JP7301025B2 - combine - Google Patents

Description

The present invention relates to combine harvesters.

Conventionally, as a combine harvester, for example, a combine harvester described in Patent Literature 1 is known. The combine described in Patent Document 1 includes a threshing device for threshing harvested grain culms, and a straw cutting device (“shredding device [2]” in the document) that is provided behind the threshing device and cuts the discharged straw. is provided. The straw cutting device has an inlet into which the straw is thrown, a cutter ("rotary blade [4], [5]" in the literature) for cutting the straw thrown into the inlet, and a A switching cover (referred to as "cover body [3 ]”) and are provided. Patent Literature 1 discloses a technique for detecting clogging of waste straw in a straw cutting device using a contact sensor.

JP-A-8-154469

In the technology disclosed in Patent Document 1, even if the straw cutting device is clogged with straw, the clogging of the straw is not detected by the sensor unless the straw comes into contact with the sensor. For this reason, a time delay is likely to occur between the time when the waste straw is clogged in the waste straw cutting device and the time when the sensor detects the clogging of the waste straw.

In view of the above situation, there is a demand for a combine harvester that can quickly detect clogging of the straw in the straw cutting device.

A feature of the present invention is that it comprises a threshing device for threshing harvested grain culms, and a straw cutting device provided behind the threshing device for cutting the discharged straw. a cutter for cutting the waste straw thrown into the throwing port; an open position where the throwing port is opened and a closed position where the throwing port is closed around a swing axis extending along the left-right direction of the machine body; a switch cover pivotable over a range, the non-contact sensor detecting when the switch cover is not positioned between the open position and the closed position; The sensor has a magnet and a sensor body for detecting the magnet, and the magnet and the sensor body are arranged adjacent to each other in the swing axis direction.

According to this characteristic configuration, when the discharged straw is clogged in the discharged straw cutting device, and the switching cover receives the pressure of the discharged straw and is positioned at a position other than the open position and the closed position, the switching cover is moved to the open position. and the closed position will be detected by the contactless sensor. That is, when the discharged straw is clogged in the discharged straw cutting device, the clogging of the discharged straw is detected by the sensor even if the discharged straw does not contact the sensor. As a result, clogging of the straw in the straw cutting device can be quickly detected.

A feature of the present invention is that it comprises a threshing device for threshing harvested grain culms, and a straw cutting device provided behind the threshing device for cutting the discharged straw. a cutter for cutting the waste straw thrown into the throwing port; an open position where the throwing port is opened and a closed position where the throwing port is closed around a swing axis extending along the left-right direction of the machine body; a switch cover pivotable over a range, the non-contact sensor detecting when the switch cover is not positioned between the open position and the closed position; The switching cover has a cover body and a cover frame that supports the cover body, and the cover body and the cover frame are configured to be relatively rockable about the rocking axis. , one of the cover main body and the cover frame is urged to swing toward the other of the cover main body and the cover frame around the swing axis, and the sensor is adapted to move the cover main body. and the cover frame are separated from each other around the swing axis, and the sensor is provided laterally adjacent to the cover frame and covers an inner portion of the straw cutting device among the sensors. It has a cover.

According to this characteristic configuration, when the discharged straw is clogged in the discharged straw cutting device, and the switching cover receives the pressure of the discharged straw and is positioned at a position other than the open position and the closed position, the switching cover is moved to the open position. and the closed position will be detected by the contactless sensor. That is, when the discharged straw is clogged in the discharged straw cutting device, the clogging of the discharged straw is detected by the sensor even if the discharged straw does not contact the sensor. As a result, clogging of the straw in the straw cutting device can be quickly detected.
According to this characteristic structure, when the discharged straw is clogged in the discharged straw cutting device, the cover body receives the pressure of the discharged straw and is separated from the cover frame around the swing axis. When the removed straw is clogged in the removed straw cutting device, the cover body receives pressure from the removed straw and separates from the cover frame around the swing axis. This will be detected by the non-contact sensor. As a result, clogging of the waste straw in the waste straw cutting device can be quickly and reliably detected.
According to this characteristic configuration, the sensor is covered with the cover frame and the sensor cover from the lateral side and the inner side of the discharged straw cutting device. As a result, the discharged straw can be prevented from entangling the sensor.

A feature of the present invention is that it comprises a threshing device for threshing harvested grain culms, and a straw cutting device provided behind the threshing device for cutting the discharged straw. a cutter for cutting the waste straw thrown into the throwing port; an open position where the throwing port is opened and a closed position where the throwing port is closed around a swing axis extending along the left-right direction of the machine body; a switch cover pivotable over a range, the non-contact sensor detecting when the switch cover is not positioned between the open position and the closed position; Preferably, the sensor has a magnet and a sensor body that detects the magnet, and has a magnet cover that covers a surface of the magnet other than the surface facing the sensor body.

According to this characteristic configuration, when the discharged straw is clogged in the discharged straw cutting device, and the switching cover receives the pressure of the discharged straw and is positioned at a position other than the open position and the closed position, the switching cover is moved to the open position. and the closed position will be detected by the contactless sensor. That is, when the discharged straw is clogged in the discharged straw cutting device, the clogging of the discharged straw is detected by the sensor even if the discharged straw does not contact the sensor. As a result, clogging of the straw in the straw cutting device can be quickly detected.
According to this characteristic configuration, the magnetic force of the magnet can be easily adjusted to a magnetic force suitable for the sensor main body to detect the magnet.
Furthermore, in the present invention, it is preferable that the sensor detects that the switching cover is located on the side opposite to the closed position relative to the open position around the swing axis.
According to this characteristic configuration, when the discharged straw is clogged in the discharged straw cutting device, the switching cover receives the pressure of the discharged straw and swings around the swing axis to a position on the side opposite to the closed position rather than the open position. It will be. Then, when the straw is clogged in the straw cutting device, the switching cover receives the pressure of the straw and swings about the swing axis from the open position to the position opposite to the closed position. is positioned on the opposite side of the closed position than the open position around the swing axis by the non-contact sensor. As a result, clogging of the waste straw in the waste straw cutting device can be quickly and reliably detected.

It is a left view which shows a combine. It is a top view which shows a combine. It is left side sectional drawing which shows a threshing apparatus. It is a right side view showing a switching cover. It is a front view showing a switching cover. It is a front view which shows the right end part of a switching cover. It is a rear view which shows the right end part of a switching cover. FIG. 10 is a view showing the sensor and the lock mechanism, showing a state in which the cover main body and the arm are connected; FIG. 10 is a diagram showing the sensor and the lock mechanism, showing a state in which the cover main body and the arm are disconnected; FIG. 4 is a right side view of the sensor, showing a state in which the magnet is separated from the sensor main body; It is another embodiment and is a left view which shows a discharged straw cutting device and a binding device. It is another embodiment and is a left side view showing a lock mechanism. It is another embodiment and is a rear view which shows the right side part of a straw cutting device and a binding device. It is another embodiment and is a right view which shows a straw cutting device and a binding device. It is another embodiment and is a perspective view which shows a support member. FIG. 15 is a cross-sectional view taken along line XVI-XVI in FIG. 14, which is another embodiment.

A mode for carrying out the present invention will be described based on the drawings. In the following explanation, the direction of arrow F is "front of the aircraft", the direction of arrow B is "back of the aircraft", the direction of arrow L is "left of the aircraft", and the direction of arrow R is "right of the aircraft". "Direction".

[Overall configuration of combine harvester]
1 and 2 show a self-threshing combine. The combine is provided with a traveling machine body 1. - 特許庁A traveling machine body 1 is provided with a machine body frame 2 and a crawler traveling device 3 that supports the machine body frame 2. - 特許庁A reaping unit 4 for reaping planted grain culms is provided in front of the traveling machine body 1 . A driving unit 5 is provided in the front part of the traveling machine body 1 . An engine E is provided below the operating section 5 .

A threshing device 6 for threshing harvested grain culms and sorting threshed products is provided behind the harvesting unit 4 . A feed chain 7 for conveying harvested grain culms is provided on the left side of the threshing device 6 . The threshing device 6 is arranged on the left side of the traveling machine body 1 . A grain storage tank 8 for storing grains is provided on the right side of the threshing device 6 . The threshing device 6 and grain storage tank 8 are supported by the body frame 2 . The grain storage tank 8 is connected with a grain discharge device 9 for discharging the grains in the grain storage tank 8 . At the rear of the threshing device 6, a straw conveying device 17 for conveying straw is provided. Behind the threshing device 6, a straw cutting device 18 for cutting the straw is provided. The straw cutting device 18 has an open position (non-working position) in which the front portion of the straw cutting device 18 is opened around the swing axis Z1 extending along the vertical direction, and a closed position in which the front portion of the straw cutting device 18 is closed. position (working position).

[Threshing device]
As shown in FIG. 3, the threshing device 6 includes a threshing unit 10 for threshing harvested culms, and a sorting unit 11 provided below the threshing unit 10 for sorting threshed products. The threshing part 10 includes a threshing cylinder 12 rotatable around a rotation axis Y1 extending in the longitudinal direction of the machine body, a threshing chamber 13 accommodating the threshing cylinder 12, and a receiving net 14 provided around the threshing cylinder 12. , a separation drum 15 for separating straw and grains while spreading the threshed material, and a dust discharge fan 16 for discharging dust to the outside.

The sorting unit 11 includes a rocking sorting device 21 for rocking and sorting grains, a winnow 22 for blowing sorting air to the rocking sorting device 21, and provided below the rocking sorting device 21. A first recovery unit 23 for recovering grains (single grains, etc.) and a second recovery unit 23 provided below the swing sorting device 21 for collecting second grains (grains with branch stems, etc.) A recovery unit 24 is provided. The first collecting part 23 is provided with the first screw 25 for conveying the first grain to the right. A right end portion of the first recovery section 23 is connected to a grain lifting device 26 that lifts the first grain from the first screw 25 toward the grain storage tank 8 . The second recovery part 24 is provided with a second screw 27 for conveying the second grain to the right. A second reducing device 28 for returning the second grain from the second screw 27 to the swing sorting device 21 is connected to the right end of the second recovery unit 24 .

[Straw cutting device]
As shown in FIG. 3 , the straw cutting device 18 is provided behind the threshing section 10 . The discharged straw cutting device 18 is provided with a cutter case 44 and a cutter 45. - 特許庁

A cutter 45 is accommodated in the cutter case 44 . An upper surface portion of the cutter case 44 is formed with an inlet 44a into which waste straw is introduced. The cutter case 44 is provided with a switching cover 48 .

The switching cover 48 is configured to be swingable about a swing axis X1 extending in the lateral direction of the machine body between an open position P1 at which the inlet 44a is opened and a closed position P2 at which the inlet 44a is closed. When the switching cover 48 is in the open position P1, the discharged straw from the discharged straw conveying device 17 is thrown into the inlet 44a and cut by the cutter 45. As shown in FIG. When the switching cover 48 is in the closed position P2, the discharged straw from the straw conveying device 17 slides on the upper surface of the switching cover 48 and falls to the ground.

The cutter 45 is configured to cut the discharged straw introduced into the inlet 44a. The cutter 45 is provided with a cutting section 49 and a supply section 50 .

The cutting section 49 is provided with a cutting shaft 51 and a plurality of cutting blades 52 . The cutting shaft 51 is configured to be rotatable around a rotation axis X2 extending along the left-right direction of the machine body. Power from the threshing device 6 is transmitted to the cutting shaft 51 by a belt transmission mechanism (not shown). A plurality of cutting blades 52 are provided on the cutting shaft 51 at intervals in the direction of the rotation axis X2.

The supply unit 50 is provided with a supply shaft 53 and a plurality of raking blades 54 . The supply shaft 53 is configured to be rotatable around a rotation axis X3 extending along the left-right direction of the machine body. The power of the cutting shaft 51 is transmitted to the supply shaft 53 by a chain transmission mechanism (not shown). A plurality of raking blades 54 are provided on the supply shaft 53 at intervals in the direction of the rotation axis X3.

[Switch cover]
As shown in FIGS. 4 and 5 , the switching cover 48 includes a cover body 55 and a cover frame 56 that supports the cover body 55 . The cover frame 56 is provided with a support shaft 57 and left and right arms 58 .

The support shaft 57 is provided so as to extend along the left-right direction of the vehicle body. The support shaft 57 is rotatably supported by the left and right stays 59 about the swing axis X1. A link 60 is provided at the right end of the support shaft 57 to which an actuator (for example, an electric motor, not shown) for swinging the switching cover 48 is linked. When the driving force of the actuator is transmitted to the support shaft 57 via the link 60, the switching cover 48 is driven to swing.

The left arm 58 is connected to the left end of the support shaft 57 so as to be able to swing together with the support shaft 57 . The right arm 58 is connected to the right end of the support shaft 57 so that it can swing integrally with the support shaft 57 . The arm 58 is provided with a first arm portion 61 and a second arm portion 62 located laterally outside the first arm portion 61 . The first arm portion 61 and the second arm portion 62 are configured integrally. The first arm portion 61 is provided with a leaf spring 63 that urges the cover body 55 to swing toward the cover frame 56 around the swing axis X1.

The cover main body 55 is supported by the support shaft 57 so as to be able to swing about the swing axis X1. A left end portion of the cover body 55 is supported by a left arm 58 . A right end portion of the cover body 55 is supported by a right arm 58 . An insertion portion 55 a is formed in a portion between the left arm 58 and the right arm 58 at the end of the cover body 55 on the support shaft 57 side. A support shaft 57 is inserted through the insertion portion 55a so as to be rotatable about the swing axis X1. That is, the switching cover 48 is configured such that the cover main body 55 and the cover frame 56 can relatively swing about the swing axis X1. The cover main body 55 is urged to swing toward the side near the cover frame 56 (left and right arms 58) about the swing axis X1 by left and right leaf springs 63 .

As shown in FIGS. 6 to 9 , lock mechanisms 64 are provided on the left and right across the cover body 55 and the arms 58 to connect the cover body 55 and the arms 58 . The left lock mechanism 64 is configured across the left end portion of the cover main body 55 and the left first arm portion 61 . The right lock mechanism 64 is configured across the right end portion of the cover main body 55 and the right first arm portion 61 .

The lock mechanism 64 is configured to be switchable between a connected state (see FIG. 8) in which the cover main body 55 and the arm 58 are connected and a disconnected state (see FIG. 9) in which the cover main body 55 and the arm 58 are disconnected. ing. The lock mechanism 64 has a pin 65 and a hook 66 that can be hooked on the pin 65 . The pins 65 are provided along both lateral sides of the first arm portion 61 . The pin 65 is configured by a headed pin. Long holes 61a into which pins 65 are inserted are formed in both lateral sides of the first arm portion 61, respectively. The elongated hole 61a is formed by an elongated elongated hole around the swing axis X1.

The hook 66 is supported by the cover body 55 so as to be able to swing about a swing axis X4 (see FIG. 10) extending along the swing axis X1 direction. When the hook 66 is swung and hooked on the pin 65, the lock mechanism 64 is in the connected state (see FIG. 8). When the lock mechanism 64 is in the connected state, the cover main body 55 and the cover frame 56 can swing integrally about the swing axis X1, and the pin 65 can move along the long hole 61a. The main body 55 can relatively swing with respect to the cover frame 56 around the swing axis X1.

When the hook 66 is oscillated to release the hook 66 from the pin 65, the lock mechanism 64 is in the disconnected state (see FIG. 9). When the lock mechanism 64 is in the disconnected state, the cover body 55 can relatively swing with respect to the cover frame 56 around the swing axis X1.

[Sensor]
As shown in FIGS. 6 to 9, a sensor 67 is provided to detect that the switching cover 48 is not positioned between the open position P1 and the closed position P2. The sensor 67 is configured to detect that the cover body 55 is located on the opposite side of the closed position P2 from the open position P1 around the swing axis X1 (for example, the separated position P3 in FIG. 4). ing. That is, the sensor 67 is configured to detect that the cover main body 55 and the cover frame 56 are separated from each other around the swing axis X1.

The sensor 67 is provided laterally next to the cover frame 56 . Specifically, the sensor 67 is provided on the right side of the right first arm portion 61 . That is, the sensor 67 is provided at the end (right end) of the switching cover 48 on the side where the link 60 is located.

The sensor 67 is configured by a non-contact sensor. In this embodiment, the sensor 67 is configured by a proximity sensor. The sensor 67 includes a magnet 68 and a sensor body 69 that detects the magnet 68 . The magnet 68 and the sensor main body 69 are arranged adjacent to each other in the swing axis X1 direction.

The magnet 68 is provided on the cover main body 55 . The magnet 68 is arranged on the right side of the sensor body 69 . Magnet 68 is supported by cover body 55 via stay 70 .

A magnet cover 71 is provided to cover the surface of the magnet 68 other than the surface facing the sensor main body 69 . The magnet cover 71 is composed of a member that opens toward the sensor main body 69 side. In this embodiment, the magnet cover 71 is configured to cover the four sides of the magnet 68 . Specifically, the magnet cover 71 is configured to cover the surface of the magnet 68 other than the surface facing the sensor main body 69 and the surface facing the cover main body 55 . The magnet cover 71 is bolted to the stay 70 together with the magnet 68 .

A sensor cover 72 is provided to cover the inside portion of the straw cutting device 18 of the sensor 67 . The sensor cover 72 is fixed to the right side of the right first arm portion 61 . The sensor cover 72 is composed of a member that opens on the right side and on the support shaft 57 side. The sensor cover 72 includes a first surface portion 72a substantially parallel to the cover main body 55, a second surface portion 72b substantially perpendicular to the cover main body 55 and the first surface portion 72a, a cover main body 55 and the first surface and a third surface portion 72c substantially perpendicular to the portion 72a.

The third surface portion 72 c is fixed to the right side portion of the right first arm portion 61 along the right side surface of the right first arm portion 61 . A long hole 72d into which the pin 65 is inserted is formed in the third surface portion 72c. The elongated hole 72d is formed by an elongated elongated hole around the swing axis X1.

The sensor body 69 is provided on the cover frame 56 . The sensor main body 69 is supported by the right first arm portion 61 via the sensor cover 72 . The sensor main body 69 is bolted to the first surface portion 72a.

According to such a configuration, as shown in FIGS. 4 and 10, in the discharged straw cutting device 18, when the switching cover 48 is in the open position P1 and the discharged straw is being cut, the discharged straw When the straw clogging device 18 is clogged, the cover body 55 receives the pressure of the discharged straw and is separated from the cover frame 56 around the pivot axis X1 to the separated position P3. Along with this, the magnet 68 is separated from the sensor main body 69 around the swing axis X1.

Then, the sensor 67 detects that the switching cover 48 is not positioned between the open position P1 and the closed position P2. When the sensor 67 detects that the switching cover 48 is not positioned between the open position P1 and the closed position P2, the engine E is stopped.

[Another embodiment]
(1) As shown in FIG. 11 , a binding device 19 that binds the straw conveyed by the straw conveying device 17 may be provided behind the straw conveying device 17 and the straw cutting device 18 . The binding device 19 is connected to the straw cutting device 18 .

As shown in FIGS. 11 and 12, a locking mechanism 73 is provided for fixing the straw cutting device 18 in the closed position. The lock mechanism 73 includes a pin 74 , an engaging member 75 that can be engaged with the pin 74 , and a hook 76 that can be hooked on the pin 74 . The pin 74 is provided on the left side of the threshing device 6 so as to extend along the left-right direction of the machine body. The engaging member 75 and the hook 76 are provided on the left side of the straw cutting device 18 . The engaging member 75 includes an engaging groove 75a with which the pin 74 engages, a guide portion 75b that guides the pin 74 to the engaging groove 75a, and an extension guide portion 75c that extends the guide portion 75b upward. It is

According to such a configuration, when the hook 76 is hooked on the pin 74 while the pin 74 is engaged with the engagement groove 75a, the straw cutting device 18 is fixed at the closed position. Here, if the straw cutting device 18 is in the open position, the weight of the straw cutting device 18 and the weight of the binding device 19 cause the straw cutting device 18 to move laterally on the side opposite to the swing axis Z1. Even if the side portion (left side portion) hangs down, the extension guide portion 75c contacts the pin 74 as the straw cutting device 18 swings about the swing axis Z1 toward the closed position. The pin 74 can be easily guided to the engagement groove 75a.

As shown in FIGS. 13 and 14 , a cutter frame 46 is provided on the right side of the straw cutting device 18 . The straw cutting device 18 is supported by a post 77 via a cutter frame 46 so as to be swingable about the swing axis Z1. Support shafts 78 for supporting the straw cutting device 18 are provided above and below the post 77 .

The cutter frame 46 is provided with an upper attachment portion 79 attached to the upper support shaft 78 and a lower attachment portion 80 attached to the lower support shaft 78 . A hole (not shown) into which the upper support shaft 78 is inserted is formed in the upper mounting portion 79 . A hole (not shown) into which the lower support shaft 78 is inserted is formed in the lower mounting portion 80 .

As shown in FIGS. 13 and 15, a support member 81 that supports the cutter frame 46 from below is provided across the lower end of the cutter frame 46 and the lower support shaft 78 . The support member 81 includes a shaft portion 82 inserted into the lower end (opening) of the cutter frame 46, an attachment portion 83 attached to the lower support shaft 78, and a receiving portion 84 that receives the lower attachment portion 80 from below. , and a rib 85 provided over the receiving portion 84 and the shaft portion 82 . The mounting portion 83 is formed with a hole 83a into which the lower end portion of the lower support shaft 78 is inserted.

According to such a configuration, the lower attachment portion 80 is supported not only by the support shaft 78 on the lower side but also by the support member 81 . Thereby, the load applied to the lower mounting portion 80 can be reduced.

As shown in FIGS. 13 and 14 , a binding frame 86 is provided on the right side of the binding device 19 . A connecting member 87 is provided to connect the cutter frame 46 and the binding frame 86 (see FIG. 16). The connecting member 87 includes a pair of plate members 88 that sandwich the cutter frame 46 and the binding frame 86, and a pair of bolts 89 that fix the plate members 88 with the cutter frame 46 and the binding frame 86 sandwiched therebetween. .

With such a configuration, the cutter frame 46 and the binding frame 86 are connected by the connecting member 87 . As a result, the cutter frame 46 and the binding frame 86 can be firmly connected so that the lateral side (left side) of the discharged straw cutting device 18 opposite to the swing axis Z1 does not hang down. .

(2) In the above embodiment, the sensor 67 is configured by a proximity sensor. However, the "sensor" according to the present invention is not limited to proximity sensors. For example, the "sensor" according to the present invention may consist of an ultrasonic sensor or a laser sensor.

(3) In the above embodiment, the sensor 67 is provided at the right end of the switching cover 48 . However, the sensor 67 may be provided at the left end of the switching cover 48 . Alternatively, the sensors 67 may be provided at both left and right ends of the switching cover 48, respectively. That is, a plurality of sensors 67 may be provided.

(4) In the above embodiment, the sensor cover 72 is provided. However, the sensor cover 72 may not be provided.

(5) In the above embodiment, the magnet cover 71 is configured to cover the surface of the magnet 68 other than the surface facing the sensor main body 69 . However, the magnet cover 71 may be configured to cover part or all of the surface of the magnet 68 facing the sensor body 69 .

(6) In the above embodiment, the magnet cover 71 is provided. However, the magnet cover 71 may not be provided.

INDUSTRIAL APPLICABILITY The present invention can be used for self-threshing combine harvesters.

6 Threshing device 18 Straw cutting device 44a Input port 45 Cutter 48 Switching cover 55 Cover main body 56 Cover frame 67 Sensor 68 Magnet 69 Sensor main body 71 Magnet cover 72 Sensor cover P1 Open position X1 Swing axis

Claims (4)

a threshing device for threshing harvested grain culms;
and a straw cutting device that is provided behind the threshing device and cuts the straw,
The straw cutting device includes a slot into which the straw is thrown, a cutter that cuts the straw thrown into the slot, and an opening around the swing axis extending in the left-right direction of the machine body. A combine harvester comprising a switching cover that can swing between an open position and a closed position that closes the input port,
A non-contact sensor that detects that the switching cover is not positioned between the open position and the closed position ;
The sensor has a magnet and a sensor body that detects the magnet,
A combine harvester in which the magnet and the sensor main body are arranged adjacent to each other in the swing axis direction . a threshing device for threshing harvested grain culms;
and a straw cutting device that is provided behind the threshing device and cuts the straw,
The straw cutting device includes a slot into which the straw is thrown, a cutter that cuts the straw thrown into the slot, and an opening around the swing axis extending in the left-right direction of the machine body. A combine harvester comprising a switching cover that can swing between an open position and a closed position that closes the input port,
A non-contact sensor that detects that the switching cover is not positioned between the open position and the closed position;
The switching cover has a cover body and a cover frame that supports the cover body, and the cover body and the cover frame are configured to be relatively rockable about the rocking axis,
one of the cover main body and the cover frame is urged to swing toward the other of the cover main body and the cover frame around the swing axis;
the sensor detects that the cover main body and the cover frame are separated from each other around the swing axis;
The sensor is provided laterally adjacent to the cover frame,
A combine harvester comprising a sensor cover that covers an inner portion of the straw cutting device among the sensors. a threshing device for threshing harvested grain culms;
and a straw cutting device that is provided behind the threshing device and cuts the straw,
The straw cutting device includes a slot into which the straw is thrown, a cutter that cuts the straw thrown into the slot, and an opening around the swing axis extending in the left-right direction of the machine body. A combine harvester comprising a switching cover that can swing between an open position and a closed position that closes the input port,
A non-contact sensor that detects that the switching cover is not positioned between the open position and the closed position;
The sensor has a magnet and a sensor body that detects the magnet,
A combine harvester comprising a magnet cover that covers a surface of the magnet other than the surface facing the sensor main body. The combine according to any one of claims 1 to 3, wherein the sensor detects that the switching cover is located on a side opposite to the closed position relative to the open position around the swing axis. .

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