JP5314440B2 - Exhaust cutting device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a technique for a waste cutting apparatus, and more particularly to a technique for switching a waste cutting length in a waste cutting apparatus.

  2. Description of the Related Art Conventionally, a waste cutting apparatus in a harvester such as a combiner has a switching mechanism for switching the length of waste. In the waste cutting apparatus, there are a high-speed rotary shaft in which a large-diameter rotary blade and a small-diameter rotary blade are arranged at a predetermined interval, and a low-speed rotary shaft in which the blade tip of the low-speed rotary blade is close to the blade tip of the large and small rotary blades Are arranged in parallel. The switching mechanism adjusts an inter-axis distance between the low-speed rotation shaft and the high-speed rotation shaft, and switches the waste between a long size and a short size. For example, as in Patent Document 1, when switching the length of the excision cutting length, the switching lever is turned to release the cutter shaft locked by the locking means. In the released state, the switching lever is rotated to move the low-speed rotation shaft, and the inter-axis distance with the high-speed rotation shaft is changed. And when performing the short cutting operation of the waste, the low-speed rotating shaft and the high-speed rotating shaft are brought close to each other so that the low-speed rotating blade, the large-diameter high-speed rotating blade, and the small-diameter high-speed rotating blade overlap each other. In addition, when performing a long cutting operation of the waste, the technology of the waste cutting device in which the low-speed rotating shaft and the high-speed rotating shaft are kept away so that only the low-speed rotating blade and the large-diameter high-speed rotating blade overlap each other is publicly known. Yes.

JP 2004-159555 A

  In the conventional waste cutting device, the cut length of the waste is adjusted in two steps, short and long, and when it is dripping without cutting, another operation to rotate the switching cover is required. In addition, when an accessory device such as a binding machine is attached to the rear part of the fuselage, switching to the dripping work while the accessory device is attached requires operations to remove and release the accessory device. It was hanging.

  That is, as described above, there is a problem that it takes time to switch the short cut, long cut, and dripping of the waste in the waste cutting apparatus.

  In view of the above situation, an object of the present invention is to provide a waste cutting apparatus that can easily switch the cutting length of waste.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

In Claim 1, while fixing the some rotary blade at predetermined intervals, the high-speed rotary shaft which fixed the several large diameter rotary blade and the small diameter rotary blade alternately at predetermined intervals, and the said high-speed rotary shaft A waste cutting apparatus comprising: a low-speed rotating shaft arranged so as to be close or separable with respect to the high-speed rotating shaft; and a switching mechanism that can switch and fix the low-speed rotating shaft to a close position or a separated position with respect to the high-speed rotating shaft. the switching mechanism includes a Geneva mechanism for intermittently rotating motion, and a connecting mechanism for connecting the said Geneva mechanism and low speed shaft, the position of the low speed shaft and can be switched, wherein the connecting mechanism, low speed shaft A positioning cam for supporting the positioning cam, a plurality of positioning pins for holding the positioning cam at a predetermined position, a first arm for connecting and rotating with the positioning cam, the first arm and the Geneva mechanism In which and a second arm forming.

According to a second aspect of the present invention, in the rejection cutting apparatus according to the first aspect, the low-speed rotating shaft is switched to three stages of a short cutting position, a long cutting position, and a dripping position by the plurality of positioning pins. It is configured to be possible .

According to a third aspect of the present invention, in the rejection cutting apparatus according to the first or second aspect, the Geneva mechanism abuts on the switching operation input shaft, a cam fixed on the input shaft, and the cam. A disc and an index pin projecting at a predetermined interval on the disc are provided, and a reversal prevention recess is formed in the cam .

  As effects of the present invention, the following effects can be obtained.

  In the first aspect, the position of the low-speed rotation shaft can be easily switched by the intermittent rotation of the Geneva mechanism. In addition, the rotational movement of the Geneva mechanism can be easily controlled electrically, and the position of the low-speed rotating shaft can be easily switched.

In addition , the low-speed rotation shaft can be reliably held at the switching position.

In claim 2 , the waste can be discharged in three states, a long cut, a short cut, and a run-off, and cut or removed as it is according to the purpose of use of the discharged waste. It becomes possible to release.

  In particular, since the waste passes through the waste cutting device when the waste flows down, there is little influence of the wind, and the discharge posture of the waste is stabilized.

According to the third aspect of the present invention, even if the switching operation input shaft is reversely rotated, the reverse rotation is prevented by the reverse rotation preventing recess, and the Geneva mechanism and the connecting mechanism are not damaged.

The side view which showed the whole structure of the combine which concerns on one Example of this invention. The top view which showed the structure of the exclusion cutting device. The side view which showed the structure of the drive part of a waste cutting device. The side view which showed the structure and intermittent rotation motion of the Geneva mechanism in steps. (A) Side view showing the relationship between the cam and the positioning pin at the removal short dimension cutting position, (b) Side view showing the relationship between the cam and the positioning pin at the removal long dimension cutting position, (c) No rejection The side view which showed the relationship between the cam and positioning pin in a cutting position. The side view which showed the structure of the rejection cutting device in the case of making a low speed rotating shaft into a short cutting position. The side view which showed the structure of the rejection cutting device in the case of making a low speed rotating shaft into a long cutting position. The side view which showed the structure of the waste cutting device at the time of making a low speed rotating shaft into a dripping position.

  Next, an overall schematic configuration of the combine 1 including the waste cutting apparatus 20 according to the embodiment of the present invention will be described. For the sake of explanation, the direction of the arrow A in the figure is defined as “front”, and the left and right and the rear are determined in the forward direction.

  As shown in FIG. 1, the combine 1 rips cereal grains such as rice and wheat from the field, travels through the field, threshes grains from the cereal, and performs a harvesting operation. The combine 1 of this embodiment is a self-decomposing combine that threshes only the head portion with a grain among the harvested cereals. The combine 1 mainly includes a reaping device 2, a threshing device 3, a sorting device 4, an operating unit 9, a waste disposal device 5, and the like.

  The reaping device 2 is arranged at the front part of the combine 1 and includes a pulling device, a lower transportation device, a tip transportation device, a cutting blade, and the like, and harvests the culm from the field and passes the culm to the threshing device 3.

  The threshing device 3 is disposed behind the reaping device 2, and mainly includes a feed chain 3a, a handling cylinder 3b, and the like. The threshing device 3 separates the cereal grains from the culm by the rotation of the barrel 3b while conveying the cereals received from the reaping device 2 from the front to the back with the feed chain 3a in a state of being laid down. )

  The sorting device 4 is arranged below the threshing device 3 and separates swarf and dust mixed with the grains threshed by the threshing device 3 by wind sorting or swing sorting.

  The refined grains separated from the swarf and the like by the sorting device 4 are transferred to a Glen tank 7 provided on the right side of the threshing device 3 through the milling cylinder 6 and stored. A discharge auger 8 is connected to the Glen tank 7 in communication. By operating the discharge auger 8, it is possible to carry the fine particles stored in the Glen tank 7 to the outside of the Glen tank 7 through the discharge auger 8.

  The operation unit 9 is disposed in front of the Glen tank 7, and an operator operates the combine 1 and operates various devices.

  The waste treatment device 5 is arranged behind the threshing device 3, and conveys the threshed cereals (hereinafter simply referred to as “exhaust”) received from the feed chain 3a to the rear by the waste chain 5a. Apply the process.

  Next, the configuration of the waste cutting apparatus 20 provided in the waste disposal apparatus 5 will be described with reference to FIGS. 1 to 3.

  The waste cutting device 20 cuts the waste conveyed by the waste chain 5a into a predetermined length. The waste cutting apparatus 20 mainly includes a cutting case 21, a high-speed rotary shaft 22, a large-diameter rotary blade 22a, a small-diameter rotary blade 22b, a low-speed rotary shaft 23, a rotary blade 23a, a switching mechanism 30, and the like.

  As shown in FIG. 1, the cutting case 21 is disposed below and behind the waste chain 5a. The cutting case 21 is configured in a box shape, the upper and lower sides are opened, and the upper opening can be closed by a switching cover. Side plates 21a and 21a (see FIG. 2, but the right side plate 21a is omitted) are provided on the left and right sides. As shown in FIG. 2, inside the cutting case 21, a high-speed rotation shaft 22 and a low-speed rotation shaft 23 are horizontally mounted in parallel in the left-right direction between the left and right side plates 21 a and 21 a, and the low-speed rotation shaft 23 is It arrange | positions so that it may be located in front upper direction of the high speed rotating shaft 22. FIG. As shown in FIGS. 2 and 3, guide holes 21 b are opened as arc-shaped elongated holes centering on a support shaft 24, which will be described later, on the left and right side plates 21 a (not shown on the right side). The low-speed rotating shaft 23 is inserted into the guide hole 21b at both ends thereof, is supported by the guide hole 21b, and is slidable in the front-rear direction. Therefore, the distance between the high-speed rotation shaft 22 and the low-speed rotation shaft 23 can be changed within the moving range of the low-speed rotation shaft 23 (the range of the guide hole 21b).

  Further, as shown in FIG. 2, a plurality of disk-shaped large-diameter rotary blades 22a, 22a,... And small-diameter rotary blades 22b, 22b,. Be placed. A plurality of disk-shaped rotary blades 23a, 23a,... Are arranged on the low-speed rotary shaft 23 so that the tips of the large-diameter rotary blade 22a and the small-diameter rotary blade 22b overlap.

  As shown in FIG. 2 or FIG. 3, the high-speed rotation shaft 22 is rotatably supported by the left and right side plates 21a and 21a. An end portion of the high-speed rotation shaft 22 protrudes outward from the side plate 21a. An input pulley 22d and a drive sprocket 22c are juxtaposed in the axial direction and fixed to the protruding end of the high-speed rotating shaft 22. As shown in FIG. 2, the low-speed rotation shaft 23 is rotatably supported by an arm mechanism 60 described later on the inner side of the side plate 21a. Moreover, the edge part of the low speed rotating shaft 23 protrudes outward from the side plates 21a and 21a. As shown in FIG. 3, a large-diameter gear 23 b is fixed to the protruding end portion of the low-speed rotating shaft 23.

  As shown in FIG. 2 or FIG. 3, the support shaft 24 is disposed below the low-speed rotation shaft 23, is rotatably supported by the side plate 21a, and is disposed in parallel to the low-speed rotation shaft 23. The The support shaft 24 is rotatably supported by the side plate 21a, protrudes outward, and is accommodated in the cutting case 21. A driven sprocket 24a and a small-diameter gear 24b are fixed to the protruding portion of the support shaft 24, respectively.

  A chain 22f is wound between a drive sprocket 22c on the high-speed rotation shaft 22, a driven sprocket 24a on the support shaft 24, and a sprocket (not shown) below them. Further, the large-diameter gear 23b on the low-speed rotation shaft 23 and the small-diameter gear 24b on the support shaft 24 are meshed with each other. The power transmitted from the engine (not shown) can be transmitted to the input pulley 22d on the high-speed rotation shaft 22 via the drive belt 22e.

  When power (rotational force) from the engine is transmitted to the input pulley 22d through the drive belt 22e, the high-speed rotation shaft 22 rotates counterclockwise in FIG. Due to this rotation, the drive sprocket 22c also rotates in the same direction. When power is transmitted from the drive sprocket 22c to the driven sprocket 24a via the chain 22f, the support shaft 24 is rotated counterclockwise in FIG. 3, and the small-diameter gear 24b is rotated to be illustrated via the chain 22f. The diffusion conveyor placed below is not rotated.

  Then, power is transmitted from the small diameter gear 24b to the large diameter gear 23b, and the low speed rotating shaft 23 rotates clockwise in FIG. Due to the rotation of the high-speed rotary shaft 22 and the low-speed rotary shaft 23, the large-diameter rotary blade 22a and the small-diameter rotary blade 22b on the high-speed rotary shaft 22 and the rotary blade 23a on the low-speed rotary shaft 23 shown in FIG. Each will rotate in the opposite direction. Note that the rotation speed of the low-speed rotation shaft 23 is set to be lower than the rotation speed of the high-speed rotation shaft 22 due to the configuration such as the gear ratio.

  Next, the configuration of the switching mechanism 30 will be described with reference to FIGS. 2 and 4 to 8. As shown in FIGS. 6 to 8, the switching mechanism 30 adjusts the distance between the high-speed rotation shaft 22 and the low-speed rotation shaft 23 by adjusting the position of the low-speed rotation shaft 23 in the front-rear direction, and cuts the waste. It is a mechanism that adjusts the excretion length. Further, the switching mechanism 30 of the present embodiment enables the low-speed rotating shaft 23 to be switched and fixed at the short cutting position shown in FIG. 6, the long cutting position shown in FIG. 7, and the dripping position shown in FIG. is there. Note that the left and right switching mechanisms 30 and 30 are configured to be substantially bilaterally symmetric, and thus the description of the right switching mechanism 30 is omitted.

  The switching mechanism 30 mainly includes an arm mechanism 60, a Geneva mechanism 40, a connection mechanism 50, and the like. As shown in FIGS. 2 and 6 to 8, the arm mechanism 60 is a mechanism for holding the low-speed rotation shaft 23 in a predetermined position, and is disposed inside the side plate 21 a of the cutting case 21. An arm 25, a support shaft 24, and the like are provided.

  As shown in FIGS. 6 to 8, the support shaft 24 that supports the arm mechanism 60 is located below the rotary blade 23a on the low-speed rotary shaft 23 and in front of the high-speed rotary shaft 22, and is rotatable by the side plate 21a. It is supported by. The lower arm 25 is rotatably supported at the lower portion thereof by the support shaft 24, and the low-speed rotation shaft 23 is rotatably supported at the upper portion thereof. As shown in FIGS. 2 and 6, a lower portion of the upper arm 26 is fixed to an upper portion of the lower arm 25, and the upper arm 26 is disposed on the inner side of the body from the lower arm 25. As shown in FIGS. 6 to 8, the low-speed rotation shaft 23 is rotatably supported on the lower part of the upper arm 26 and the upper part of the lower arm 25. Also, one end of an arm shaft 27 that rotatably supports a positioning cam 51 described later is fixed to the upper portion of the upper arm 26. The arm shaft 27 passes through a cam guide hole 21c opened in the side plate 21a and protrudes outward. The cam guide hole 21c is formed as an arc-shaped long hole with the support shaft 24 as the center.

  The Geneva mechanism 40 is an indexing device that converts the rotation of the switching operation input shaft 41 into an intermittent rotational motion, and is rotated at a low speed via the coupling mechanism 50 and the arm mechanism 60 described later by the intermittent rotational motion. The position of the shaft 23 is moved substantially in the front-rear direction. If the position of the low-speed rotating shaft 23 can be moved via the coupling mechanism 50 and the arm mechanism 60, the cam mechanism may be used instead of the Geneva mechanism 40, and the arm mechanism 60 is operated only by the Geneva mechanism 40. However, the present invention is not limited to this.

  As shown in FIGS. 2, 4 and 6 to 8, the Geneva mechanism 40 is disposed outside the side plate 21a, and mainly includes a switching operation input shaft 41, a disc shaft 42, a cam 43, and a disc 44. And indexing pins 45a and 45b.

  The switching operation input shaft 41 and the disc shaft 42 are supported on the upper and rear sides of the low-speed rotation shaft 23 so as to protrude outward from the side plate 21a. In the present embodiment, the switching operation input shaft 41 is disposed on the upper side and the disc shaft 42 is disposed on the lower side, but the present invention is not limited thereto. The cam 43 includes a semicircular semicircular cam 43a and a deformed cam 43b, and is fixed on the switching operation input shaft 41. Specifically, on the switching operation input shaft 41, a semicircular cam 43a is disposed on the side plate 21a side, and a deformed cam 43b is disposed at a predetermined interval in the axial direction on the switching operation input shaft 41. Further, as shown in FIG. 4, the deformed cam 43 b has a protrusion 43 e formed in a substantially “<” shape from the outer periphery of the disk portion 43 d fixed to the switching operation input shaft 41. A protrusion 43f and a reverse rotation preventing recess 43c are further formed in the middle of 43e.

  Hereinafter, for the explanation in the Geneva mechanism 40, a surface facing the cutting case 21 side is a front surface, and a surface facing the side plate 21a side is a back surface.

  The center of the disc 44 disposed below the cam 43 is fixed on the disc shaft 42, and is disposed between the semicircular cam 43a and the deformed cam 43b in the axial direction. One end of a plurality of cylindrical index pins 45a (71a, 71b, 71c) is fixedly provided on the surface of the circular plate 44 at a predetermined angle (120 degrees in this embodiment) on a concentric circle. Yes. In addition, on the back surface of the disc 44, an indexing pin having the same shape and shape as the surface is provided at a predetermined angle (120 degrees in the present embodiment) on a concentric circle and at approximately the middle of the position of each indexing pin 45a on the surface. One end of 45b (72a * 72b * 72c) is fixed. That is, the index pins 45a and 45b protrude alternately on the front and back surfaces at a predetermined interval on a concentric circle. In addition, one end of a second arm 54 described later is rotatably connected to one portion of the index pin 45a on the surface.

  Further, the switching operation input shaft 41 and the disc 44 described above are always slid or in contact with each other. The outer edge portion of the deformed cam 43b and the outer peripheral portion of the index pin 45a, and the outer edge portion of the semicircular cam 43a and the outer peripheral portion of the index pin 45b are in a relationship of sliding, abutting, and separating according to the respective rotation directions. . The configuration of the Geneva mechanism 40 is not limited to the above-described structure, and a known Geneva mechanism may be employed.

  The power of the Geneva mechanism 40 is connected to the switching operation input shaft 41. In this embodiment, the switching operation input shaft 41 is rotationally driven by a motor (not shown), the motor is connected to control means, and the control means is connected to a change-over switch (not shown) provided in the operation unit 9. Further, although the rotation drive means of the switching operation input shaft 41 is an actuator such as a motor, the power of the engine or rotation by manual operation may be used without any limitation.

  Here, a process in which the cam 43 rotates once will be described. At the initial position shown in FIG. 4A, the index pin 71a on the surface of the disc 44 and the disc portion 43d of the deformed cam 43b are in contact. Further, the index pins 72a and 72b at the two upper portions on the back surface of the disc 44 are in contact with the arc portion 81 of the semicircular cam 43a.

  When the changeover switch is operated from the above state, the motor is driven to rotate the changeover operation input shaft 41 once. That is, when the motor is operated by the operation of the changeover switch, the changeover operation input shaft 41 rotates clockwise, and the protrusion 43e of the deformed cam 43b comes into contact with the index pin 71a that has been in sliding contact with the disc portion 43d. Press to rotate the disc 44 a predetermined amount counterclockwise. Immediately before the protrusion 43e contacts the index pin 71a, the arc portion 81 of the semicircular cam 43a is separated from the index pin 72b. Then, as shown in FIG. 4B, the index pin 71a is pushed by the projection 43f, and the disk shaft 42 is rotated.

  4B, the switching operation input shaft 41 rotates clockwise, and the projection 43f of the projection 43e slides with the index pin 71a. The projection 43f causes the disc 44 to rotate. It is configured to assist. Further, when the protrusion 43e pushes the index pin 71a and the disc shaft 42 rotates and the outer peripheral portion of the protrusion 43e moves away from the index pin 71a, as shown in FIG. 4C, the semicircular cam 43a The string 82 contacts and pushes the indexing pin 72b. Therefore, the disk 44 continues to rotate counterclockwise.

  When the end of the chord 82 of the semicircular cam 43a is positioned on the index pin 72b and the pushing operation is finished, the rotation of the disk 44 stops, and the switching operation input shaft 41 rotates to The part 81 comes into slidable contact with the index pins 72b and 72c, and stops in a state where the cam 43 is rotated once as shown in FIG. 4 (d) from the initial position in FIG.

  That is, when the cam 43 rotates clockwise, the disk 44 rotates one third of the counterclockwise direction. Further, the switching operation input shaft 41 is always in contact with or slides on the outer periphery of the disc 44, and since the arc portion 81 is in sliding contact with the index pins 45b and 45b at the initial position, the disc 44 is It cannot be rotated and is in a fixed state.

  Further, when the switching operation input shaft 41 is rotated manually, the switching operation input shaft 41 may be erroneously rotated counterclockwise (see FIG. 4). In order to prevent the reverse rotation of the switching operation input shaft 41, as shown in FIG. 4, the deformed cam 43b is provided with a reverse rotation preventing recess 43c. That is, when the switching operation input shaft 41 is rotated counterclockwise from the state of FIG. 4A, the index pin 71a is fitted into the reverse rotation preventing recess 43c. When further rotated, the indexing pin 71c hits the surface opposite to the reverse rotation preventing recess 43c, and the switching operation input shaft 41 cannot be rotated further counterclockwise, and the switching operation input shaft 41 can only be rotated clockwise. It has become.

  Next, the connecting mechanism 50 will be described with reference to FIGS. 2 and 5 to 8. The coupling mechanism 50 is a mechanism that connects the arm mechanism 60 and the Geneva mechanism 40 and is disposed in front of the Geneva mechanism 40 outside the side plate 21a. The coupling mechanism 50 mainly includes an arm shaft 27, a positioning cam 51, positioning pins 52a, 52b, and 52c, a first arm 53, a second arm 54, and the like.

  As shown in FIGS. 2 and 6, the arm shaft 27 is inserted horizontally through the cam guide holes 21 c opened in the left and right side plates 21 a, 21 a, is horizontally mounted, and the left and right side plates 21 a of the cutting case 21. -It protrudes outward from 21a.

  The positioning cam 51 is a cam that positions the low-speed rotating shaft 23 via the arm mechanism 60. As shown in FIG. 5B, the positioning cam 51 is formed in a substantially fan shape spreading downward, and its substantially arcuate outer peripheral lower portion 51g and front and rear outer peripheral portions 51h and 51f are formed with smooth curves. Has been. At one end of the positioning cam 51, one end of the arm shaft 27 is fixed. Further, as shown in FIG. 2 or 5, a communication hole 51d is opened inside the outer peripheral lower portion 51g of the positioning cam 51, and three engagement holes 51a, 51b, 51c are formed in the communication hole 51d. Is formed. On the other hand, positioning pins 52a, 52b, and 52c are protruded from the lower side of the cam guide hole 21c at predetermined positions on the outer side of the side plate 21a. The positioning pin 52b in the center in the side view is inserted into the communication hole 51d and is configured to engage with any one of the locking holes 51a, 51b, 51c, and the positioning pins 52a, 52c on both sides of the positioning cam 51 It is comprised so that it may contact | abut or slidably contact with the outer periphery.

  Further, as shown in FIG. 5B, an engaging pin 51e is provided on the upper portion of the positioning cam 51 (the central portion on the opposite side of the outer peripheral lower portion 51g). The first arm 53 shown in FIG. That is, a long hole 53a that is long in the longitudinal direction is opened at one end of the first arm 53, and the engagement pin 51e is inserted into the long hole 53a. The other end of the first arm 53 is rotatably supported by an arm shaft 53b protruding outward from the side plate 21a. A shaft 53c is fixed to the middle portion of the first arm 53, and one end of the second arm 54 is rotatably supported on the shaft 53c. The other end of the second arm 54 is rotatably connected to only one part (the index pin 71c in FIG. 4) of the index pin 45a of the Geneva mechanism 40.

  With the above configuration, the movement of the switching mechanism 30 will be described below. When the changeover switch is operated and the motor is driven from the state of the dripping position in FIG. 8 and the switching operation input shaft 41 of the Geneva mechanism 40 makes one clockwise rotation, the disk 44 is rotated and connected to the index pin 45a. The second arm 54 thus pushed is pushed rearward, and the index pin 45a is located at the lower right as shown in FIG. 6 (short cutting position). As the second arm 54 moves rearward, the first arm 53 connected to the second arm 54 rotates rearward about the arm shaft 53b that is a fixed fulcrum. By this rotation, the engaging pin 51e penetrating through the elongated hole 53a on the upper part of the first arm 53 moves rearward. By the rearward movement of the engagement pin 51e, the positioning cam 51 rotates about the arm shaft 27 and moves rearward as shown in FIG. 6 or 5A. At this time, the arm shaft 27 is moved to the rearmost position along the cam guide hole 21c. The positioning cam 51 rotates clockwise, the rear outer peripheral portion 51f stops rotating at the position where it abuts on the positioning pin 52c, and the positioning pin 52b is positioned in the locking hole 51c. Note that when the positioning cam 51 rotates, the engagement pin 51e slides in the long hole 53a in the vertical direction. The upper arm 26 connected to the arm shaft 27 is rotated and moved rearward, and the low-speed rotation shaft 23 penetrating the upper arm 26 is moved to the rearmost end of the guide hole 21b. Further, the lower arm 25 rotates backward with the support shaft 24 as a rotation axis in accordance with the movement of the low-speed rotation shaft 23.

  Accordingly, the inter-axis distance between the low-speed rotary shaft 23 and the high-speed rotary shaft 22 is the shortest, and the rotary blade 23a, the large-diameter rotary blade 22a, and the small-diameter rotary blade 22b are each involved in the waste cutting. Therefore, the waste thrown into the cutting case 21 is cut into a length L1, that is, a short dimension in FIG. 2, and is discharged from the lower opening of the cutting case 21 toward the field. In this state, even if a force is applied to increase the distance between the low-speed rotary shaft 23 and the high-speed rotary shaft 22 during the cutting operation, the positioning cam 51 has the outer peripheral portion 51f abutting against the positioning pin 52c, and the locking hole 51c. Is in contact with the positioning pin 52b, the lower arm 25 and the upper arm 26 supporting the positioning cam 51 are not rotated, and the low-speed rotating shaft 23 can be maintained at the short cutting position.

  Next, when switching from the short cutting position of FIG. 6 to the long cutting position of FIG. 7, the motor is driven by operating the changeover switch, and the switching operation input shaft 41 of the Geneva mechanism 40 is rotated clockwise. 1 turn. Then, as shown in FIG. 7, the index pin 45a connected to the second arm 54 moves to the upper center. By this movement, the second arm 54 connected to the index pin 45a moves forward. As the second arm 54 moves forward, the first arm 53 connected to the second arm 54 rotates forward about an arm shaft 53b that is a fixed fulcrum. By this rotation, the engaging pin 51e penetrating through the long hole 53a of the first arm 53 is pushed by the first arm 53 and moves forward. By the forward movement of the engagement pin 51e, the positioning cam 51 rotates about the arm shaft 27 and is moved forward as shown in FIG. 7 or FIG. 5 (b). At this time, both front and rear sides of the outer peripheral lower portion 51g of the positioning cam 51 abut against the positioning pins 52c and 52a. At the same time, the locking hole 51c slides on the outer peripheral portion of the positioning pin 52b, the locking relationship between the positioning pin 52b and the locking hole 51c is released, and the locking hole 51b is positioned near the positioning pin 52b. As the positioning cam 51 moves forward, the arm shaft 27 fixed to the positioning cam 51 moves to the front and rear halfway of the cam guide hole 21c. Then, the upper arm 26 connected to the arm shaft 27 moves forward, and the low-speed rotating shaft 23 penetrating the upper arm 26 moves to the front and rear middle portions of the guide hole 21b. Further, the lower arm 25 rotates forward with the support shaft 24 as a rotation axis in accordance with the movement of the low-speed rotation shaft 23.

  Therefore, the inter-axis distance between the low-speed rotating shaft 23 and the high-speed rotating shaft 22 is longer than the above-described short excision, and only the rotary blade 23a and the large-diameter rotary blade 22a are involved in the excavation cutting. Therefore, the waste thrown into the cutting case 21 is cut to the length of L2 in FIG. 2, that is, a long size, and discharged from the lower opening of the cutting case 21 toward the field. In this state, even when a force is applied to increase the distance between the low-speed rotary shaft 23 and the high-speed rotary shaft 22 during the cutting operation, the positioning cam 51 is in contact with the positioning pins 52c and 52a on both the front and rear sides of the outer peripheral lower portion 51g. Therefore, the lower arm 25 and the upper arm 26 that support the positioning cam 51 are not rotated, and the low-speed rotating shaft 23 can be maintained at the long cutting position.

  Next, when switching from the state of the long cut position of FIG. 7 to the dripping position of FIG. 8, the motor is driven by operating the switch, and the switching operation input shaft 41 of the Geneva mechanism 40 is rotated clockwise. When further rotated, as shown in FIG. 8, the index pin 45a connected to the second arm 54 moves downward and forward. Accordingly, the second arm 54 connected to the index pin 45a moves downward and forward. As the second arm 54 moves forward and downward, the first arm 53 rotates forward about the arm shaft 53b. Then, the engagement pin 51e moves forward by the rotation of the first arm 53, and as shown in FIG. 8 or FIG. 5C, the positioning cam 51 moves forward via the engagement pin 51e. The positioning cam 51 rotates around the arm shaft 27. At that time, the outer peripheral lower portion 51g of the positioning cam 51 leaves the outer peripheral portion of the positioning pin 52c and contacts the outer peripheral portion 51h with the positioning pin 52a. At the same time, the outer peripheral portion of the positioning pin 52b slides from the locking hole 51b to the locking hole 51a. Therefore, the arm shaft 27 fixed to the positioning cam 51 moves to the foremost end of the cam guide hole 21c. Then, the upper arm 26 connected to the arm shaft 27 rotates forward, and the low speed rotating shaft 23 passing through the upper arm 26 moves to the foremost end of the guide hole 21b. Further, the lower arm 25 rotates forward with the support shaft 24 as a rotation axis in accordance with the movement of the low-speed rotation shaft 23.

  Therefore, the inter-axis distance between the low-speed rotary shaft 23 and the high-speed rotary shaft 22 is the longest, and the rotary blade 23a, the large-diameter rotary blade 22a, and the small-diameter rotary blade 22b are not involved in the excision cutting. Therefore, even if waste is put into the cutting case 21, it is discharged toward the farm field from the opening at the lower part of the cutting case 21 without being cut. Therefore, the waste discharged through the cutting case 21 is less affected by the wind, and the discharge posture of the waste is stabilized. In this state, even if a force is applied to increase the distance between the low-speed rotary shaft 23 and the high-speed rotary shaft 22 during the operation, the positioning cam 51 is in contact with the positioning pin 52a and the positioning pin 52b is engaged. Since it is located in the stop hole 51a, the lower arm 25 and the upper arm 26 that support the positioning cam 51 are not rotated, and the low-speed rotating shaft 23 can be maintained in the dripping position.

  As described above, the high-speed rotating shaft 22 in which the plurality of large-diameter rotary blades 22a and the small-diameter rotary blades 22b are alternately fixed at predetermined intervals, and the plurality of rotary blades 23a are fixed at predetermined intervals. A low-speed rotating shaft 23 disposed so as to be close to or away from the high-speed rotating shaft 22; and a switching mechanism 30 capable of switching and fixing the low-speed rotating shaft 23 to the close position or the separated position with respect to the high-speed rotating shaft 22. In the squeezing and cutting apparatus 20 provided, the switching mechanism 30 includes a Geneva mechanism 40 that performs intermittent rotational motion, and a connecting mechanism 50 that connects the Geneva mechanism 40 and the low-speed rotation shaft 23, and the low-speed rotation shaft 23. The position can be switched. With this configuration, the position of the low-speed rotation shaft 23 can be easily switched by the intermittent rotation motion of the Geneva mechanism 40. Further, the rotational movement of the Geneva mechanism 40 is easily controlled electrically, and the position of the low-speed rotating shaft 23 can be easily switched.

  The connecting mechanism 50 rotates by being connected to the positioning cam 51 that supports the low-speed rotating shaft 23, positioning pins 52a, 52b, and 52c for holding the positioning cam 51 in a predetermined position, and the positioning cam 51. And a second arm 54 for connecting the first arm 53 and the Geneva mechanism 40 to each other. By comprising in this way, the low speed rotating shaft 23 can be reliably hold | maintained in a switching position.

  The low-speed rotating shaft 23 is configured to be switchable in three stages: a short cutting position, a long cutting position, and a dripping position. With this configuration, the waste can be discharged in three states: a long cut, a short cut, and a run-off, and it can be cut or discharged as it is according to the purpose of use of the discharged waste. It becomes possible to release the soot. In particular, since the waste passes through the waste cutting device 20 when the waste flows down, the influence of the wind is small and the discharge posture of the waste is stabilized.

  The Geneva mechanism 40 has a switching operation input shaft 41, a cam 43 fixed on the input shaft, a disc 44 that contacts the cam 43, and projects on the disc 44 at a predetermined interval. Indexing pins 45a and 45b are provided, and the cam 43 is formed with a reverse rotation preventing recess 43c. With this configuration, even if the switching operation input shaft 41 is reversely rotated by mistake, the reverse rotation is prevented by the reverse rotation preventing recess 43c, and the Geneva mechanism 40 and the coupling mechanism 50 are not damaged.

DESCRIPTION OF SYMBOLS 20 Waste cutting device 22 High speed rotary shaft 22a Large diameter rotary blade 22b Small diameter rotary blade 23 Low speed rotary shaft 23a Rotary blade 30 Switching mechanism 40 Geneva mechanism 50 Connection mechanism

Claims (3)

A high-speed rotary shaft in which a plurality of large-diameter rotary blades and small-diameter rotary blades are alternately fixed at predetermined intervals, and a plurality of rotary blades are fixed at predetermined intervals, and are close to or separated from the high-speed rotary shaft. In the waste cutting apparatus comprising: a low-speed rotating shaft that can be arranged; and a switching mechanism that can switch and fix the low-speed rotating shaft to a close position or a separated position with respect to the high-speed rotating shaft. A geneva mechanism that performs a rotational motion; and a coupling mechanism that couples the geneva mechanism and the low-speed rotation shaft, the position of the low-speed rotation shaft being switchable, and the coupling mechanism includes a positioning cam that supports the low-speed rotation shaft; A plurality of positioning pins for holding the positioning cam at a predetermined position; a first arm for connecting and rotating with the positioning cam; and a second arm for connecting the first arm and the Geneva mechanism; Straw Discharge cutting device, characterized in that it comprises. 2. The reject cutting apparatus according to claim 1, wherein the low-speed rotation shaft is configured to be switchable in three stages of a short cutting position, a long cutting position, and a dripping position by the plurality of positioning pins. Characteristic exclusion cutting device. 3. The exclusion cutting apparatus according to claim 1 or 2, wherein the Geneva mechanism includes a switching operation input shaft, a cam fixed on the input shaft, a disk that contacts the cam, and the circle. An exclusion cutting apparatus comprising: an indexing pin projecting at a predetermined interval on a plate; and a recess for preventing reverse rotation is formed in the cam .

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