JP2021093916A - combine - Google Patents

Abstract

To provide a combine for, when removing grain culm which causes clogging of a merging part of grain culm on right and left root transport units, releasing a transport path on the merging part of grain culm by retreat of a rotary wheel body of one root transport unit, and normally and reversely rotating and driving a root transport chain while preventing tooth jump from a drive sprocket on the root transport chain of the one root transport unit, for reliably releasing a compressed state of grain culm causing clogging.SOLUTION: A combine is configured such that, when regulation of retreat of a rotary wheel body by a regulation body 94 of an opening mechanism for expanding a transport passage of a merging part G2 by retreat of rotary wheel bodies 80a and 80b of one root transport unit 21 is released, in linkage therewith, a tooth jump mechanism 104 is made in a tooth jump inhibition state; on the other hand, when retreat of the rotary wheel bodies is regulated by the regulation body, in linkage therewith, the tooth jump mechanism is made in a tooth jump permission state.SELECTED DRAWING: Figure 7

Description

The present invention relates to a combine that harvests rice, wheat, etc., and more specifically, a grain that is caused by a plurality of raising devices provided in the harvesting section, merges the culms cut by the cutting blade device, and is transported to the threshing section. Regarding the culm transfer device.

The combine that harvests rice, wheat, etc. is caused by a plurality of raising devices and scraping devices provided in the cutting section for the culms of the field, and is harvested by the cutting blade device, and the harvested multiple rows of grains. The culms are merged by the grain culm transport device composed of the left and right tips and the stock root transport device and transported to the threshing section, and the threshing section is further transported from the harvesting section by a handling cylinder equipped with handling teeth, a rocking flow plate, or the like. Grains are threshed and sorted from the culm and harvested.

Then, when the harvesting work is performed efficiently by widening the cutting width with such a combine, a large number of raising devices, scraping devices, tip tips and stock root transporting devices are provided, and the harvested culms can be harvested without delay. It is necessary to transport all of them to the threshing section. For example, in a combine harvester with 5 to 6 rows, 5 to 6 raising devices and scraping devices, and 3 tip and stock origin transporting devices, which are the same number as the number of harvested rows. Is provided.

Further, in this case, in order to transport the culm cut by the five to six raising devices, the scraping device and the cutting blade device to the grain removal section, the right tip and the stock located on the rightmost side of the aircraft on the control section side. In the middle of the transport path of the original transport device, the tip of the ear located in the center and the grain culm transported by the stock transfer device are merged, and the left tip of the tip located on the leftmost side of the machine and the grain culm transported by the stock transfer device are further joined. The culms are merged at the tip of the right tip and the end of the transport path of the stock transfer device, and then the handle depth is adjusted by a handling depth transfer device or the like to transfer the grains to the grain removal section.

However, when the tip of the right tip and the tip of the ear located on the left side in the middle or the end of the transport path of the stock transport device and the culm transported by the stock transport device are merged in this way, it is particularly related to the stock transport device. Since the transport passage at the confluence is not very wide to prevent culms from spilling, the culms tend to be stagnant when a large number of culms try to merge at one time. Then, once a stagnation occurs at this confluence, the transport passage is filled with grain culms and clogged by the subsequent grain culms that are transported one after another, which overloads the stock transfer device and makes it impossible to transport. Fall into.

Therefore, when a large amount of grain culms merge and a grain culm is clogged at the merging portion on the terminal side of the left and right stock culm transport devices where clogging of the culm is likely to occur, the left stock culm transport chain is wound. By retracting the end-side rotating body from the transport passage, the transport passage is opened, the compressed state of the culm clogged in the confluence is released, and the culm can be easily removed from the confluence. If it is still difficult to remove the culm, the left stock culm transport chain is driven in reverse or forward rotation by a manual drive means to move the culm clogged in the confluence to the upstream side or downstream side of the transport. It is known that the compressed state is further released to facilitate the removal of grain culms (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-67263

In the combine described in Patent Document 1 described above, the support plate of the terminal-side rotating body around which the left stock-source transport chain is wound is movably supported with respect to the fixed frame, and the terminal-side confluence of the left and right stock-source transport devices. When the culm is clogged, the movement restriction of the support plate to the front side is released, and the pressure of the clogged culm causes the terminal rotating body to retract from the transport passage together with the left stock culm transport chain. The transport passage is opened to release the compressed state of the clogged culm, making it easier to remove the culm.

If the culm is so clogged that the culm cannot be removed, the left stock culm transport chain is reversely driven by a manual drive means to move the clogged culm from the confluence to the upstream side of the culm. The compressed state is further released to make it easier to remove the culm. Alternatively, the left stock source transport chain is driven in the forward direction by a manual driving means to release the clogged culms from the confluence to the downstream side to further release the compressed state of the culms and facilitate the removal of the culms.

The clogging of the culms at the confluence is not always uniformly determined, and various clogging methods are used depending on the amount of the culms to be transported, the rigidity of the culms, the degree of dryness, and the like. Therefore, depending on the degree of clogging of the culm, the left stock transfer chain is driven in reverse or forward rotation, or is repeatedly driven in forward and reverse rotation, and the best method is selected while observing the decompression state of the culm. Remove the clogged culm.

By the way, when a sprocket is clogged at the merging portion on the terminal side of the left and right sprocket transfer devices, a clogging sensor provided at the merging portion detects the culm clogging, for example, the engine is stopped to stop the left sprocket transport chain. The power transmission to the drive sprocket is cut off, or the operator notices the clogging and cuts off the power transmission to the drive sprocket of the left stock transfer chain by a cutting clutch or the like. However, while the left stock transport chain continues to be driven until the power transmission to the drive sprocket is cut off, the left stock transport chain is forced into a transport stop state due to the clogged culm, where the left stock transport chain is stopped. There is a problem that the sprocket is damaged or the transmission system fails.

Therefore, in order to solve this problem, when an overload is applied to the left stock transport chain due to clogging of the grain, the chain roller of the left stock transport chain separates from the teeth of the drive sprocket (tooth skipping) and the left stock transport chain. In order to prevent damage to the transport chain, for example, the tooth profile of the drive sprocket and the tension force of the tension roller are taken into consideration to facilitate tooth skipping. However, if such a device is applied and the forward / reverse rotation drive of the left stock source transport chain is performed by a manual drive means when removing the clogged grain culm, the left stock is caused by the load remaining in the left stock source transport chain. Similarly, there arises a problem that the original transport chain cannot be driven by forward / reverse rotation due to tooth skipping.

Further, in this case, the left stock transfer chain is in a slack state due to the opening of the transfer passage at the confluence, and the slack of this chain is absorbed by the tension operation of the tension roller due to the forward / reverse rotation drive of the left stock transfer chain. However, the tension of the chain is reduced by the operation of this tension roller, and especially when trying to reverse drive the left stock transport chain, the tension roller on the tension side of the chain rises and the drive sprocket of the left stock transport chain is lifted. There is a problem that the left sprocket transfer chain cannot be reversely driven because the amount of wrapping with the wheel is reduced to cause tooth skipping.

Therefore, in the present invention, when removing the grain culms stuck in the confluence of the grain culms of the left and right stock culms, the transport passage at the confluence of the culms is retracted by the rotating wheel of one of the stock culms. Release and drive the stock transfer chain in the forward and reverse directions while preventing tooth skipping from the drive sprocket of the stock transfer chain of one of the stock transfer devices, ensuring that the clogged culm is released from the compressed state. The challenge is to provide a combine that can be done in.

In order to solve the above-mentioned problems, the present invention firstly comprises left and right stock transfer devices including a drive sprocket, a rotating wheel body, a tension wheel body, and a stock transfer chain wound around them, and left and right stock transfer devices. An opening mechanism that expands the transport passage at the confluence of the grain of the device by retracting the rotating wheel of one of the stock transport devices, a drive mechanism that rotates the drive sprocket of the stock transfer device in the forward and reverse directions, and a stock transfer chain. It is equipped with a tooth skipping mechanism that allows or prevents disengagement at the meshing portion with the drive sprocket, and in order to remove the clogged grain when the confluence of the left and right stock transfer devices is clogged. When the restriction on the retreat of the rotating wheel body by the regulating body of the opening mechanism is released, the tooth skipping mechanism is set to the tooth skipping prevention state in conjunction with this, while when the retreating of the rotating wheel body is regulated by the restricting body, this is achieved. It is characterized in that the tooth skipping mechanism is set to the tooth skipping allowable state in conjunction with each other.

Secondly, the present invention has a tooth skip prevention state in which the tooth skip prevention body facing the meshing portion of the stock transfer chain with the drive sprocket is close to the chain roller of the stock transfer chain and faces between the upper and lower link plates. The tooth skipping mechanism is configured by being movably provided in a tooth skipping allowable state away from the chain roller and away from the upper and lower link plates, and the rotating wheel body is attached to the transport frame of the stock transfer device. Is movably mounted, and the mounting frame is rotatably supported on the transport frame and rotated by an operation lever. A state in which the retreat of the rotating wheel body is restricted by contact with a restricting body and a state in which the restriction is released. The opening mechanism is configured by being switchable to the above, while the regulating body of the opening mechanism and the tooth skipping prevention body are connected via a link, and the regulating body of the opening mechanism and the tooth skipping mechanism are interlocked with each other. To do.

Further, the present invention thirdly provides a holding means for rotating the restricting body whose retreat restriction of the rotating wheel body is released by the operating lever to a predetermined release position, and the holding means appropriately secures the tooth skipping prevention body. It is characterized by moving to a state where tooth skipping is prevented. Fourth, in the present invention, the tooth skipping prevention body is movably provided by guiding the tooth skipping prevention body to the backrest portion of the transport frame along the tangential direction at the meshing portion with the drive sprocket of the stock origin transport chain to prevent the tooth skipping. It is characterized in that the reaction force from the stock transfer chain side applied in the state of preventing tooth skipping of the body is received by the back support portion of the transfer frame.

According to the combine of the present invention, the confluence of the left and right stock transfer devices including the drive sprocket, the rotating wheel body, the tension wheel body, and the stock transfer chain wound around them, and the grain of the left and right stock transfer devices. In the meshing portion between the opening mechanism that expands the transport passage in one of the stock transport devices by retracting the rotating wheel body, the drive mechanism that rotates the drive sprocket of the stock base transport device in the forward and reverse directions, and the drive sprocket of the stock base transport chain. A tooth skipping mechanism that allows or prevents detachment is provided, and when a sprocket is clogged at the confluence of the left and right sprocket transport devices, the clogged sprocket is removed by the regulator of the opening mechanism. When the restriction on the retreat of the rotating wheel body is released, the tooth skipping mechanism is set to the tooth skipping prevention state in conjunction with this, while when the retraction of the rotating wheel body is regulated by the restricting body, the tooth skipping mechanism is interlocked with this. Allows tooth skipping.

Therefore, when removing the clogged culms at the confluence of the culms of the left and right stock culms, the transport passage at the confluence of the culms is expanded by retracting the rotating wheel of one of the stock culms, and also Drive of the stock transfer chain of the stock transfer device While preventing tooth skipping from the sprocket by the tooth skip mechanism, the stock transfer chain is reliably driven in the forward and reverse rotations to release the compressed state of the clogged culm. The work of removing the grain culms stuck in the confluence can be performed quickly with less labor.

In addition, this tooth skipping mechanism sets the tooth skipping prevention state in conjunction with the release of the restriction on the retreat of the rotating wheel body by the regulating body of the opening mechanism, while restricting the retreating of the rotating wheel body by the regulating body. Since the tooth skipping is allowed in conjunction with each other, when removing the grain clogging at the confluence, the tooth skipping mechanism is set to the tooth skipping prevention state by the regulator, while the regulator is removed after the grain removal work is completed. When the original rotating wheel body is returned to the restricted state of retreat, the tooth skipping mechanism can be returned in conjunction with the tooth skipping allowable state.

Therefore, it is not necessary to perform a troublesome switching operation as if the tooth skipping mechanism is independently switched between the tooth skipping allowable state and the tooth skipping allowable state. On the other hand, it is possible to prevent damage to the stock transport chain and the like caused by the tooth skipping of the stock transport chain.

Further, according to the combine of the present invention, the tooth skip prevention body facing the meshing portion with the drive sprocket of the stock transfer chain is close to the chain roller of the stock transfer chain to prevent tooth skipping between the upper and lower link plates. The tooth skipping mechanism is configured by being movably provided in a state and a tooth skipping allowable state that is separated from the chain roller and away from the upper and lower link plates, and a rotating wheel body is attached to the transport frame of the sprocket transfer device. The frame is movably mounted, and the mounting frame is rotatably supported on the transport frame and rotated by the operation lever. While the opening mechanism is configured so as to be switchable to a state, the regulating body of the opening mechanism and the tooth skipping prevention body are connected via a link, and the regulating body of the opening mechanism and the tooth skipping mechanism are interlocked with each other.

Therefore, the tooth skipping prevention body that constitutes the tooth skipping mechanism is in a state of preventing tooth skipping that faces between the upper and lower link plates in close proximity to the chain roller of the stock source transport chain facing the meshing portion with the drive sprocket of the stock source transport chain. With a very simple structure that is movably provided in a tooth skipping allowable state that is separated from the chain roller and away from the upper and lower link plates, it can be configured to fully fulfill its role, and the opening mechanism is regulated. Even if it is interlocked with the body, both are only connected via a link, so that it is possible to suppress an increase in the cost of the stock transfer device due to the addition of a new tooth skipping mechanism.

Further, according to the combine of the present invention, a holding means for rotating the restricting body whose retreat restriction of the rotating wheel body is released by the operating lever to a predetermined release position is provided, and the tooth skipping prevention body is provided by the holding means. Move to a proper tooth skip prevention state. Therefore, by this holding means, the retreat of the rotating wheel body can be smoothly retreated without being hindered by the regulator, and the transport passage at the confluence of the grain culms can be expanded. Further, when the restricting body rotates to a predetermined release position, the tooth skipping prevention body moves to an appropriate tooth skipping prevention state and can be held in an appropriate position by the holding means, whereby the teeth of the stock transfer chain can be held. You can surely prevent the flight.

Then, according to the combine of the present invention, the tooth skipping prevention body is movably provided by guiding the tooth skipping prevention body to the back support portion of the transport frame along the tangential direction at the meshing portion with the drive sprocket of the stock origin transport chain. The back support portion of the transport frame receives the reaction force from the stock transport chain side applied in the tooth skipping prevention state of the preventive body.

Therefore, the tooth skipping prevention body can be guided to the back support portion of the transport frame and smoothly moved to the tooth skipping prevention state and the tooth skipping allowable state. In addition, the reaction force from the stock transport chain side applied when preventing tooth skipping can be received by the backrest portion, and it is not necessary to strengthen the tooth skipping prevention body to withstand this reaction force, and tooth skipping is not required. The preventive body can be manufactured at low cost. Further, the operating load of the operating lever that rotates the regulating body and moves the tooth skipping prevention body can be suppressed by reducing the weight of the tooth skipping prevention body.

It is a side view of the combine to which this invention is applied. It is a top view of the combine. It is a perspective view which shows the structure of the input shaft of a cutting part. It is a top view of the stock origin transfer apparatus. It is a route diagram of stock transfer. It is a power transmission diagram of a cutting part. It is a top view of the left stock transfer apparatus. It is the bottom view of the left stock transfer apparatus. It is a side view of the main part of the left stock transfer device. It is a top view of the left stock transfer apparatus which shows the state which the regulation of the opening mechanism was lifted. It is the bottom view of the left stock origin transfer apparatus which shows the state which the regulation of the opening mechanism was lifted. It is a perspective view of the handling depth transfer apparatus. It is a perspective view which shows the state which the holding rail is removed from the handling depth transfer apparatus.

Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the 6-row harvesting self-removing combine 1 that threshes while cutting rice and wheat is left and right below the body frame (body) 2 that is framed in a substantially rectangular shape via a traveling frame 3. The crawler traveling device 4 of the above is provided. The left and right crawler traveling devices 4 include a drive sprocket 6 attached to a drive shaft protruding from the left and right of the transmission case 5, an idle wheel 7 and a track roller 8 pivotally supported by the traveling frame 3, and a rubber crawler wound around the drive sprocket 6. 9 is provided.

Further, a substantially rectangular driving frame is integrally connected to the front right side of the airframe 2 in the forward direction of the airframe, and a control unit 10 is provided over the operating frame and the airframe 2 behind the operating frame 2. The control unit 10 has a driver's seat behind the floor, a front console (front operation panel) on the front of the floor, and a side console (side operation panel) on the left side of the floor and the driver's seat. Further, the cabin 11 covers the control unit 10.

Further, the cutting portion 12 is provided so as to be able to move up and down from the left front portion of the machine frame 2 to the front of the control portion 10 by a hydraulic cylinder (not shown). Then, the cutting section 12 divides the napped culm in the field into a cut culm and an uncut culm by a weed body 13 and a narrow guide 14 provided at the lower part of the front end thereof, and enters between the left and right weed culms 13. The harvested culm is raised by a pulling device 15 provided with a raising claw, and then, as shown in FIGS. 3 to 5, the culm is gathered by a scraping device 18 composed of a scraping belt 16 with protrusions and a star wheel 17. The culm is cut by the culm cutting blade device 19.

Further, the grain culms cut and cut by the cutting blade device 19 are sent backward by the star wheel 17 of the scraping device 18, and the grain culms sent backward are provided on the left, right, and center of the stock transfer device 20. It is taken over by 21 and 22 and transported further backward. Then, the terminal portion of the stock source transport device 22 provided in the center faces the merging portion G1 provided in the middle of the transport path of the right stock source transport device 20, and the grain culms transported by the middle stock source transport device 22 merge in the middle. It merges with the grain culm transported by the right stock transfer device 20 in the unit G1, and is subsequently taken over by the right stock transfer device 20.

On the other hand, the terminal portion of the stock source transport device 21 provided on the left side faces the terminal portion of the transport path of the right stock source transfer device 20, and the grain culm transported by the left stock source transfer device 21 is transferred by the right stock source transfer device 20. The transported grain culm joins at the merging portion G2 which is the terminal portion of both the transporting devices 20 and 21. Further, the merged grain culms are handed over to the handling depth transfer device 23 having the starting end portion facing the both merging portions G2, and are further conveyed rearward and upward.

Then, the grain culm handed over to the handling depth transport device 23 is handed over to the threshing feed chain 25 from the terminal portion of the handling depth transport device 23 via the auxiliary transport device 24. Although the transport route on the stock root side of the grain culm has been mainly described so far, the tip side of the grain culm is provided on the upper side of the right stock root transport device 20, the handling depth transport device 23, and the auxiliary transport device 24. The tip transfer device 26, and the transfer claws attached to each of the transfer chains (see FIG. 6) of the left scrap transfer device 27 and the middle scrap transfer device 28 provided on the upper side of the left stock transfer device 21 and the middle stock transfer device 22. Locked to and transported.

Further, the threshing section 29 is provided on the left side of the machine frame 2 behind the cutting section 12, and the first and second handling chambers are provided below the cylinder cover 30 that covers the upper part. Among them, in the first handling chamber, a threshing field chain 25 and its holding rail 31 for transporting the culm transported from the cutting section 12 along the handling port, a first handling cylinder provided with handling teeth and its receiving net, etc. Is provided. In addition, the second handling chamber is attached to the first handling chamber so as to face the rear of the machine from the rear end tip side of the first handling cylinder, and the straw waste mixed with grains that could not be threshed in the first handling chamber. A second handling cylinder for processing and the like and a receiving net thereof are provided.

On the other hand, a sorting chamber is provided below the first and second handling chambers. The sorting chamber is provided with a oscillating flow plate, No. 1 and No. 2 spirals, a wall insert fan, a suction fan, etc., and grains and the like leaking from the receiving net of the handling chamber are placed on the oscillating flow plate. The sorted grains are transferred from the No. 1 spiral to the Glen tank 33 via the grain raising device 32, and the No. 2 product mixed with straw debris and the like is oscillated from the No. 2 spiral through the No. 2 reduction device. Put it back on the board.

Further, the straw debris reaching the end of the rocking flow plate, the straw debris captured by the suction fan, or the straw debris discharged from the end of the second handling cylinder is discharged to the outside of the machine behind the threshing section 29. Further, the culm discharged from the handling room after the threshing process is completed is conveyed toward the disc type cutter 35 by the straw discharging transport device 34, and the disc type cutter 35 is conveyed by the straw discharging transport device 34. Shred the culm and release it as cut straw to the site where it was cut.

Then, the grain tank 33 is provided further behind the driving part 37 composed of the diesel engine 36 and the like provided behind the control part 10, and temporarily stores the grains transferred by the grain raising device 32. When the grain tank 33 is full of grains, the discharge auger 38 is operated to discharge the grains from the grain tank 33 and discharge the grains to a container or the like outside the machine.

The discharge auger 38 includes a vertical pipe containing a horizontal spiral and a vertical spiral provided at the bottom of the grain tank 33, and the vertical pipe is rotatably erected behind the grain tank 33 by an auger swivel motor. It is composed of a vertical pipe 39 and a second vertical pipe 42 which can be raised and lowered by a hydraulic cylinder 41 on the upper portion of the first vertical pipe 39 via a gear case 40.

The outline of the combine 1 has been described above. Next, the cutting section 12 will be described in more detail. As shown in FIG. 1, the cutting section 12 is located at the rear part of the upper part of the support column provided near the left front part of the machine frame 2. The transmission frame 43 is composed of a pipe case that is rotatably attached to the side and is connected in a substantially U-shape in which the front side is raised and lowered in the vertical direction by a hydraulic cylinder, and a vertical transmission cylinder that is connected to the lower left portion of the pipe case. Further, a preprocessing frame 44, a support frame, or the like is attached to the front portion of the transmission frame 43.

Further, the transmission frame 43, the pretreatment frame 44, the support frame, and the like include a pulling device 15, a scraping device 18, a cutting blade device 19, a stock source transfer device 20, 21, 22, and a handling depth transfer device 23. Each device such as the auxiliary transfer device 24, the tip transfer device 26, and the scraping transfer device 27, 28, the weed body 13, the side cover 45, the tip guide plate 46, the hood 47, etc. are attached.

A transmission shaft provided with a bevel gear is pivotally supported in the transmission frame 43, and as shown in FIG. 6, the engine 36 provided in the driving portion 37 is a grain-removing clutch 48 composed of a belt tension clutch and a continuously variable transmission HST (hydrostatically variable transmission type). The input shaft 51 provided in the input transmission unit 43a of the transmission frame 43 is driven via the cutting clutch 50 composed of the step transmission) 49 and the belt tension clutch, and then the vertical transmission unit 43b, the tip / auxiliary transport transmission unit 43c, Each device is driven from the right stock transmission unit 43d, the handling depth transmission unit 43e, the middle stock transmission unit 43f, the lower transmission unit 43g, the left stock transmission unit 43h, and the raising transmission unit 43i.

As shown in FIG. 3, the input shaft 51 provided in the above-mentioned input transmission unit 43a extends its left end side and projects outward through a hole formed in the guide 25a of the threshing field chain 25. Further, the end portion 51a of the input shaft 51 is formed as a hexagonal shaft, and a tool such as a socket wrench 52 can be attached to the hexagonal shaft to rotate the input shaft 51 in the forward and reverse directions by manual operation.

Therefore, when the culm is clogged in the cutting unit 12, particularly the stock-source transporting devices 20, 21 and 22, as will be described later, when the stock-source transporting chains of these transporting devices 20, 21 and 22 are cut. As described above, it is driven toward the downstream side or toward the upstream side in the opposite direction, whereby the culm is moved and the work of removing the culm is facilitated. When no manual operation is performed, a cap 53 is attached to the hole of the guide 25a to cover the end portion 51a of the input shaft 51.

Further, as shown in FIGS. 4 to 6, the above-mentioned stock bearing transfer devices 20, 21 and 22 form an endless band by connecting a large number of upper and lower link plates P with protrusions with pins N for mounting the chain rollers R. It is composed of a stock transfer chain, a drive sprocket, a driven sprocket, a roller rotatably provided by a bearing, a tension roller rotatably provided by a bearing, a tension spring, a transfer frame, a rail, a holding rod, and the like.

Therefore, to explain each of the stock transfer devices 20, 21 and 22 in detail, first, the right stock transfer device 20 includes a drive sprocket 54 provided on the right stock transmission unit 43d and a transmission frame 43 (lower transmission unit 43g). The right holder 56 is attached to the driven sprocket 55 provided to drive the scraping device 18 provided near the right end, the transmission frame 43 (right stock transmission unit 43d) on the drive sprocket 54 side, and the scraping device 18 on the driven sprocket 55 side. A right sprocket transfer frame 57 to be attached via the sprocket is provided.

Further, in the right stock transfer frame 57, the tip end portion of the pipe frame 59 is attached to the front frame 58 thereof, and the upper plate 60 is fixed to the rear end portion of the pipe frame 59. Further, the lower plate 61 is attached to the upper plate 60 via the roller attachment shaft. Further, two fixed rail plates 62a and 62b that come into contact with the chain roller R are fixedly provided on the front frame 58. Further, one fixed roller 63a is provided on the pipe frame 59, two fixed rollers 63b and 63c are provided between the upper plate 60 and the lower plate 61, and a tension roller provided at the tip of an arm 64 that rotatably supports the shaft. 65 and a tension coil spring 66 that applies tension to the tension roller 65 are provided.

Then, the right stock transfer device 20 is provided on the drive sprocket 54, the driven sprocket 55, the three fixed rollers 63a, 63b, 63c, and the tension roller 65 provided on the right stock transfer frame 57, and the right stock transfer chain. Wrap 67. Further, the right stock transfer device 20 includes a movable guide rail 68 that guides the right stock transfer chain 67, and the movable guide rail 68 encloses the rail plate 68a that abuts on the chain roller R and the link plate P of the chain. It is composed of upper and lower guide plates 68b that guide the upper and lower sides.

Then, the movable guide rail 68 is attached by rotatably supporting the start end side of the movable guide rail 68 on the front frame 58, and is connected to the lock pin 69 provided over the upper and lower plates 60 and 61. Further, the lock pin 69 swings to two positions by the vertical movement and the rotation operation of the operation lever 70, whereby the movable guide rail 68 has the operation lever 70 at the end side centered on the shaft fulcrum a near the start end. It is possible to switch to the retracted posture of retreating from the transport passage. Therefore, as will be described later, when the confluence G1 of the right stock transfer device 20 and the middle stock transfer device 22 is clogged with the grain culm, the movable guide rail 68 is switched to the retracted posture by the operation lever 70 to transport the grain culm. The passage can be widened to facilitate the work of removing the culm.

A pinching rod 71 and a guide rod 72 are provided in the transport path in front of the right stock source transport chain 67, and the pinching rod 71 and the guide rod 72 are frames for attaching the second and third scraping devices 18 from the right. Attached to the holder 74 provided in the 73, the holding rod 71 is urged by the compression coil spring provided in the holder 74 so as to face between the link plates P of the right stock carrying chain 67, and holds the grain culm together with the right stock carrying chain 67. To do. Further, the guide rod 72, following the holding rod 71, presses the grain culm toward the right stock transfer chain 67 side by its own elasticity.

Next, the left stock transfer device 21 will be described. As shown in FIGS. 7 to 11, the left stock transfer device 21 has a drive sprocket 75 provided in the left stock transmission unit 43h and a drive shaft of the drive sprocket 75. A tension arm 76 that is rotatably attached to a transmission frame 43 that supports the shaft, a tension roller 77 that is attached to the tip of the tension arm 76, a tension coil spring 78 that applies tension to the tension roller 77, and a transmission frame 43 (lower transmission). A driven sprocket 79 provided for driving the scraping device 18 provided near the left end of the portion 43 g) is provided.

Further, the left stock transfer device 21 includes a left stock transfer frame 82 for mounting one fixed roller 80c and a guide rail 81, a mounting frame 84 for mounting the terminal fixed rollers 80a and 80b, a guide rod 83, and the like, and a drive sprocket. A 75, a tension roller 77, a driven sprocket 79, and a left stock transfer chain 85 to be wound around the fixed rollers 80a, 80b, 80c are provided. Of these, the left stock transfer frame 82 integrally includes a flat plate portion 82a attached to the transmission frame 43 of the left stock transmission portion 43h and a square pipe portion 82b attached to the transmission frame 43 of the raising transmission portion 43i via a stay 86. It is fixed and configured.

Then, the fixing roller 80c is attached to the flat plate portion 82a of the left stock transfer frame 82 so as to be located behind the drive sprocket 75. Further, a support 88 is attached to the side surface of the square pipe portion 82b to fix the rail plate 87 to which the chain roller R of the left stock transport chain 85 abuts at the tip, and the link plate of the left stock transport chain 85 is attached to the support 88. A guide plate 89 that confine P and guides the top and bottom of the chain is attached to form a guide rail 81.

On the other hand, the mounting frame 84 for mounting the fixing rollers 80a and 80b on the terminal side and the guide rod 83 and the like has a base portion 84a in which the lower part of the U-shaped channel material is closed by the bottom plate 84b and upper and lower portions fixed to the rear portion of the base portion 84a. The mounting plates 84c and 84d are provided, and the fixing rollers 80a and 80b on the terminal side are sandwiched between the upper and lower mounting plates 84c and 84d. Further, above and below the mounting plates 84c and 84d, upper and lower entanglement prevention plates 90a and 90b are mounted together with the fixing rollers 80a and 80b.

Further, a limit switch 91 and a pressure sensitive plate 92 for operating the actuator of the limit switch 91 are attached to the upper entanglement prevention plate 90a to form a clogging sensor. Further, a guide rod 83 is attached to the bottom plate 84b of the mounting frame 84 via a bracket, and the guide rod 83 pulls the grain culm away from the chain at the end of the left stock transfer chain 85 to the right stock transfer device 20 side. Provided so that it can be taken over.

Then, the mounting frame 84 described above is fitted by inserting the base portion 84a into the square pipe portion 82b of the left stock transfer frame 82 from the rear, and is movably mounted along the longitudinal direction of the square pipe portion 82b. More specifically, the left and right fixed shafts orthogonal to the longitudinal direction of the square pipe portion 82b are fixed inside the square pipe portion 82b of the left stock transfer frame 82, and the base portion 84a of the mounting frame 84 and its bottom plate thereof are fixed. The 84b is provided with an elongated hole h corresponding to one of the left and right fixed shafts.

Therefore, when the mounting frame 84 externally fitted to the square pipe portion 82b is moved and the fixing bolt 93 with a lever is screwed onto the fixed shaft from above and below through the elongated hole h, the mounting frame 84 is immovably fixed to the square pipe portion 82b. be able to. In this case, if the fixing bolt 93 with a lever is screwed onto one fixed shaft from above and below, the mounting frame 84 may swing around the fixed shaft and the fixing bolt 93 with a lever may loosen. When the fixing bolts 93 with levers are screwed to each fixing shaft by separating them from each other, the mounting frame 84 can be eliminated from swinging and the fixing bolts with levers 93 can be eliminated from loosening.

Further, when the above-mentioned fixing bolt 93 with a lever is removed, the mounting frame 84 can move along the square pipe portion 82b, but if the mounting frame 84 is regulated by the regulating body 94 described below, the mounting frame 84 moves forward. Cannot move. That is, the bracket 95 is attached to the mounting seat 82c having a U-shaped cross section provided by welding below the square pipe portion 82b, and the shaft portion 94a of the regulator 94 formed in an L shape is rotatably attached to the bracket 95. A roller 96 is attached to the tip of one short side of the regulator 94 via the attachment shaft 97, and the other long side is used as the operating lever 98.

Further, a tension coil spring 99 is mounted between the mounting shaft 97 of the roller 96 and the locking portion 95a of the bracket 95, and the end surface of the regulator 94 on the long side abuts on the mounting seat 82c by the tension coil spring 99. The fulcrum is crossed so as to switch between the regulated position and the release position where the mounting shaft 97 of the roller 96 abuts on the end surface of the bracket 95.

Therefore, when the regulator 94 is switched to the above-mentioned regulation position and the roller 96 of the regulator 94 is in contact with the end surface of the bottom plate 84b of the mounting frame 84, the movement of the mounting frame 84 to the front side is performed. It is blocked by the regulator 94 and becomes impossible. Further, when the restricting body 94 is operated to the release side (release position) by the operation lever 98, the roller 96 can move away from the end surface of the bottom plate 84b to the front side of the mounting frame 84. However, when the end surface of the bottom plate 84b comes into contact with the roller 96 at the release position, the movement of the mounting frame 84 to the front side is prevented from further movement to the front side.

Further, when the restricting body 94 is operated by the operating lever 98 from the release position to the restricting position, the mounting frame moves forward by pushing the end surface of the bottom plate 84b after the roller 96 comes into contact with the end surface of the bottom plate 84b. The 84 can be returned to the original rear regulation position. The pinching rod 100 that presses the grain toward the left stock transport chain 85 guided by the guide rail 81 and the guide rod 101 that guides the grain culm following the pinching rod 100 are the fourth from the right. It is attached to the holder 103 provided on the frame 102 to which the fifth scraping device 18 is attached.

Then, as described above, the fixing rollers 80a and 80b on the terminal side and the mounting frame 84 for mounting the guide rod 83 and the like are movably provided on the left stock transfer frame 82 to form an opening mechanism, and the opening mechanism is regulated. When the body 94 is configured to prevent or allow the movement of the mounting frame 84 to the front side, the left side facing the confluence G2 on the transport end side of the right stock transfer device 20 and the left stock transfer device 21. It is possible to switch to a state in which the regulation of the retreat of the fixed rollers 80a and 80b on the terminal side of the stock transfer device 21 from the transfer passage and the restriction of the retreat are released to expand the transfer passage.

Therefore, when the culm is clogged in the confluence G2 on the transport end side of the right stock transfer device 20 and the left stock transfer device 21, the transport passage of the confluence G2 is expanded to describe the clogged culm as described later. It can be easily removed. Further, when the regulator 94 is operated to the regulated position by the operation lever 98, the transport passage can be narrowed as before, so that the work of removing the grain culm can be completed relatively easily and the cutting work can be resumed promptly. can do.

The basic structure of the left stock transfer device 21 has been described above. Next, the tooth skipping mechanism of the left stock transfer chain 85 newly attached to the left stock transfer device 21 will be described. The drive sprocket 75 of 21 has a reduced tooth depth and is gently inclined from the tooth bottom to the tooth tip, and when an overload is applied to the left stock transfer chain 85, the chain roller R is lifted from the tooth tip. A detachable tooth profile is used to prevent damage to the left stock transfer chain 85, drive sprocket 75, and the like. Further, the urging force of the tension coil spring 78 of the tension roller 77 that applies tension to the left stock transfer chain 85 is set to be small to promote the above-mentioned tooth skipping.

Then, the grain culm is clogged at the confluence G2 of the grain culms of the right stock transfer device 20 and the left stock transfer device 21, and the terminal side of the left stock transfer device 21 is used to remove the clogged grain culm. When the restriction on the retreat of the fixed rollers 80a and 80b from the transport passage is released by the operation lever 98, the left stock transfer chain 85 is pushed from the compressed culm and loosens. Further, when the drive sprocket 75 is manually rotated in the forward and reverse directions using a tool such as a socket wrench 52 in order to facilitate the removal of the clogged culm in that state, the slack of the left stock transfer chain 85 is finally slackened. Although it is absorbed by the operation of the tension roller 77, the tension of the left sprocket transfer chain 85 is lowered and the teeth are easily skipped.

Further, when the drive sprocket 75 is manually rotated in the reverse direction, the tension roller 77 side is located on the tension side, and the tension roller 77 is lifted, so that the amount of winding of the chain is reduced and the teeth are more easily skipped. Therefore, if a load remains on the left stock transfer chain 85 due to the clogged culm, the left stock transfer chain 85 skips from the drive sprocket 75 and drives the left stock transfer chain 85 in the forward and reverse rotations. This makes it difficult to remove the clogged culm.

Therefore, the newly adopted tooth skipping mechanism of the left stock transport chain 85 allows tooth skipping due to overload of the left stock transport chain 85 during the cutting work, and also during the removal work of the clogged culm. The tooth skipping of the left stock transfer chain 85 is configured to prevent this. More specifically, a tooth skipping prevention body 104 for preventing the left stock transfer chain 85 from coming off from the drive sprocket 75 at the meshing portion with the drive sprocket 75 is provided, and the tooth skipping prevention body 104 is placed in a tooth skipping prevention state and teeth. A tooth skipping mechanism is configured by being movably provided in a jumping allowable state.

Specifically, when the chain roller R of the left stock transfer chain 85 tries to rise from the teeth of the drive sprocket 75, the plate comes into contact with the chain roller R to prevent the chain roller R from coming off. The working portion 104a, which is the tip of the tooth skipping prevention body 104 formed by bending the tooth skipping prevention body 104, is formed to be slightly wide. Then, when the tooth skipping prevention body 104 is moved to the tooth skipping prevention state, the action portion 104a of the tooth skip prevention body 104 is provided as a chain roller R of the left stock transfer chain 85 so as to face between the upper and lower link plates P, and the teeth. When the tooth skipping prevention body 104 is moved to the jumping allowable state, the acting portion 104a of the tooth skipping prevention body 104 is provided so as to be separated from the chain roller R of the left stock transfer chain 85 and away from the upper and lower link plates P.

Further, when moving the tooth skipping prevention body 104 to the two positions in this way, the tooth skipping prevention body 104 is moved along the tangential direction at the meshing portion with the drive sprocket 75 of the left stock transfer chain 85. In this case, a guide body 105 having a rectangular notch groove 105a is attached to the flat plate portion 82a of the left stock transfer frame 82 at a predetermined interval, and teeth are attached to the notch groove 105a of the guide body 105. The tooth skipping prevention body 104 is movably supported through the jumping prevention body 104. Further, the back rest portion 106 formed by bending the end portion of the flat plate portion 82a is provided so that the end face of the tooth skipping prevention body 104 is in contact with the back rest portion 106, and is added when preventing tooth skipping. The force is received by the back support portion 106.

Further, when the tooth skipping mechanism is configured by the tooth skipping prevention body 104 as described above, the tooth skipping mechanism is moved to the tooth skipping allowable state at the time of cutting work and to the tooth skipping prevention state at the time of removing the clogged culm. It is necessary, and if this is not selected correctly at all times, there is no point in providing a tooth skipping mechanism. Therefore, the tooth skipping mechanism is set to the tooth skipping prevention state in accordance with the expansion operation of the transport passage at the confluence portion G2 of the grain culms performed at the time of the removal work of the clogged culms, and the original culm removal work is completed. When returning to the transport passage, return to the tooth skipping allowable state.

Therefore, the tooth skip prevention body 104 has one end of the link 107 attached to the operation portion 104b which is the rear end thereof, and the other end of the link 107 is attached to the long side of the regulation body 94 on the operation lever 98 side, and is regulated by the operation lever 98. When the body 94 lifts the restriction on the movement of the mounting frame 84 to the front side (when the restriction on the retreat of the fixed rollers 80a and 80b from the transport passage is lifted), the action portion 104a of the tooth skipping prevention body 104 changes to the chain roller. When it moves to a position close to R and faces between the upper and lower link plates P, and conversely, the control body 94 returns the mounting frame 84 to the original rear side regulation position by the operation lever 98 and reaches the regulation position (fixed roller 80a). , 80b is restricted from retreating from the transport passage), the action portion 104a of the tooth skipping prevention body 104 is connected so as to move away from the chain roller R and away from the upper and lower link plates P.

Then, when the tooth skipping prevention body 104 and the regulation body 94 are interlocked in this way, when the regulation body 94 is operated by the operation lever 98, the tension coil spring 99 (holding means) provided on the regulation body 94 crosses the fulcrum. Restricted position where the end surface on the long side of the restricting body 94 abuts on the mounting seat 82c (The roller 96 of the regulating body 94 abuts on the end surface of the bottom plate 84b of the mounting frame 84, and the movement of the mounting frame 84 to the front side is restricted. (Position) and the release position where the mounting shaft 97 of the roller 96 abuts on the end face of the bracket 95 (the position where the restriction on the movement of the mounting frame 84 to the front side is released). The acting portion 104a of 104 can be reliably moved and held at the tooth skipping allowable position and the tooth skipping prevention position.

Further, in this case, for example, when the tooth skipping prevention body 104 and the mounting frame 84 are connected and the mounting frame 84 moves to the front side, the tooth skipping prevention body 104 is in the tooth skipping prevention state, and conversely, the mounting frame 84 is in the original rearward position. It is also conceivable that the tooth skipping prevention body 104 is interlocked so as to be in the tooth skipping allowable state when returning to the side. However, even if the restricting body 94 lifts the restriction on the movement of the mounting frame 84 to the front side, the mounting frame 84 does not always move to the front side by a certain amount, so that the tooth skipping prevention body 104 prevents tooth skipping. There is no guarantee that it will move reliably to the position, and it is difficult to adopt such an interlocking structure.

The tooth skipping mechanism of the left sprocket transfer chain 85 has been described above. Next, the middle sprocket transfer device 22 provided in the center will be described. As shown in FIGS. 4 to 6, the middle sprocket transfer device 22 is a middle sprocket. A drive sprocket 108 provided on the original transmission portion 43f, a tension arm rotatably attached to a transmission frame 43 that pivotally supports the drive shaft of the drive sprocket 108, a tension roller 109 attached to the tip of the tension arm, and a tension roller. A tension coil spring that applies tension to 109, a driven sprocket 110 that is provided to drive the fourth scraping device 18 from the right side of the transmission frame 43 (lower transmission portion 43g), and a frame 102 that mounts the scraping device 18. The fixed roller 111 provided in the above is provided.

The middle stock transfer device 22 includes a drive sprocket 108, a tension roller 109, a driven sprocket 110, and a middle stock transfer chain 112 that winds around the fixed roller 111, and the middle stock transfer chain 112 attaches a scraping device 18. Guided by the guide rail 113 attached to the frame 102, and attached to the holder 114 provided on the frame 73 to which the second and third scraping devices 18 from the right are attached, the sprocket is sandwiched by the holding sprocket 115 and the guide sprocket 116 to the right. It is transported toward the confluence portion G1 with the stock transfer device 20. The fixed roller 111 provided on the frame 102 to which the above-mentioned scraping device 18 is mounted is provided with entanglement prevention plates 117 above and below the frame 102, and further, a right stock transfer chain is provided at the transfer end of the middle stock transfer chain 112. A guide rod 118 for inheriting the grain culm toward 67 is attached to the frame 102 and provided.

Next, the handling depth transfer device 23 that transfers the left and right sprocket transfer devices 20 and 21 from the terminal portions to the threshing section 29 by adjusting the handling depth will be described as shown in FIGS. 12 and 13. The handling depth transfer device 23 includes a drive sprocket 119 provided in the handling depth transmission portion 43e and a guide rail 120a for rotatably attaching the tip portion to the transmission frame 46 that pivotally supports the drive sprocket 119. 120, a roller 122 provided at the rear end of the transport frame 120 via a bracket 121, a handling depth transport chain 123 with a protrusion wound around the drive sprocket 119 and the roller 122, a cover 124, and the like are provided.

Further, the handling depth transfer device 23 is an electric motor that moves the rear end portion up and down with the drive sprocket 119 at the start end portion as the center of rotation, and the handling depth control that operates the electric motor by the handling depth sensor S or a manual switch. Equipped with a device. Further, the holding rail 125 provided so as to face the handling depth transfer chain 123 is provided with a mounting seat 126a at the other end of the U-shaped pipe 126 for attaching one end to the rear end portion of the transport frame 120, and the mounting seat 126a is provided with the mounting seat 126a. It is attached to the holder 127 which is detachably attached.

That is, the holding rail 125 is formed by fixing the inlet guide rod 125b to the tip of the rail body 125a, and the rod 125c attached to the rail body 125a is supported by the holder 127, and the compression coil spring 128 provided in the holder 127. Bounces towards the handling depth transport chain 123. Further, the holder 127 is provided with a lock plate 130 that is slid by the operation lever 129 and a bolt with a knob 131 that fixes the operation lever 129 at the lock position.

When removing the holder 127 together with the holding rail 125 from the mounting seat 126a, first, the bolt with knob 131 is removed and the operating lever 129 is rotated upward from the locked position to the released position. As a result, the lock plate 130 slides forward, and the engagement between the locking pin 132 provided in the mounting seat 126a and the lock hole 130a provided in the lock plate 130 is released.

Therefore, when the holder 127 is pulled toward the front side, the tapered nut 133 provided on the mounting seat 126a and the holder 127 are disengaged from the locking pin 132, and the holder 127 can be removed upward. Further, when the holder 127 is attached to the attachment seat 126a together with the holding rail 125, it can be attached by the reverse procedure of the above.

The structure of the grain culm transport device mainly composed of the stock source transport device of the cutting unit 12 has been described above. Next, the work of removing the clogging of the grain culm in the grain culm transport device will be described. In this case, if the 6-row cutting combine 1 is used, one row of rows is raised and mowed for each raising device 15. However, if the space between adjacent fluffy culms is narrow, two rows of rows may be raised by one raising device 15 and cut, and in that case, the cutting section 12 may have 6 or more rows of grains. The culms are transported toward the threshing section 29, which may cause clogging of the culms, especially in the stock transfer devices 20, 21 and 22.

The clogging of the grain culms is caused by, for example, the right stock culm transport device in which 6 or more culms merge from the confluence portion G1 of the right stock culm transport device 20 and the middle stock culm transport device 22 in which the 4 culms merge. Since the culm amount is larger in the confluence G2 of the left stock transfer device 21 and the left stock transfer device 21, clogging is likely to occur first in the confluence G2, and the clogging sensor 91 provided in the confluence G2 detects this and the engine The engine 36 is stopped by the stop circuit of 36.

Further, in this case, since the tooth skipping mechanism of the left stock source transport chain 85 is in a tooth skipping allowable state, if an overload acts on the left stock source transfer chain 85 due to clogging of the grain culm, the left stock source transfer chain 85 is driven by a sprocket. It is in a state of being stopped because the rotational drive becomes impossible while preventing the chain 85 and the like from being damaged by skipping teeth from the 75. Therefore, the operator notices the clogging of the grain culm, disconnects the cutting clutch 50 and the threshing clutch 48, interrupts the cutting work, and descends from the control unit 10 to remove the clogged grain culm.

In that case, the operator first removes the holding rail 125 of the handling depth transfer device 23 together with the holder 127 by the operating lever 129. As a result, the holding force of the grain culm by the holding rail 125 and the handling depth transfer chain 123 disappears, and the outer side of the handling depth transfer chain 123 is opened, so that the locking claw and the handling depth of the tip transfer device 26 are opened. The grain culms remaining on the transport chain 123 can be easily removed.

Further, when the grain culm is removed from the handling depth transport chain 123 or the like, the end portions of the left and right stock transfer devices 20 and 21 and the start end portion of the handling depth transfer device 23 are exposed from the left side of the cutting section 12. The grain culms stuck at the ends of the left and right stock transfer devices 20 and 21 are removed from that side. In this case, if the culm cannot be easily removed by pulling it out from the stock transport chains 67, 85, etc. of the left and right stock transport devices 20 and 21, the fixing bolt 93 with a lever is first removed and the left stock is removed. The fixed state of the mounting frame 84 with respect to the original transport frame 82 is released.

Then, when the operation lever 98 of the regulator 94 constituting the opening mechanism of the left stock transfer device 21 is rotated backward, the regulator 94 is fixed because the restriction on the movement of the mounting frame 84 to the front side is released. The restrictions on the retreat of the rollers 80a and 80b from the aisle are lifted, and the left stock culm transport chain 85 and the fixed rollers 80a and 80b are pushed forward by the pressure of the clogged culm, and both the transport devices 20 and 21 The transport passage (transport passage width) of the merging portion G2 expands to the left stock transfer device 21 side, and the compressed state of the grain culm is released accordingly.

Therefore, the culm that has been released from the compressed state can be easily pulled out from the stock transfer chains 67 and 85, and the pulling out is attempted in this state. However, if most of the culms cannot be pulled out even if the culms can be pulled out to some extent in this state, the input shaft 51 of the cutting section 12 is used with a tool (manual drive mechanism) such as a socket wrench 52. The drive sprocket 75 of the left stock transfer device 21 is rotated in the reverse direction, and the left stock transfer chain 85 moves the grain culm clogged in the confluence G2 to the upstream side to compress the grain culm. Since the state is further released, it becomes easier to pull out the culm.

If the reverse rotation does not have any effect on the movement of the clogged culm to the upstream side, the input shaft 51 is rotated forward to move the clogged culm to the downstream side to discharge the clogged culm from the confluence G2. Try. Alternatively, the reverse rotation and the forward rotation are repeated to promote the further release of the compressed state of the clogged culm (unravel the culm) and pull out the clogged culm in the confluence G2 to remove it. In this case, since the tooth skipping mechanism of the left stock source transport chain 85 is in the tooth skipping prevention state, the left stock source transfer chain 85 does not fly from the drive sprocket 75. Can be pulled out more easily.

On the other hand, if not only the confluence G2 of the right stock transfer device 20 and the left stock transfer device 21 but also the confluence G1 of the right stock transfer device 20 and the middle stock transfer device 22 is clogged with grains. The movable guide rail 68 of the right stock transfer device 20 is operated by operating the operation lever 70 that can be operated by exposing the end portions of the left and right stock transfer devices 20 and 21 and the start end of the handling depth transfer device 23. Switch to the retracted position. As a result, the transport passage at the confluence G1 of the right stock transfer device 20 and the middle stock transfer device 22 is expanded, and the clogged grain culm is retracted by pushing the right stock transfer chain 67 of the confluence G1. It bends to the end side of the, and its compressed state is released.

At the same time, the drive sprocket 54 of the right stock transfer device 20 is rotated in the forward and reverse directions by using a manual drive mechanism, and the grain culm clogged in the confluence G1 is moved to the upstream side by the rotation drive of the right stock transfer chain 67. When the culm is moved to the downstream side and unraveled, the compressed state of the culm can be further released. Therefore, in this state, the clogged culm can be pulled out from the pulling device 15 side in front of the cutting section 12 and removed.

Then, when the clogged culm is removed from the merging portions G1 and G2, the operating lever 70 is operated to return the movable guide rail 68 to the original position where the transport passage is narrowed, and the regulating body of the opening mechanism. The 94 is returned to the regulated position by the operating lever 98, and the mounting frame 84 is fixed to the left stock transfer frame 82 by the fixing bolt 93 with the lever. Further, the holding rail 125 of the handling depth transfer device 23 is attached as before, and the interrupted cutting work is restarted.

Although the embodiment of the present invention has been described above, the fixed rollers and tension rollers provided on the left and right stock transfer devices 20 and 21 use sprockets, or a non-rotating steel plate that bends the portion around which the stock transfer chains 67 and 85 are wound. May be formed with. Further, if the star wheel 17 is driven by another drive system, the driven sprockets 55 and 79 may be configured by rollers or the like, and these are regarded as a rotating wheel body or a tension wheel body. Further, if the left stock transfer device 21 is to be merged with the grain transfer device 22 and the right stock transfer device 20, the opening mechanism and the tooth skipping mechanism are combined with the right stock transfer device. The structure of the left and right stock transfer devices 20 and 21 may be reversed by providing the device 20 and the present invention is not necessarily limited to the above embodiment.

1 Combine 20 Right stock transfer device 21 Left stock transfer device 22 Middle stock transfer device 52 Socket wrench (drive mechanism)
75 Drive sprocket 77 Tension roller (tension wheel)
79 Driven sprocket (rotary wheel)
80a Fixed roller (rotary wheel)
80b Fixed roller (rotary wheel)
80c fixed roller (rotary wheel)
82 Conveying frame 84 Mounting frame 85 Left stock original transport chain 94 Regulator 98 Operating lever 99 Tension coil spring (holding means)
104 Tooth skip prevention body 106 Back rest 107 Link G2 Confluence

Claims (4)

One of the transport passages at the confluence of the left and right stock transport devices, which includes a drive sprocket, a rotating wheel, a tension wheel, and a stock transport chain that wraps around them, and the left and right stock transport devices. Tooth skipping that allows or prevents disengagement at the meshing portion between the opening mechanism that expands by retracting the rotating wheel of the transport device, the drive mechanism that rotates the drive sprocket of the stock transfer device in the forward and reverse directions, and the drive sprocket of the stock transfer chain. A mechanism is provided, and in order to remove the clogged sprocket when the sprocket is clogged at the confluence of the left and right sprocket transport devices, the retreat of the rotating wheel body is regulated by the regulating body of the opening mechanism. When released, the tooth skipping mechanism is set to the tooth skipping prevention state in conjunction with this, while when the retreat of the rotating wheel body is restricted by the restricting body, the tooth skipping mechanism is set to the tooth skipping allowable state in conjunction with this. Characterized combine. The tooth skip prevention body facing the meshing portion with the drive sprocket of the stock transport chain is separated from the tooth skip prevention state facing the upper and lower link plates in close proximity to the chain roller of the stock transport chain. The tooth skipping mechanism is configured by movably providing a tooth skipping allowable state away from the upper and lower link plates, and a mounting frame for a rotating wheel body is movably mounted on the transport frame of the stock transfer device. The opening mechanism is provided so as to be switchable between a state in which the retreat of the rotating wheel body is restricted and a state in which the restriction is released by contact with a restricting body that is rotatably supported on a transport frame and rotated by an operation lever. The combine according to claim 1, wherein the restrictor of the opening mechanism and the tooth skipping prevention body are connected via a link to link the regulating body of the opening mechanism and the tooth skipping mechanism. A holding means for rotating the restricting body whose retreat restriction of the rotating wheel body is released by the operating lever to a predetermined release position is provided, and the tooth skipping prevention body is moved to an appropriate tooth skipping prevention state by this holding means. The combine according to claim 2. The tooth skipping prevention body is provided movably by being guided to the back support portion of the transport frame along the tangential direction at the meshing portion with the drive sprocket of the stock origin transport chain, and is added in the tooth skipping prevention state of the tooth skip prevention body. The combine according to claim 3, wherein the reaction force from the original transport chain side is received by the backrest portion of the transport frame.

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