JP2017012060A - Grain discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discharge grains more easily and quickly by a grain discharge device including an extensible conveyance cylinder.SOLUTION: An extensible second conveyance cylinder (30) includes an inside cylinder (32) connected to a tip (20b) of a first conveyance cylinder (20), and an outside cylinder (31) fitted to the outer periphery of the inside cylinder (32) movably in the extension direction. A base end part (32a) of the inside cylinder (32) is inserted into the tip (20b) of the first conveyance cylinder (20) and fixed, and the inner diameter of the inside cylinder (32) is set to be smaller than the inner diameter of the first conveyance cylinder (20) and the inner diameter of the outside cylinder (31).SELECTED DRAWING: Figure 8

Description

  The present invention relates to a grain discharging apparatus.

  2. Description of the Related Art Conventionally, as a grain discharging device used for a combine or the like, one that discharges the grain in a Glen tank by a conveying wind supplied from a blower is known (for example, see Patent Document 1). This combine is provided with a cutting device on the front side of a chassis equipped with a traveling device, a control unit, a threshing device and a Glen tank on the upper side of the chassis, and the grain in the Glen tank is transferred to the bottom of the Glen tank. This is a configuration in which a feeding device that feeds inward is provided, a blower device is provided on the inlet side of the conveying cylinder, and a discharge cylinder for the grain discharge guide is provided on the outlet side of the conveying cylinder.

  In addition, a technique for making such a discharge tube extendable in the grain conveyance direction is known. (For example, see Patent Document 2)

JP 2011-155895 A JP 2009-201426 A

  However, since the length of the discharge cylinder for the grain discharge guide described in Patent Document 1 cannot be adjusted, it may take time for the discharge work depending on the positional relationship with the grain discharge destination. Further, although the length of the discharge cylinder described in Patent Document 2 can be adjusted, when the discharge cylinder is extended, the wind speed of the transfer air in the discharge cylinder is reduced, and the transfer efficiency is reduced. There is a problem that the time required for the discharging operation becomes long.

  This invention solves the subject mentioned above, and aims at providing the grain discharge apparatus which can discharge | emit a grain more easily and rapidly.

  The problems of the present invention are solved by the following technical means.

  The invention which concerns on Claim 1 is the 1st conveyance cylinder (20) connected to the air blower (61) for grain conveyance, and the expansion-contraction connected to the front-end | tip part (20b) of this 1st conveyance cylinder (20). A grain discharging apparatus including a free second transport cylinder (30), wherein the second transport cylinder (30) includes an inner cylinder connected to a tip (20b) of the first transport cylinder (20). (32) and an outer cylinder (31) fitted to the outer periphery of the inner cylinder (32) so as to be movable in the expansion / contraction direction, and the base end (32a) of the inner cylinder (32) is connected to the first conveying cylinder. The inner cylinder (32) is set to have a smaller inner diameter than the inner diameter of the first conveying cylinder (20) and the inner diameter of the outer cylinder (31). A grain discharging apparatus characterized by the above.

  According to a second aspect of the present invention, a taper (35) is formed on the inner peripheral surface of the base end portion (32a) of the inner cylinder (32) to reduce a step with the inner peripheral surface of the first transfer cylinder (20). The grain discharging apparatus according to claim 1.

  The invention according to claim 3 includes the first support member (22) that curves the upper part of the first transport cylinder (20) and supports the curved part from below. It is a discharge device.

  The invention which concerns on Claim 4 equips the lower part of a grain storage apparatus (7) with the drawing | feeding-out apparatus (62) which pays out the grain in this grain storage apparatus (7) to the said 1st conveyance cylinder (20) side. The grain according to claim 3, wherein when the stop switch (90) for stopping the discharge of the grain is operated, the blower (61) is stopped after the feeding device (62) is stopped. It is a grain discharger.

  The invention according to claim 5 includes a second support member (22) that supports the second transport cylinder (30) in a storage position, and is provided on an outer periphery of the outer cylinder (31) of the second transport cylinder (30). The reinforcing member (31A) that comes into contact with the second support member (22) when the second transport cylinder (30) is most shortened and supported by the second support member (22). This is a grain discharging device.

  According to a sixth aspect of the present invention, an expansion / contraction drive device (40) for extending / contracting the second transport cylinder (30) is disposed at a proximal end portion (32a) of the inner cylinder (32), and the expansion / contraction drive apparatus (40). The grain discharge according to claim 5, wherein a flange portion (44a) at a base portion of the cover (44) is fixed to a base end portion (32a) of the inner cylinder (32) via a fixture (44b). Device.

  According to the first aspect of the present invention, the second transfer cylinder (30) includes an inner cylinder (32) connected to the tip (20b) of the first transfer cylinder (20), and the inner cylinder (32). Since the outer cylinder (31) fitted to the outer periphery of the inner cylinder (32) so as to be movable in the expansion / contraction direction is provided, the outer cylinder (31) is moved relative to the inner cylinder (32) to expand and contract the second conveyance cylinder (30). The grain can be easily discharged regardless of the positional relationship with the discharge destination.

  Further, since the inner diameter of the side cylinder (32) is set smaller than the inner diameter of the first conveying cylinder (20) and the inner diameter of the outer cylinder (31), the wind speed of the conveying air in the inner cylinder (32) is The speed of the conveying wind in the one conveying cylinder (20) is increased, and the stagnation and clogging of the grains in the inner cylinder (32) can be prevented, and the grains can be discharged smoothly.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the inner periphery of the first transfer cylinder (20) is formed on the inner peripheral surface of the base end part (32a) of the inner cylinder (32). Since the taper (35) which reduces the level | step difference with a surface is formed, it reduces that the grain conveyed is damaged by the level | step difference in the connection part of a 1st conveyance cylinder (20) and an inner side cylinder (32). it can. Moreover, since the level | step difference in the 1st conveyance cylinder (20) and 2nd conveyance cylinder (30) which are the flow paths of the air ventilated from an air blower (60) is reduced, the pressure loss of air is reduced.

  According to the invention according to claim 3, in addition to the effect of the invention according to claim 2, the upper portion of the first transport cylinder (20) is curved, and the first support member (supporting the curved portion from below) 22), the front end (20b) of the first transfer cylinder (20) is located on the inner side regardless of the turning direction (extending direction) of the first transfer cylinder (20) and the second transfer cylinder (30). It is possible to prevent the base end portion (32a) of the cylinder (32) from being twisted, and to prevent the first transfer cylinder (20) from being detached from the inner cylinder (32) or from being bent. For this reason, the wind force from an air blower (60) can be supplied stably. Further, by supporting the curved portion of the first transport cylinder (20) from below by the support member (22), the rigidity of the curved portion can be increased.

  According to the invention according to claim 4, in addition to the effect of the invention according to claim 3, when the stop switch (90) for stopping the discharge of the grain is operated, the feeding device (62) is stopped. Since the blower (61) stops later, when the stop switch (90) is operated, the grains in the middle of conveyance remain in the first conveyance cylinder (20) and the second conveyance cylinder (30). The remaining grain can be discharged by continuing to blow out air from the blower (60).

  According to the invention of claim 5, in addition to the effect of the invention of claim 4, the second support member (33) for supporting the second transport cylinder (30) in the storage position is provided, and the second transport cylinder ( Reinforcing the second support member (33) in contact with the outer periphery of the outer tube (31) of 30) when the second transport tube (30) is shortened to the minimum and supported by the second support member (33). Since the member (31A) is provided, the deformation of the second transport cylinder (30) due to the contact between the support member (33) and the second transport cylinder (30) is suppressed, and the expansion and contraction operation of the second transport cylinder (30) is performed. Can be prevented.

  According to the invention of claim 6, in addition to the effect of the invention of claim 5, the telescopic drive device (40) for expanding and contracting the second transport cylinder (30) is connected to the base end (32a) of the inner cylinder (32). ) And the flange portion (44a) provided at the base portion of the cover (44) of the telescopic drive device (40) is connected to the base end portion (32a) of the inner cylinder (32) via the fixture (44b). Since it is fixing, the 2nd conveyance cylinder (30) can be extended-contracted smoothly.

It is a side view of a combine provided with a grain discharging device concerning an embodiment of the present invention. It is a top view of a combine provided with a grain discharging device concerning an embodiment of the present invention. It is a side view which shows the 1st conveyance cylinder and 2nd conveyance cylinder which concern on embodiment of this invention. It is a side view which shows the 1st conveyance cylinder and 2nd conveyance cylinder which concern on embodiment of this invention. It is a block diagram for control concerning the embodiment of the present invention. It is a flowchart which shows the information processing in the control apparatus which concerns on embodiment of this invention. It is a top view for explanation which shows the state where the grain discharge device concerning the embodiment of the present invention was turned and extended to the body of a combine. It is sectional drawing of the principal part in the grain discharge apparatus which concerns on Embodiment 1 of this invention. It is sectional drawing of the principal part in the grain discharge apparatus which concerns on Embodiment 2 of this invention. It is sectional drawing of the principal part in the grain discharge apparatus which concerns on Embodiment 3 of this invention.

Hereinafter, embodiments of a grain discharging apparatus according to the present invention will be described in detail with reference to the drawings.
[Embodiment 1]
The combine 1 provided with the grain discharging apparatus which concerns on Embodiment 1 is demonstrated based on FIG. 1 thru | or FIG. FIG. 1 is a side view showing a schematic configuration of the combine according to the embodiment. FIG. 2 is a plan view illustrating a schematic configuration of the combine according to the embodiment.

  In the following, for convenience, three directions orthogonal to each other are defined as a front-rear direction, a left-right direction, and a vertical direction, respectively, and the configuration of each part will be described according to this definition. The front-rear direction is the body length direction of the combine (airframe) 1, the left-right direction is the body width direction, and the up-down direction is the height direction of the body. These directions are defined for convenience in order to make the explanation easy to understand, and the present invention is not limited by these directions.

  As shown in FIGS. 1 and 2, the combine 1 includes a traveling device 3 disposed below the body frame 2, a reaping device 4 attached to the front end of the body frame 2, and an upper left side of the body frame 2. Threshing device 5 mounted on (one side), operation unit 6 disposed on the right front side on the fuselage frame 2, and upper right side (the other side) of the fuselage frame 2 and disposed behind the cab 6 A grain tank (grain storage device) 7 and a diesel engine (hereinafter referred to as an engine) 8 disposed on the machine body frame 2 and below the cab 6 are mounted. The blower cylinder 61 is connected to the bottom of the Glen tank 7 of the combine 1, and the first transfer cylinder 20 (a part of the discharge cylinder) is connected to the blower cylinder 61. Moreover, the combine 1 provided the air blower 60 in the entrance side of the 1st conveyance cylinder 20, and provided the discharge apparatus 70 for grain discharge | emission guidance in the exit side of the 2nd conveyance cylinder 30 (a part of discharge cylinder). Is. Here, the discharge cylinder is mainly composed of the first conveyance cylinder 20 and the second conveyance cylinder 30. Moreover, the grain discharging apparatus of this invention contains this discharge cylinder, the discharge apparatus 70, the ventilation cylinder 61 grade | etc.,.

  The traveling device 3 is provided below the body frame 2. The traveling device 3 transmits the driving force from the engine 8 to the pair of left and right crawler belts 3a to cause the combine 1 to travel.

  The reaping device 4 is provided in front of the body frame 2. The reaping device 4 is driven by the driving force from the engine 8 to harvest the culm and conveys the harvested culm to the threshing device 5. The reaping device 4 is operated via an operation panel switch 80 (see FIG. 5) described later. The reaping device 4 mainly includes a reaping portion 4a and a transport device 4e. The reaping power transmission mechanism transmits the driving force from the engine 8 to the reaping portion 4a and the conveying device 4e.

  The mowing unit 4a includes an auger frame 4b, an auger (not shown), a main cutting device 4c for harvesting corn straw, and a take-up reel 4d. The cutting unit 4a is provided so that the height in the vertical direction with respect to the machine body can be adjusted by a cutting unit lifting / lowering hydraulic cylinder (cutting unit lifting / lowering drive device, not shown) controlled by the control device 100 (see FIG. 5). The auger frame 4b has a bottom plate 4b1, a pair of left and right side plates 4b2 in the vehicle width direction, and a rear plate 4b3. The auger is disposed in the auger frame 4b along the vehicle width direction and is rotatably supported. The main cutting device 4c cuts the cereal meal by a reciprocating movable blade (not shown) passing through a gap in the front-rear direction formed on a fixed blade (not shown). The main cutting device 4c is moved up and down by a lifting cylinder (not shown). The main cutting device 4c is driven by the driving force transmitted from the engine 8 to cut the culm and takes the culm by driving the auger. The take-in reel 4d is used to take in the main cutting device 4c and the auger side while causing a planted culm. The pick-up reel 4d is provided such that the height in the vertical direction with respect to the cutting portion 4a can be adjusted by a pick-up reel lifting / lowering cylinder (pick-up reel lifting / lowering drive, not shown) controlled by the control device 100.

  The conveying device 4e is provided on the rear side of the cutting unit 4a, more specifically, between the cutting unit 4a and the threshing device 4e. The conveying device 4e conveys the cereals harvested by the main cutting device 4c from the harvesting portion 4a to the threshing device 5 by the driving force of the engine 8.

  The threshing device 5 is provided on the rear side of the reaping device 4 and on the side of the grain tank 7, and has an upper threshing portion (not shown) and a lower sorting portion (not shown). The threshing unit threshs the cereal that has been conveyed by the driving force from the engine 8. The sorting unit is a device that separates the grains from the impurities such as cocoons of cereals threshed by the threshing unit by the driving force from the engine 8.

  The driving unit 6 includes a driving seat for performing a driving operation, a cutting operation, or the like while the operator is seated. The driving unit 6 is provided on the front side of the body frame 2 and above the engine 8. Further, for example, an operation panel switch 80, a display panel (not shown), a cutting lift lever for performing a lifting operation of the cutting device 4, In addition, a discharge operation lever (not shown) for performing a raising / lowering operation, a turning operation, and an extension operation of the discharge cylinder is provided.

  The Glen tank 7 is a grain storage device that temporarily stores the grains selected by the threshing device 5. The Glen tank 7 is provided behind the operation unit 6 and on the right side of the vehicle body frame 2 in the vehicle width direction. A drain tube is connected to the Glen tank 7. The discharge cylinder conveys the grain in the grain tank 7 by the driving force from the engine 8 and discharges the grain to the outside of the grain tank 7. The grain in the Glen tank 7 is in the discharge cylinder, specifically, in the first conveyance cylinder 20 standing upright behind the Glen tank 7 and the second conveyance extending from the upper end of the first conveyance cylinder 20. The inside of the cylinder 30 is conveyed by the wind force from the blower 60 and discharged from the discharge device 70 to the outside.

  The engine 8 is mounted in an engine room (not shown) formed below the operation unit 6.

  The first transport cylinder 20 is a cylindrical member (inner diameter d1) formed of an elastic body (for example, a synthetic resin material) disposed on the rear side of the combine 1, and the one end portion 20a is a blow cylinder of the blower 60 described later. 61 is connected. The one end part 20a and the blower cylinder 61 are connected in close contact with the circumferential surface without any gap. A blower device 60 described later is disposed on the inlet side of the blower cylinder 61. Thereby, in the 1st conveyance cylinder 20, the grain which flowed in via the ventilation cylinder 61 is conveyed in the 1st conveyance cylinder 20 with an wind force, and flows in into the 2nd conveyance cylinder 30. FIG. Further, as shown in FIG. 3, the first conveying cylinder 20 is formed with a curved portion 20 </ b> A that is curved on the upper side on the rear side of the combine 1. As shown in FIGS. 3 and 4, the inner cylinder 32 of the second conveyance cylinder 30 is connected to the other end 20 b of the first conveyance cylinder 20. Further, the first transfer cylinder 20 is rotatable with respect to the machine body. Further, the first transfer cylinder 20 can be raised and lowered with respect to the machine body.

  The hydraulic cylinder operating shaft 21 is connected to a hydraulic cylinder 51 of a turning drive device 50 described later. The hydraulic cylinder action shaft 21 is formed in a cylindrical shape whose left-right direction coincides with the axial direction. With the hydraulic cylinder action shaft 21 as an action point (swivel axis), the bending portion cover 23 rotates up and down around the lifting shaft 23a with respect to the vertical portion cover 24. Thereby, the 2nd conveyance cylinder 30 connected with the 1st conveyance cylinder 20 raises / lowers with respect to a body.

  The vertical portion cover 24 is a cylindrical member that extends in the vertical direction from the vicinity of the upper surface of the body frame 2 to the vicinity of the lower end portion of the bending portion cover 23, and is below the bending portion 20 </ b> A in the first transport cylinder 20. It covers the straight part. Further, the vertical portion cover 24 rotates around the central axis of the cylindrical vertical portion cover 24 by the operation of an electric motor (not shown) of the turning drive device 50. Further, at the upper end portion of the vertical portion cover 24, a curved portion cover support portion 24a that supports the rear portion of the curved portion cover 23 so as to be rotatable around a lifting shaft 23a in the left-right direction extends upward.

  As shown in FIG. 3, the support member (first support member) 22 supports the first transport cylinder 20 from below in the bending portion 20 </ b> A. The support member 22 is in the form of a roller, and the upper side of the outer peripheral surface abuts on and supports the lower side of the outer peripheral surface of the first transport cylinder 20. The first conveying cylinder 20 is held horizontally by the support member 22 from the contact position with the support member 22 to the other end 20b, that is, a linear portion 20B in which the axial direction extends linearly is formed. . Thereby, the other end 20b of the first transport cylinder 20 is twisted with respect to the one end 30a of the second transport cylinder 30 regardless of the turning direction (extending direction) of the first transport cylinder 20 and the second transport cylinder 30. To prevent that.

  In the first transport cylinder 20, the vicinity of the bending portion 20 </ b> A, that is, the upper rear portion of the combine 1 in the front-rear direction is covered and protected by the bending portion cover 23.

  As shown in FIGS. 1 and 2, the second transport cylinder 30 is disposed on the upper side of the combine 1 and is extendable and contractable in the axial direction. As shown in FIGS. 3 and 4, the second conveyance cylinder 30 is a steel pipe having a double cylinder structure in which an inner cylinder 32 is inserted into an outer cylinder 31. The outer cylinder 31 can move forward and backward with respect to the inner cylinder 32. As shown in FIG. 8, the inner diameter d1 of the outer cylinder 31 is the same as the inner diameter d1 of the first transport cylinder 20. The outer diameter of the inner cylinder 32 is substantially the same as the inner diameter d1 of the outer cylinder 31, and is set slightly smaller than the inner diameter d1. Here, the same diameter includes substantially the same diameter (slightly smaller than the same diameter, slightly larger than the same diameter). One end (base end) 32a of the inner cylinder 32 (one end 30a of the second transfer cylinder 30) is inserted into the other end (tip end) 20b of the first transfer cylinder 20 and fixed in a connected state. ing. Further, a discharge device 70 described later is connected to the other end portion (tip portion) 31b of the outer cylinder 31 (the other end portion 30b of the second transfer cylinder 30).

  The length of the second transport cylinder 30 can be adjusted by an expansion / contraction driving device 40 described later via an operation panel switch 80 described later, and an extending direction can be adjusted by a turning driving device 50. For example, the second conveying cylinder 30 retracts the outer cylinder 31 to the retracted position with respect to the inner cylinder 32 (the inner cylinder 32 is accommodated in the outer cylinder 31) when the grain is not discharged, including when traveling. A) The length of the second transfer cylinder 30 in the axial direction is shortened, and the swivel drive device 50 is controlled to turn the first transfer cylinder 20 to the swivel storage position on the fuselage and lower the first transfer cylinder 20. And let the 2nd conveyance cylinder 30 be an accommodation state. At this time, the 2nd conveyance cylinder 30 is mounted and supported by the support member (2nd support member) 33 (refer FIG. 1) mentioned later. Further, for example, when moving to the grain discharge location, the second transport cylinder 30 extends the length of the second transport cylinder 30 by moving the outer cylinder 31 to the advanced position with respect to the inner cylinder 32. And the 1st conveyance cylinder 20 is turned to the turning overhanging position on the body, and the 1st conveyance cylinder 20 and the 2nd conveyance cylinder 30 are made into the overhanging state. At this time, the second transport cylinder 30 is detached from the support member 33.

  In the present embodiment, the retracted position is a position where the outer cylinder 31 is most retracted with respect to the inner cylinder 32 and the length of the second transport cylinder 30 is the shortest.

  In the present embodiment, the swivel storage position is the lowest position in the vertical direction of the second transport cylinder 30 (position where the second transport cylinder 30 is placed on the support member 33) as shown in FIGS. It is the position of the 1st conveyance cylinder 20 and the 2nd conveyance cylinder 30 in the state which is located and the discharge apparatus 70 of the 2nd conveyance cylinder 30 is located in the left front with respect to the hydraulic cylinder action shaft 21. In addition, when the first transport cylinder 20 and the second transport cylinder 30 are located at the swivel storage position, the swivel angle of the first transport cylinder 20 with respect to the machine body is referred to as a swivel storage angle.

  In the present embodiment, the advanced position refers to a position where the outer cylinder 31 is advanced to an intermediate position in the advanceable / retractable range in the axial direction with respect to the inner cylinder 32.

  The swivel overhang position is a position of the first transport cylinder 20 and the second transport cylinder 30 set in advance by an operator.

  Further, the second conveying cylinder 30 is provided with a reinforcing member 31 </ b> A at a position where the second conveying cylinder 30 comes into contact with a support member 33, which will be described later, in the stored state on the outer periphery of the outer cylinder 31. The reinforcing member 31 </ b> A reinforces a position where it comes into contact with a support member 33 described later in the housed state on the outer periphery of the outer cylinder 31. The reinforcing member 31 </ b> A is formed in a semi-cylindrical shape that covers the lower side of the outer periphery of the outer cylinder 31. The reinforcing member 31A is fixed to the outer cylinder 31 by means such as welding. The axial length of the reinforcing member 31 </ b> A is shorter than that of the outer cylinder 31, and only needs to be long enough to cover the position in contact with the support member 33.

  The support member 33 is disposed on the airframe and is disposed at a position for supporting the outer cylinder 31 from below in the stored state. The support member 33 has a leg portion 33a and an outer tube receiving portion 33b. The leg 33a is a rod-like member extending upward from the body. An outer tube receiving portion 33b is disposed at the upper end of the leg portion 33a. The outer cylinder receiving portion 33b is for placing the outer cylinder 31 thereon. The outer tube receiving portion 33 b has a convex curved surface on the lower side along the outer peripheral portion of the outer tube 31.

  The telescopic drive device 40 extends and retracts the second transport cylinder 30 by advancing and retracting the outer cylinder 31 relative to the inner cylinder 32 based on a control signal from the control device 100. Here, the expansion / contraction direction of the second conveyance cylinder 30 is the axial direction of the inner cylinder 32. The telescopic drive device 40 is fixed to one end portion 32 a of the inner cylinder 32 of the second transport cylinder 30. The expansion / contraction driving device 40 mainly includes a shaft member 44c, a movable member 44d, a motor 43, and an expansion / contraction driving device cover 44 that accommodates them. The telescopic drive device 40 can also be fixed to the bending portion cover 23.

  The shaft member 44 c is disposed so as to be separated from the inner cylinder 32 and the outer cylinder 31. On the outer peripheral surface of the shaft member 44c, a helical engagement groove (not shown) is formed over the entire circumference. The movable member 44d is fitted to the outer cylinder 31, and the shaft member 44c is rotationally driven by the motor 43, so that the movable member 44d slides along the shaft member 44c while engaging with the engaging groove. The movable member 44d is fixed to the outer periphery of the outer cylinder 31. That is, when the movable member 44d slides along the shaft member 44c while engaging with the engaging groove, the outer cylinder 31 moves relative to the inner cylinder 32, and the second conveying cylinder 30 expands and contracts. The motor 43 supplies a driving force for driving the movable member 44d. The motor 43 is controlled to be driven and stopped based on a control signal from the control device 100.

  The telescopic drive device cover 44 has a curved surface that is curved in the same manner as the outer peripheral surfaces of the outer cylinder 31 and the inner cylinder 32, and is disposed above the outer cylinder 31 and the inner cylinder 32. The flange portion 44a provided at the base portion of the telescopic drive device cover 44 is fixed to the one end portion 32a of the inner cylinder 32 via a fixture 44b. The outer cylinder 31 is movable forward and backward with respect to the telescopic drive device cover 44.

  By such a telescopic drive device 40, the outer cylinder 31 of the second transport cylinder 30 moves between the one end portion 32 a and the other end portion 32 b of the inner cylinder 32 (advancing and retracting range) with respect to the inner cylinder 32. The second transport cylinder 30 is the shortest when the outer cylinder 31 is most retracted from the inner cylinder 32. Further, the second transport cylinder 30 is the longest when the outer cylinder 31 is advanced most relative to the inner cylinder 32. The telescopic drive device 40 includes a discharge cylinder position sensor 40s (see FIG. 5) that detects the length of the second transport cylinder 30.

  The discharge cylinder position sensor 40s detects the length of the second conveyance cylinder 30 and outputs it to the control device 100 as a control signal.

  The turning drive device 50 turns the first transfer cylinder 20 with respect to the machine body based on a control signal from the control device 100, and moves the second transfer cylinder 30 up and down with respect to the machine body. Here, the turning direction of the first transfer cylinder 20 with respect to the machine body is a direction of turning around the axis of the vertical portion at the rear of the machine body of the first transfer cylinder 20. Specifically, as shown in FIG. 7, the first transport cylinder 20 turns with respect to the machine body. The turning drive device 50 includes an electric motor (not shown) and a hydraulic cylinder 51. The electric motor turns the vertical cover 24 around the axis of the vertical part with respect to the machine body, whereby the bending part cover 23 and the second transport cylinder 30 turn horizontally with respect to the machine body. The hydraulic cylinder 51 connects the hydraulic cylinder action shaft 21 of the bending portion cover 23 and a vertical portion cover 24 described later. The hydraulic cylinder 51 moves the bending portion cover 23 up and down with respect to the vertical portion cover 24. Thereby, the hydraulic cylinder 51 raises and lowers the second transport cylinder 30 with respect to the machine body. The hydraulic cylinder 51 is controlled to be driven and stopped based on a control signal from the control device 100. The turning drive device 50 includes a turning angle sensor 50s (see FIG. 5) for detecting a turning angle in the horizontal direction with respect to the body of the first transport cylinder 20 and a lift sensor for detecting an elevation position of the first transport cylinder 20 with respect to the body. (Not shown).

  The turning angle sensor 50s detects the turning angle of the first transport cylinder 20 with respect to the body and outputs the detected turning angle to the control device 100 as a control signal. As shown in FIG. 7, the turning angle is an angle at which the first transport cylinder 20 is turned around the axis of the vertical portion at the rear of the machine body.

  The lift sensor detects the lift position of the second transport cylinder 30 relative to the machine body and outputs it to the control device 100 as a control signal.

  As shown in FIG. 1, the blower 60 is for conveying the grains stored in the Glen tank 7 by wind power via the first conveyance cylinder 20 and the second conveyance cylinder 30. The blower 60 sucks outside air as the rotating body rotates, and blows out air from a blower opening (not shown). The air ejected from the blower port passes through the blower cylinder 61 and flows into the inlet side of the first transport cylinder 20. By the air blown out from the blower 60, the grains are conveyed through the first conveyance cylinder 20 and the second conveyance cylinder 30 and conveyed to the outlet side (discharge device 70 side).

  As shown in FIG. 1, the discharge device 70 is disposed at the other end 31 b of the outer cylinder 31 of the second transport cylinder 30. The discharge device 70 has a discharge port 71 that opens in a direction different from the axial direction of the second transport cylinder 30 and is formed by processing a steel plate that is a conductive material. The discharge port 71 has an opening formed downward, and the grain conveyed to the discharge port 71 falls downward. In this way, the discharge device 70 discharges the grain to a discharge destination such as a loading platform of a truck stopped nearby. The discharge port 71 of the discharge device 70 is connected to the other end portion 31b of the outer cylinder 31 of the second transfer cylinder 30 in a state of being in close contact with the peripheral surface without any gap.

  As shown in FIG. 5, the operation panel switch 80 is provided with a switch for performing an operation related to grain discharge. Mainly, an automatic extension switch 81, an automatic storage switch 82, a manual lift switch 83, a manual switch Switches including a down switch 84, a manual right turn switch 85, a manual left turn switch 86, a manual extension switch 87, and a manual shortening switch 88 are provided. The operation panel switch 80 outputs ON / OFF of each switch to the control device 100 as a control signal.

  Further, the operation panel switch 80 is provided with a switch for performing an operation related to the grain discharge, and mainly includes a discharge switch 89 and a switch including a stop switch 90. The operation panel switch 80 transmits ON / OFF of the switch to the control device 100 as a control signal.

  The discharge switch 89 is a switch that starts discharging grains from the combine 1. When the discharge switch 89 is turned “ON (discharge)” by the operator, the discharge switch 89 transmits a control signal to that effect to the control device 100. Then, the feeding device 62 and the blower device 60 are driven by the control device 100. In this way, when the discharge switch 89 is set to “ON (discharge)”, discharge of the grains from the glen tank 7 is started.

  The stop switch 90 is a switch for stopping the discharge of the grain from the combine 1. The stop switch 90 transmits a control signal to that effect to the control device 100 when turned on (stopped) by the operator. Then, after the feeding device 62 is stopped by the control device 100, the blower device 60 is stopped. In this way, when the stop switch 90 is set to “ON (stop)”, the grain discharge from the glen tank 7 is stopped.

  The automatic extension switch 81 extends the outer cylinder 31 to the advance position with respect to the inner cylinder 32 to extend the length of the second transfer cylinder 30, and moves the first transfer cylinder 20 to the swivel extension position on the fuselage. This is a switch for automatically turning the first transport cylinder 20 and the second transport cylinder 30 to the overhanging state. The automatic extension switch 81 outputs a control signal to that effect to the control device 100 when the operator performs an input operation (pressing down). Then, the telescopic drive device 40 and the turning drive device 50 are driven by the control device 100.

  The automatic storage switch 82 retracts the outer cylinder 31 to the retracted position with respect to the inner cylinder 32 to shorten the length of the second transport cylinder 30, and swings the first transport cylinder 20 to the swivel storage position on the fuselage. It is a switch for lowering and automatically putting the first transport cylinder 20 and the second transport cylinder 30 into the stowed state. The automatic storage switch 82 outputs a control signal to that effect to the control device 100 when an operator performs an input operation (pressing down). Then, the telescopic drive device 40 and the turning drive device 50 are driven by the control device 100.

  The manual up switch 83 and the manual down switch 84 are switches for driving the turning drive device 50 to raise and lower the first transport cylinder 20.

  The manual right turn switch 85 and the manual left turn switch 86 are switches for driving the turning drive device 50 to turn the first transport cylinder 20 left and right.

  The manual extension switch 87 and the manual shortening switch 88 are switches for driving the extension / contraction drive device 40 to extend / contract the length of the second transport cylinder 30.

  The control device 100 receives a control signal from each switch of the operation panel switch 80 and outputs the control signal to the telescopic drive device 40 and the turning drive device 50. The control device 100 outputs a control signal to the cutting unit lifting motor 4am and the take-up reel lifting motor 4dm of the cutting device 4 based on the operation of the cutting lifting lever 90. In addition, the control device 100 receives control signals from the discharge cylinder position sensor 40s, the turning angle sensor 50s, the elevation sensor, and the like.

  When a control signal based on an input operation (pressing) of the automatic extension switch 81 is input, the control device 100 outputs a control signal to the telescopic drive device 40 and the turning drive device 50. First, the first transport cylinder 20 Is lifted from the machine body and the second transport cylinder 30 is detached from the support member 33, and then the outer cylinder 31 is advanced to the advance position with respect to the inner cylinder 32 to extend the length of the second transport cylinder 30; And the 1st conveyance cylinder 20 is swung to the rotation overhanging position on the body, and the control which makes the 1st conveyance cylinder 20 and the 2nd conveyance cylinder 30 an overhanging state is performed.

  When a control signal based on an input operation (pressing) of the automatic storage switch 82 is input, the control device 100 outputs a control signal to the telescopic drive device 40 and the turning drive device 50, and changes the outer cylinder 31 to the inner cylinder 32. On the other hand, the length of the second transfer cylinder 30 is reduced by retreating to the retracted position, and the first transfer cylinder 20 and the second transfer cylinder 20 are swung and lowered to the swivel storage position on the fuselage. Control is performed so that 30 is stored.

  When a control signal based on an input operation (pressing) of the manual ascent switch 83 is input, the control device 100 outputs a control signal to the turning drive device 50 and performs control to raise the first transport cylinder 20. In addition, when a control signal based on the turning-off operation of the manual ascent switch 83 is input, the control device 100 outputs a control signal for stopping the turning drive device 50.

  When the control signal based on the input operation (pressing) of the manual lowering switch 84 is input, the control device 100 outputs the control signal to the turning drive device 50 and controls the lowering of the first transport cylinder 20 in FIG. Performed along the flow shown (manual descent process). Moreover, the control apparatus 100 will output the control signal which stops the turning drive apparatus 50, if the control signal based on the turning-off operation of the manual lowering switch 84 is input.

  In the manual lowering process, when the first transport cylinder 20 is located at the swivel storage position and the outer cylinder 31 is advanced with respect to the inner cylinder 32 from the retracted position, the first transport cylinder by the swivel driving device 50 is used. This is a process for restricting the control of lowering 20 relative to the airframe. In the manual lowering process, the control device 100 waits for an “ON” operation of the manual lowering switch 84 (step S11). Specifically, the control device 100 waits for an input of a control signal based on an input operation (pressing) of the manual lowering switch 84. If the control device 100 determines that the manual lowering switch 84 is not turned on (in the case of “No”), the control device 100 continues to stand by in step S11. When it is determined that the manual lowering switch 84 has been turned on (when “Yes”), the control device 100 proceeds to step S12.

  And the control apparatus 100 determines whether the 1st conveyance cylinder 20 is a rotation accommodation angle (a rotation accommodation position) (step S12). Specifically, the control device 100 determines whether or not the first transport cylinder 20 is at the turning storage angle (the turning storage position) based on the control signal from the turning angle sensor 50s. When it is determined that the turning storage angle (the turning storage position) has been reached (in the case of “Yes”), the control device 100 proceeds to step S13. If the control device 100 determines that it is not the turning storage angle (the turning storage position) (in the case of “No”), it proceeds to step S14.

  And the control apparatus 100 determines whether the 2nd conveyance cylinder 30 is the shortest (step S13). Specifically, the control device 100 determines whether or not the length of the second transport cylinder 30 is the shortest based on a control signal from the discharge cylinder position sensor 40s. When it is determined that the control device 100 is the shortest (in the case of “Yes”), the control device 100 proceeds to step S14. When it is determined that the control device 100 is not the shortest (in the case of “No”), the control device 100 proceeds to step S15.

  Then, the control device 100 outputs a control signal to the turning drive device 50 based on the input operation (pressing) of the manual lowering switch 84 to lower the first transport cylinder 20 (step S14). Then, the control device 100 ends the information processing in the manual lowering process.

  Moreover, the control apparatus 100 outputs a warning (step S15). Specifically, the alarm is notified by outputting sound from an alarm output device including a speaker disposed in the vicinity of the operation panel switch 80, or an alarm display including a monitor disposed in the vicinity of the operation panel switch 80. Outputs characters to the device and notifies them.

  And the control apparatus 100 waits for cancellation | release of an alarm (step S16). Specifically, the control device 100 waits until an alarm is confirmed by the operator and an input to continue the lowering operation of the first transport cylinder 20 is input. When it is determined that there is no input (in the case of “No”), the control device 100 continues standby in step S16. When it is determined that there is an input (in the case of “Yes”), the control device 100 proceeds to step S14.

  In addition, the control device 100 is implemented with the following processing performed based on a control signal from the discharge switch 89 as a part of its function. When the control device 100 detects that the discharge switch 89 is set to “ON (discharge)”, the control device 100 transmits a control signal for driving the feeding device 62 and a control signal for driving the blower device 60. Send. In this way, the grain in the Glen tank 7 is transported by the wind force through the first transport cylinder 20 and the second transport cylinder 30 by the control signal from the control device 100 and discharged from the discharge device 70 to the outside.

  Further, the control device 100 is implemented with the following processing performed based on the control signal from the stop switch 90 as part of its function. When the control device 100 detects the “ON (stop)” signal from the stop switch 90, the control device 100 transmits a control signal for stopping the feeding device 62 and then transmits a control signal for stopping the blowing device 60. In this manner, the grain discharge from the grain tank 7 is stopped by the control signal from the control device 100.

  Next, the operation | movement at the time of the grain conveyance of the combine 1 comprised in this way is demonstrated with reference to drawings.

  The grain separated in the threshing device 5 is stored in the Glen tank 7. When the operator confirms the display panel of the cab 6 and finds that the grain stored in the Glen tank 7 is full or exceeds a predetermined amount, the combine 1 is stopped and the truck is stopped nearby. .

  Then, the operator operates the operation panel switch 80 so as to adjust the projecting direction and length of the second transport cylinder 30 in accordance with the truck bed. When the control device 100 detects a control signal for adjusting the extension direction from the operation panel switch 80, the control device 100 transmits a control signal for setting the extension direction to a predetermined angle to the rotation driving device of the second transport cylinder 30. In this way, the extending direction of the second transport cylinder 30 is adjusted. When the control device 100 detects a control signal for adjusting the length from the operation panel switch 80, the control device 100 pulls the outer cylinder 31 forward in the front-rear direction with respect to the telescopic drive device of the second transport cylinder 30 to a predetermined length. A control signal is transmitted. In this way, the discharge port 71 of the discharge device 70 of the combine 1 is positioned above the truck bed.

  Then, the operator presses the discharge switch 89 of the operation panel switch 80. When the control device 100 detects an “ON (discharge)” signal from the discharge switch 89, the control device 100 transmits a control signal for driving the feeding device 62 and a control signal for driving the blower 60. Thus, the combine 1 conveys the grain in the Glen tank 7 by the wind force through the first transport cylinder 20 and the second transport cylinder 30 and discharges the grain from the discharge device 70 to the outside.

  Here, the speed of the conveying wind and the flow rate of the grains when the grain is conveyed through the first conveying cylinder 20, the inner cylinder 32 of the second conveying cylinder 30, and the outer cylinder 31 will be described. The inner diameter d1 of the first transfer cylinder 20 and the inner diameter d1 of the outer cylinder 31 are the same, and the inner diameter d2 of the inner cylinder 32 is set slightly smaller than d1. Since the inner diameter d <b> 2 is smaller than d <b> 1, the speed of the conveying wind and the grain flow velocity in the inner cylinder 32 are faster than the velocity of the conveying wind and the grain flow speed in the first conveying cylinder 20. Further, since the inner diameter d1 is larger than d2, the wind speed of the conveying wind and the flow velocity of the grain in the outer cylinder 31 are slower than the wind speed of the conveying wind and the grain flow velocity in the inner cylinder 32, and the first conveying cylinder. 20 is equivalent to the wind speed of the conveying wind and the flow speed of the grain.

  When the operator confirms the display panel of the cab 6 and finds that the grains stored in the Glen tank 7 have disappeared (the discharge has been completed), the operator presses the stop switch 90 of the operation panel switch 80. When the control device 100 detects an “ON (stop)” signal from the stop switch 90, the control device 100 transmits a control signal for stopping the feeding device 62 and outputs a control signal for stopping the blower device 60 after the first predetermined time has elapsed. Send. In this way, the grain discharge from the Glen tank 7 is stopped.

  In this way, until the desired range of mowing work is completed, the harvesting device 4 harvests the culm while traveling on the combine 1, threshing by the threshing device 5, and discharging the grain from the discharging device 70 to the truck. Is repeated.

  Next, the operation | movement at the time of automatic extension of the 1st conveyance cylinder 20 and the 2nd conveyance cylinder 30 of the combine 1 is demonstrated with reference to FIG.

  For example, when the operator moves the combine 1 to the grain discharge place in the field, the operator operates the automatic extension switch 81 of the operation panel switch 80 of the cab 6 to thereby perform the first conveyance cylinder 20 and the second conveyance. The tube 30 is automatically extended.

  When a control signal based on an on-operation (pressing) of the automatic extension switch 81 is input, the control device 100 outputs a control signal to the telescopic drive device 40 and the turning drive device 50, and the outer cylinder 31 is moved to the inner cylinder 32. The first transport cylinder 20 and the second transport cylinder are moved to the advanced position by extending the length of the second transport cylinder 30 and the first transport cylinder 20 is swung to the swiveling overhanging position on the fuselage. The control which makes 30 the overhanging state is performed. At this time, since the second transport cylinder 30 is swung together with the first transport cylinder 20, it is detached from the support member 33.

  When the combine 1 arrives at the discharge place, the operator aligns the first transfer cylinder 20 and the second transfer cylinder 30 with, for example, the position of the discharge destination such as a loading platform of a truck parked nearby, and the second transfer cylinder 30. Is extended from the swiveling overhang position, or the first transport cylinder 20 is swung from the swiveling overhanging position.

  Next, operations during automatic storage of the first transport cylinder 20 and the second transport cylinder 30 of the combine 1 will be described with reference to the drawings.

  For example, when it is assumed that the worker travels through the field and passes through the basket, the operator operates the automatic storage switch 82 of the operation panel switch 80 of the cab 6 to thereby perform the first conveyance cylinder 20 and the second conveyance. The cylinder 30 is automatically stored.

  When a control signal based on an input operation (pressing) of the automatic storage switch 82 is input, the control device 100 outputs a control signal to the telescopic drive device 40 and the turning drive device 50, and changes the outer cylinder 31 to the inner cylinder 32. On the other hand, the length of the second transfer cylinder 30 is reduced by retreating to the retracted position, and the first transfer cylinder 20 and the second transfer cylinder 20 are swung and lowered to the swivel storage position on the fuselage. Control is performed so that 30 is stored.

  At this time, the second transport cylinder 30 is supported from below by the support member 33. A reinforcing member 31 </ b> A is disposed at a contact position of the second transport cylinder 30 with the support member 33. For this reason, the combine 1 is reinforced even when the body greatly vibrates up and down when it travels through the field and passes through the basket and the support member 33 on the body and the second transport cylinder 30 of the transport cylinder come into contact with each other. Deformation is suppressed by the member 31A.

  As described above, in the grain discharging apparatus according to the first embodiment, the grain discharging apparatus includes the first conveying cylinder 20 and the second conveying cylinder 30 that expands and contracts, and therefore the second conveying cylinder 30 is expanded and contracted. Thus, the length of the grain discharging device can be adjusted to a desired length. In this way, by extending and contracting the second transport cylinder 30, the grain can be discharged more easily regardless of the positional relationship with the loading platform or container of the truck as the discharge destination.

  Since the one end 30a of the second transport cylinder 30 is inserted and connected to the other end 20b of the first transport cylinder 20, even when the second transport cylinder 30 is expanded or contracted, the first transport cylinder 20 There is no friction. Further, the inner diameter d1 of the first conveying cylinder 20 and the inner diameter d1 of the outer cylinder 31 of the second conveying cylinder 30 are the same, and the internal pressure (the air blower 60 blows air) in the first conveying cylinder 20 and the second conveying cylinder 30. Air pressure) does not decrease. Thereby, since the grain discharge device does not reduce the wind speed of the conveying wind and the flow velocity of the grain in the first conveying cylinder 20 and the second conveying cylinder 30 when the grain is conveyed by the conveying wind, the grain is discharged by sufficient wind power. This prevents the clogging of the grains and allows the grains to be discharged smoothly.

  Further, since the inner diameter d2 of the inner cylinder 32 of the second conveying cylinder 30 is made smaller than the inner diameter d1 of the first conveying cylinder 20 and the outer cylinder 31, the speed of the conveying wind and the grain flow velocity in the inner cylinder 32 are increased. Thus, the stagnation and clogging of the grain in the inner cylinder 32 which is an intermediate part of the conveyance path and is likely to cause stagnation of the grain can be prevented.

  Further, since the inner diameter d1 of the outer cylinder 31 is equal to the inner diameter d1 of the first conveying cylinder 20 and smaller than the inner diameter d2 of the inner cylinder 32, the wind speed of the conveying air in the outer cylinder 31 is the inner cylinder 32. It becomes smaller than the wind speed at. Therefore, the grain is prevented from being sent out at high speed from the other end portion 31 b of the outer cylinder 31 toward the discharge device 70, and the grain collides with the inner wall of the discharge device 70 and is damaged. It is possible to prevent the working environment from deteriorating due to a large amount of dust rising from the discharge port 71.

  Further, the inner diameter d1 of the first conveying cylinder 20 and the inner diameter d1 of the outer cylinder 31 of the second conveying cylinder 30 are the same as those of a conventional combine discharge auger, and it is not necessary to increase the size of the discharge cylinder. It is possible to reduce the weight.

  Further, the support member 22 supports the curved portion 21 of the first transfer cylinder 20 from below, and the first transfer cylinder 20 is held in a horizontal state from the contact position with the support member 22 to the other end 20b. . This prevents the other end 20b of the first transfer cylinder 20 from being twisted with respect to the one end 30a of the second transfer cylinder 30 regardless of the extending direction of the second transfer cylinder 30. 20 can be prevented from being bent or bent. For this reason, the wind force from the air blower 60 can be supplied stably. Moreover, the rigidity of the bending portion 21 can be increased by supporting the bending portion 21 of the first transport cylinder 20 from below by the support member 22.

  Further, when the stop switch 90 is pressed, the blower device 60 is stopped after the feeding device 62 is stopped. For this reason, even if the grain in the middle of conveyance remains in the 1st conveyance cylinder 20 or the 2nd conveyance cylinder 30 at the timing when the stop switch 90 was pushed, the blow-off of air from the air blower 60 is continued. Thus, the remaining grain can also be discharged from the discharge device 70.

  The support member 33 is disposed on the machine body 1 and supports the outer cylinder 31 from below in the storage state of the first transfer cylinder 20 and the second transfer cylinder 30. Further, the reinforcing member 31 </ b> A is disposed at a position where the reinforcing member 31 </ b> A contacts the support member 33 in the stored state on the outer periphery of the outer cylinder 31. Accordingly, in the grain discharging apparatus, the outer cylinder 31 is supported from below by the support member 33 when the first conveyance cylinder 20 and the second conveyance cylinder 30 are stored, and the support member is disposed on the outer periphery of the outer cylinder 31. A reinforcing member 31 </ b> A is disposed and reinforced at a position in contact with 33. For this reason, in this state, for example, when the combine 1 travels through the field and passes through the basket, the machine body greatly vibrates up and down, and the support member 33 on the machine body and the second transfer cylinder 30 of the transfer cylinder contact each other. Even if it did, since the 2nd conveyance cylinder 30 is reinforced by 31 A of reinforcement members, a deformation | transformation is suppressed. Thus, the combine 1 can suppress the damage of the 2nd conveyance cylinder 30 in the accommodation state of the 1st conveyance cylinder 20 and the 2nd conveyance cylinder 30. FIG.

  Thus, when it is assumed that the combine 1 travels through the field and passes through the straw, the operator turns on (presses) the automatic storage switch 82 to perform the first transport cylinder 20 and the second transport. The cylinder 30 may be placed in the automatic storage state. When the operator turns on (presses) the automatic storage switch 82, the control device 100 controls the telescopic drive device 40 to retract the outer cylinder 31 to the retracted position with respect to the inner cylinder 32, so that the second transfer cylinder 30 is moved. The length is shortened, and the turning drive device 50 is controlled to turn the first transport cylinder 20 to the swivel storage position on the machine body and bring the first transport cylinder 20 and the second transport cylinder 30 into the storage state. . That is, the operator only has to use the automatic storage switch 82 in order to place the first transfer cylinder 20 and the second transfer cylinder 30 in the storage state, and needs to manually operate the telescopic drive device 40 and the turning drive device 50. There is no. For this reason, the operator can make the 1st conveyance cylinder 20 and the 2nd conveyance cylinder 30 into an automatic accommodation state easily and reliably.

  Moreover, since the grain discharging apparatus which concerns on Embodiment 1 can suppress the damage of the 2nd conveyance cylinder 30 and can suppress a deformation | transformation, avoiding that operation | movement is prevented at the time of the expansion / contraction of the 2nd conveyance cylinder 30. Can do.

  Further, in the grain discharging apparatus according to the first embodiment, when the automatic extension switch 81 is turned on (pressed), the outer cylinder 31 is advanced to the advanced position with respect to the inner cylinder 32 and the second conveying cylinder 30 is moved. The length can be extended, and the first transfer cylinder 20 and the second transfer cylinder 30 can be brought into an extended state by turning the first transfer cylinder 20 to the turning extension position on the machine body. For this reason, when moving the combine 1 to the grain discharge location in the field, the operator turns on (presses) the automatic extension switch 81 to extend the first conveyance cylinder 20 and the second conveyance cylinder 30. Just keep it in a state. When the combine 1 arrives at the discharge location, the first transfer cylinder 20 and the second transfer cylinder 30 are swung over the second transfer cylinder 30 with the discharge destination such as the loading platform of the truck stopped nearby. It is possible to extend from the position or to turn the first transport cylinder 20 from the turning overhang position. At this time, since the length of the second transport cylinder 30 is in the extended state, the time required for further extending the second transport cylinder 30 is extended from the state in which the length of the second transport cylinder 30 is the shortest. It is possible to shorten the time required for the operation. Further, the time required for contracting the second transport cylinder 30 can be shortened compared to the time required for shortening the length of the second transport cylinder 30 from the maximum length.

Further, in the grain discharging device according to the first embodiment, when the manual lowering switch 84 is turned on (pressed), the control device 100 executes a manual lowering process. That is, the control device 100 performs the first conveyance by the swivel driving device 50 when the first conveyance cylinder 20 is located at the revolving storage position and the outer cylinder 31 is advanced with respect to the inner cylinder 32 from the retracted position. Control to lower the cylinder 20 relative to the airframe can be restricted. Thereby, the grain discharging apparatus can avoid that the 2nd conveyance cylinder 30 contacts the support member 33, and is damaged.
[Embodiment 2]
Next, with reference to FIG. 9, the grain discharging apparatus which concerns on Embodiment 2 is demonstrated. The combine 1 according to the second embodiment differs from the combine 1 according to the first embodiment in that the taper 35 is formed on the inner peripheral surface of the one end portion 32a of the inner cylinder 32 of the second transport cylinder 30. Are denoted by the same reference numerals and description thereof is omitted.

  The taper 35 is processed so that the inner diameter of the inner peripheral surface of the one end portion 32a of the inner cylinder 32 of the second conveyance cylinder 30 gradually increases toward the distal end side (left direction in FIG. 9). Thereby, the level | step difference between the one end part 32a of the inner cylinder 32 and the 1st conveyance cylinder 20 becomes small, and the difference of the internal diameter d1 of the 1st conveyance cylinder 20 and the internal diameter d2 of the inner cylinder 32 changes continuously.

As described above, according to the grain discharging apparatus according to the second embodiment, the step between the one end portion 32a of the inner cylinder 32 of the second conveyance cylinder 30 and the first conveyance cylinder 20 is reduced, and the first conveyance cylinder 20 is reduced. The difference between the inner diameter d1 of the inner cylinder 32 and the inner diameter d2 of the inner cylinder 32 changes continuously. For this reason, it can reduce that the grain conveyed is damaged by the level | step difference in the connection part of the 1st conveyance cylinder 20 and the inner side cylinder 32. FIG. Moreover, since the level | step difference in the 1st conveyance cylinder 20 and the 2nd conveyance cylinder 30 which are the flow paths of the air ventilated from the air blower 60 is reduced, the pressure loss of air is reduced.
[Embodiment 3]
Next, with reference to FIG. 10, the grain discharging apparatus which concerns on Embodiment 3 is demonstrated. Since the combine 1 which concerns on Embodiment 3 differs in the point from which the grain discharge apparatus which concerns on Embodiment 1 and Embodiment 2 and the taper 36 are comprised with the elastic body, the same code | symbol is attached | subjected to the same part. Description is omitted.

  The taper 36 is composed of a ring-shaped elastic body, and is disposed at one end 32 a of the inner cylinder 32. The outer peripheral surface of the taper 36 is disposed in close contact with the inner peripheral surface of the other end 20 b of the first transport cylinder 20. The taper 36 is machined so that its inner diameter gradually increases toward the tip side (left direction in FIG. 10).

  As described above, according to the grain discharging apparatus according to the third embodiment, the taper 36 is formed of an elastic body that is a separate member from the inner cylinder 32, and the inner peripheral surface of the one end 32 a of the inner cylinder 32 is tapered. Since it is not necessary to process it, it is easy to process.

  In addition, the grain discharge apparatus which concerns on Embodiment 1 to Embodiment 3 of this invention mentioned above is not limited to Embodiment 1 to 3 mentioned above, A various change is possible in the range described in the claim. is there.

7 Grain storage device 20 1st conveyance cylinder 20b The other end part (tip part)
22 Support member (first support member)
30 Second conveying cylinder 31 Outer cylinder 31A Reinforcing member 32 Inner cylinder 32a One end (base end)
33 Support member (second support member)
35 Taper 40 Telescopic drive device 44 Cover 44a Flange portion 44b Fixing tool 61 Blower device 62 Feeding device 90 Stop switch

Claims (6)

The 1st conveyance cylinder (20) connected to the air blower (61) for grain conveyance, and the telescopic 2nd conveyance cylinder (30) connected to the front-end | tip part (20b) of this 1st conveyance cylinder (20) ) A grain discharging apparatus comprising:
The second transfer cylinder (30) includes an inner cylinder (32) connected to the tip (20b) of the first transfer cylinder (20), and an outer periphery of the inner cylinder (32) that is movable in the expansion / contraction direction. A fitted outer cylinder (31);
Inserting and fixing the base end (32a) of the inner cylinder (32) into the tip (20b) of the first transport cylinder (20),
The grain discharging apparatus according to claim 1, wherein an inner diameter of the inner cylinder (32) is set smaller than an inner diameter of the first conveying cylinder (20) and an inner diameter of the outer cylinder (31).   The grain of Claim 1 which formed the taper (35) which reduces the level | step difference with the internal peripheral surface of a 1st conveyance cylinder (20) in the internal peripheral surface of the base end part (32a) in the said inner cylinder (32). Grain discharge device.   The grain discharging apparatus according to claim 2, further comprising a first support member (22) for bending the upper portion of the first transport cylinder (20) and supporting the curved portion from below.   At the lower part of the grain storage device (7), there is provided a feeding device (62) that feeds the grains in the grain storage device (7) to the first transport cylinder (20) side, and stops the discharge of the kernel. The grain discharging apparatus according to claim 3, wherein when the stop switch (90) is operated, the blower (61) stops after the feeding device (62) stops.   A second support member (33) for supporting the second transport cylinder (30) in the storage position is provided, and the second transport cylinder (30) is disposed on the outer periphery of the outer cylinder (31) of the second transport cylinder (30). The grain discharging apparatus according to claim 4, further comprising a reinforcing member (31A) that comes into contact with the second support member (33) when the first support member (33) is supported by shortening the length of the second support member (33).   An expansion / contraction driving device (40) for extending / contracting the second transport cylinder (30) is disposed at a base end portion (32a) of the inner cylinder (32), and the base of the cover (44) of the expansion / contraction driving device (40). The grain discharging apparatus according to claim 5, wherein the flange portion (44a) is fixed to the base end portion (32a) of the inner cylinder (32) via a fixture (44b).

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