JP2020000075A - Combine harvester - Google Patents

Abstract

To provide a combine harvester facilitating maintenance work of a grain tank and a vertical carrying device while excellently covering the lateral side of the vertical carrying device in harvesting work.SOLUTION: A combine harvester includes: a grain tank 7 for storing grains; a vertical carrying device positioned at a rear side of the grain tank 7 and carrying upward grains stored in the grain tank 7; and a rear cover 97 provided in a state of continuing to the rear part of a side wall 31 of the grain tank 7, and covering the lateral side of the vertical carrying device. The rear cover 97 includes a lock mechanism 101 formed so as to be swingable to the side wall 31 around a vertical shaft core Y2 in a closed state of covering the lateral side of the vertical carrying device, and an open state of opening the lateral side of the vertical carrying device, and locking the rear cover 97 in a closed state.SELECTED DRAWING: Figure 9

Description

  The present invention includes a grain tank that stores grains, and a vertical transport device that is located at a rear side of the grain tank and transports the grains stored in the grain tank upward. About combine.

  Conventionally, a rear cover that covers the lateral side of the vertical conveyance device is provided in a state of being connected to the rear portion of the side wall of the grain tank, and the rear cover is provided in a fixed position (for example, see Patent Document 1). 1).

JP 2017-184768 A

  In the above conventional configuration, since the rear cover is provided in a fixed position, for example, when performing operations such as cleaning and inspection of the vertical transport device, or swinging the grain tank outward in the horizontal direction. In the case where the inside of the machine body is inspected, there is a disadvantage that such maintenance work becomes difficult to perform.

  Therefore, it has been desired to facilitate the maintenance work of the grain tank, the vertical transport device and the like while well covering the horizontal side of the vertical transport device during the harvesting operation.

  The feature configuration of the combine according to the present invention includes a grain tank that stores grains, and a vertical transport that transports the grains stored in the grain tank at the rear side of the grain tank and transports the grains upward. An apparatus and a rear cover that is provided in a state of being connected to a rear part of a side wall of the grain tank, and that covers a horizontal side of the vertical conveying device. A closed state that covers the lateral side of the orientation transport device, and an open state that opens the lateral side of the vertical transport device, is configured to be swingable around a vertical axis, and the rear cover is in the closed state. In that a lock mechanism that locks with a lock is provided.

  According to the present invention, at the time of harvesting, the rear cover is switched to the closed state and locked by the lock mechanism, so that the rear cover is connected to the rear portion of the side wall of the grain tank and covers the vertical conveying device. Is fixed in position. As a result, there is no possibility that the rear cover is accidentally opened due to vibration of the machine body or the like, and the harvesting operation can be performed satisfactorily. For example, when performing maintenance work such as cleaning and inspection of the vertical transport device, the lateral side of the vertical transport device is opened by switching the rear cover to the open state, and the work is performed satisfactorily. be able to. In addition, when performing maintenance work such as inspection of the inside of the machine by swinging and opening the grain tank laterally outward, first, swing the grain tank with the rear cover switched to the open state. Accordingly, when the grain tank is swung, the work can be favorably performed by preventing the rear cover from interfering with the vertical transport device or obstructing the swing of the grain tank.

  Therefore, it is possible to easily perform maintenance work on the grain tank, the vertical transport device, and the like while well covering the horizontal side of the vertical transport device during the harvesting operation.

  In the present invention, it is preferable that the lock mechanism automatically switches to the locked state based on the swing operation of the rear cover to the closed state.

  According to this configuration, when the rear cover is swung from the open state to the closed state, the rear cover is automatically switched to the locked state, so that there is no disadvantage that the operator forgets to lock the rear cover, and the rear cover is closed. The position can be reliably held in the state.

  In the present invention, the lock mechanism includes an elastic locking member provided on one of the rear cover and the side wall, and a locked portion provided on the other of the rear cover and the side wall. Being provided, the elastic cover member is elastically deformed and rides over the locked portion to be locked to the locked portion as the rear cover swings from the open state to the closed state. Preferably, the lock mechanism switches to the lock state.

  According to this configuration, when the rear cover swings from the open state to the closed state, the elastic locking member moves while elastically deforming so as to get over the locked part. When the elastic locking member gets over the locked portion, the elastic locking member is locked to the locked portion and is prevented from returning to the original direction, and is locked at that position. When a return force is applied to the elastic locking member to the extent that the elastic locking member is elastically deformed, the elastic locking member moves over the locked portion and moves in the original direction to release the lock.

  Therefore, the lock mechanism has a configuration in which the elastically deformable member and the locked portion having a simple configuration that allows the elastically deformable member to get over the lockable member can be accommodated with a simple configuration and low cost.

  In the present invention, a lateral cover portion connected to the rear end of the side wall and extending in the front-rear direction and a rear cover connected to the rear end of the lateral cover portion and extending in the left-right direction are provided on the rear cover. Preferably, a front end of the lateral cover is pivotally connected to the side wall so as to be swingable around the vertical axis.

  According to this configuration, the rear cover covers the lateral side of the vertical transport device with the horizontal cover portion, and the rear cover portion connected to the rear end of the horizontal cover portion has the rear cover portion behind the vertical transport device. It is possible to cover the side, and it is possible to satisfactorily cover the region facing the outside of the vertical transport device.

  Since the front end of the side cover is pivotally connected to the side wall of the grain tank, only the rear cover can be rotated without changing the attitude of the grain tank. The vertical transfer device can be opened largely outward by rotating the side cover unit integrally.

  In the present invention, it is preferable that a vertical position holding mechanism for holding the vertical position of the rear cover in the closed state is provided.

  According to this configuration, when the rear cover is switched to the closed state, the vertical position is held by the vertical position holding mechanism. Therefore, since the rear cover is locked by the lock mechanism in a state where the vertical position is held, in the closed state, the rear cover can be held in a proper posture without rattling.

  In the present invention, the vertical position holding mechanism has a long hole formed in one of the rear cover and the side wall and extending along the horizontal direction, and a long hole formed in the other of the rear cover and the side wall. And a pin for inserting the elongated hole is provided, and it is preferable that the pin be switched to a state where the pin is inserted into the elongated hole with a swing operation from the open state to the closed state of the rear cover. .

  According to this configuration, when the rear cover is swung from the open state to the closed state, a pin provided on one of the rear cover and the side wall is provided with the pin provided on the other. Switches to a state in which is inserted. Since the elongated holes extend in the horizontal direction, when the pins are inserted into the elongated holes while allowing the pins to be engaged with the swing operation, the vertical positions of the rear covers with respect to the side walls of the rear cover are maintained by their engagement.

  Therefore, even if the rear cover attempts to move up and down due to the vibration of the body or the like, the up and down movement is restricted and the rear cover can be held at an appropriate position.

It is a whole side view of a combine. It is an overall top view of a combine. It is a rear view of a grain tank. It is a perspective view of a grain tank. It is a perspective view of a grain tank in a maintenance state. It is a vertical front view of a grain tank. It is a cross-sectional plan view of a grain tank. It is a perspective view of the back cover of an open state. FIG. 4 is a cross-sectional plan view of a rear cover disposition portion in a closed state. It is a cross-sectional plan view of the rear cover disposition portion in an open state. It is a side view of a lower cover. It is sectional drawing which shows the attachment state of the type provided with a regulating member. It is a vertical front view of the lower part of a grain tank. It is a figure which shows the attitude | position switching state of a kernel tank and a rear cover.

  Hereinafter, a case in which an embodiment of the present invention is applied to a self-contained 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 includes a cutting unit 3 that cuts planted grain culms at a front portion of a traveling machine body 2 that is self-propelled by a pair of left and right crawler traveling devices 1. . A driving unit 5 whose periphery is covered by a cabin 4 is provided on the front right side of the traveling machine body 2. Behind the operating unit 5, a threshing device 6 for threshing the grain stalks cut by the cutting unit 3 and a grain tank 7 for storing grains obtained by threshing are arranged side by side. Deployed in state. The grain tank 7 is located on the right side of the fuselage, and the threshing device 6 is located on the left side of the fuselage. That is, the operating unit 5 is located in front of the grain tank 7. The engine E is provided below the driver's seat 8 in the driver 5. At the rear of the traveling machine body 2 and behind the grain tank 7, a grain discharging device 9 for discharging the grains stored in the grain tank 7 out of the machine is provided. At the rear of the threshing device 6, a waste straw processing device 20 for shredding waste straw is provided.

  In this embodiment, when defining the longitudinal direction of the fuselage, it is defined along the fuselage advancing direction in the working state, and when defining the lateral direction of the fuselage, the left and right are defined as viewed from the fuselage advancing direction. . That is, the direction indicated by the reference numeral (F) in FIGS. 1 and 2 is the front side of the aircraft, and the direction indicated by the reference numeral (B) in FIGS. 1 and 2 is the rear side of the aircraft. The direction indicated by reference numeral (L) in FIG. 2 is the left side of the aircraft, and the direction indicated by reference numeral (R) in FIG. 2 is the right side of the aircraft.

  The reaping unit 3 is provided with a weeding device 10 for weeding and guiding the root of the planted grain culm to be harvested, and a plurality of raising devices 11 for causing the weeded planted grain culm to be in a vertical position. A clipper-type cutting device 12 that cuts the root of the planted grain culm, and a vertical conveyance that feeds the harvested grain culm rearward while changing the posture from the vertical posture to a horizontal falling posture and supplies it to the threshing device 6. A device 13 and the like are provided. The upper side of the vertical transport device 13 is covered with a dust cover 14.

  Although not shown, the threshing device 6 performs the threshing process by handling the spike end side in a handling room while nipping and conveying the stock side of the supplied harvested grain culm by a threshing feed chain. The processed material after the threshing process is sorted into grains and straw chips in a lower sorting section. The grains are transported out of the threshing device 6 to the right and left side by a first-piece transport screw (not shown), and then transported by the grain-lifting conveyor 15 to the interior of the grain tank 7. The grain tank 7 stores the grains sent from the threshing device 6. Thereafter, the grains stored in the grain tank 7 are carried out to the outside by the grain discharging device 9.

  The bottom of the grain tank 7 is provided with a bottom screw 16 that rotates around the longitudinal axis and stores the grain that is stored toward the rear side of the machine body. The grain discharge device 9 receives a grain delivered from the bottom screw 16 and transports the grain upward. The grain feed device 9 includes a vertical feed screw conveyor 17 as a vertical transport device and a vertical feed screw conveyor 17. A horizontal feed screw conveyor 19 for transporting the grains in the horizontal direction from the base end portion connected to the upper end portion to the discharge port 18 at the front end portion is provided.

  Although the supporting structure is not described in detail, the whole grain tank 7 is swingably supported around a vertical axis X which is a rotation axis of the vertical feed screw conveyor 17. In other words, as shown in FIG. 14, swinging around the vertical axis X can be switched between a normal storage state housed inside the machine body and a maintenance state in which the machine body projects laterally outward and swings. Supported as possible. The posture of the grain tank 7 is held by a position holding mechanism (not shown) in the storage state.

  As shown in FIG. 2, a communication unit 21 is attached to the right rear portion of the ceiling surface of the grain tank 7. The communication unit 21 receives, for example, a signal from a GPS satellite, and performs communication with a management server separately provided with various types of work management information. For example, as shown in FIG. 12, a restricting member 22 for preventing the communication unit 21 from passing near the driving unit 5 when the transverse screw conveyor 19 is rotated is operated as shown in FIG. When provided, the mounting plate 23 including the communication unit 21 and the regulating member 22 is mounted at the same position, and the mounting structure is also used.

  After the grain is conveyed to the vicinity of the upper end by the screw conveyor 28, the grain is conveyed to the tank 25 through the opening 25 formed in the grain tank 7 by the delivery blades 24 provided at the upper end. Release to the inward side.

[Grain tank]
Next, the grain tank 7 will be described.
As shown in FIGS. 5, 6, 7, the kernel tank 7 has a front and rear, left and right side surfaces, and is surrounded by a periphery to form a kernel storage space Q. A part of the right side wall part 30 (opening / closing wall part 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 able to be switched to an open state in which an operator opens the storage space Q by opening the storage space Q to the outside.

  The other side surface 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 connected in a series so as to be continuous. 32. As shown in FIG. 7, the left side wall portion 33 of the tank main body portion 32 is formed with a concave portion 34 for disposing the frying conveyor 15 in a state of being inserted therein.

  The right side wall 30 of the grain tank 7 is located so as to face outward on the right side of the traveling machine body 2. The right side wall portion 30 can open an area ranging from an upper portion to a lower portion and from a front portion to a rear portion. That is, as shown in FIGS. 5 and 7, an opening 35 is formed in the right side wall portion 30 so as to be largely open so as to open a region ranging from an upper portion to a lower portion and from a front portion to a rear portion. I have. The opening 35 thus largely opened is closed by the openable and closable wall portion 31 (an example of a side plate) to form a storage space Q therein.

  As shown in FIG. 5, the right side wall portion 30 includes an opening / closing wall portion 31 and a frame-shaped portion 36 surrounding the periphery of the opening 35. The frame-shaped portion 36 is connected to another side surface, It constitutes a part of the main body 32. As shown in FIG. 8, the opening / closing wall 31 is switched to the storage state, and the opening / closing wall 31 and the frame-shaped portion 36 are integrally connected as described later, thereby forming the right wall 30. .

  As shown in FIG. 5, the opening / closing wall portion 31 is supported by the tank main body portion 32 so as to be swingably openable and closable around a vertical axis Y <b> 1 located behind the grain tank 7. At the right end of the rear side wall portion 38 of the tank body 32, two turning support portions 39 are provided at an interval in the vertical direction, and the opening / closing wall portion 31 is moved by the turning support portion 39 to the vertical axis Y1. It is configured to be swingable around.

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

  As shown in FIGS. 5 and 7, a front-rear frame 40 extending in the vehicle front-rear direction over the front and rear portions of the tank body 32 is provided. The front-rearward frame 40 is formed in a cylindrical shape, and is provided so as to extend over the front wall portion 41 and the rear wall portion 38 of the tank body 32. The front-rearward frame 40 is provided in a state in which the frame is located at the upper and lower middle portion of the right end of the machine body inside the grain tank 7.

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

  As shown in FIG. 5, when the opening / closing wall portion 31 is in an open state, an opening holder 46 for holding the open state is provided. The opening holder 46 is a rod-shaped member having both ends bent, and one end (support end) is held by the support plate 47 and the other end (free end) is a frame of the tank body 32. It is inserted into the hole of the connecting member 48 attached to the portion 36 (see the phantom line in FIG. 5). Thus, the opening holder 46 holds the opening / closing wall 31 in an open state. When the opening holder 46 is not used, as shown by a solid line in FIG. 5, it is held down by a clip member (not shown) in a hanging posture.

  Further, an opening prevention wire 50 for preventing the opening / closing wall portion 31 from opening beyond a predetermined angle (for example, 90 degrees) is provided. The opening prevention wire 50 is a flexible metal wire, one end of which is connected to the connector 48 of the tank body 32 and the other end of which is connected to a pin 53 provided on the opening / closing wall 31. ing. In addition, in a state where it is held by the opening holder 46 or in a state where the opening / closing wall 31 is closed, the state is loosened.

  When the opening / closing wall 31 is held in the open state by the opening holder 46 or the opening prevention wire 50, an excessive force is applied to the opening / closing wall 31 in a direction to further open the opening / closing wall 31 by, for example, wind. When this occurs, the frame-shaped portion 36 of the tank body 32 to which the opening degree 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 FIG. 6, the second auxiliary frame body 54 is formed of a band plate, and the bracket 44 on the left wall portion 33 side to which the first auxiliary frame body 45 on the rear side is connected, and the frame-shaped portion 36 side. And a connecting tool 48. The second auxiliary frame 54 prevents deformation of the tank body 32 due to excessive force when an excessive force is applied to the opening / closing wall 31 in a direction in which the opening / closing wall 31 is further opened.

  Next, a configuration for reinforcing the strength of the opening / closing wall 31 will be described.

  As shown in FIG. 6, the opening / closing wall portion 31 is formed in a gentle arc shape when viewed in the front-back direction. An upper reinforcing portion 56 is provided at an upper portion of the opening / closing wall portion 31 on the inner side of the tank. The upper side reinforcing portion 56 is formed by bending a plate material into a substantially U-shaped cross section, and an upper support body 57 extending in the front-rear direction is integrally connected to the wall surface of the opening / closing wall portion 31 over the entire region in the front-rear direction. 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. As shown in FIG. 13, the lower reinforcing portion 59 is configured by connecting a first reinforcing member 59 a formed by bending a plate material into a substantially U-shape and a second reinforcing member 59 b in a substantially cylindrical shape. Have been. The lower reinforcing portion 59 is integrally connected to the wall surface of the opening / closing wall portion 31 over the entire region in the front-rear direction.

  At the rear end of the opening / closing wall 31, there is provided a vertical reinforcing portion 58 in the form of a rectangular tube for supporting the entire opening / closing wall 31 via the rotation support portions 39 on both the upper and lower sides.

  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 at intervals in the front-rear direction over the upper reinforcing portion 56 and the lower reinforcing portion 59. . Specifically, as shown in FIGS. 5 and 7, as the vertical support plate, the first vertical support plate 60 located at the front end of the opening / closing wall 31 is set to be higher than the front end. A second vertical support plate 61 located at a position shifted toward the rear side by the width and a third vertical support plate 62 located at the front and rear intermediate portion are provided. Each of the plurality of vertical support plates 60, 61, and 62 is a plate body having an L-shaped cross section, and is integrally connected to a 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 reinforcing portion 59 is provided from the second vertical support plate 61 to the rear end.

Next, a connection structure for connecting the opening / closing wall 31 to the tank body 32 will be described.
The opening / closing wall 31 is provided with a locking member 63 that locks with the front-rear frame 40. The swinging operation of the operation lever 64 allows the locking member 63 to be switched between a locking state in which the locking member 63 is hooked and locked to the front-rear frame 40 and a release state in which the locking is released. The locking member 63 is formed of a hook-shaped member having a substantially U-shaped locking groove 65.

  As shown in FIGS. 5 and 7, a rotation shaft 66 that is integrally rotated by a swing operation of the operation lever 64 is provided, and the locking member 63 is integrally and rotatably connected to the rotation shaft 66. . The rotation of the rotation shaft 66 accompanying the swing operation of the operation lever 64 causes the locking member 63 to switch between the locked state and the released state.

  The rotating shaft 66 is provided at a position close to the inside of the tank with respect to the opening / closing wall portion 31 so as to extend in the front-rear direction across the front / rear intermediate portion and the front portion of the opening / closing wall portion 31. The rotation shaft 66 is inserted through 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 It is rotatably supported by three vertical support plates 62.

  An operation lever 64 is provided at a front end portion of the rotation shaft 66 and 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 31 at a position corresponding to the operation lever 64 between the first vertical support plate 60 and the second vertical support plate 61. The opening 67 can be switched between a state in which it is covered by a lid 68 (see FIG. 7) that can slide in the vertical direction and a state in which it is opened. When the lid 68 is slid upward, the operation lever 64 faces outward through the opening 67, and the operator can manually operate from outside the machine.

  When the operation lever 64 is switched to the vertical position located inside the opening / closing wall 31, the locking member 63 is locked to the front-rear frame 40, and the swinging-side end of the opening / closing wall 31 in the stored state. The tank body 32 is connected. Although not shown, when the operating lever 64 is manually pulled outward through the opening 67 to switch the operating lever 64 to the inclined position 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 31 and the tank body 32 is released.

The grain tank 7 has a structure for holding the position of the opening / closing wall 31 in the storage state and for pulling the opening / closing wall 31 toward the tank main body 32 side to eliminate a gap and increase the obstructiveness of the storage space. Have been.
Hereinafter, the configuration will be described.

  As shown in FIGS. 6 and 7, the opening / closing wall portion 31 is supported so as to be movable only in the vertical direction, and is linked to the rotating shaft 66 so as to be movable in the vertical direction as the rotating shaft 66 rotates. A plurality of rods 69 are provided, and a guide holding member 70 as a plurality of locked members is provided on the tank body 32.

  As shown in FIG. 13, at a position corresponding to the inner peripheral side of the opening 35 of the tank main body 32 in the guide holding member 70, an inclined portion 71 that is inclined outwardly toward the inner peripheral side is formed. ing. At a position corresponding to the outer peripheral side of the opening 35 in the guide holding member 70, a receiving holding portion 72 extending in the up and down direction while being continuously connected to the inclined portion 71 is formed.

  When the operation lever 64 is switched from the inclined posture to the vertical posture so that the locking member 63 is in the locked state, the rod 69 is slidably guided by the guide holding member 70 with the operation, and The opening / closing wall portion 31 is configured to be drawn toward the tank main body portion 32 side.

  In addition, when viewed from the side, a total of four rods 69 are located at positions corresponding to both front and rear ends of the rotating shaft 66 and at each of the upper side portion and the lower side portion of the opening / closing wall portion 31. It is provided so as to be movable only in the vertical direction. The two upper rods (upper rods) 69 located on the upper side are provided so as to pass through the insertion holes formed in the upper support member 73 and the upper reinforcing portion 56, respectively, and are movable only in the vertical direction. It is supported by. The two lower rods (lower rods) 69 located on the lower side are moved only in the vertical direction by the lower support member 74 which is formed in a substantially U-shape in the front-rear direction and has an insertion hole through which the rod 69 is inserted. Supported as possible.

  As shown in FIGS. 5 and 6, an operating body 77 as a balance arm that rotates integrally is connected to both front and rear ends of the rotating shaft 66. The operating body 77 has an upper rod 69 pivotally connected to one end in the longitudinal direction via a link member 78. The lower rod 69 on the lower side is pivotally connected to the other end of the operating body 77 in the longitudinal direction via a link member 78. The rotation shaft 66 rotates with the operation of the operation lever 64, and the rod 69 slides in the vertical direction via the operation body 77 and the link member 78.

  When the operation lever 64 is switched to the vertical position, the upper rod 69 moves upward and the lower rod 69 moves downward via the operation body 77 and the link member 78. The upper rod 69 is slidably guided by an upper guide holding member 70 provided in the tank body 32, and the lower rod 69 is slidably guided by a lower guide holding member 70 provided in the tank body 32. You will be guided. By the sliding guide between the rod 69 and the guide holding member 70, the opening / closing wall 31 and the tank main body 32 are relatively displaced, and the opening / closing wall 31 is drawn toward the tank main body 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 come into close contact with each other, so that the grain can be stored.

  A seal member 81 is provided at a contact point between the opening / closing wall portion 31 and the peripheral portion of the opening 35 in the frame-shaped portion 36. In particular, a sealing member formed of a rubber weather strip having a large elastic deformation amount and capable of improving the sealing property is provided on the lower edge portion and the outer edge portion of the swing outer peripheral portion of the peripheral portion of the opening 35. 81 (see FIG. 13).

  In the above-described configuration, when the operation lever 64 is switched to the inclined posture in which the operation lever 64 is inclined outward, the locking member 63 is released, and accordingly, the upper rod 69 moves downward to hold the guide. The engagement with the member 70 is released, and the lower rod 69 moves upward to release the engagement with the guide holding member 70. As a result, it is possible to swing the opening / closing wall portion 31 outward and switch to the maintenance state.

  As shown in FIG. 7, the storage space Q and the lever storage area sandwiched between the first vertical support plate 60 and the second vertical support plate 61 of the opening / closing wall 31 are partitioned. Even if grains are stored in the storage space Q, there is no grain in the lever storage area where the operation lever 64 is provided, and the operation can be performed easily.

  A detection sensor S for detecting whether or not the opening / closing wall 31 has been switched to the closed state is provided at an upper portion of the frame-shaped portion 36 of the tank body 32 on the front side of the fuselage. The detection sensor S is configured to detect a closed state when a detection target 87 provided on the opening / closing wall 31 makes a contact action. 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. I have.

[Lower cover]
As shown in FIG. 1, a lower cover 93 is provided below the opening / closing wall 31 to cover a right outer side of a lower side of the grain tank 7. The lower cover 93 is formed such that the vertical width of the front end is slightly smaller than the vertical width of the rear end, the lower edge is substantially horizontal, and the upper edge is rearwardly inclined. . The lower cover 93 can be removed prior to the opening operation of the opening / closing wall portion 31 and can be attached when the closing operation of the opening / closing wall portion 31 is completed. That is, as shown in FIG. 4, the lower cover 93 is configured such that hook-shaped locking members 94 provided on both front and rear sides lock the locking pins 95 provided on both front and rear sides of the opening and closing wall 31. And a well-known elastic engagement type lock member 96 provided on the front and rear sides on the lower side, and is locked on a locking portion (not shown) provided on the tank body 32. And lockable.

  As shown in FIG. 11, the vertical positions of the front and rear locking members 94 are provided at substantially the same height, and the vertical positions of the front and rear locking members 96 are also provided at substantially the same height. With this configuration, it is possible to easily perform the attaching / detaching operation even if the lower cover 93 is formed so that the upper end edge is inclined rearward.

[Rear cover]
As shown in FIGS. 2, 3, and 4, a rear cover 97 that covers the lateral side of the vertical feed screw conveyer 17 is provided so as to be continuous with the rear part of the opening / closing wall 31 as a side wall of the grain tank 7. The rear cover 97 is supported swingably around the vertical axis Y2 in a closed state covering the lateral side of the vertical feed screw conveyor 17 and an open state opening the lateral side of the vertical feed screw conveyor 17. ing.

  The rear cover 97 is provided with a lateral cover 97a extending in the front-rear direction and connected to the rear end of the opening / closing wall 31 and a rear cover 97b extending in the left-right direction and connected to the rear end of the lateral cover 97a. The front end of the horizontal cover portion 97a is pivotally connected to the opening / closing wall portion 31 so as to be swingable around the vertical axis Y2.

  On the rear side of the vertical feed screw conveyer 17, a fixed cover 98 is provided in a horizontal position that is continuous with the rear cover portion 97b of the rear cover 97. The fixed cover 98 is fixed by screws to a vertically oriented frame 99 fixedly provided from the body frame.

  As shown in FIGS. 2, 8, and 9, the front end of the lateral cover 97 a of the rear cover 97 is attached to the rear side of the vertical reinforcing portion 58 of the opening / closing wall 31 around the vertical axis Y <b> 2 via the hinge 100. It is supported so that it can swing. As shown in FIG. 9, a lock mechanism 101 for locking the rear cover 97 in a closed state is provided. The lock mechanism 101 is configured to automatically switch to the locked state based on the swing operation of the rear cover 97 to the closed state.

  The lock mechanism 101 includes an elastic locking member 102 provided on the rear cover 97 and a locked portion 103 provided on the opening / closing wall 31. The rear cover 97 swings from the open state to the closed state. Accordingly, the locking mechanism 101 is configured to be switched to the locked state by the elastic locking member 102 getting over the locked portion 103 and being locked to the locked portion 103 while being elastically deformed.

  In addition, as shown in FIGS. 8, 9, and 10, the rear cover 97 is provided with the receiving wall portion 104 extending from the front end of the lateral cover portion 97a in a direction substantially orthogonal to the plan view. Have been. The receiving wall portion 104 is configured to contact and hold the rear side surface of the vertically reinforcing portion 58 of the opening / closing wall portion 31 when the rear cover 97 is closed.

  The vertical reinforcing portions 58 are provided with a pair of vertical members 105 and 106 having a substantially L-shaped plate shape in plan view provided at an interval in the front and rear, and a schematic plan view connecting the pair of vertical members 105 and 106. The Z-shaped connecting member 107 is integrally connected to form a rectangular tube. The rear-side vertical member 106 is wider than the front-side vertical member 105, and the rear-side vertical member 106 and the connecting member 107 project toward the inside of the machine (left side). ing. The locked portion 103 is constituted by a portion where the vertical member 105 on the rear side and the connecting member 107 protrude toward the inside of the machine.

  The receiving wall portion 104 of the rear cover 97 is provided wider than the locked portion 103 so as to protrude further toward the inside of the machine. In a region protruding toward the inside of the machine, two leaf-spring elastic locking members 102 are attached by fasteners 108 (bolts and nuts) at two vertically separated positions. The elastic locking member 102 is formed by bending a part of a leaf spring in an arc shape in a plan view, and as the rear cover 97 swings from the open state to the closed state, the circular shape of the elastic locking member 102 is increased. The arc-shaped portion is configured to get over the edge of the locked portion 103 while being elastically deformed. When the end of the locked portion 103 is crossed, the elastic locking member 102 is locked to the locked portion 103 and can be locked in a closed state.

A vertical position holding mechanism 110 that holds the vertical position of the rear cover 97 in the closed state is provided.
As shown in FIG. 8.9.10, rearwardly protruding pins 111 are fixedly attached to two vertically spaced portions of the rear vertical member 106. In the receiving wall portion 104 of the rear cover 97, a slot 112 that is long in the lateral direction and narrow in the vertical direction is substantially equal to the outer diameter of the pin 111 is formed at a position corresponding to the pin 111. ing. Then, with the swing operation of the rear cover 97 from the open state to the closed state, the pin 111 is configured to be switched to a state of being inserted into the elongated hole 112.

  The rear cover 97b of the rear cover 97 is also provided with a structure for holding the vertical position by engaging the pin 113 with the elongated hole 114. Two pins 113 are fixedly attached to the swinging end side portion of the rear cover portion 97b so as to protrude toward the front side. In the relay cover 115 supported by the fixed cover 98, a long hole that is long in the horizontal direction and narrow in width in the vertical direction is substantially equal to the outer diameter of the pin 113. 114 are formed. With the swinging operation of the rear cover 97 from the open state to the closed state, the pin 113 is switched to a state of being inserted into the elongated hole 114.

  As shown in FIG. 9, the relay cover portion 115 has an insertion hole (not shown) formed of a long hole in the lateral direction through which the shaft member 116 provided integrally with the fixed cover 98 is inserted. It is supported by the fixed cover 98 in a state where it is urged by a spring 118 which is externally inserted into 116. That is, the relay cover portion 115 is configured to allow the fixed cover 98 to swing forward with respect to the external force by the external force, and to be elastically returned and held in a predetermined posture by the spring 118 when the external force is removed. ing. In addition, the position can be changed and adjusted in the lateral direction by an amount corresponding to the insertion hole. With this configuration, the pin 113 and the elongated hole 114 are moved in the lateral direction within the range of the insertion hole 117 in a state where the pin 113 and the elongated hole 114 are engaged with the swing operation of the rear cover 97 from the open state to the closed state. The position of the pin 113 can be adjusted so that the pin 113 does not easily come off the elongated hole 114.

  In the above configuration, when the grain tank 7 is switched from the storage state to the maintenance state after the harvesting operation is completed, the rear cover 97 is previously switched to the open state as shown in FIG. By switching the kernel tank 7 from the storage state to the maintenance state, it is possible to avoid the rear cover 97 from colliding with the vertical feed screw conveyor 17, and to perform a good posture switching process.

[Another embodiment]
(1) In the above embodiment, the vertical position holding mechanism 110 is configured to hold the position by the engagement of the pin 111 and the elongated hole 112. However, instead of this configuration, the position may be held by fastening bolts. Alternatively, it may be configured by a locking piece that engages in the vertical direction. Further, a configuration without such a vertical position holding mechanism 110 may be employed.

(2) In the above embodiment, the fixed cover 98 is provided in addition to the rear cover 97. However, instead of this configuration, the rear cover 97b in the above embodiment is formed to be long, and the whole can be opened and closed. It is good also as a structure.

(3) In the above embodiment, the lock mechanism 101 is configured to automatically switch to the locked state based on the swing operation of the rear cover 97 to the closed state. However, instead of this configuration, the rear cover 97 is After the closed state, the operation may be switched to the locked state by another operation.

(4) In the embodiment described above, the right side wall 30 of the grain tank 7 is provided with the openable and closable wall 31. However, instead of such a configuration, the grain tank 7 can be opened and closed. Without providing, the grain may be stored in a storage space closed by a box-shaped wall.

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

7 Grain tank 17 Vertical conveying device 31 Side wall 97 Rear cover 97a Horizontal cover 97b Rear cover 101 Lock mechanism 102 Elastic locking member 103 Locked part 110 Vertical position holding mechanism 111 Pin 112 Slot

Claims (6)

A grain tank for storing grains,
A vertical transport device that is located on the rear side of the grain tank and transports the grains stored in the grain tank upward,
A rear cover is provided so as to be continuous with a rear portion of a side wall of the grain tank, and covers a horizontal side of the vertical transport device,
The rear cover swings around the vertical axis with respect to the side wall in a closed state covering the lateral side of the vertical conveying device and an open state opening the lateral side of the vertical conveying device. Movably configured,
A combine provided with a lock mechanism for locking the rear cover in the closed state.   The combine according to claim 1, wherein the lock mechanism automatically switches to a locked state based on a swing operation of the rear cover to the closed state. The lock mechanism includes an elastic locking member provided on one of the rear cover and the side wall, and a locked part provided on the other of the rear cover and the side wall,
As the rear cover swings from the open state to the closed state, the elastic locking member elastically deforms and rides over the locked part and locks on the locked part. The combine according to claim 2, wherein the lock mechanism switches to the locked state. The rear cover includes a lateral cover portion that extends to the rear end of the side wall and extends in the front-rear direction, and a rear cover portion that extends to the rear end of the lateral cover portion and extends in the left-right direction. ,
The combine according to any one of claims 1 to 3, wherein a front end of the lateral cover portion is pivotally connected to the side wall so as to swing around the vertical axis.   The combine according to any one of claims 1 to 4, further comprising a vertical position holding mechanism that holds a vertical position of the rear cover in the closed state. An elongate hole formed in one of the rear cover and the side wall and extending along the horizontal direction, and the elongate hole located in the other of the rear cover and the side wall; And a pin for inserting the
The combine according to claim 5, wherein the pin is switched to a state in which the pin is inserted into the elongated hole in accordance with the swing operation of the rear cover from the open state to the closed state.

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