JP2891249B2 - Grain discharging device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain discharging device provided in a combine grain storage device or the like.

[0002]

2. Description of the Related Art Conventionally, for example, in a grain storage section of a combine, a grain discharge device comprising a vertically movable and swivelable grain discharge cylinder is provided in order to be able to appropriately discharge temporarily stored grains. Have. And, for example, the grains harvested in the combine operation and temporarily stored in the grain storage unit,
At the appropriate time, it is discharged to the carrier or the like of the transport vehicle by the grain discharging device.

[0003] In this grain discharging operation, first, the grain discharging cylinder is moved up and down and swiveled to move the discharge port at the front end to a position above a carrier of a carrier, and thereafter, the interior of the grain discharging cylinder is mounted on the grain discharging cylinder. The spiral is driven and rotated to discharge grains. In such a grain discharging operation, in order to make it possible to more freely adjust the grain discharging position, in addition to raising and lowering and turning the grain discharging cylinder, a technique is conceivable in which the grain discharging cylinder is configured to be adjustable in expansion and contraction. Has been issued. The grain discharge cylinder configured to be adjustable in expansion and contraction as described above is provided with a spiral body for grain conveyance rotatably mounted therein, and is divided into an inner cylinder on the base side and an outer cylinder having a discharge port, The outer cylinder is fitted to the outside of the inner cylinder so as to be slidable in the longitudinal direction, and the expansion and contraction is adjusted by sliding the outer cylinder by a driving device such as a hydraulic cylinder or a motor.

[0004] The spiral body for conveying the grain provided in the above-mentioned grain discharge cylinder is a spring-type spiral body which can expand and contract by elastic deformation so as to be able to expand and contract according to the expansion and contraction state of the grain discharge cylinder. It is configured into a spiral whose length can be adjusted by doubly polymerizing, and also a spiral built in the inner cylinder on the base side, a spiral built in the outer cylinder on the outlet side,
Its outer diameter was the same.

For example, Japanese Utility Model Laid-Open Publication No. 1-121340 and Japanese Utility Model Laid-Open Publication No. 2-120135 disclose a kernel discharging cylinder in which a spiral body for transporting a kernel is rotatably mounted. The inner cylinder and the outer cylinder on the discharge port side are configured separately, and the outer cylinder is attached to the outside of the inner cylinder so as to be movable in the longitudinal direction. There is disclosed a grain discharging device in which the outer diameter of a spiral body provided in the inner cylinder is the same as that of the spiral body.

[0006]

As described above, the grain discharge cylinder in which the spiral body for grain conveyance is rotatably mounted is divided into an inner cylinder on the base side and an outer cylinder on the discharge port side. An outer cylinder is fitted outside the inner cylinder and slidably mounted in the longitudinal direction,
It is publicly known that the grain discharge cylinder is configured to be adjustable in expansion and contraction.

[0007] However, the spiral body contained in the grain discharge cylinder has the same outer diameter as the spiral body contained in the outer cylinder and the spiral body contained in the inner cylinder. However, in general, when configuring a grain conveying device by rotatably housing a spiral body in a cylindrical body, a gap between the inner peripheral surface of the cylindrical body and the outer peripheral edge of the spiral body built in the cylindrical body is required. The intervals must be set so that the grains are not damaged while the grains are transported without leaking.

On the other hand, when the outer cylinder is fitted to the outside of the inner cylinder so as to be freely movable in the longitudinal direction, the inner diameter of the outer cylinder is inevitably set to the inner diameter due to the thickness of the inner cylinder and tolerances in the fitting configuration. It is configured to be larger than the inner diameter of the cylinder. Therefore, as in the prior art,
When the helical body provided in the outer cylinder and the helical body provided in the inner cylinder have the same outer diameter, the inner peripheral surface of the fixed inner cylinder and the outer peripheral edge of the helical body provided in the inner cylinder are formed. The gap is constant irrespective of the state of expansion and contraction of the grain discharge cylinder, but the gap between the inner peripheral surface of the outer cylinder on the moving side and the outer peripheral edge of the spiral body provided inside the outer cylinder is a grain discharge cylinder. When this is extended, a large gap is formed.

As a result, when the grain discharging cylinder is extended and the spiral body is driven and rotated in this state to perform the grain discharging operation,
There has been a problem that the transporting function of the grains inside the outer cylinder is impaired to cause clogging, and the grains being transported are damaged.

[0010]

The present invention uses the following technical means in order to solve the above-mentioned problems. That is, the grain discharge tube 2 that rotatably houses the spiral body 1 for conveying the kernel is divided into an inner tube 13 on the base side and an outer tube 15 on the discharge port 14 side, and the inner tube 1
An outer cylinder 15 is attached to the outside of the outer cylinder 3 so as to be movable in the longitudinal direction.
The grain discharging device is characterized in that the outer diameter of b is larger than the outer diameter of the spiral body 1a provided in the inner cylinder 13.

Thus, in the grain discharging operation by the grain discharging device of the present invention, the kernel 1 for conveying the kernel contained in the grain discharging cylinder 2, that is, the spiral 1 a contained in the inner cylinder 13 is used. The grains are discharged from the discharge port 14 by driving and rotating the spiral body 1b provided in the outer cylinder 15. When adjusting the grain discharge position, the outer cylinder 15 on the discharge port 14 side is moved in the longitudinal direction with respect to the inner cylinder 13 on the base side to adjust the expansion and contraction of the grain discharge cylinder 2.

At this time, when the outer cylinder 15 is moved to extend the grain discharge cylinder 2, the outer cylinder 15 moves in a direction to escape from the outside of the inner cylinder 13. It can be seen that the gap between the inner peripheral surface of the grain discharge cylinder 2 and the outer peripheral edge of the spiral 1 is enlarged. However, the outer diameter of the spiral body 1b provided inside the outer cylinder 15 is
3 is larger than the outer diameter of the spiral body 1a contained in the outer cylinder 15, so that the inner peripheral surface of the outer cylinder 15 and the spiral body 1b contained in the outer cylinder 15 even when the grain discharge cylinder 2 is extended. The gap with the outer peripheral edge is maintained in an appropriate state.

[0013]

As described above, according to the present invention, even when the grain discharging operation is performed in a state where the grain discharging cylinder 2 is extended, the grain conveying operation inside the outer cylinder 15 is not impaired. Grains can be discharged smoothly, and defects that damage the grains during transportation can be reduced.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described by taking a combine as an example. The combine 4 is a conventionally known one that includes an endless belt traveling device 5, a control unit 6, a reaper 7, a threshing device 8, and a grain storage device 9. The grain storage device 9 is provided with a grain discharge device 10. The grain discharging device 10 has a vertical shaft center and is rotatable by a motor (not shown), and a horizontal shaft center is provided at an upper end of the kernel 11. And a grain discharge cylinder 2 which is a horizontal feed portion rotatable by a cylinder 12 by being connected to the cylinder 12. The motor and cylinder 12 are operated by a control device of the control unit 6 and a manual lever switch. Then, a rotating shaft having a spiral body 1 is mounted on the inside of the kernel 11 and the kernel 2 of the kernel discharge device 10.
The rotating shaft of the kernel 11 is interlockingly rotated from a spiral axis at the bottom of the grain storage device 9, and the axis of rotation of the kernel 2 is interlockingly rotated from the rotating shaft of the kernel 11. is there.

Thus, the grain discharge cylinder 2 is divided into a main discharge cylinder (inner cylinder) 13 on the base side and a sub-discharge cylinder (outer cylinder) 15 having a discharge port 14 at the tip end. Discharge cylinder 13
Is slidably fitted on the inner periphery of the sub-discharge cylinder 15. The main shaft 16 inside the main discharge cylinder 13 is a hollow pipe, and the spiral body 1 (1a) is wound around the outer peripheral surface, and a spiral groove 17 having a predetermined length is formed on the inner peripheral surface. The tip of the main shaft 16 is supported by a bush 18. A sub shaft 19 is provided in the sub discharge tube 15. A protrusion 20 is provided at the base end of the sub shaft 19, and the sub shaft 19 is inserted into the main shaft 16 so that the protrusion 20 engages with the spiral groove 17 on the inner peripheral surface of the main shaft 16. Accordingly, when the sub-shaft 19 rotates relatively to the main shaft 16, the protrusion 20 is guided by the spiral groove 17, and the base side of the sub-shaft 19 moves in and out of the main shaft 16. become. That is, the length from the base of the main shaft 16 to the tip of the sub shaft 19 expands and contracts. Then, the spiral body 1 is wound around the outer peripheral portion of the sub shaft 19 at an appropriate distance from the sub shaft 19. The tip of the spiral body 1 (1b) is fixed to a portion of the outer peripheral surface of the counter shaft 19 which is located near the discharge port 14. The rear end of the spiral 1 (1b) is fixed to the outer peripheral surface of the front end of the main shaft 16. The helical body 1 (1b) is formed of an elastically deformable material, and is supported only by the tip of the main shaft 16 and the vicinity of the tip of the sub shaft 19. The tip 21 of the sub shaft 19 is supported by bearings in a state protruding from the tip of the sub discharge cylinder 15. The tip 21 is a spline shaft, and the spline is
Are provided slidably in the axial direction, and a shifter 23 for sliding the disk 22 is provided. A push-pull wire 24 operable from the control unit 6 is connected to the shifter 23.
Further, the periphery of the distal end portion 21 is configured to be covered by a case 25, and the disk 2 is disposed inside the case 25.
A brake disk 26 is fixed to the opposite side of the disk 2. This configuration is the expansion / contraction device 3.

With the above arrangement, while the main shaft 16 is rotating in the grain discharging direction, the disk 22 is moved by the operation of the push-pull wire 24 to the brake disk 26.
Press against As a result, when the sub shaft 19 is braked, the protrusion 20 is guided by the spiral groove 17, and the sub shaft 19 moves in a direction to come off from the main shaft 16.
As a result, the sub-discharge tube 15 moves in a direction to escape from the main discharge tube 13, and as a result, the grain discharge tube 2 is extended. The protrusion 20 is provided in the spiral groove 17.
When the operation of the push-pull wire 24 is stopped when the end portion is reached, the kernel 2 can be maintained in the extended state.
By this operation, the outlet 14 can be moved to a position above the transport vehicle 27 farther from the combine 4.
In order to shorten the grain discharge cylinder 2, the push-pull wire 24 may be operated while the main shaft 16 is reversed.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a grain discharge cylinder in a shortened state according to an embodiment of the present invention.

FIG. 2 is a side sectional view of a grain discharge cylinder in an extended state according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram of a main part in the embodiment of the present invention.

FIG. 4 is a side view of the combine according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram of an operation state according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spiral body 1a Spiral body 1b Spiral body 2 Grain discharge cylinder 13 Inner cylinder 14 Discharge port 15 Outer cylinder

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A01F 12/46

Claims (1)

(57) [Claims] 1. A grain discharge cylinder 2 in which a spiral 1 for conveying grains is rotatably mounted is provided with an inner cylinder 13 on a base side and a discharge port 14.
And the outer cylinder 15 is attached to the outer cylinder 15 so as to be movable in the longitudinal direction outside the inner cylinder 13. A grain discharging device, wherein the outer diameter of the spiral body 1a provided in the inner cylinder 13 is larger than that of the spiral body 1a.