JP2020103159A - Harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily open and close a lid portion for closing an inspection port of a collection portion of an object to be processed. SOLUTION: The bottom 31 of a grain removing device has an inspection port 61 formed below a lateral feed screw 26, a lid portion 71 covering the inspection port 61, and a lock operation tool 81, and the lock operation tool 81 is operated. The lid 71 is provided with a lock mechanism 80 that can be switched between a locked state for fixing the lid 71 in the closed position and an unlocked state for releasing the locked state, and the lid 71 is parallel to the axis X of the lateral feed screw 26. It is cantilevered and supported by the support shaft portion 36 so that it can swing up and down around the support shaft portion 36, and has an open position that swings downward to open the inspection port 61 and swings upward to open the inspection port 61. It is possible to switch between the closed position and the closed position, and the lock mechanism can switch between the locked state and the released state by moving the lid portion 71 along the axis X direction by operating the lock operating tool 81. It is configured in. [Selection diagram] FIG. 10

Description

INDUSTRIAL APPLICABILITY The present invention provides a threshing processing unit that performs a handling process by a handling cylinder and leaks and sorts an object to be processed by a receiving net, and a threshing processing unit that is provided below the threshing processing unit and sorts a processed object that leaks from the receiving net. The present invention relates to a harvester provided with a threshing device having a sorting processing unit.

In such a harvesting machine, a No. 1 collecting unit, a No. 2 collecting unit, and the like are provided as collecting units for collecting the sorted objects. These collecting units are provided with a lateral feed screw that conveys an object to be processed, and requires maintenance work. Patent Document 1 discloses a configuration of a harvester in which an inspection port is provided in the lower part of the No. 1 product recovery unit in a threshing device, and a lid unit that opens and closes the inspection port is provided. The lid is cantilevered by the support shaft so that it can swing up and down around the support shaft that is parallel to the axis of the transverse feed screw, and swings downward to open the inspection port. , And can be switched to a closed position in which the inspection port is closed by swinging upward.

Japanese Unexamined Patent Publication No. 2018-82650

In the harvester disclosed in Patent Document 1 described above, a plurality of buckle members are provided at the bottom of the threshing device as a fixture for fixing the lid to the inspection port at the closed position, and the lid is locked at the closed position ( To fix the position), it is necessary to perform the fixing operation with the buckle member while the position of the lid is held so that the lid does not droop downward. Also, in the case of unlocking, when you put your hand under the lid to operate the buckle member, make sure that the lid does not hang down vigorously due to its own weight at the moment when the fixing by the buckle member is released. While operating the buckle operating tool, the lid part is given a rising force that opposes the weight of the lid part. Since the lid portion is required to have abrasion resistance, it tends to be heavy. For example, it is a burden on the operator to operate the buckle with one hand while firmly holding the lid member with one hand. Further, the buckle member needs to be operated by inserting a hand into the lower position of the threshing device, and there is a situation in which it is forced to take an unreasonable posture, which may also impose a burden on the work vehicle. Thus, there is room for improvement in the operability of the lid.

Therefore, the present invention is intended to provide a harvester that can easily open and close the inspection port formed in the processing object recovery unit.

The harvester of the present invention is
A threshing processing unit that performs a handling process by a handling cylinder and leaks and sorts an object to be processed by a receiving net, and a sorting process that is provided below the threshing processing unit and performs a sorting process on an object to be leaked from the receiving net. And a swinging and sorting device for swinging and sorting the objects to be processed in the sorting processing part, the swinging and sorting device being provided below the swinging and sorting device. An inspection port formed below the lateral feed screw at the bottom of the threshing device, and an inspection port having a lateral feed screw that laterally conveys the thresher selected by the sorting device and sends it out of the threshing device. A lock mechanism that has a lid portion that covers the lid, and a lock operation tool, and that can switch between a locked state in which the lid portion is fixed to the closed position by the operation of the lock operation tool and a release state in which the lock state is released. The lid part is cantilevered by the support shaft part so as to be vertically swingable around a support shaft part parallel to the axis of the transverse feed screw, and is swung downward to perform the inspection. It is possible to switch between an open position that opens the mouth and a closed position that swings upward to close the inspection port, and the lock mechanism operates the lock operation tool to move the lid portion in the axial direction. The lock state and the unlocked state can be switched by moving along.

According to this configuration, the locked state and the released state can be switched by a simple operation of simply sliding the lid portion in the axial direction while holding the lock operation tool. Therefore, the burden on the operator is reduced and the inspection port can be easily opened and closed.

In the present invention, it is preferable that the lock mechanism has a first lock portion provided on a side far from the lock operation tool and a second lock portion provided on a side close to the lock operation tool.

According to this configuration, the lock mechanism can bring the lid portion into the locked state at the two positions, the far side and the near side with respect to the position of the lock operation tool. As a result, the lid can be stably fixed in the closed position.

In the harvester according to the present invention, it is preferable that the lock mechanism is configured such that the second lock portion is released before the first lock portion.

The first lock portion is present on the side far from the lock operation tool, and the second lock portion is present on the side close to the lock operation tool. If the first lock portion is released before the second lock portion, the lid portion is supported by the lock operating tool and the second lock portion. Since the second lock portion is on the side closer to the lock operation tool, the lid portion is supported at a portion biased to the lock operation tool side, and the support balance of the lid portion is deteriorated. On the other hand, when the second lock portion is released before the first lock portion as in the present configuration, the lid portion locks the lock operation tool and the first lock when the second lock portion is released. Supported by the department. In this case, since the first lock portion is farther from the lock operation tool than the second lock portion, the support balance of the lid portion becomes good. Therefore, with this configuration, the lid can be moved smoothly when releasing the locked state.

In the present invention, in the lock mechanism, the first lock portion is continuous with one end portion of the lid portion, a mounting portion that holds the one end portion of the lid portion at the closed position, and the mounting portion. And a guide portion that guides the one end of the lid portion to the placement portion from a position lower than the placement portion, and the second lock portion is provided on the lid portion. It is preferable that it is configured by a portion and an engaged portion provided on the bottom portion.

According to this configuration, the first lock portion has a simple configuration in which one end portion of the lid portion is held in the closed position by riding on the mounting portion and the guide portion, and the second lock portion has the closed position. The closed lid is locked by the engagement of the engaging portion and the engaged portion. That is, the lid portion is guided toward the engagement state by the first lock portion toward the engagement operation of the second lock portion, and the transition from the released state to the locked state (engagement) is performed smoothly and reliably. You can Further, regarding the transition from the locked state to the released state, even if the engagement of the second lock portion is released, the lid portion does not suddenly drop and swing downward, but the first lock portion supports the sudden swing movement. Movement is prevented.

In the present invention, it is preferable that the lock mechanism has a movement restricting portion that restricts movement of the lid portion within a predetermined range.

According to this configuration, the movement of the lid is restricted within a predetermined range by the movement restricting unit, so that it is possible to avoid a problem that the lid collides with another member when the lid is slid.

It is a left side view showing a self-removing combine. It is a top view which shows a self-removing combine. It is a left side view which shows the inside of a threshing device typically. It is a side sectional view of the rear part of a threshing device. It is a top view of the bottom of the second thing collection part. It is a bottom view of the second thing collection part. It is an exploded perspective view showing the bottom of the second thing collection part of the machine body front view. FIG. 6 is an exploded perspective view showing a bottom portion of a second object recovery section when seen from the rear of the machine body. It is a side sectional view of the important section of the second item collection section. It is a side sectional view of the important section of the second item collection section. It is a figure which shows the movement operation|movement of the cover part in the bottom part of the second item recovery part.

Hereinafter, an embodiment of a self-removing combine as an example of the harvesting machine according to the present invention will be described with reference to the drawings.
In addition, the front-rear direction and the left-right direction in the description of the present embodiment are defined as follows unless otherwise specified. That is, the forward traveling direction (see arrow F in FIG. 1) is “forward” and the backward traveling direction (see arrow B in FIG. 1) is “forward” during work traveling of the self-removing combine according to the present invention. "Rear", the direction corresponding to the right side (see arrow R in FIG. 2) with respect to the forward facing posture in the front-rear direction is "right", and the direction corresponding to the left side (see arrow L in FIG. 2) is "left". It is. Therefore, the lateral direction of the machine body corresponds to the lateral width direction of the traveling machine body.

[Overall structure of combine]
The self-removing combine shown in FIGS. 1 and 2 includes a machine body frame 1 and a traveling device 2 that supports the machine body frame 1. A boarding operation unit 3 is provided on the right side of the front of the machine body. The boarding operation unit 3 is provided with a steering operation tool (not shown) and a driver seat 4, and a cabin 5 that covers the steering operation tool and the driver seat 4. An engine (not shown) is provided below the driver's seat 4.

In front of the boarding operation unit 3, a harvesting unit 6 for harvesting crops in the field is provided. Behind the boarding operation unit 3, a grain storage tank 7 for storing grains and a grain discharging device 8 for discharging the grains in the grain storage tank 7 are provided. On the left side of the machine body, a feed chain 9 for sandwiching and conveying the cut grain culm is provided. On the left side of the grain storage tank 7, a threshing device 10 for threshing the cut culm transported by the feed chain 9 is provided. On the rear side of the threshing device 10, a straw processing device 18 is continuously provided. The straw processing device 18 receives the threshing-processed straw from the feed chain 9 and nips and conveys it to the rear. A straw cutting device 28 that cuts the straw conveyed by the straw processing device 18 with a cutter 29 is provided below the portion on the conveyance end side of the straw processing device 18.

[Harvest Department]
The harvesting section 6 is configured to have a multiple-row cutting specification (for example, a six-row cutting specification). The harvesting unit 6 includes a plurality (for example, seven) of weeding tools 13, a plurality (for example, six) of raising devices 14, a cutting device 15, and a conveying device 16. The weeding tool 13 weeds a crop in the field. The raising device 14 causes the crop to be cultivated. The cutting device 15 cuts the caused crop. The carrying device 16 holds the plant side of the cut culm and sandwiches the side of the tip of the culm, and carries it backward toward the threshing device 10 while changing the posture in the direction of the tip.

[Thrusher]
As shown in FIG. 3, in the threshing device 10, a threshing processing section C1 for treating the cut culm by the handling cylinder 11 and sorting down the objects to be treated by the receiving net 12, and below the threshing processing section C1. And a sorting processing unit C2 that sorts the objects to be processed leaked from the receiving net 12.

As shown in FIG. 3, walls 30F and 30R are provided at the front end and the rear end of the handling chamber 17, respectively. The front wall portion 30F constitutes the front wall portion of the handling room 17. The rear wall portion 30R constitutes a rear wall portion of the handling chamber 17.

As shown in FIG. 2, the right side portion of the threshing device 10 is configured by a right side wall 35R. The right side wall 35R extends to the rear end of the machine body. The left side portion of the threshing device 10 is configured by a left side wall 35L provided below the feed chain 9.

The threshing processing section C1 is provided with a handling barrel 11 inside a handling chamber 17 formed at an upper portion thereof, and a receiving net 12 below the handling barrel 11.

The handling cylinder 11 is rotatable around a rotation axis Y extending in the machine longitudinal direction. The receiving nets 12 are provided so as to face each other on the lower half side of the handling cylinder 11 about a half circumference. A dust exhaust fan 19 that discharges dust to the outside is provided behind the handling chamber 17.

The sorting processing unit C2 is located below the threshing processing unit C1.
In the sorting processing section C2, a swing sorting device 20 that swings and transfers the workpieces to the rear while sieving and sorting the objects to be processed, a sardines 21 that sends sorting wind to the swing sorting device 20, and a swing sorting device 20. The first item collecting section 22 for collecting the first item (single-grained grain etc.) sorted by the above, and the swing selecting apparatus provided below the swinging sorting apparatus 20 and behind the first thing collecting section 22. A second product collecting unit 23 that collects the second product (grains with branch stems, etc.) sorted by 20.

The first item recovery unit 22 is provided with a first screw 24 (an example of a lateral feed screw) that conveys the first item of grain (an example of grain removal) to the right (lateral feed). The first screw 24 is mounted in a suspended state from the right side wall 35R to the left side wall 35L of the handling chamber 17. At the right end of the first screw 24, a grain lifting device 25 that transports the grain of the first grain to the grain storage tank 7 is linked and linked. The first screw 24 can send the first grain to the grain storage tank 7 outside the threshing device 10.

The second product recovery unit 23 is provided with a second screw 26 (an example of a lateral feed screw) that carries (laterally feeds) the grain of the second product (an example of grain removal) to the right. The second screw 26 is mounted in a suspended state from the right side wall 35R to the left side wall 35L of the handling chamber 17. To the right end portion of the second screw 26, a second reduction device 27 that reduces the grain of the second product to the swing sorting device 20 is connected. The second screw 26 can send the second grain to the second reducing device 27 outside the threshing device 10.

[Oscillating sorter]
The swing selecting device 20 is configured as follows.
As shown in FIG. 3, the swing selecting device 20 includes a frame-shaped sheave case 50 formed in a rectangular shape in a plan view, a first Glen pan 51, a plurality of first sieve lines 52, a chaff sheave 53, and a straw rack 54. , And a second Glen pan 55, a Glen sieve 56, an auxiliary sorting plate 57, and a second sieving line 58.
The sheave case 50 is swingably driven by an eccentric cam type drive unit 59.

The upper surface side of the sheave case 50 is the processed object transfer surface 20A of the swing sorting device 20, and the processed object transfer surface 20A includes the processed object from the threshing processing section C1 and the second reducing device 27. Things are supplied.

The auxiliary sorting plate 57 is located at the upper rear portion of the chaf sheave 53, and is provided between the chaf sheave 53 and the workpiece transfer surface 20A with a vertical space such that an upstream workpiece can pass through. Has been.
As shown in FIG. 3, the auxiliary sorting plate 57 is provided in the threshing processing section C1 at a position near the rear portion of the handling chamber 17 and between the rear end portion of the receiving net 12 and the rear wall portion 30. It receives the object with a large amount of straw discharged from near the rear part and conveys it backward. The object having a large amount of discharged straw is passed to the straw rack 54 through the second sieving line 58 together with the object passing below the auxiliary sorting plate 57.

[First inspection port]
As shown in FIGS. 4 to 8, a first inspection port 61 is formed in the bottom 31 of the threshing device 10 below the second screw 26 of the second product recovery unit 23. The first inspection port 61 is provided from the left side portion of the threshing device 10 toward the inside of the machine body, and is formed in a rectangular shape in the present embodiment. The first inspection port 61 is closed by the first lid 71.

The first lid portion 71 is formed in a rectangular shape, and the engaging portion 73 is provided on the lower surface side. The bottom 31 of the threshing device 10 is provided with an engaged portion 32 that can engage with the engaging portion 73. The engaging portion 73 is provided on a bracket 74 attached to the rear side of the machine body. The engaging portion 73 and the engaged portion 32 (second lock portion 92 described later) are arranged on the side closer to the left side wall 35L in the axial X direction and are provided along the axial X direction. In this embodiment, the convex engaging portion 73 is configured to fit into the engaged portion 32 having the hole.

A support shaft portion 36 parallel to the axis X of the second screw 26 is fixed to the bottom portion 31 of the threshing device 10. The support shaft portion 36 is provided across the left side wall 35L and the right side wall 35R. The first lid portion 71 includes a supported portion 79 into which the support shaft portion 36 is inserted so that the support shaft portion 36 supports the front side in the machine body traveling direction. The first lid portion 71 is cantilevered by the support shaft portion 36 so as to be vertically swingable around the support shaft portion 36 parallel to the axis X via the supported portion 79. Further, the first lid portion 71 can be switched between an open position that swings downward to open the first inspection port 61 and a closed position that swings upward to close the first inspection port 61. (See FIGS. 9 and 10).

[Second inspection port]
As shown in FIG. 4, a second inspection port 62 is formed in the left side wall 35L of the threshing device 10 located on the outer peripheral side of the machine body, at a position above the first screw 24 of the first object recovery section 22. The second inspection port 62 is closed by the second lid 72. The second lid portion 72 is fixed to the peripheral portion of the second inspection port 62 by a screw member 63 or the like, and is configured to be attachable to and detachable from the second inspection port 62. By visually inspecting the first object recovery part 22 and the second object recovery part 23 from the second inspection port 62 by removing the second lid part 72 from the second inspection port 62 and opening the second inspection port 62. You can

[Lock mechanism]
As shown in FIGS. 4 to 10, the second item recovery unit 23 has a lock mechanism 80 capable of switching between a locked state for fixing the first lid 71 at the closed position and a released state for releasing the locked state. It is provided. The lock mechanism 80 includes a lock operation tool 81 having a base portion 82 fixed to the first lid portion 71, an engagement portion 73 provided on the first lid portion 71, and a bracket 32a on the bottom portion 31 of the threshing device 10. It is constituted by the engaged portion 32 provided. The lock operation tool 81 has a base portion 82 provided inside the machine body along the axial center X direction, and extends from the base portion 82 to the outside of the left side wall 35L. The base portion 82 is fixed to a frame portion 75 extending below the first lid portion 71 by using a fixing member 75a such as a bolt. Thereby, the first lid 71 and the lock operation tool 81 are integrally configured. The first lid 71 is provided with a plurality of reinforcing frames 76 at the bottom thereof.

The lock operation tool 81 is provided outside the left side wall 35L (outside the machine body). The lock operation tool 81 can push and pull the first lid portion 71, and can rotate the first lid portion 71 around the support shaft portion 36. The left side wall 35L is formed with an arc-shaped long hole portion 37 that guides the movement of the lock operation tool 81 when the first lid portion 71 is rotated around the support shaft portion 36.

As shown in FIGS. 5 to 8, the lock mechanism 80 has a movement restricting portion 86 that restricts the movement of the first lid portion 71 in the axial center X direction within a predetermined range. In the present embodiment, the movement restricting portion 86 is configured by a plate-shaped frame member 87 that is assembled at a midway portion in the longitudinal direction of the lock operation tool 81. Accordingly, when the lock operation tool 81 is pushed, the frame member 87 contacts the outer surface of the left side wall 35L, and the movement of the first lid portion 71 to the right side wall 35R is restricted.

The movement restricting portion 86 may be configured by assembling a member (not shown) equivalent to the frame member 87 at a midway portion in the longitudinal direction of the base portion 82 arranged inside the left side wall 35L. With this configuration, when the lock operation tool 81 is pulled, the movement restricting portion 86 contacts the inner surface of the left side wall 35L, and the movement of the first lid portion 71 to the left side wall 35L is restricted. The above configuration is an example of the movement restricting unit 86, and the movement restricting unit 86 may have another configuration as long as it restricts the movement of the first lid 71 in the axial center X direction within a predetermined range. ..

The frame member 87 assembled to the lock operation tool 81 is provided with a hole 88 for fixing the position of the lock operation tool 81 in the axial center X direction. By inserting the fixing member B into the hole 88 and fixing the frame member 87 to the hole (not shown) provided in the left side wall 35L, the position of the lock operation tool 81 in the axial center X direction is fixed.

The lock mechanism 80 includes a first lock portion 91 provided on the side farther from the lock operation tool 81 and a second lock provided on the side closer to the lock operation tool 81 in the direction along the axis X of the first lid portion 71. And a portion 92.

The first lock portion 91 includes one end portion 71a of the first lid portion 71, a mounting portion 93 provided on the inner surface of the right side wall 35R, and a guide portion 94. As shown in FIG. 11, the mounting portion 93 holds the one end portion 71a of the first lid portion 71 at the closed position. One end of the mounting portion 93 is fixed to the right side wall 35R, and a guide portion 94 that slopes downward is continuously provided at the other end of the mounting portion 93. The guide portion 94 guides the one end portion 71 a of the first lid portion 71 to the placement portion 93 from a position lower than the placement portion 93. The second lock portion 92 includes an engaging portion 73 provided on the first lid portion 71 via a bracket 74 and an engaged portion 32 provided on the bottom portion 31.

The lock operation tool 81 can be engaged with and disengaged from the engaged portion 32 by moving the lock operation tool 81 along the direction of the axis X. In the lock mechanism 80, in the first lock portion 91, the one end portion 71 a of the first lid portion 71 is placed on the placement portion 93, and in the second lock portion 92, the engaging portion 73 is the engaged portion 32. The first lid 71 is fixed to the closed position by engaging with. When the lock mechanism 80 is brought into the locked state, the first lock portion 91 functions first, and then the second lock portion 92 functions. That is, after the one end portion 71 a of the first lid portion 71 is placed on the placing portion 93, the engaging portion 73 of the first lid portion 71 engages with the engaged portion 32 of the bottom portion 31. In addition, in the present embodiment, the one end portion 71 a of the first lid portion 71 has the contact portion 78 that contacts the mounting portion 93 and the guide portion 94. The contact portion 78 is formed below the end portion 77 of the first lid portion 71, and the end portion 78 a is formed along the upper surface of the mounting portion 93.

The lock mechanism 80 can release the locked state by the following procedure (see FIGS. 5 and 10). First, in the lock operation tool 81, a fixing member (not shown) is removed from the hole portion 88 of the frame member 87 to release the position fixing in the X axis direction. After that, the engaging portion 73 is disengaged from the engaged portion 32 by the pulling operation of the lock operation tool 81, and the one end portion 71 a of the first lid portion 71 is not placed on the placing portion 93 and the guide portion 94. When moved, the first lid 71 is released from being fixed in the closed position. When the lock mechanism 80 shifts to the released state, the first lock portion 91 is released first, and then the second lock portion 92 is released. That is, after the one end portion 71 a of the first lid portion 71 disengages from the placement portion 93 and the guide portion 94, the engaging portion 73 of the first lid portion 71 disengages from the engaged portion 32 of the bottom portion 31. Furthermore, the first lid portion 71 swings downward around the support shaft portion 36 due to its own weight, and comes to the open position where the first inspection port 61 is opened (see FIG. 10).

Further, the lock mechanism 80 can bring the first lid portion 71 into the locked state by the following procedure. The first lid portion 71 in the open position is swung upward around the support shaft portion 36 by the lock operating tool 81. As a result, the first lid 71 can be moved to the closed position. After that, the lock operation tool 81 is pushed along the axial center X direction of the second screw 26 to lock the first lid portion 71 in the first lock portion 91 and the second lock portion 92, and the first lock portion 91 is locked. The lid 71 is fixed in the closed position (see FIG. 9).

The bottom portion 31 of the threshing device 10 includes a guide rail 33 that guides the movement of the first lid portion 71 in the axial center X direction. The guide rails 33 are provided below the bottom portion 31 and support both end sides of the first lid portion 71 in the direction orthogonal to the moving direction (axis X direction). Accordingly, the first lid 71 can be moved smoothly along the guide rail 33.

[Another embodiment]
Hereinafter, another embodiment in which the above embodiment is modified will be described. The following other embodiments can be applied in combination with a plurality of the above embodiments as long as no contradiction occurs.

In the above embodiment, in the bottom 31 of the threshing device 10, the first inspection port 61 is formed below the second screw 26 of the second material recovery unit 23, and the first lid 71 corresponding to the first inspection port 61 and The lock mechanism 80 including the lock operation tool 81 for operating the first lid portion 71 has been described. Instead of this, the configuration of the first inspection port 61, the first lid part 71, and the lock mechanism 80 may be adopted in the first item recovery part 22. In addition, the configurations of the first inspection port 61, the first lid portion 71, and the lock mechanism 80 may be adopted in both the first item recovery unit 22 and the second item recovery unit 23.

INDUSTRIAL APPLICABILITY The present invention is applicable not only to self-removing combine harvesters, but also to ordinary combine harvesters and harvesters such as sugarcane harvesters, corn harvesters, and feed harvesters.

10: Threshing device 22: First thing collecting part 23: Second thing collecting part 24: First screw (lateral feed screw)
26: No. 2 screw (transverse feed screw)
31: Bottom part 32: Engaged part 33: Guide rail 35L: Left side wall 35R: Right side wall 36: Spindle part 61: 1st inspection port (inspection port)
71: First lid (lid)
71a: One end 73: Engagement part 80: Lock mechanism 81: Lock operation tool 82: Base part 86: Movement control part 91: First lock part 92: Second lock part 93: Placement part 94: Guide part C1: Threshing Processing unit C2: Selection processing unit X: Shaft core

Claims (5)

A threshing processing unit that performs a handling process by a handling cylinder and leaks and sorts an object to be processed by a receiving net, and a sorting process that is provided below the threshing processing unit and performs a sorting process on an object to be leaked from the receiving net. And a threshing device having
An oscillating sorting device that swings and sorts the objects to be processed to the sorting processing section while transferring the processed objects to the rear, and a grain-removed grain that is provided below the oscillating sorting device and is fed laterally. Having a lateral feed screw that conveys and sends out to the outside of the threshing device,
An inspection port formed below the traverse screw at the bottom of the threshing device,
A lid that covers the inspection port,
A lock mechanism having a lock operation tool, and a lock mechanism capable of switching between a lock state for fixing the lid portion to a closed position by operation of the lock operation tool and a release state for releasing the lock state;
The lid is cantilevered by the support shaft so as to be vertically swingable around a support shaft parallel to the axis of the transverse feed screw, and is swung downward to open the inspection port. It is possible to switch between an open position for closing and a closed position for swinging upward to close the inspection port,
The said lock mechanism is a harvester comprised so that the said lock state and the said release state may be switched by moving the said lid part along the said axial direction by operation of the said lock operation tool. In the lock mechanism, the lock operation tool is provided outside the machine body,
The harvesting machine according to claim 1, wherein the lock mechanism has a first lock portion provided on a side far from the lock operation tool and a second lock portion provided on a side close to the lock operation tool. The harvesting machine according to claim 2, wherein the lock mechanism is configured such that the second lock portion is released earlier than the first lock portion. In the lock mechanism, the first lock portion is provided continuously with the one end portion of the lid portion, the placement portion that holds the one end portion of the lid portion at the closed position, and the placement portion. A guide portion that guides the one end of the lid portion to the placement portion from a position lower than the placement portion, and the second lock portion is an engagement portion provided on the lid portion; The harvester according to claim 2 or 3, which is configured by an engaged portion provided on a bottom portion. The harvesting machine according to any one of claims 1 to 4, wherein the lock mechanism includes a movement restricting portion that restricts movement of the lid portion within a predetermined range.

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