KR102330975B1 - Grain transfer unit with grain transfer cover and grain transfer cover, and combine with grain transfer unit - Google Patents

Abstract

Disclosed are a grain transport cover, a grain transport unit including the same, and a combine including the grain transport unit. According to the present invention, the grain transport cover is installed on a transport part in a lower portion of a threshing device of a combine to allow small impurities or soil other than grain entering together with the grain to pass downwards to separate the impurities or the soil from the grain. The grain transport cover comprises: a cover body made of a steel plate, having an arc-shaped cross section, and having one or more divided large openings; and a grain trap attached to the cover body, and dividing the large openings into a plurality of through holes of a narrow and long slit shape to allow small impurities or soil other than grain to pass therethrough and filter out only the grain. The grain trap consists of round bars of a rod shape with a round cross section. The round bars can be individually and freely rotated without interference with each other to prevent damage to commercial value, caused as sorted grain is caught between a transport screw and the grain transport cover and damaged in a grain transport process.

Description

A grain transfer unit comprising a grain transfer cover and a grain transfer cover, and a combine comprising a grain transfer unit

The present invention relates to a grain transfer cover, and in particular, a threshing device of a normal type combine (whole culm discharging type combine) of a type that threshes by putting the stems and ears of grains mowed through the harvesting unit at the same time into the threshing unit. It relates to a combine including a grain transfer cover and a grain transfer unit including the same, and a grain transfer unit installed in the lower transfer unit.

An agricultural vehicle that continuously performs a series of processes of cutting grain while driving, sorting/separating grain and gumbul from the cut grain and temporarily storing the selected grain, is usually called a 'combine'. The combine is usually composed of a mowing unit, a threshing unit, a sorting unit, a straw discharge unit, and a grain tank, and is largely divided into a self-threshing type combine and a normal type combine in terms of structure and function.

The threshing type combine is a generally well-known type of threshing by putting only the ears into the threshing part while transporting the harvested grains parallel to the central axis of the threshing trough. It is a type of combine that threshes by putting the stems and ears of grain mowed through the harvesting unit at the same time in the threshing unit.

As described in a number of prior documents, including Japanese Patent Application Laid-Open No. 2010-239980 and Japanese Patent Application Laid-Open No. 2014-193115, the normal combine combines a mowing unit for cutting upright grains and a threshing device, a threshing unit, and a mowing unit. It consists of a feeder that transfers the mowed grains to the threshing device, a sorting unit that sorts the threshed grains, and a grain tank that stores the sorted grains.

Unlike the self-threshing combine combine, the lower portion of the transfer passage (the passage in which the transfer screw for transferring the sorted grains to the grain tank is arranged) constituting the transfer unit below the threshing unit is opened, and the grain is in the open portion. A transfer cover is installed. At this time, the grain transfer cover serves as a sieve to separate small contaminants or soil that flows in together with grain grains after sorting treatment and transfer only grains.

As disclosed in Japanese Patent Application Laid-Open No. 2013-169202, the conventional grain transfer cover applied to a normal combine is a plate-shaped body disposed in an opening formed below the transfer screw, and the cover surface (indicated by the reference numeral '77c') Part), it is composed of a perforated plate with a number of holes (the part marked with the reference numeral '81') through which small contaminants or soil that flows in together with the grain after threshing treatment are formed.

Since this conventional grain transfer cover has a simple configuration in which a plurality of holes are formed by simply perforating the cover surface, it has advantages in terms of cost and production as much as the simple configuration, but it is used to transfer grain grains with relatively large particles such as soybean. In the process, there is a problem that damage such as crushing or breaking occurs due to grains caught between the edge of the hole formed in the conveying screw and the cover surface, thereby damaging the commercial properties.

Japanese Patent Laid-Open No. 2010-239980 (published on October 28, 2010) Japanese Patent Laid-Open No. 2014-193115 (published on October 9, 2014) Japanese Patent Application Laid-Open No. 2013-169202 (published on 09.02. 2013)

The technical problem to be solved by the present invention includes a grain transfer cover and a grain transfer cover that can prevent commercial properties from being damaged by being caught between the transfer screw and the grain transfer cover in the process of transferring the grain grains that have undergone the screening process It is to provide a combine comprising a grain transfer unit, and a grain transfer unit.

According to one aspect of the present invention as a means of solving the problem,

In the grain transfer cover installed in the transfer part of the lower part of the threshing device of the combine to separate from the grain by passing small contaminants or soil other than the grain flowing in with the grain down,

The grain transfer cover,

a cover body made of an iron plate, having an arc-shaped cross-section, and having a large-area opening partitioned by at least one; and

A grain trap that is attached to the cover body and divides the large-area opening into a plurality of narrow and long slit-shaped through-holes to pass small contaminants or soil other than grains and to filter only grains;

The grain trap provides a grain transfer cover, characterized in that the cross section is composed of round rods in the shape of a round bar, each round bar is independently rotated freely without mutual interference.

Here, the grain trap is formed in an arc shape with the round bars, and is attached to one side of the outer surface portion of the cover body having a large-area opening and the other side opposite to the other side of the round bars so as to rotatably support one end and the other end of each of the round bars. It may be composed of a pair of round bar support members.

Preferably, the grain trap is attached to the central bridge portion of the cover body defining the large-area opening, and may further include an arc-shaped intermediate support member having a plurality of round bar through holes corresponding to each of the round bars. have.

In addition, the round bars are arranged at equal intervals on the outer surface of the cover body through the pair of round bar support members or the pair of round bar support members and the intermediate support member to form a plurality of slit-shaped through holes of the same size. It may be a configuration to form.

In this case, each of the round bars may be composed of a single rod-shaped steel material having a round cross-section, or may have a configuration in which an elastic layer is formed by coating the surface of a steel material having a round bar-shaped cross-section with rubber or silicone.

And the cover body integrally has a binding flange coupled to a plate-shaped first case member defining the transfer passage at one end in a radial direction, and a second case member opposite to the first case member at the other end of the opposite part. It may be of a configuration having at least two or more locking members to be locked.

According to another aspect of the present invention as a means of solving the problem,

a transfer screw disposed in the transfer passage of the transfer unit located below the threshing apparatus;

a transfer case surrounding the transfer screw and partitioning the transfer passage; and

The grain transfer cover according to the above-described aspect installed in the lower opening of the transfer passage to pass small contaminants or soil other than grains introduced together with the grain at the time of harvest to separate it from the grain; includes;

The transfer case is

a plate-shaped first case member disposed around one side of the transfer screw;

It provides a grain conveying unit of the combine, characterized in that it consists of a plate-shaped second case member opposite to the first case member with the feed screw interposed therebetween.

In addition, according to another aspect of the present invention, it provides a combine, preferably a normal type combine, comprising a grain conveying unit according to the other aspect.

According to the grain transfer unit including the grain transfer cover and the grain transfer cover according to an embodiment of the present invention, the large-area opening is divided into a plurality of narrow and long slit-shaped through holes in the cover body having the large-area opening. Grain traps are attached to allow passage of contaminants or soil smaller than grains by partitioning and filter only grains, and the round bars constituting the grain traps are configured to rotate freely without mutual interference.

Accordingly, in the process in which grain grains are transferred from one side to the other side according to the rotation of the transfer screw, contaminants or soil smaller than grains of grains fall down through the through hole and are separated from the grains, and the transfer screw and the grain transfer cover Even if the grains are caught between them, the friction with the grains is reduced by the rotation of the round bar, so that damage such as crushing or breaking grains in the transport process can be prevented or minimized.

1 is a side view of a normal type combine according to the present invention.
Figure 2 is a plan view of the normal type combine shown in Figure 1.
Figure 3 is a schematic view showing the internal structure of the threshing device applied to the combine of Figure 1.
Figure 4 is a bottom perspective view of the transfer unit shown in Figure 3 viewed from the bottom.
5 is an enlarged view of part 'A' of FIG. 3;
Figure 6 is an exploded perspective view of the grain transfer cover according to the embodiment of the present invention shown in Figure 5.
Figure 7 is a perspective view of the grain transfer cover according to the embodiment of the present invention shown in Figure 5 viewed from the transfer screw side.
Figure 8 is a perspective view of the grain transfer cover shown in Figure 5 viewed from the bottom opposite the transfer screw.
9 is a cross-sectional view of the grain trap.
Figure 10 is a view showing the operating state of the grain transfer cover.

Hereinafter, preferred embodiments of the present invention will be described in detail.

Terms used in the specification are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

As used herein, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification is present, and includes one or more other features or It is to be understood that the existence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded in advance.

Also, terms such as first and second may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

In addition, terms such as “…unit”, “…unit”, “…module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. can

In the description with reference to the accompanying drawings, the same reference numerals will be given to the same components for the same drawings, and the overlapping description thereof will be omitted. In the description of the present invention, when it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

First, let's look at the overall configuration of the combine (normal combine) to which the grain transfer unit including the grain transfer cover according to an embodiment of the present invention is mounted.

1 is a side view of a normal type combine related to the present invention, FIG. 2 is a plan view of the normal type combine shown in FIG. And Figure 3 is a schematic diagram showing the internal structure of the threshing device applied to the combine of Figure 1.

1 to 3, the combine applied to the present invention is a normal-type combine (forest input-type combine) in which the stems and ears of mowed grains are put into the threshing unit at the same time to thresh, and a pair of left and right crawlers running It includes a traveling body 2 provided with the device 1, a threshing device 3 mounted on the traveling body 2, and a grain storage tank 4 for storing the threshed grain.

In front of the grain tank 4, a driver's seat 5 equipped with various operating mechanisms for operating the gas is disposed, and in front of the threshing device 3, the crops are mowed freely oscillating up and down around the horizontal axis P1 of the gas. The feeder (Feeder, 6) for transferring the to the threshing device (3) is connected. And to the front end of the feeder 6, the harvesting part 7 which has a pre-width corresponding to the horizontal width of the traveling body 2 is connected.

Above the front end of the mowing unit 7, a rotary reel 8 that rotates so as to rake up upright crops and perform mowing treatment through a mowing device is installed. The harvesting unit 7 is configured to be able to elevate from the lowering working state lowered so as to be adjacent to the ground by the up-and-down swinging operation of the feeder 6 with respect to the threshing device 3 through the ascending non-working state raised from the ground. .

Grain temporarily stored in the grain tank 4 is discharged to a designated place outside the gas or other conveying device through the grain discharging device 9 . That is, the grains mowed by the harvesting unit 7 and transferred to the threshing device 3 through the feeder 6 and finished threshing are transferred to the grain tank 4 through an internal transfer device after a series of sorting processes to temporarily It can be stored and discharged to the outside according to the operator's operation of the grain discharging device 9 .

An engine 20, which is a power generating source, is mounted under the seat 10 of the driver's seat 5, and the transmission case 12 is disposed below the front of the body. A main transmission device (not shown) composed of a hydrostatic continuously variable transmission (HST) is disposed on one side of the transmission case 12 , and the engine power shifted from the main transmission device 22 is transferred to the inside of the transmission case 12 . The traveling transmission system is configured to be transmitted to the left and right crawler traveling devices 1 via a transmission device (not shown).

The main gear shift is implemented by manual operation of the main gear lever 15 disposed on the side panel 14 of the driver's seat 5 . The peripheral gear consists of a variable capacity hydraulic pump connected to the output shaft of the engine and a constant capacity hydraulic motor that outputs driving power. You can change the rotation speed (travel speed) and rotation direction (forward/reverse switching) of

The harvesting unit 7 is a rear plate 78 and a transfer deck 79 that form a bottom surface and a rear plate 78 that forms a rear surface in a harvesting unit frame 77 configured by connecting a rectangular pipe or an angle having an L-shape in cross section, left and right It may be a structure configured by connecting a pair of left and right side plates 70 and 71 forming the side, respectively, and a hair clipper type between the left and right side plates 70 and 71 along the front end of the transfer deck 79. ) of the mowing device 72 is arranged.

A rotary transfer auger 73 for transferring the crops cut by the mowing device 72 to the front end of the feeder 6 is installed across the left and right side plates 70 and 71 . The transfer auger 73 is a pair of left and right screw blades that transfer left and right so that the crops harvested are gathered toward the front end of the feeder 6 according to the rotation of the auger drum 74 on the outer peripheral surface of the large-diameter auger drum 74 . (75) is provided.

A rod-shaped transfer pin ( 76) is provided in plurality in the circumferential direction. The transfer pin 76 functions to introduce the grain transferred to the front end inlet of the feeder 6 through the transfer auger 73 after harvesting into the inlet (not shown) of the feeder 6 .

The crops drawn into the feeder 6 are sent to the threshing device 3 at the rear by the transfer conveyor 62 inside the feeder for subsequent processing. The threshing apparatus 3 is provided with the threshing part 30 which sweeps grain from the stem of the cropped crop. In addition, a sorting unit 31 disposed under the threshing unit 30 to perform a sorting process on the threshing treated product obtained through the threshing process, and a transfer unit for collecting the processed product obtained by the sorting process and transferring the grain tank 4 ( 32).

In the lower part of the rear end of the threshing device 3, the stem of the crop flowing out from the straw outlet 33 of the threshing unit 30 according to the threshing treatment or the long straw crumbs carried out to the rear by the sorting treatment are cut to an appropriate size and discharged to the outside. The threshing device 34 is provided, and the threshing unit 30 is a rotating bar-type barrel 304 and a threshing net 306 in the lower part of the barrel 300 centered on the barrel shaft 302 in the front-rear direction inside the class chamber 300 . ) is included.

The sorting part 31 includes the rocking|fluctuation sorting mechanism 310 which shakes|separates while conveying the threshing process material which passed through the threshing net 306 toward the back of a gas. In addition, the main tuyere 312 for supplying the main sorting wind to the swinging sorting mechanism 310, the secondary tuyere 314 for supplying the sub sorting wind to the swinging sorting mechanism 310, and 2 for the swinging sorting mechanism 310 and a secondary tuyere 316 for supplying sorting air for tea sorting.

The transfer unit 32 is a first grain transfer unit for collecting grain grains flowing down while receiving a sorting wind from the main tuyere 312 through the front end side of the shaking sorting mechanism 310 below the shaking sorting mechanism 310 . (35), and a second grain transfer unit (36) for collecting re-sorted grains and the like flowing down while passing through the rear end side of the swing sorting mechanism (310) and receiving the sorting wind of the secondary tuyere (316).

The first grain transfer unit 35 is provided with a first transfer screw 37 for transferring the recovered grain grains, and transfers the selected grain grains to the outlet side of the first transfer screw 37 at the upper end of the grain tank 4 . A bucket-type conveyer 40 conveyed by the And the second grain conveying unit 36 is a second conveying screw 38 connected to a device (not shown) for conveying the recovered grain (grain containing contaminants) to the threshing unit 30 or the sorting unit 31 . includes

4 is a bottom perspective view of the conveying unit viewed from the bottom, and FIG. 5 is an enlarged view of part 'A' of FIG. 3 , showing an enlarged view of the first grain conveying unit.

Hereinafter, the configuration of the first grain conveying unit will be described with reference to FIGS. 4 to 5 , but the second grain conveying unit may also have the same configuration as the first grain conveying unit shown in FIG. 4 .

4 to 5 , the first grain transfer unit 35 (hereinafter referred to as a 'grain transfer unit' for convenience) includes a transfer screw 37 disposed in the transfer passage P of the transfer unit 32 and , and a transfer case 39 that surrounds the transfer screw 37 and divides the transfer passage P. The transfer passage (P) has an open lower portion, and the grain transfer cover 50 is detachably installed in the opened portion.

The transfer case 39 includes a first case member 39a and a second case member 39b. The first case member 39a may be a plate-shaped structure disposed obliquely toward the feed screw 37 around one side (left side in the drawing) of the feed screw 37 , and the second case member 39b is the feed screw 37 . It may be a plate-shaped structure disposed approximately symmetrically with the first case member 39a with the screw 37 interposed therebetween.

As mentioned above, the transfer case 39 dividing the transfer passage P has an open lower portion, and the grain transfer cover 50 is detachably installed in the opened portion. The grain transfer cover 50 functions so that only the selected grains are moved to the other side by the transfer screw 37 by passing the small contaminants or soil introduced together with the grains to separate them from the grains.

With reference to FIGS. 6 to 8, a grain transfer cover according to an embodiment of the present invention will be described.

6 is an exploded perspective view of the grain transfer cover according to the embodiment of the present invention shown in FIG. 5 , and FIG. 7 is a perspective view of the grain transfer cover according to the embodiment of the present invention shown in FIG. 5 as viewed from the transfer screw side. And Figure 8 is a perspective view of the grain transfer cover shown in Figure 5 viewed from the bottom opposite the transfer screw.

6 to 8, the grain transfer cover 50 is largely composed of a cover body 52 and a grain trap (Grain trap, 56). The cover body 52 is made of an iron plate, has an arc-shaped cross section, and may have a large-area opening 520 partitioned by at least one or more, and a plurality of narrow and long slits for the large-area opening 520 are formed. ) A grain trap 56 is attached to the cover body 52 so as to be divided into through-holes 560 (see FIG. 5 ) in the form of .

As shown in the drawings ( FIGS. 6 to 8 ), the cover body 52 has a plate-shaped first case member 39a that is continuous along the longitudinal direction at one end in the radial direction and partitions the transfer passage P. At least two engaging members 54 integrally provided with a binding flange 53 coupled to the second case member 39b opposite to the first case member 39a at the other end of the opposing part. can do.

The grain trap 56 divides the large-area opening 520 into a plurality of narrow and long through holes 560 in the form of slits, thereby filtering out grains and contaminants having smaller particles than grains other than grains (eg gumbul). Only the soil or soil is passed down, and only the filtered grain is moved to the other side, preferably in the direction of the above-described bucket type conveyer 40 by the conveying screw 37 .

The grain trap 56 is composed of round rods 57 (or may be pipes) having a round cross section. Each round bar 57 is configured to be freely rotatable individually without mutual interference, so that in the process of transferring relatively large grain grains such as soybean, the transfer screw 37 and the grain transfer cover 50 Damage caused by pinching of the grain grains between them can be prevented or minimized.

The grain trap 56 is specifically, a pair of round bar support members 58a for supporting the round bars 57 having a round bar shape in cross section, and the round bars 57 being spaced apart at equal intervals and rotatable individually. , 58b). In some cases, an intermediate support member 59 may be further included to rotatably hold the middle portion of the round bars 57 so that the round bars 57 do not sag as shown in the drawings.

The pair of round bar support members 58a and 58b are manufactured in an arc shape, and are attached to one side of the outer surface of the cover body 52 having a large-area opening 520 and the other side opposite to the other end of each of the round bars 57 . and rotatably support the other end. And the intermediate support member 59 is also manufactured in an arc shape, is attached to the central bridge part 522 of the cover body 52 that divides the large-area opening 520, and penetrates a plurality of round bars corresponding to each of the round bars 57. It may be a configuration having a hole (symbol omitted).

As such, the grain trap 56 applied to the grain transfer cover 50 is a pair of round bar support members 58a and 58b or a pair of round bar support members 58a and 58b and an intermediate support member 59 through The round bars 57 are arranged at equal intervals on the outer surface of the cover body 52 and each is freely rotatably disposed, a plurality of slit-shaped through holes 560 of the same size between the adjacent round bars 57, Substantially, a hole through which impurities or soil passes) may be formed.

9 is a cross-sectional view of a grain trap, more specifically, a round bar constituting the grain trap.

Each of the round bars 57 may be composed of a single rod-shaped steel material (Steel material, 70) having a round cross-section, as shown in FIG. Unlike this, each of the round bars 57, as shown in FIG. 9 (b), covers the surface of the steel material 570 having a round bar shape in cross section with rubber or silicone to form an elastic layer 572, so that the round bars 57 ) Even if the grain collides with the surface, it may be of a configuration having elasticity so that the grain is safely protected from the collision.

As disclosed in Japanese Patent Application Laid-Open No. 2013-169202, the conventional grain transfer cover applied to a normal combine is a plate-shaped body disposed in an opening formed below the transfer screw, and the cover surface (reference numeral '77c' is It is configured in the form of a perforated plate with a number of holes (the part marked with the reference number '81') through which small contaminants or soil that flows in along with the grains after threshing treatment) are formed.

Since this conventional grain transfer cover has a simple configuration in which a plurality of holes are formed by simply perforating the cover surface, it has advantages in terms of cost and production as much as the simple configuration, but it is used to transfer grain grains with relatively large particles such as soybean. In the process, there is a problem that damage such as crushing or cracking occurs between the feed screw and the edge of the hole formed on the cover surface, thereby deteriorating the commercial properties.

On the other hand, according to an embodiment of the present invention, the large-area opening is divided into a plurality of narrow and long slit-shaped through-holes in the cover body having a large-area opening, so that contaminants or soil smaller than grains pass through and only the grains A grain trap to filter is attached, and the round bars constituting the grain trap are configured to be freely rotatable without mutual interference.

Accordingly, as shown in FIG. 10 showing the operating state of the grain transfer cover, in the process of transferring grain grains (g) to one side to the other side according to the rotation of the transfer screw 37, contaminants smaller than grains of grains (g) or Soil and soil fall down through the through hole 560 and are separated, and even if the grain (g) is caught between the transfer screw 37 and the grain transfer cover 50, the rotation of the round bar 57 causes the grain and grain (g) By reducing friction, grain damage can be prevented or minimized.

In the above detailed description of the present invention, only specific embodiments thereof have been described. However, it is to be understood that the present invention is not limited to the particular form recited in the detailed description, but rather, it is to be understood to cover all modifications and equivalents and substitutions falling within the spirit and scope of the invention as defined by the appended claims. should be

1 : Driving device 2 : Driving body
3: threshing device 4: grain tank
5: Driver's seat 6: Feeder
7: mowing part 8: rotary reel
9: grain discharging device 20: engine
30: threshing unit 31: screening unit
32: transfer unit 33: straw outlet
34: Altar 35: First grain transfer unit
36: second grain transfer unit 37: first transfer screw
38: second transfer screw 39: transfer case
50: grain transfer cover 52: cover body
53: binding flange 54: engaging member
56: grain trap 57: round bar
58a, 58b: round bar support member 59: intermediate support member
520: large-area opening 522: central bridge part
560: through hole 570: steel
572: elastic layer

Claims (8)

In the grain transfer cover installed in the transfer part of the lower part of the threshing device of the combine to separate from the grain by passing small contaminants or soil other than the grain flowing in with the grain down,
The grain transfer cover,
a cover body made of an iron plate and having an arc-shaped cross-section and a large-area opening; and
A grain trap that is attached to the cover body and divides the large-area opening into a plurality of narrow and long slit-shaped through-holes to pass small contaminants or soil other than grains and to filter only grains;
The grain trap has round rods having a round cross section and,
A pair of round bar support members formed in an arc shape and attached to one side of the outer surface of the cover body having a large-area opening and the other side of the opposite side to rotatably support one end and the other end of each of the round bars;
It is composed of an arc-shaped intermediate support member in which a plurality of round-bar through-holes are formed corresponding to each of the round bars,
Each round bar is independently freely rotatably supported without mutual interference by the pair of round bar support members and the intermediate support member,
A central bridge part is formed in the center of the cover body to divide and partition the large-area opening, and the intermediate support member is attached to an outer surface of the central bridge part.
delete delete The method of claim 1,
The round bars are arranged at equal intervals on the outer surface of the cover body through the pair of round bar support members or the pair of round bar support members and the intermediate support member to form a plurality of slit-shaped through holes of the same size Grain transfer cover, characterized in that.
The method of claim 1,
Each of the round bars is a grain transfer cover, characterized in that the surface of the steel material having a round cross section is coated with rubber or silicone to form an elastic layer.
The method of claim 1,
The cover body integrally has a binding flange coupled to a plate-shaped first case member defining a conveying passage at one end of the cover body, and the second case member opposite to the first case member is engaged at the opposite end of the cover body. Grain transfer cover, characterized in that it comprises at least two or more engaging members.
a transfer screw disposed in the transfer passage of the transfer unit located below the threshing apparatus;
a transfer case surrounding the transfer screw and partitioning the transfer passage; and
The grain transfer cover according to claim 1 installed in the lower opening of the transfer passage to pass small contaminants or soil other than grains introduced together with the grain at the time of harvest to separate it from the grain; includes;
The transfer case is
a plate-shaped first case member disposed around one side of the transfer screw;
A grain conveying unit of a combine, characterized in that it is composed of a plate-shaped second case member opposed to the first case member with the feed screw interposed therebetween.
A combine comprising the grain conveying unit according to claim 7.

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