JP2012152135A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that in a constitution in which a combine harvester includes a drop regulation means for regulating the lowest drop position of a reaping apparatus or in a constitution to reduce the ground contact pressure of the reaping apparatus, the reaping apparatus may be brought into contact with a field.SOLUTION: The combine harvester includes a travel device 2 below a machine frame 1, a thresher 3 on the upper one side of the machine frame and the reaping apparatus 4 in front, which is supported vertically rotatably by a reaping support frame 16 and lifted and lowered by a reaping vertical cylinder 19. The combine harvester has an auxiliary urging means 20 that assists an upper evacuation of the reaping apparatus 4 when the reaping apparatus 4 is urged to a rising side and a sledge body 8B mounted on the lower part of the reaping apparatus 4 is pushed up by the projection of a farm field, separately from the reaping vertical cylinder 19, and the drop regulation means 30 for regulating the lowest drop position of the reaping apparatus 4. The lowest drop regulation position by the drop regulation means 30 is changeable.

Description

  The present invention relates to a combine.

2. Description of the Related Art Conventionally, a configuration in which a lowering restricting means for restricting the lowest descending position of a mowing device is provided between a frame that supports the mowing device and the upper and lower harvesting cylinders (Patent Document 1).
Conventionally, a configuration in which a cutting device that moves up and down by a cutting upper and lower cylinder is provided in front of the body frame, and auxiliary support means that reduces the ground pressure of the cutting device by supporting the cutting device separately from the cutting upper and lower cylinder is known. (Patent Document 2).

JP 10-155325 A JP 2004-267123 A

Among the known examples, the former is merely provided with a lowering restricting means for restricting the lowest descending position of the harvesting device, so that there is a problem that the harvesting device comes into contact with the field depending on the field conditions.
Moreover, since the latter of the known examples merely reduces the ground pressure of the reaping device, the reaping device may come into contact with the field when adjusting the height of the reaping device or by an erroneous operation. There are challenges.
In the present application, the configuration of the reaping device is devised so as to avoid contact of the reaping device with the field.

According to the first aspect of the present invention, the traveling device 2 is provided below the machine body frame 1, the threshing device 3 is provided on the upper side of the machine body frame 1, and the machine frame 1 can be rotated up and down by a cutting support frame 16 in front of the machine body frame 1. Is provided with a cutting device 4 that is moved up and down by a cutting upper and lower cylinder 19, and separately from the cutting upper and lower cylinder 19, the cutting device 4 is urged upward to provide a housing 8 </ b> B provided at the lower portion of the cutting device 4. Auxiliary urging means 20 is provided to assist the retraction of the reaping device 4 when pushed up by the convex portion of the surface, a lowering restricting means 30 for restricting the lowest descending position of the reaping device 4 is provided, and the lowering restricting means 30 is configured to be capable of changing the position of the lowest descent by 30. When the traveling device 2 travels and the harvesting device 4 reaps the cereal of the field, the harvesting device 4 When pushed up the convex portion, cutting device 4 upward retracted by an auxiliary biasing means 20, to prevent the plunge in the field.
In this case, since the lowering position of the cutting device 4 by the lowering restriction means 30 can be set in advance according to the field conditions and the cutting operation can be performed, when the cutting device 4 is lowered, the cutting device 4 reaches the set height. Further descending is regulated by the descent regulating means 30 to prevent the cutting device 4 from being pushed into the field.
According to the second aspect of the present invention, the auxiliary biasing means 20 has a front end spring mechanism 25A having a front end portion attached to the cutting support frame 16 side and a spring 42 inside, and a base portion attached to the body frame 1 side. A telescopic rear spring mechanism 25B having a spring 42 therein is provided, and the base portion of the front spring mechanism 25A and the tip end portion of the rear spring mechanism 25B are connected by an intermediate mounting shaft 26 so as to be able to bend and rotate in the vertical direction. The rear spring mechanism 25B extends and contracts only in the front-rear direction and is attached to the body frame 1 so as not to rotate in the up-down direction, and the auxiliary biasing means 20 is provided with the lowering restricting means 30, The lowering restricting means 30 screws the double nut 43 into a screw groove formed on the outer periphery of the base cylinder 41 that is telescopically fitted inside the distal end cylinder 40 of the rear spring mechanism 25B, and the cutting device 4 is lowered. did In this case, the combine is characterized in that the rear end of the front end tube 40 abuts against the double nut 43 to restrict the lowering of the reaping device 4. When the harvesting device 4 is pushed up to the convex portion of the farm scene when the grain husks are harvested by 4, the harvesting device 4 is retracted upward by the auxiliary biasing means 20 and prevented from being pushed into the farm field.
The double nut 43 of the screw groove formed on the outer periphery of the base cylinder 41 of the rear spring mechanism 25B of the auxiliary biasing means 20 is rotated in the axial direction of the base cylinder 41 so that the rear end of the tip cylinder 40 is moved. The position where it hits the double nut 43 is changed in the axial direction of the base cylinder 41, and the lowest position of the reaping device 4 is set.
In the invention according to claim 3, the auxiliary biasing means 20 includes a front end spring mechanism 25A having a tip attached to the cutting support frame 16 side and a spring 42 inside, and a base attached to the body frame 1 side. A telescopic rear spring mechanism 25B having a spring 42 therein is provided, and the base portion of the front spring mechanism 25A and the tip end portion of the rear spring mechanism 25B are connected by an intermediate mounting shaft 26 so as to be able to bend and rotate in the vertical direction. The rear spring mechanism 25B extends and contracts only in the front-rear direction and is attached to the body frame 1 so as not to rotate in the up-down direction, and the auxiliary biasing means 20 is provided with the lowering restricting means 30, The lowering restricting means 30 screws a screw groove provided on the inner periphery of the intermediate tube 44 into a screw groove formed on the outer periphery of the base tube 41 that is telescopically fitted inside the distal end tube 40 of the rear spring mechanism 25B. Combine and cut When the lower part 4 is lowered, the front end of the intermediate cylinder 44 is brought into contact with the inner surface of the mounting plate 45 of the front end cylinder 40 to restrict the lowering of the reaping device 4. When the harvesting device 4 is pushed up to the convex part of the farm scene when traveling by the traveling device 2 and harvesting the cereals of the field by the harvesting device 4, the harvesting device 4 is retreated upward by the auxiliary urging means 20 and enters the field. Prevent rushing.
The intermediate cylinder 44 screwed into the screw groove on the outer periphery of the base cylinder 41 of the rear spring mechanism 25B of the auxiliary biasing means 20 is rotated with respect to the base cylinder 41 and moved in the axial direction of the base cylinder 41. By doing so, the position where the rear end of the tip tube 40 hits the double nut 43 is changed in the axial direction of the base tube 41, and the lowest position of the reaping device 4 is set.
According to a fourth aspect of the present invention, the lowering restricting means 30 is provided between the cutting device 4 and the cutting upper and lower cylinders 19, and the lowering restricting means 30 is rearwardly attached to the mounting member 31 provided on the cutting support frame 16 side. The stopper 32 is mounted on the side of the cylinder cylinder 34 of the cutting upper and lower cylinders 19 and the abutting member 35 is adjustable to adjust the front and rear position. When the traveling device 2 travels and the harvesting device 4 harvests the rice straw in the field, the harvesting device 4 is pushed up to the convex portion of the farm scene. Is retracted upward by the auxiliary urging means 20 and prevented from being pushed into the field.
The lowering restricting means 30 for restricting the lowest descending position of the reaping device 4 includes a stopper 32 which is attached to a mounting member 31 provided on the reaping support frame 16 side by a shaft 33 so that a rearward protruding position can be switched, and the reaping upper and lower cylinders. 19 is provided with an abutting member 35 that is provided on the cylinder cylinder 34 side and that abuts against the rearward projecting portion of the stopper 32. The lowering position of the reaping device 4 is set to the normal trimming height. The stopper 32 is switched and set between a lowered position and a minus cutting lower position that is lower than the normal lowered position, and the abutting member 35 is moved back and forth with respect to the cylinder cylinder 34 to finely adjust the setting of the lowest lowered position.

In the first aspect of the invention, the grounding pressure of the cutting device 4 is reduced by the auxiliary biasing means 20 provided separately from the cutting upper and lower cylinders 19, and when the cutting device 4 comes into contact with the upper surface of the field, the cutting device 4 is retracted upward. Since the lowering position of the cutting device 4 can be restricted according to the field conditions by the lowering restricting means 30, the cutting device 4 can be applied to the upper surface of the field due to an erroneous operation or the like. You can prevent rushing.
In the invention according to claim 2, when the cutting device 4 comes into contact with the upper surface of the field by the auxiliary biasing means 20, the cutting device 4 is retracted upward, so that the cutting device 4 can be prevented from being damaged. By rotating the double nut 43 on the outer periphery of the base cylinder 41 of the rear spring holder 28, the lowermost position of the reaping device 4 can be set, the setting work can be facilitated, and the lowest position can be achieved with an extremely simple configuration. A position setting mechanism can be configured.
In the invention of claim 3, when the cutting device 4 comes into contact with the upper surface of the field by the auxiliary biasing means 20, the cutting device 4 is retracted upward, so that the cutting device 4 can be prevented from being damaged. By rotating the intermediate cylinder 44 on the outer periphery of the base cylinder 41, the lowermost position of the reaping device 4 can be set, the setting work can be facilitated, and the setting mechanism for the lowermost position can be provided with an extremely simple configuration. Can be configured.
In the invention according to claim 4, the grounding pressure of the cutting device 4 is reduced by the auxiliary biasing means 20 provided separately from the cutting upper and lower cylinders 19, and the cutting device 4 is retracted upward when the cutting device 4 comes into contact with the upper surface of the field. The cutting device 4 can be prevented from being damaged, and the position of the abutment member 35 of the lowering restricting means 30 is switched so that the lowering position of the cutting device 4 is set to the normal cutting height according to the field conditions. It is possible to easily switch between a lowered position and a minus cutting lower position that is lower than the normal lowered position, and fine adjustment of the setting of the lowest lowered position by moving the contact member 35 back and forth with respect to the cylinder cylinder 34. Can do.

The side view of a combine. FIG. 6 is a side view of the vicinity of auxiliary biasing means and descending restriction means. The side view of the other Example of a descent | fall control means. The side view which changed the descent | fall control position. The side view of the state which raised the cutting device. The side view of the other Example of a descent | fall control means. The descending position regulation state side view. The side view of the other Example of an auxiliary | assistant biasing means. The side view of the other Example of an auxiliary | assistant biasing means. The side view of the other Example of an auxiliary | assistant biasing means. The rear view and side view of another Example of an auxiliary | assistant biasing means. The front view of a pulling apparatus. The rear view of a raising case. The front view of a pulling apparatus. The front view of the other Example of the cleaning port of a raising apparatus. The perspective view of the other Example of the cleaning port of a raising apparatus. The rear view of a crawler and a wheel part. The rear view of a wheel part.

An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a machine frame, 2 denotes a traveling device provided at a lower position of the machine frame 1, 3 denotes a threshing device provided at an upper position of the machine frame 1, and 4 denotes a threshing device 3. The mowing device provided on the front side of 5 is a glen tank, 6 is a discharge auger that discharges the grains in the glen tank 5, and 7 is a control unit.
The reaping device 4 has a weeding device 8 arranged side by side at the most advanced position, and a pulling device 9 for raising the cereals weeded by the weeding device 8 is provided on the rear side of each weeding device 8, A cutting blade 10 is provided on the rear side of the device 9, and a culm transporting device 11 that transports the culm cut by the cutting blade 10 is provided on the rear side above the cutting blade 10.
The configuration of the cereal conveying device 11 is arbitrary, and a front conveying device (not shown) that conveys the cereal that has been cut by the weeding device 8, raised by the pulling device 9, and cut by the cutting blade 10. It is comprised by the rear side conveying apparatus (illustration omitted) etc. which carry out the scraping apparatus 13 and back. 12 is a cereal supply / conveyance device that supplies and transports the cereal to the threshing device 3. The takeover conveying device 13 constitutes a part of the cereal haul conveying device 11.
A part of the cereal conveying device for conveying the weeding device 8, the pulling device 9, the cutting blade 10, and the harvested culm is provided on the cutting frame 15, and the cutting frame 15 is provided on the front side of the cutting support frame 16. An upper lateral transmission case (not shown) is provided at the base of the harvesting support frame 16, and the upper lateral transmission case is rotatably attached to a harvesting suspension support base (not shown) provided on the airframe fixing portion. The base of is attached in a freely rotatable manner.
Between the cutting support frame 16 and the machine body frame 1, a cutting upper and lower cylinder 19 for raising and lowering the cutting device 4 is attached. The harvesting upper and lower cylinders 19 are constituted by a single-acting cylinder that is fed by the hydraulic pump 19A to raise the harvesting device 4 and that lowers the harvesting device 4 when the oil fed is returned.

In addition to the cutting upper and lower cylinders 19, auxiliary urging means 20 for reducing the ground pressure of the cutting device 4 is provided, and a casing 8 </ b> B provided on the lower surface of the weed hoe 21 to which the weeding device 8 is attached (FIG. The upper housing 8B is shown below the farm scene, but the configuration is not limited to this. When pushed up, the reaping device 4 is urged to be lifted and retracted, and the reaping device 4 is configured to descend by its own weight when the retracted reaping device 4 passes the convex portion of the field scene.
That is, when performing the harvesting operation with the weeding device 8 of the mowing device 4 grounded, if the housing 8B is pushed up by the convex portion of the field, the mowing device 4 is lifted and retracted, so that the mowing device 4 The height can be kept low and the cutting height can be easily adjusted.
The auxiliary biasing means 20 includes a spring mechanism 25, and the spring mechanism 25 includes a front spring mechanism 25A attached to the cutting support frame 16 side and a rear spring mechanism 25B attached to the machine body frame 1. The spring mechanism 25A and the rear spring mechanism 25B are rotatably connected by an intermediate mounting shaft 26 and connected to each other like a link mechanism (FIG. 1).
Therefore, the cutting upper / lower cylinder 19 or the auxiliary biasing means 20 is provided with a lowering restricting means 30 for restricting the lowest descending position of the cutting apparatus 4.

A stopper 32 is provided on the attachment member 31 of the cutting support frame 16 so as to be switchable by a shaft 33, and a contact member (bolt) 35 capable of moving back and forth (moving in and out) is provided on the cylinder cylinder 34 of the cutting upper and lower cylinder 19 (FIG. 2). ). The stopper 32 is configured so as to allow so-called minus cutting in which the tip of the cutting device 4 is positioned below the field scene in a normal state by changing the engaging position of the engaging pin 36 with respect to the mounting member 31.
That is, at the normal time, the tip of the reaping device 4 substantially matches the field scene, but when the rear part of the body is lowered and the reaping device 4 is lifted forward, the tip of the reaping device 4 is lowered relative to the body than at the normal time. Since the tip of the cutting device 4 is positioned below the field scene in normal times, those skilled in the art call this so-called minus cutting.
The engagement position of the engagement pin 36 is switched between the normal position and the minus cutting position, and the contact member 35 changes the contact position with the stopper 32, so that the lowermost position of the cutting device 4 is adjusted according to the field conditions. Set.
Therefore, it is possible to achieve both switching of the position of the stopper 32 and fine adjustment of the front and rear position of the contact member 35 to improve workability and operability.

In the embodiment of FIG. 2, the auxiliary biasing means 20 is not the part corresponding to the front spring mechanism 25 </ b> A among the part corresponding to the front spring mechanism 25 </ b> A of the auxiliary biasing means 20 and the rear spring mechanism 25 </ b> B. The elastic member (rod) 25C is used.
(7749)
3 to 5, the lowering restricting means 30 is provided in the auxiliary biasing means 20, and the rear spring mechanism 25 </ b> B of the front spring mechanism 25 </ b> A and the rear spring mechanism 25 </ b> B is replaced by the tip tube 40. And a small-diameter base tube 41 are telescopically fitted, a spring 42 is built in the tip tube 40 and the base tube 41, and a double nut is inserted into a screw groove (not shown) formed on the outer periphery of the base tube 41. 43 is screwed together.
Therefore, when each double nut 43 is moved in the axial direction with respect to the base tube 41, the contact position between the double nut 43 and the rear end of the tip tube 40 can be changed back and forth, and the cutting device 4 can be adjusted according to the field conditions. Set the lowest position.
Further, since the lowering restricting means 30 is provided in the auxiliary biasing means 20 regardless of the mounting structure of the cutting upper and lower cylinders 19, it can be shared with the other types of cutting upper and lower cylinders 19 and the cost is reduced.

6 and 7 show another embodiment of the lowering restricting means 30, and a screw groove (not shown) provided on the inner periphery of the intermediate tube 44 is screwed into a screw groove (not shown) formed on the outer periphery of the base tube 41. When the cutting device 4 is lowered, the front end of the intermediate tube 44 is brought into contact with the inner surface of the mounting plate 45 of the tip tube 40.
Therefore, the intermediate cylinder 44 is moved in the axial direction with respect to the base cylinder 41, the contact position between the intermediate cylinder 44 and the mounting plate 45 of the distal end cylinder 40 is changed back and forth, and the reaping device 4 is adjusted to the field conditions. Set the lowest position.
Reference numeral 46 denotes a lock nut that restricts backward movement due to the slack of the intermediate cylinder 44.
8 and 9 show another embodiment of the auxiliary biasing means 20, and a portion corresponding to the front spring mechanism 25A of the auxiliary biasing means 20 and a portion corresponding to the front spring mechanism 25A among the rear spring mechanism 25B. Is formed by a rectangular tube-shaped non-expandable member (square bar) 48, and the non-expandable member 48 is rotatably attached to a pair of left and right mounting plates 49 of the front end tube 40 of the rear spring mechanism 25B by a connecting pin 50.
Therefore, it is possible to prevent the non-expandable member 48 and the rear spring mechanism 25B from rotating.

Therefore, by attaching the non-stretchable member 48 to the connecting pin 50, it is not necessary to provide another anti-rotation mechanism, and a significant increase in function and cost can be achieved.
Also, by preparing several types of non-stretchable members 48 of different lengths and selectively attaching them, the same auxiliary biasing means 20 can be shared with other models.
For ease of understanding, the reference numeral of the non-expandable member 48 in FIGS. 8 and 9 is given “25A” as a portion corresponding to the front spring mechanism 25A, but the configuration is not limited thereby.
In this case, the base cylinder 41 of the rear spring mechanism 25B is attached to the stay 50A of the machine body frame 1 so as to be movable in the axial direction.
Therefore, the total length of the auxiliary urging means 20 can be changed and adjusted, and the range in which the auxiliary urging means 20 can be shared with other models can be expanded.
FIG. 10 shows another embodiment of the auxiliary biasing means 20, and of the front side spring mechanism 25 </ b> A and the rear side spring mechanism 25 </ b> B, at least the movement that protrudes rearward in the axial direction into the front end tube 40 of the rear side spring mechanism 25 </ b> B. A member 51 is provided, and the moving member 51 is inserted into a cylindrical member 52 provided at the rear portion of the base cylinder 41, and the moving member 51 is attached to a long hole 53 provided in the cylindrical member 52 by a pin 54 so that the position of the moving member 51 can be freely changed. For ease of illustration, the end of the pin 54 is shown enlarged from the long hole 53, but the distal end tube 40 expands and contracts with respect to the base tube 41 as the pin 54 moves in the long hole 53. ).

Therefore, since the tip tube 40 can regulate the tip position of the tip tube 40 by the pin 54 coming into contact with the front end of the long hole 53, the length of the tip tube 40 is changed by changing the mounting position of the pin 54. As a result, the total length of the auxiliary urging means 20 can be changed and adjusted, and the range in which the auxiliary urging means 20 can be shared with other models can be expanded.
That is, the stopper member 55 that restricts the position of the tip tube 40 is configured by the moving member 51, the tube member 52, and the pin 54.
In this case, when the insertion portion of the moving member 51 of the stopper mechanism 55 into the cylindrical member 52 is formed in a square cross section, and either the upper or lower side or the left and right sides are brought into sliding contact with the cylindrical member 52, the rear spring mechanism 25B It can also be used as an anti-rotation mechanism for preventing the tip tube 40 from rotating with respect to the base tube 41.
Although not shown, a pin 54 that is inserted into the long hole 53 of the moving member 51 is provided on the body frame 1 side, and the position of the pin 54 can be adjusted longitudinally with respect to the body frame 1 side in the axial direction. Then, since the pin 54 can regulate the tip position of the tip tube 40, the length of the tip tube 40 can be changed by changing the mounting position of the pin 54, and as a result, the total length of the auxiliary biasing means 20. The height can be changed and adjusted, and the range in which the auxiliary biasing means 20 for other models can be shared can be expanded.

Although not shown, if a cover surrounding the moving member 51 or the pin 54 of the stopper mechanism 55 exposed at the rear part of the base tube 41 is provided, the operation of the stopper mechanism 55 can be ensured, and the auxiliary biasing means 20 The certainty of operation can be improved.
Although illustration is omitted, the pin 54 of the stopper mechanism 55 is formed by a bolt, the shaft portion of the pin 54 of the bolt is engaged with a long hole 53 provided in the cylindrical member 52, and a plurality of moving members 51 are provided. When the screw 54 is selectively screwed into any one of the screw holes, the pin 54 can be easily mounted, and the position of the pin 54 can be easily adjusted in the front-rear direction.
In this case, when the outer periphery of the pin 54 of the bolt and the outer periphery of the cylindrical member 52 is surrounded by the cover, the operation of the stopper mechanism 55 can be ensured, and the reliability of the operation of the auxiliary biasing means 20 can be improved.
Although not shown, a bolt is screwed to the rear end of the moving member 51 so as to be movable in the axial direction, and the head of the bolt is brought into contact with the rear plate of the rear end of the cylindrical member 52 to thereby stop the stopper mechanism. 55, the length of the moving member 51 can be adjusted. As a result, the total length of the auxiliary urging means 20 can be changed and adjusted, and the auxiliary urging means 20 can be shared with other models. Can be spread.

11 shows another embodiment of the stopper mechanism 55. The upper member 56 and the lower member 57 surround the moving member 51, and the engaging portion 58 provided on the moving member 51 is connected to the upper member 56 or the lower member. A stopper mechanism 55 that restricts the movement of the moving member 51 by engaging with an engaging portion 59 provided on the inner surface of the side member 57 is provided, and a rear plate 60 on the rear side of the upper member 56 and the lower member 57 is provided.
Therefore, the movement of the moving member 51 is restricted, and the moving member 51 is prevented from coming off.
FIGS. 12 to 14 show an embodiment of the pulling device 9 of the reaping device 4. The pulling device 9 is provided with at least a pair of left and right, and the left pulling device 9 has a pair of left and right lower rollers 66 at the bottom of the pulling case 65. Are provided at predetermined intervals. A cleaning port 68 is opened in one or both of the front raising cover 67 and the rear raising case 65 in the space between the left and right lower rollers 66. The cleaning port 68 is positioned above the line connecting the bottom of the left and right lower rollers 66 with the bottom side of the cleaning port 68 being lower than the line connecting the tops of the left and right lower rollers 66. To be located.

Therefore, it is easy to remove foreign substances clogged between the left and right lower rollers 66, and an oiling operation is also facilitated.
Moreover, the opening area of the cleaning port 68 can be minimized, and vibration during driving of the pulling device 9 can be reduced.
The cleaning port 68 is formed in a substantially square shape when viewed from the front.
Therefore, the removal of foreign matters is facilitated and the lubrication work is also facilitated.
The cleaning port 68 may be formed in a circular shape when viewed from the front.
One or both of the pulling cover 67 and the pulling case 65 on the rear side are provided with a closing plate 70 for closing the cleaning hole 68 (FIG. 15).
Therefore, the blocking plate 70 prevents foreign matter from entering the pulling device 9 from the cleaning port 68.
Further, by providing the closing plate 70, the lowering of the rigidity of the pulling device 9 is suppressed.

An upper portion of the closing plate 70 is attached by a hinge member 71 so as to be opened and closed.
Therefore, the closing plate 70 closes the cleaning port 68 during the normal cutting operation, and the cleaning port 68 can be opened during the maintenance operation.
Further, a hook 72 for holding the closed state of the closing plate 70 is provided between the closing plate 70 attached to the hinge member 71 so as to be freely opened and closed (FIG. 15). Reference numeral 73 denotes an engagement pin with which the hook 72 is engaged.
Therefore, the closing plate 70 reliably closes the cleaning port 68 during normal cutting work, and the cleaning port 68 can be opened without using a special tool during maintenance work.
Although not shown, an engagement hole may be provided in the closing plate 70, and an engagement member on the pulling device 9 side may be inserted and rotated to be engaged.

Although not shown, a pair of engaging members having insertion holes are provided in the closing plate 70, and a pair of engaging members are provided so that the engaging member on the closing plate 70 side faces the pulling device 9 side. The shaft member may be inserted into the engagement member on the closing plate 70 side and the engagement member on the pulling device 9 side to fix both.
In this case, it is preferable that a retaining member is attached to both ends of the shaft member inserted through the engaging member on the closing plate 70 side and the engaging member on the pulling device 9 side, so that the fixing can be more reliably performed.
Although not shown, a magnet member may be provided at the rotating end of the closing plate 70 that is attached to the hinge member 71 so as to be opened and closed, and the closing state of the closing plate 70 may be maintained by the magnetic force of the magnet member. .
Although not shown in the drawings, a through hole is formed at the rotating end of the closing plate 70 that can be opened and closed by the hinge member 71, and an engagement shaft provided on the pulling device 9 side is engaged with the through hole. The pin may be inserted through the tip of the engaged engagement shaft.

Although not shown in the drawings, a pair of left and right through holes are formed in the closing plate 70, and an engagement shaft provided on the pulling device 9 side around the cleaning port 68 is engaged with each through hole, The closing plate 70 may be fixed to the pulling device 9 side by inserting a pin through the tip of the engaged engagement shaft.
Although not shown in the drawings, rail members having engagement grooves are provided on both the left and right sides of the cleaning port 68, the closure plate 70 is engaged with the engagement grooves of the rail member from above, and a stopper provided on the closure plate 70 is provided. You may comprise so that it may contact | abut to the upper part of a rail member and the fall of the obstruction | occlusion plate 70 may be prevented.
In this case, although illustration is omitted, if the hook that engages with the engaging pin provided on the pulling device 9 side is provided at the lower part of the closing plate 70, the fixing of the closing plate 70 is further ensured.
Further, in the case where the closing plate 70 is engaged with the engaging grooves of the rail members on both the left and right sides of the cleaning port 68 from above, a pair of engaging members are provided at the lower portion of the closing plate 70, and this blocking is performed. A pair of engaging members are provided on the engaging member on the plate 70 side so as to face the pulling device 9 side, and a shaft member is inserted between the engaging member on the closing plate 70 side and the engaging member on the pulling device 9 side. Both may be fixed.

Although not shown, a pair of left and right engaging members may be provided above the closing plate 70, and a shaft member may be inserted into the engaging member to prevent the closing plate 70 from moving upward.
Further, in the case where the closing plate 70 is engaged from above with the engaging grooves of the rail members on the left and right sides of the cleaning port 68, although not shown, a notch is provided in the lower portion of the closing plate 70, and a raising device is provided at the notch portion. The closing plate 70 may be fixed by engaging the shaft portion of the bolt screwed to the 9 side from above and tightening the bolt.
Further, in the case where the closing plate 70 is engaged from above with the engaging grooves of the rail members on the left and right sides of the cleaning port 68, although not shown, a cut-and-raised portion is provided at the lower portion of the closing plate 70. The shaft member may be inserted into the cut and raised portion and the engaging member on the pulling device 9 side, and both may be fixed.

FIG. 16 shows another embodiment of the cleaning port 68. One or both of the pulling case 65 and the pulling cover 67 is formed with a protruding portion 75 protruding frontward or rearward, and the tip of the protruding portion 75 is formed. The cleaning opening 68 is opened.
Therefore, even if the cleaning port 68 is opened by the projecting portion 75, the rigidity of the pulling device 9 can be prevented from being lowered.
In this case, the protrusion 75 is formed in a quadrangle or a circle.
Although illustration is omitted, when the protrusion 75 is formed around the cleaning port 68, if the periphery of the protrusion 75 is bent (curling) to form a bent portion, the periphery of the cleaning port 68 The lowering of the rigidity of the pulling device 9 can be further suppressed.
Although not shown in the drawings, when the bent portion is bent to form a bent portion, the engaging portion that engages with either the left or right bent portion is engaged with the engaging portion. Providing a lid member having a clip portion that sandwiches the other bent portion in the state is preferable because the cleaning port 68 can be closed.

Moreover, although illustration is abbreviate | omitted, when the reinforcement board is provided in the raising case 65 and the raising cover 67 around the cleaning port 68, the fall of the rigidity of the raising device 9 of the part which opened the cleaning port 68 can be suppressed.
Although not shown, when the protrusion 75 is formed around the cleaning port 68, the protrusion 75 has a cylindrical shape, an engagement portion is provided on the outer periphery of the protrusion 75, and a cap is attached to the engagement portion. The cleaning port 68 may be closed by fitting.
Although not shown in the drawings, when the protrusion 75 is formed around the cleaning port 68, the protrusion 75 has a cylindrical shape, and the outer periphery of the protrusion 75 is formed around the opening like a so-called oil can cap. The cleaning port 68 may be closed by fitting a cap formed with a cut into the protrusion 75.

FIGS. 17 and 18 are examples of mounting of the wheel 80 of the traveling device 2, and the wheel 80 is mounted on the traveling frame 81 fixed to the machine body frame 1 so as to be freely movable up and down by the track roller shaft 82. The track roller shaft 82 is attached by being inserted into a tube-like attachment portion 83 provided on the lower surface of the square cylindrical traveling frame 81. The inner ends of the tubular mounting portion 83 and the track roller shaft 82 are not projected inward from the inner side surface of the traveling frame 81.
Therefore, even if the inner end of the crawler 84 of the traveling device 2 is bent upward, the crawler 84 is prevented from being damaged by preventing contact with the inner ends of the tubular attachment portion 83 and the track roller shaft 82.

(Operation of Example)
The reaping device 4 has a weeding device 8 arranged side by side at the most advanced position, and a pulling device 9 that raises the cereals sown by the weeding device 8 is provided on the rear side of each weeding device 8. 9 is provided with a cutting blade 10, and a rear side above the cutting blade 10 is provided with a culm transporting device 11 for transporting cereals harvested by the cutting blade 10, so that the reaping device 4 moves forward. , The weeding device 8 weeds the cereals in the field, the pulling device 9 raises the cereals that each weeding device 8 weeded, the cutting blade 10 cuts the raised cereals by the cutting blade 10 The culm transport device 11 transports the harvested culm.
The cutting frame 15 of the cutting device 4 is provided on the front side of the cutting support frame 16, and the cutting device 4 is moved up and down by the cutting upper and lower cylinders 19 to adjust the cutting height, and the adjusted cutting height is maintained and advanced. Reaping work.

The reaping device 4 is provided with auxiliary urging means 20 for reducing the contact pressure between the reaping device 4 and the field separately from the upper and lower cylinders 19. When pushed up by the convex part of the field scene, the reaping device 4 is lifted and retracted by the reaction force.
That is, as in “Yajirobe (Yajirobei)”, when the housing 8B at the tip of the reaping device 4 is slightly pushed up from the bottom by the convex portion of the farm scene, the auxiliary urging means 20 immediately moves upward. Since the weight of the reaping device 4 is supported, when the weed pod 21 of the reaping device 4 comes into contact with the upper surface of the field, the reaping device 4 is retracted upward higher than the height of the reaping operation adjusted by the reaction force. When the reaping device 4 passes through the convex portion of the field scene in the field, the reaping device 4 descends to the height of the reaping operation by its own weight and continues the reaping operation.
The auxiliary biasing means 20 prevents unnecessary sinking of the cutting device 4.

The auxiliary urging means 20 includes a spring mechanism 25. The spring mechanism 25 is attached to the cutting support frame 16 side and has a front side spring mechanism 25A having a front side small-diameter spring 42 inside, and the body frame 1 is attached to the rear side large. The rear spring mechanism 25B having the radial spring 42 is configured such that the front small-diameter spring 42 and the rear large-diameter spring 42 act in series, and the front spring mechanism 25A and the rear spring mechanism 25B are rotatable. The spring mechanism 25 is divided into a front spring holder 27 and a rear spring holder 28, and the front spring holder 27 and the rear spring holder 28 are vertically moved. The rear spring holder 28 expands and contracts only in the front-rear direction and does not rotate in the up-down direction.
That is, the spring mechanism 25 supports the cutting support frame 16 by being refracted by the top and bottom of the cutting device 4 at the portion of the intermediate mounting shaft 26 that connects the front spring holder 27 and the rear spring holder 28.

Therefore, the cutting upper and lower cylinders 19 or the auxiliary biasing means 20 are provided with the lowering restricting means 30 for restricting the lowest position of the cutting device 4, so that the lowering position of the cutting device 4 is set in accordance with the field conditions. Set.
In this case, in the embodiment of FIG. 2, a stopper 32 is provided on the attachment member 31 of the cutting support frame 16 so that the position can be switched by a shaft 33, and the cylinder barrel 34 of the cutting upper and lower cylinder 19 can be moved back and forth. Since the member (bolt) 35 is provided, the stopper 32 changes the engagement position of the engagement pin engagement pin 36 with respect to the attachment member 31, so that the tip of the reaping device 4 is located below the farm scene. Minus mowing is also possible.

That is, the tip of the reaping device 4 substantially matches the field scene during normal operation, but when the rear part of the machine body descends and the reaping device 4 rises forward, the tip of the reaping device 4 is moved relative to the machine body more than normal. A person skilled in the art calls the working position of the cutting device 4 where the tip of the cutting device 4 is lower than the field scene in a normal state, so-called minus cutting, and the engaging position of the engaging pin 36 is necessary. Is switched between the normal position and the minus cutting position, and the contact member 35 changes the contact position with the stopper 32, thereby setting the lowest lowered position of the cutting device 4 according to the field conditions.
Therefore, it is possible to achieve both switching of the position of the stopper 32 and fine adjustment of the front and rear positions of the abutting member 35, thereby improving workability and operability.

In the embodiment in which the lowering restricting means 30 of FIGS. 3 to 5 is provided in the auxiliary biasing means 20, the front spring mechanism 25B and the rear spring mechanism 25B of the front spring mechanism 25A and the rear spring mechanism 25B are replaced by the tip tube 40 and a small diameter base. A tube 41 is telescopically fitted, a spring 42 is built in the tip tube 40 and the base tube 41, and a double nut 43 is screwed into a screw groove formed on the outer periphery of the base tube 41. Therefore, when the double nut 43 is moved in the axial direction with respect to the base tube 41, the contact position between the double nut 43 and the rear end of the tip tube 40 can be changed back and forth, and the cutting device 4 is adapted to the field conditions. Set the lowest descending position.
Further, since the lowering restricting means 30 is provided in the auxiliary biasing means 20 regardless of the mounting structure of the cutting upper and lower cylinders 19, it can be shared with the other types of cutting upper and lower cylinders 19 and the cost is reduced.

In another embodiment of the lowering restricting means 30 in FIGS. 6 and 7, a screw groove (not shown) provided on the inner periphery of the intermediate tube 44 is screwed into a screw groove formed on the outer periphery of the base tube 41, and the cutting device 4 is engaged. Since the front end of the intermediate cylinder 44 is brought into contact with the inner surface of the mounting plate mounting plate 45 of the distal end cylinder 40 when the intermediate cylinder 44 is lowered, the intermediate cylinder 44 is moved in the axial direction with respect to the base cylinder 41, and the intermediate cylinder 44 And the contact position of the tip tube 40 with the mounting plate 45 are changed back and forth, and the lowest lowered position of the reaping device 4 is set according to the field conditions.
Each of the above-described embodiments is illustrated or described separately or mixed for easy understanding, but these can be combined in various ways, and the expression, configuration, action, etc. It is not limited, and there are of course cases where a synergistic effect is obtained.

  DESCRIPTION OF SYMBOLS 1 ... Airframe frame, 2 ... Traveling device, 3 ... Threshing device, 4 ... Mowing device 4, 5 ... Glen tank, 7 ... Steering part, 8 ... Weeding device, 8B ... Body, 9 ... Pulling device, 10 ... Mowing Blade 11, grain feeder, 16 chopping support frame, 19 chopping upper and lower cylinders, 20 auxiliary urging means, 21 grass cutter, 25 spring mechanism, 26 intermediate mounting shaft, 27 front spring holder, 28: Rear spring holder, 30 ... Lowering restricting means, 31 ... Mounting member, 32 ... Stopper, 33 ... Shaft, 34 ... Cylinder tube, 35 ... Contact member, 36 ... Engagement pin, 40 ... Tip tube, 41 ... Base Cylinder, 42 ... Spring, 43 ... Double nut, 44 ... Intermediate cylinder, 45 ... Mounting plate, 48 ... Non-stretchable member, 49 ... Mounting plate, 50 ... Connecting pin, 51 ... Moving member, 52 ... Cylindrical member, 53 ... Long Hole 54 ... Pin 55 ... Stopper mechanism 56 ... Upper member 5 ... Lower member, 58 ... Engagement part, 59 ... Engagement part, 60 ... Rear plate, 65 ... Pulling case, 66 ... Lower roller, 67 ... Pulling cover, 68 ... Cleaning port, 70 ... Closure plate, 71 ... Hinge Member: 72 ... Hook, 75 ... Projection, 80 ... Rolling wheel, 81 ... Traveling frame, 82 ... Track roller shaft, 83 ... Tubular mounting portion, 84 ... Crawler.

Claims (4)

  A traveling device (2) is provided below the fuselage frame (1), a threshing device (3) is provided above the fuselage frame (1), and a cutting support frame (16) is provided in front of the fuselage frame (1). A mowing device (4) is provided that is supported so as to be pivotable up and down, and is moved up and down by a mowing upper and lower cylinder (19), and the mowing device (4) is urged to the upward side separately from the mowing upper and lower cylinder (19). Auxiliary urging means (20) is provided to assist the retraction of the reaping device (4) when the housing (8B) provided at the lower part of the device (4) is pushed up by the convex part of the farm scene, and the reaping device The combine characterized in that the lowering restricting means (30) for restricting the lowest descending position of (4) is provided, and the lowest descending restricting position by the descending restricting means (30) can be changed.   The auxiliary biasing means (20) according to claim 1, wherein the auxiliary biasing means (20) includes a front-end spring mechanism (25A) having a distal end portion attached to the cutting support frame (16) side and a spring (42) inside, and a base portion as a body. A telescopic rear spring mechanism (25B) having a spring (42) mounted inside the frame (1) is provided, and includes a base portion of the front spring mechanism (25A) and a distal end portion of the rear spring mechanism (25B). Are connected to each other by an intermediate mounting shaft (26) so that it can be bent and rotated in the vertical direction, and the rear spring mechanism (25B) expands and contracts only in the front-rear direction and does not rotate in the vertical direction on the body frame (1) side. The auxiliary biasing means (20) is provided with the lowering restricting means (30), and the lowering restricting means (30) is provided inside the front end tube (40) of the rear spring mechanism (25B). Outside the base tube (41) fitted telescopically When the double nut (43) is screwed into the screw groove formed in the bottom and the cutting device (4) is lowered, the rear end of the tip tube (40) abuts on the double nut (43) so that the cutting device (4 ) Combines that are configured to restrict the descent of   The auxiliary biasing means (20) according to claim 1, wherein the auxiliary biasing means (20) includes a front-end spring mechanism (25A) having a distal end portion attached to the cutting support frame (16) side and a spring (42) inside, and a base portion as a body. A telescopic rear spring mechanism (25B) having a spring (42) mounted inside the frame (1) is provided, and includes a base portion of the front spring mechanism (25A) and a distal end portion of the rear spring mechanism (25B). Are connected to each other by an intermediate mounting shaft (26) so that it can be bent and rotated in the vertical direction, and the rear spring mechanism (25B) expands and contracts only in the front-rear direction and does not rotate in the vertical direction on the body frame (1) side. The auxiliary biasing means (20) is provided with the lowering restricting means (30), and the lowering restricting means (30) is provided inside the front end tube (40) of the rear spring mechanism (25B). Outside the base tube (41) fitted telescopically When the thread groove provided on the inner periphery of the intermediate cylinder (44) is screwed into the screw groove formed on the inner cylinder (44) and the cutting device (4) is lowered, the front end of the intermediate cylinder (44) is the mounting plate of the tip cylinder (40) The combine characterized by having set it as the structure which regulates the fall of this cutting device (4) by contact | abutting to the inner surface of (45).   In Claim 1, the said fall control means (30) is provided between the said cutting device (4) and the cutting upper and lower cylinder (19), and this fall control means (30) is provided in the said cutting support frame (16) side. A stopper (32) attached to the attachment member (31) with a shaft (33) so that the rearward protruding position can be switched, and the stopper (32) provided on the cylinder cylinder (34) side of the cutting upper and lower cylinder (19). The combine is characterized in that it comprises a contact member (35) that can be adjusted in the front-rear position and is in contact with the rearward projecting portion.

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