JP7217679B2 - Grain culm conveying device - Google Patents

Description

The present invention relates to a grain culm conveying device.

A plurality of locking claws attached to the endless chain at intervals conveys grain culms by cyclically moving between an action side route that engages grain culms and a non-action side route that does not act on grain culms. Grain culm conveying devices are known. In the field of such grain culm conveying devices, various techniques have been proposed for improving maintainability.

In Patent Document 1 below, a one-way clutch is interposed between the drive shaft and the endless chain provided with locking claws that are wound around the drive sprocket, and when straw clogging occurs during the transportation of the grain culms, A technology is described in which the straw clogging is eliminated by driving the conveying device in reverse, and the maintainability is improved.

Patent document 2 below discloses a technique in which an endless chain is provided so that it can be switched between forward and reverse rotation, and when the grain culm is clogged, the locking claw is moved in the opposite direction to the transportation of the grain culm to remove the clogged culm. Are listed.

Patent No. 5851760 Patent No. 3513456

In Patent Literature 1, since the locking claw cannot be moved in the direction opposite to the direction in which the culms are transported, it becomes difficult to remove the clogged culms when transport clogging occurs. Moreover, when incorporating a plurality of grain culm conveying devices like a combine harvester, it is necessary to attach a one-way clutch to each grain culm conveying device, which raises the problem of high cost.

In Patent Document 2, the engaging pawl is moved in a standing posture protruding outward from the endless chain in the working path by contact between a rising cam provided on the engaging pawl and a guide provided in the working path, The abutment between the rising cam and the guide is released at the end of the working side path, and the locking pawl is moved in a fallen posture along the moving direction of the endless chain on the non-working side path.

In Patent Document 2 as described above, in both forward and reverse rotation of the endless chain, the erecting cam is arranged to move the locking pawl so that the locking pawl is in an upright posture on the working side path and in a fallen posture on the non-working side path. It is provided before and after the moving direction. In the case of such a grain culm conveying device of Patent Document 2, when shifting from the non-working side path to the working side path, the erecting cam and the guide do not reliably come into contact, and the locking claw may be broken. . In addition, when the robot is rotated from the standing posture to the lying posture or from the lying posture to the standing posture, a large impact noise is likely to be generated.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a grain culm conveying apparatus capable of moving a locking claw in a direction opposite to the direction in which the culm is conveyed while suppressing breakage of the locking claw and generation of impact noise. .

A grain culm conveying device according to the present invention comprises an annular endless chain wound around a driving sprocket, and a plurality of locking claws attached to the endless chain at intervals, wherein the locking claws The endless chain circulates between a working path in which the endless chain protrudes outward while engaging with the grain culms and a non-working path in which the endless chain protrudes inward. .

Further, a grain culm conveying device according to another aspect of the present invention is such that in the grain culm conveying device, the endless chain sandwiches the locking claw from a direction perpendicular to the moving direction of the locking claw. They are provided on both sides of the locking pawl.

In the grain culm conveying device according to another aspect of the present invention, a pair of sprockets for guiding the movement of the endless chain provided on both sides of the locking pawl in the non-action side path A support shaft for supporting one of the pair of sprockets and a support shaft for supporting the other are separated to form a gap through which the locking claw passes.

In the grain culm conveying device according to another aspect of the present invention, in the grain culm conveying device, the locking claw includes a rod-shaped main body portion to which the grain culm is locked, and the engaging claw extending from one end of the main body portion. a connecting portion projecting in a direction perpendicular to the moving direction of the locking pawl and connected to the endless chain; a sliding portion projecting from the connecting portion in the moving direction of the locking pawl; A guide portion projecting in a direction opposite to the direction in which the body portion extends is provided.

Further, a grain culm conveying device according to another aspect of the present invention is the grain culm conveying device, and a driven sprocket that applies tension to the endless chain in a reversal route connecting the non-working side route and the working side route. a regulating portion for regulating the attitude of the engaging pawl moving on the reversing path; and an urging portion for urging the regulating portion so as to press the engaging pawl toward the driven sprocket. is.

In the present invention, the cams and guides are provided for setting the upright locking pawl projecting outward of the endless chain to the laid down position along the moving direction of the endless chain, and for setting the laid down locking pawl to the upright position. It becomes unnecessary, and it is possible to reliably circulate the locking claw in both the conveying direction and the reverse direction with a simple structure without breaking the locking claw.

BRIEF DESCRIPTION OF THE DRAWINGS The side view of the combine provided with the culm conveying apparatus which concerns on one Embodiment of this invention. 2 is a side view of the reaping portion of the combine of FIG. 1; FIG. BRIEF DESCRIPTION OF THE DRAWINGS The top view of the culm conveying apparatus which concerns on one Embodiment of this invention. FIG. 4 is a cross-sectional view along the line AA of FIG. 3; BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the culm conveying apparatus based on one Embodiment of this invention which removed the upper cover body.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of a combine 1 equipped with a grain culm conveying device according to this embodiment. In the following description, "front" and "rear" refer to the forward and backward directions of the combine 1, and "left" and "right" refer to the forward direction of the combine 1. means left and right.

A combine harvester 1 has a body 3 disposed on a pair of left and right crawler-type traveling parts 2, 2, and a reaping part 4 attached to the left front end of the body 3 so as to be vertically movable. A threshing section 5 is arranged on the left side of the body 3, a sorting section 6 is arranged below it, and a waste straw processing section 7 is arranged behind them. An operation section 8 is arranged on the right side of the machine body 3, and a grain storage section 9 is arranged behind it. In the threshing section 5, a threshing cylinder 10 with its axis oriented in the front-rear direction is rotatably arranged around its axis. are arranged. The root side of the harvested grain culm is clamped by the clamping body 11 and the feed chain 12, and the tip side of the harvested grain culm is transferred backward along the lower peripheral surface of the slapping cylinder 10, so that the tip side is The grain is threshed by a rotating threshing cylinder 10. - 特許庁Reference numeral 13 denotes an engine as a prime mover section which is arranged below the operation section 8 and drives each section.

The combine 1 as described above is operated by an operator in the operation section 8 to reap the culms planted in the field by the reaping section 4 while the machine body 3 is self-propelled by the traveling sections 2 and 2 . Then, the harvested culms are conveyed to the threshing section 5 and threshed in the threshing section 5 . The grains threshed in the threshing section 5 are sorted by swinging and wind sorting in the sorting section 6 . The grains sorted by the sorting unit 6 are conveyed to the grain storage unit 9 . In addition, the straw that is the culm after threshing is conveyed to the straw processing unit 7 and shredded.

As shown in FIGS. 1 and 2, the reaping unit 4 has a first transmission cylinder 21 extending straight in the left-right direction at the upper end of a support 20 erected on the left front end of the machine body 3. It is mounted rotatably around. A second transmission cylinder 22 extends straight forward and downward from an intermediate portion of the first transmission cylinder 21 . A third transmission cylinder 23 extending straight to the left and right sides is connected to the tip of the second transmission cylinder 22 . The first transmission cylinder 21 , the second transmission cylinder 22 , and the third transmission cylinder 23 form a main frame of the reaping part 4 . Transmission shafts are arranged in the first transmission cylinder 21, the second transmission cylinder 22, and the third transmission cylinder 23 to function as a transmission mechanism.

Rear ends of a pair of left and right front/rear extension auxiliary frames 24 that extend in the front/rear direction are attached to the third transmission cylinder 23 . In addition, a pair of left and right rising auxiliary frames 26 are erected forward and upward on the third transmission cylinder 23 . A culm raising body 27 for raising culms is mounted in a backward tilting position. Between the middle portions of the pair of left and right front and rear extension auxiliary frames 24, a clipper-type cutting blade body 28 extending in the left and right direction is attached in a horizontal manner. I'm trying to reap the roots.

A raking body 30 having a star wheel 31, a raking belt 32 and the like is disposed behind the culm raising body 27 and immediately above the cutting blade 28. As shown in FIG. The raking body 30 rakes the culm raised by the culm raising body 27 .

A lower conveying device 33 is arranged above the cutting blade 28 to convey rearward the base side of the stalks that have been raked by the raking member 30 . Ear tip conveying devices 34 and 35 and an upper conveying device 36 are arranged above the lower conveying device 33 for conveying the tips of harvested grain culms rearward. The upper conveying device 36 is disposed behind the tip conveying devices 34 and 35, and is vertically aligned with the front portion of the upper conveying device 36 at the lower position and the rear portion of the tip conveying devices 34 and 35 at the upper position. are arranged in duplicate. A vertical conveying device 57 is arranged behind the lower conveying device 33 for conveying the base side of the culm rearward. Behind the vertical conveying device 57, an auxiliary conveying device 58 is arranged to transfer the base side of the culm to the feed chain 12 of the threshing section 5. As shown in FIG. In the reaping unit 4, each driving unit except for the upper conveying device 36 is supplied with power from the engine 13 through the transmission shafts in the first transmission cylinder 21, the second transmission cylinder 22, and the third transmission cylinder 23, which are transmission mechanisms. , so that power is transmitted. Further, power of an electric motor 100 is transmitted to the upper conveying device 36 via a speed reducer.

The reaping unit 4 having the above configuration divides the grain culms planted in the field by the dividing member 25, raises the grain culm divided by the dividing member 25 by the grain raising member 27, and rakes it by the raking member 30. The root side of the grain culm is cut by the cutting blade body 28 while the grain is being squeezed. Then, the tips of the harvested culms are transferred from the tip conveying devices 34 and 35 to the upper conveying device 36 and conveyed backward. The base side of the harvested grain stalks are sequentially transferred from the lower transfer device 33 to the vertical transfer device 57 and the auxiliary transfer device 58 while being transferred backward, and transferred to the starting end of the feed chain 12 . That is, the culms are conveyed from the harvesting section 4 to the threshing section 5 .

The culm raising body 27, the tip conveying devices 34 and 35, and the upper conveying device 36 provided in the reaping unit 4 each have a function of locking and conveying the tip of the culm by means of locking claws 67 called tines. It is a culm conveying device. In this embodiment, the upper conveying device 36 as a grain culm conveying device will be described in detail with reference to FIGS. 3 to 5. FIG.

As shown in FIGS. 3 to 5, the upper conveying device 36 includes a pair of upper and lower cover bodies 60A and 60B, which are slightly curved and extend in the front-rear direction, and a locking member which locks the tip side of the culm. It has a claw 67 , and upright guide rails 80 and 81 that regulate the posture of the locking claw 67 , and a regulation portion 82 . The upper cover body 60A and the lower cover body 60B are arranged with a vertical gap so as to form a space S, and the space S is provided with a locking claw 67, standing guide rails 80 and 81, and a restricting portion 82. (See Figure 4).

Although the upper cover body 60A and the lower cover body 60B are different in that they are arranged symmetrically with the space S therebetween, they basically have the same configuration. Therefore, here, the upper cover body 60A will be described in detail, and the configuration of the lower cover body 60B common to the upper cover body 60A will be denoted by the same reference numerals in FIGS. 3 to 5, and detailed description thereof will be omitted. .

The upper cover body 60A includes an outer plate 61a forming the upper outer surface of the upper conveying device 36 and an inner plate 61b facing the lower cover body 60B with a space S therebetween. The outer plate 61a and the inner plate 61b are arranged facing each other with a vertical gap therebetween. Between the outer plate 61a and the inner plate 61b are a plurality of sprockets 63, 65, 71, 73, 75 including a driven sprocket 63 and a drive sprocket 65, and windings around these sprockets 63, 65, 71, 73, 75. An endless chain 66 or the like is provided.

Specifically, a driven sprocket 63 supported by a support shaft 62 and an endless chain 66 supported by a support shaft 70 are provided between the outer plate 61a and the inner plate 61b (corresponding to the upper part in FIG. 3). A first auxiliary sprocket 71 is provided to guide the movement of the .

A support shaft 62 of the driven sprocket 63 is fixed to a sprocket holder 76 , and the sprocket holder 76 is urged forward by a compression spring 78 fitted over a guide shaft 77 . As a result, when the endless chain 66 is about to become loose, the driven sprocket 63 is moved forward by the biasing force of the compression spring 78 to apply tension to the endless chain 66 .

The first auxiliary sprocket 71 is provided at a position away from the driven sprocket 63 in one of the left and right directions so that the locking pawl 67 moving in the vicinity of the first auxiliary sprocket 71 does not come into contact with the support shaft 62 that supports the driven sprocket 63. It is

A drive sprocket 65 supported by a drive shaft 64 and an endless chain 66 supported by a support shaft 72 are guided in the rear part (corresponding to the lower part in FIG. 3) between the outer plate 61a and the inner plate 61b. A second auxiliary sprocket 73 is provided. Power from an electric motor 100 provided close to the second auxiliary sprocket 73 is transmitted to the drive shaft 64 via a transmission. The direction of rotation of the electric motor 100 can be switched between forward and reverse directions by a control unit (not shown). The second auxiliary sprocket 73 is provided at a position away from the drive sprocket 65 in one of the left and right directions so that the locking claw 67 moving in the vicinity of the second auxiliary sprocket 73 does not come into contact with the drive shaft 64 that supports the drive sprocket 65 . It is

A third auxiliary sprocket 75 supported by a support shaft 74 is arranged between the driven sprocket 63 and the driving sprocket 65, and the endless chain 66 that moves between the driven sprocket 63 and the driving sprocket 65 moves. curving the path.

As shown in FIGS. 4 and 5, the support shaft 62 of the driven sprocket 63 provided on the upper cover body 60A and the lower cover body 60B consists of one vertically connected shaft. As with the support shaft 62 of the driven sprocket 63, the drive shaft 64 of the drive sprocket 65 provided on the upper cover body 60A and the lower cover body 60B is also composed of one vertically connected shaft.

On the other hand, the support shafts 70, 72, 74 of the first auxiliary sprocket 71, the second auxiliary sprocket 73, and the third auxiliary sprocket 75 provided on the upper cover body 60A and the lower cover body 60B are vertically divided by the space S. ing. As a result, gaps are formed between the support shafts 70, 72, 74 of the upper cover body 60A and the support shafts 70, 72, 74 of the lower cover body 60B so that the body portion 67a of the locking claw 67 can pass therethrough. It is

Between the endless chain 66 provided on the upper cover body 60A and the endless chain 66 provided on the lower cover body 60B, a plurality of locking claws 67 are provided at intervals in the circumferential direction. As the drive sprocket 65 rotates, the pair of endless chains 66 , 66 rotates in one direction (hereinafter referred to as the transport direction), and the locking claw 67 circulates within the space S. At this time, the locking claws 67 that move between the driven sprocket 63 and the third auxiliary sprocket 75 and between the drive sprocket 65 and the third auxiliary sprocket 75 project outward from the endless chains 66 , 66 . The locking claw 67, which moves backward while locking the tip of the grain culm and moves between the first auxiliary sprocket 71 and the second auxiliary sprocket 73, protrudes inward from the endless chains 66, 66. Move forward.

Here, when the endless chains 66, 66 are circulated in the conveying direction on the route in which the engaging claws 67 circulate within the space S, the engaging claws 67 protrude outward from the endless chains 66, 66. The route R1 moving backward while engaging the tip of the culm in a posture is referred to as the "action side route R1", and the locking claw 67 moves forward in a posture protruding inward from the endless chains 66, 66. The route R2 is referred to as the "non-operating route R2", and the route R3 connecting the operating route R1 and the non-operating route R2 on the front side is referred to as the "front reverse route R3". A route R4 connecting with the side route R2 is referred to as a "reverse reverse route R4".

The locking claw 67 has a rod-shaped main body portion 67a that protrudes in the left-right direction from between the outer plate 61a and the inner plate 61b in the working-side path R1 and locks the culm, and the locking claw extends from one end of the main body portion 67a. A connecting portion 67b protruding in a direction perpendicular to the moving direction of 67 (that is, in the vertical direction), a sliding portion 67c protruding from the connecting portion 67b in the moving direction of the locking claw 67, and one end portion of the main body portion 67a. and a guide portion 67d protruding in the direction opposite to the direction in which the main body portion 67a extends.

In this embodiment, the connecting portion 67b and the sliding portion 67c are integrally provided on both sides of the main body portion 67a in the vertical direction by using a synthetic resin such as nylon. 67e.

The locking claw 67 is arranged on the upper cover body 60A so that the connecting portion 67b is positioned between the annular endless chain 66 provided on the upper cover body 60A and the annular endless chain 66 provided on the lower cover body 60B. and the lower cover body 60B. The locking claw 67 is rotatably attached to the pair of endless chains 66, 66 by inserting a pin 68 that vertically connects the pair of endless chains 66, 66 into the connecting portion 67b. In other words, the pair of endless chains 66 , 66 are provided on both sides of the locking claw 67 so as to sandwich the connecting portion 67 b of the locking claw 67 from the direction perpendicular to the moving direction of the locking claw 67 .

The locking claw 67 contacts with the upright guide rails 80 and 81 and the restricting portion 82 provided in the space S, so that the attitude of the engaging claw 67 when moving within the space S is restricted.

The upright guide rail 80 sandwiches the connecting portion 67b and the sliding portion 67c of the locking claw 67 moving on the working-side route R1, and the locking claw 67 protrudes outward from the endless chains 66, 66 on the working-side route R1. The posture of the locking claw 67 is regulated as follows. The erecting guide rail 80 is provided between the driven sprocket 63 and the drive sprocket 65 via the third auxiliary sprocket 75 .

The upright guide rail 81 sandwiches the connecting portion 67b and the sliding portion 67c of the locking claw 67 that moves on the non-working side route R2, and the locking claw 67 moves toward the inside of the endless chains 66, 66 on the non-working side route R2. The posture of the locking claw 67 is restricted so as to protrude. That is, the upright guide rail 81 regulates the attitude of the locking claw 67 so that the locking claw 67 faces substantially the same direction as the working-side route R1 in the non-working-side route R2. The erecting guide rail 81 is provided between the first auxiliary sprocket 71 and the second auxiliary sprocket 73 .

As shown in FIGS. 3 and 5, the restricting portion 82 is a rod-shaped member provided along the front reversing path R3, and has an end portion 82a on the side of the driven sprocket 63 and an end portion 82b on the side of the first auxiliary sprocket 71. is bent backwards.

When the locking pawl 67 enters the front reversing route R3 from the non-acting path R2, the guide portion 67d of the locking pawl 67 first contacts the end portion 82b of the restricting portion 82 on the first auxiliary sprocket 71 side. As a result, the tip of the locking claw 67 is tilted forward to prevent the locking claw 67 from coming into contact with the support shaft 62 of the driven sprocket 63 . Thereafter, when the locking claw 67 moves further toward the action-side path R1, the restricting portion 82 is inserted into the concave portion 67e of the locking claw 67 and comes into contact with the body portion 67a of the locking claw 67 and the guide portion 67d. As a result, the restricting portion 82 restricts the posture of the locking claw 67 so that it moves along the front reverse path R3 while facing substantially the same direction as the working-side path R1 and the non-working-side path R2.

Further, when the locking claw 67 enters the front side reversing route R3 from the working side path R1, the restricting portion 82 is inserted into the concave portion 67e of the locking claw 67 and comes into contact with the main body portion 67a of the locking claw 67, thereby The attitude of the locking claw 67 is regulated so that it moves along the front side reversing path R3 while facing substantially the same direction as the path R1 and the non-acting side path R2.

A rotating shaft 83 is provided at an end portion 82b of the restricting portion 82 on the first auxiliary sprocket 71 side. As a result, the restricting portion 82 is rotatably provided around the rotating shaft 83 so that the end portion 82a on the side of the driven sprocket 63 approaches and separates from the front reversing path R3. Further, the restricting portion 82 is biased by a biasing portion 84 so as to press the locking claw 67 toward the driven sprocket 63 .

In this specification, "substantially the same direction" is a concept that includes not only the completely same direction but also the case where the main body portion 67a of the locking claw 67 forms an angle of 45 degrees or less.

In such an upper transport device 36, when the electric motor 100 rotates in one direction (forward rotation direction), the pair of endless chains 66, 66 are driven to rotate in the transport direction. Along with this, the locking claw 67 moves rearward in the working-side route R1 in a posture protruding outward from the endless chains 66, 66, and conveys the tip of the culm rearward.

After moving along the working path R1, the locking claw 67 moves to the non-working path R2 through the rear reversal path R4 while facing substantially the same direction as when moving along the working path R1. .

The locking claw 67 protrudes inward from the endless chains 66, 66, and moves forward along the non-operating route R2 in a posture facing substantially the same direction as when the operating route R1 is moved.

After moving along the non-working path R2, the locking claw 67 passes through the front reversing path R3 while facing substantially the same direction as when moving through the working path R1 and the non-working path R2. Return to route R1.
Then, the locking claw 67 again moves rearward along the working-side path R1 while projecting outward from the endless chains 66, 66, thereby moving the tips of the culms rearward.

Also, in the upper conveying device 36, when the electric motor 100 rotates in the other direction (reverse direction), the pair of endless chains 66, 66 are circulated in the direction opposite to the conveying direction (hereinafter, this direction is referred to as the reverse direction). . Accompanying this, after the locking claw 67 moves forward in the working-side route R1 in a posture protruding outward from the endless chains 66, 66, it moves in substantially the same direction as when the working-side route R1 moves. While facing the direction, move to the non-operating side route R2 through the front side reversing route R3.

The locking claw 67 protrudes inward from the endless chains 66, 66, and moves rearward along the non-operating route R2 while facing substantially the same direction as when the operating route R1 is moved. After that, the locking claw 67 returns to the working path R1 through the rear reversing path R4 while facing substantially the same direction as when moving through the working path R1 and the non-working path R2.

In the upper conveying device 36 of the present embodiment having the above configuration, the locking claw 67 moves in a posture protruding outward from the endless chains 66, 66 in the working-side route R1, and moves to the endless chain 66 in the non-working-side route R2. , 66 in a protruding posture. In other words, the locking claw 67 circulates substantially in the same direction regardless of whether the endless chain 66 is rotated in the conveying direction or the reverse direction.

For this reason, in the upper conveying device 36 of the present embodiment, the upright locking claw projecting outward of the endless chain is set in a laid down posture along the moving direction of the endless chain, or the laid down locking claw is set in an upright posture. No need for cams or guides for As a result, in the upper conveying device 36 of the present embodiment, the locking claws 67 can be reliably circulated in both the conveying direction and the reverse direction with a simple structure without breaking the locking claws 67 .

Moreover, in the upper conveying device 36 of the present embodiment, the engaging claws 67 are largely rotated between the upright posture and the lying posture even when the engaging claws 67 are circulated in either the conveying direction or the reverse direction. Therefore, it is possible to suppress the impact noise generated during the circulating movement.

Further, in the upper conveying device 36 of the present embodiment, the pair of endless chains 66, 66 are provided on both sides of the locking claw 67 so as to sandwich the connecting portion 67b of the locking claw 67. can be supported from both sides to improve the durability of the locking claw 67 .

Further, in the upper conveying device 36 of the present embodiment, the support shafts 70 and 72 of the first auxiliary sprocket 71 and the second support sprocket 73 are divided vertically, and the support shafts 70 and 72 of the upper cover body 60A and the lower cover body A gap is formed between the support shafts 70 and 72 of 60B so that the body portion 67a of the locking claw 67 can pass therethrough. Therefore, the locking pawl 67 moving along the non-working path R2 does not interfere with the spindles 70 and 72 that support the first auxiliary sprocket 71 and the second auxiliary sprocket 73, and the locking pawl 67 moves along the non-working path R2. A structure in which the endless chains 66, 66 protrude inward at R1 can be easily realized.

Further, in the upper conveying device 36 of the present embodiment, the regulating portion 82 that regulates the attitude of the locking claw 67 moving on the front side reversing path R3 presses the locking claw 67 toward the driven sprocket 63 by the biasing portion 84. urged to do so. Therefore, when the endless chain 66 becomes slack and the driven sprocket 63 moves forward due to the biasing force of the compression spring 78, the restricting portion 82 can also move forward following this movement. While applying tension, the posture of the locking claw 67 moving on the front side reversing path R3 can be regulated.

In this embodiment, the upper conveying device 36 as a grain culm conveying device has been described. It may be constructed such that it is moved while engaging with the grain culm in an outwardly protruding posture, and the engaging claw is moved in an inwardly protruding posture of the endless chain on the non-working side route R2.

Further, in the upper conveying device 36 of the above-described embodiment, the case where the drive sprocket 65 is rotated by receiving power from the electric motor 100 equipped with a transmission to circulate the locking claw 67 has been described, but the drive sprocket 65 There is no particular limitation on the driving source that applies the driving force to the . For example, power from the engine 13 may be transmitted to the drive sprocket 654 via a transmission mechanism such as a transmission shaft to circulate the locking claw 67 .

Although the embodiments of the present invention have been described above, the above embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

36 Upper conveying device 60A Upper cover body 60B Lower cover body 61a Outer plate 61b Inner plate 62 Support shaft 63 Driven sprocket 64 Support shaft 65 Drive sprocket 66 Endless chain 67 Engagement claw 67a Body portion 67b Connection portion 67c Sliding portion 67d Guide portion 67e Concave portion 68 Pin 70 Support shaft 71 First auxiliary sprocket 72...Support shaft 73...Second auxiliary sprocket 74...Support shaft 75...Third auxiliary sprocket 76...Sprocket holder 77...Guide shaft 78...Compression spring 80...Upright guide rail 81...Upright guide rail , 82... Regulating portion, 83... Rotating shaft, 84... Biasing portion

Claims (5)

An annular endless chain wound around a driving sprocket and a plurality of locking pawls attached to the endless chain at intervals,
The locking pawl circulates through an action-side path and a non- action-side path in which it moves while engaging with the grain culm ,
Regardless of whether the endless chain is rotated in either the conveying direction or the direction opposite to the conveying direction, the locking pawl moves along the working side path while projecting outward from the endless chain, A grain culm conveying device that moves along the non-working side path while projecting inward from the endless chain . 2. The culm conveying apparatus according to claim 1, wherein said endless chains are provided on both sides of said locking claw so as to sandwich said locking claw from a direction perpendicular to the moving direction of said locking claw. A pair of sprockets for guiding the movement of the endless chain provided on both sides of the locking pawl in the non-working path,
3. The grain culm conveying apparatus according to claim 2, wherein a support shaft for supporting one of said pair of sprockets and a support shaft for supporting the other of said sprockets are separated to form a gap through which said locking pawl passes. The locking pawl has a rod-shaped main body portion for locking the culms, and a connecting portion that protrudes from one end of the main body portion in a direction perpendicular to the movement direction of the locking pawl and is connected to the endless chain. , a sliding portion protruding from the connecting portion in the moving direction of the locking pawl, and a guide portion protruding from one end of the main body portion in a direction opposite to the extending direction of the main body portion. Grain culm conveying device according to any one of the above. a driven sprocket that applies tension to the endless chain in a reversal path connecting the non-working side path and the working side path;
a regulating portion that regulates the posture of the locking pawl that moves on the reversing path;
The grain culm conveying device according to any one of claims 1 to 4, further comprising a biasing portion that biases the restricting portion so as to press the locking claw toward the driven sprocket.

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