JP6879280B2 - combine - Google Patents

Description

The present invention relates to a combine.

Conventionally, a cutting device for cutting grain culms in a field is connected to a grain removal device via a transport elevator that transports the harvested culms, and a rotary drum of the transport elevator around which a transport chain with a transport body is mounted is used as a transport elevator. A configuration in which the elevator case is provided so as to be movable in the transport direction of the transport elevator and to be vertically movable is known (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2012-210164

In the above-mentioned known example, since the tension mechanism for moving the rotating drum back and forth is provided in the elevator case, there is a problem that the culm is caught in the tension mechanism in the elevator case, causing clogging and loss.
In this application, the tension mechanism and the vertical mechanism are devised to prevent the occurrence of clogging and loss.

In the invention according to claim 1, the grain shavings cut by the cutting device 4 provided in front of the traveling device 2 are provided in the grain removing device 3 provided above the traveling device 2 and in the endless transport chain 22. In the combine provided with the transfer elevator 15 supplied and conveyed by 23, the transfer chain 22 is hung between the drive gear 19 on the base side of the transfer elevator 15 and the passive rotary drum 20 provided on the tip side of the transfer elevator 15. The passive rotating drum 20 is rotated and attached to a telescopic arm member 26 provided so as to be expandable and contractible in the transport direction of the transport elevator 15 and vertically rotatable, and the telescopic arm member 26 is a side plate 18 of the elevator case 17. The left and right ends of the drum shaft 25 of the passive rotating drum 20 are movable in the transport direction of the transport elevator 15. The base side of the outer arm portion 33 of each telescopic arm member 26 is attached to the tip side of the inner arm portion 32 of the telescopic arm member 26, and rotates around the rotation fulcrum shaft 27 provided on the side plate 18 of the elevator case 17. It is a freely attached combine.
In the invention according to claim 2, the telescopic arm member 26 is located inside the side plate 18 of the elevator case 17, and the tip of the inner arm portion 32 is attached to the bearing portion 31 of the drum shaft 25 of the passive rotating drum 20. At the rear, the front portion of the outer arm portion 33, which is located outside the side plate 18 and whose base portion is rotatably attached to the rotation fulcrum shaft 27, is sandwiched between the side plates 18 so as to sandwich the front portions of the outer arm portions 33. It is a fixed combine.
In the invention according to claim 3, the outer arm portion 33 is front-rear to a rear member 35 having a boss portion 34 attached to the rotation fulcrum shaft 27 and a front member 36 attached to the inner arm portion 32 side. The front member 36 is movable with respect to the rear member 35, and the outer arm portion 33 is provided with a tension mechanism 30 for adjusting the tension of the transport chain 22.
In the invention according to claim 4, the outer arm portion 33 and the inner arm portion 32 are combined bodies fixed by a fastening member 41 inserted into a moving groove 42 formed in a side plate 18 of an elevator case 17. ..
In the invention according to claim 5, a combine is provided between the telescopic arm member 26 and the elevator case 17 with a spring 45 for urging the passive rotating drum 20 to constantly move downward.
In the invention according to claim 6, the spring 45 is provided by inserting the tip end side into the outer circumference of the rod 46 attached to the outer arm portion 33, and the base portion of the rod 46 is a combine movably attached to the transport elevator 15 side. It was done.

In the invention of claim 1, since the passive rotating drum 20 is attached to the telescopic arm member 26 provided on the outside of the elevator case 17, which is expandable and vertically rotatable, it is possible to prevent clogging and loss. In addition, the tension state of the transport chain 22 can be optimized, and the tension force of the transport chain 22 can be adjusted by expanding and contracting the outer arm portion 33 of the telescopic arm member 26. When a large amount of transported material flows into the receiving port 24, the tip of the telescopic arm member 26 rotates upward around the rotation fulcrum shaft 27 and retracts, so that clogging at the receiving port 24 can be prevented.
In the invention of claim 2, the telescopic arm member 26 is sandwiched between the inner arm portion 32 inside the elevator case 17 and the outer arm portion 33 outside the elevator case 17 with the side plate 18 interposed therebetween. The telescopic arm member 26 can rotate the inner arm portion 32 and the outer arm portion 33 up and down around the rotation fulcrum shaft 27, and can prevent the occurrence of clogging at the receiving port 24.
In the invention of claim 3, the outer arm portion 33 is divided into a rear member 35 having a boss portion 34 attached to the rotation fulcrum shaft 27 and a front side member 36 attached to the inner arm portion 32 side. Since the front member 36 is movable with respect to the member 35, the tension mechanism 30 can be easily provided on the outside of the transport elevator 15, the transport passage in the elevator case 17 can be widened, and the tension mechanism 30 can be widened. It is possible to prevent the transported object from being caught in the members such as.
In the invention of claim 4, the outer arm portion 33 and the inner arm portion 32 of the telescopic arm member 26 are fixed by the fastening member 41 inserted into the moving groove 42 formed in the side plate 18 of the elevator case 17. The outer arm portion 33 and the inner arm portion 32 can be connected via the fastening member 41, and the fastening member 41 moves up and down in the moving groove 42 so as not to interfere with the vertical rotation of the telescopic arm member 26.
In the invention of claim 5, since the spring 45 for urging the passive rotating drum 20 to constantly move downward is provided between the telescopic arm member 26 and the elevator case 17, the passive rotating drum 20 is configured. The distance between the transport body 23 and the bottom plate of the elevator case 17 can be appropriately maintained while preventing the occurrence of clogging.
In the invention of claim 6, since the spring 45 is inserted through the outer circumference of the rod 46, the action direction of the spring 45 can be guided by the rod 46 so as to be always appropriate, and the telescopic arm member 26 is rotated downward. Can be reliably urged.

Side view of the combine. Top view of a part of the reaping device and the vicinity of the transport elevator. The same side view. Top view of the vicinity of the telescopic arm member. Top view with the same part omitted. The front view and the side view. Cross-sectional view and schematic view of the same part. A plan view showing a transmission mechanism of a transport elevator, a partially enlarged view thereof, and a cross-sectional view of the transport body.

Explaining one embodiment of the present invention with reference to the drawings, 1 is a traveling device provided at a position below the machine frame 1, 2 is a traveling device provided at a position below the machine frame 1, and 3 is a threshing device provided at a position above the machine frame 1. 4 is a cutting device provided in front of the machine frame 1, 5 is a grain tank for temporarily storing grains taken out from the threshing device 3 provided on the side of the threshing device 3, and 6 is a control unit. (Fig. 1).
The reaping device 4 has a weeding device 10 provided in front, a scraping reel 11 for scraping the culm, a cutting blade 12 for reaping the scraped culm, and an auger 13 for collecting the culm. It is attached to 14 and configured. The cutting device 4 attaches the tip of the transfer elevator (transport device) 15 to the table 14, and the base of the transfer elevator 15 is connected to the threshing chamber (not shown) of the threshing device 3 (FIG. 1).

The elevator drive shaft 16 at the base of the transport elevator 15 is configured to input the rotation of the engine (not shown), and the elevator drive shaft 16 is also configured to be used as the cutting input shaft for transmitting the rotation to the cutting device 4 ((not shown). Figure 2).
Further, the transport elevator 15 and the cutting device 4 rotate up and down with the elevator drive shaft 16 as a rotation fulcrum.
The elevator drive shaft 16 is rotatably mounted on the left and right side plates 18 of the elevator case 17 of the transport elevator 15, and a pair of left and right drive gears 19 are fixed to the elevator drive shaft 16. An endless transfer chain 22 is hung around the drive gear 19 between the pair of left and right tooth portions 21 of the passive rotating drum 20. The transport chain 22 is provided with a plurality of transport bodies 23 at predetermined intervals.

The passive rotating drum 20 is configured to be movable in the transport direction (front-back direction) of the transport elevator 15 and to be vertically movable in order to adjust the tension force of the transport chain 22.
Therefore, even if a large amount of transported material flows into the receiving port 24 (FIG. 2) between the table 14 and the transport elevator 15, the passive rotating drum 20 moves upward to prevent clogging at the receiving port 24. , The tension state of the transport chain 22 can be optimized.
The tip sides of the telescopic arm members 26 that can move in the transport direction (front-back direction) of the transport elevator 15 are attached to the left and right ends of the drum shaft 25 of the passive rotating drum 20, respectively, and the base side of each telescopic arm member 26 is It is rotatably attached to a rotation fulcrum shaft 27 provided on a side plate 18 of an elevator case 17 located behind the axis of the passive rotation drum 20 (FIG. 3).

Therefore, a tension mechanism 30 that allows the tension of the transport chain 22 to be adjusted can be provided in a part of the telescopic arm member 26, and at the same time, when a large amount of transported material flows into the receiving port 24, the telescopic arm member 26 The tip (passive rotating drum 20) rotates upward around the rotation fulcrum shaft 27 and retracts to prevent clogging at the receiving port 24.
The telescopic arm member 26 is located inside the side plate 18 of the elevator case 17, and is located outside the side plate 18 at the rear of the inner arm portion 32 whose tip is attached to the bearing portion 31 of the drum shaft 25 of the passive rotating drum 20. The front portion of the outer arm portion 33, which is located at the position of the rotation fulcrum shaft 27 and whose base portion is rotatably attached to the rotation fulcrum shaft 27, is fixed to each other so as to sandwich the side plate 18 (FIGS. 2 and 7). ).

Therefore, in the telescopic arm member 26, the inner arm portion 32 and the outer arm portion 33 rotate up and down around the rotation fulcrum shaft 27.
The outer arm portion 33 is divided into a rear member 35 having a boss portion 34 attached to the rotation fulcrum shaft 27 and a front member 36 attached to the inner arm portion 32 side, and the rear member 35 is divided into front and rear members. The front member 36 is movable, and the outer arm portion 33 is provided with a tension mechanism 30 for adjusting the tension of the transport chain 22 (FIGS. 2 and 7).
Therefore, since the tension mechanism 30 is provided on the outer arm portion 33 exposed to the outer surface side of the side plate 18 of the elevator case 17, it is possible to avoid providing the tension mechanism 30 of the transfer chain 22 of the transfer elevator 15 in the elevator case 17. The transport passage in the elevator case 17 can be widened, and the transport object can be prevented from being caught in a member such as the tension mechanism 30.

The configuration of the tension mechanism 30 is arbitrary, but for example, a rear member 35 fixed to the boss portion 34 is formed in a screw cylinder, and the front member 36 formed by a screw shaft is movable back and forth with respect to the rear member 35. It is constructed by screwing it into. Reference numeral 38 denotes a double nut screwed into the front member 36, which acts to fix the expansion and contraction of the front member 36 with respect to the rear member 35.
The telescopic arm member 26 is located inside the side plate 18 of the elevator case 17, and has the inner arm portion 32 having the tip attached to the bearing portion 31 of the drum shaft 25 of the passive rotating drum 20 and the side plate 18 of the elevator case 17. The side plate 18 is sandwiched and sandwiched by the outer arm portion 33 located on the outer side, and both are fixed to each other (FIG. 4).
Therefore, in the telescopic arm member 26, the outer arm portion 33 and the inner arm portion 32 rotate integrally with the center of the rotation fulcrum shaft 27 up and down.

The fixed configuration of the outer arm portion 33 and the inner arm portion 32 is arbitrary. For example, a plate-shaped mounting member 40 is fixed to the front end portion of the front side member 36 of the outer arm portion 33, and the mounting member 40 and the inner arm portion are fixed. 32 is fixed by a fastening member 41 such as a bolt (FIGS. 3 and 7). The fastening member 41 connects the outer arm portion 33 (mounting member 40) and the inner arm portion 32 via a moving groove 42 formed in the side plate 18 of the elevator case 17, and the fastening member 41 moves up and down in the moving groove 42. Then, the telescopic arm member 26 is configured to rotate up and down around the rotation fulcrum shaft 27.
In this case, at least the inner arm portion 32 is configured to have an area that does not open the moving groove 42 even if the fastening member 41 rotates up and down, and prevents the conveyed object and dust from leaking from the moving groove 42.
A plurality of moving grooves 42 and fastening members 41 are arranged side by side in the length direction of the outer arm portion 33.

Therefore, the connection between the outer arm portion 33 and the inner arm portion 32 is strengthened, and the passive rotating drum 20 can be reliably supported.
A spring 45 for urging the passive rotating drum 20 to constantly move downward is provided between the telescopic arm member 26 and the elevator case 17 (FIG. 3).
The spring 45 is formed by a coil spring and is inserted into the outer circumference of the rod 46. The lower end of the rod 46 is rotatably attached to the attachment member 40 of the outer arm portion 33 by a pin 49A, and the upper portion of the rod 46 is inserted vertically into a guide body 48 provided on the outer surface of the side plate 18 of the elevator case 17. The stopper pin 49 is attached to a predetermined portion of the rod 46 that protrudes upward from the guide body 48.
Therefore, a spring 45 formed of a compression coil spring is inserted and attached to the outer circumference of the rod 46 between the guide body 48 and the outer arm portion 33.

The downward movement of the rod 46 is regulated by the stopper pin 49, the elasticity of the spring 45 acts to urge the passive rotating drum 20 to be always positioned downward, and a load larger than the elasticity of the spring 45 is applied to the passive rotating drum 20. The passive rotating drum 20 pushes up the rod 46 against the elasticity of the spring 45, rotates the telescopic arm member 26 upward around the rotation fulcrum shaft 27, and passively rotates the drum 20 from the bottom surface of the elevator case 17. 20 is retracted upward to prevent clogging.
Therefore, the spring 45 and the rod 46, which are the urging means of the passive rotating drum 20, can also be installed outside the side plate 18 of the elevator case 17, and the transport passage in the elevator case 17 can be widened and the passive rotation can be performed. It is possible to prevent the spring 45 and the rod 46, which are the urging means of the drum 20, from becoming the transport resistance of the transported object in the elevator case 17.

In this case, when the tension force of the telescopic arm member 26 (outer arm portion 33) and the transport chain 22 by the passive rotating drum 20 is in the normal state, the rod 46 is substantially orthogonal to the outer arm portion 33. And the guide body 48 and the outer arm portion 33 are arranged, and as shown in FIG. 6, when the rod 46 is tilted backward (the pin 19A is in the front position), the length of the outer arm portion 33 becomes longer and the transport chain 22 becomes longer. When the tension force of the rod 46 becomes stronger and the rod 46 tilts backward (the pin 19A is in the rear position), the length of the outer arm portion 33 becomes shorter and the tension of the transport chain 22 becomes weaker (FIG. 6). ..
Therefore, the inclination angle of the rod 46 with respect to the outer arm portion 33 can be maintained at approximately 90 degrees, the influence of the tension of the outer arm portion 33 is minimized, and the passive rotating drum 20 is moved downward by the rod 46. It is forced to stabilize the vertical movement of the passive rotating drum 20.

Further, the rod 46 is substantially orthogonal to the outer arm portion 33, and the attachment portion between the rod 46 and the attachment member 40 of the telescopic arm member 26 is located behind the drum shaft 25 of the passive rotating drum 20. (Fig. 3).
Therefore, the rod 46 and the like can be stored in the cover 50 surrounding the transmission mechanism (chain 59 and the like) D to the cutting device 4 described later (FIG. 4), and the grain culm and the like are careless with the tension mechanism 30. It can prevent contact and is protected from rainwater and dust.
A position detection unit (position detection sensor) 51 for detecting the position of the telescopic arm member 26 is provided between the telescopic arm member 26 and the side plate 18 of the elevator case 17 (FIG. 3), and the telescopic arm member 26 rotates. When the vehicle rotates upward by a predetermined value or more about the center of the fulcrum shaft 27, the operator of the control unit 6 is notified by sound and / or display, or the engine is stopped.
The position detection unit 51 of the present embodiment is formed by a non-contact type sensing sensor and is provided inside the telescopic arm member 26, but a contact type limit switch may be provided.

Therefore, the supply of excess large amount of culm from the cutting device 4 to the transport elevator 15 is suppressed, and damage and loss of the transport elevator 15 are prevented.
The passive rotating drum 20 is configured by fixing a pair of left and right side plates 54 to a drum shaft 25, respectively, and providing a chain engaging rod (tooth portion 21) 55 with which a transport chain 22 engages on the outer periphery of the side plates 54.
Therefore, when a large amount of grain is supplied to the receiving port 24 of the transport elevator 15, the contact resistance between the chain engagement rod 55 of the passive rotating drum 20 and the grain is reduced, and the passive rotating drum 20 is damaged and loss occurs. To prevent.
As shown in FIG. 5, if each chain engaging culm 55 is formed in the shape of a collar (shaft cylinder and side plate 54) and is also used as the tooth portion 21, the chain engaging culm (tooth portion 21) 55 of the passive rotating drum 20 is formed. The contact resistance between the tooth and the culm is further reduced, and the culm is prevented from wrapping around the chain engaging rod 55 to prevent damage and loss of the passive rotating drum 20.

The transmission mechanism D to the cutting device 4 includes a cutting output gear 56 provided on the left side of the elevator drive shaft 16, an intermediate gear 58 of the intermediate shaft 57, a transmission chain 59, and another intermediate gear 60 of the intermediate shaft 57. A chain 63 is provided between the intermediate gear 60 and the gear 62 of the auger shaft 61 of the auger 13, and the intermediate gear 58 of the intermediate shaft 57 and the intermediate gear 60 are rotating bodies 64 provided on the intermediate shaft 57. It is attached by a so-called shear bolt 65 that is sheared when a load exceeding a predetermined value is applied to the gear, and damage to the transmission chain 59 and the chain 63 is prevented.
Therefore, it is possible to prevent the chain from being damaged when a large amount of culm is supplied from the cutting device 4 to the transport elevator 15, improve the work efficiency, and speed up the return.

Further, among the transmission mechanism D, the cutting output gear 56, the intermediate gear 58 of the intermediate shaft 57, and the transmission chain 59 are surrounded by the cover 50, and each part of the transmission mechanism D is located at a predetermined position of the cover 50. A lubrication port (not shown) is provided.
Therefore, each part of the transmission mechanism D can be lubricated without removing the cover 50, which facilitates maintenance.
If this lubrication port is opened on the side surface of the cover 50, the invasion of straw debris and the like can be suppressed, which is preferable.
An elastic body 65A is attached to the transport body 23 of the transport chain 22, and the lower end of the elastic body 65A is configured to slide on the bottom plate 66 of the elevator case 17 (FIG. 8).
Therefore, it is possible to prevent the transported object from staying in the elevator case 17, and by preventing the transported object from staying, it is possible to prevent the occurrence of loss and further prevent the occurrence of clogging in the elevator case 17.

Further, by providing the elastic body 65A on the transport body 23, the gap of the transport body 23 can be easily adjusted, and the tension of the transport chain 22 can be easily adjusted.
The transport body 23 is formed in a U-shaped cross section, and an elastic body 65A is attached to a front portion (inner portion of the U-shape) in the traveling direction of the transport body 23 by bolts 67.
Therefore, since the elastic body 65A is attached to the front side portion in the traveling direction of the transport body 23, the attachment strength of the elastic body 65A can be improved as compared with the case where the elastic body 65A is attached to the rear portion in the traveling direction, and the elastic body 65A is attached by the bolt 67. Therefore, it is easy to install and replace.

(Action of Embodiment)
In the present invention, the machine body is driven by the traveling device 2, the culms in the field are scraped by the rotating scraping reel 11 of the cutting device 4, and the scraped culms are cut and cut by the cutting blade 12. The grain culm is supplied to the threshing device 3 by the transport elevator 15 and transported to thresh.
In the transfer elevator 15, the engine rotation is input to the elevator drive shaft 16, and the elevator drive shaft 16 rotates the passive rotating drum 20 via the drive gear 19 and the transfer chain 22, and the transfer body 23 provided in the endless transfer chain 22. The gears cut by the elevator are supplied and transported to the threshing chamber (not shown) of the threshing device 3.

Since the passive rotating drum 20 is movable in the transport direction (front-back direction) of the transport elevator 15 and is configured to be vertically movable in order to adjust the tension of the transport chain 22, a large amount of the passive rotary drum 20 is configured at the receiving port 24 of the transport elevator 15. The passive rotating drum 20 moves upward to prevent clogging at the receiving port 24, and the tension state of the transport chain 22 can be optimized.

The tip sides of the telescopic arm members 26 that can move in the transport direction (front-back direction) of the transport elevator 15 are attached to the left and right ends of the drum shaft 25 of the passive rotating drum 20, respectively, and the base side of each telescopic arm member 26 is Since they are rotatably attached to the rotation fulcrum shafts 27 provided on the side plates 18 of the elevator case 17 located behind the axis of the passive rotation drum 20, the transport chain 22 is attached to a part of the telescopic arm member 26. A tension mechanism 30 that can adjust the tension force of the above can be provided, and at the same time, when a large amount of conveyed material flows into the receiving port 24, the tip (passive rotating drum 20) of the telescopic arm member 26 moves to the rotating fulcrum shaft 27. It rotates upward to the center and retracts to prevent clogging at the receiving port 24.

The telescopic arm member 26 is located inside the side plate 18 of the elevator case 17, and is located at the rear of the inner arm portion 32 having the tip attached to the bearing portion 31 of the drum shaft 25 of the passive rotating drum 20, and outside the side plate 18. Since the front portion of the outer arm portion 33, which is positioned and whose base portion is rotatably attached to the rotation fulcrum shaft 27, is fixed to each other so as to sandwich the side plate 18, the telescopic arm In the member 26, the inner arm portion 32 and the outer arm portion 33 rotate up and down around the rotation fulcrum shaft 27.

The outer arm portion 33 is divided into a rear member 35 having a boss portion 34 attached to the rotation fulcrum shaft 27 and a front side member 36 attached to the inner arm portion 32 side, and is divided into front and rear members with respect to the rear member 35. Since the front member 36 is movable and the outer arm portion 33 is provided with a tension mechanism 30 for adjusting the tension of the transport chain 22, the outer arm portion exposed to the outer surface side of the side plate 18 of the elevator case 17 The tension mechanism 30 can be provided on the 33, the transport passage in the elevator case 17 can be widened, and the transported object can be prevented from being caught by a member such as the tension mechanism 30.

The tension mechanism 30 is configured by forming a rear member 35 fixed to the boss portion 34 in a screw cylinder, and screwing the front member 36 formed by the screw shaft to the rear member 35 so as to be movable back and forth. Therefore, when the front member 36 is rotated, the entire length of the outer arm portion 33 can be expanded and contracted, and the tension of the transport chain 22 can be adjusted.
Further, since the double nut 38 is screwed into the front member 36, the double nut 38 acts to fix the expansion and contraction of the front member 36 with respect to the rear member 35.

The telescopic arm member 26 is located inside the side plate 18 of the elevator case 17, and the side plate is formed by the inner arm portion 32 having the tip attached to the bearing portion 31 of the drum shaft 25 of the passive rotating drum 20 and the outer arm portion 33. Since 18 is sandwiched between the two and fixed to each other, the outer arm portion 33 and the inner arm portion 32 of the telescopic arm member 26 rotate up and down around the rotation fulcrum shaft 27.

The outer arm portion 33 and the inner arm portion 32 fix a plate-shaped mounting member 40 to the front end portion of the front side member 36 of the outer arm portion 33, and fasten the mounting member 40 and the inner arm portion 32 to a fastening member such as a bolt. The fastening member 41 is fixed by 41, and the fastening member 41 connects the outer arm portion 33 (mounting member 40) and the inner arm portion 32 via a moving groove 42 formed in the side plate 18 of the elevator case 17, so that the arm can be expanded and contracted. When the member 26 is rotated up and down around the rotation fulcrum shaft 27, the fastening member 41 moves up and down in the moving groove 42 to prevent interference with the rotation of the telescopic arm member 26.

In this case, at least the inner arm portion 32 has an area that does not open the moving groove 42 even if the fastening member 41 rotates up and down, so that the conveyed objects and dust in the elevator case 17 move in the moving groove 42. Prevent leaks from.
Since a plurality of moving grooves 42 and fastening members 41 are arranged side by side in the length direction of the outer arm portion 33, the connection between the outer arm portion 33 and the inner arm portion 32 is strengthened, and the passive rotating drum 20 is ensured. Can be supported by.

A spring 45 for urging the passive rotating drum 20 to constantly move downward is provided between the telescopic arm member 26 and the elevator case 17, and the spring 45 is attached to the mounting member 40 of the outer arm portion 33 and the lower end of the rod 46. The upper part of the rod 46 is rotatably inserted into the guide body 48 provided on the outer surface of the side plate 18 of the elevator case 17, and the stopper pin 49 is attached to the rod 46 protruding upward from the guide body 48. Since a spring 45 formed of a compression coil spring is inserted and attached to the outer periphery of the rod 46 between the guide body 48 and the outer arm portion 33, the lower movement of the rod 46 is regulated by the stopper pin 49, and the elasticity of the spring 45 is restricted. Bounces the passive rotating drum 20 so that it is always positioned downward, and when a load larger than the elasticity of the spring 45 is applied to the passive rotating drum 20, the passive rotating drum 20 pushes up the rod 46 against the elasticity of the spring 45. The telescopic arm member 26 is rotated upward around the rotation fulcrum shaft 27, and the passive rotating drum 20 is retracted upward from the bottom surface of the elevator case 17 to prevent clogging.

Therefore, the spring 45 and the rod 46, which are the urging means of the passive rotating drum 20, can also be installed outside the side plate 18 of the elevator case 17, and the transport passage in the elevator case 17 can be widened and the passive rotation can be performed. It is possible to prevent the spring 45 and the rod 46, which are the urging means of the drum 20, from becoming the transport resistance of the transported object in the elevator case 17.

In this case, when the tension force of the telescopic arm member 26 (outer arm portion 33) and the transport chain 22 by the passive rotating drum 20 is in a normal state, the rod 46 is substantially orthogonal to the outer arm portion 33. And the guide body 48 and the outer arm portion 33 are arranged, and as shown in FIG. 6, when the rod 46 is tilted backward, the length of the outer arm portion 33 becomes longer and the tension force of the transport chain 22 becomes stronger. When the rod 46 is tilted backward, the length of the outer arm portion 33 is shortened to weaken the tension of the transport chain 22, so that the tilt angle of the rod 46 with respect to the outer arm portion 33 is approximately 90 degrees. The influence of the tension of the outer arm portion 33 can be minimized, and the passive rotating drum 20 can be constantly downwardly urged by the rod 46 to stabilize the vertical movement of the passive rotating drum 20. ..

Further, the rod 46 is substantially orthogonal to the outer arm portion 33, and the attachment portion between the rod 46 and the attachment member 40 of the telescopic arm member 26 is located behind the drum shaft drum shaft 25 of the passive rotating drum 20. Since the rod 46 and the like can be stored in the cover cover 50 surrounding the transmission mechanism D to the cutting device 4, it is possible to prevent inadvertent contact with the tension mechanism and to prevent rainwater and rainwater. Protected from dust.

1 ... Aircraft frame, 2 ... Traveling device, 3 ... Grain removal device, 4 ... Cutting device, 5 ... Glen tank, 6 ... Control unit, 10 ... Weeding device, 11 ... Scraping reel, 12 ... Cutting blade, 13 ... Auger, 14 ... Table, 15 ... Transport elevator, 16 ... Elevator drive shaft, 17 ... Elevator case, 18 ... Side plate, 19 ... Drive gear, 20 ... Passive rotating drum, 21 ... Tooth (chain engagement rod), 22 ... Conveyor chain, 23 ... Conveyor, 24 ... Receiving port, 25 ... Drum shaft, 26 ... Telescopic arm member, 27 ... Rotating fulcrum shaft, 30 ... Tension mechanism, 31 ... Bearing part, 32 ... Inner arm part, 33 ... outer arm part, 34 ... boss part, 35 ... rear side member, 36 ... front side member, 38 ... double nut, 40 ... mounting member, 41 ... fastening member, 42 ... moving groove, 45 ... spring, 46 ... rod, 48 ... Guide body, 49 ... Stopper pin, 49A ... Pin, 50 ... Cover, 51 ... Position detection part, 54 ... Side plate, 55 ... Chain engaging rod (tooth part), 56 ... Cutting output gear, 57 ... Intermediate shaft , 58 ... Intermediate gear, 59 ... Transmission chain, 60 ... Intermediate gear, 61 ... Auger shaft, 63 ... Chain, 64 ... Rotating body, 65 ... Shear bolt, 65A ... Elastic body, 66 ... Bottom plate, 67 ... Bolt.

Claims (6)

The gears cut by the cutting device (4) provided in front of the traveling device (2) were provided in the grain removal device (3) provided above the traveling device (2) in the endless transport chain (22). In a combine provided with a transport elevator (15) that is supplied and transported by a transport body (23), the transport chain (22) is a drive gear (19) on the base side of the transport elevator (15) and a transport elevator (15). The passive rotary drum (20) is hung between the passive rotary drum (20) provided on the tip side, and the passive rotary drum (20) is telescopic and vertically rotatable in the transport direction of the transport elevator (15). The telescopic arm member (26) attached to the combined arm member (26) is located inside the side plate (18) of the elevator case (17) and outside the side plate (18). The left and right ends of the drum shaft (25) of the passive rotating drum (20) are inside the telescopic arm member (26) which is configured by the outer arm portion (33) and is movable in the transport direction of the transport elevator (15). The rotation fulcrum shaft (27) provided on the side plate (18) of the elevator case (17) is attached to the tip side of the arm portion (32), and the base side of the outer arm portion (33) of each telescopic arm member (26) is provided. ) Is rotatably attached to the combine. In the invention according to claim 1, the telescopic arm member (26) is located inside the side plate (18) of the elevator case (17) and is a bearing portion (25) of the drum shaft (25) of the passive rotating drum (20). An outer arm portion (32) whose base is rotatably attached to the rotation fulcrum shaft (27) located outside the side plate (18) at the rear portion of the inner arm portion (32) to which the tip is attached to the tip (31). A combine in which the front portion of 33) is fixed to each other so as to sandwich the side plate (18). In the invention according to claim 2, the outer arm portion (33) includes a rear member (35) having a boss portion (34) attached to the rotation fulcrum shaft (27) and the inner arm portion (32). The front member (36) is divided into front and rear members (36) attached to the side, and the front member (36) is movable with respect to the rear member (35). A combine with a tension mechanism (30) that adjusts the tension of the combine. In the invention according to claim 3, the outer arm portion (33) and the inner arm portion (32) are a fastening member inserted into a moving groove (42) formed in a side plate (18) of an elevator case (17). Combine fixed by (41). In the invention according to claim 4, a spring (45) for urging the passive rotating drum (20) to constantly move downward is provided between the telescopic arm member (26) and the elevator case (17). Combine. In the invention according to claim 5, the spring (45) is provided by inserting the tip end side into the outer circumference of a rod (46) attached to an outer arm portion (33), and the base of the rod (46) is a transport elevator (15). ) A combine that can be moved to the side.

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