JP2021023130A - Combine-harvester - Google Patents

Abstract

To address the desire of facilitating maintenance of the inside of a thresher without complicating the configuration.SOLUTION: A combine-harvester comprises a thresher, and a grain tank located on the upper side of the thresher and storing grains after the threshing, where a threshing chamber includes a threshing cylinder 31 rotating around a longitudinal axis, and an arc-shaped receiving net provided along the outer periphery of the threshing cylinder 31. The threshing cylinder 31 includes a raking part 33 located in front of the threshing cylinder to rake reaped grain culms, and a threshing part 34 located on the rear side of the raking part 33 and threshing the reaped grain culms. A part of a top plate 30, from a portion corresponding to the upper side of the raking part 33 to a portion corresponding to the upper side of the threshing part 34 is configured to be removable rearward a machine body with respect to the thresher body.SELECTED DRAWING: Figure 9

Description

The present invention relates to a combine in which a grain tank is provided above the threshing device.

In the conventional combine, for example, as shown in Patent Document 1, in order to inspect and clean the threshing device, the top plate covering the upper part of the handling chamber is directed upward around the front-rear axis on one end side in the lateral direction. Some were provided so that they could be swung open. Then, in what is shown in Patent Document 1, the grain tank located above the threshing device swings upward around the front-rear axial core on one end side in the lateral direction in order to greatly open the upper part of the threshing device. It is provided so that it can be opened.

Japanese Unexamined Patent Publication No. 2013-183717

In the configuration in which the top plate is swung upward to open the handling room outward as in the above-mentioned conventional configuration, the top plate is greatly shaken upward when performing maintenance work such as inspection and cleaning of the threshing device. A large space is required on the upper side to move it. Therefore, a mechanism for opening the grain tank widely is required, which has a disadvantage that the support structure of the grain tank becomes complicated. Further, in order to swing the top plate, the worker must climb to a high place, which has a disadvantage that the work becomes difficult to perform.

Therefore, it has been desired to facilitate maintenance work inside the threshing apparatus without inviting complication of the structure.

The characteristic composition of the combine according to the present invention is a threshing device for threshing the harvested grain in the handling chamber and a grain located above the threshing device to store the grains after the threshing process by the threshing device. A grain tank is provided, and the handling chamber is provided with a handling cylinder that rotates around the front-rear axis and an arc-shaped receiving net provided along the outer peripheral portion of the handling cylinder. The handling chamber is provided with a scraping section located at the front of the handling cylinder to scrape the harvested grain shavings and a handling processing section located behind the scraping section to handle and process the harvested grain shavings. The portion of the top plate covering the upper part of the top plate, which extends from the portion corresponding to the upper part of the scraping portion to the portion corresponding to the upper part of the handling processing portion, is configured to be removable from the threshing device main body to the rear side of the machine body. There is a point.

According to the present invention, when performing maintenance work such as inspection and cleaning of the inside of the handling chamber, the top plate covering the upper part of the handling chamber can be attached and detached along the direction of the rotation axis of the handling cylinder. With this configuration, the worker can work from a low position on the side of the machine without climbing to a high position as in the case of swinging the top plate upward. Further, for example, even if the grain tank is arranged above the threshing device, the grain tank does not need to be provided with a special evacuation structure in order to open the top plate, and the support structure is simple. Can be done.

By the way, in the scraping portion of the handling cylinder, for example, a spiral blade or the like is provided on the outer peripheral portion of the handling cylinder, and a process of scraping the harvested culm carried in from the threshing inlet to the rear side is performed. Since the cut grain culms are transported as they are in this scraping portion, there is a risk that the grain culms may be caught on the spiral blades and stay there and accumulate in a lump, or the inner surface of the top plate may be worn. is there.

On the other hand, in the handling section of the handling cylinder, a handling tooth for handling processing is provided on the outer peripheral portion of the handling cylinder, and a handling process (threshing process) of the cut grain culm is performed between the handling tooth and the receiving net. In this handling section, the space between the handling tooth and the top plate is narrowed, and the top plate may be worn due to contact with the threshing processing section.

Therefore, the portion of the top plate that extends from the portion corresponding to the upper part of the scraping portion to the portion corresponding to the upper part of the handling processing portion is configured to be removable. As a result, the outer peripheral side of the handling cylinder is opened in each of the scraping portion and the handling processing portion, so that maintenance work such as cleaning and inspection / repair can be performed satisfactorily.

Therefore, it has become possible to easily perform maintenance work inside the handling chamber without inviting complication of the structure.

In the present invention, the front end portion of the top plate is provided with a front wall portion fixed to the threshing device main body portion, and a collar portion is provided in a state of extending from the front wall portion toward the rear of the machine body. It is preferable that the front end portion of the movable top plate portion of the top plate provided on the inner surface portion of the collar portion so as to be removable is fitted and mounted in close contact with each other.

According to this configuration, the movable top plate portion can be removed rearward while leaving the front wall portion of the top plate on the threshing device main body portion. The front end portion of the movable top plate portion is fitted intimately to the inner surface portion of the collar portion with respect to the flange portion provided on the front wall portion. As a result, when the movable top plate portion is pulled out rearward and then reattached, the front wall portion and the movable top plate portion are in close contact with each other, and dust in the handling chamber leaks to the outside. You can avoid that.

In the present invention, the front end portion of the top plate is provided with a front wall portion fixed to the threshing device main body portion, and a collar portion is provided in a state of extending from the front wall portion toward the rear of the machine body. It is preferable that the front end portion of the movable top plate portion of the top plate provided on the outer surface portion of the collar portion is fitted and mounted in close contact.

According to this configuration, the movable top plate portion can be removed rearward while leaving the front wall portion of the top plate on the threshing device main body portion. The front end portion of the movable top plate portion is fitted and mounted in close contact with the outer surface portion of the collar portion with respect to the collar portion provided on the front wall portion. As a result, when the movable top plate portion is pulled out rearward and then reattached, the front wall portion and the movable top plate portion are in close contact with each other, and dust in the handling chamber leaks to the outside. You can avoid that.

In the present invention, it is preferable that a sealing material is interposed between the collar portion and the front end portion of the movable top plate portion.

According to this configuration, it is possible to maintain a good close contact between the front wall portion and the movable top plate portion by the sealing material, and it is possible to surely prevent dust in the handling chamber from leaking to the outside.

In the present invention, it is preferable that a guide member for guiding the thrown grain culm is provided below the scraping portion, and the guide member is configured to be removable toward the front side of the machine body. is there.

The front side of the machine body of the scraping part is in a state of being greatly opened to receive the harvested culm into the handling room. Therefore, in this configuration, the guide member provided below the scraping portion is removed toward the front side of the machine body. As a result, for example, the work becomes easier than in a configuration in which the guide member is removed toward the lateral side and the outer side of the machine body.

It is an overall side view of a combine. It is the whole plan view of the combine. It is a longitudinal side view of the threshing device. It is a side view which shows the frame structure. It is a side view of the left side wall part with the lid removed. It is a side view of the right side wall part. It is a perspective view which shows the frame structure. It is a longitudinal front view of a threshing device. It is a top view which shows the sliding state of the top plate. It is a vertical sectional side view of the front wall part of the top plate. It is a front view of the threshing entrance plate arrangement part. It is sectional drawing which shows the connected state of the threshing entrance plate. It is a top view of the top plate of another embodiment. It is a vertical sectional front view of the top plate of another embodiment. It is sectional drawing of the bolt connection part before connection. It is sectional drawing of the bolt connection part after connection.

Embodiments of the present invention will be described with reference to the drawings. In the following description, the direction of the arrow "F" is the "front side of the aircraft" (see FIGS. 1 and 2), the direction of the arrow "B" is the "rear side of the aircraft" (see FIGS. 1 and 2), and the arrow " The direction of "L" is "left side of the aircraft" (see FIG. 2), and the direction of the arrow "R" is "right side of the aircraft" (see FIG. 2).

[Overall composition of combine harvester]
FIGS. 1 and 2 show a normal combine as an example of a combine. This combine is a threshing device 4 that performs a threshing process on a harvesting transport unit 1, a driving unit 3 covered with a cabin 2, and a threshing transport unit 1 that cuts and transports the planted grain stalks to the rear. , A grain tank 5 for storing grains obtained by threshing by the threshing device 4, a driving unit 7 having an engine 6 as a power source, and a pair of left and right front wheels that cannot be steered and are rotationally driven. 8. It is equipped with a pair of left and right rear wheels 9 that can be steered.

As shown in FIG. 2, the grain tank 5 is wider than the threshing device 4 in a plan view, and the grain tank 5 is laterally outward from the lateral end of the threshing device 4 on both left and right sides. Overhanging towards. Further, as shown in FIGS. 1 and 4, the bottom surface of the grain tank 5 is formed in a downwardly constricted shape in a side view, and the grains stored in the lowest portion inside the tank are moved outward on the left side. A bottom screw 5A for carrying is provided. On the left side of the grain tank 5, a screw conveyor type grain discharging device 10 for transporting grains transported by the bottom screw 5A to the outside of the machine body is provided.

The cutting transport unit 1 is provided in the front part of the machine body, and has a cutting unit 11 that cuts the planted culms to be planted and gathers the cut culms toward the center in the cutting width direction, and a cutting unit 11 that is cut and gathered in the center. It is provided with a feeder 12 as a transport unit for transporting the grain culm toward the threshing device 4 at the rear of the machine body. The rear end of the feeder 12 is supported by the airframe so as to swing up and down around the horizontal axis. The entire cutting transport unit 1 including the feeder 12 and the cutting unit 11 is configured to be able to swing up and down by a hydraulic cylinder for raising and lowering cutting (not shown).

As shown in FIG. 3, in the feeder 12, a plurality of endless rotating chains 15 are wound and stretched in a tubular transport case 13 over a front wheel body (not shown) and a rear wheel body 14. A lateral locking carrier 16 is erected over the endless rotating chain 15, and is configured to transport the crops delivered from the cutting section 11 in the rear-upward direction.

The threshing device 4 is located at a low position in the central part in the left-right direction of the machine, and above the threshing device 4, a grain tank 5 for storing grains after being threshed by the threshing device 4 and an engine as a power source. 6 and are provided. The grain tank 5 and the engine 6 are arranged in the front-rear direction with the grain tank 5 located on the front side of the machine body and the engine 6 located on the rear side of the machine body. The outer sides of the left and right sides of the threshing device 4 are covered with an exterior cover 17.

As shown in FIGS. 1, 4 to 8, a pair of left and right main frames 20 extending in the front-rear direction of the machine body are provided in the lower part of the machine body. The left and right main frames 20 support the entire body, and the main frame 20 corresponds to the body frame.

The left and right main frames 20 are formed in a substantially lateral U-shape in cross section, and are provided in a state of extending long in the front-rear direction from the front portion of the machine body to the rear part of the machine body. The axles of the left and right front wheels 8 and the left and right rear wheels 9 are provided at positions lower than the left and right main frames 20. The left and right main frames 20 are supported by the left and right front wheels 8 and the left and right rear wheels 9.

[Threshing device]
Next, the threshing device 4 will be described.
As shown in FIGS. 3 and 4, the threshing apparatus 4 is provided with a threshing unit 21 that performs a threshing process and a sorting unit 22 that sorts the processed material after the threshing process by the threshing unit 21. There is. Inside the threshing section 21, a handling chamber 23 for handling the harvested culm is formed. The sorting unit 22 is provided with a sorting processing unit 24 for sorting the processed product after the threshing treatment into second products such as grains and grains with branches, and straw waste and the like. .. On the rear side of the machine body of the threshing device 4, a shredding processing device 25 for shredding the waste straw after the threshing process by the threshing device 4 is provided.

As shown in FIGS. 4 to 8, the threshing portion 21 is placed and supported on the left and right main frames 20. The threshing portion 21 includes left and right plate-shaped left and right side wall portions 26, 27 extending in the vertical direction, substantially plate-shaped rear wall portions 28 connecting the rear ends of the left and right side wall portions 26, 27, and left and right. The periphery is surrounded by a substantially plate-shaped front wall portion 29 that connects the front ends of the side wall portions 26 and 27, and a top plate 30 that extends over the left and right side wall portions 26 and 27 and covers the upper portion. ing. The front wall portion 29 and the rear wall portion 28 are formed with openings for the threshed product to pass through.

The threshing section 21 is configured such that the front side of the machine body is narrow in the vertical direction and the rear side of the machine body is wide in the vertical direction. The threshing portion 21 is placed on a main frame 20 whose lower end portion extends in a substantially horizontal posture along the front-rear direction. Therefore, the upper end portion of the threshing portion 21 is in a rearward tilting posture in which the position becomes higher toward the rear side.

As shown in FIGS. 3 and 8, the handling chamber 23 is formed in a state of being surrounded by the side wall portions 26 and 27 on both the left and right sides and the top plate 30 on the upper side. The handling chamber 23 has a handling cylinder 31 that rotates around the axis X along the front-rear direction of the machine body, and a substantially arc shape that is located below the handling cylinder 31 and is located along the outer peripheral portion of the handling cylinder 31 in a front view. The receiving net 32 formed in the above is provided.

As shown in FIG. 3, the handling cylinder 31 has a scraping portion 33 located on the front side of the machine body and scraping the cut grain culm toward the rear side of the machine body, and a scraping portion 33 located on the rear side of the machine body and cutting. A handling processing unit 34 for handling and processing grain culms is provided. The scraping unit 33 is configured to scrape the cut grain culm sent from the feeder 12 to the inlet 35 of the handling chamber 23 into the handling chamber 23 by the spiral blade 36. The handling processing unit 34 is provided with a plurality of rod-shaped members 37 extending along the rotation axis center direction at intervals in the circumferential direction, and a plurality of rod-shaped handling members 37 project radially outward from each rod-shaped member 37. It is configured to have teeth 38. Below the scraping portion 33, a threshing inlet plate 78 as a guide member for receiving and guiding the cut grain culm is provided. The threshing inlet plate 78 will be described later.

In the handling chamber 23, the harvested grain culms are thrown in from the feeder 12, and the handling treatment (threshing treatment) is performed by the handling cylinder 31 and the receiving net 32. The handling cylinder 31 is arranged in a rearward tilting posture so that the rotary shaft core X is in an oblique posture in which the rotation shaft core X is gradually raised toward the rear side of the machine body. Similar to the handling cylinder 31, the receiving net 32 is also deployed in a rearwardly inclined posture in a side view.

As shown in FIG. 3, the sorting processing unit 24 swings and transfers the threshed product leaked from the handling chamber 23 backward, while the second product such as grains and branched grains and waste straw waste. A rocking sorting device 39 for sorting grains, a first product collecting unit 40 for collecting grains, a second product collecting unit 41 for collecting second products, a wall insert 42 for sending sorting wind to the rocking sorting device 39, and the like are provided. Has been done.

As shown in FIG. 2, the grains collected by the first product collecting section 40 are conveyed to the inside of the grain tank 5 by the grain raising device 40A provided on the outside of the right wall portion 26. The second product collected by the second product collecting unit 41 is passed through an opening 41B (see FIG. 6) formed in the right wall portion 26 by the second product reducing device 41A provided on the outside of the right wall portion 26. It is reduced to the inside of the handling room 23.

[Frame structure]
As shown in FIGS. 6 and 8, the right side wall portion 26 located on the right side of the left and right side wall portions 26 and 27 has a wall surface covering the whole, and the front side of the machine body is narrow in the vertical direction. It is formed wider in the vertical direction toward the rear side of the fuselage. The right side wall portion 26 is bolted to the main frame 20 with the lower end portion mounted on the upper surface of the main frame 20.

The right side wall portion 26 will be described.
The right side wall portion 26 includes a front side strut 43 located at the front portion, a rear side strut 44 located at the rear portion, and two intermediate strut 45, 46 provided at intervals in the front and rear intermediate portions. An upper connecting body 47 connected to the upper ends of the front side support 43, the rear side support 44, and the two intermediate support columns 45 and 46 and extending in the front-rear direction, and an upper connecting body 47 located below the upper connecting body 47. It is located laterally inside the columns 43 to 46, and is provided in a plate shape that covers the intermediate connecting body 48 connecting the columns 43 to 46 and between the intermediate connecting 48 and the main frame 20. , Each column 43 to 46, an intermediate portion connecting body 48, and a wall surface portion 49 integrally connected to the main frame 20 are provided. Further, the front end portion of the right side wall portion 26 is provided with a front side support portion 50 located on the outer side of the scraping portion 33. The rear strut 44 has an upper strut portion 44A and a lower strut portion 44B, which are integrally connected to each other.

As shown in FIGS. 7 and 8, the upper connecting body 47 has a substantially lateral U-shaped cross-sectional shape, and extends from the front side support column 43 to the rear side support column 44 over the entire front-rear direction. The upper connecting body 47 includes a front side connecting body portion 47A and a rear side connecting body portion 47B which are connected in a series. Further, reinforcing ribs 51 are provided in the U-shaped inner groove portion at appropriate intervals.

As shown in FIGS. 6 and 8, the intermediate portion connecting body 48 has a substantially horizontal U-shaped cross-sectional shape that is wide in the vertical direction, and extends from the front side support column 43 to the rear side support column 44 over the entire front-rear direction. ing. Reinforcing ribs 52 are provided at appropriate intervals in the U-shaped inner groove portion.

The right outer end portion of the top plate 30 is supported on the upper surface of the intermediate portion connecting body 48. A horizontal flange portion 30R provided on the left outer end portion of the top plate 30 is placed and supported on the upper surface of the intermediate portion connecting body 48. The flange portion 30R of the top plate 30 is bolted to the upper surface at a plurality of locations at appropriate intervals in the front-rear direction. A regulating portion 54 is formed on the upper surface of the intermediate portion connecting body 48 by bending upward in an L shape at the end portion on the right side of the portion on which the flange portion 30R of the top plate 30 is placed. As will be described later, the regulation unit 54 has a guide function for restricting the position of the top plate 30 in the left-right direction when the top plate 30 is slid in the front-rear direction.

The left side wall portion 27 will be described.
As shown in FIGS. 4, 5, 7, and 8, the left wall portion 27 located on the left side has a shape in which the front side of the machine body is narrow in the vertical direction and the rear side of the machine body is gradually widened in the vertical direction. There is. The left side wall portion 27 has a first structure that connects the front side column 55 located at the front portion, the rear side column 56 located at the rear portion, the upper end portion of the front side column 55, and the upper end portion of the rear side column 56. The sideways connecting body 57, the second sideways connecting body 58 connecting the front side support 55 and the rear side support 56 below the first sideways connecting body 57, and the first sideways connecting body 57 and the second sideways connecting body 57. A plurality (three) vertically oriented connecting bodies 59 connecting the 58 are provided. Further, the lower side plate-shaped portion 60, which is located on the lower side of the second laterally oriented connecting body 58 and is formed in a substantially triangular shape in the side view so as to be wider in the vertical direction toward the rear side of the machine body, and is located on the rear side of the machine body. A rear side plate-shaped portion 61 that is wide in the vertical direction is provided. Further, the front end portion of the left side wall portion 27 is provided with a front side support portion 62 located on the outer side of the scraping portion 33. The rear support column 56 is a lower support column portion 56A extending in the vertical direction at the rear end portion of the rear side plate-shaped portion 61, and an upper support column portion 56B connecting the rear ends of the first lateral connecting body 57 and the second lateral connecting body 58. Etc., and they are integrally connected to form a support column on the rear side.

The left side wall portion 27 is formed with an opening 63 that is largely open at a portion surrounded by the second lateral connecting body 58, the lower side plate-shaped portion 60, and the rear side plate-shaped portion 61. The opening 63 is closed by four lids 64. Each of the lids 64 is detachably supported along the left-right direction of the machine body. That is, as shown in FIG. 8, the lid 64 is bolted in a state where the lower end is placed on the horizontal surface of the upper end of the lower plate-shaped portion 60, and the upper end is the side surface of the second lateral connecting 58. It is bolted to. The lid 64 can be removed outward on the left side (to the right in FIG. 8) when the bolt connection is released.

As also shown in FIG. 7, the left side wall portion 27 includes a front side support 55, a rear side support 56, a first horizontal connection 57, a second horizontal connection 58, three vertical connections 59, and a lower portion. The side plate-shaped portion 60 and the rear side plate-shaped portion 61 are integrally connected to each other, forming a frame structure having high rigidity as a whole. The left side wall portion 27 is provided so as not to overlap the opening 63 when viewed from the side of the machine body. Therefore, the left side wall portion 27 corresponds to a support frame that supports the grain tank 5.

As shown in FIG. 8, the first lateral connection 57 is provided so as to be located on the outer side (an example of one horizontal side) of the second horizontal connection 58, and is on the left side of the grain tank 5. The overhanging portion 65 overhanging to the outside is supported from below. The first laterally oriented connecting body 57 has a substantially laterally U-shaped cross-sectional shape, and extends from the front side column 55 to the rear side column 56 over the entire front-rear direction. Further, reinforcing ribs 66 are provided in the U-shaped inner groove portion at appropriate intervals.

As shown in FIG. 8, the second lateral connecting body 58 is provided so as to be located on the left outer side of the handling cylinder 31 and facing the handling cylinder 31. In the second laterally oriented connecting body 58, the side surface 58a on the laterally inward side facing the handling cylinder 31 is formed in a smooth plane along the vertical direction. The upper portion of the second laterally oriented connecting body 58 is formed to have a width wider than the width of the lower portion.

To add an explanation, the second lateral connecting body 58 has a hollow tubular shape, and the upper portion is formed wide in the lateral direction and the lower portion is formed narrow in the lateral direction. The laterally inward side surface 58a facing the handling cylinder 31 is formed in a flat vertical plane from the upper end to the lower end. On the other hand, the lateral outer side surface opposite to the handling cylinder 31 is formed in a staircase shape so that the upper side is located on the outer side and the lower side is located on the inner side.

The receiving net 32 is provided in a state of being continuously connected in the circumferential direction downward with respect to the laterally inward side surface 58a of the second laterally oriented connecting body 58, and the connecting bracket 67 is the width of the second laterally oriented connecting body 58. It is bolted to the lateral outer side of the lower part of the narrow.

The second horizontal connecting body 58 is provided so as to project laterally outward from the left outer end portion of the top plate 30, and the top plate 30 is placed and supported on the upper portion of the second horizontal connecting body 58. A mounting portion 68 and a connecting body supporting portion 69 that supports the vertically oriented connecting body 59 on the lateral side and outer side of the top plate mounting portion 68 are provided.

To add an explanation, the upper surface 58b of the second lateral coupling 58 is formed by a flat horizontal plane from the right end to the left end. In the top plate mounting portion 68, a flange portion 30L in a horizontal posture provided at the left outer end portion of the top plate 30 is mounted and supported. The flange portion 30L of the top plate 30 is bolted to the top plate mounting portion 68 at a plurality of locations at appropriate intervals.

Of the upper surface 58b of the second horizontal connecting body 58, the lower end portion of the vertical connecting body 59 is integrally connected in the connecting body support portion 69. As will be described later, the vertical connecting body 59 has a guide function for restricting the position of the top plate 30 from shifting in the left-right direction when the top plate 30 is slid in the front-rear direction.

As shown in FIG. 7, the vertical connecting body 59 is formed in a substantially U shape in a plan view, the upper end thereof is integrally connected to the first horizontal connecting body 57, and the lower end portion is connected to the second horizontal connecting body 58. They are integrally connected.

As shown in FIG. 4, in the grain tank 5, the bottom surface of the bottom surface in a downwardly inclined posture on the front side of the bottom surface formed in the shape of a lower constriction is the left wall portion via the front side support 70. It is placed and supported on the upper part of 27 and the upper part of the right side wall portion 26. The bottom surface of the rear-up tilted posture on the rear side is placed and supported on the upper part of the left side wall portion 27 and the upper part of the right side wall portion 26 via the rear side support 71. As shown in FIG. 8, the rear side support 71 is provided on both the left and right sides, and the right rear side support 71 is supported by the upper part of the right side wall portion 26, that is, the upper connecting body 47, and is bolted. .. The left rear side support 71 is supported by the upper part of the left side wall portion 27, that is, the first lateral connecting body 57, and is bolted.

As shown in FIG. 4, the vertical connecting body 59 located at the foremost part of the three vertical connecting bodies 59 is provided in a state of being located below the bottom screw 5A of the grain tank 5 in a side view. ing. Further, the vertical connecting body 59 located at the rearmost portion of the three vertical connecting bodies 59 is provided in a state of being located below the output shaft 6a of the engine 6. The vertical connecting body 59 located in the middle of the front and rear is provided in a state of being located below the tubular member 72 through which the counter shaft (not shown) for power transmission is inserted.

[Receiving net]
As shown in FIG. 5, the receiving net 32 is divided into four along the rotation axis direction of the handling cylinder 31, and each divided receiving net is detachably supported along the lateral direction. The receiving net 32 is divided at the same position as the lid 64 on the left wall portion 27 along the rotation axis direction of the handling cylinder 31, and in the same direction, that is, on the left side of the machine body (right side in FIG. 8). It is removable toward you.

The receiving net 32 is composed of two receiving net constituents 73 and 74 divided along the circumferential direction of the handling cylinder 31. The net receiving structure 73 on the right side is received and guided by the arc-shaped guide members 76 attached to the front and rear side surfaces of the partition member 75, and is supported in a state where the right end portion is in contact with the intermediate portion connecting body 48 on the right side. Has been done. Then, the left end portion is bolted to the relay bracket 77 provided at the connection portion of the left and right receiving net components 73 and 74. The right end of the net receiving structure 74 on the left side is bolted to the relay bracket 77, and the left end is bolted to the second lateral connecting body 58.

Therefore, the net receiving structure 74 on the left side can be removed to the outside on the left side through the opening 63 which is opened by removing the lid body 64 by releasing the connection with the plurality of bolts. After removing the net receiving structure 74 on the left side, the net receiving structure 73 on the right side can be removed by releasing the bolt connection to the relay bracket 77.

[Threshing entrance plate]
As shown in FIG. 3, a threshing inlet plate that guides the harvested culm transported by the feeder 12 to the entrance of the handling chamber 23 is below the front side portion of the machine body corresponding to the scraping portion 33 of the handling cylinder 31. 78 is provided. The threshing inlet plate 78 is curved so as to connect from the carry-out port of the feeder 12 to the inlet 35 of the handling chamber 23.

As shown in FIG. 11, the threshing inlet plate 78 is divided into a split plate portion 79 on the right side and a split plate portion 80 on the left side at the separation surface in the central portion in the left-right direction. Of the threshing inlet plate 78, the right split plate portion 79 is bolted to the right side support plate 81 in a partially overlapped state. As shown in FIG. 12, a hexagonal hole with which a hexagon wrench can be engaged is formed in the head of the bolt Bo. The bolt head has a dish shape and can be installed without protrusions. The left split plate portion 80 is bolted to and from the left side support plate 82 by a vertical flange connection. The front ends of the left and right split plate portions 79 and 80 are bolted to a support member (not shown) located on the lower side and extending in the left-right direction. The left and right split plate portions 79 and 80 are connected to each other by lateral bolts (not shown) on the lower side in the middle of the left and right. Although not shown, the split plate portion 80 on the left side is interposed with the side support plate 82 on the left side with a sealing member made of sponge or the like.

The threshing inlet plate 78 can be easily removed by releasing the bolt connection even when it is worn by the flow of crops. That is, with the feeder 12 removed in advance, the bolt connection of the right split plate portion 79 with the lower support member, the right side support plate 81, and the left split plate portion 80 is released, and the front of the machine body is released. Can be removed to the side. The left split plate portion 80 can be removed from the front side of the machine body by releasing the bolt connection between the support member and the right side support plate 82.

〔Top board〕
The top plate 30 is provided in a substantially arc shape in a front view so as to substantially follow the rotation locus of the outer end portion of the handling cylinder 31. As shown in FIG. 8, the portion of the top plate 30 located on the right side is formed in a smooth arc shape. The portion of the top plate 30 located on the left side is formed in a flat plate shape. The top plate 30 is integrally formed in a state of being connected in a series along the circumferential direction.

As described above, the flange portion 30L on the left side of the top plate 30 is mounted and supported on the top plate mounting portion 68 on the upper surface of the second lateral connecting body 58, and the flange portion 30R on the right side of the top plate 30 is the intermediate portion. It is placed and supported on the upper surface of the connecting body 48. The portion of the top plate 30 that extends from the portion corresponding to the upper part of the scraping portion 33 of the handling cylinder 31 to the portion corresponding to the upper portion of the handling processing portion 34 of the handling cylinder 31 (movable top plate portion 83) is the threshing apparatus main body. The part (the part other than the top plate in the threshing device 4) is configured to be removable toward the rear side of the machine body.

That is, as shown in FIG. 9, substantially the entire upper portion of the top plate 30 that covers the upper part of the handling cylinder 31 is configured to be removable toward the rear side of the machine body along the direction of the center of rotation axis, and the front end of the top plate 30. The front wall portion 30F provided in the portion is provided in a state of being fixed to the threshing device main body portion (specifically, the front wall portion 29). The movable top plate portion 83 is divided into two parts, a front side top plate portion 83F and a rear side top plate portion 83B, along the front-rear direction of the machine body.

As shown in FIG. 10, the collar portion 84 is provided in a state of extending from the front wall portion 30F toward the rear of the machine body, and the front end portion of the movable top plate portion 83 is intimately fitted to the inner surface portion of the collar portion 84. It is installed. A sealing material 85 made of sponge is interposed between the flange portion 84 and the front end portion of the movable top plate portion 83 over the entire circumference in the circumferential direction. The front wall portion 30F is in a backward tilted posture in order to avoid interference with the cabin 2. Further, a horizontal mounting portion 86 provided at the lower end portion is fixed to the upper surface of the front wall portion 29 of the threshing device 4 by bolt connection. A plurality of reinforcing ribs 87 are provided over the front wall portion 29 and the mounting portion 86.

Then, the movable top plate portion 83 can be removed and removed toward the rear side of the machine body along the direction of the rotation axis of the handling cylinder 31. When the movable top plate portion 83 is removed, the top plate 30 is formed by the regulating portion 54 provided on the upper surface of the intermediate portion connecting body 48 and the vertical connecting body 59 provided on the upper surface of the second horizontal orientation connecting body 58. It is guided so that it does not shift in the lateral direction, and can be smoothly moved backward.

When removing the movable top plate portion 83, first, the exterior cover 17 is oscillated outward on the lateral side around the upper shaft core to open the lateral outer side of the threshing device 4. Then, the bolts on the left and right sides of the movable top plate portion 83 are released from the side of the machine body. Next, after removing the rear wall portion 28 of the threshing device 4, the rear side top plate portion 83B is pulled out backward while sliding the upper surface of the intermediate portion connecting body 48 and the upper surface of the second lateral connecting body 58 (FIG. FIG. 9). Further, the front side top plate portion 83F is slid and pulled out backward to be taken out. When the rear top plate portion 83B and the front side top plate portion 83F are removed in this way, the space above the handling cylinder 31 is greatly opened, so that the handling cylinder 31 can be viewed from the outside of the rear side of the machine or the outside of the side of the machine. Maintenance work such as repair and inspection and removal of clogged straw waste can be easily performed.

The handling chamber 23 is provided with a dust feeding valve 88 located on the inner surface side of the top plate 30 to transfer the threshed product from the front side of the machine to the rear side of the machine. Each of the plurality of dust sending valves 88 is attached to the inner surface of the top plate 30 and is provided so as to extend substantially spirally while being located on the outer peripheral side of the handling cylinder 31. That is, it is provided with a predetermined feed angle so as to transfer the threshed product to the rear side of the machine body with respect to the rotation of the handle 38.

Each of the plurality of dust feed valves 88 has a fixed dust feed valve portion 88a attached to the top plate 30 in a fixed position and a fixed dust feed valve portion 88a adjacent to each other in the circumferential direction, and the feed angles are increased by swinging. A movable dust valve portion 88b that can be changed and adjusted is provided.

As shown in FIG. 8, the fixed dust valve portion 88a is attached to the inner surface of the arc-shaped portion on the right side of the top plate 30, and the movable dust valve portion 88b is attached to the inner surface of the flat plate-shaped portion on the left side of the top plate 30. It is installed. Although not shown because it is a well-known configuration, the movable dust valve portion 88b is supported so as to be swingable around the axis of the support shaft 89, and the swing angle can be changed and adjusted manually. There is.

[Another Embodiment]
(1) In the above embodiment, the front end portion of the movable top plate portion 83 is in close contact with the inner surface portion of the collar portion 84 with respect to the collar portion extending from the front wall portion 30F of the top plate 30 toward the rear of the machine body. However, instead of this configuration, the front end portion of the movable top plate portion 83 may be fitted and mounted in close contact with the outer surface portion of the collar portion 84.

(2) In the above embodiment, the sealing material 85 is interposed between the flange portion 84 and the front end portion of the movable top plate portion 83. Instead of this configuration, for example, the collar portion 84 and the movable top plate portion 83 are movable. When the top plate portion 83 is fitted, the tapered surface may be formed so as to gradually become dense.

(3) In the above embodiment, the front wall portion 30F of the top plate 30 is provided in a fixed state, but the front wall portion 30F may also be configured to slide and move together with the movable top plate portion 83.

(4) In the above embodiment, the movable top plate portion 83 is divided into two in the front-rear direction, but the present invention is not limited to this configuration, and the movable top plate portion 83 may be integrally formed in the front-rear direction. Alternatively, the configuration may be divided into three or more.

The present invention can be applied not only to a normal type combine but also to a self-removing type combine as long as the combine is provided with the grain tank located above the threshing device.

4 Threshing device 5 Grain tank 23 Handling room 30 Top plate 30F Front wall 31 Handling cylinder 32 Receiving net 33 Scraping part 34 Handling processing part 78 Threshing inlet plate (guide member)
83 Movable top plate part 84 Collar part 85 Sealing material

Claims (5)

A threshing device for threshing the harvested grain in the handling chamber and a grain tank located above the threshing device and storing the grains after the threshing process by the threshing device are provided.
The handling chamber is provided with a handling cylinder that rotates around the front-rear shaft core and an arc-shaped receiving net provided along the outer peripheral portion of the handling cylinder.
The handling cylinder is provided with a scraping portion located at the front portion of the handling barrel to scrape the cut grain culm and a handling processing unit located behind the scraping portion to handle and process the harvested culm. ,
Of the top plate covering the upper part of the handling chamber, the portion extending from the portion corresponding to the upper part of the scraping portion to the portion corresponding to the upper part of the handling processing portion can be removed and removed from the threshing device main body to the rear side of the machine body. Combines that are configured in. A front wall portion fixed to the threshing device main body portion is provided at the front end portion of the top plate.
A collar is provided so as to extend from the front wall toward the rear of the aircraft.
The combine according to claim 1, wherein the front end portion of the movable top plate portion of the top plate, which is provided on the inner surface portion of the collar portion so as to be removable, is fitted and mounted in close contact with each other. A front wall portion fixed to the threshing device main body portion is provided at the front end portion of the top plate.
A collar is provided so as to extend from the front wall toward the rear of the aircraft.
The combine according to claim 1, wherein the front end portion of the movable top plate portion of the top plate provided on the outer surface portion of the collar portion is fitted and mounted in close contact with each other. The combine according to claim 2 or 3, wherein a sealing material is interposed between the collar portion and the front end portion of the movable top plate portion. A guide member for guiding the thrown culm is provided below the scraping portion.
The combine according to any one of claims 1 to 4, wherein the guide member is configured to be removable toward the front side of the machine body.

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