Harvesting Machine

Abstract

To automatically retain an opening attitude of a side cover to swing open and close around a vertical axis.SOLUTION: A harvester comprises an opening retention mechanism 4 capable of retaining a side cover 31 in an opening attitude, the side cover supported by a thresher body 30 so as to swing open and close via a vertical hinge having a vertical rotation axis y1. The opening retention mechanism 4 includes a guide stay 41 provided on one of a thresher body 30 and the side cover 31, and a guide rail 40 provided on the other thereof. One end of the guide stay 41 is pivoted so as to relatively rotationally turn around a vertical axis y2, and as the side cover 31 swings open and close, the other end 41b is engageably inserted into the guide rail 40 so as to relatively move in the guide rail 40. The guide rail 40 includes an automatic lock part 5 for automatically restricting the relative movement of the other end by applying movement resistance to the other end 41b at a specific position.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a harvester equipped with a threshing device having a threshing main body in which a handling chamber for threshing processing is formed, and a side cover that covers the handling chamber from the lateral sides. [Background technology]

[0002] An example of a harvester equipped with a threshing device having a side cover as described above is described in Patent Document 1. In this harvester, the rear end of the side cover provided on the side of the handling chamber is supported so as to be swingable about a vertical axis with respect to the threshing body in which the handling chamber is formed. By supporting the rear end of the side cover so as to be swingable about a vertical axis in this way, the side cover can be easily swung open and closed by external operation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-063022 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the harvester described above, the rear end of the side cover is supported so as to be swingable about a vertical axis, and the side cover is configured to be swingable to open and close about the vertical axis. By providing such a structure, the side cover can be opened and closed with less influence from the weight of the side cover itself, compared to a structure in which the side cover is swingable about a horizontal axis to open and close, for example, and this has the advantage that the side cover can be opened and closed easily and with less influence from the weight of the side cover itself. If the side cover can be swung open and closed about the vertical axis in this way, the open state will be maintained as long as no external force acts on the side cover, and no acting force is applied to keep the side cover in the open position. This is convenient for performing short-term maintenance and inspection work with the side cover temporarily in the open position, but if the maintenance and inspection work takes a long time, the side cover may swing to the closed side due to the influence of wind or contact with other objects, which may hinder the work. Therefore, it is possible to consider restoring a connecting rod between the threshing main body and the side cover to ensure that the side cover is kept in an open position relative to the threshing main body. However, in this case, not only is the task of attaching and detaching the connecting rod cumbersome, but there is also a risk that the task of attaching and detaching it altogether will be forgotten.

[0005] The present invention aims to automatically maintain the open position of the side cover relative to the threshing main body when the side cover is swung open and closed around the vertical axis. [Means for solving the problem]

[0006] The feature of the harvester in the present invention is that it is equipped with a threshing device having a threshing body in which a threshing chamber for threshing processing is formed and a side cover covering the lateral side of the threshing chamber, The side cover is supported so as to be swingable open and closed via a vertical hinge having a vertical rotation axis relative to the threshing body, and an open maintaining mechanism is provided that can maintain the side cover in an open position relative to the threshing body, The open maintaining mechanism includes a guide stay provided on one of the threshing body and the side cover, and a guide rail portion provided on the other of the threshing body and the side cover, One end of the guide stay is pivotally supported on the one side so as to be relatively rotatable about a vertical axis, and the other end of the guide stay is engaged with the guide rail portion so as to move relatively within the guide rail portion in response to the swinging opening and closing operation of the side cover, The guide rail portion is provided with an automatic lock portion that applies a movement resistance to the other end portion guided by the guide rail portion at a specific position to automatically limit the relative movement of the other end portion. R, The vertical hinge comprises a fixed bracket provided on the threshing body, a connecting bracket provided on the side cover, and a support shaft that connects the fixed bracket and the connecting bracket so as to be relatively rotatable around the rotation axis; The guide rail portion is provided on the fixed bracket, The one end is pivotally supported on the connecting bracket. This is what is happening.

[0007] According to the present invention, when the side cover in the closed position is swung toward the open side, the other end of the guide stay engaged in the guide rail portion moves within the guide rail portion. When the other end of the guide stay reaches a specific position within the guide rail portion, the automatic locking portion restricts the relative movement of the guide stay, and the opening and closing operation of the side cover is automatically prevented.

[0008] Therefore, even if the user does not think about locking the side cover in the open position when opening the side cover, the side cover is automatically locked in the open position when it reaches a specific position. This eliminates the need for bothersome operations to keep the side cover in the open position, and also makes it easy to avoid problems caused by forgetting to operate the side cover. Furthermore, with this configuration, the fixed bracket, which is a component of the vertical hinge, can be utilized as a target component for forming the guide rail portion, and the connecting bracket can be utilized as a support member for the guide stay. Therefore, there is no need to provide separate support members for the guide rail portion or the guide stays, which makes it easier to reduce the number of parts and costs.

[0009] In the present invention, the guide rail portion is formed by a long hole that guides the other end portion, The guide stay is formed of a rod-shaped member, It is preferable that the automatic locking portion comprises a large diameter hole portion at the end of the long hole, which is formed wider than the guide width of the long hole, and a large diameter portion provided at the other end side portion of the guide stay, which has a diameter larger than the guide width and is capable of being inserted and removed from the large diameter hole portion.

[0010] According to this configuration, a large diameter hole portion that is wider than the guide width of the long hole is formed at the end of the long hole, and the automatic locking portion can be configured with a simple structure in which the other end of the guide stay automatically drops in.

[0011] In the present invention, it is preferable that the end of the long hole closer to the vertical axis is located closer to the rotation axis than the end of the long hole farther from the vertical axis.

[0012] According to this configuration, during the opening operation of the side cover, the position of the vertical axis at one end of the guide stay is on an arc with the rotation axis of the vertical hinge as the center of curvature, i.e., the distance from the rotation axis of the vertical hinge is always constant. In contrast, the other end of the guide stay, which moves within the long hole of the guide rail part, moves relatively within the guide rail part from the end farther from the rotation axis of the vertical hinge to the end closer to the rotation axis of the vertical hinge as the side cover moves from the closed position to the open side. At this time, the distance from the rotation axis of the vertical hinge to the other end of the guide stay changes so that it approaches the rotation axis of the vertical hinge as the side cover moves from the closed position to the open side, that is, so that the turning radius of the other end becomes shorter as it approaches the open side. As a result, the amount of swinging movement of the side cover per rotation angle of the other end of the guide stay can be made larger than when the rotation radius of the other end of the guide stay remains long. This allows the side cover to be opened widely in relation to the length of the long hole, making it easy to obtain an open-maintaining mechanism with a compact structure.

[0013] In the present invention, the long hole is aligned with the rotation axis of the vertical hinge. bend away from It is preferable that the hole be an arc-shaped slot.

[0014] With this configuration, the operation of the other end of the guide stay, which moves relatively within the guide rail portion in response to the opening operation of the side cover, is likely to be smooth with relatively little increase or decrease in movement resistance, compared to when the guide rail portion is straight, for example.

[0015]

[0016]

[0017] In the present invention, the guide rail portion is formed by a long hole that guides the other end portion, the long hole is an arc-shaped long hole having a center of curvature on the rotation axis side of the vertical hinge, It is preferable that the fixed bracket has a recessed portion formed to allow a portion of the base end portion of the side cover, when operated to the open position, to enter between the rotation axis of the vertical hinge and the threshing body.

[0018] With this configuration, a recess is formed between the rotation axis of the vertical hinge and the threshing body, allowing part of the side cover that has been operated to the open position to enter, making it easy to open the side cover wide.

[0019] In the present invention, it is preferable that the recessed portion is formed closer to a center of curvature of the arc-shaped slot than a location where the arc-shaped slot is provided.

[0020] According to this configuration, the recessed portion is formed on the side of the guide rail portion facing the recessed portion in the curved portion of the arc-shaped slot, not on the side facing the protruding portion in the curved portion of the arc-shaped slot. Therefore, even if the depth of the recess is made relatively deep, it is possible to avoid the recess being too close to the guide rail portion, and it is easy to form the recess while avoiding a significant decrease in the strength of the vertical hinge. [Brief description of the drawings]

[0021] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. 4 is a left side view showing the attachment location of the side cover. [Figure 4] FIG. 4 is a rear view showing the attachment locations of the side covers. [Diagram 5] FIG. 4 is a plan view showing the attachment location of the dust exhaust cover. [Figure 6] FIG. 13 is an explanatory diagram showing an open maintaining mechanism. [Figure 7] FIG. 13 is an explanatory diagram showing an open maintaining mechanism. [Figure 8] FIG. 13 is a plan view illustrating the open-maintaining mechanism. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an example of an embodiment of a harvester according to the present invention will be described with reference to the drawings. In addition, unless otherwise specified, the front-rear direction and the left-right direction in the description of this embodiment are described as follows: In other words, the forward traveling direction (see arrow F in Fig. 1) when a harvester to which the present invention is applied is traveling for work is "forward", the backward traveling direction (see arrow B in Fig. 1) is "rear", the direction corresponding to the right side based on the forward posture in the front-rear direction (see arrow R in Fig. 2) is "right", and similarly the direction corresponding to the left side (see arrow L in Fig. 2) is "left".

[0023] [Overall structure] Fig. 1 shows the overall side view of a normal combine harvester, which is an example of a harvester according to the present invention. Fig. 2 shows a pre-harvesting processing section 2 mounted on the front of the combine harvester. In this combine harvester, the pre-harvesting processing section 2 is disposed on the front of a traveling body 1 equipped with a pair of left and right crawler traveling devices 10. A threshing device 3 and a grain recovery section 12 are provided side by side on the left and right sides on the traveling body 1. A dust discharge cover 11 is provided behind the threshing device 3. A driver's section 13 is provided in front of the grain recovery section 12. A driver's seat 13a provided in the driver's section 13 is provided above an engine bonnet 15 that houses an engine 14.

[0024] A feeder 16 for transporting harvested cereals is connected to the front of the threshing device 3. The rear end of the feeder 16 is supported so as to be able to swing up and down about a horizontal axis (not shown) provided near the front of the threshing device 3, and the front end is connected to the rear of the pre-harvesting processing section 2, which has a cutting width approximately equivalent to the width of the machine body.

[0025] The pre-cutting treatment section 2 has a structure in which a clipper-type cutting device 2B and an auger 2C that sends the cut crops laterally to the middle of the cutting width are installed across a pair of left and right grass dividing frames 2A. A raking reel 2D is installed at the top of the front of the pre-harvesting processing section 2, which raks the planted culms backward and pulls them up. The raking reel 2D raks the tips of the culms planted in the field backward while the cutting device 2B cuts them, and the cut crop is collected in the left-right center by the auger 2C. The collected crop is delivered to the feeder 16 and sent to the whole-culm input threshing device 3 at the rear.

[0026] The take-in reel 2D is supported via a support bracket 18 (corresponding to a support frame) on the front of a pair of left and right support arms 17 which are vertically swingable about a horizontal fulcrum Pa. The support bracket 18 is fitted onto the support arm 17 so as to be slidable back and forth along the longitudinal direction of the support arm 17, and the support bracket 18 supports a rotating shaft 22 of the pick-up reel 2D. Therefore, the take-in reel 2D can adjust the take-in action position forward or backward by sliding the support bracket 18 along the longitudinal direction of the support arm 17. The support bracket 18 can be manually slid, and is configured so that it can be fixed in position by pin connections or the like at multiple points forward and backward in the sliding direction. In addition, the hydraulic cylinder 19 can be used to swing the support arm 17 up and down to change the pick-up action height of the pick-up reel 2D.

[0027] An input pulley 21 is attached to the right end of the rotating shaft 22 of the take-in reel 2D. A driving force is transmitted from the engine 14 on the traveling machine body to the rotating shaft 22 of the take-in reel 2D via a transmission belt 20 stretched around the input pulley 21.

[0028] [Threshing device] The threshing device 3 is equipped with a box-shaped threshing body 30 that forms a threshing chamber 3A inside. Inside the threshing body 30, a threshing drum 3B that threshes the crops (grains) delivered from the feeder 16, and a sorting device (not shown) that sorts the threshed crops are arranged. The harvested crops sorted by the sorting device are sent to and collected in the grain recovery section 12. Uncollected dust and uncollected materials such as straw are discharged from the handling chamber 3A through a dust exhaust passage covered by a dust exhaust cover 11 at the rear to the outside of the machine.

[0029] As shown in Figures 1, 3, and 4, the threshing body 30 of the threshing device 3 is provided with a side cover 31 that is located on the left side of the handling chamber 3A in a closed position and that forms the lateral wall of the handling chamber 3A, thereby enabling the inside of the handling chamber 3A to be opened to the outside. This side cover 31 comprises an upper side cover 31A which is arranged to be able to swing left and right around a vertical rotation axis y1 provided at the rear, an upper front side cover 31B which is connected in an engaged state to an engagement portion (not shown) formed on the threshing main body 30 on the front side of the upper side cover 31A, and lower side covers 31C, 31C which are connected in an engaged state to engagement portions (not shown) formed on the threshing main body 30 on the lower side of the upper side cover 31A and upper front side cover 31B.

[0030] The upper side cover 31A is provided so that an opening formed in the side part of the handling chamber 3A can be opened and closed to perform maintenance around the handling drum 3B. The opening formed in the side part of the handling chamber 3A has a front-to-back and top-to-bottom opening range set so that when it is open, all or most of the sides of the handling drum 3B and the receiving net 3C are exposed to the side. The upper front side cover 31B is for opening and closing an opening formed on the side of the rear end of the feeder 16 to facilitate inspection, and the opening formed on the side of the rear end of the feeder 16 is set to a size appropriate for inspecting the rear end portion of the feeder 16. The lower side covers 31C, 31C are for opening and closing an opening formed on the side of the sorting device to facilitate inspection, and the opening formed on the side of the sorting device has an opening range set to a size appropriate for inspecting the sorting device portion.

[0031] The upper side cover 31A is integrally formed with an outer cover body 31Aa located at the outermost position and an inner cover body 31Ab located at the innermost position facing the handling chamber 3A, and is supported on the rear end of the threshing body 30 via a vertical hinge 32 having a vertical rotation axis y1 so that the entire cover can be swung open and closed. A pull-handle fitting 33 is provided on the end of the upper side cover 31A farther from the rotation axis y1, and by hooking a finger on the pull-handle fitting 33 and pulling it, the upper side cover 31A can be swung around the rotation axis y1 to open it.

[0032] The vertical hinge 32 supporting the upper side cover 31A comprises a fixed bracket 34 welded to the threshing body 30, a support shaft 35 fixed to the fixed bracket 34, and a connecting bracket 36 fixed to the upper side cover 31A, as shown in Figures 3 and 4. The connecting bracket 36 is formed with a pivot hole (not shown) through which the support shaft 35 can be inserted. By fitting the support shaft 35 onto the outside of this pivot hole, the upper side cover 31A is supported so as to be swingable about the vertical rotation axis y1 which is the axis of the support shaft 35. The combination of the fixed bracket 34, the support shaft 35, and the connecting bracket 36 is provided at two locations, one above and one below, in the narrow space S1 at the rear end of the upper side cover 31A, and supports the upper side cover 31A so that it can swing around a common rotation axis y1. The narrow space S1 is a space formed in the left-right direction at the rear of the upper side cover 31A between the outer surface of the threshing body 30 and the inner surface of the outer cover body 31Aa of the upper side cover 31A, and has a width in the left-right and front-rear directions that can accommodate the vertical hinge 32. The left-right width of this narrow space S1 is configured to be approximately equal to or less than the left-right thickness of the upper side cover 31A, and is set so that it is not necessary to increase the left-right thickness of the upper side cover 31A to form the narrow space S1.

[0033] At the end of the upper side cover 31A farther from the rotation axis y1, the threshing body 30 is provided at a position opposite to the location where the pull fitting 33 is provided with a well-known locking member (not shown) that can be engaged with and disengaged from the pull fitting 33. When the upper side cover 31A is in the closed position, the pull fitting 33 engages with the locking member to maintain the closed position. When the pull handle fitting 33 is pulled from the closed position, the engagement point of the pull handle fitting 33 disengages from the locking member, and the upper side cover 31A swings toward the opening side around the rotation axis y1, opening the handling chamber 3A inside the threshing main body 30 to the outside.

[0034] [Opening maintenance mechanism] The threshing device 3 is provided with an open maintaining mechanism 4 capable of maintaining the above-mentioned upper side cover 31A in an open position relative to the threshing main body 30. The open maintaining mechanism 4 is composed of a guide stay 41 provided on one of the threshing main body 30 and the side cover 31, and a guide rail portion 40 provided on the other of the threshing main body 30 and the side cover 31. As shown in Figures 3 to 8, in the embodiment, a guide rail portion 40 is provided on the threshing body 30, and a rod-shaped guide stay 41 bent into a gate shape is pivoted at one end 41a relative to the upper side cover 31A around the vertical axis y2 so as to be freely rotatable relative to the upper side cover 31A, and the other end 41b is inserted into the guide rail portion 40.

[0035] The guide rail portion 40 is constituted by an arc-shaped long hole formed on the upper surface of the fixing bracket 34 of the lower vertical hinge 32 of the vertical hinges 32 provided at two positions, upper and lower. The fixing bracket 34 of the lower vertical hinge 32 also serves as a mounting member for the guide rail portion 40. The arc-shaped long hole that constitutes the guide rail portion 40 has a guide width w1 that is slightly larger than the outer diameter d1 of the other end 41b of the rod-shaped guide stay 41 so that the other end 41b of the guide stay 41 can move relatively along the long hole when the other end 41b of the guide stay 41 is inserted into the long hole (see Figures 6 and 8).

[0036] The arc of the long hole in the guide rail portion 40 is formed in an arc shape that bends in a direction away from the support shaft 35 of the vertical hinge 32, rather than in a direction toward the support shaft 35 of the vertical hinge 32, with respect to the imaginary line segment connecting both ends of the long hole. In other words, as shown in FIG. 8, the arc of the long hole in this guide rail portion 40 is not the same as the arc whose center of curvature is the rotation axis y1 of the vertical hinge 32, but is an arc-shaped long hole that follows that arc.

[0037] More precisely, the arc-shaped long hole of the guide rail portion 40 is formed so that the end portion 40b closer to the vertical axis y2 of one end portion 41a of the guide stay 41 is positioned closer to the rotation axis y1 of the vertical hinge 32 than the end portion 40a farther from the vertical axis y2 at the one end portion 41a of the guide stay 41. As shown in Figure 8, the arc-shaped long hole formed in this manner has a smaller radius of a virtual arc r2 passing through the end 40b closer to the vertical axis y2 than the radius of a virtual arc r1 passing through the end 40a farther from the vertical axis y2 around the rotation axis y1 of the vertical hinge 32. That is, the arc-shaped long hole of the guide rail portion 40 is inclined so that the radius of curvature around the rotation axis y1 of the vertical hinge 32 becomes smaller from the end 40a farther from the vertical axis y2 at one end 41a of the guide stay 41 to the end 40b closer to the vertical axis y2. This arc-shaped long hole is formed along a virtual arc r3 different from the virtual arcs r1 and r2 around the rotation axis y1 of the vertical hinge 32, and the center of curvature y3 of the virtual arc r3 is present in a recessed portion 37 described later at a position different from the rotation axis y1 of the vertical hinge 32 as shown in FIG.

[0038] In this way, the arc-shaped long hole of the guide rail portion 40 is arranged so that the radius of curvature around the rotation axis y1 of the vertical hinge 32 becomes smaller the closer it is to the end 40b at one end 41a of the guide stay 41 that is closer to the vertical axis y2, so that the range of swinging movement of the upper side cover 31A per swing angle of the other end 41b of the guide stay 41 around the rotation axis y1 of the vertical hinge 32 can be made larger in proportion to the length of the arc-shaped long hole of the guide rail portion 40. As a result, as shown in Figure 8, the rotation angle Θ2 by which one end 41a of the guide stay 41 moves around the rotation axis y1 of the vertical hinge 32 during movement of the guide stay 41 is larger than the angle Θ1 by which the other end 41b of the guide stay 41 moves within the guide rail section 40 around the rotation axis y1 of the vertical hinge 32.

[0039] As described above, when the guide rail portion 40 is formed along an arc whose center of curvature is the rotation axis y1 of the vertical hinge 32, the movement resistance during relative movement between the guide rail portion 40 and the other end portion 41b of the guide stay 41 which moves while rotating around the rotation axis y1 of the vertical hinge 32 is relatively small. Furthermore, by making the rotation angle Θ2 when one end 41a of the guide stay 41 moves around the rotation axis y1 of the vertical hinge 32 larger than the angle Θ1 when the other end 41b of the guide stay 41 moves within the guide rail section 40 around the rotation axis y1 of the vertical hinge 32, the upper side cover 31A can be opened widely relative to the length of the arc-shaped long hole in the guide rail section 40.

[0040] [Automatic locking section] The guide rail portion 40 is provided with an automatic lock portion 5 for automatically stopping the opening and closing operation of the upper side cover 31A when the upper side cover 31A is opened to a specific position. This automatic locking section 5 includes a large diameter hole 50 provided in the end 40b of one end 41a of the guide stay 41, which is closer to the vertical axis y2, in the arc-shaped long hole of the guide rail section 40, and a guide stay 41 configured to be able to drop into the large diameter hole 50.

[0041] 6 and 7, the guide stay 41 is formed into a gate shape by bending both ends of a rod-shaped member in the same direction. The rod-shaped member is a round bar, and its diameter d2 is formed slightly larger than the outer diameter d1 of the other end 41b of the guide stay 41 and the guide width w1 of the guide rail portion 40 that guides the other end 41b. 6, in the region where the other end 41b is guided in the arc-shaped long hole of the guide rail portion 40, the other end 41b of the guide stay 41 is guided in a state where it is inserted within the guide width w1 of the guide rail portion 40. At this time, the rod-shaped member continuing above the other end 41b of the guide stay 41 has a portion (corresponding to a large diameter portion) having a diameter d2 larger than the outer diameter d1 of the other end 41b located above the arc-shaped long hole of the guide rail portion 40 and on the upper surface side of the fixed bracket 34.

[0042] When the other end 41b of the guide stay 41 reaches the end 40b of the guide rail section 40 closer to the vertical axis y2 at one end 41a of the guide stay 41, a large diameter hole 50 is formed in the end 40b, which is large enough to fit a rod-shaped member having a diameter d2 larger than the outer diameter d1 of the other end 41b of the guide stay 41. Therefore, when the other end 41b of the guide stay 41 reaches the end 40b of the guide rail section 40 closer to the vertical axis y2 of the guide stay 41, as shown in Figure 7, a rod-shaped member having a diameter d2 larger than the outer diameter d1 of the other end 41b of the guide stay 41 fits into the large diameter hole 50, automatically stopping the opening and closing operation of the upper side cover 31A.

[0043] One end 41a of the guide stay 41 is inserted into a support hole 36a provided in a connection bracket 36 fixed to the upper side cover 31A. The support hole 36a is formed to be somewhat larger than the diameter d2 of the guide stay 41. In other words, as shown in Fig. 7, when a rod-shaped member having a diameter d2 larger than the outer diameter d1 of the other end 41b of the guide stay 41 is fitted into the large diameter hole 50, the vertical axis y2 is allowed to tilt slightly on the one end 41a side of the guide stay 41, making it easier for the rod-shaped member to fit into the large diameter hole 50.

[0044] The guide stay 41 has flanges 40c, 40c welded to limit the range of fitting of each end. In addition, beta pins 40d, 40d for preventing the guide stay 41 from coming out are detachably provided at the ends of the guide rail portion 40 and the portions inserted into the support holes 36a. To operate the upper side cover 31A, which is maintained in the open position, toward the closed side, the guide stay 41, which is in the position shown in Fig. 7, is manually lifted slightly so that the other end 41b of the guide stay 41 comes out of the large diameter hole 50, and the upper side cover 31A is moved slightly toward the closed side. This brings the other end 41b into a state inserted within the guide width w1 of the guide rail portion 40 as shown in Fig. 6, and the upper side cover 31A can be manually operated toward the closed side.

[0045] [Dust exhaust cover] As shown in Figures 1, 2, and 5, a dust cover 11 is provided at the rear of the threshing device 3 to suppress the scattering of dust, straw dust, etc. discharged from the threshing device 3 and guide them to the outside of the machine at the rear and lower part, where they fall and are released. This dust cover 11 is formed as a single piece from synthetic resin and is attached to the rear of the threshing body 30. When attaching the dust cover 11 to the rear of the threshing body 30, the elasticity of the dust cover 11, which is made of synthetic resin, is utilized to spread the front part 11a and attach it so as to embrace the threshing body 30 from the left and right, and the dust cover 11 is then fixedly connected with a connecting bolt 11b.

[0046] At the rear of the threshing body 30, where the dust cover 11 is attached, a fixed bracket 34 having the aforementioned guide rail portion 40 and an upper side cover 31A are provided via a vertical hinge 32 having a connecting bracket 36. At this time, a recess 37 is formed in the fixed bracket 34 to prevent a part of the upper side cover 31A, which opens and closes around the support shaft 35, from interfering with the dust exhaust cover 11, the connecting bolt 11b, etc. when it opens and closes around the rotation axis y1 of the vertical hinge 32.

[0047] This recessed portion 37 is formed on the side closer to the center of curvature y3 of the arc-shaped long hole in the guide rail portion 40 than the point where the guide rail portion 40 is provided on the fixed bracket 34, so that by effectively utilizing the curved shape of the guide rail portion 40, the recessed portion 37 can be formed so as to be recessed deeply in the front-to-rear direction so as to be as close as possible to the guide rail portion 40. By forming the recess 37 deep in this manner, when a part of the upper side cover 31A is opened or closed around the rotation axis y1 of the vertical hinge 32, a part of the base end of the upper side cover 31A can be allowed to smoothly fit between the rotation axis y1 of the vertical hinge 32 and the threshing main body 30.

[0048] [Another embodiment] Other embodiments will be described below. The following embodiments may be used in combination unless a contradiction occurs. The scope of the present invention is not limited to the contents of these embodiments.

[0049] (1) In the above-described embodiment, the guide rail portion 40 is formed by an arc-shaped long hole, but this is not necessarily limited to this structure. For example, the guide rail portion 40 is not limited to an arc shape, but may be linear or have any curved shape. The other configurations may be the same as those of the above-described embodiment.

[0050] (2) In the above-described embodiment, the guide rail portion 40 is formed by a long hole, but this is not necessarily limited to this structure. For example, the guide rail portion 40 may be a groove or may be formed using a rod-shaped rail member. The other configurations may be the same as those of the above-described embodiment.

[0051]

[0052]

[0053] ( 3 In the above embodiment, a structure in which the automatic locking portion 5 is provided at one end of the guide rail portion 40 has been illustrated, but the present invention is not necessarily limited to this structure. For example, the automatic locking portion 5 may be provided not only at one end of the guide rail portion 40, but also at a plurality of locations. The other configurations may be the same as those of the above-described embodiment.

[0054] ( 4 In the above-described embodiment, an example was given of a structure in which the automatic locking portion 5 is formed by combining the large diameter hole 50 and the guide stay 41, but this structure is not necessarily limited to this, and any locking structure can be adopted, such as using a spring-loaded clamping member at a specific position. The other configurations may be the same as those of the above-described embodiment.

[0055] ( 5In the above-described embodiment, an example was given of an arc-shaped long hole in the guide rail portion 40 having a structure in which the radius of curvature on one end side is smaller than the radius of curvature on the other end side, but this structure is not necessarily limited to this and, for example, the radius of curvature may be constant. The other configurations may be the same as those of the above-described embodiment.

[0056] ( 6 In the above embodiment, the open-retention mechanism 4 is provided at the rear of the upper side cover 31A among the side covers 31, but the present invention is not limited to this structure. For example, the open-retention mechanism 4 may be provided at the front of the upper side cover 31A, or may be provided at the upper front side cover 31B or the lower side cover 31C instead of the upper side cover 31A. The other configurations may be the same as those of the above-described embodiment.

[0057] ( 7 In the above-described embodiment, the upper side cover 31A shown as an example of the side cover 31 has a structure in which the outer cover body 31Aa located at the outermost position and the inner cover body 31Ab located at the innermost position facing the treatment chamber 3A are integrally formed, but this structure is not necessarily required, and the outer cover body 31Aa may be configured to be swingable open and closed separately from the inner cover body 31Ab. The other configurations may be the same as those of the above-described embodiment. [Industrial Applicability]

[0058] The present invention is applicable not only to normal type combine harvesters but also to head-feeding type combine harvesters. Furthermore, the present invention can be applied to harvesters for various crops, not limited to rice, wheat, etc. [Explanation of symbols]

[0059] 3. Threshing equipment 4 Opening maintenance mechanism 5 Automatic locking section 30 Threshing unit 31 Side cover 32 Vertical hinge 34 Fixing bracket 35 Spindle 36 Connecting bracket 37 Recessed 40 Guide rail section 41 Guide stay 41a One end 41b Other end 50 Large diameter hole y1 Rotation axis center y2 Vertical axis center y3 center of curvature w1 Guide width

Claims

1. A threshing device is provided having a threshing body in which a threshing chamber for threshing processing is formed and a side cover covering the lateral side of the threshing chamber, The side cover is supported so as to be swingable open and closed via a vertical hinge having a vertical rotation axis relative to the threshing body, and an open maintaining mechanism is provided that can maintain the side cover in an open position relative to the threshing body, The open maintaining mechanism includes a guide stay provided on one of the threshing body and the side cover, and a guide rail portion provided on the other of the threshing body and the side cover, One end of the guide stay is pivotally supported on the one side so as to be relatively rotatable about a vertical axis, and the other end of the guide stay is engaged with the guide rail portion so as to move relatively within the guide rail portion in response to the swinging opening and closing operation of the side cover, The guide rail portion is provided with an automatic lock portion that applies a movement resistance to the other end portion guided by the guide rail portion at a specific position to automatically limit the relative movement of the other end portion, The vertical hinge comprises a fixed bracket provided on the threshing body, a connecting bracket provided on the side cover, and a support shaft that connects the fixed bracket and the connecting bracket so as to be relatively rotatable around the rotation axis; The guide rail portion is provided on the fixed bracket, A harvester, said one end of which is pivotally supported on said connecting bracket.

2. The guide rail portion is formed by a long hole that guides the other end portion, The guide stay is formed of a rod-shaped member, The harvester described in claim 1, wherein the automatic locking portion comprises a large diameter hole portion at the end of the long hole which is formed wider than the guide width of the long hole, and a large diameter portion provided at the other end side portion of the guide stay, which has a diameter larger than the guide width and can be inserted and removed from the large diameter hole portion.

3. A harvester as described in claim 2, wherein the end of the long hole closer to the vertical axis is located closer to the rotation axis than the end of the long hole farther from the vertical axis.

4. 3. The harvester according to claim 2, wherein said long hole is an arc-shaped long hole that curves away from the rotation axis of said vertical hinge.

5. The guide rail portion is formed by a long hole that guides the other end portion, the long hole is an arc-shaped long hole having a center of curvature on the rotation axis side of the vertical hinge, A harvester as described in claim 1, wherein the fixed bracket has a recessed portion that allows a portion of the base end portion of the side cover, when operated to the open position, to enter between the rotation axis of the vertical hinge and the threshing body.

6. The harvester according to claim 5 , wherein the recess is formed on a side closer to a center of curvature of the arc-shaped slot than a location where the arc-shaped slot is provided.

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