JP5129596B2 - Exhaust cutting device - Google Patents

Description

  The present invention relates to a waste cutting device that can cut waste by feeding waste from a waste inlet into the inside. More specifically, the present invention relates to an opening / closing mechanism for a switching cover that enables opening / closing of the discharge opening.

  Conventionally, a switching cover is pivotally supported in a cutting case that houses a cutting blade and has a discharge insertion port that opens to one side, and the switching cover is pivoted using a switching cover opening / closing mechanism. By switching to the cutting position, the waste input port is opened, the waste material is fed into the cutting case from the waste input port for cutting, and by switching to the non-cutting position, the waste input port is opened. 2. Description of the Related Art Combined waste cutting devices are known that are covered with a switching cover and closed so that the waste is not fed into the cutting case and cut.

  In such a waste cutting apparatus, the switching cover is further rotated from the cutting position so that the switching cover can be turned to a maintenance position where the waste opening can be completely opened upward. Thereby, by switching the rotation position of the switching cover to the maintenance position, when the clogging of the waste occurs in the cutting case, it is removed or the inspection in the cutting case is periodically performed. It was possible to perform maintenance such as.

  When the switching cover is rotated to the maintenance position, when the switching cover opening / closing mechanism is constituted by a link mechanism, for example, when the switching cover is further rotated than the cutting position, the switching cover opening / closing mechanism Interference of the constituent members occurs. Therefore, in this configuration, in order to switch the rotation position of the switching cover to the maintenance position, it is necessary to release the connection between the link mechanism and the switching cover, resulting in a problem that the number of operations during maintenance increases.

As one of means for solving the above problems, a technique described in Patent Document 1 is disclosed. In this technique, a buffer mechanism such as a long hole is provided in a part of a switching cover opening / closing mechanism that rotates the switching cover, and the movable range of the switching cover opening / closing mechanism is expanded by operating the buffer mechanism. Accordingly, the switching cover can be rotated from the open position to the maintenance position without performing an operation of releasing the connection between the switching cover and the switching cover opening / closing mechanism.
Japanese Patent Application Laid-Open No. 11-168953

  However, in the technique of Patent Document 1 described above, the switching cover opening / closing mechanism requires the buffer mechanism, a mechanism for controlling the buffer mechanism so as not to operate when the switching cover is not rotated from the open position, and the like. Therefore, there is a problem that the structure related to the switching cover opening / closing mechanism becomes complicated and the number of parts increases.

  The present invention has been made in view of the above problems, and an object thereof is to provide a waste cutting apparatus having a simple structure as the switching cover opening / closing mechanism.

According to claim 1, whether or not to send waste by providing a switching cover (31) at the waste outlet (21b) and opening and closing the switching cover (31) by a switching cover opening / closing mechanism (30). In the waste cutting device (5) capable of switching between these, the switching cover opening / closing mechanism (30) includes a fulcrum shaft (32) fixed to the switching cover (31) and one of the fulcrum shafts (32). A rotating arm (33) fixed to the side, a biasing spring (36) with one end hooked to the rotating arm (33), and one end hooked to the rotating arm (33). A buffer spring (37), a link wire (38) connected at one end to the other end of the buffer spring (37), and an operating tool (39) connected to the other end of the link wire (38). comprising, the fulcrum shaft (32), the side of the cutting casing of the exhaust straw cutting device (5) Is supported on (21a), the switching cover (31) via the pivot arm (33) is biased in the direction of opening by the biasing spring (36), one end of the biasing spring (36) The latching hole (34) of the pivoting arm (33) to be latched is formed in a triangular shape, and the corner of the latching hole (34) is located closest to the fulcrum shaft (32). The first corner portion (34a) has a straight line with the first corner portion (34a), the fulcrum shaft (32), and a latching portion (5b) for latching the other end of the biasing spring. The distance (L1) from the latching portion to the first corner portion (34a) is the distance (L2) from the latching position of the latching portion to one end of the urging spring having a free length. ) Is arranged at a position larger than .

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

  Since it comprised like Claim 1, it becomes possible to make a switching cover opening-and-closing mechanism into a simple structure, and can aim at reduction of a number of parts.

  Since it comprised like Claim 2, it can rotate a switching cover smoothly, preventing the interference of the latching | locking part of the rotation arm with respect to an urging | biasing spring.

  Below, combine 1 which is one embodiment of a combine concerning the present invention is explained with reference to drawings.

  First, a schematic configuration of the combine 1 will be described with reference to FIG. The combine 1 harvests rice, wheat and the like, and more specifically, harvests cereal grains from the field while running through the field and threshes the grain.

  The combine 1 of this embodiment is a self-decomposing combine that threshes only the tip portion with a grain of the harvested cereal.

  As shown in FIG. 1, the combine 1 mainly includes a reaping device 2, a threshing device 3, a sorting device 4, and a waste treatment device 5.

  As shown in FIG. 1, the reaping device 2 is disposed at the front portion of the combine 1. The reaping device 2 includes a pulling device, a lower conveying device, a tip conveying device, a cutting blade, and the like, and harvests the culm from the field and passes the cereal to the threshing device 3.

  As shown in FIG. 1, the threshing device 3 is disposed behind the reaping device 2. The threshing device 3 mainly includes a feed chain 3a, a handling cylinder 3b, and the like. The threshing device 3 threshs the grain from the culm by rotating the barrel 3b while conveying the cereal received from the reaping device 2 from the front side to the rear side with the feed chain 3a.

  As shown in FIG. 1, the sorting device 4 is disposed below the threshing device 3. The sorting device 4 sorts swarf, dust and the like mixed in the grain threshed by the threshing device 3 by wind sorting or rocking sorting.

  As shown in FIG. 1, the waste treatment device 5 is disposed behind the threshing device 3. The waste treatment device 5 carries the predetermined processing such as conveying the straw after threshing (hereinafter simply referred to as “exhaust”) received from the feed chain 3a through the waste chain 5a and cutting the waste. Apply.

  As shown in FIG. 1, an operation unit 9 for an operator to operate the combine 1 is disposed in front of the Glen tank 7.

  In the combine 1 configured as described above, the refined particles separated from the sawdust and the like by the sorting device 4 are carried into a Glen tank 7 provided on the right side of the threshing device 3 via the cerealing cylinder 6 and stored. Is done. A discharge auger 8 is connected to the Glen tank 7 in communication. By operating the discharge auger 8, the fine particles stored in the Glen tank 7 are carried out of the Glen tank 7 through the discharge auger 8.

  Next, with reference to FIG. 2, the exclusion cutting device 20 which is an embodiment of the rejection cutting device according to the present invention will be described in detail.

  The waste cutting device 20 is provided as one of the waste treatment devices 5, and cuts the waste conveyed by the waste chain 5a into a predetermined length. As shown in FIG. 2, the waste cutting apparatus 20 includes a cutting case 21, a first rotating shaft 22, a first rotating blade 22a, a second rotating shaft 23, a second rotating blade 23a, a switching cover opening / closing mechanism 30, and a switching cover. 31 grade.

  The cutting case 21 is disposed below the waste chain 5a. The cutting case 21 is configured in a box shape, and the first rotary blade 22a and the second rotary blade 23a are accommodated therein, and the upper side plate 21a is provided with a waste outlet 21b that opens upward. In the cutting case 21, the first rotating shaft 22 and the second rotating shaft 23 are horizontally mounted between the left and right side plates 21 c and 21 c in the horizontal direction, and the second rotating shaft 23 is located in front of the first rotating shaft 22. It arrange | positions so that it may be located in.

  A plurality of disk-shaped first rotary blades 22a, 22a,... Are fixed to the first rotary shaft 22 with a predetermined interval. A plurality of disk-shaped second rotary blades 23a, 23a,... Are fixed to the second rotary shaft 23 at predetermined intervals. The second rotary blades 23a, 23a,... On the second rotary shaft 23 are arranged so as to partially overlap the first rotary blades 22a, 22a,.

  Power can be transmitted from the engine of the combine 1 to the first rotating shaft 22 and the second rotating shaft 23 via a transmission mechanism. By transmitting power to the first rotary shaft 22 and the second rotary shaft 23 in this way, the first rotary blades 22a, 22a... And the second rotary blades 23a, 23a,. .. and can be rotated. The rotation speed of the second rotation shaft 23 is set to be lower than the rotation speed of the first rotation shaft 22.

  With this configuration, in the waste cutting apparatus 20, when the waste inlet 21b of the cutting case 21 is covered and closed by the switching cover 31, the waste that has been conveyed by the waste chain 5a. However, the waste cutting port 21b is not fed into the cutting case 21 and the waste cutting process is not performed.

  On the other hand, when the discharge input port 21b of the cutting case 21 is opened without being covered by the switching cover 31, the discharge is fed into the cutting case 21 from the discharge input port 21b, and the first rotary shaft 22 The first rotary blade 22a and the second rotary blade 23a on the second rotary shaft 23 are cut to a predetermined cutting length. And the waste after cutting is discharged | emitted from the lower part of the cutting case 21 toward a farm field.

  A switching cover opening / closing mechanism 30 which is an embodiment of the switching cover opening / closing mechanism according to the present invention will be described with reference to FIGS.

  As shown in FIG. 2, the switching cover opening / closing mechanism 30 changes the rotation position of the switching cover 31 to any one of the non-cutting position P1, the cutting position P2, and the maintenance position P3. The open / closed state of the cutting case 21 is switchable, and is disposed mainly on the left and right sides of the cutting case 21, or on the right side in the present embodiment. The switching cover opening / closing mechanism 30 includes a switching cover 31, a fulcrum shaft 32, a rotating arm 33, a biasing spring 36, a buffer spring 37, a linkage wire 38, an operation tool 39, and the like.

  Here, of the rotation positions of the switching cover 31, the non-cutting position P1 is, as shown in FIG. 2, covering the waste discharging inlet 21b with the switching cover 31 and cutting the waste from the waste discharging inlet 21b. This is a rotation position at which feeding into the case 21 is impossible. As shown in FIG. 4, the cutting position P <b> 2 is a rotational position that allows the waste to be fed into the cutting case 21 from the waste inlet 21 b without covering the waste outlet 21 b with the switching cover 31. .

  In addition, the maintenance position P3 is, as shown in FIG. 5, compared with the case where the rotation position of the switching cover 31 is set to the cutting position P2, and opens the evacuation insertion port 21b further and completely opens upward. Then, when the exhaust case is clogged in the cutting case 21, it is possible to remove it, or to perform maintenance such as regularly inspecting the cutting case 21. It is.

  The fulcrum shaft 32 is located in the vicinity of the rear end edge of the discharge port 21b, is horizontally mounted between the left and right side plates 21c and 21c, and is supported by the side plates 21c and 21c so as to be rotatable on the left and right sides. Is done. The fulcrum shaft 32 protrudes outward from the right side plate 21c, and a rotating arm 33 is fixed to the protruding end portion.

  A rear end portion of the switching cover 31 is fixed to the center portion of the fulcrum shaft 32, and the switching cover 31 is rotatably supported by the cutting case 21 by the fulcrum shaft 32. The switching cover 31 is rotated about the fulcrum shaft 32 and is held at any one of the rotation positions of the non-cutting position P1, the cutting position P2, and the maintenance position P3 so as to switch the open / closed state of the discharge input port 21b. .

  The rotating arm 33 is constituted by a plate-like member having a substantially triangular shape in a side view having a first vertex portion 33a, a second vertex portion 33b, and a third vertex portion 33c. The rotating arm 33 is fixed to the protruding end portion of the fulcrum shaft 32 at the first vertex 33a, and is supported by the cutting case 21 so as to be rotatable by the fulcrum shaft 32. In this way, the switching cover 31 and the rotating arm 33 are interlocked and can be rotated integrally around the fulcrum shaft 32.

  The rotating arm 33 extends in the front-rear direction in parallel with the right side plate 21c of the cutting case 21, and as shown in FIG. 2, in the state where the switching cover 31 is at the non-cutting position P1, as described above, the fulcrum shaft 32 is provided. The first vertex 33a fixed to the rear is located at the rear, the second vertex 33b is located at the front lower part, and the third vertex 33c is located at the front upper part. The second vertex 33b is provided with a first latching portion, and the third vertex 33c is provided with a second latching portion.

  The first latching portion is configured by projecting a latching member 35 made of a pin-like member to the right side of the rotating arm 33 at the second apex portion 33 b. On the other hand, a 2nd latching | locking part is provided and provided in the 3rd vertex part 33c so that the latching hole 34 may be penetrated in the left-right direction. The first hooking portion can also be configured by providing a hole in the second vertex portion 33b so as to penetrate in the left-right direction.

  The urging spring 36 is interposed between the rotating arm 33 and the latching portion 5 b disposed above the rotating arm 33. One end of the urging spring 36 is latched in the retaining hole 34 of the rotating arm 33, and the other end of the urging spring 36 is a pin-like member fixed to the combine 1 near the fulcrum shaft 32. It latches on the latching | locking part 5b which consists of. The urging spring 36 urges the turning arm 33 to turn in the direction of the arrow A about the fulcrum shaft 32, and as a result, the switching cover 31 turns in the direction to open the discharge port 21b. Be energized.

  The buffer spring 37 is a part of the pivot arm 33 and a link wire 38 that is a link member disposed below the pivot arm 33, that is, in a vertically opposite direction with respect to the biasing spring 36 and the pivot arm 33. It is inserted between. One end of the buffer spring 37 is hooked on a pin-shaped hook member 35 of the rotating arm 33, and the other end of the buffer spring 37 is supported by the right side plate 21 c of the cutting case 21 near the fulcrum shaft 32. The connecting wire 38 is hooked to one end extending upward. The buffer spring 37 biases the rotating arm 33 so as to rotate in the direction of arrow B about the fulcrum shaft 32, and as a result, the switching cover 31 is attached so as to rotate in the direction of closing the discharge inlet 21b. Be forced.

  The operation tool 39 is disposed at an arbitrary position such as the operation unit 9 of the combine 1 and is interlocked and connected to the rotary arm 33 via the buffer spring 37 and the linkage wire 38. For example, the operation tool 39 is configured as a lever that can be rotated, and one end of the operation tool 39 is connected to the other end of the linkage wire 38. By the rotation operation of the operation tool 39, the link wire 38 can be pushed and pulled, and the rotation arm 33 connected to the link wire 38 via the buffer spring 37 is rotated accordingly.

  As shown in FIG. 3, in the rotating arm 33, the retaining hole 34 is a polygonal hole having a first corner portion 34 a, a second corner portion 34 b, and a third triangle portion 34 c, here a substantially triangular shape. Of holes. As shown in FIG. 2, when the switching cover 31 is in the non-cutting position P1, the retaining hole 34 has the first corner 34a located at the rear and the second corner 34b located at the front lower part. The third triangular portion 34c is arranged so as to be located at the front upper part. That is, the first corner portion 34a is positioned closest to the fulcrum shaft 32, the second corner portion 34b is positioned on the pin-shaped hooking member 35 side, and the third triangular portion 34c is the third vertex portion 33c. It arrange | positions so that it may be located in the front end side.

  When the switching cover 31 is turned to the non-cutting position P1 or the cutting position P2, the turning arm 33 is in a turning state in which the hooking hole 34 is positioned in front of the fulcrum shaft 32, and the hooking hole One end portion of the biasing spring 36 is hooked on the 34th triangular portion 34c of 34. When the switching cover 31 is turned to the maintenance position P3, the turning arm 33 is in a turning state in which the hooking hole 34 is located behind the fulcrum shaft 32, and the second corner of the hooking hole 34 is set. One end of the biasing spring 36 is hooked on the portion 34b.

  Further, in the process in which the switching cover 31 is rotated from the cutting position P2 to the maintenance position P3 or from the maintenance position P3 to the cutting position P2, the rotating arm 33 positions the retaining hole 34 directly above the fulcrum shaft 32. When the rotation state is closest to the latching portion 5b, the fulcrum shaft 32, the first corner portion 34a of the latching hole 34, and the latching portion 5b are arranged in a straight line.

  Here, as shown in FIG. 3, the first corner portion 34a of the latching hole 34 includes a pivot point 32 of the pivoting arm 33, a first corner portion 34a of the latching hole 34, and a latching portion 5b. And the pivot arm as one corner of the latching hole 34 so that the length L1 between the latching part 5b and the latching part 5b is larger than the free length of the biasing spring 36. 33.

  Therefore, even when the first corner portion 34a of the latching hole 34 and the latching portion 5b are closest when the pivoting arm 33 is pivoted, the other end portion of the biasing spring 36 is the latching portion. In the state of being hooked by 5b, one end of the biasing spring 36 is contracted by being positioned on the first corner 34a side without being in pressure contact with the edge of the hooking hole 34 in the hooking hole 34. And kept free.

  Thus, with the biasing spring 36 remaining free, the first corner portion 34a is used as the movement path in the retaining hole 34, and one end portion is extended from the third triangular portion 34c to the second corner portion 34b, or the second corner portion. It is set as the structure which can be moved from the part 34b to the 3rd triangular part 34c, and can be latched in one of these. Therefore, when the rotating arm 33 is rotated, the biasing spring 36 is contracted to the free length, and is prevented from being bent or bent by the contact with the rotating arm 33 and coming off from the latching portion 5b. Is done.

  In such a configuration, when the operation tool 39 is rotated to one side while the switching cover 31 is held at the non-cutting position P1 and the evacuation insertion port 21b is closed, the rotating arm 33 is moved. It is rotated upward by the urging force of the urging spring 36, and the switching cover 31 is rotated in the direction to open the discharge input port 21 b with this rotation. Then, when the operation tool 39 is turned to a predetermined operation position, the switching cover 31 is held at the cutting position P2, and the waste outlet 21b is opened.

  On the other hand, when the operation tool 39 is turned from one side to the other side while the switching cover 31 is held at the cutting position P2 and the discharge port 21b is opened, the turning arm 33 is biased. The spring 36 is rotated downward against the urging force of the spring 36, and with this rotation, the switching cover 31 is rotated in a direction to close the discharge inlet 21b. Then, when the operation tool 39 is rotated to a predetermined operation position, the switching cover 31 is held at the non-cutting position P1, and the waste outlet 21b is closed.

  The spring force of the buffer spring 37 is set larger than the spring force of the biasing spring 36, and the switch cover 31 is held in the non-cutting position P1, the cutting position P2, and the maintenance position P3 by the buffer spring 37. By urging the rotating arm 33 to rotate downward, the switching cover 31 is prevented from rattling. Further, even when clogging occurs in the discharge input port 21b, the buffer wire 37 prevents the linkage wire 38 and the like from being overloaded.

  As shown in FIG. 5, in a state where the switching cover 31 is held at the cutting position P2 and the evacuation port 21b is opened, the switching cover 31 is directly gripped by human hands without using the operation tool 39 and further discharged. When it is turned in the direction to open the spear insertion port 21b, the turning arm 33 is turned in the A2 direction along with this turning. Then, the urging force of the urging spring 36, the weight of the switching cover 31 and the urging force of the buffer spring 37 are balanced, so that the switching cover 31 is held at the maintenance position P3, and the waste outlet 21b is moved upward. Fully open towards.

  On the contrary, in the state where the switching cover 31 is at the maintenance position P3 and the evacuation input port 21b is completely opened upward, the switching cover 31 is directly gripped by a hand and rotated in the direction to close the evacuation input port 21b. With this rotation, the rotation arm 33 is rotated in the arrow B2 direction. Then, the urging force of the urging spring 36, the weight of the switching cover 31 and the urging force of the buffer spring 37 are balanced, so that the switching cover 31 is held at the cutting position P2, and the waste outlet 21b first. It is opened smaller than that.

  When the switching cover 31 is thus rotated between the cutting position P2 and the maintenance position P3, the rotation arm 33 that is rotated along with the switching cover 31 is a latching member that serves as a first latching portion. 35 and the latching hole 34 used as the second latching part once approach the latching part 5b, and then are separated from the latching part 5b again. At this time, the latching member 35 is moved so as to pull the link wire 38. Since the buffer spring 37 interposed therebetween is extended, the other end of the buffer spring 37 and one end of the link wire 38 are connected. The connection position of is not substantially changed. That is, the rotation of the rotation arm 33 is not restricted by the linkage wire 38.

  Even if the latching hole 34 is closest to the latching portion 5b, as described above, the length L1 between the latching portion 5b and the first corner portion 34a, which is the latching position of the biasing spring 36. Is larger than the length L2 between the latching position (the other end portion) of the biasing spring 36 and the one end portion located in the latching hole 34 of the biasing spring 36 having a free length. Since 36 interferes with the rotating arm 33 at one end portion and is bent or bent, the other end portion is not detached from the latching portion 5b.

  Therefore, in the switching cover opening / closing mechanism 30, the switching cover 31 is removed without releasing the connection between the rotating arm 33 and the linking wire 38 or removing the biasing spring 36 from the rotating arm 33 or the latching portion 5b. It is possible to smoothly rotate to the maintenance position P3. Therefore, while the switching cover opening / closing mechanism 30 is configured with a simple structure, the operation of the switching cover opening / closing mechanism 30 accompanying opening / closing of the switching cover 31 can be omitted, and the number of operations during maintenance can be reduced. Further, the switching cover opening / closing mechanism 30 can be configured with a reduced number of parts, and can be manufactured at low cost.

The side view of a combine provided with the waste cutting device which concerns on this invention. The side view which shows the structure of a switching cover opening / closing mechanism. The side view which shows the state from which an urging | biasing spring becomes free length. The figure which shows the structure of the opening-closing mechanism in case a switching cover becomes an open position. The figure which shows the structure of the opening-and-closing mechanism in case a switching cover serves as a maintenance position.

DESCRIPTION OF SYMBOLS 1 Combine 5 Discharge processing apparatus 5b Hanging part 20 Discharge cutting apparatus 21a Side plate of cutting case 21b Discharge opening 30 Switching cover opening / closing mechanism 31 Switching cover 32 Supporting shaft 33 Rotating arm 30 Switching cover opening / closing mechanism 34 Locking hole 34a, 34b, 34c Corner 35 Locking member 36 Biasing spring 37 Buffer spring 38 Linking wire 39 Operating tool

Claims (1)

A switching cover (31) is provided in the waste discharge port (21b), and the switching cover (31) is opened and closed by a switching cover opening / closing mechanism (30), so that whether or not waste is to be fed can be switched. In the scissor cutting device (5), the switching cover opening / closing mechanism (30) is fixed to a fulcrum shaft (32) fixed to the switching cover (31) and one side of the fulcrum shaft (32). A rotating arm (33), a biasing spring (36) with one end hooked on the rotating arm (33), and a buffer spring (37) with one end hooked on the rotating arm (33) A linking wire (38) having one end connected to the other end of the buffer spring (37), and an operating tool (39) connected to the other end of the linking wire (38). (32), the support of the side plate of the cutting casing of the exhaust straw cutting device (5) (21a) , The switching cover (31) via the pivot arm (33) is biased in the direction of opening by the biasing spring (36), the times in which one end of the biasing spring (36) is hooked The latching hole (34) of the moving arm (33) is formed in a triangular shape, and of the corners of the latching hole (34), the first corner (31) located closest to the fulcrum shaft (32) ( 34a) is a positional relationship in which the first corner portion (34a), the fulcrum shaft (32), and the latching portion (5b) that latches the other end of the biasing spring are in a straight line. Position at which the distance (L1) from the latching portion to the first corner (34a) is larger than the distance (L2) from the latching position of the latching portion to one end of the urging spring having a free length A waste cutting device characterized by being arranged in

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