JP6870575B2 - combine - Google Patents

Description

The present invention relates to a combine.

Conventionally, in a cutting device that automatically controls the cutting height so that it is located at a predetermined height by a cutting height detection device provided at a predetermined position, the cutting height detection device rotates a contact body on the front side of the case by a front shaft. A configuration is known in which a case is movably attached, the rear side of the case is rotatably attached to a bracket by a rear axis, and a holding means for holding the case in a storage position is provided (see, for example, Patent Document 1). ..

Japanese Unexamined Patent Publication No. 2015-122977

Since the known one has a configuration in which the case is held by a holding means composed of pins, it is troublesome to manage the pins in an unused state, and as a result, switching between the storage position and the use position of the cutting height detection device is performed. There is a problem that the work is troublesome.
In the present application, the structure of the stopper mechanism of the cutting height detection device is devised to facilitate the switching work between the storage position and the usage position of the cutting height detection device 30.

In the invention according to claim 1, a threshing device 3 is provided above the traveling device 2, a cutting device 4 is provided in front of the threshing device 3, and the cutting device 4 is used to weed a plurality of culms in a field. It is composed of a grass device 7, a raising device 8 that causes a threshing culm, and a cutting blade 10 that cuts the root of the raised culm, and a cutting height that detects the ground height of the cutting device 4. In the combine in which the cutting detection device 30 is provided at a predetermined position of the cutting device 4, the cutting height detection device 30 rotates the front side portion of the case 32 horizontally along the weeding device 7 side by the first axis 33 in the left-right direction. A contact body 50 that is movably attached and projects rearward from the case 32 so as to allow downward rotation but restrict upward rotation by a second shaft 46 in the left-right direction at the rear portion of the case 32. A base portion is rotatably attached, and a detection device 58 for detecting the rotational position of the case 32 around the first shaft 33 is provided in the case 32, and the above-mentioned is provided between the case 32 and the weeding device 7 side. A stopper mechanism 70 having an engaging portion 72 that engages with the tip portion 60 of the contact body 50 and holds it in the storage position is provided, and the stopper mechanism (70) lowers the contact body (50) with respect to the case (32). A combine in which the case (32) is rotated upward around the first shaft (33) while being rotated so as to pass through the engaging portion (72) of the stopper mechanism (70) and engage with the culm. Is.
In the invention according to claim 2, the stopper mechanism 70 is a combine according to claim 1 provided within the left-right width of the weeding device 7.
According to the third aspect of the present invention, the cutting height detection device 30 and the stopper mechanism 70 are provided with the weeding guides 75 in the front-rear direction on the left and right sides, and the stopper mechanism 70 is located higher than the weeding guide 75. It is the combine according to claim 1 provided.
The invention according to claim 4 is the combine according to claim 1, wherein the stopper mechanism 70 is provided behind the tip 60 of the contact body 50.
According to the fifth aspect of the present invention, the stopper mechanism 70 is formed by providing a mounting portion 81 bent in the lateral direction at the base of a main body portion 80 formed of a U-shaped piano wire, and mounting the stopper mechanism 70. The combine according to any one of claims 1 to 4, wherein the portion 81 is rotatably attached to a pair of left and right mounting plates 82 provided on the weeding device 7 side.

According to the first aspect of the present invention, when the cutting height detection device 30 does not need to control the cutting height, such as when cutting wheat by raising the cutting device 4 higher in a field where ridges are formed in the field scene. The lowering of the contact body 50 of the detection device 30 is stopped by the stopper mechanism 70, and the contact body 50 comes into contact with the ridges to erroneously detect the cutting height, or the contact body 50 of the cutting height detection device 30 is erroneously detected on a grain or the like. Can be prevented from being caught.
In the invention according to claim 2, in addition to the effect of the invention according to claim 1, the presence of the stopper mechanism 70 does not affect the posture of the grain culm in the field, and the cutting height detection device 30 and the stopper mechanism 70. To prevent damage.
In the invention according to claim 3, in addition to the effect of the invention according to claim 1, the grain culm planted by the weeding device 7 is continuously weeded by the weeding guide 75, and the grain culm stock source. Since the stopper mechanism 70 is located above the left and right weed guides 75, which is the passage range of the above, the presence of the stopper mechanism 70 does not affect the posture of the culm in the field.
In the invention according to claim 4, in addition to the effect of the invention according to claim 1, the stopper mechanism 70 can hold the tip portion 60 of the contact body 50 in a state of facing backward, so that the contact body 50 can be reliably lowered. Can be regulated.
In the invention according to claim 5, in addition to the effect of the invention according to any one of claims 1 to 4, the stopper mechanism 70 is laterally oriented to the base of the main body portion 80 formed by the U-shaped piano wire. Since the mounting portion 81 bent and formed is provided and rotatably mounted on the weeding device 7 side, the stopper does not affect the cutting height control depending on the material, shape, and mounting configuration of the stopper mechanism 70. A mechanism 70 can be provided, and damage to the stopper mechanism 70 and the cutting height detecting device 30 can be prevented.

Side view of the combine. Side view of the cutting device near the weeding device. The same front view. Side view of the cutting device near the weeding device. Side view near the cutting height detection device. Side view near the cutting height detection device. Sectional drawing of the cutting height detection apparatus. A side view and a plan view explaining the position change state of the cutting height detection device. Top view near the cutting height detector. A side view of another embodiment of the cutting height detector. A front view of the main body of the stopper mechanism in an unfolded state and a front view of the stopper mechanism. Side view of the state where the position of the main body of the stopper mechanism is switched. A side view and a plan view illustrating a position change state of another embodiment of the cutting height detection device.

An embodiment of the present invention will be described with reference to a diagram. 1 is a machine frame, 2 is a traveling device, 3 is a threshing device provided above the traveling device 2, 4 is a cutting device, and 5 is a side portion of the threshing device 3. The provided Glen tank 5, 5 is a Glen tank, and 6 is a control unit.
The cutting device 4 includes a plurality of weeding devices 7 arranged at intervals in the left-right direction, and a plurality of raising devices 8 and the like provided behind each weeding device 7. Behind the raising device 8, a cutting blade 10 for cutting the root of the grain culm and a grain culm transporting device for transporting the cut culm are provided.
The cutting device 4 is configured by attaching the tip of the vertical support frame 21 to the cutting frame 20, and rotatably attaches the base of the vertical support frame 21 to a support base (not shown) provided on the body frame 1 side, and cuts the upper and lower cylinders. (Not shown) allows it to move up and down.

The cutting device 4 automatically controls the cutting height so that it is located at a predetermined height by the cutting height detecting device 30 provided in the cutting device 4, and performs the cutting work.
The configuration of the cutting height detection device 30 is arbitrary, but as an example, the front side of the case 32 is rotatably attached to the weeding device 7 side by the first shaft 33 in the left-right direction via the bracket 35. The bracket 35 is composed of a mounting portion 36 mounted on the cutting device 4 side and a deformed portion 37 formed of an elastic member that allows the mounting portion 36 to move at least in the lateral direction (horizontal direction) by a force received from the outside of the machine.
That is, as shown in FIG. 6, the tip of the weed 杆 40 in the front-rear direction in which the base is attached to the cutting frame 20 side to which the weeding device 7 is attached is bent upward to form the bent portion 41, and the lower surface of the bent portion 41 is formed. A space 42 is formed between the (front surface) and the field scene, and the cutting height detection device 30 is positioned in the space 42.

The mounting portion 36 of the bracket 35 is mounted in a fixed state on the weeding device 7 located in the front portion in the space 42, the first shaft 33 is provided in the fixed state on the mounting portion 36, and the shaft cylinder of the case 32 is provided on the first shaft 33. 34 is rotatably attached.
A second shaft 46 in the left-right direction is provided at the rear portion of the case 32, and the base portion of the contact body 50 projecting rearward is rotatably attached to the second shaft 46 (FIGS. 6 and 7).
The contact body 50 is provided with a mounting portion 56 on the upper portion of a contact portion 55 formed of plate members in the left-right direction, the mounting portion 56 is fixed to the second shaft 46, and the second shaft 46 is rotatably mounted on the case 32.
The contact body 50 is configured so as to rotate in the clockwise direction but not in the counterclockwise direction.

That is, the stopper 43 is fixed to the second shaft 46 of the contact body 50, and the contact portion 55 constantly contacts a predetermined portion of the inner wall of the case 32 at a predetermined position to rotate in the counterclockwise direction. regulate.
Reference numeral 44 denotes a spring that urges the contact body 50 to rotate upward at all times around the center of the second shaft 46, and the stopper 43 abuts on a predetermined portion of the inner wall of the case 32 to regulate the upward rotation of the contact body 50. ..
A stopper 45 is fixed to the first shaft 33 fixed to the bracket 35 side, and the stopper 45 always abuts on the contact portion 45A provided in the case 32 and rotates on the first shaft 33 via the shaft cylinder 34. The downward rotation of the freely attached case 32 is restricted.

The case 32 rotates from the lowermost position where the stopper 45 abuts on the abutting portion 45A to the uppermost position where the stopper 45 abuts on the inner wall of the case 32 on the opposite side of the abutting portion 45A.
Reference numeral 49 denotes a spring that urges the case 32 to rotate (rotate downward) in the clockwise direction at all times, and holds the case 32 and the contact body 50 in a predetermined position.
The case 32 is provided with a detection device (potentiometer) 58 that detects a rotational position around the first axis 33 with respect to the bracket 35. An arm 48 is fixed to the detection shaft 58A of the detection device 58, and the arm 48 engages an engagement pin 47 provided on the stopper 45.
The engagement pin 47 and the arm 48, which are a part of the detection device 58, are provided in the case 32.

When the tip of the contact body 50 comes into contact with the field scene when the machine body advances, the cutting height detection device 30 integrates the case 32 with the center of the first shaft 33 while maintaining the contact body 50 fixed with respect to the second shaft 46. The arm 48 rotates with respect to the positionless engaging pin 47, and the detection device 58 detects the rotation position of the arm 48 and sends a signal to raise the cutting device 4.
On the contrary, when the tip of the contact body 50 tries to move away from the field scene, the case 32 rotates downward toward the center of the first shaft 33 due to the elasticity of the spring 46, and the arm 48 with respect to the engaging pin 47 due to the downward rotation of the case 32. The detection device 58 detects the rotation of the cutting device 58 and sends a signal to lower the cutting device 4 to automatically control the cutting height.
Further, when the machine is moving backward, when the tip of the contact body 50 comes into contact with the field scene, the contact body 50 rotates clockwise around the center of the second axis 46 to retract and break. To prevent.

The tip side of the contact portion 55 in the vertical direction is bent rearward to form the tip portion 60.
Therefore, the tip 60 of the contact portion 55 comes into contact with the field scene in a horizontal state as compared with the case where it is not bent, and the followability to the unevenness of the field scene is improved.
The upper end of the tip portion 60 is positioned above the lower end surface of the case 32 in a state where the contact body 50 is not in contact with the field.
Therefore, it is possible to prevent the straw debris from being caught in the gap between the case 32 and the contact body 50.
In FIG. 6, a plurality of lines are shown in order to facilitate understanding of the positional relationship between the contact body 50 and the field scene, but the configuration of the present invention is not limited thereto.

Therefore, a stopper mechanism 70 for preventing the cutting height detecting device 30 (case 32) from descending is provided between the case 32 of the cutting height detecting device 30 and the weeding device 7 (FIG. 2 and the like). The stopper mechanism 70 includes an engaging portion 72 that engages with the mounting portion 71 and the tip portion 60 of the contact body 50 (FIG. 8), and the tip portion 60 of the contact body 50 engages with the engaging portion 72 of the stopper mechanism 70. Engage and hold in the retracted position.
As a result, when the cutting device 4 for cutting wheat or the like is raised high and control by the cutting height detecting device 30 is unnecessary, the lowering of the cutting height detecting device 30 is stopped by the stopper mechanism 70. It prevents the contact body 50 of the cutting height detection device 30 from being caught in the grain culm or the like.
In this case, the stopper mechanism 70 is provided inside the passage range of the grain culm.
As a result, the presence of the stopper mechanism 70 does not affect the posture of the grain culm in the field.

The stopper mechanism 70 is provided inside the left and right width of the weeding device 7.
As a result, the presence of the stopper mechanism 70 does not affect the posture of the grain culm in the field, and the cutting height detection device 30 and the stopper mechanism 70 are prevented from being damaged.
The stopper mechanism 70 is provided above the passing range of the grain culm stock source.
That is, a pair of weeding guides 75 are provided in the front-rear direction on the side of the cutting height detection device 30 and the stopper mechanism 70, and the front end of the weeding guide 75 is attached to the bracket 35 with the front end lower than the first shaft 33. There is.
As a result, the grain culm sown by the weeding device 7 is continuously sown by the culm guide 75, and is located above the left and right culm guides 75, which is the passage range of the culm stock source. Since the stopper mechanism 70 is located in the field, the presence of the stopper mechanism 70 does not affect the posture of the grain culm in the field.

Although the weeding guide 75 is omitted in FIGS. 4, 6 and the like for easy understanding, the configuration of the present invention is not limited thereto.
The stopper mechanism 70 is provided above the lower straight portion 40A of the weeding rod 40 which is parallel to the field scene (FIG. 2).
As a result, the presence of the stopper mechanism 70 does not affect the posture of the grain culm in the field, and the cutting height detection device 30 and the stopper mechanism 70 are prevented from being damaged.
The stopper mechanism 70 is provided behind the tip 60 of the contact portion 55 of the contact body 50 of the cutting height detection device 30.
As a result, it is possible to regulate a reliable descent farther from the first shaft 33, which is a rotation fulcrum of the cutting height detection device 30.
The stopper mechanism 70 is provided outside the normal operating range of the tip 60 of the contact portion 55 of the contact body 50 of the cutting height detection device 30.

As a result, the presence of the stopper mechanism 70 does not affect the cutting height detecting device 30 during normal cutting height control.
The stopper mechanism 70 is provided at a position where it can be fixed above the normal operating range of the tip 60 of the contact portion 55 of the contact body 50 of the cutting height detection device 30.
That is, the contact body 50 can rotate clockwise around the center of the first axis 33, but since the rotation in the counterclockwise direction is restricted by the stopper 43 and the spring 44, the contact body 50 is clocked around the center of the second axis 46. When the cutting height detection device 30 is rotated counterclockwise while rotating, the tip 60 of the contact body 50 can pass the tip of the engaging portion 72 of the stopper mechanism 70, whereby the contact body 50 The tip 60 returns to its original position and engages with the stopper mechanism 70.

Therefore, in the stopper mechanism 70, the tip 60 of the contact portion 55 of the contact body 50 of the cutting height detection device 30 is located above the normal operating range and passes through the contact body 50 of the cutting height detection device 30. Taking advantage of the fact that the contact body 50 does not rotate counterclockwise when the contact body 50 is moved, the rotation range and the stopper in the clockwise rotation direction of the contact body 50 of the cutting height detection device 30 so as to engage with the stopper mechanism 70. The stopper mechanism 70 is provided in relation to the height position of the mechanism 70.
As a result, the stopper mechanism 70 can satisfactorily hold the cutting height detection device 30 in the retracted position.
When the contact body 50 of the cutting height detection device 30 is held and fixed by the stopper mechanism 70, the contact body 50 is located above the normal operating range, and when this is detected by the detection device 58, the cutting height is detected. The automatic control of the cutting height by the device 30 is disabled.

As a result, it is possible to prevent erroneous detection of the cutting height detecting device 30 at the time of high cutting.
In this case, even if the automatic cutting height control switch (not shown) for executing the automatic cutting height control is turned on, if the holding and fixing of the cutting height detecting device 30 by the stopper mechanism 70 is detected, the cutting height is detected. The automatic control of the cutting height by the device 30 is disabled.
As a result, it is possible to prevent erroneous detection of the cutting height detecting device 30 at the time of high cutting and the like, and it is possible to improve operability.
When the automatic control of the cutting height by the cutting height detection device 30 is disabled while the automatic cutting height control switch is on, the operator is notified by sound, voice, or the like.
As a result, the operator can easily and accurately grasp the working state, and the operability can be improved.

Further, when the automatic cutting height control switch is turned on with the cutting height detecting device 30 fixed by the stopper mechanism 70, a monitor (not shown) may indicate that fact.
FIG. 10 shows another embodiment of the stopper mechanism 70, in which a mounting portion 81 formed by a U-shaped piano wire and bent in the lateral direction is provided at the base of an arm-shaped and U-shaped main body portion 80. Form.
The stopper mechanism 70 rotatably attaches the attachment portion 81 to the pair of left and right attachment plates 82 provided on the weeding rod 40.
As a result, the contact body 50 of the cutting height detecting device 30 is hooked on the main body portion 80 of the stopper mechanism 70 to store and hold the cutting height detecting device 30.
Therefore, the cutting height detection device 30 can be stored and held without a tool.
The left and right mounting portions 81 of the stopper mechanism 70 may be mounted by changing the mounting height position to the mounting plate 82 (FIG. 12).

As a result, the main body portion 80 of the stopper mechanism 70 receives a twisting action to increase the support rigidity of the cutting height detection device 30, and restricts the stopper mechanism 70 from rotating downward toward the center of the mounting portion 81 to prevent the cutting height. The detection device 30 is stored and held.
That is, the main body portion 80 of the stopper mechanism 70 is rotatably attached between a support position that supports the cutting height detection device 30 and a retracting position that retracts rearward from below the cutting height detection device 30. By changing the mounting heights of the left and right mounting portions 81 of the 70, the support posture and the retracted posture of the main body portion 80 can be switched and held, and the cutting height detection device 30 is once retracted. The main body portion 80 may be rotated upward to the support position at the storage position of the cutting height detection device 30, which facilitates the storage operation of the cutting height detection device 30.

The configuration for holding the posture of the main body portion 80 of the stopper mechanism 70 is arbitrary, but in other words, the mounting portions 81 of the stopper mechanism 70 are not positioned in the same linear direction in the axial direction, respectively. The mounting position on the mounting plate 82 is changed so that the main body portion 80 is twisted.
In this case, of the plurality of weeding rods 40 provided with the stopper mechanism 70 in the left-right direction, the weeding rod 40 provided at the center is positioned above the passing position of the raising lug 85 of the raising device 8.
This prevents the weed rod 40 from pushing down the grain culm in the field during turning.
Further, among the plurality of weed rods 40 provided with the stopper mechanism 70 in the left-right direction, except for the weed rod 40 provided on the uncut land side on the left side, the position is above the passing position of the raising lug 85 of the raising device 8. Let me.

This prevents the weed culm 40 from pushing down the grain culm in the field when turning, and the grounding of the weed culm 40 at the left end makes it easy for the operator to visually recognize the grounding of the cutting device 4.
Further, the main body portion 80 of the stopper mechanism 70 is provided inside the width of the weeding device 7.
As a result, the presence of the stopper mechanism 70 does not affect the posture of the grain culm in the field, and the cutting height detection device 30 and the stopper mechanism 70 are prevented from being damaged.
Further, the main body portion 80 of the stopper mechanism 70 is provided so as to be located above the weeding guide 75, which is above the passing range of the grain culm stock source.
As a result, the main body portion 80 of the stopper mechanism 70 is located above the left and right weed guides 75, which is the passage range of the grain culm, so that the presence of the stopper mechanism 70 is in the posture of the grain culm in the field. Does not affect.
The tip of the main body portion 80 of the stopper mechanism 70 is provided above the lower straight portion 40A of the weeding rod 40 which is parallel to the field scene.

As a result, the presence of the stopper mechanism 70 does not affect the posture of the grain culm in the field, and the cutting height detection device 30 and the stopper mechanism 70 are prevented from being damaged.
The main body 80 of the stopper mechanism 70 is provided behind the tip 60 of the contact portion 55 of the contact body 50 of the cutting height detection device 30.
As a result, it is possible to regulate a reliable descent farther from the first shaft 33, which is a rotation fulcrum of the cutting height detection device 30.
The main body 80 of the stopper mechanism 70 is provided outside the normal operating range of the tip 60 of the contact portion 55 of the contact body 50 of the cutting height detection device 30.
As a result, the presence of the stopper mechanism 70 does not affect the cutting height detecting device 30 during normal cutting height control.
The main body 80 of the stopper mechanism 70 is provided at a position where it can be fixed above the normal operating range of the tip 60 of the contact portion 55 of the contact body 50 of the cutting height detection device 30.

That is, the contact body 50 can rotate clockwise around the center of the first shaft 33, but since the stopper 43 regulates the rotation in the counterclockwise direction, the cutting device 4 is once raised to detect the cutting height. When the cutting height detection device 30 is rotated counterclockwise while rotating the contact body 50 clockwise around the second axis 46 in this state, the tip portion of the contact body 50 is set to an other height that facilitates the retracting operation of the 30. 60 can pass the tip of the main body portion 80 of the stopper mechanism 70, and when the tip portion 60 of the contact body 50 passes through the tip of the main body portion 80 of the stopper mechanism 70, the contact body 50 is moved by the spring 4 to the second shaft 46. Rotating upward to the center, the tip 60 of the contact body 50 engages with the main body 80 of the stopper mechanism 70.

In other words, when the cutting height detection device 30 is rotated counterclockwise while rotating the contact body 50 clockwise around the second axis 46, the movement locus of the tip 60 of the contact body 50 is on the front side of the tip of the stopper mechanism 70. Therefore, the tip 60 of the contact body 50 can pass through the tip of the main body 80 of the stopper mechanism 70.
Therefore, the main body 80 of the stopper mechanism 70 is located above the normal operating range of the tip 60 of the contact portion 55 of the contact body 50 of the cutting height detection device 30, and the contact of the cutting height detection device 30. The contact of the cutting height detection device 30 so as to engage with the main body portion 80 of the stopper mechanism 70 by utilizing the fact that the contact body 50 does not rotate counterclockwise when passing through the tip portion 60 of the body 50. The mounting position of the stopper mechanism 70 is set by the relative relationship between the rotation range (rotation locus) of the body 50 in the clockwise rotation direction and the height position of the stopper mechanism 70.
As a result, the stopper mechanism 70 can satisfactorily hold the cutting height detection device 30 in the retracted position.

Further, the main body portion 80 of the stopper mechanism 70 is formed by a U-shaped piano wire, and a mounting portion 81 bent in the lateral direction is provided at the base of the arm-shaped and U-shaped main body portion 80 to form a weed. Since the mounting portion 81 is rotatably mounted on the pair of left and right mounting plates 82 provided on the rod 40, the main body portion 80 of the stopper mechanism 70 itself is elastically deformed, and the main body portion 80 is centered on the mounting portion 81. The rotation prevents the contact body 50 of the cutting height detection device 30 and the main body portion 80 of the stopper mechanism 70 from being damaged.

(Action of Embodiment)
The aircraft was run, weeded by the weeding device 7, the weeded culm was raised by the raising device 8, and the root of the raised culm was cut by the cutting blade 10 while being scraped by the scraping device. The cut grain culms are transported by the stock root transport device and the tip transport device of the grain culm transport device and handed over to the grain culm supply and transport device, and the grain culm supply and transport device supplies the grain culms to the grain removal device 3 to remove the grains.
At this time, the cutting height detection device 30 detects the vertical position of the cutting device 4 with respect to the field scene, and automatically performs automatic cutting height control to keep the cutting height constant at a predetermined height based on this detected value, in the combine harvester. Harvesting work is performed to improve grain transport and threshing performance.

The cutting height detection device 30 rotatably attaches the front portion of the case 32 to the attachment portion 52 of the bracket 35 by the first shaft 33 in the left-right direction, and provides the second shaft 46 in the left-right direction at the rear portion of the case 32. A detection device 58 that is configured by rotatably attaching the base of a contact body 50 projecting rearward to the second shaft 46 and detecting the rotational position of the case 32 around the first shaft 33 with respect to the cutting height detection device 30 bracket 35. When the contact body 50 comes into contact with the field scene, the contact body 50 is restricted from rotating upward with respect to the second shaft 46, and the case 32 is centered on the first shaft 33 due to the reaction force of the contact. The detection device 58 detects this and raises the cutting device 4.

Further, since the contact body 50 is configured to allow the second shaft 46 to rotate downward (clockwise rotation) from a predetermined position, the contact body 50 rotates in the clockwise rotation direction around the center of the second shaft 46 when the machine body moves backward. Move and evacuate.
Then, a stopper mechanism 70 for preventing the cutting height detecting device 30 (case 32) from descending is provided between the case 32 of the cutting height detecting device 30 and the weeding device 7, and the stopper mechanism 70 comes into contact with the case 32. Since the cutting height detection device 30 is prevented from rotating downward toward the center of the first shaft 33 in contact with the tip 60 of the contact portion 55 of the body 50, the cutting device 4 for cutting wheat or the like is raised high. When the cutting height detection device 30 does not need to control the cutting height detection device 30 in high cutting, the lowering of the cutting height detection device 30 is stopped by the stopper mechanism 70, and the contact body 50 of the cutting height detection device 30 is caught on the culm or the like. To prevent.

In this case, since the stopper mechanism 70 is provided inside the passage range of the grain culm, the presence of the stopper mechanism 70 does not affect the posture of the grain culm in the field.
Since the stopper mechanism 70 is provided inside the width of the weeding device 7, the presence of the stopper mechanism 70 does not affect the posture of the grain culm in the field, and the cutting height detection device 30 and the stopper mechanism 70 are damaged. To prevent.
A pair of left and right weeding guides 75 are provided on the sides of the cutting height detection device 30 and the stopper mechanism 70, and the stopper mechanism 70 is provided above the passage range of the culm stock source. The grain culm planted by 7 will continue to be planted by the planting guide 75.

As a result, the stopper mechanism 70 is located above the left and right weed guides 75, which is the passage range of the culm stock, so that the presence of the stopper mechanism 70 does not affect the posture of the culm in the field. ..
Since the stopper mechanism 70 is provided above the lower straight portion 40A of the weed culm 40 parallel to the field scene, the presence of the stopper mechanism 70 does not affect the posture of the grain culm in the field, and cutting Prevents damage to the height detection device 30 and the stopper mechanism 70.
Since the stopper mechanism 70 is provided behind the tip 60 of the contact portion 55 of the contact body 50 of the cutting height detecting device 30, it is farther from the first shaft 33 which is the rotation fulcrum of the cutting height detecting device 30. It is possible to regulate a reliable descent.

Since the stopper mechanism 70 is provided outside the normal operating range of the tip 60 of the contact portion 55 of the contact body 50 of the cutting height detecting device 30, the cutting height detecting device 30 during normal cutting height control can be used. The presence of the stopper mechanism 70 has no effect.
Since the stopper mechanism 70 is provided at a position where it can be fixed above the normal operating range of the tip 60 of the contact portion 55 of the contact body 50 of the cutting height detection device 30, the contact body 50 is centered on the first shaft 33. However, since the stopper 43 regulates the rotation in the counterclockwise direction, the cutting height detection device 30 is rotated counterclockwise while rotating the contact body 50 clockwise around the second axis 46. When rotated, the tip 60 of the contact body 50 passes the tip of the stopper mechanism 70, and when it passes, the tip 60 of the contact body 50 returns to the original position and engages with the stopper mechanism 70.

Therefore, in the stopper mechanism 70, the tip 60 of the contact portion 55 of the contact body 50 of the cutting height detection device 30 is located above the normal operating range and passes through the contact body 50 of the cutting height detection device 30. Utilizing the fact that the contact body 50 does not rotate counterclockwise when the contact body 50 is moved, the rotation range and the stopper in the clockwise rotation direction of the contact body 50 of the cutting height detection device 30 so as to engage with the stopper mechanism 70. Since the stopper mechanism 70 is provided in relation to the height position of the mechanism 70, the stopper mechanism 70 can satisfactorily hold the cutting height detection device 30 in the retracted position.
When the contact body 50 of the cutting height detection device 30 is held and fixed by the stopper mechanism 70, the contact body 50 is located above the normal operating range, and when this is detected by the detection device 58, the cutting height is detected. Since the automatic control of the cutting height by the device 30 is invalidated, it is possible to prevent erroneous detection of the cutting height detecting device 30 at the time of high cutting or the like.

In another embodiment of the stopper mechanism 70 of FIG. 10, a mounting portion 81 formed by being bent in the lateral direction is provided at the base of the main body portion 80 formed by a U-shaped piano wire, and is provided on the weed basin 40. Since the mounting portions 81 are rotatably mounted on the pair of left and right mounting plates 82, the cutting height detecting device is obtained by hooking the contact body 50 of the cutting height detecting device 30 on the U-shaped main body portion 80 of the stopper mechanism 70. 30 can be stored and held with a non-tool.
Since the left and right mounting portions 81 of the U-shaped main body portion 80 of the stopper mechanism 70 are mounted by changing the mounting positions on the mounting plates 82, a twisting action acts on the U-shaped main body portion 80 of the stopper mechanism 70. The stopper mechanism 70 is restricted from rotating downward to the center of the mounting portion 81, and the cutting height detection device 30 is stored and held.

In this case, of the plurality of weed culms 40 provided with the stopper mechanism 70 in the left-right direction, the weed culm 40 provided at the center is positioned above the passing position of the raising lug 85 of the raising device 8. Prevents the weed culm 40 from pushing down the grain culm in the field during turning.
Further, among the plurality of weed culms 40 provided with the stopper mechanism 70 in the left-right direction, except for the weed culm 40 provided on the uncut land side on the left side, the position is above the passing position of the raising lug 85 of the raising device 8. Therefore, the grass culm 40 is prevented from pushing down the grain culm in the field when turning, and the grounding of the grass culm 40 at the left end makes it easy for the operator to visually recognize the grounding of the cutting device 4.
Further, since the U-shaped main body portion 80 of the stopper mechanism 70 is provided inside the width of the weeding device 7, the presence of the stopper mechanism 70 does not affect the posture of the grain culm in the field, and the cutting height is detected. Prevents damage to the device 30 and the stopper mechanism 70.

Further, since the U-shaped main body portion 80 of the stopper mechanism 70 is provided so as to be located above the weeding guide 75, which is above the passing range of the grain culm, the passage range of the grain culm. Since the U-shaped main body portion 80 of the stopper mechanism 70 is located above the left and right weed guides 75, the presence of the stopper mechanism 70 does not affect the posture of the culm in the field.
Since the tip of the U-shaped main body portion 80 of the stopper mechanism 70 is provided above the lower straight portion 40A of the weed culm 40 parallel to the field scene, the presence of the stopper mechanism 70 is in the posture of the grain culm in the field. It does not affect the cutting height detection device 30 and prevents the stopper mechanism 70 from being damaged.

Since the U-shaped main body portion 80 of the stopper mechanism 70 is provided behind the tip portion 60 of the contact portion 55 of the contact body 50 of the cutting height detecting device 30, it is a rotation fulcrum of the cutting height detecting device 30. The uniaxial 33 makes it possible to regulate a reliable descent at a distance.
Since the U-shaped main body 80 of the stopper mechanism 70 is provided outside the normal operating range of the tip 60 of the contact portion 55 of the contact body 50 of the cutting height detection device 30, the cutting height during normal cutting height control The presence of the stopper mechanism 70 does not affect the detection device 30.
Since the U-shaped main body portion 80 of the stopper mechanism 70 is provided at a position where it can be fixed above the normal operating range of the tip portion 60 of the contact portion 55 of the contact body 50 of the cutting height detection device 30, the cutting height The stopper mechanism 70 can satisfactorily hold the detection device 30 in the retracted position.

Further, the U-shaped main body portion 80 of the stopper mechanism 70 is formed by a U-shaped piano wire, and the mounting portion mounting portion 81 is formed so as to be bent in the lateral direction at the base of the arm-shaped and U-shaped main body portion U-shaped main body portion 80. Since the mounting portion 81 is rotatably mounted on the pair of left and right mounting plates 82 provided on the weeding rod 40, the U-shaped main body portion 80 of the stopper mechanism 70 itself is elastically deformed. , The U-shaped main body portion 80 rotates around the mounting portion 81 to prevent the contact body 50 of the cutting height detection device 30 and the U-shaped main body portion 80 of the stopper mechanism 70 from being damaged.

In addition, although each of the above-mentioned Examples is illustrated and described individually or in a mixed manner for easy understanding, various combinations of these Examples are possible, and the configurations and actions are expressed by these expressions. Etc. are not limited, and of course, there are cases where a synergistic effect is produced.

1 ... Aircraft frame, 2 ... Traveling device, 3 ... Threshing device, 4 ... Cutting device, 5 ... Glen tank, 5 ... Glen tank, 6 ... Control unit, 7 ... Weeding device, 8 ... Raising device, 10 ... Cutting blade , 30 ... Cutting height detection device, 32 ... Case, 33 ... First shaft, 34 ... Shaft cylinder, 35 ... Bracket, 36 ... Mounting part, 37 ... Deformed part, 40 ... Weeding 杆, 41 ... Bending part, 42 ... space, 46 ... second axis, 49 ... spring, 50 ... contact body, 52 ... mounting part, 55 ... contact part, 56 ... mounting part, 58 ... detection device, 60 ... tip part, 70 ... stopper mechanism, 71 ... Mounting part, 72 ... Engaging part, 75 ... Weeding guide, 80 ... Main body part (U-shaped main body part), 81 ... Mounting part, 82 ... Mounting plate.

Claims (5)

A threshing device (3) is provided above the traveling device (2), a cutting device (4) is provided in front of the threshing device (3), and the cutting device (4) is used for weeding a plurality of culms in the field. The weeding device (7), the raising device (8) that causes the weeding culm, and the cutting blade (10) that cuts the root of the raised culm are provided, and the cutting device (4) is provided. ) Is provided at a predetermined position of the cutting device (4), and the cutting height detecting device (30) has a front portion of the case (32). The horizontal axis is rotatably attached to the weeding device (7) side by the first axis (33) in the left-right direction, and is rotated downward by the second axis (46) in the left-right direction at the rear part of the case (32). The base of the contact body (50) protruding rearward from the case (32) is rotatably attached so as to allow movement but restrict upward rotation, and the case (32) around the first shaft (33) is attached. ) Is provided in the case (32), and the tip of the contact body (50) is located between the case (32) and the weeding device (7) side. A stopper mechanism (70) having an engaging portion (72) that engages with (60) and holds it in the storage position is provided, and the stopper mechanism (70) lowers the contact body (50) with respect to the case (32). A combine having a configuration in which the case (32) is rotated upward around the first shaft (33) while being rotated so as to pass through the engaging portion (72) of the stopper mechanism (70) and engage with the culm. The combine according to claim 1, wherein the stopper mechanism (70) is provided within the left-right width of the weeding device (7). Front-rear weeding guides (75) are provided on the left and right sides of the cutting height detection device (30) and the stopper mechanism (70), and the stopper mechanism (70) is higher than the weeding guide (75). The combine according to claim 1 provided at a position. The combine according to claim 1, wherein the stopper mechanism (70) is provided behind the tip end portion (60) of the contact body (50). The stopper mechanism (70) is formed by providing a mounting portion (81) bent in the lateral direction at the base of a main body portion (80) formed by a U-shaped piano wire, and mounting the stopper mechanism (70). The combine according to any one of claims 1 to 4, wherein the portion (81) is rotatably attached to a pair of left and right mounting plates (82) provided on the weeding device (7) side.

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