JP2011177075A - Combine harvester - Google Patents

Abstract

A state in which the height of the secondary cutting device can be adjusted separately from the main cutting device while the structure is simplified and the cost is reduced, and the secondary cutting is performed in conjunction with the height change of the main cutting device. It is ensured that the device is switched to a state in which the posture is changed.
A main cutting device (9) is supported by a cutting and conveying device (3), and a sub cutting device (14) is supported by elevating frames (13A and 13C) mounted on a traveling machine body (2) so as to be swingable up and down. The linkage means B capable of switching the linkage state of the lifting / lowering operation of the device 14 is engaged and guided by the guide member 51 formed with a long hole toward the sub-cutting device 14 and movably along the long hole. Linked operation state in which guided body 52 is provided on the cutting and conveying device 3 side to restrict movement of guided body 52 along the long hole, and link release operation state in which movement of guided body 52 along the long hole is allowed. The guide member 51 includes a switching operation body 53 that can be switched between.
[Selection] Figure 1

Description

  The present invention relates to a combine provided with a main cutting device that cuts a planted stalk and a secondary cutting device that cuts the planted stalk at a position lower than the main cutting device.

  As described above, the stalk has two types of cutting devices: a main cutting device that cuts the upper part of the planted stalk and a secondary cutting device that cuts the planted stalk at a position lower than the main cutting device. In order to put only the granulation part of the straw into the threshing device, the granulation part is cut by the main cutting device, and the stem cutting part below the granulation part is discharged to the field without being thrown into the threshing device. This is to cut the stock portion.

As this type of combine, one having the following configuration is conventionally known.
That is, the secondary cutting device is attached to the cutting unit provided with the main cutting device, and the cutting unit is controlled to move up and down in synchronization with the cutting height adjustment operation of the main cutting device while adjusting the cutting height of the secondary cutting device. When the entire ground level is equal to or higher than a predetermined height, the auxiliary cutting device is automatically raised to the storage position (see, for example, Patent Document 1).

  In addition to the explanation, in the above configuration, since the auxiliary cutting device is attached to the cutting portion provided with the main cutting device, when adjusting the cutting height in order to keep the cutting height in the main cutting device properly, In conjunction with this, the height of the cutting action position of the auxiliary cutting device also changes. Therefore, in order to keep the cutting height by the secondary cutting device properly, the potentiometer that detects the swinging operation of the entire cutting unit, the potentiometer that detects the relative height of the secondary cutting device with respect to the cutting unit, and the detection values of both potentiometers If the ground height of the cutting part is less than a predetermined height using a hydraulic cylinder that is operated by the output from the control apparatus, the ground height of the cutting part is calculated. Regardless of the difference, the cutting height of the secondary cutting device is maintained at a constant value, and when the ground height of the cutting part is equal to or higher than the predetermined height, the secondary cutting device is automatically raised to the storage position. The height of the cutting device is adjusted.

  By the way, the state in which the cutting height of the secondary cutting device is maintained at a constant value regardless of the difference in height between the cutting parts as described above is independent of the secondary cutting device regardless of the height position change of the main cutting device. This corresponds to the state in which the cutting device can be raised and lowered, and when the ground height of the cutting part is equal to or higher than the predetermined height, the state in which the secondary cutting device is automatically raised to the storage position is the height of the main cutting device. This corresponds to a state in which the posture of the auxiliary cutting device is changed in conjunction with the position change.

JP-A-7-147828

  According to the above conventional configuration, although it is useful in that the cutting height of the auxiliary cutting device can be automatically adjusted regardless of the cutting height change by the main cutting device, a plurality of potentiometers and various control devices, and Since a control actuator is required, the structure for controlling the adjustment operation of the sub-cutting device is complicated, and the number of expensive parts is large, so that cost reduction is difficult. Also, because the height of the secondary cutting device is adjusted by controlling the relative position with the main cutting device, depending on the uneven conditions of the actual farm scene, etc. There is also.

  The purpose of the present invention is to combine the main cutting device and the auxiliary cutting device so that the upper and lower sides of the planted stalk can be cut, while simplifying the structure and reducing the cost, the main cutting device Surely switch between the state in which the sub-cutting device can be moved up and down independently regardless of the height position change and the state in which the position of the sub-cutting device is changed in conjunction with the change in the height position of the main cutting device. The point is to provide a combine that can be performed.

  The combine according to the present invention is provided with a main cutting device that cuts the planted stalk and a secondary cutting device that cuts the planted stalk at a position lower than the main cutting device. In the characteristic configuration, the main cutting device is supported by a cutting part that is mounted on a traveling machine body so as to be swingable up and down, and the sub-cutting device is supported by a lifting frame that is mounted on the traveling machine body so as to be swingable up and down. Linkage that can be switched between a linkage state in which the sub-cutting device moves up and down in conjunction with the lifting operation of the part and a linkage release state in which the sub-cutting device can be lifted and lowered independently of the lifting operation of the cutting unit Means, and the linkage means includes a guide member in which a guide slot is formed, and a guided body that is movably engaged and guided along the slot. Provided on the cutting part side, the other side is the auxiliary cutting device side An operation state for linkage which is configured to be provided in a state of being provided and which restrains movement of the guided body along the long hole and an operation state for release of linkage which allows movement of the guided body along the long hole. A switching operation body that can be switched is provided in the guide member.

According to the first characteristic configuration, instead of selecting a cutting part supported to swing up and down with respect to the traveling machine body as a conventional object to be equipped with the auxiliary cutting device, The sub-cutting device is supported so as to be swingable up and down directly with respect to the traveling machine body using a lifting frame that is swingably mounted. In addition, since the linkage means that can switch the linkage state of the lifting operation of the sub cutting device with respect to the main cutting device is provided, when the linkage means is switched to the linkage releasing state, the sub cutting device is a cutting that is provided with the main cutting device. The sub-cutting device can be raised and lowered independently regardless of the height position change of the main cutting device regardless of the swinging operation of the part.
In this state, even if an operation for changing the cutting height by the main cutting device is performed by the swinging operation of the cutting unit, the state in which the auxiliary cutting device independently sets the ground height regardless of this is obtained. A detection means and a control means for correcting the height change on the side of the auxiliary cutting device accompanying the cutting height change of the main cutting device, such as the conventional structure in which the auxiliary cutting device is supported with respect to the cutting unit, are required. do not do.

  Also, when it is necessary to link the lifting / lowering operation of the sub-cutting device to the lifting / lowering operation of the main cutting device, the linkage means is operated to switch from the linkage release state to the linkage state. The sub-cutting device can also be lifted by following the operation of the main cutting device that is inevitably lifted, and the lifting / lowering operation of the sub-cutting device in accordance with various types of use requires special control means. Can be done without.

  That is, switching between the state in which the secondary cutting device can be moved up and down separately from the change in the height position of the main cutting device and the state in which the posture of the secondary cutting device is changed in conjunction with the change in the height position of the main cutting device. It is necessary to have various sensors for detecting the attitude of the sub-cutting device relative to the machine body and the height to the ground, actuators such as hydraulic cylinders, and control means for controlling the actuators. Instead, the structure can be simplified and the number of parts can be reduced.

  Further, according to the first characteristic configuration, when the switching operation body provided in the guide member is switched to the linkage release operation state, the guided body is allowed to move along the long hole of the guide member. And the guided body are allowed to move relative to the cutting part provided with one of them and the auxiliary cutting device provided with the other, regardless of the height position change of the main cutting device. The sub-cutting device can be moved up and down independently. On the other hand, when the switching operation body provided in the guide member is switched to the linkage operation state, the movement of the guided body along the long hole of the guide member is restricted. The movement is restricted, and the sub-cutting device can also be moved up and down following the lifting and lowering operation of the cutting unit.

  Thus, by switching the switching operation body, it is switched between a state allowing the relative movement between the guided body and the guide member and a state where the relative movement is regulated and moved up and down in conjunction with each other. Although it has a simple configuration, the secondary cutting device can be moved up and down separately from the height position change of the main cutting device, and the posture of the secondary cutting device is changed in conjunction with the height position change of the main cutting device It is possible to surely perform switching to and.

  Therefore, according to the first characteristic configuration, while simplifying the structure and reducing the cost, the state in which the auxiliary cutting device can be raised and lowered separately from the change in the height position of the main cutting device, and the main cutting device Thus, it has become possible to provide a combine that can surely switch the sub-cutting device to a state in which the posture of the sub-cutting device is changed in conjunction with the change in the height position.

  According to a second feature configuration of the present invention, in addition to the first feature configuration, when the switching operation body is switched to the linkage operation state, the cutting portion is moved upward at the linkage setting position in the long hole. The switch operating body is configured to regulate movement of the guided body, and the guided body is moved from the link setting position in a state where the switch operating body is switched to the link operation state. In addition, the switching operation body can be moved backward and disengaged and returned to the linkage operation state so as to allow movement toward the linkage setting position from the state of moving to the lifting operation side of the cutting unit. It is in the point provided in the state where it is energized.

  According to the second characteristic configuration, when the switching operation body is switched to the linkage operation state in a state where the guided body is located at the linkage setting position in the long hole, the guided body accompanying the raising operation of the cutting unit is performed. Movement is restricted by the switching operation body, relative movement between the cutting part and the auxiliary cutting device is restricted, and the auxiliary cutting device can also be raised following the raising operation of the cutting part. it can.

  When the guided body is moved to the ascending operation side of the cutting part from the linkage setting position in the long hole and the switching operation body is switched to the operating state for association, the guided body accompanying the ascending operation of the cutting part will be described. Although it is not possible to regulate the movement of the guide body, if the cutting part is lowered from this state, the guided body is moved from the linkage setting position to the raising operation side of the cutting part. Trying to move toward the linkage setting position. If it does so, it will be pushed and moved by the to-be-guided body, the switching operation body will move backwardly, and the to-be-guided body can move to the link setting position.

  Further, since the switching operation body is urged to return to the linkage operation state, after the guided body moves to the linkage setting position, it automatically returns to the linkage operation state. It will be in the state which controls the movement of the to-be-guided body accompanying the raising operation of a part. In this state, the relative movement between the cutting unit and the auxiliary cutting device is restricted, and the auxiliary cutting device can also be lifted following the raising operation of the cutting unit.

  Therefore, even if the switching body is mistakenly switched to the linkage operation state when the guided body is moved to the raising operation side of the cutting portion from the linkage setting position in the long hole, the cutting portion is lowered. It is possible to automatically return to a state in which movement of the guided body associated with the lifting operation of the cutting unit is restricted simply by operating.

  According to a third characteristic configuration of the present invention, in addition to the first characteristic configuration or the second characteristic configuration, the switching operation body is swingable between the operation state for linkage and the operation state for release of linkage in the guide member. It is supported and is configured to be held by an elastic biasing force in each of the linkage operation state and the linkage release operation state by a toggle spring.

  According to the third characteristic configuration, the switching operation body can be switched between the linkage operation state and the linkage release operation state by swinging the switch operation body, and the switching operation body is switched to the linkage operation state and the linkage release by the toggle spring. Since the position is held by the elastic biasing force in each of the operation states, the vertical position fluctuation that occurs when the switching operation body is cut with the cutting operation regardless of whether the operation state is switched to the linkage operation state or the linkage release operation state. Thus, the position can be accurately held in a state where there is no possibility that the operation state is erroneously switched due to the above.

  According to a fourth characteristic configuration of the present invention, in addition to any one of the first characteristic configuration to the third characteristic configuration, a resin sliding contact guide body having an annular groove-shaped recess is externally fitted to the guided body. The guide body is configured to be engaged and guided to the long hole in a state where the inner edge portion of the long hole of the guide member enters and engages with the concave portion of the sliding contact guide body. is there.

  According to the fourth characteristic configuration, the guided body is movably engaged along the long hole while the inner edge of the long hole of the guide member enters and engages with the annular groove-shaped recess of the resin sliding guide body. You will be guided. Since it is guided by the sliding contact guide made of resin in this way, it is in a state where the inner edge portion of the elongated hole of the guide member enters and engages with the concave portion of the annular groove shape while reducing the generation of noise. The guided body can be moved and guided by the guide member in a state in which it is prevented from coming off.

  According to a fifth feature configuration of the present invention, in addition to any one of the first feature configuration to the fourth feature configuration, the guide member defines an operation limit of movement associated with the raising operation of the cutting portion of the guided body. The restriction tool is provided.

  According to the fifth characteristic configuration, in the state where the switching operation body is switched to the linkage release operation state, the guided body is not restricted by the switching operation body. However, when the guided body moves with the lifting operation of the cutting part, if the guided body moves to the operation limit defined by the restricting tool provided on the guide member, further movement is restricted. Will be.

  Even if the switching operation body is switched to the linkage release operation state, if the cutting part is raised to a set height or higher, the movement of the guided body in the long hole is restricted, and the guided body is When the moving operation is performed in conjunction with the guide member, the auxiliary cutting device is raised in conjunction with the raising operation of the cutting unit.

  As a result, the linkage means is switched to the linkage-released state, the main cutting device is raised so as to cut only the tip of the planted cereal rice cake, and the sub-cutting device is cut off the planted grain rice cake stock. In order to prevent the main cutting device from coming into contact with the ridge without switching the linking means to the linkage state when approaching the heel when the cutting operation is performed in a work mode set to a low position. When the cutting part is greatly raised, the auxiliary cutting device can also be raised in conjunction.

  Therefore, even if the driver forgets to switch the linkage means to the linkage state when approaching the saddle, it is possible to prevent not only the main cutting device but also the secondary cutting device from being damaged by contact with the saddle. It becomes.

  The sixth characteristic configuration of the present invention is that, in addition to the fifth characteristic configuration, the attachment position of the restricting tool with respect to the guide member is configured to be adjustable in the longitudinal direction of the long hole.

  According to the sixth characteristic configuration, by changing the attachment position of the restricting tool with respect to the guide member along the longitudinal direction of the long hole, in the state switched to the operation state for releasing the linkage, it is interlocked with the raising operation of the cutting part. The height difference between the cutting unit and the auxiliary cutting device when switching to the state in which the auxiliary cutting device is raised can be changed, for example, work conditions such as the skill level of the operator and the difference in the height of the field culm It can be changed to an appropriate one according to the difference between the two, making it easy to use.

  According to a seventh characteristic configuration of the present invention, in addition to the fifth characteristic configuration or the sixth characteristic configuration, the guide member is a channel material having a substantially U-shaped cross section having side plate portions on both sides of a central wall surface portion. The long hole is formed in the central wall surface portion, and the restricting tool is provided in a state of penetrating through the through holes formed in the side plate portions on both sides of the guide member, and the switching operation The body is positioned in a state of penetrating through the through holes formed in the side plate portions on both sides of the guide member in the linkage operation state, and is in contact with the edge of the through hole of the guided body. It exists in the point comprised so that the movement along the said long hole may be controlled.

  According to the seventh characteristic configuration, since the guide member is constituted by a channel material having a substantially U-shaped cross section and a long hole is formed in the central wall surface portion, a guided body that engages with the long hole. Is located between the side plate portions on both sides of the channel material having a substantially U-shaped cross section.

  And since a control tool is provided in the state penetrated over the through-hole formed in the side plate part of the both sides of a guide member, it controls in order to control the movement of the to-be-guided body located between a pair of side plate part. Since the force applied to the tool is received by the through-holes formed in each of the pair of side plate portions, the guide member is stable without being swung by receiving the force in a uniform state on the side plate portions on both sides. It can move in conjunction with the guided body in the state.

  Further, the switching operation body is positioned in a state of penetrating through a through hole formed in the side plate portion of the guide member in the linkage operation state, and comes into contact with the edge of the through hole so as to extend the length of the guided body. Movement along the hole will be restricted. That is, since the force applied to the switching operation body to restrict the movement of the guided body located between the pair of side plate portions is received by the through holes formed in each of the pair of side plate portions, the guide member is By receiving the force in a uniform state at the side plate portions on both sides, the guide member can move in conjunction with the guided body in a stable state without any turning.

  In this way, the guide member can move in conjunction with the guided body in a stable state without being twisted in any of the linkage operation state and the linkage release operation state. The interlocking operation can be performed satisfactorily in a state in which deformation or the like hardly occurs.

It is a whole side view of a combine. It is a whole top view of a combine. It is a front view which shows a sub cutting device, an interlocking mechanism, a boarding operation part, and a conveyance mechanism. It is a top view which shows a sub cutting device, an interlocking mechanism, and a conveyance mechanism. It is a left view which shows the drive structure of a left raising / lowering flame | frame and a sub cutting device. It is a left view which shows the biasing means provided between the center side raising / lowering frame and its center side raising / lowering frame, and a traveling body. It is a right view which shows a right raising / lowering flame | frame. It is a top view which shows three raising / lowering frames and a sub cutting device. It is a top view which shows a part of sub cutting device. It is the left view which longitudinally cut the sub cutting device. It is a perspective view which shows a bag. It is a cross-sectional top view of the cover body for raising / lowering frames. It is a vertical front view which shows the eccentric drive unit with respect to a sub cutting device. It is a partially notched side view which shows the eccentric drive unit with respect to a sub cutting device. It is a left view which shows a linkage mechanism. It is a front view which shows a linkage mechanism. It is sectional drawing which shows the engagement state of a guide member and a guide shaft. It is operation | movement explanatory drawing of a linkage mechanism. It is a whole side view of a combine when a linkage mechanism is a linkage state.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an overall side view of a combine. This combine harvests a harvesting culm at the front of a traveling machine body 2 that is driven by a pair of left and right crawler traveling devices 1 as traveling devices. A cutting and conveying device 3 serving as a cutting unit that conveys backward is connected to the left and right first axis X1 so as to be swingable up and down, and a threshing process is performed on the harvested culm from the cutting and conveying device 3 The threshing device 4 that performs a sorting process on the processed product obtained by the threshing process and the grain tank 5 that stores the grain from the threshing device 4 are mounted on the traveling machine body 2, and the traveling machine body The boarding operation part 6 is formed in the front part of the grain tank 5 in 2, and it is comprised by the whole straw throwing type | mold which used rice, wheat, etc. as the harvesting grain straw.

  As shown in FIG. 1 and FIG. 2, the cutting and conveying apparatus 3 is configured such that the dividers 7 provided on the left and right ends of the front part whip the harvesting target culm and the non-reaching target culm as the traveling machine body 2 travels. The rotary reel 8 provided above the front part of the cutting and conveying device 3 is equipped with the bottom of the cutting and conveying device 3 by scraping the harvested culm separated by the left and right dividers 7 backward. The clipper-shaped main cutting device 9 cuts a predetermined portion of the cropping target culm, and the auger 10 provided behind the main cutting device 9 determines the chopping target culm after cutting by the main cutting device 9 in the left-right direction. While gathering to a location, it sends out toward the rear at the predetermined location, and the transport mechanism 11 as a transport device extending from the predetermined location to the front upper part of the threshing device 4 directs the harvested culm from the auger 10 to the threshing device 4 Transport Then, the hydraulic cylinder 12 installed over the transport mechanism 11 and the traveling machine body 2 is swung up and down around the first axial center X1 in the left-right direction. The cutting height adjustment for changing the height position of 9 can be performed.

  Further, on the lower side of the cutting and conveying device 3, a sub-cutting device 14, which is a clipper-type cutting device that cuts the planted cereal at a position lower than the main cutting device 9, is mounted on the traveling machine body 2 so as to swing up and down. The three elevating frames 13A, 13B, and 13C are provided so as to be supported.

Next, the support structure of the clipper-type auxiliary cutting device 14 will be described.
As shown in FIG. 2 to FIG. 4, a horizontal frame 16 made of a square pipe facing left and right is installed on the upper surface of the front end of the traveling machine body 2. The horizontal frame 16 is provided separately by a left frame portion 16A located on the left side with the mission case 24 in between and a right frame portion 16B located on the right side of the mission case 24, and two frames in the vicinity of both ends of the left frame portion 16A. The bearing portions 17 are provided at three locations of the location and the right end of the right frame portion 16B.
As shown in FIGS. 6 and 7, the bearing portion 17 includes a leg portion 17A attached to the right and left frame portions 16A and 16B, and a boss portion 17B integrally formed with the leg portion 17A. A cylindrical shaft 18 is swingably mounted through a needle bearing.

  A plate-shaped receiving bracket 16a is attached to a mounting portion of the sideways frame 16 with respect to the bearing portion 17, and the leg portion 17A of the bearing portion 17 is fastened and fixed to the receiving bracket 16a with a bolt 15 so that the bearing portion 17 is turned sideways. The frame 16 is configured to be detachable.

  The cylindrical shaft 18 in each of the three bearing portions 17 protrudes laterally along the second axis X2 from the boss portion 17B of the bearing portion 17, and the lifting frames 13A, 13B, and 13C are connected and fixed to the protruding portions, respectively. It is. The center lifting frame 13A, the right lifting frame 13B, and the left lifting frame 13C supported by the bearing portion 17 at three locations in the left and right direction extend toward the front of the machine, and the center lifting frame 13A, the right lifting frame 13B, and the left lifting The frame 13C is configured to be vertically swingable.

The structure of the center side lifting frame 13A located at the approximate center in the traveling machine body width direction among the three lifting frames 13A, 13B, 13C will be described.
The central elevating frame 13A is integrally connected to the cylindrical shaft 18 and is positioned between the cutting and conveying device 3 and the axle case 25 positioned below the central lifting frame 13A, and extends linearly downward from the boss portion 17B. The frame portion 13a and a curved frame portion 13b that extends downward from the front end portion of the axle case 25 from the front end portion of the linear frame portion 13a are provided.

  That is, as shown in FIG. 6, the central elevating frame 13 </ b> A is positioned between the transport mechanism 11 and the axle case 25 positioned below the transport mechanism 11, and extends linearly. A curved frame portion 13b that extends downward from the front end portion of the linear frame portion 13a in a curved manner on the front side of the axle case 25 is configured in a state in which a single frame material is formed by bending. is there. Further, the central lifting frame 13A includes a forward frame portion 13c that extends forward from the lower end of the curved frame portion 13b.

  In other words, the straight frame portion 13a and the curved frame portion 13b are formed by bending a single frame material, and the straight frame portion 13a and the curved frame portion 13b are formed. Are connected in a smoothly curved state rather than bent. For example, even if the auxiliary cutting device 14 contacts the heel and a force toward the rear side of the body acts, the internal stress is locally It is difficult to damage because it does not concentrate.

  A receiving frame 49 is provided on the upper surface of the linear frame portion 13a, and the receiving frame 49 abuts on the lower surface of the transport case 11A of the transport mechanism 11, so that the auxiliary cutting device 14 and the bottom plate of the auger 10 are connected. Preventing contact.

  Of the three lifting frames 13A, 13B, and 13C, the right lifting frame 13B located on the right side in the lateral width direction of the traveling vehicle body is a base frame portion that extends toward the front of the vehicle body at the right outer side portion of the right traveling device. 13d, a lateral frame portion 13e extending from the distal end of the base end side frame portion 13d to the front outer side portion of the right traveling device 1 toward the center side in the lateral direction of the vehicle body, and from the distal end of the lateral frame portion 13e to the front of the vehicle body And a front-rear frame portion 13f extending toward the front.

  That is, as shown in FIGS. 3, 7, and 8, the right elevating frame 13 </ b> B is bent in a crank shape in plan view, and by bending in this way, the right side of the traveling machine body in the lateral width direction of the auxiliary cutting device 14. When the end portion is substantially the same as the position of the right end portion of the right traveling device 1 in the front-rear direction of the traveling machine body 2, when the cutting operation is performed along the heel, the auxiliary cutting device 14 is on the ground on the heel side. It is easy to avoid touching.

  As shown in FIG. 5, of the three lifting frames 13A, 13B, and 13C, the left lifting frame 13C located on the left side in the horizontal direction of the traveling machine body is a single frame that extends linearly obliquely downward. It consists of parts.

  And the urging means A which urges | biases the sub cutting device 14 upward is provided in the state which acts on the linear frame part 13a in 13 A of center side raising / lowering frames.

  As shown in FIG. 6, the urging means A includes a compression coil spring 19, a support bolt shaft 20 positioned at the axial position of the compression coil spring 19, a holder 21 screwed into the lower end of the support bolt shaft 20, and the compression coil spring 19. The upper and lower receiving disks 22A and 22B receive the upper and lower ends of the upper and lower ends. An angle-shaped receiving frame 23 that supports the lower receiving disk 22B extends forward from the front end frame 2A of the traveling machine body 2 in the vertical orientation, and the front end portion of the receiving frame 23 extends from the mission case 24 to the left and right crawler type. It is supported by an axle case 25 that extends toward the drive sprocket 1 </ b> A of the traveling device 1.

  The receiving disk 22B is placed on the receiving frame 23, and a holder 21 that is externally fitted to the lower end of the support bolt shaft 20 is held in the axial position of the receiving disk 22B. The support bolt shaft 20 supported by the lower receiving disk 22B via the holder 21 extends upward toward the central lifting frame 13A, and the upper receiving disk 22A is mounted at the extended upper end position.

A dish-shaped receiving device 26 is attached to the lower surface of the central lifting frame 13A, and an adjusting bolt 27 is attached to the receiving device 26. The lower end bolt head 27 </ b> A of the adjustment bolt 27 is brought into contact with the upper end bolt head 20 </ b> A of the support bolt shaft 20, and the center side lifting frame 13 </ b> A is pushed up and biased by the compression coil spring 19 described above. By adjusting the adjusting bolt 27 to move up and down in the vertical direction with respect to the receiving member 26, the position of contact with the upper receiving disk 22A can be adjusted, and the pushing-up biasing force of the compression coil spring 19 can be adjusted.
When the three bearing portions 17 are removed from the lateral frame 16, the entire assembly including the three lifting frames 13A, 13B, 13C and the auxiliary cutting device 14 can be removed together with the bearing portion 17, and can be attached again. It is.

  The eccentric drive unit C for driving the auxiliary cutting device 14 is supported by the bearing portion 17 located on the left side, and the drive rod shaft 44, the bearing block 46, and the swing drive arm 47 are attached to the left lifting frame 13C.

  Next, the structure of the auxiliary cutting device 14 will be described. As shown in FIGS. 5 to 10, the sub-cutting device 14 includes an angle-shaped base 29 that is attached and fixed back to back on a connecting frame 15 that extends across the body width direction, and a receiving blade 30 that is attached to the base 29. And a movable blade 31 supported by the receiving blade 30, a knife bar 32 that drives the movable blade 31, and a knife clip 33 that holds the knife bar 32.

  A hook 48 is attached to the downward surface of the connecting frame 15 so as to project later, and the sub-cutting device 14 can easily follow the unevenness of the cutting surface. The hooks 48 are provided at three positions in the lateral direction of the connecting frame 15 and are provided below the elevating frames 13A, 13B, and 13C.

  As shown in FIGS. 9 and 10, the movable blade 31 of the sub-cutting device 14 has a cereal cross feed member for feeding the cut stalk to one side in the width direction of the machine body in a state of reciprocating integrally with the movable blade 31. 34 is attached. This grain straw transverse feed member 34 is connected to the movable blade 31 with a bolt in an oblique posture in which the long plate-like body in the lateral width direction of the machine body is positioned upward toward the rear side, and reciprocally moves integrally with the movable blade 31. It is provided in the state to do. The corn straw horizontal feed member 34 is formed with a sawtooth-shaped feed action portion on the upper side, and is configured so as to be able to feed the stem stalk harvested by reciprocating movement to one side in the lateral width direction of the machine body. .

Further, the auxiliary cutting device 14 is provided with various weed cover bodies 28 for preventing the cut stems from being caught and accumulated.
That is, the connecting frame cover body 28A provided for the stalks to stay in the space above the connection frame 15, and the cut stalks are caught by the bent portions of the forward frame portion 13c and the curved frame portion 13b. An elevating frame cover body 28B is provided to prevent this.

  As shown in FIGS. 9 and 10, the connecting frame cover body 28A is supported on the base 29, and as shown in FIGS. 6, 8, 9 and 12, the lifting frame cover body 28B is Provided in a state of being inclined to the upper front end portion of the forward frame portion 13c and the upper portion of the curved frame portion 13b and being fixed to the frame portions 13b and 13c in a form in which the cross-sectional shape is a mountain shape. It has been.

The transmission mechanism E for the movable blade 31 of the auxiliary cutting device 14 will be described.
As shown in FIG. 13, a pair of left and right rolling bearings 35 are housed in the internal space of the cylindrical shaft 18 supported by the bearing portion 17 located at the left end of the three bearing portions 17, and the left and right rolling bearings are provided. A drive shaft 36 is supported over 35. A rotating boss 38 to which an input sprocket 37 is attached is attached to a cantilever end portion 36A of the drive shaft 36 that protrudes from the cylindrical shaft 18. C is attached.

  The eccentric drive unit C includes a rotary core portion 39 that is attached and fixed in an eccentric state to the drive shaft 36, a swing holder portion 41 that is externally fitted to the rotary core portion 39 via a large bearing 40, The swing fork part 41 is composed of a drive fork part 43 mounted on the upper and lower end shafts 41 </ b> A via small bearings 42.

  The rotary core portion 39 attached to the drive shaft 36 rotates integrally with the drive shaft 36 but is in an eccentric state, so that the swinging holder portion 41 is fitted on the rotary core portion 39 via a large bearing 40. Is driven to swing left and right around an axis perpendicular to the rotational axis of the drive shaft 36, as indicated by arrows (ab). The drive fork portion 43 that is externally fitted to the upper and lower end shafts of the swing holder portion 41 also swings so as to swing left and right in conjunction with the drive fork portion 43. In this way, the eccentric drive unit C constitutes a rotation conversion mechanism that converts the rotational motion of the drive shaft 36 into the left-right reciprocating motion of the drive rod shaft 44.

As shown in FIGS. 2 to 5, the drive fork portion 43 is fixedly attached with a drive rod shaft 44 in a forward and downward posture, and the drive rod shaft 44 extends to the vicinity of the auxiliary cutting device 14. A mounting base 45 extends from the lower end of the left elevating frame 13C toward the drive rod shaft 44, and a bearing block 46 fixed to the front end side of the mounting base 45 rotatably supports the front end of the drive rod shaft 44. is doing.
With such a configuration, the drive rod shaft 44 is configured to be swingable around the axis Z of the drive rod shaft 44 itself in conjunction with the left-right swing of the drive fork portion 43.

  A swing drive arm 47 is attached and fixed to a lower end portion of the drive rod shaft 44 that projects downward from the bearing block 46, and an arm linkage portion 47 </ b> A extending from the swing drive arm 47 is linked to the knife bar 33 for the movable blade. ing.

With the configuration as described above, the movable blade 31 has the input sprocket 37, the drive shaft 36, the rotary core portion 39, the swing holder portion 41, the drive fork portion 43, the drive rod shaft 44, the swing drive of the eccentric drive unit C. It is reciprocated to the left and right by the driving force transmitted through the arm 47 and the arm linkage portion 47A.
Therefore, the transmission mechanism E with respect to the sub cutting device 14 is comprised by these members, and this transmission mechanism E is provided in the left raising / lowering flame | frame 13C.

  Switching between a linked state in which the auxiliary cutting device 14 moves up and down in conjunction with the lifting and lowering operation of the cutting and conveying device 3 and a linkage release state in which the auxiliary cutting device 14 can move up and down independently of the lifting and lowering operation of the cutting and conveying device 3 A linkage mechanism B is provided as an operable linkage means.

Hereinafter, the linkage mechanism B will be described.
As shown in FIGS. 1, 3, 15, and 16, this linkage mechanism B is provided with a guide member 51 in which a guide long hole 50 is formed on the side of the auxiliary cutting device 14, and along the long hole 50. Linking operation state in which a guide shaft 52 as a guided body that is movably engaged and guided is provided on the cutting and conveying device 3 side, and the movement along the long hole 50 of the guide shaft 52 is restrained. The guide member 51 is provided with a switching operation body 53 that can be switched between a linkage releasing operation state that allows movement of the guide shaft 52 along the long hole 50.

  Specifically, as shown in FIGS. 2 to 4, the linkage mechanism B is attached across the central lifting frame 13 </ b> A of the three lifting frames 13 </ b> A, 13 </ b> B, and 13 </ b> C and the transport case 11 </ b> A of the transport mechanism 11. The linkage mechanism B includes a guide member 51 that is long in the vertical direction. As shown in FIG. 6, the lower end portion of the guide member 51 is attached to a lever support shaft 54 fixed to the central lifting frame 13A.

  As shown in FIG. 3, the guide member 51 is formed by integrally connecting a guide action part 51A having a substantially U-shaped cross section located on the upper side and a rectangular tube-like connection support part 51B located on the lower side. As shown in FIGS. 15 and 16, the guide action part 51A is constituted by a substantially U-shaped channel member having side plate parts 51b and 51b on both sides of the central wall part 51a. A long hole 50 is formed in the central wall portion 51a along the vertical direction.

  A guide shaft 52, which is a laterally guided body of the traveling machine body with the tip portion slidably engaged with the elongated hole 50 of the guide member 51, is fixed to the lateral side portion of the transport case 11A. A resin-made bush guide 56 as a sliding contact guide body having an annular groove-shaped recess 55 is externally fitted to the tip of the guide shaft 52, and the guide member 51 is fitted into the recess 55 of the bush guide 56. The guide shaft 52 is engaged and guided in a state where the inner edge portion of the long hole 50 enters and engages.

  The guide member 51 is a switching operation body 53 that can be switched between a linkage operation state that restricts movement of the guide shaft 52 along the long hole 50 and a link release operation state that allows movement of the guide shaft 52 along the long hole 50. It has. When the switching operation body 53 is switched to the linkage operation state, the switching operation body 53 restricts the movement of the guide shaft 52 associated with the lifting operation of the cutting and conveying device 3 at the linkage setting position P in the long hole 50, In a state where the switching operation body 53 is switched to the linkage operation state, the guide shaft 52 moves from the linkage setting position P to the ascending operation side of the cutting and conveying device 3 toward the linkage setting position P. Therefore, the switching operation body 53 is provided in a state in which it can be moved backward and is urged to return to the linkage operation state.

In other words, the switching operation body 53 is supported by the guide member 51 so as to be freely swingable between the linkage operation state and the linkage release operation state, and the toggle operation state of the linkage operation state and the linkage release operation state by the toggle spring 57. Each is configured to be held in position by an elastic biasing force.
That is, as shown in FIG. 15, the switching operation body 53 includes a manual operation portion 53 a on the upper side and a regulation operation portion 53 b that acts on the guide shaft 52 on the lower side by bending a bar in a substantially Z shape. The manual operation portion 53a and the regulating action portion 53b are connected by a relay portion 53c, and a bracket 58 provided in a fixed state between the manual operation portion 53a and the relay portion 53c is fixed on the guide member side. The unit 59 is pivotally supported so as to be swingable around an axis X3 along the width direction of the fuselage. The bracket 58 is bent in a substantially L shape, and a toggle spring 57 is stretched between a swing side end portion of the bracket 58 and a spring receiving portion 60 formed on the guide member 51.
The manual operation portion 53a of the switching operation body 53 is disposed at a position where the driver can reach the driver from the boarding operation portion 6 and operate.

  When the switching operation body 53 is swung in the clockwise direction in FIG. 15 beyond the dead point by a manual operation, the switching operation body 53 is switched to the linkage operation state (the state shown by the solid line in FIG. 15), and the elastic biasing force of the toggle spring 57 The position is held in the linkage operation state (this state corresponds to the linkage state of the linkage mechanism B). Further, when the manual operation is performed to swing the counterclockwise direction in FIG. 15 beyond the dead point, the operation is switched to the linkage release operation state (indicated by the phantom line in FIG. 15), and the elastic biasing force of the toggle spring 57 is changed. The position is held in the linkage release operation state (this state corresponds to the linkage release state of the linkage mechanism B).

  The switching operation body 53 is located in a state of penetrating through the through holes 61 and 61 formed in the side plate portions 51b and 51b on both sides of the guide member 51 in the linkage operation state, and the upper end of the through hole 61 The position is held in contact with the edge, and in this state, the upward movement of the guide shaft 52 positioned on the lower side along the long hole 50 is restricted. In this state, the sub-cutting device 14 and the cutting and conveying device 3 are connected so that the sub-cutting device 14 moves up and down on the transfer case 11A.

  When the switching operation body 53 is switched to the linkage release operation state, the guide shaft 52 is movably guided along the elongated hole 50 of the guide member 51 as the transfer case 11A is moved up and down, and the auxiliary cutting is performed. The sub-cutting device 14 and the transport case 11A are disconnected so that the device 14 can be lifted and lowered independently of the lifting operation of the transport case 11A.

  In such a configuration, for example, as shown in FIG. 18, in the state where the guide shaft 52 is located above the linkage setting position P (the state shown in FIG. 18B), the switching is erroneously performed. Even when the operating body 53 is switched to the linkage operating state (the state shown in FIG. 18C), the cutting and conveying device 3 is lowered, the sub-cutting device 14 is grounded, and the guide shaft 52 is linked. When the relative movement is made with respect to the guide member 51 so as to return to the set position P, the switching operation body 53 is pushed by the guide shaft 52 and elastically moved backward as shown in FIG. The shaft 52 returns to the linkage setting position P. After the guide shaft 52 returns to the linkage setting position P, the switching operation body 53 automatically returns to the linkage operation state (the state shown in FIG. 18E) by the elastic biasing force of the toggle spring 57.

The guide member 51 is provided with a restricting tool 62 that regulates an operation limit of movement of the guide shaft 52 that accompanies the lifting operation of the cutting and conveying device 3, and the attachment position of the restricting tool 62 with respect to the guide member 51 is the length of the long hole 50. It can be changed and adjusted along the direction.
That is, as shown in FIG. 15, a restricting tool 62 composed of a headed pin is provided in a state of penetrating through the through holes 63 and 63 formed in the side plate portions 51 b and 51 b on both sides of the guide member 51. As shown in FIG. 16, the through holes 63 are formed at a plurality of locations (four locations in the example shown in the figure) at intervals along the longitudinal direction of the long holes 50. By attaching the restricting tool 62 to any one of the plurality of through holes 63, the attachment position of the restricting tool 62 to the guide member 51 can be changed and adjusted along the longitudinal direction of the long hole 50.

  By providing the restricting tool 62 as described above, when the cutting and conveying device 3 is raised to a set height or higher even if the switching operation body 53 is switched to the linkage release operation state, the elongated hole of the guide shaft 52 is provided. When the movement within 50 is restricted and the guide shaft 52 is moved in conjunction with the guide member 51, the auxiliary cutting device 14 is lifted in conjunction with the lifting operation of the cutting and conveying device 3.

  As a result, the switching operation body 53 is switched to the linkage release operation state, and the main cutting device 9 is lifted so as to cut only the tip of the planted culm, and the auxiliary cutting device 14 is moved to the planted culm. When cutting operation is performed in a work mode set at a low position so as to cut the stock, when the turning operation is performed approaching the heel, even if the switching operation body 53 is not switched to the linked state, When the cutting and conveying apparatus 3 is greatly raised, the auxiliary cutting apparatus 14 can also be raised in conjunction with it, and contact with the field scene can be avoided.

  Then, by changing and adjusting the attachment position of the restricting tool 62 with respect to the guide member 51 along the longitudinal direction of the long hole 50, the position where the restricting tool 52 starts to act is determined as the machine lift position of the cutting and conveying apparatus 3 according to the work situation. It can be changed and set in advance at an appropriate position.

At the lower end portion of the guide member 51, there are provided two pivot boss portions 64 which are attached in a state where the lever support shafts 54 are fitted to each other at different positions in the vertical direction. The relative position of the guide member 51 with respect to the auxiliary cutting device 14 can be changed and adjusted.
Thus, by changing the position of the lower end portion of the guide member 51, it is also possible to change and set the ascending position of the cutting and conveying apparatus 3 at which the restricting tool 52 starts to act.

  In addition, a large-diameter portion 36a for fitting for mounting the bush guide 56 at the time of assembly is formed at the lower end portion of the long hole 50 formed in the guide member 51. The cutting and conveying device 3 is lowered most. Even if it makes it, the guide shaft 52 does not move below the linkage setting position P, and does not move to the large diameter portion 50a.

  Then, at the time of cutting, as shown in FIG. 1, the linkage mechanism B is switched to the linkage release state by switching the switching operation body 53 to the linkage release operation state. Further, when traveling over the heel, as shown in FIG. 19, the linkage mechanism B is switched to the linkage state by switching the switching operation body 53 to the linkage operation state.

Since the linkage mechanism B is switched to the linkage-released state at the time of the cutting operation, the sub-cutting device 14 moves up and down while following the ground to the ground. However, the arrangement height of the main cutting device 9 is approximately the rear of the main cutting device 9. It is located at the same arrangement height and does not perform the cutting action.
Then, when traveling over the heel, as shown in FIG. 19, in order to avoid contact with the heel, the cutting and conveying device 3 is greatly raised to the raised non-working position, but the linkage mechanism B is in the linked state. If the cutting and conveying device 3 is lifted to the non-working position, the secondary cutting device 14 is lifted by the cutting and conveying device 3 due to the linkage by the linkage mechanism B. Can be prevented from touching.

[Another embodiment]
(1) In the above-described embodiment, the configuration in which the guide member is provided on the sub-cutting device side and the guide shaft as the guided body is provided on the cutting and conveying device side is illustrated as the linking device. Instead of the configuration, a guide member may be provided on the cutting and conveying apparatus side, and a guide shaft as a guided body may be provided on the sub-cutting apparatus side.

(2) In the above-described embodiment, the linkage mechanism B as the linkage means is provided on the boarding operation unit 6 side of the transport case 11A. Instead of this configuration, the linkage mechanism B is installed on the transport case 11A. It is good also as a structure provided in the location on the opposite side to the driving | operation part 6 side.
In this case, the lower end portion of the guide member 51 is attached to the left elevating frame 13C, and the guide shaft 52 is located on the opposite side to the boarding operation portion 6 side of the transport case 11A, that is, on the left side in the aircraft traveling direction. As a result, the switching operation body 53 is manually operated from the left outer side of the traveling machine body.

(3) In the above embodiment, the guide member is exemplified by a channel material having a substantially U-shaped cross section. However, instead of such a configuration, for example, a configuration including a flat plate member, etc. The present invention may be implemented in other forms.

(4) In the above-described embodiment, the guide member is provided with a restricting tool that regulates the operation limit of the movement associated with the lifting operation of the cutting and conveying device of the guided body, and the attachment position of the restricting tool to the guide member is the long hole. Although it was configured to be able to be changed and adjusted along the longitudinal direction, instead of such a configuration, the mounting position of the regulating tool relative to the guide member may be fixed, or a configuration without such a regulating tool may be provided. . When the restriction tool is not provided as described above, the movement of the guided body is restricted at the edge of the long hole.

(5) In the above embodiment, the switching operation body is held by the elastic biasing force in each of the linkage operation state and the linkage release operation state by the toggle spring, but instead of such a configuration, Various configurations such as a configuration including a dedicated operation tool for position holding can be employed.

  INDUSTRIAL APPLICABILITY The present invention can be used for a combine for harvesting various crops such as rice, wheat and soybeans.

3 Cutting and conveying equipment (cutting part)
9 Main cutting devices 13A, 13B, 13C Elevating frame 14 Sub cutting device 50 Long hole 51 Guide member 51a Wall surface portion 51b Side plate portion 52 Guide shaft (guided body)
53 Switching operation body 55 Recess 56 Bush guide (sliding contact guide body)
57 Toggle spring 61 Through-hole 62 Restrictor 63 Through-hole B Linking mechanism (linking means)
P Link setting position

Claims (7)

A combine provided with a main cutting device that reaps the planted stalk and a sub-cutting device that reaps the planted stalk at a position lower than the main cutting device,
The main cutting device is supported by a cutting portion that is mounted on a traveling machine body so as to be swingable up and down, and the sub-cutting device is supported by a lifting frame that is mounted on the traveling machine body so as to be swingable up and down.
Switching operation can be switched between a linkage state in which the secondary cutting device moves up and down in conjunction with the lifting operation of the cutting unit and a linkage release state in which the secondary cutting device can move up and down independently of the lifting operation of the cutting unit. Linking means,
The linkage means includes a guide member having a guide hole formed therein, and a guided body that is engaged and guided so as to be movable along the slot. The other is provided in a state of being provided on the side of the sub-cutting device, and the linked operation state for restricting the movement of the guided body along the long hole and the movement of the guided body along the long hole are provided. A combine that includes a switching operation body that can be switched to a permissible linkage release operation state in the guide member. When the switching operation body is switched to the linkage operation state, the switching operation body regulates the movement of the guided body at the linkage setting position in the long hole in accordance with the raising operation of the cutting part. As
In a state where the switching operation body is switched to the linkage operation state, the guided body is moved from the linkage setting position to the ascending operation side of the cutting unit to the linkage setting position. The combine according to claim 1, wherein the combiner is provided in a state in which the switching operation body is retractably displaceable and is urged to return to the linkage operation state so as to allow movement toward the direction.   The switching operation body is supported by the guide member in a swingable manner between the linkage operation state and the linkage release operation state, and in each of the linkage operation state and the linkage release operation state by a toggle spring. The combine according to claim 1 or 2, wherein the combine is configured to be held by an elastic biasing force. A resin-made sliding contact guide body provided with an annular groove-shaped recess is externally fitted to the guided body,
2. The guided body is configured to be engaged and guided by the long hole in a state where an inner edge portion of the long hole of the guide member enters and engages with the concave portion of the sliding guide body. 4. The combine according to any one of 3.   The combiner according to any one of claims 1 to 4, wherein the guide member is provided with a restricting tool that regulates an operation limit of movement of the guided body in accordance with a lifting operation of the cutting portion.   The combine of Claim 5 comprised so that a change position of the attachment position with respect to the said guide member of the said control tool can be adjusted along the longitudinal direction of the said long hole. The guide member is configured by a substantially U-shaped channel material having side plate portions on both sides of a central wall surface portion, and the elongated hole is formed in the central wall surface portion,
The restricting tool is provided in a state of penetrating through a through hole formed in a side plate portion on both sides of the guide member,
The switching operation body is positioned in a state of penetrating through the through holes formed in the side plate portions on both sides of the guide member in the linkage operation state, and is brought into contact with the edge of the through hole and The combine of Claim 5 or 6 comprised so that the movement along the said long hole of a guide body may be controlled.

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