JP2023170464A - harvester - Google Patents

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

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 side.

As a harvester equipped with a threshing device having a side cover as described above, for example, there is one described in Patent Document 1.
In this harvester, the rear end of the side cover provided on the lateral side of the handling chamber is supported so as to be swingable about the vertical axis relative to the threshing body in which the handling chamber is formed. In this way, by supporting the rear end portion of the side cover so as to be able to swing around the vertical axis, the side cover can be easily opened and closed by swinging from the outside.

JP2013-063022A

In the above-mentioned harvester, the rear end portion of the side cover is supported so as to be swingable about the vertical axis, and the side cover is configured to be able to swing open and close about the vertical axis. By having such a structure, for example, compared to a structure in which the side cover is opened and closed by swinging around the horizontal axis, when the side cover is opened and closed, the side cover itself is This is advantageous in that it can be operated with little influence from weight, and the side cover can be easily opened and closed.
If the side cover can be opened and closed by swinging around the vertical axis in this way, no external force will be applied to the side cover even if no force is applied to maintain the open position of the side cover. Otherwise, it will remain open. For this reason, it is convenient to temporarily leave the side cover in the open position for very short maintenance and inspection work, but if the maintenance and inspection work is prolonged, the side cover may be affected by the wind. If it swings toward the closed side due to contact with other objects, there is a risk that it will interfere with work.
Therefore, it is possible to securely maintain the open position of the side cover with respect to the threshing body by passing a connecting rod between the threshing body and the side cover, but in this case, the connecting rod Not only is the attachment/detachment work troublesome, but there is also the risk of forgetting the attachment/detachment work itself.

The present invention is intended to automatically maintain the open posture of the side cover relative to the threshing body when the side cover swings open and close around the vertical axis.

The harvesting machine of the present invention is characterized by being 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 lateral side of the handling chamber,
The side cover is supported so as to be able to swing open and close relative to the threshing body via a vertical hinge having a vertical axis of rotation, and the side cover can be maintained in an open position with respect to the threshing body. Equipped with an open maintaining mechanism,
The opening maintaining mechanism includes a guide stay provided on one of the threshing main body and the side cover, and a guide rail section provided on the other of the threshing main body and the side cover,
One end of the guide stay is pivoted to the one side so as to be relatively rotatable around an up-down axis, and the other end of the guide stay is rotated within the guide rail portion relative to each other as the side cover swings open and close. is movably engaged with the guide rail portion,
The guide rail section is provided with an automatic lock section that applies movement resistance at a specific position to the other end guided by the guide rail section and automatically limits relative movement of the other end. be.

According to the present invention, when the side cover that has been in the closed position is swung toward the open side, the other end of the guide stay that has been 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 section, the relative movement of the guide stay is restricted by the automatic lock section, and the opening/closing operation of the side cover is automatically blocked.

Therefore, when opening the side cover, even if you are not conscious of locking it in the open position, the side cover will automatically lock in the open position as soon as it reaches a specific position. . Therefore, there is no need for troublesome operations to maintain the side cover in the open position, and it is easy to avoid problems caused by forgetting to operate.

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 by a rod-shaped member,
The automatic locking portion is provided at an end of the elongated hole in a large diameter hole portion that is wider than the guide width of the elongated hole, and in a portion of the guide stay on the other end side, and It is preferable to include a large-diameter portion having a diameter larger than the guide width and capable of being inserted into and removed from the large-diameter hole.

According to this configuration, a large-diameter hole portion that is wider than the guide width of the elongated hole is formed at the end of the elongated hole, and the other end of the guide stay is automatically depressed. The structure can constitute an automatic locking part.

In the present invention, an end of the long hole that is closer to the vertical axis is located closer to the rotation axis than an end of the long hole that is farther from the vertical axis. Then, it is suitable.

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 the circular arc with the rotation axis of the vertical hinge as the center of curvature, that is, the rotation axis of the vertical hinge The distance from is always constant.
On the other hand, the other end of the guide stay that moves within the elongated hole of the guide rail section moves within the elongated hole of the guide rail section with the rotation of the vertical hinge as the side cover is opened from the closed position. It moves relatively within the guide rail portion from the end farthest from the axis toward the end near the rotation axis of the vertical hinge. At this time, the distance from the rotation axis of the vertical hinge to the other end of the guide stay is such that the closer the side cover is from the closed position to the open side, the closer it is to the rotation axis of the vertical hinge, that is, the closer the side cover is to the open side. The radius of rotation at the other end changes as it approaches.
As a result, the amount of rocking motion 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. As a result, the side cover can be opened wide compared to the length of the elongated hole, and the opening maintaining mechanism can be easily obtained with a compact structure.

In the present invention, it is preferable that the elongated hole is an arc-shaped elongated hole extending along an arc centered on the rotation axis of the vertical hinge.

According to this configuration, the movement of the other end of the guide stay, which moves relatively within the guide rail section as the side cover is opened, is relatively difficult to move compared to a case where the guide rail section is linear. It is easy to carry out smoothly with little increase/decrease change in .

In the present invention, the vertical hinge is capable of relatively rotating a fixed bracket provided on the threshing body, a connection bracket provided on the side cover, and the fixed bracket and the connection bracket about the rotation center. A support shaft connected to the
the guide rail portion is provided on the fixed bracket,
Preferably, the one end portion is pivotally supported on the connection bracket.

According to this configuration, the fixed bracket, which is a component of the vertical hinge, can be used as a member for forming the guide rail portion, and the connection bracket can be used as a support member for the guide stay.
Therefore, there is no need to separately provide a support member for the guide rail portion or the guide stay, and it is easy to reduce the number of parts and reduce costs.

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,
A recessed portion is formed in the fixed bracket to allow a part of the proximal end portion of the side cover operated in the open position to enter between the rotation axis of the vertical hinge and the threshing body. It is preferable if

According to this configuration, a recessed portion is formed between the rotation axis of the vertical hinge and the threshing body to allow a part of the side cover operated in the open position to enter, so that the side cover Easy to open wide.

In the present invention, it is preferable that the recessed portion is formed closer to the center of curvature of the arc-shaped elongated hole than the location where the arc-shaped elongated hole is provided.

According to this configuration, the recessed portion is formed on the side of the guide rail portion that faces the recessed portion in the curved portion of the arcuate long hole, rather than on the side opposite to the protruding portion in the curved portion of the arcuate long hole. ing.
Therefore, even if the depth of the recessed portion is made relatively large, it is easy to form the recessed portion without getting too close to the guide rail portion, thereby avoiding a significant decrease in strength of the vertical hinge.

It is a left side view of a combine. It is a top view of a combine. FIG. 6 is a left side view showing the attachment location of the side cover. FIG. 6 is a rear view showing the attachment location of the side cover. FIG. 3 is a plan view showing the attachment location of the dust exhaust cover. It is an explanatory view showing an open maintenance mechanism. It is an explanatory view showing an open maintenance mechanism. FIG. 3 is an explanatory plan view showing the opening maintaining mechanism.

EMBODIMENT OF THE INVENTION Hereinafter, an example of embodiment concerning the harvester of this invention is demonstrated based on description of a drawing.
Note that the front-rear direction and left-right direction in the description of this embodiment are described as follows unless otherwise specified. In other words, when the harvester to which the present invention is applied is running for work, the forward direction of movement (see arrow F in FIG. 1) is "front", and the direction of movement to the backward direction (see arrow B in FIG. 1) is "rear". , the direction corresponding to the right side (see arrow R in Fig. 2) with respect to the forward facing posture in the front and back direction as a reference is "right", and the direction corresponding to the left side (see arrow L in Fig. 2) is "left". be.

〔overall structure〕
FIG. 1 shows an overall side view of a conventional combine harvester, which is an example of a harvester according to the present invention. FIG. 2 shows a pre-reaping treatment section 2 installed at the front of the combine harvester. In this combine harvester, a reaping pre-processing section 2 is disposed at the front of a traveling body 1 including a pair of left and right crawler traveling devices 10.
On the traveling body 1, a threshing device 3 and a grain collecting section 12 are provided side by side in parallel. A dust exhaust cover 11 is provided behind the threshing device 3. A driving section 13 is arranged in front of the grain collecting section 12. A driver's seat 13a provided in the driver's section 13 is provided above an engine bonnet 15 in which the engine 14 is housed.

A feeder 16 for conveying cut grain culms is connected to the front part of the threshing device 3. The rear end side of the feeder 16 is supported so as to be able to swing up and down around a horizontal axis (not shown) provided near the front of the threshing device 3, and the front end side is a mowing machine having a cutting width approximately corresponding to the width of the machine body. It is connected to the rear part of the preprocessing section 2.

The reaping pre-processing section 2 has a structure in which a clipper-type cutting device 2B and an auger 2C for horizontally feeding the reaped crops to the middle of the cutting width are installed over a pair of left and right grass dividing frames 2A.
A raking reel 2D for raking the planted grain culm backwards and pulling it up is installed above the front part of the pre-harvesting processing section 2. The tip side of the grain culm to be planted in the field is raked backwards with this raking reel 2D while being reaped with a cutting device 2B, and the cut crop is collected in the center side in the left-right direction with an auger 2C. The collected crops are delivered to the feeder 16 and sent to the entire culm-throwing type threshing device 3 at the rear.

The scraping reel 2D is supported via a support bracket 18 (corresponding to a support frame) at the front portions of a pair of left and right support arms 17 that are vertically swingable around a horizontal fulcrum Pa.
The support bracket 18 is fitted onto the outside of the support arm 17 so as to be slidable back and forth along the longitudinal direction, and the rotation shaft 22 of the scraping reel 2D is supported by the support bracket 18. Therefore, in the scraping reel 2D, the scraping action position can be adjusted back and forth by sliding the support bracket 18 along the longitudinal direction of the support arm 17. The support bracket 18 can be slid manually, and is configured to be fixed in position by connecting pins or the like at a plurality of locations in the front and back of the sliding direction.
Further, by vertically swinging the support arm 17 using the hydraulic cylinder 19, the scraping action height of the scraping reel 2D can be changed.

An input pulley 21 is attached to the right end of the rotating shaft 22 of the scraping reel 2D. Driving force is transmitted from the engine 14 on the traveling machine to the rotating shaft 22 of the scraping reel 2D via the transmission belt 20 stretched around the input pulley 21.

[Threshing device]
The threshing device 3 includes a box frame-shaped threshing main body 30 that forms a handling chamber 3A for threshing processing inside. Inside the threshing main body 30, a handling cylinder 3B for threshing the crops (grains) delivered from the feeder 16, a sorting device (not shown) for sorting the threshed crops, and the like are arranged. .
The collected crops sorted by the sorting device are sent to a grain collecting section 12 and collected. Uncollected dust or uncollected materials such as waste straw are discharged from the handling chamber 3A to the outside of the machine through a dust exhaust passage covered with a dust exhaust cover 11 at the rear.

As shown in FIGS. 1, 3, and 4, the threshing main body 30 of the threshing device 3 has a handling chamber located on the left lateral side of the handling chamber 3A in the closed position, and a portion that becomes the lateral wall of the handling chamber 3A. A side cover 31 is provided that can open the inside of 3A to the outside.
This side cover 31 includes an upper side cover 31A provided at the rear so as to be swingable from side to side around the rotation axis y1 in the vertical direction, and formed on the threshing body 30 at the front side of the upper side cover 31A. The upper front side cover 31B is fitted into and connected to an unillustrated engaging portion, and the unillustrated engaging portion is formed on the threshing body 30 on the lower side of the upper side cover 31A and the upper front side cover 31B. The lower side covers 31C, 31C are connected in a fitted state to the lower side covers 31C, 31C.

The upper side cover 31A is provided so as to be able to perform maintenance on the peripheral portion of the handling cylinder 3B by opening and closing an opening formed on the side of the handling chamber 3A. The opening formed in the lateral side of the handling chamber 3A has an opening range in the front and rear and upper and lower sides so that all or most of the lateral sides of the handling cylinder 3B and receiving net 3C are opened laterally in the open state. has been set.
The upper front side cover 31B opens and closes an opening formed on the lateral side of the rear end of the feeder 16 to facilitate inspection. The opening is set to an appropriate size for inspecting the rear end side of the feeder 16. In addition, the lower side covers 31C, 31C open and close openings formed on the lateral sides of the sorting device to facilitate inspection; The opening range is set to an appropriate size for inspecting the parts.

The upper stage side cover 31A is an integral structure of an outer cover body 31Aa located at the outermost side and an inner cover body 31Ab located at the innermost side facing the handling chamber 3A, and the rear end of the threshing body 30 The whole body is supported so as to be able to swing open and close via a vertical hinge 32 having a rotation axis y1 in the vertical direction. A pull metal fitting 33 is provided at the end of the upper side cover 31A on the side far from the rotation axis y1, and by hooking your finger on this pull metal fitting 33 and pulling it, you can open the upper side cover 31A. The opening operation can be performed by swinging around the rotation axis y1.

As shown in FIGS. 3 and 4, the vertical hinge 32 supporting the upper side cover 31A includes a fixed bracket 34 welded and fixed to the threshing body 30, a support shaft 35 fixed to the fixed bracket 34, and A connection bracket 36 fixed to the side cover 31A is provided.
The connection bracket 36 has a pivot hole (not shown) through which the support shaft 35 can be inserted. By externally fitting the support shaft 35 into this pivot hole, the upper side cover 31A is supported so as to be swingable around 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 connection bracket 36 is provided at two locations above and below in the gap S1 at the rear end of the upper side cover 31A, and has a common rotation axis y1. The upper stage side cover 31A is swingably supported around the upper stage side cover 31A.
The gap S1 is a space formed 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 in the left-right direction at the rear of the upper side cover 31A, It has a width in the left-right direction and front-back direction that can be equipped with a vertical hinge 32. The width of this gap space S1 in the left-right direction is approximately equal to or less than the thickness of the upper side cover 31A in the left-right direction. It is set so that there is no need to increase the thickness.

Although not shown, on the threshing main body 30 at the end far from the rotation axis y1 of the upper stage side cover 31A at a position opposite to the location where the pull metal fitting 33 is provided, there is a A known removable locking member is provided. When the upper stage side cover 31A is in the closed position, the pull fitting 33 engages with the locking member and is maintained in the closed position.
When the puller metal fitting 33 is pulled from the closed position, the engagement part of the puller metal fitting 33 is disengaged from the locking member, and the upper side cover 31A swings toward the open side around the rotation axis y1, thereby threshing. The handling chamber 3A inside the main body 30 is opened to the outside.

[Opening maintenance mechanism]
The threshing device 3 is provided with an opening maintaining mechanism 4 that can maintain the upper side cover 31A in an open position with respect to the threshing main body 30.
The open maintenance mechanism 4 includes 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. It consists of a combination.
As shown in FIGS. 3 to 8, in the embodiment, a guide rail section 40 is provided on the threshing main body 30, and a rod-shaped guide stay 41 bent into a portal shape extends from one end 41a to the upper side cover. 31A so as to be relatively rotatable about the vertical axis y2, and the other end 41b is inserted into the guide rail section 40.

The guide rail portion 40 is constituted by an arc-shaped elongated hole formed in the upper surface of the fixing bracket 34 of the lower vertical hinge 32 of the two vertical hinges 32 provided at the upper and lower positions. The fixing bracket 34 of the lower vertical hinge 32 also serves as a mounting member for the guide rail section 40.
The arc-shaped elongated hole constituting the guide rail section 40 is arranged such that the other end 41b of the guide stay 41 is inserted along the elongated hole when the other end 41b of the rod-shaped guide stay 41 is inserted into the elongated hole. It has a guide width w1 that is slightly larger than the outer diameter d1 of the other end 41b of the guide stay 41 so as to be relatively movable (see FIGS. 6 and 8).

The circular arc of the elongated hole in the guide rail section 40 is not directed in the direction in which the middle part of the elongated hole approaches the support axis 35 of the vertical hinge 32 with respect to the virtual line connecting both ends of the elongate hole, but rather It is formed in an arcuate shape that protrudes in a direction away from 35.
In other words, as shown in FIG. 8, the arc of the elongated hole in the guide rail portion 40 is not the same as the arc whose curvature center is the rotation axis y1 of the vertical hinge 32, but the arc-shaped length along the arc is It is a hole.

More precisely, the arcuate elongated hole of the guide rail portion 40 is located closer to the vertical axis y2 of the one end 41a than the end 40a of the one end 41a of the guide stay 41 that is farther from the vertical axis y2. The end portion 40b of the vertical hinge 32 is formed to be located close to the rotation axis y1 of the vertical hinge 32.
As shown in FIG. 8, the arcuate elongated hole formed in this way is about the rotation axis y1 of the vertical hinge 32, and has a radius smaller than the radius of the virtual arc r1 passing through the end 40a on the far side from the vertical axis y2. Also, the radius of the virtual arc r2 passing through the end 40b on the side closer to the vertical axis y2 is smaller.
In other words, the arcuate long hole of the guide rail portion 40 becomes closer from the end 40a of the one end 41a of the guide stay 41 far from the vertical axis y2 to the end 40b of the guide stay 41 closer to the vertical axis y2. The vertical hinge 32 is inclined so that the radius of curvature around the rotation axis y1 becomes small. This arc-shaped elongated hole is formed along a virtual arc r3 that is 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 shown in FIG. , it exists in a recessed portion 37, which will be described later, at a position different from the rotational axis y1 of the vertical hinge 32.

In this way, the closer the arc-shaped elongated hole of the guide rail part 40 is to the end 40b of the one end 41a of the guide stay 41 on the side closer to the vertical axis y2, the more the radius of curvature around the rotation axis y1 of the vertical hinge 32 increases. If the guide stay 41 is provided so that the rotation axis y1 of the vertical hinge 32 is small, the swinging movement range of the upper side cover 31A per swinging angle of the other end 41b of the guide stay 41 around the rotation axis y1 of the vertical hinge 32 is reduced. It can be made large relative to the length of the arcuate long hole of the rail portion 40.
As a result, as shown in FIG. 8, when the guide stay 41 moves around the rotation axis y1 of the vertical hinge 32, the angle Θ1 at which the other end 41b of the guide stay 41 moves inside the guide rail section 40 The rotation angle Θ2 when the one end portion 41a of the guide stay 41 moves around the rotation axis y1 of the vertical hinge 32 increases.

As described above, when the guide rail portion 40 is formed along an arc having the center of curvature at the rotation axis y1 of the vertical hinge 32, it moves while rotating around the rotation axis y1 of the vertical hinge 32. The movement resistance during relative movement between the other end 41b of the guide stay 41 and the guide rail portion 40 is relatively small.
Then, around the rotation axis y1 of the vertical hinge 32, one end 41a of the guide stay 41 is smaller than the angle Θ1 at which the other end 41b of the guide stay 41 moves within the guide rail section 40. By increasing the rotation angle Θ2 when moving around y1, the upper side cover 31A can be opened wide relative to the length of the arc-shaped elongated hole of the guide rail portion 40.

[Automatic lock part]
The guide rail portion 40 is provided with an automatic lock portion 5 for automatically stopping the opening/closing operation of the upper side cover 31A when the upper side cover 31A is opened to a specific position.
This automatic locking part 5 has a large diameter hole 50 provided in an arcuate long hole of the guide rail part 40 at an end 40b of one end 41a of the guide stay 41 on the side closer to the vertical axis y2, and 50 and a guide stay 41 that is configured to be able to fall down.

As shown in FIGS. 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 rod-shaped member, and its diameter d2 is formed to be 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. has been done.
Therefore, in the region where the other end 41b is guided by the arcuate long hole of the guide rail part 40, the other end 41b of the guide stay 41 is within the guide width w1 of the guide rail part 40, as shown in FIG. You will be guided while it is inserted. At this time, in the rod-like member extending above the other end 41b of the guide stay 41, a portion (corresponding to a large diameter portion) having a diameter d2 larger than the outer diameter d1 of the other end 41b is connected to the guide rail portion 40. It is located on the upper surface side of the fixing bracket 34 above the arc-shaped elongated hole.

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

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.
This support hole 36a is formed to be somewhat larger than the diameter d2 of the guide stay 41. That is, 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, one end of the guide stay 41 On the 41a side, flexibility is provided to the extent that the vertical axis y2 is allowed to be slightly tilted, so that it can be easily fitted.

Flange portions 40c, 40c for limiting the fitting range of each end portion are welded and fixed to the guide stay 41. Furthermore, beta pins 40d and 40d for preventing slippage are removably provided at the ends of the guide rail portion 40 and the portions inserted into the support holes 36a.
In order to operate the upper side cover 31A, which is maintained in the open position, to the closed side, the guide stay 41 in the position shown in FIG. It is brought out of the hole 50, and the upper side cover 31A is moved slightly toward the closed side. As a result, as shown in FIG. 6, the other end portion 41b is inserted into the guide width w1 of the guide rail portion 40, and the upper side cover 31A can be manually operated to the closed side.

[Dust exhaust cover]
As shown in Figures 1, 2, and 5, the rear part of the threshing device 3 is equipped with a structure that guides dust, straw, etc. discharged from the threshing device 3 to the outside of the machine in the lower part of the rear, while suppressing the scattering of dust and straw chips, and releases them from the machine. A dust cover 11 is provided to prevent the dust removal.
This dust exhaust cover 11 is formed of a single piece made of synthetic resin, and is attached to the rear part of the threshing body 30.
When attaching the threshing body 30 to the rear part, use the elasticity of the dust exhaust cover 11 made of synthetic resin to expand the front part 11a and mount the threshing body 30 from the left and right sides, and then attach the threshing body 30 with the connecting bolts 11b. The connection is fixed.

At the rear of the threshing body 30 to which the dust exhaust cover 11 is attached, an upper side cover 31A and the like are provided via a fixed bracket 34 having the guide rail portion 40 described above and a vertical hinge 32 having a connection bracket 36. .
At this time, a part of the upper side cover 31A that opens and closes around the support shaft 35 interferes 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. In order to avoid this, a recessed portion 37 is formed in the fixed bracket 34.

This recessed portion 37 is formed closer to the center of curvature y3 of the arcuate long hole in the guide rail portion 40 than the location where the guide rail portion 40 is provided on the fixed bracket 34, so that By effectively utilizing the curved shape, the recessed portion 37 can be formed to be deeply recessed in the front-rear direction so as to be as close to the guide rail portion 40 as possible.
By forming the recessed part 37 deeply in this way, when a part of the upper stage side cover 31A is opened and closed around the rotation axis y1 of the vertical hinge 32, the rotation axis y1 of the vertical hinge 32 and the threshing body 30 A part of the proximal end side of the upper side cover 31A can be allowed to wrap around easily between the upper side cover 31A and the upper side cover 31A.

[Another embodiment]
Another embodiment will be described below. A plurality of the following embodiments may be used in combination as long as no contradiction occurs. Note that the scope of the present invention is not limited to the contents of these embodiments.

(1) In the embodiment described above, the guide rail portion 40 is formed by an arcuate long hole, but the structure is not necessarily limited to this. For example, the guide rail portion 40 is not limited to an arcuate shape. It may be linear or may have any curved shape.
For other configurations, the same configuration as in the embodiment described above may be adopted.

(2) In the embodiment described above, the guide rail portion 40 is formed by a long hole, but it is not necessarily limited to this structure. For example, it may be formed by using a groove or a rod-shaped rail member. It may be something that has been done.
For other configurations, the same configuration as in the embodiment described above may be adopted.

(3) In the embodiment described above, a structure in which the guide rail portion 40 is formed on the fixing bracket 34 of the vertical hinge 32 is illustrated, but the structure is not limited to this.
For example, among the vertical hinges 32, the guide rail portion 40 may be formed on the connection bracket 36 provided on the side cover 31.
For other configurations, the same configuration as in the embodiment described above may be adopted.

(4) In the embodiment described above, a structure in which the guide rail portion 40 is formed on the fixing bracket 34 or the connection bracket 36 of the vertical hinge 32 is illustrated, but the structure is not limited to this.
For example, apart from the vertical hinge 32, an appropriate attachment member is provided on a part of the threshing body 30 or a part of the side cover 31, and the guide rail portion 40 is formed on the attachment member. Good too.
In this way, the guide rail section 40 and the guide stay 41 can be provided on a mounting member provided separately from the vertical hinge 32, so that the guide rail section 40 and the guide stay 41 can have any configuration. , it is easy to increase the degree of freedom in design by providing it at any location.
For other configurations, the same configuration as in the embodiment described above may be adopted.

(5) In the embodiment described above, a structure in which the automatic locking part 5 was provided at one end of the guide rail part 40 was illustrated, but the structure is not necessarily limited to this structure.
For example, the automatic lock portion 5 may be provided not only at one end of the guide rail portion 40 but also at multiple locations.
For other configurations, the same configuration as in the embodiment described above may be adopted.

(6) In the above-described embodiment, the structure in which the automatic locking part 5 is configured by a combination of the large-diameter hole 50 and the guide stay 41 is illustrated, but the structure is not necessarily limited to this structure, and Any locking structure can be used, such as using a spring-based pinching member.
For other configurations, the same configuration as in the embodiment described above may be adopted.

(7) In the above-described embodiment, the arc-shaped elongated hole of the guide rail portion 40 has 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 it is not necessarily limited to this structure. For example, the radius of curvature may be constant.
For other configurations, the same configuration as in the embodiment described above may be adopted.

(8) In the above-described embodiment, the side cover 31 has a structure in which the opening maintaining mechanism 4 is provided at the rear of the upper side cover 31A, but the structure is not necessarily limited to this structure. For example, the opening maintaining 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.
For other configurations, the same configuration as in the embodiment described above may be adopted.

(9) In the embodiment described above, the upper side cover 31A shown as an example of the side cover 31 has an outer cover body 31Aa located at the outermost side and an inner cover body 31Ab located at the innermost side facing the handling room 3A. Although a structure in which the two are integrated is illustrated, it is not necessarily necessary to use this structure, and the outer cover body 31Aa may be opened and closed by swinging separately from the inner cover body 31Ab.
For other configurations, the same configuration as in the embodiment described above may be adopted.

The present invention is applicable not only to ordinary combine harvesters but also to self-extracting combine harvesters. Moreover, it can be applied to harvesting machines for not only crops such as rice and wheat but also various crops.

3 Threshing device 4 Opening maintenance mechanism 5 Automatic lock part 30 Threshing body 31 Side cover 32 Vertical hinge 34 Fixed bracket 35 Support shaft 36 Connection bracket 37 Recessed part 40 Guide rail part 41 Guide stay 41a One end part 41b Other end part 50 Large diameter Hole y1 Rotation axis y2 Vertical axis y3 Center of curvature w1 Guide width

Claims (7)

A threshing device is provided, which has a threshing main body in which a handling chamber for threshing processing is formed, and a side cover that covers the lateral side of the handling chamber,
The side cover is supported so as to be able to swing open and close relative to the threshing body via a vertical hinge having a vertical axis of rotation, and the side cover can be maintained in an open position with respect to the threshing body. Equipped with an open maintaining mechanism,
The opening maintaining mechanism includes a guide stay provided on one of the threshing main body and the side cover, and a guide rail section provided on the other of the threshing main body and the side cover,
One end of the guide stay is pivoted to the one side so as to be relatively rotatable around an up-down axis, and the other end of the guide stay is rotated within the guide rail portion relative to each other as the side cover swings open and close. is movably engaged with the guide rail portion,
A harvester in which the guide rail section is provided with an automatic lock section that applies movement resistance at a specific position to the other end guided by the guide rail section to automatically restrict relative movement of the other end. . The guide rail portion is formed by a long hole that guides the other end portion,
The guide stay is formed by a rod-shaped member,
The automatic locking portion is provided at an end of the elongated hole in a large diameter hole portion that is wider than the guide width of the elongated hole, and in a portion of the guide stay on the other end side, and The harvester according to claim 1, further comprising a large diameter portion having a diameter larger than the guide width and capable of being inserted into and removed from the large diameter hole. 2. An end of the long hole closer to the vertical axis is located closer to the rotational axis than an end of the long hole farther from the vertical axis. Harvester as described. 3. The harvester according to claim 2, wherein the elongated hole is an arc-shaped elongated hole along an arc centered on the rotation axis of the vertical hinge. The vertical hinge connects the fixed bracket provided on the threshing body, the connection bracket provided on the side cover, and the fixed bracket and the connection bracket so as to be relatively rotatable about the rotation axis. comprising a pivot shaft;
the guide rail portion is provided on the fixed bracket,
2. The harvester of claim 1, wherein said one end is pivoted to said connection bracket. 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 recessed portion is formed in the fixed bracket to allow a part of the proximal end portion of the side cover operated in the open position to enter between the rotation axis of the vertical hinge and the threshing body. 6. The harvesting machine according to claim 5. The harvester according to claim 6, wherein the recessed portion is formed closer to the center of curvature of the arcuate long hole than a location where the arcuate long hole is provided.

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