JP2021168706A5 - - Google Patents

Description

combine

The present invention relates to a combine provided with a grain tank for storing harvested grains.

Conventionally, the grain tank has been configured to store grains in a storage space closed by a wall formed in a box shape (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2017-184768

In the above-mentioned conventional configuration, since the space is formed in a state where the grain tank is closed in a box shape, for example, dust and residual grains adhering to and accumulating on the inner wall surface of the storage space after the harvesting work is completed. There was a disadvantage that it was difficult to perform maintenance work inside the tank such as cleaning work to remove grains. In order to perform maintenance work, for example, an opening closed by an openable lid is formed on a part of the upper surface of the grain tank so that the work can be performed from the upper side of the grain tank through this opening. However, it was difficult to work from above on a large grain tank.

Therefore, in order to eliminate such a disadvantage, it is conceivable that the side portion of the grain tank can be greatly opened. When the side portion is wide open in this way, there is a concern that grains may leak from the opening / closing portion.

Therefore, it has been desired to reduce the risk of grain leakage when the grain tank is in a state where it can be stored, while facilitating maintenance work inside the grain tank.

The characteristic configuration of the combine according to the present invention is that a grain tank for storing grains is provided in the internal storage space, and the side plate in the grain tank can rotate around the vertical axis core with respect to the tank main body. The side plate is supported, and by rotating around the vertical axis core, the opening formed in the side portion of the tank main body is closed to allow the storage of grains, and through the opening. It is provided so as to be switchable to an open state in which the storage space is opened to the outside, and a plurality of locking mechanisms for holding the side plate in the closed state are provided. The locking mechanism includes the tank main body and the side plate. A locking portion provided on one of the locking portions and a locked portion provided on the other of the tank main body portion and the side plate in a state corresponding to the locking portion are provided, and the locking portion is provided. A plurality of types of locking mechanisms having different locking operations with respect to the locked portion of the portion are provided at different positions from each other .

According to the present invention, when the harvesting operation is performed, the harvested crop can be stored in the storage space inside the grain tank by switching the side plate of the grain tank to the closed state. When the harvesting work is completed, by switching the side plate of the grain tank to the open state, the storage space is opened to the outside through the opening formed on the side, so maintenance work such as cleaning can be easily performed. Become.

In the present invention, as the plurality of types of the locking mechanism, a rotary locking mechanism in which the locking portion engages with the locked portion by rotation and a sliding movement of the locking portion in the vertical direction wherein it is preferable that the sliding locking mechanism that engages the engaged portion, is that feature by.

In the present invention, the rotary locking mechanism is provided at an upper and lower intermediate position of the grain tank, and two sliding locking mechanisms are arranged vertically with the rotary locking mechanism interposed therebetween. It is preferable to have.

In the present invention, the upper sliding locking mechanism locks to the locked portion by sliding the locking portion upward, and the locking portion slides downward. The sliding locking mechanism on the lower side is configured to be released from the locked portion by sliding the locked portion downward to lock the locked portion. Moreover, it is preferable that the locking portion is configured to be released from the locked portion by sliding upward .

It is an overall side view of a combine. It is the whole plan view of a combine. It is a perspective view of a grain tank. It is a perspective view of the grain tank in the maintenance state. It is a vertical sectional front view of a grain tank. It is a cross-sectional plan view of a grain tank. It is a vertical sectional front view of the opening / closing wall part at the time of switching from an open state to a closed state. It is a vertical sectional front view of the opening and closing wall part in a closed state. It is a perspective view of the upper part of the front part of the opening / closing wall part. It is a vertical sectional front view which shows the locked state between the upper rod and a guide holding member. It is a vertical sectional front view which shows the attachment state of the 2nd auxiliary frame body. It is a cross-sectional plan view which shows the support structure of the member for holding the opening and closing wall part in an open state. It is a vertical sectional side view of the operation tool arrangement part. FIG. 13 is a sectional view taken along line XIV-XIV of FIG. 13 is a cross-sectional view taken along the line XV-XV of FIG. It is an exploded perspective view which shows the support structure of a lid body.

Hereinafter, a case where the embodiment of the present invention is applied to a head-feeding combine will be described with reference to the drawings.

〔overall structure〕
As shown in FIGS. 1 and 2, the combine according to the present invention is provided with a cutting section 3 for cutting planted culms at the front portion of a traveling machine 2 that is self-propelled by a pair of left and right crawler traveling devices 1. .. On the right side of the front part of the traveling machine body 2, a driving unit 5 whose circumference is covered with a cabin 4 is provided.
Behind the driving unit 5, a threshing device 6 for threshing the grain culms cut by the cutting unit 3 and a grain tank 7 for storing the grains obtained by the threshing process are arranged in the horizontal direction. Deployed in state. The grain tank 7 is located on the right side of the machine, and the threshing device 6 is located on the left side of the machine. That is, the driving unit 5 is located in front of the grain tank 7. An engine E is provided below the driver's seat 8 in the driver's unit 5. A grain discharging device 9 for discharging the grains stored in the grain tank 7 to the outside of the machine is provided at the rear of the traveling machine 2 and behind the grain tank 7. The rear part of the threshing device 6 is provided with a waste straw processing device 20 for shredding the straw.

In this embodiment, when defining the front-rear direction of the aircraft, it is defined along the traveling direction of the aircraft in the working state, and when defining the left-right direction of the aircraft, the left and right are defined in the state of the traveling direction of the aircraft. .. That is, the direction indicated by the reference numeral (F) in FIGS. 1 and 2 is the front side of the machine, and the direction indicated by the reference numeral (B) in FIGS. 1 and 2 is the rear side of the machine body. The direction indicated by the reference numeral (L) in FIG. 2 is the left side of the aircraft, and the direction indicated by the reference numeral (R) in FIG. 2 is the right side of the aircraft.

The harvesting unit 3 was triggered by a weeding tool 10 that guides the root of the planted culm to be harvested, and a plurality of triggering devices 11 that cause the planted culm to be cultivated in a vertical position. Varican-type cutting device 12 that cuts the root of the planted culm, and vertical transportation that transports the harvested culm backward while changing the posture so that it gradually falls sideways from the vertical position and supplies it to the grain removal device 6. The device 13 and the like are provided. The upper side of the vertical transfer device 13 is covered with a dustproof cover 14.

Although not shown, the threshing device 6 performs a threshing process by handling the tip side in a handling room while sandwiching and transporting the stock root side of the supplied harvested culm by a threshing feed chain. The processed product after the threshing treatment is sorted into grains, straw waste and the like in the lower sorting section. The grains are carried out to the outside on the right side of the threshing device 6 by the first thing transport screw (not shown), and then lifted by the grain raising conveyor 15 and transported to the inside of the grain tank 7. The grain tank 7 stores the grains sent from the threshing device 6. After that, the grains stored in the grain tank 7 are carried out by the grain discharging device 9.

The bottom of the grain tank 7 is provided with a bottom screw 16 for transporting grains that are rotated and stored around the front-rear axis toward the rear side of the machine body. The grain discharging device 9 receives the grains carried out from the bottom screw 16 and conveys the grains upward as a vertical feeding screw conveyor 17 and a vertical feeding screw conveyor 17 thereof. A lateral feed screw conveyor 19 for transporting grains laterally from a base end portion connected to an upper end portion to a discharge port 18 at the tip end is provided.

Although the support configuration will not be described in detail, the entire tank of the grain tank 7 is swingably supported around the vertical axis X, which is the rotary axis of the vertical feed screw conveyor 17. That is, as shown in FIGS. 1 and 2, it is possible to switch between a normal storage state stored on the side of the machine body and a maintenance state of extending and swinging outward on the side of the machine body as shown in FIGS. 1 and 2. In addition, it is supported so as to be swingable around the vertical axis X. The posture of the grain tank 7 is maintained by a position holding mechanism (not shown) in the stored state.

The grain-raising conveyor 15 lifts grains to near the upper end by a screw conveyor 28, and then feeds the grains to a tank through an opening 25 formed in the grain tank 7 by a delivery blade 24 provided at the upper end. Release toward the inward side.

[Grain tank]
Next, the grain tank 7 will be described.
As shown in FIGS. 4, 5 and 6, the grain tank 7 is surrounded by the front, rear, left and right sides, and a grain storage space Q is formed. A part of the right wall portion 30 (opening / closing wall portion 31 described later) constituting the right side surface of the grain tank 7 is in a closed state in which the storage space Q is closed to enable storage of grains, and a storage space. It is provided so as to be switchable to an open state in which the Q is opened to the outside and the worker can access the storage space Q.

The other side surfaces of the grain tank 7 except the right side surface, that is, the front side surface, the rear side surface, the left side surface, and the upper side surface are all formed by a wall member in a state of being connected so as to be connected in a series, and the tank main body portion. 32 is configured. As shown in FIG. 6, the left wall portion 33 of the tank main body portion 32 is formed with a recessed portion 34 for deploying the frying conveyor 15 in a state of being inserted.

The right side wall portion 30 of the grain tank 7 is located so as to face the right lateral side outer side of the traveling machine body 2.
The right side wall portion 30 can open a region extending from the upper part to the lower part and from the front part to the rear part. That is, as shown in FIG. 4, the right side wall portion 30 is formed with an opening 35 in a state of being greatly opened so as to open a region extending from the upper part to the lower part and from the front part to the rear part. The opening 35 that is greatly opened in this way is closed by an opening / closing wall portion 31 (an example of a side plate) that can be opened and closed to form a storage space Q inside.

As shown in FIG. 4, the right side wall portion 30 includes an opening / closing wall portion 31 and a frame-shaped portion 36 surrounding the opening 35, and the frame-shaped portion 36 is connected to another side surface and is a tank. It constitutes a part of the main body 32. As shown in FIG. 8, the opening / closing wall portion 31 is switched to the storage state, and the opening / closing wall portion 31 and the frame-shaped portion 36 are integrally connected as described later to form the right side wall portion 30. ..

The opening / closing wall portion 31 is supported by the tank main body portion 32 so as to be swingable and openable around the vertical axis core Y1 located behind the grain tank 7. At the right end of the rear side wall 38 of the tank body 32, two rotation support portions 39 are provided at intervals in the vertical direction, and the rotation support portion 39 allows the opening / closing wall portion 31 to have a vertical axis core Y1. It is configured to support swingably around.

Next, a configuration for strengthening the strength of the tank main body 32 will be described.

As shown in FIGS. 4 and 6, a front-rear frame 40 extending in the front-rear direction of the machine body is provided over the front part and the rear part of the tank main body 32. The front-rear frame 40 is formed in a cylindrical shape and is provided so as to extend over the front side wall portion 41 and the rear side wall portion 38 in the tank main body portion 32. The front-rear frame 40 is provided in a state of being located in the upper and lower middle portions of the right end portion of the machine body inside the grain tank 7.

The front-rear frame 40 and the bracket 44 attached to the left side wall 33 are attached to the front-rear frame 40 at a position closer to the front side than the front-rear center portion and at a position closer to the rear side than the front-rear center portion. A first auxiliary frame body 45 made of a round bar member to be connected is provided.

As shown in FIG. 4, when the opening / closing wall portion 31 is in the open state, an opening degree holding tool 46 for holding the opening / closing wall portion 31 in the open state is provided. The opening holder 46 is a rod-shaped member with both ends bent, one end (support end) is held by the support plate 47, and the other end (free end) is the frame of the tank body 32. It is inserted into the hole of the connector 48 attached to the shaped portion 36 (see the virtual line in FIG. 4). As a result, the opening / closing tool 46 holds the opening / closing wall portion 31 in an open state. When the opening holder 46 is not used, it is held by a clip member (not shown) in a hanging posture as shown by a solid line in FIG.

Further, an opening prevention wire 50 for preventing the opening / closing wall portion 31 from opening at a predetermined angle (for example, 90 degrees) or more is provided. The release prevention wire 50 is a flexible metal wire, one end of which is connected to a pin 51 provided in the connector 48 of the tank body 32, and the other end of which is provided in the opening / closing wall 31. It is connected to the pin 53. When the opening / closing wall portion 31 is held by the opening degree holder 46 or the opening / closing wall portion 31 is closed, the opening / closing wall portion 31 is in a slackened state.

When the opening / closing wall portion 31 is held in the open state by the opening opening holder 46 or the opening prevention wire 50, an unreasonable force is applied in the direction of further opening with respect to the opening / closing wall portion 31 by, for example, wind. If this is applied, the frame-shaped portion 36 of the tank body 32 to which the opening holder 46 and the opening prevention wire 50 are connected may be deformed. Therefore, the following second auxiliary frame body 54 is provided.

As shown in FIGS. 5, 11 and 12, the second auxiliary frame body 54 is composed of a strip, and the bracket 44 on the left side wall portion 33 side to which the first auxiliary frame body 45 on the rear side is connected and the frame. It is erected and connected to the connecting tool 48 on the side of the shaped portion 36. The second auxiliary frame body 54 prevents deformation of the tank body 32 side due to the unreasonable force when an unreasonable force is applied to the opening / closing wall portion 31 in the direction of further opening.

Next, a configuration for strengthening the opening / closing wall portion 31 will be described.

As shown in FIG. 5, the opening / closing wall portion 31 is formed in a gentle arc shape in the front-rear direction. As shown in FIGS. 4 and 5, an upper side reinforcing portion 56 is provided at a portion on the upper side of the opening / closing wall portion 31 on the inner side of the tank. The upper reinforcing portion 56 is formed by bending a plate material into a substantially U-shaped cross section, and an upper support 57 extending in the front-rear direction is integrally connected to the wall surface of the opening / closing wall portion 31 over the entire front-rear direction to form a square tube. It constitutes a reinforcing part.

A lower reinforcing portion 59 is provided at a lower portion of the opening / closing wall portion 31 on the inner side of the tank.
The lower side reinforcing portion 59 is configured by connecting a first reinforcing body 59a formed by bending a plate material into a substantially U shape and a flat plate-shaped second reinforcing body 59b in a substantially tubular shape (FIG. 7, FIG. 8). The lower reinforcing portion 59 is integrally connected to the wall surface of the opening / closing wall portion 31 over the entire area in the front-rear direction. As shown in FIG. 6, at the rear end of the opening / closing wall portion 31, a square tubular vertical reinforcing portion 58 for supporting the entire opening / closing wall portion 31 via the rotation support portions 39 on both the upper and lower sides is provided. It is prepared.

On the inner side of the tank of the opening / closing wall portion 31, a plurality of vertical support plates extending in the vertical direction are provided over the upper reinforcing portion 56 and the lower reinforcing portion 59 at intervals in the front-rear direction. .. Specifically, as shown in FIGS. 4 and 6, the vertical support plate is set more than the first vertical support plate 60 located at the front side end portion of the opening / closing wall portion 31 and the front side end portion. A second vertical support plate 61 located closer to the rear side by the width and a third vertical support plate 62 located in the front-rear intermediate portion are provided. Each of the plurality of vertical support plates 60, 61, 62 is formed of a plate having an L-shaped cross section, and is integrally connected to the inner side surface of the opening / closing wall portion 31 on the inner side of the tank. The upper reinforcing portion 56 is provided over the entire width of the opening / closing wall portion 31 in the front-rear direction. The lower side reinforcing portion 59 is provided from the second vertical support plate 61 to the rear side end portion.

Next, a connecting structure for connecting the opening / closing wall portion 31 to the tank main body portion 32 will be described.
The center-side portion of the closing wall portion 31, locking member 63 for locking in the longitudinal direction frame 40 (an example of engaging portions) are provided. By swinging the operating lever 64 as an operating tool, the locking member 63 can be switched between a locked state in which the locking member 63 is caught and locked by the front-rear frame 40 and a released state in which the locking member is released. The locking member 63 is composed of a hook-shaped member having a substantially U-shaped locking groove 65. Therefore, the front-rear frame 40 functions as a locked portion corresponding to the locking member 63.

As shown in FIGS. 4 and 6, a rotation shaft 66 that is integrally rotated by the swing operation of the operation lever 64 is provided, and the locking member 63 is integrally rotatably connected to the rotation shaft 66. .. The locking member 63 is switched between the locked state and the released state by the rotation of the rotating shaft 66 accompanying the swinging operation of the operating lever 64.

The rotation shaft 66 is provided at a position close to the inside of the tank of the opening / closing wall portion 31 so as to extend in the front-rear direction over the front-rear intermediate portion and the front portion of the opening / closing wall portion 31. The rotation shaft 66 is inserted through the insertion holes (not shown) formed in the second vertical support plate 61 and the third vertical support plate 62, respectively, and the second vertical support plate 61 and the second rotation shaft 66 are inserted. It is rotatably supported by the three vertical support plates 62.

The operating lever 64 is provided at the front end of the rotating shaft 66 in a state of being located between the first vertical support plate 60 and the second vertical support plate 61. An opening 67 is formed in the opening / closing wall portion 31 at a position corresponding to the operation lever 64 between the first vertical support plate 60 and the second vertical support plate 61 (see FIG. 1). As shown in FIGS. 6, 13, 14 and 15, the opening 67 can be switched between a state of being covered by a vertically slidable lid 68 and a state of being opened. When the lid 68 is slid upward, the operation lever 64 faces outward through the opening 67, and the operator can manually operate the lid 68 from the outside of the machine.

As shown in FIGS. 5 and 8, when the operation lever 64 is switched to the vertical posture located inside the opening / closing wall portion 31, the locking member 63 is locked to the front / rear facing frame 40, and the opening / closing wall in the stored state is engaged. The swing-side end of the portion 31 and the tank main body portion 32 are connected to each other. As shown in FIG. 7, when the operating lever 64 is manually pulled outward through the opening 67 and the operating lever 64 is switched to the tilted posture in which the operating lever 64 is tilted outward, the locking member 63 is moved to the front-rear frame 40. Is released, and the connection between the swing-side end of the opening / closing wall portion 31 and the tank main body portion 32 is released. As described above, the rotary locking mechanism is configured by the configuration in which the locking member 63 is hooked and locked to the front-rear frame 40.

[Position holding mechanism]
In this grain tank 7, the opening / closing wall portion 31 is held in a stored state, and the opening / closing wall portion 31 is pulled toward the tank main body portion 32 to eliminate a gap and improve the closedness of the storage space. IH is provided. The configuration will be described below.

As shown in FIGS. A plurality of rods 69 (an example of another locking portion) interlocked with 66 are provided. The tank main body 32 is provided with a plurality of guide holding members 70 as locked portions corresponding to the rod 69.

At a portion of the guide holding member 70 corresponding to the inner peripheral side of the opening 35 of the tank main body 32, an inclined portion 71 that inclines toward the outer peripheral side toward the inner peripheral side is formed. At a portion of the guide holding member 70 corresponding to the outer peripheral side of the opening 35, a receiving holding portion 72 extending in the vertical direction in a series continuous state from the inclined portion 71 is formed.

When the operating lever 64 is switched from the tilted posture to the vertical posture so that the locking member 63 is in the locked state, the rod 69 is slid and guided by the tilted portion 71 of the guide holding member 70. The opening / closing wall portion 31 is configured to be attracted to the tank main body portion 32 side. When the operating lever 64 is switched to the vertical posture, the rod 69 is received by the receiving holding portion 72, and the opening / closing wall portion 31 is maintained in a state of being pulled toward the tank main body portion 32 side.

To add an explanation, in view from the side, a total of four rods 69 are provided at the front and rear ends of the rotating shaft 66, and at the upper and lower portions of the opening / closing wall portion 31, respectively. It is equipped so that it can move only in the vertical direction. As shown in FIGS. 4 and 5, the two upper rods (upper rods) 69 located on the upper side pass through the insertion holes formed in the upper support member 73 and the upper reinforcing portion 56, respectively. It is provided and is supported so that it can be moved only in the vertical direction. The two rods (lower rods) 69 located on the lower side are moved only in the vertical direction by the lower support member 74 formed in a substantially U shape in the front-rear direction and having an insertion hole through which the rod 69 is inserted. It is supported as much as possible.

As shown in FIG. 10, the upper support 57 in the upper reinforcing portion 56 is formed with an insertion hole 75 through which the rod 69 is inserted in the vertical direction, and the insertion hole 75 is engaged with the guide holding member 70. It is preferable to form the tank body as close to the tank body 32 as possible so that the mating can be performed well. By the way, when the upper support 57 is formed, if the plate material is bent in a U shape in advance and then the insertion hole 75 is formed, the insertion hole 75 may become too large at the bent portion due to the tensile force accompanying the bending process. .. Therefore, when the upper support 57 is created, the insertion hole 75 is first formed at the stage of the flat plate-shaped material, and then the bending process is performed. Further, in order to reinforce the strength of the upper reinforcing portion 56, as shown in FIGS. 9 and 10, a reinforcing plate 76 is provided in the inner inner part of the U-shaped recessed portion.

As shown in FIGS. 4 and 5, an operating body 77 as a balance arm that rotates integrally is connected to both front and rear ends of the rotating shaft 66. In the operating body 77, an upper rod 69 is pivotally connected to one end in the longitudinal direction via a link member 78. Operation body 77 is in the other end portion in the longitudinal direction, the lower side of the rod 69 via the link member 78 is pivotally connected. The rotation shaft 66 rotates with the operation of the operation lever 64, and the rod 69 slides and moves in the vertical direction via the operation body 77 and the link member 78.

As shown in FIGS. 4 and 5, a plurality of guide holding members 70 are provided at a position where the rod 69 slides in the frame-shaped portion 36 of the tank main body portion 32. The two guide holding members 70 located on the upper side are provided at a position on the outside of the tank in the frame-shaped portion 36. The two guide holding members 70 located on the lower side are provided at a position inside the tank in the frame-shaped portion 36. The two guide holding members 70 located on the upper side are provided with an inclined surface such that the lower end portion is located on the side away from the frame-shaped portion 36 and the lower end portion is closer to the frame-shaped portion 36 toward the upper side. The two guide holding members 70 located on the lower side are provided with an inclined surface such that the upper end portion is located on the side away from the frame-shaped portion 36 and the upper end portion approaches the frame-shaped portion 36 toward the lower side.

As shown in FIGS. 4, 5, 7, 8 and 10, each of the plurality of guide holding members 70 is provided with two screw shafts 79 as fasteners for inserting the frame-shaped portion 36, and is screwed to the screw shaft 79. It is fixed to the frame-shaped portion 36 by tightening with a matching nut 80. By changing the tightening position of the screw shaft 79 with respect to the frame-shaped portion 36 by the nut 80, the plurality of guide holding members 70 can change and adjust the positions of the tank main body portion 32 and the opening / closing wall portion 31 in the approaching / separating direction. It is provided.

When the operating lever 64 is switched to the vertical posture, the upper rod 69 moves upward and the lower rod 69 moves downward via the operating body 77 and the link member 78. The upper rod 69 is slidably guided by the upper guide holding member 70 provided in the tank main body 32, and the lower rod 69 is slid to the lower guide holding member 70 provided in the tank main body 32. You will be guided. Due to the sliding guidance between the rod 69 and the guide holding member 70, the opening / closing wall portion 31 and the tank main body portion 32 are relatively displaced, and the opening / closing wall portion 31 is pulled toward the tank main body portion 32. As a result, the opening / closing wall portion 31 and the frame-shaped portion 36 around the opening 35 of the tank main body portion 32 are in close contact with each other so that grains can be stored. As described above, the slide type locking mechanism is configured by the configuration in which the rod 69 is locked to the guide holding member 70.
Therefore, a plurality of locking mechanisms having different locking operations on the locked portions (front-rear frame 40 and guide holding member 70) of the locking portions (locking member 63 and rod 69) are provided at different positions from each other. ..

A sealing member 81 is provided at a contact point between the opening / closing wall portion 31 and the peripheral edge portion of the opening 35 in the frame-shaped portion 36. In particular, as shown in FIG. 4, a rubber weather strip having a large amount of elastic deformation and capable of improving airtightness is provided at the lower edge portion and the swing outer peripheral side edge portion of the peripheral edge portion of the opening 35. A seal member 81 composed of the above is provided.

As shown in FIG. 7, the weather strip type sealing member 81 as described above is provided in a state of projecting toward the inner peripheral side at the peripheral edge of the opening 35 in the tank main body 32. Then, when the opening / closing wall portion 31 is switched from the maintenance state (open state) to the storage state (closed state), it is possible to prevent the lower rod 69 from coming into contact with the seal member 81 and being damaged. It has become.

That is, as the opening / closing wall portion 31 switches from the maintenance state (open state) to the storage state (closed state), the lower rod 69 enters the storage space through the opening 35 to the position corresponding to the guide holding member 70. It is provided so that it can enter. Then, when the locking member 63 is at the boundary position between the locked state and the unlocked state, the rod 69 is brought into the boundary position between the locked state and the unlocked state or the unlocked state. When the opening / closing wall portion 31 is moved from the open state to the closed state side in a state where the locking member 63 is located at the corresponding position and is located on the locked state side of the boundary position, the rod and the corresponding guide holding member are moved. The locking member 63 is configured to contact the corresponding front-rear frame 40 as a locked portion before contacting the 70.

To add an explanation, as shown in FIGS. 4, 7, and 8, the locking member 63 is formed so that the locking groove 65 is deep. Then, when the locked state is shown in FIG. 8, the front-rear frame 40 is locked into the deep locking groove 65. As shown in FIG. 7, if the locking member 63 is not caught by the front-rear frame 40, the opening / closing wall portion 31 can be moved from the open state to the closed state. The boundary position is such that the locking member 63 does not get caught in the front-rear frame 40, and when the locking member 63 is further raised, the locking is released.

As shown in FIG. 7, when the locking member 63 is in the boundary position, the lower rod 69 is configured such that the lower end portion is located substantially the same as or above the upper end portion of the seal member 81. There is.
That is, when the locking member 63 is in the boundary position or the unlocked state, the lower rod 69 is in a position where it does not come into contact with the seal member 81, and the rod 69 moves with the opening / closing operation of the opening / closing wall portion 31. It does not interfere with the seal member 81 and is less likely to cause damage.

As shown in FIG. 6, the lever storage area sandwiched between the first vertical support plate 60 and the second vertical support plate 61 of the opening / closing wall portion 31 and the storage space Q are partitioned. Even if grains are stored in the storage space Q, there are no grains in the lever storage area provided with the operation lever 64, and the operation can be easily performed.

A detection sensor S for detecting whether or not the opening / closing wall portion 31 has been switched to the closed state is provided in the upper portion of the frame-shaped portion 36 of the tank main body portion 32 on the front portion side of the machine body. The detection sensor S is configured to detect the closed state by the contact action of the object to be detected 87 provided on the opening / closing wall portion 31. Although not shown, if the detection sensor S does not detect the closed state, the start of the engine E is restrained, and if the closed state is not detected during the harvesting operation, the engine E is stopped. There is.

[Cover support structure]
The support structure of the lid 68 capable of opening and closing the opening 67 formed in the opening / closing wall portion 31 of the lever storage area as described above will be described.
As shown in FIG. 15, a strip-shaped sliding member extending in the vertical direction at a position close to the opening / closing wall portion 31 in each of the first vertical support plate 60 and the second vertical support plate 61. 89 is provided. The lid body 68 is slidably supported in the vertical direction while being sandwiched between the sliding members 89 on both the front and rear sides and the sliding surface on the opening / closing wall portion 31 side.

The sliding member 89 has a thin shape in order to prevent interference with other objects. Therefore, due to a dimensional error of the lid 68 or the like, there is a possibility that the lid 68 will fall off in a configuration in which only the lid 68 is slid. Therefore, as shown in FIGS. 13 and 16, a slide adjusting plate 90 is provided on the back surface side of the lid body 68. The slide adjusting plate 90 is a plate body formed into a substantially L shape when viewed from the side surface of the machine body, and is fixed to the lid body 68 by two fasteners 91 (bolts and nuts). The two fasteners 91 are also configured to be used as fasteners for fixing the grip operation tool 92 for sliding the lid body 68. In this embodiment, as shown in FIG. 16, the lid body 68 is formed in a flat plate shape extending linearly, and has a function of holding the position by friction along the arcuate opening / closing wall portion 31.

The bolt insertion hole 90a formed in the slide adjusting plate 90 is formed in a long elongated hole along the width direction (left-right direction). The slide adjusting plate 90 can change and adjust the relative position with the lid 68 along the width direction (left-right direction) within the range of the elongated hole of the bolt insertion hole 90a. By attaching the one end side of the lid 68 in the left-right direction to one end, sliding the slide adjustment plate 90 in the opposite direction and fastening and fixing it to the other end, there is no gap and there is a risk of falling off. Can be avoided. A leaf spring 93 that presses against a region of the lid 68 where the slide adjustment plate 90 is not located is provided, and the elastic urging force of the leaf spring 93 imparts resistance to the slide movement so that the position can be held in the open state. It has become.

Using the elastic urging force of the leaf spring 93, when the lid 68 is closed, the operator is positioned so as not to pinch his / her hand between the grip operating tool 92 and the lower edge of the opening 67. It is composed. That is, as shown in FIG. 13, an engaging hole 68A into which the leaf spring 93 can enter and engage is formed at a portion on the upper side of the front portion of the lid body 68. Then, as shown in FIG. 14, the lid body 68 is closed, and the leaf spring 93 enters and engages with the engagement hole 68A before the grip operating tool 92 and the lower edge portion of the opening 67 come into contact with each other. It is configured to stop at that position.

As a configuration for preventing the operator from pinching a hand between the gripping operation tool 92 and the lower edge portion of the opening 67, for example, instead of the configuration using the leaf spring 93, the opening 67 in the opening / closing wall portion 31 On the lower side, there is a configuration in which the lower end of the lid 68 is in contact with the contact portion to regulate the position, or the slide adjustment plate 90 is provided with the contact action portion and is in contact with the contact portion provided in the opening / closing wall portion 31. Various configurations such as a configuration for restricting the position can be adopted.

As shown in FIG. 1, a lower cover 94 covering the outer right side of the lower side of the grain tank 7 is provided on the lower side of the opening / closing wall portion 31. The lower cover 94 is formed so that the vertical width of the front end portion is slightly narrower than the vertical width of the rear end portion, the lower end edge is in a substantially horizontal posture, and the upper end edge is in a rearward rising inclined posture. .. The lower cover 94 is detachably supported. As shown in FIG. 3, the lower cover 94 is positioned so that the hook-shaped locking members 95 provided on both front and rear portions are locked to the locking pins 96 provided on both front and rear portions of the opening / closing wall portion 31. It can be held and can be locked by being locked to the locking portion 98 provided in the tank main body 32 by the elastic engagement type locking tool 97 having a well-known configuration provided on both the front and rear sides on the lower side. ing.

As shown in FIGS. 4 and 9, a circular insertion hole 88 is formed at an upper portion of the lateral edge portion of the front end portion of the opening / closing wall portion 31. Through the insertion hole 88, the operator can visually inspect whether or not the upper rod 69 is securely locked to the guide holding member 70 (locked state). The insertion hole 88 can be used when hanging by a lifting device when performing painting work in the manufacturing process.

[Another Embodiment]
(1) In the above embodiment, the other locking portion is composed of a rod that is slidable in the vertical direction with the rotation of the rotation shaft, but instead of this configuration, the rotation shaft is used. It may be composed of a rod that can slide in the left-right direction with the rotation of the rod, and is not limited to the rod. A locking portion that can rotate around the axis may be configured to be locked as it rotates.

(2) In the above embodiment, a plurality of locking members 63 (specific locking portions) are configured to be composed of hook-shaped members, but instead of this configuration, they slide in the vertical direction or the horizontal direction. Various configurations can be adopted, such as a configuration in which the opening / closing wall portion 31 is locked by rotating around the axis in a direction orthogonal to the plate surface of the opening / closing wall portion 31, and a configuration in which the opening / closing wall portion 31 is rotated and locked.

(3) In the above embodiment, a specific locking portion (locking member 63) is provided at the center side portion of the opening / closing wall portion 31, and another locking portion (rod 69) is provided at the outer peripheral side portion of the opening / closing wall portion 31. However, instead of this configuration, a specific locking portion is provided at the outer peripheral side portion of the opening / closing wall portion 31, and another locking portion is provided at the central side portion of the opening / closing wall portion 31. May be.

The present invention can be applied not only to a self-removing combine but also to a normal combine in which all the culms of the harvested culm are put into a threshing device.

7 Grain tank 31 Side plate 32 Tank body 35 Opening 40 Locked part (front and back frame)
63 Locking part (locking member )
69 locking portion (rod)
70 Locked part (guide holding member)