the scraper 37 attached to the anti-winding guide 36 as necessary are included. In addition, the transmission to the right cereal scraping device 12R is also substantially the same as described later, and the right culm scraping device via a stock transport chain device 23R transmitted from the middle of the transmission shaft 14Ra of the right transport body 14R. It is transmitted to 12R.

  Next, the middle left cereal rake device 12CL, the middle right cereal rake device 12CR, its support structure, the winding prevention mechanism 33, and the like will be described with reference to FIGS. First, the support structure will be described. The support frame 51 is fastened and fixed to the bracket 50 welded and fixed to the middle portion of the middle pulling longitudinal transmission cylinder 17C, and the left and right grains are fixed to the plate 52 welded and fixed to the tip of the support frame 51. The front side portions of the locking scrapers 21 and 21 of the koji scraping device 12CL and the middle right grain koji scraping device 12CR are fastened and fixed. The front end of the plate 52 is connected and fixed to the central weeding frame 18a. Support members 53 that are orthogonal to each other are fixed by welding in the middle of the support frame 51, and support shafts 54 and 54 that support the star wheels 20, 20, etc., and the drive shaft 31 are welded and fixed in a suspended position at both ends of the support member 53. The rear side portions of the locking scrapers 21 and 21 are fastened and fixed via brackets 55 fixed by welding in the middle of the support shafts 54 and 54. That is, the middle left grain culm scraping device 12CL and the middle right grain culm scraping device 12CR are supported by the middle pulling vertical transmission cylinder 17C constituting the frame of the cutting unit 3.

  Next, the middle-left cereal scraping device 12CL will be described with reference to FIGS. The support shaft 54 is rotatably fitted with a drive shaft 31 of the latching scraper 21, and a drive wheel that hangs a scraping belt K of the latching scraper 21 on the top of the drive shaft 31. A (pulley) 56 is welded and fixed, and an attachment member (disc) 57 of the star wheel 20 is welded and fixed to the lower part. The star wheel 20 is detachably attached to the attachment member 57 from below by a bolt 57a. Further, a washer 58 for preventing the drive shaft 31 from coming off is provided at the lower end of the support shaft 54, and is fixed to the support shaft 54 by a double nut 58a.

  On the other hand, the anti-winding cylinder 35 is provided between the drive wheel 56 and the star wheel 20, and the anti-winding cylinder 35 becomes a cylinder formed of a synthetic resin material and includes the drive shaft 31. Surrounded by the state. The outer periphery of the wrapping preventing cylinder 35 faces the vicinity of the valley portion of the claw tooth projection of the star wheel 20, and the lower end is externally fitted to the mounting member 57, and the upper surface of the star wheel 20 is caused by its own weight. The upper and lower ends of the anti-winding cylinder 35 are regulated in the vertical and front / rear / right / left directions by being placed and supported so as to be freely slidable and inserted in close proximity to the lower surface recess of the drive wheel 56. In other words, the anti-winding cylinder 35 rotates along with the frictional resistance caused by the contact (sliding contact) when the star wheel 20 rotates (sliding). In addition, reliable wrapping prevention and smooth feeding of the harvested cereal meal (rear feeding conveyance) are smoothly performed.

  Next, the winding preventing mechanism 33 will be described with reference to FIGS. The winding prevention mechanism 33 in the illustrated example includes the winding prevention cylinder 35 that is loosely supported so as to cover the drive shaft 31 between the star wheel 20 and the locking scraper 21, and the winding prevention cylinder. It is comprised by the winding prevention guide 36 which prevents the winding of the grain candy with respect to the body 35. FIG. First, the anti-winding cylindrical body 35 has a predetermined horizontal width and high height that can be inserted freely in a loosely fitting manner, with a vertical engagement portion 36a formed at the tip of the anti-winding guide 36 at one side lower part of the cylindrical body. It is formed by a vertically long slit-like insertion part 35a.

  On the other hand, the winding prevention guide 36 is a part of the reaping part frame at the rear side of the winding prevention cylindrical body 35 of the middle left cereal scraping device 12CL. The support bracket 61 provided in the middle portion of the pulling longitudinal transmission cylinder 17C is fastened and fixed by a bolt 62, and the engaging portion 36a at the front end of the plate has a predetermined depth in the insertion portion 35a of the anti-winding cylinder 35. And make it pluggable. The winding prevention guide 36 of the illustrated example has one side outer peripheral surface portion (the rotation axis of the winding prevention cylinder 35 in a plan view) in a state where the engaging portion 36a is inserted into the insertion portion 35a. It extends rearward from the center, that is, rearward from the support shaft 54 and from the support shaft 54 toward the outer peripheral surface of the star wheel 20 near the scraping passage A, and crosses the scratching outer peripheral trajectory of the star wheel 20, and the end portion is scraped outer periphery. It is extended and arranged in the front-rear direction so as to reach the rear of the trajectory.

  In other words, the winding prevention guide 36 is formed at the front end portion, extending from the rear cutting frame of the star wheel 20 toward the upper center position of the star wheel 20 in the tangential direction across the star wheel scraping outer peripheral locus. By inserting the engaging portion 36a into the insertion portion 35a, it is intended to wind around the anti-winding cylinder 35 while restricting the accompanying rotation of the anti-winding cylinder 35 supported in the loosely fitted state. The wrapping adhesion of cereals and the like is prevented, and the stalks are scraped smoothly by the culm scraping device 12.

  In addition, at the upper position of the star wheel 20 of the middle left grain culm scraping device 12CL, there is formed a scraping passage A by a pair of star wheels 20 and extends rearward, and a holding rail of the rear stock transport chain device 23L. A cereal culm guide 64 is provided. An auxiliary guide guide 65 for the culm to the stock transport chain device 23L is provided behind the cereal guide guide 64. The auxiliary guide guide 65 is made of an elastic wire, and a base portion is fixed to the support bracket 61. At the same time, it extends outward and rearward from the hole formed in the winding prevention guide 36 and is opposed to the transport surface of the stock transport chain device 23L.

  Next, the middle right cereal scraping device 12CR will be described. In addition, since support structures, such as the star wheel 20, the latching scratching body 21, and the winding prevention cylinder 35, are the same as that of the middle left grain mashing device 12CL, description is abbreviate | omitted. The middle right pestle scraping device 12CR is provided with a cereal guide guide 66 at an upper position of the star wheel 20, and the cereal guide guide 66 has a curved front side so as to constitute a right side scraping passage A. The lateral clamping conveyance path is configured as a clamping rail of the stock transport chain device 23R by extending in the rear left lateral direction from the bending end. Further, a box-shaped bracket 68 that elastically supports the culm guide guide 66 so as to move back and forth is disposed on the back surface of the winding prevention cylinder 35 of the middle right culm scraping device 12CR. It is fixed to a support member 67 that is fastened and fixed to the bracket 50 that is fixed to the middle pulling vertical transmission cylinder 17C by welding.

  As shown in FIG. 6, a shielding plate 69 is fixed to the box-shaped bracket 68, and the shielding plate 69 is formed between the front side of the bracket 68 and the outer peripheral surface of the anti-winding cylinder 35. By covering the wedge-shaped space K, the dust and the like are prevented from being brought into the space K and accumulated by the rotation of the star wheel 20. For this purpose, the shielding plate 69 has an upper surface 69a that covers the upper portion of the space K and a standing wall surface 69b that covers the front side of the space K (the upper rotation side of the star wheel 20). Close to the outer peripheral surface of the cylindrical body 35, the lower edge of the standing surface 69 b is close to the upper surface of the star wheel 20.

  Further, by utilizing the configuration of the shield plate 69, the front side of the standing wall surface 69b is extended to form a series of vertical winding prevention guides 36, and the tip portion is bent in an inward hook shape. The engaging portion 36a is integrally formed. As a result, the winding preventing guide 36 of the illustrated example is connected to the winding preventing cylindrical body 35 so as to form a series of conveying surfaces by inserting the engaging portion 36a into the insertion portion 35a, and in the loosely fitting supported state. The accompanying rotation of the winding preventing cylinder 35 is restricted. The winding preventing guide 36 tilts the winding preventing cylindrical body 35 by supporting the force in the pushing direction received by the cereal mash to which the winding preventing cylindrical body 35 is conveyed by the vertical engaging portion 36a. In addition to preventing, the wound object to be wound is guided toward the rear in the tangential direction from the winding preventing cylindrical body 35 by the stir feed of the star wheel 20 and dropped and discharged by the guide 36.

  Next, with reference to FIGS. 4 and 5 to 10, the detailed structures of the right cereal scraping device 12 </ b> R, the stock transport chain device 23 </ b> R, and the chain detachment prevention mechanism 75 according to the present invention will be described. First, as shown in FIGS. 4, 5, 8, and 9, the right cereal scraping device 12 </ b> R is formed from the horizontal transmission cylinder 16 or the like at the right end opposite to the threshing feed chain 4 a located on the rear left side of the cutting unit 3. The drive shaft 31 is pivotally supported in a forward inclined posture by a pivot metal 51b provided at the tip of the extended support frame 51a. The drive shaft 31 includes a drive wheel 56 of the locking scraper 21 and a star wheel 20 at upper and lower ends, and a chain sprocket 72 that is a driven side sprocket of the chain 70 is detachably attached thereto. The chain sprocket 72 attaches and supports the star wheel 20 with a chain hooking interval on the lower surface thereof. Note that the shape of the star wheel 20 and the configuration of the locking scraper 21 and the like are the same as those of the middle-left cereal scraping device 12CL and the like, and thus the description thereof is omitted.

  The stock transport chain device 23R includes a chain 70 for transporting and holding the culm of the same type as that of the stock transport chain device 23L, and has a forward tilting posture with the same tilt angle as that of the drive shaft 31. It comprises a chain frame 71 that performs a chain guide along the transport direction. The chain 70 is an endless belt conveyance type in which an upper and lower chain plate 70a having an oval shape with protrusions is connected with a vertical chain pin 70b with an interval between the upper and lower plates. As shown in FIGS. 5, 9, and 10, the chain 70 has an inner periphery of the endless chain, and a chain frame 71, an appropriate number of rollers 71 a that are pivotally supported by the chain frame 71, and the drive shaft from the lateral transmission cylinder 16. 31 is wound around and supported by a drive sprocket 16b provided on a vertical drive shaft that is erected with the same forward tilt angle as 31 and a chain sprocket 72 provided on the drive shaft 31 of the right grain kneading device 12R.

  The chain frame 71 has a leading end (conveyance start end side) facing the extending direction of the side view of the chain sprocket 72 at the end of the take-in passage A, and a trailing end (conveyance end side) of the handling deep stock transport chain 22a. The middle part is attached and supported on the upper side of the horizontal transmission cylinder 16 in a state where it is positioned below the starting end part. The illustrated chain frame 71 is provided with a belt-like frame guide 71c along the conveying surface side of a frame main body 71b made of a pipe material, and the frame guide 71c has a vertical width and a vertical chain plate 70a. The chain pin 70b is slidably guided so as to be slightly smaller than the upper and lower plate intervals.

  In other words, the frame guide 71c is the same as the conventional one, and the start end side in the grain transporting direction is separated from the chain sprocket 72 to the end side of the right side of the scraping passage A (the end position of the feed by the left and right star wheels 20). In addition, the side surface of the chain sprocket 72 is wrapped to the lower side of the conveyance start end portion of the treated deep stock conveyance chain 22a in a state where the chain sprocket 72 faces the midway portion (for example, the drive shaft 31 side). The posture is tilted forward. Further, in the stock transport chain device 23R in which the chain 70 is wound around the chain frame 71 and the chain sprocket 72, a round bar-shaped grain straw guide 66 is inserted between the upper and lower chain plates 70a from the front along the transport direction. , And the chain 70 together with the chain 70 to form a horizontal nipping conveyance path.

  Then, the stock transport chain device 23R configured as described above is configured to feed the cereals to the rear in a short vertical direction at an early stage while the chain 70 to be wound reaches the start end of the chain frame 71 from the chain sprocket 72. A concave bent conveying path A1 is formed between the vertical conveying path and the sandwiched horizontal conveying path in plan view facing the terminal side of the scraping path A. As a result, the bend conveying path is guided while guiding the cereals fed through the vertical scraping path A formed by the left and right star wheels 20 from the vertical conveying path to the bending conveying path A1 in the initial takeover by the chain 70. After reliably taking over and guiding to the holding horizontal conveying path by A1, the horizontal holding and conveying in the left-and-right rear direction by the chain 70 and the culm guide guide 66 is smoothly performed.

  As a result, the stock transport chain device 23R having the vertical transport path, the bending transport path A1, and the horizontal transport path sends the cereals fed from the right side scraping path A to the left transport path via the bending transport path A1. In order to merge with 14L of corn straw, the stock transport chain device 23R is not lengthened in the vertical direction toward the rear, and the corn straw is taken over from the scraping path A by the short vertical conveyance path via the bending conveyance path A1. Perform horizontal feed. Therefore, the cutting part 3 in the illustrated example can make the size balance short in the longitudinal direction and the weight balance in the longitudinal direction of the machine body suitable.

  Further, the stock transport chain device 23R having the bending transport path A1 is provided with a chain detachment prevention mechanism 75 according to the present invention in the space that forms the bending transport path A1, thereby removing the chain on the bending transport path A1 side. Smooth hand-over feeding that does not occur is possible. In addition, if necessary, it is possible to increase the conveyance speed of the chain 70 and to form the bending conveyance path A1 having a large curvature, thereby facilitating the manufacture of the stock transportation chain apparatus 23R that can further shorten the length in the front-rear direction. . That is, the stock transport chain device 23R is provided with a bending transport path A1 in a space (space space) between the chain sprocket 72 and the start end of the frame guide 71c. A chain detachment prevention mechanism 75 that supports the chain tension while allowing the operation elastically is provided.

  4, 5 and 8 to 10, the chain detachment preventing mechanism 75 is a belt-like plate spring member that presses and urges the chain 70 from the inner side (inner peripheral side) to the front side of the bending conveyance path A1. And a support member 77 for mounting and supporting the movable chain guide 76 at a predetermined position close to the chain sprocket 72 from the chain frame 71 side. The support member 77 according to the embodiment is bent in a square shape in a plan view and is provided with a vertical support pin 78 at the front end, and the tip of the movable chain guide 76 is rotatable to the support pin 78 and moved in the pin axis direction. It can be installed freely.

  The movable chain guide 76 is configured to guide the middle part from the front end side attached to the support member 77 so as to protrude toward the front side, and the end side is the frame guide 71c. A predetermined length is brought into contact with the middle portion in the length direction on the tip side so as to be slidable in a plane. In this case, it is desirable that the movable chain guide 76 is gradually made substantially the same as or slightly wider than the height of the frame guide 71c after the middle portion while narrowing the starting end side. Thus, at the initial stage when the movable chain guide 76 comes into contact with the chain pin 70b, the narrow guide portion enters the chain pin 70b with a predetermined elastic force while entering the gap between the upper and lower plate plates 70a and 70b. While pressing with force, the upper and lower end surfaces of the strip can be easily slid while straddling the plurality of chain plates 70a. In addition, the movable chain guide 76 can smoothly guide the rotational movement of the chain 70 while restricting the large vertical swing movement caused by the drooping of the chain 70 facing the bending conveyance path A1 and the body vibration.

  Next, the working mode and characteristics of the cutting unit 3 configured as described above will be described. First, in the combine operation, the cutting unit 3 removes the cereal that has been harvested by the cutting blade 13 as described above from the end of the vertical direction scraping path A formed by the right culm scoring device 12R having the star wheel 20. The stock transfer chain device 23R takes over the vertical conveyance path and the bending conveyance path A1 by the horizontal conveyance path on the left side, transfers to the handling depth conveyance body 22, adjusts the handling depth, and adjusts the threshing feed chain 4a. To the threshing unit 4. During such combine work, when the cutting unit 3 is temporarily suspended and traveled, the stock transport chain device 23R is also stopped by the intermittent operation of the cutting clutch, so the cutting unit 3 is described above. As described above, the non-wheat candy transport state in which the transported candy kernel does not exist in the transport path is repeated.

  In this case, the stock transport chain device 23R is provided on the inner peripheral side of the chain 70 wound between the chain sprocket 72 that forms the bending transport path A1 of the stock transport chain device 23R and the start end of the chain frame 71. A movable chain guide 76 made of a strip plate spring member that presses the chain pin 70b flatly toward the front side by a strip plate surface along the transport direction while entering the space between the top and bottom plate plates formed between the top and bottom chain plates 70a. Since the chain detachment prevention mechanism 75 is installed, the chain 70 moves forward in the bending conveyance path A1 during the non-cereal conveyance and tries to hang down by its own weight. In order to elastically press and urge forward through the chain pin 70b while regulating and supporting movement in the vertical direction via the The chain tension support which restricts the deflection movement of direction with stably performed, it is possible to prevent large positional deviation between the starting end side of the chain frame 71.

  Therefore, the stock transport chain device 23R provided with the chain detachment prevention mechanism 75 in the bending transport path A1 can prevent chain detachment even during traveling on the road during non-grain transportation in which the machine body generates a large vertical vibration. And, when starting grain transportation from the non-grain transportation state, the chain 70 moving through the vertical transportation path and the bending transportation path A1 is elastically moved back and forth while the movable chain guide 76 regulates the vertical movement. Therefore, the chain guide is guided to the chain frame 71 so that the chain guide can be smoothly guided.

  Further, the chain detachment prevention mechanism 75 attaches the movable chain guide 76 to a support member 77 provided on the chain frame 71 side so that the front end side is close to the chain sprocket 72 and the end side is on the front end side of the chain frame 71. It is desirable that the contact is slidable along the contact. In this case, the movable chain guide 76 can be made into a unit structure that allows parts to be assembled to the chain frame 71 in advance, and the movable chain guide 76 is configured in a simple and inexpensive configuration in the space formed behind the bending conveyance path A1. Can be installed easily. In addition, the movable chain guide 76 is supported by a support member 77 and a chain frame 71 so that the chain 70 can be freely moved back and forth along the bending conveyance path A1. Transport can be performed while preventing clogging and spillage.

  At this time, the movable chain guide 76 that moves back and forth together with the chain 70 is clamped along the chain frame 71 via the upper and lower chain plates 70a when the end side slides in the transport direction along the chain frame 71. The end side that is supported and planarly contacts the frame surface slides while being held in contact with the plurality of chain pins 70b that move in the transport direction. Therefore, this chain detachment prevention mechanism 75 slides and moves the terminal end side of the movable chain guide 76 without damaging the start end side frame surface of the chain frame 71, and smoothly shifts the chain pin 70b to the guide surface. Smooth transportation.

  Further, in the stock transport chain device 23R including the chain detachment prevention mechanism 75 configured as described above, the rotational speed of the chain is restricted to a low speed region in which chain detachment does not occur, and it is difficult to increase the efficiency of the cutting operation. When the bending angle of the bending conveyance path is increased in the conventional stock transport chain device, the amount of sag of the chain facing the bending conveyance path A1 during non-cereal conveyance is also increased. It is possible to eliminate defects such as difficulty in shortening the front and rear length of the cutting part due to restrictions on the bending angle, and difficulty in improving cutting efficiency by regulating the rotation speed of the chain to prevent chain detachment There are features such as.

Next, another embodiment of the chain detachment prevention mechanism 75 will be described with reference to FIG. In addition, about the structure and effect | action similar to the thing of the said embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.
The chain detachment prevention mechanism 75 bends the middle part of the belt-like plate in a U-shape when viewed from above in the movable chain guide 76, so that the end on the folded side is attached to the front end side of the chain frame 71 with a bolt or the like. The bent portion side is brought close to the chain sprocket 72, and the terminal end side of the chain pin guide surface is slidably contacted along the front end side of the chain frame 71. Accordingly, the chain detachment prevention mechanism 75 has the movable chain guide 76 as a long strip, the bent portion and the folded strip plate, and the chain pin guide surface has a large amount of bending in the front-rear direction so that the chain 70 is elastic. Therefore, there is an advantage that it is possible to reliably carry out the transfer of the corn straw with a simple configuration.

  Note that the chain detachment prevention mechanism 75 is not limited to the one that attaches and supports the distal end side of the movable chain guide 76 to the chain frame 71 side as in the illustrated example. For example, as shown in FIG. It may be attached to a support member 77 indicated by a two-dot chain line that extends toward the back of the. In this case, the chain can be moved smoothly while the movable chain guide 76 is attached with a simple structure using the existing support frame 51a without interposing the support member 77 in the space portion of the bending conveyance path A1. Detachment can be prevented.

DESCRIPTION OF SYMBOLS 1 Combine 3 Harvesting part 4 Threshing part 4a Threshing feed chain 11 Pulling device 12 Grain picking device 13 Cutting blade 14 Grain conveying device 20 Starwheel 23R Stock source conveying chain device 31 Drive shaft 70 Chain 70a Upper and lower chain plate 70b Chain pin 71 Stock chain 72 Chain sprocket 76 Movable chain guide 77 Support member A Stud path A1 Bending conveyance path

Claims (2)

The cereals harvested by the cutting blade (13) were provided above the right star wheel (20) from the terminal end of the scraping passage (A) formed by the left and right star wheels (20) rotating by scraping. The chain sprocket (72) and the chain (70) wound around the side stock chain frame (71) are handed over via a bent conveying path (A1) formed in a concave shape on the conveying start end side of the chain (70). In the harvesting part (3) of the combine provided with the stock transport chain device (23R) for nipping and transporting toward the threshing feed chain (4a) side of 4),
From the inner peripheral side of the chain (70) wound between the chain sprocket (72) forming the bending transport path (A1) of the stock transport chain device (23R) and the start end of the chain frame (71). A movable chain comprising a strip spring member that presses the chain pin (70b) flatly toward the front side by a strip-shaped plate surface along the transport direction while entering the space between the upper and lower plates formed between the upper and lower chain plates (70a). A guide (76) is provided, and the movable chain guide (76) elastically presses and urges the chain (70) portion positioned in the bending conveyance path (A1) from the inner peripheral side to the front during non-cereal grain conveyance. And a chain tensioner that restricts the movement in the vertical direction while preventing detachment of the cedar during takeover of the cereal. The reaper of emissions.   The movable chain guide (76) is attached to a support member (77) provided on the side of the chain frame (71) so that the tip side is close to the chain sprocket (72) and the end side is the tip of the chain frame (71). 2. The combine harvester according to claim 1, wherein the combine is slidably supported along the side.

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