JP7239456B2 - combine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a configuration for discharging grain from a grain tank in a combine having a grain tank for storing grain.

A combine provided with a grain tank is provided with a grain conveying device capable of discharging the grain in the grain tank, as disclosed in Patent Document 1.
In the grain conveying device, a vertical conveying part connected to the lower part of the grain tank and arranged along the vertical direction, a relay conveying part connected to the upper part of the vertical conveying part along the horizontal direction, and a relay conveying A horizontal conveying portion connected to the relay conveying portion so as to be vertically swingable around the central axis of the portion, and a grain discharge port at the end portion of the horizontal conveying portion are provided.
In the grain conveying device, the horizontal conveying section is vertically swung with respect to the relay conveying section by an elevating cylinder, whereby the horizontal conveying section is operated up and down.

JP 2016-106602 A

In the grain conveying apparatus, when the horizontal conveying portion is configured to be vertically operated by the lifting cylinder, the vertical swing position of the horizontal conveying portion ( It is necessary to provide a height sensor that detects the vertical angle).

SUMMARY OF THE INVENTION An object of the present invention is to improve the detection accuracy of the vertical swing position (vertical angle) of a horizontal conveying section by a height sensor in a grain conveying device of a combine.

The combine of the present invention is provided with a grain tank for storing grains and a grain conveying device capable of discharging the grains in the grain tank, and the grain conveying device is connected to the lower part of the grain tank. A vertical conveying unit arranged along the vertical direction, a relay conveying unit connected to the upper part of the vertical conveying unit along the horizontal direction, and the relay conveying unit swingable up and down around a central axis. A horizontal conveying unit connected to the relay conveying unit and a grain discharge port provided at the terminal end of the horizontal conveying unit are provided, and supported by the relay conveying unit so as to be vertically swingable about the central axis. a second elevating member attached across the first elevating member and the horizontal conveying section; and a second elevating member connected to the second elevating member and expanding and contracting to move the horizontal conveying section. An elevating cylinder for elevating operation around the central axis, and a height sensor for detecting the vertical swing position of the horizontal conveying section by detecting the position of the first elevating member are provided. The height sensor is provided with an arm portion capable of swinging by the height sensor, the arm portion is connected to the first elevating member, and the arm portion swings as the first elevating member swings. Thereby, the position of the first elevating member is detected by the height sensor.

According to the present invention, in a grain conveying device provided with a vertical conveying section, a relay conveying section, and a horizontal conveying section, a first elevating member supported by the relay conveying section so as to be swingable around the central axis of the relay conveying section, A second elevating member is attached across the first elevating member and the horizontal conveying section.
The elevating cylinder is connected to the second elevating member, and when the elevating cylinder expands and contracts, the horizontal conveying section is operated to elevate via the second elevating member.

Since the first elevating member and the second elevating member swing up and down integrally with the horizontal conveying section, the vertical swinging of the horizontal conveying section can be controlled by detecting the position of the first elevating member as in the present invention. By installing a height sensor that detects the movement position, it is possible to directly detect the vertical swing position (vertical angle) of the horizontal transport section without increasing the number of parts. , the detection accuracy of the vertical swing position (vertical angle) of the horizontal conveying section by the height sensor can be improved.

According to the present invention, the height sensor detects the position of the first lifting member. Since the first elevating member can swing up and down around the central axis of the intermediate conveying section, the position (vertical angle) of the first elevating member is detected by the height sensor, thereby allowing the horizontal conveying section to swing up and down. The position can be easily detected.

According to the present invention, the swinging motion of the first elevating member is transmitted to the height sensor via the arm portion, and the position (vertical angle) of the first elevating member is detected by the height sensor. Based on the ratio between the length of the member and the length of the arm portion, the rocking motion of the first elevating member is expanded or compressed and transmitted to the height sensor.

According to the present invention, the ratio between the length of the first elevating member and the length of the arm portion is set to an appropriate value instead of transmitting the swinging motion of the first elevating member to the height sensor as it is. As a result, the swinging motion of the first lifting member can be converted into an appropriate range that can be detected by the height sensor without difficulty, and can be transmitted to the height sensor. Detection accuracy can be improved.

In the present invention, the first elevating member is supported by a portion of the relay conveying portion opposite to the lateral conveying portion, and the height sensor is positioned so as to move the lateral conveying member relative to the first elevating member in a plan view. It is preferable that it is arranged at a position on the part side.

According to the present invention, in plan view, the horizontal conveying portion is arranged in one portion of the relay conveying portion, and the first lifting member is arranged in the other portion of the relay conveying portion. Then, it is arranged at a position on the side of the horizontal conveying portion with respect to the first lifting member, and is arranged between the first lifting member and the horizontal conveying portion.
As a result, the height sensor is arranged compactly, and the possibility of contact between the height sensor and other parts of the combine is suppressed, which is advantageous in avoiding damage to the height sensor.

In the present invention, the first elevating member includes a vertical surface portion extending in the vertical direction, an upper surface portion extending in the horizontal direction from an upper portion of the vertical surface portion toward the horizontal conveying portion, and a horizontal conveying portion from a lower portion of the vertical surface portion. and a laterally extending lower surface portion facing the lower surface portion, and the connection portion with the first elevating member at the end portion of the arm portion is formed when viewed from the extending direction of the first elevating member. , is preferably arranged between the upper surface portion and the lower surface portion.

According to the present invention, the first elevating member is formed to have a grooved cross-sectional shape having the vertical surface portion, the upper surface portion, and the lower surface portion, so that the strength of the first elevating member can be improved.
According to the present invention, the connecting portion connected to the first lifting member at the end of the arm portion of the height sensor is positioned between the upper surface portion and the lower surface portion of the first lifting member when viewed from the extending direction of the first lifting member. Since the connecting portion of the arm portion of the height sensor is surrounded by the first elevating member, it is advantageous in avoiding breakage of the arm portion.

In the present invention, the arm portion is biased toward the upper surface portion or the lower surface portion so that the connection portion of the arm portion contacts the upper surface portion or the lower surface portion, and the first lifting member swings. It is preferable that the arm portion swings while the connecting portion of the arm portion slides on the upper surface portion or the lower surface portion along with the movement.

When the connection part of the arm part of the height sensor is connected to the first lifting member, the difference between the position of the height sensor and the position of the first lifting member, the length of the first lifting member and the arm part of the height sensor The trajectory of the connecting portion of the arm portion of the height sensor and the trajectory of the first elevating member may differ from each other due to the difference in the length of the height sensor.

According to the present invention, the arm portion of the height sensor is urged toward the upper surface portion (lower surface portion) of the first elevating member, and the connection portion of the arm portion of the height sensor is the upper surface portion of the first elevating member. part (lower part).
When the first elevating member swings in this state, the arm portion of the height sensor swings so as to follow the first elevating member. By sliding along the upper surface (lower surface), the difference between the trajectory of the connecting portion of the arm of the height sensor and the trajectory of the first elevating member is absorbed.

According to the present invention, while the difference between the trajectory of the connecting portion of the arm portion of the height sensor and the trajectory of the first lifting member is reasonably absorbed, the first lifting member swings through the arm portion of the height sensor. is transmitted to the height sensor, and the detection accuracy of the height sensor can be improved.

In the present invention, it is preferable that the height sensor is arranged between an upper portion of the relay transport section and the central axis when viewed in the horizontal direction.

According to the present invention, in the grain conveying device, the height sensor is arranged at a relatively high position and does not protrude above the relay conveying section, so that the height sensor does not come into contact with other parts of the combine. This has the advantage of reducing the possibility of damage to the height sensor.

In the present invention, it is preferable that the height sensor is supported by the relay conveying section via a stay.

According to the present invention, the position of the height sensor is stabilized by stably supporting the height sensor on the relay conveying unit via the stay, so that the detection accuracy of the height sensor can be improved.

It is a right view of a combine. It is a top view of a combine. It is a right side view near the relay conveyance part in a grain conveying apparatus. It is a top view near the relay conveyance part in a grain conveying apparatus. It is a front view near the height sensor in the grain conveying device. It is a vertical right view near the height sensor in a grain conveying apparatus. It is a vertical right side view near the light in a grain conveying apparatus. It is a cross-sectional plan view near the light in a grain conveying apparatus. It is the schematic which shows the turning state and raising/lowering state of a grain conveying apparatus.

A normal type combine is shown in FIGS. 1 to 9, where F indicates the forward direction, B indicates the rearward direction, U indicates the upward direction, and D indicates the downward direction. , where R indicates the right direction and L indicates the left direction.

(Overall configuration of combine harvester)
As shown in FIGS. 1 and 2, a vehicle body 1 is supported by right and left crawler type running gears 2 and a driving section 3 is provided on the front right portion of the vehicle body 1 . A threshing device 4 is provided at the rear left portion of the machine body 1 , and a grain tank 5 and a grain conveying device 6 are provided at the rear right portion of the machine body 1 . A feeder 7 is connected to the front part of the threshing device 4 and extends forward, and a reaping part 8 is connected to the front part of the feeder 7 .

With the above configuration, as the machine body 1 advances, the crops in the field are introduced into the reaping unit 8 and harvested. It is processed. The grains threshed and collected by the threshing device 4 are stored in the grain tank 5, and when the grain tank 5 becomes full, the grains in the grain tank 5 can be discharged by the grain conveying device 6. can.

(Configuration of grain conveying device)
As shown in FIGS. 1 and 2, the grain conveying device 6 is provided with a vertical conveying section 9, a relay conveying section 10, a horizontal conveying section 11, a grain discharge port 12, a support case 13, and the like.

A support case 13 is connected to the lower portion of the rear portion of the grain tank 5 and supported by the rear portion of the fuselage 1 so as to be rotatable around an axis P1 extending in the vertical direction. A lower portion of the vertical conveying portion 9 is attached to the support case 13 so as to be rotatable around the axis P1.

A support frame 14 extending in the vertical direction is connected to the rear portion of the fuselage 1 . The vertical transport section 9 is rotatably supported around an axis P1 by ring-shaped support members 15 and 16 connected to the upper and lower portions of the support frame 14 . The upper portion of the vertical transport portion 9 is supported by a ring-shaped support member 17 connected to the upper portion of the rear portion of the grain tank 5 so as to be rotatable around the axis P1.

With the above configuration, the vertical transport section 9 is connected to the lower portion of the grain tank 5 via the support case 13 and arranged along the vertical direction, and the vertical transport section 9 and the support case 13 are arranged around the axis P1. rotatably supported on the

As shown in FIGS. 1, 2, 3 and 4, the intermediary transport section 10 is provided with a first portion 21 and a second portion 22 . The first portion 21 is configured in an angle shape and connected to the upper portion of the vertical transport section 9 . The second portion 22 is configured in an angle shape and attached to the lateral portion of the first portion 21 so as to be vertically swingable about a central axis P2 along the horizontal direction. The center axis P2 is arranged at the center position in the vertical direction of the first portion 21 and at the center position in the width direction of the first portion 21 .
With the above configuration, the relay conveying section 10 (the first portion 21 and the second portion 22) is connected to the upper portion of the vertical conveying section 9 along the horizontal direction.

The horizontal conveying portion 11 is connected to the second portion 22 of the relay conveying portion 10, and is in a state of being connected to the relay conveying portion 10 so as to be capable of swinging up and down about the central axis P2 of the relay conveying portion 10. . A grain discharge port 12 is provided downward at the terminal end of the horizontal conveying section 11 .

As shown in FIGS. 7 and 8, a waterproof light 18 is attached downward to the end of the horizontal transport section 11, and a synthetic resin cover 19 is attached to cover the light 18. As shown in FIGS. A guard member 20 formed by bending a metal rod-like member into a channel shape in a plan view is attached to an end portion of the horizontal conveying portion 11 and arranged along the inner surface of the lower side portion of the cover 19 . there is

As shown in FIGS. 1 and 2, in the grain conveying device 6, inside the vertical conveying portion 9, the relay conveying portion 10 (first portion 21 and second portion 22), and the horizontal conveying portion 11, spiral conveying A body (not shown) is positioned. By rotating the conveying body, the grains in the grain tank 5 are transported from the inside of the support case 13 to the vertical conveying portion 9, the intermediate conveying portion 10 (the first portion 21 and the second portion 22), and the horizontal conveying portion 11. It is conveyed through the interior and discharged from the grain outlet 12 .

(Swivel configuration of grain conveying device)
As shown in FIGS. 1 and 2, the support member 15 is provided with an electric motor 23 capable of rotationally driving the vertical conveying section 9 with respect to the support frame 14 and the support member 15 about the axis P1.

In the state shown in FIGS. 1 and 2, the electric motor 23 rotates the vertical conveying portion 9 around the axis P1, thereby the grain conveying device 6 (the vertical conveying portion 9, the relay conveying portion 10 (the first portion) 21 and the second part 22), the horizontal conveying part 11, and the grain discharge port 12) are turned.

In the stopped state of the electric motor 23, the grain tank 5 and the support case 13 are swung around the axis P1 (vertical conveying section 9), so that the grain tank 5 is moved to the right side away from the machine body 1. . Thereby, maintenance work can be performed on the portion of the grain tank 5 side of the threshing device 4 and the portion of the grain tank 5 on the side of the threshing device 4 .

(Structure of raising and lowering the grain conveying device)
As shown in FIGS. 1, 2, 3, and 4, the first elevating member 31 is vertically mounted around the central axis P2 on the boss portion 21a of the first portion 21 of the intermediary conveying portion 10 on the opposite side of the lateral conveying portion 11. It is swingably supported.

As shown in FIGS. 3, 4, 5, and 6, the first elevating member 31 includes a vertical surface portion 31a extending in the vertical direction and an upper surface portion 31b extending in the horizontal direction from the upper portion of the vertical surface portion 31a toward the horizontal conveying portion 11. , and a lower surface portion 31c extending in the horizontal direction from the lower portion of the vertical surface portion 31a toward the horizontal conveying portion 11, and has a groove-shaped cross section.

As shown in FIGS. 1, 2, 3, and 4, a bracket 24 is connected to the horizontal transport section 11, and a round bar-shaped second elevating member 32 extends across the end of the first elevating member 31 and the bracket 24. are connected, and the second elevating member 32 is attached across the first elevating member 31 and the horizontal conveying section 11 . The horizontal conveying portion 11, the second portion 22 of the intermediate conveying portion 10, the first elevating member 31 and the second elevating member 32 are integrally configured to swing up and down about the central axis P2.

A bracket 25 is connected to the first portion 21 of the intermediary transport section 10 , and the bracket 25 is sufficiently spaced upward from the grain tank 5 . The elevating cylinder 26 is connected across the bracket 25 and the second elevating member 32 and arranged between the first elevating member 31 and the horizontal transport section 11 in plan view.

With the above configuration, the elevating cylinder 26 expands and contracts, so that the horizontal conveying section 11, the second portion 22 of the intermediate conveying section 10, and the first elevating member 31 are integrated with each other through the second elevating member 32. Lifting operation is performed around P2.

(Rotating operation and lifting operation of the grain conveying device)
A right turn switch (not shown), a left turn switch (not shown), an up switch (not shown), and a down switch (not shown) that can be operated by the operator are provided in the operation unit 3. . When the right turning switch is operated, the grain conveying device 6 is turned right by the electric motor 23 as described in the above-mentioned (Structure of turning of the grain conveying device), and the left turning switch is operated. is operated, the grain conveying device 6 is turned rightward by the electric motor 23 .

When the up switch is operated, the elevating cylinder 26 is extended as described in the above-mentioned (elevating structure of the grain conveying device), and the horizontal conveying section 11 is operated up. When operated, the elevating cylinder 26 is retracted, and the horizontal conveying section 11 is lowered.

As shown in FIG. 2 , a cradle 30 is provided on the upper part of the front part of the threshing device 4 on the left side of the operation part 3 . When the grain conveying device 6 is not used, the grain conveying device 6 is placed in the storage position A1 (see FIG. 9) where the horizontal conveying portion 11 is placed on the receiving table 30. FIG.

(Structure for detecting the vertical swing position of the horizontal conveying section)
As shown in FIGS. 3, 4, 5, and 6, in the first portion 21 of the intermediary conveying section 10, a stay 27 is connected to the portion on the side of the second elevating member 32 in plan view, and the stay 27 is connected to the first portion. It extends toward the lifting member 31 .

A potentiometer type height sensor 28 is attached to the stay 27 , and the height sensor 28 is supported via the stay 27 on the intermediary transport section 10 (first portion 21 ).
The height sensor 28 is arranged between the upper portion of the relay transport section 10 (first portion 21) and the center axis P2 when viewed in the horizontal direction (see FIG. 3).

In a plan view, the height sensor 28 is arranged at a position on the side of the horizontal conveying section 11 with respect to the first lifting member 31 and arranged between the first lifting member 31 and the horizontal conveying section 11 . (See Figure 4).

The height sensor 28 is arranged so that the detection shaft 28a of the height sensor 28 protrudes from the stay 27 toward the first elevating member 31, and the detection shaft 28a of the height sensor 28 is aligned with the central axis P2. It is rotatable forward and backward around a parallel axis P3.

The arm portion 29 is connected to the detection shaft 28a of the height sensor 28 and extends from the detection shaft 28a of the height sensor 28 toward the central axis P2. , the arm portion 29 can swing vertically.

A round-bar-shaped connection pin 29a (corresponding to a connection portion) is connected to the end of the arm portion 29, and the connection pin 29a moves from the arm portion 29 in a state parallel to the central axis P2 and the axis P3 in the first elevation. It extends toward the member 31 . The connecting pin 29a of the arm portion 29 is arranged between the upper surface portion 31b and the lower surface portion 31c of the first lifting member 31 when viewed from the extending direction of the first lifting member 31 (see FIG. 5).

A biasing member (not shown) such as a spring provided inside the height sensor 28 biases the detection shaft 28a of the height sensor 28 counterclockwise in FIG. As a result, the arm portion 29 is urged downward by the urging member, and the arm portion 29 is urged downward so that the connection pin 29a of the arm portion 29 contacts the upper surface of the lower surface portion 31c of the first elevating member 31 . The arm portion 29 is biased toward the lower surface portion 31 c of the lifting member 31 and connected to the first lifting member 31 .

(Detection of vertical swing position of horizontal transport section by height sensor)
With the above-described (configuration for detecting the vertical swing position of the horizontal conveying section), the vertical swing position of the horizontal conveying section 11 is detected by the height sensor 28 as described below.

Suppose that the horizontal conveying section 11 (first elevating member 31) is stopped in the state indicated by the solid line in FIG.
In this state, the urging member of the height sensor 28 urges the arm portion 29 toward the lower surface portion 31c of the first elevating member 31, and the connection pin 29a of the arm portion 29 touches the lower surface of the first elevating member 31. It is in contact with the upper surface of the portion 31c.

When the horizontal conveying section 11 is lifted, the first lifting member 31 swings upward as shown from the solid line to the two-dot chain line in FIG. While sliding along the lower surface portion 31c, the connection pin 29a of the arm portion 29 is pushed up by the lower surface portion 31c of the first elevating member 31 against the biasing member of the height sensor 28, and the arm portion 29 is pushed up. follows the first elevating member 31 and swings upward.

When the horizontal conveying section 11 is lowered, the first lifting member 31 swings downward as shown from the two-dot chain line to the solid line in FIG. While sliding along the lower surface portion 31c of the first lifting member 31, the arm portion 29 is moved by the biasing member of the height sensor 28 so that the connection pin 29a of the arm portion 29 does not separate from the lower surface portion 31c of the first elevating member 31. It swings downward following the first lifting member 31 .

When the first lifting member 31 swings, the connection pin 29a of the arm portion 29 slides along the lower surface portion 31c of the first lifting member 31, so that the trajectory of the connection pin 29a of the arm portion 29 and the first The difference from the trajectory of the lifting member 31 is absorbed.

As described above, the position (vertical angle) of the first elevating member 31 is detected by the height sensor 28 via the arm portion 29 due to the arm portion 29 swinging with the swinging of the first elevating member 31 . , and the position (vertical angle) of the first elevating member 31 is detected by the height sensor 28 .
The height sensor 28 detects the vertical swing position of the horizontal transport section 11 by detecting the position (vertical angle) of the first elevating member 31 .

By changing the position of the height sensor 28 along the extension direction of the first elevating member 31 in a side view or by changing the length of the arm portion 29, the length of the first elevating member 31 (the first elevating member The length between the portion of the lower surface portion 31c of the arm portion 29 with which the connection pin 29a of the arm portion 29 contacts and the central axis P2) can be changed.

As a result, the length of the first elevating member 31 (the length between the portion of the lower surface portion 31c of the first elevating member 31 with which the connecting pin 29a of the arm portion 29 contacts and the central axis P2) and the length of the arm portion 29 By setting the ratio of . can be made

(Control in turning operation and lifting operation of grain conveying device)
As described in the above-mentioned (configuration of turning of the grain conveying device), when the grain conveying device 6 is turned around the axis P1 by the electric motor 23, the vertical conveying section 9 rotates around the axis P1. A turning position sensor (not shown) is provided for detecting the turning position of the grain conveying device 6 by detecting the position.
As described above in (Detection of Vertical Swing Position of Horizontal Transfer Section by Height Sensor), the height sensor 28 detects the vertical swing position of the horizontal transfer section 11 .

When the operator operates the right turn switch, the left turn switch, the up switch and the down switch to move the grain transport device 6 to the storage position A1, based on the detection of the turning position sensor and the height sensor 28, Operations are performed as described below.

As shown in FIG. 9, when the operator turns the grain conveying device 6 to the left by operating the left turning switch, and the horizontal conveying unit 11 approaches the driving unit 3 from the right side (stroke B1), When the horizontal conveying unit 11 reaches a position A2 which is slightly away from the driving unit 3 to the right, the grain conveying device 6 is automatically stopped and an alarm is activated. The operator operates the lift switch to lift the horizontal conveying section 11 (step B2).

When the horizontal conveying unit 11 reaches a position A3 higher than the operating unit 3, the alarm stops, so the operator operates the left turning switch to turn the grain conveying device 6 leftward (step B3). When the horizontal conveying unit 11 reaches the position A4 above the storage position A1, the grain conveying device 6 is automatically stopped, and the alarm is activated several times before stopping. The operator operates the lowering switch to lower the horizontal conveying section 11 to move the grain conveying device 6 to the storage position A1 (step B4).

When the worker turns the grain conveying device 6 to the right by operating the right turn switch and the horizontal conveying unit 11 approaches the driving unit 3 from the left side (step B5), the horizontal conveying unit 11 retracts. When the position A5 above the position A1 is reached, the grain conveying device 6 is automatically stopped, and the alarm is activated several times before stopping. The operator operates the lowering switch to lower the horizontal conveying section 11 to move the grain conveying device 6 to the storage position A1 (step B6).

(First alternative embodiment of the invention)
The arm portion 29 extends from the detection shaft 28a of the height sensor 28 toward the opposite side of the central axis P2, and the biasing member biases the detection shaft 28a of the height sensor 28 clockwise in FIG. The connecting pin 29 a of the arm portion 29 may be configured to contact the upper surface of the lower surface portion 31 c of the first elevating member 31 .

The arm portion 29 extends from the detection shaft 28a of the height sensor 28 toward the central axis P2, and the biasing member biases the detection shaft 28a of the height sensor 28 clockwise in FIG. The connection pin 29a may be configured to contact the lower surface of the upper surface portion 31b of the first elevating member 31. As shown in FIG.

The arm portion 29 extends from the detection shaft 28a of the height sensor 28 toward the opposite side of the central axis P2, and the biasing member biases the detection shaft 28a of the height sensor 28 counterclockwise in FIG. Alternatively, the connecting pin 29a of the arm portion 29 may be configured to contact the lower surface of the upper surface portion 31b of the first elevating member 31. As shown in FIG.

A biasing member may be provided outside the height sensor 28 and configured to be connected to the arm portion 29 .

(Second alternative embodiment of the invention)
A long hole (not shown) along the extending direction of the first lifting member 31 is opened in the vertical surface portion 31a of the first lifting member 31, and the connection pin 29a of the arm portion 29 is inserted into the long hole, The arm portion 29 may be configured to be connected to the first elevating member 31 .

This configuration eliminates the need for a biasing member.
According to this configuration, the height sensor 28 can be configured to be arranged on the side opposite to the horizontal transport section 11 with respect to the first lifting member 31 in plan view.

(Third alternative embodiment of the invention)
The arm portion 29 may extend from the detection shaft 28 a of the height sensor 28 toward the opposite side of the central axis P<b>2 , and the arm portion 29 may be connected to the second lifting member 32 . The height sensor 28 detects the position of the second elevating member 32 and detects the vertical swing position of the horizontal conveying section 11 .
In this configuration, an elongated hole (not shown) along the extension direction of the arm portion 29 is opened in the arm portion 29, and the second elevating member 32 is inserted into this elongated hole.

The present invention can be applied not only to ordinary combine harvesters but also to self-threshing combine harvesters.

5 grain tank 6 grain conveying device 9 vertical conveying section 10 relay conveying section 11 horizontal conveying section 12 grain outlet 26 lifting cylinder 27 stay 28 height sensor 29 arm section 29a connecting pin (connecting portion)
31 First lifting member 31a Vertical surface portion 31b Upper surface portion 31c Lower surface portion 32 Second lifting member P2 Central axis

Claims (6)

a grain tank for storing grain;
A grain conveying device capable of discharging grains from the grain tank is provided,
In the grain conveying device, a vertical conveying unit connected to the lower part of the grain tank and arranged along the vertical direction, and a relay conveying unit connected to the upper part of the vertical conveying unit along the horizontal direction , a horizontal conveying unit connected to the relay conveying unit so as to be able to swing vertically around the central axis of the relay conveying unit; and a grain discharge port provided at the end of the horizontal conveying unit,
a first elevating member supported by the relay conveying unit so as to be vertically swingable around the central axis;
a second elevating member attached across the first elevating member and the horizontal conveying unit;
an elevating cylinder that is connected to the second elevating member and expands and contracts to operate the horizontal conveying unit up and down around the central axis;
a height sensor that detects the vertical swing position of the horizontal conveying unit by detecting the position of the first elevating member ,
The height sensor is provided with an arm that can swing in the vertical direction,
The arm portion is connected to the first lifting member,
A combine harvester in which the position of the first elevating member is detected by the height sensor when the arm swings with the swinging of the first elevating member. The first elevating member is supported by a portion of the relay conveying portion opposite to the lateral conveying portion,
The combine according to claim 1 , wherein the height sensor is arranged at a position on the side of the horizontal conveying section with respect to the first lifting member in plan view. The first elevating member includes a vertical surface portion extending in the vertical direction, an upper surface portion extending in the horizontal direction from the upper portion of the vertical surface portion toward the horizontal conveying portion, and a horizontal portion extending from the lower portion of the vertical surface portion toward the horizontal conveying portion. formed in a cross-sectional groove shape having a lower surface portion extending in the direction of
3. The connection portion of the end of the arm portion connected to the first elevating member is arranged between the upper surface portion and the lower surface portion when viewed from the extending direction of the first elevating member. combine harvester . the arm portion is biased toward the upper surface portion or the lower surface portion so that the connecting portion of the arm portion contacts the upper surface portion or the lower surface portion;
The combine according to claim 3 , wherein the arm swings while the connecting portion of the arm slides on the upper surface or the lower surface as the first lifting member swings. The combine according to any one of claims 1 to 4 , wherein the height sensor is arranged between an upper portion of the relay conveying portion and the central axis when viewed in a horizontal direction. . The combine according to any one of claims 1 to 5, wherein the height sensor is supported by the relay conveying section via a stay.

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