JPH0528983Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a combine harvester, and more particularly, to a combine harvester in which a reaping device equipped with a cutting blade is provided at the front of the machine body so as to be movable up and down via an elevating device.

(Prior Art) Conventionally, in this type of combine harvester, a ground-contact sensor sled that detects the minimum cutting height of the reaping device is supported vertically swingably at the rear of the cutting blade at the bottom of the reaping device. , a plunge prevention mechanism is provided which operates a lifting device when the sensor sled swings upward to raise the reaping device; and when the sensor sled contacts the ground and swings upward, the lifting device is actuated. The reaping device is raised to prevent the reaping device from plunging into the soil.

(Problem to be solved by the invention) However, in the above-mentioned conventional device, there is no mechanism for setting the minimum cutting height of the reaping device, and therefore, for example, the type of crop to be harvested or the condition of the field cannot be adjusted. Even if it is desired to adjust the minimum cutting height of the reaping device according to the situation, the minimum height cannot be adjusted and there is a problem in that good reaping work cannot be performed.

The purpose of this invention is to prevent the reaping device from penetrating into the soil, while also allowing the minimum cutting height detection position of the reaping device to be adjusted to an arbitrary minimum cutting height depending on the type of crop to be harvested, field conditions, etc. To provide a combine harvester whose height can be adjusted and whose adjustment operation can be easily performed.

(Means for solving the problem) In order to achieve the above purpose, the present invention
In this combine harvester, a reaping device 5 equipped with a reaping blade 53 at the front part of the reaping device 5 is provided so as to be movable up and down via an elevating device 6. A ground-contact type sensor sled 13 that detects the minimum cutting height at which plunging into the soil is predicted is supported so as to be vertically swingable via an axis rod 12, and also swings vertically in conjunction with the sensor sled 13. The lifting device 6 is operated by the upward swinging of the actuating body 18.
to raise the reaping device 5, and raise the reaping device 5.
Sensor switch 1 that prevents the material from penetrating into the soil.
7, the sensor switch 17 is supported by an adjustment arm 23, and the adjustment arm 23 is provided so as to be rotatable about the swing center of the actuating body 18.
The adjustment arm 23
A regulating portion 24 is provided for swinging the actuating body 18 upward in accordance with the adjustment of the adjusting arm 23.
while holding the sensor sled 1 at any adjustment position.
3 is provided with an adjusting means for adjusting the minimum cutting height detection position of the reaping device 5.

(Function) With the above configuration, the ground type sensor sled 13
When the actuator contacts the ground and swings upward, the actuating body swings upward in conjunction with the sensor sled 13 to operate the sensor switch 17, thereby actuating the lifting device 6. The reaping device 5 can be raised to prevent the reaping device 5 from plunging into the soil, and the adjustment arm 23 can be rotated about the swing center of the operating body 18 to any desired adjustment position. By changing the position of the sensor switch 17 attached to the adjusting arm 23 and holding the adjusted position by the adjusting means,
and the regulating part 24 are rotated together to change the position of the sensor switch 17 and the regulating part 24 is simultaneously rotated.
4, the change in the regulating position of the actuating body 18, that is,
The ground height of the sensor sled 13 that is linked to the actuating body 18 can be adjusted.
The operating body 1 may be
8, that is, with the play width of the sensor sled 13 relative to the sensor switch 17 kept constant,
The minimum cutting height detection position of the reaping device 5 by the sensor sled 13 can be adjusted to any position, and as a result,
At any of the adjusted minimum mowing height detection positions, the upward swinging of the sensor sled 13 immediately causes the sensor switch 17 to operate with high sensitivity to operate the lifting device 6 to quickly move the reaping device 5. By raising and retracting, it is possible to prevent the reaping device 5 from plunging into the soil.

Moreover, since the play width of the sensor sled 13 with respect to the sensor switch 17 can be made constant at any of the adjusted minimum cutting height detection positions, during normal work, the sensor sled 13
Since the mowing work can be performed without the sensor sled 13 coming into contact with the ground, the durability of the sensor sled 13 can be improved by eliminating the dragging of the sensor sled 13 against the ground. Furthermore, the adjustment operation can be easily performed simply by changing the adjustment position of the adjustment arm 26.

(Example) Figures 1 and 2 show a general-purpose combine harvester, in which the machine 1 is moved by crawlers 2.
It has a screw-shaped handling barrel 31, and below the handling barrel 31 is provided a threshing device 3 having a net-like body 32 such as a crimp net, and a swinging sorting device 4, and a reaping device 5 is provided in front of the machine body 1. The threshing device 3 is supported via a hydraulic cylinder 6 so that it can be raised and lowered
A grain tank 7 for storing grains threshed by the threshing device 3 is provided on the side of the tank 7, and a driver's seat 8 and a driving operation section 9 are provided in front of the tank 7. is equipped with an engine 10.

The reaping device 5 includes a platform 52 having a header 51 for taking in uncut crops, a reciprocating cutting blade 53 attached to the front of the platform 52, and a crop raking blade disposed behind the cutting blade 53. It consists of a conveyor 55 connected to the rear of the drum 54 and the platform 52 and having a conveyor 56 for conveying the crops harvested by the cutting blades 53 to the threshing device 3, and a feeder house 57 covering the conveyor 56. A crop raking reel 58 is supported at the rear upper part of 52 via a hydraulic cylinder 59 so as to be movable up and down.

In this way, it is harvested by the cutting blade 53 of the harvesting device 5, scraped by the drum 54, and transferred to the conveyor 5.
The harvested grain culm conveyed and supplied into the threshing device 3 by the screw-shaped handling cylinder 31 in the threshing device 3
Threshing process is carried out by

Then, the processed material threshed by the handling cylinder 31 reaches the swinging sorting device 4 from the mesh body 32, and is sorted by the swinging sorting device 4, and the sorted grains are separated from the grains. It is supplied and stored in the tank 7, and straw waste etc. are discharged to the outside.

Accordingly, in the present invention, in the combine harvester constructed as described above, a mechanism 11 for preventing the reaping device 5 from plunging into the soil is provided as follows.

That is, as shown in FIG. 3 and FIG. 4, the thrust prevention mechanism 11
A horizontal shaft 12 is provided at the lower part of the platform 52 located immediately behind the cutting blade 53, and on the outer periphery of the horizontal shaft 12 is a ground-contact type sensor sled 13 having a width extending over the entire width of the cutting blade 53 as shown in FIG. The cylinder shaft 14 is supported so as to be vertically swingable, and a detection arm 15 is provided on the cylinder shaft 14 to protrude outward. An axis 16 is provided, the horizontal axis 16
A sensor switch 17 is provided on the outer periphery of the sensor switch 17 to extend the hydraulic cylinder 6 to raise the reaping device 5 and prevent the reaping device 5 from plunging into the soil.
This sensor switch 17 is supported by an adjustment arm 23 (to be described later), and a switch plate (operating body) 18 for turning on the switch 17 is supported on the horizontal shaft 16 via a cylindrical shaft 19 so as to be swingable in the vertical direction. In addition, an actuating arm 20 is provided to protrude radially outward from the cylindrical shaft 19, and the actuating arm 20 and the detecting arm 15 are connected via a rod 21, as shown by the imaginary line in FIG. As shown, when the sensor sled 13 contacts the ground, a detection arm 15 and a rod 2 that are linked to the sensor sled 13 are activated.
1 and the operating arm 20, the switch plate 18 swings upward, and the upward swing of the switch plate 18 causes the sensor switch 17 to move upward.
is turned on, the elevating cylinder 6 is activated, and the reaping device 5 is raised.

The thrust prevention mechanism 11 is provided with an adjusting means that can adjust the minimum cutting height of the reaping device 5 in several stages and can store the sensor sled 13 in a storage position within the platform 52.

This adjustment means includes rotatably supporting a cylindrical shaft 22 on the outer periphery of the horizontal shaft 16 separately from the cylindrical shaft 19, while supporting the sensor switch 17 and forming an adjustment arm 23. 23 is rotatably provided on the cylindrical shaft 22, and the adjusting arm 23 restricts the downward swinging of the actuating body 18, and the actuating body 18 is moved upward following the adjustment of the adjusting arm 23. A swinging rubber (regulating portion) 20 is provided, and a cylindrical shaft portion 23a is provided integrally with the adjustment arm 23, so that the adjustment lever 25 can be moved in the axial direction with respect to the arm 23 on the cylindrical shaft 23a. By swinging the adjusting lever 25, the adjusting arm 23 is swung about the horizontal shaft 16, and the sensor switch 17 and the contact rubber 2 are
4 are swung together, and this oscillation causes the actuating arm 20 to be swung vertically via the abutting rubber 24, thereby changing the regulation position of the actuating arm 20 by the abutting rubber 24, and at the same time Actuation arm 2
The sensor sled 13 is configured to change the position of the switch plate 18 and adjust the ground height of the sensor sled 13. That is, the height of the sensor sled 13 and the storage position of the sensor sled 13 can be adjusted by swinging the adjustment lever 25 without changing the relative movement between the sensor switch 17 and the switch plate 18. It is configured as follows.

Further, 26 is a guide plate having a guide groove 26a for holding the adjustment lever 25 at a desired adjustment position, and is provided on the side wall of the platform 52.
The adjusting position is maintained by locking a locking body 25a provided on the adjustment lever 25 into the engagement hole 26b of the guide groove 26a. Further, reference numeral 27 connects the locking body 25a of the adjustment lever 25 to the guide plate 26.
This is a spring that biases the body toward the side.

In this way, when adjusting the minimum cutting height position of the reaping device 5, the adjustment lever 25 is pushed toward the adjustment arm 23 against the spring 27, and
Release the engagement between the locking body 25a and the engagement hole 25b, and keep the adjustment lever 25 in the released state.
That is, via the adjustment lever 25, the adjustment arm 23
After swinging the adjustment lever 25 to an arbitrary adjustment position, it is sufficient to release the adjustment lever 25 and engage the locking body 25a with an arbitrary engagement hole 25b. By this adjustment operation, the sensor switch 17 attached to the adjustment arm 23 and the abutting rubber 24 swing together about the horizontal shaft 16, and this swing causes the actuating arm 20 to move through the abutting rubber 24.
The sensor sled 13 is swung vertically to change the regulated position of the actuating arm 20 by the contact rubber 24, and at the same time change the position of the switch plate 18 that is interlocked with the actuating arm 20.
By adjusting the ground contact height of the sensor sled 13, the sensor sled 13 can be adjusted to the storage position or to a desired minimum cutting height in several stages.

Thereby, depending on the crop to be harvested, the state of the field, etc., the minimum cutting amount of the reaping device 5 by the sensor sled 13 is maintained while keeping the play width of the operating body 18, that is, the sensor sled 13, with respect to the sensor switch 17 constant. The height detection position can be adjusted to any desired position. As a result, at any of the adjusted minimum cutting height detection positions, the upward swinging of the sensor sled 13 causes the sensor switch 17 to immediately operate with high sensitivity, and the lifting device 6
to quickly raise and retreat the reaping device 5,
It is possible to prevent the reaping device 5 from plunging into the soil, and the play width of the sensor sled 13 with respect to the sensor switch 17 can be prevented at any of the adjusted minimum cutting height detection positions. In other words, the operation of the sensor switch 17 by the sensor sled 13 can be performed with high sensitivity, which eliminates the drag of the sensor sled 13 on the ground and improves the durability of the sensor sled 13. The adjustment operation can be easily performed simply by changing the adjustment position of the adjustment arm 26. Furthermore, since the sensor sled 13 can be housed within the platform 52, the sled 13 can be used to push the soil and prevent the soil from entering the reaping device 5 when used in upland or paddy cultivation. This also improves its adaptability to upland and paddy fields.

Note that the adjustment lever 25 is provided near the driver's seat,
The adjustment arm 23 may be remotely controlled via a control wire or the like.

Further, in the embodiment shown in the figure, the conveyance device 55
The distance A between the conveyor 56 and the bottom wall 57a of the feeder house 57 is set to be narrower than the distance B between the handling cylinder 31 and the net-like body 32 of the threshing device 3. With this setting, when a foreign object such as wood or stone is taken into the platform 52 of the reaping device 5, the foreign object is transported into the conveying device 3 and transferred to the screw-shaped handling barrel of the threshing device 3. 31 and the net-like body 32, but instead the jam occurs between the conveyor 56 of the conveying device 5 and the bottom wall 57a of the feeder house 57 first. As a result, it is possible to reliably prevent damage to the screw-shaped handling cylinder 31 and the net-like body 32 caused by the foreign matter in the threshing device 3, which is more expensive than the conveying device 55 and difficult to repair and replace.

In addition, the rear driving drum 55a and the front conveying drum 55b, which drive the conveyor 56 of the conveying device 55, are immovably fixed to the feeder house 57, and the conveying drum 55
The fixing position to the supporting member in the feeder house 57 of b is set so that the distance C between the conveying drum 55b and the scraping drum 54 is the optimum interval for conveying the grain culm, while both the drums 55a, 5
A tensioning means consisting of a tension roller 60 for adjusting the tension of the conveyor 56 is provided in the middle of the conveyor 5b.

Furthermore, when attaching the conveyance drum 55b to the feeder house 57, a pair of supports 61 that rotatably support the conveyance drum 55b are provided, and each of these supports 61 is attached to the support member of the feeder house 57 mainly with fixing bolts 62. It is fixed by positioning bolts 63. and,
The support member has a screw hole into which the fixing bolt 62 is screwed, and a positioning bolt 6 centered around the screw hole.
A plurality of screw holes 64 to be screwed into the positioning bolts 63 are provided above and below the arc drawn by 3, and the screwing position of the positioning bolts 63 into the screw holes is selected depending on the amount of crops taken in. Conveyance drum 55
The distance A between the conveyance drum 55b, that is, the conveyor 56, and the bottom wall 57a of the feeder house 57 can be adjusted by swinging the fixing bolt 62 up and down using the fixing bolt 62 as a fulcrum.

Note that even when changing the vertical position of the conveyance drum 55b, the distance A between the conveyor 56 and the bottom wall 57a of the feeder house 57 is larger than the distance B between the handling cylinder 31 and the net-like body 32 of the threshing device 3. Furthermore, even if the position of the conveyance drum 55b is changed up or down, the distance C between the conveyance drum 55b and the scraping drum 54 hardly changes, and the optimum distance can be maintained. It is configured as follows. In such a configuration, the conveyance drum 5
Since the interval C between the raking drum 54 and the raking drum 54 is always the optimum interval, the grain culms can be inherited evenly and well, and the grain culms can be conveyed to the threshing device 3 uniformly and quickly. In addition, for example, for crops such as wheat, which allow the machine body 1 to run at high speed and which require a large amount of transport by the transport device 55, the transport drum 55b can be moved to the upper position to increase the transport amount. In addition, the conveyance drum 55b can carry out smooth conveyance of grain culms.
The conveyor 56 is immovably fixed to the feeder house 57 at a desired position, and the tension is adjusted by the tension roller 60 so that the tension is always constant. This prevents the conveyor 56 from falling off or coming off.

(Effects of the Invention) As described above, the present invention provides a grounding system that detects the minimum cutting height at which the cutting blade 53 is predicted to plunge into the soil at the lower part of the cutting device 5. The sensor sled 13 is supported via the shaft rod 12 so as to be able to swing up and down, and the sensor sled 13 is
The operating body 18, which swings vertically in conjunction with the above, is pivoted, and is operated by the upward swinging of the operating body 18, and operates the lifting device 6 to raise the reaping device 5, thereby reaping the harvest. A sensor switch 17 is provided to prevent the device 5 from plunging into the soil, and the sensor switch 17 is supported by an adjustment arm 23, and the adjustment arm 23 is rotatable about the swing center of the operating body 18. and is provided with a regulating part 24 on the adjustment arm 23 that restricts downward swinging of the operating body 18 and causes the operating body 18 to swing upward following adjustment of the adjustment arm 23,
Furthermore, since the adjustment arm 23 is held at an arbitrary adjustment position and an adjustment means is provided for adjusting the position at which the minimum cutting height of the reaping device 5 is detected by the sensor sled 13, the ground-type sensor sled 13 can be adjusted to the ground. , the actuating body 18 interlocked with the sensor sled 13 is swung upward to operate the sensor switch 17, thereby actuating the lifting device 6 to raise the reaping device 5 and start reaping. While being able to prevent the device 5 from plunging into the soil, the adjustment arm 23 can be rotated about the swing center of the actuating body 18 to change the position to an arbitrary adjustment position. By holding the position by the adjusting means, the adjusting arm 2
By rotating the sensor switch 17 and the regulating part 24 attached to the sensor switch 3 together, the position of the sensor switch 17 is changed and at the same time, the regulating position of the actuating body 18 by the regulating part 24 is changed.
The height of the ground contact of the sensor sled 13 can be adjusted in conjunction with the sensor switch 17 of the sensor sled 13.
The position at which the minimum cutting height of the reaping device 5 is detected by the sensor sled 13 can be adjusted to any position while keeping the play width constant. As a result, at any of the adjusted minimum mowing height detection positions, the upward swinging of the sensor sled 13 immediately causes the sensor switch 17 to operate with high sensitivity, actuating the lifting device 6, and raising and lowering the mowing device 5. The sensor sled 13 can be quickly raised and retreated to prevent the reaping device 5 from plunging into the soil. Since the play width with respect to the sensor switch 17 can be made constant, in other words, the operation of the sensor switch 17 by the sensor sled 13 can be performed with high sensitivity.
The durability of the sensor sled 13 can be improved by eliminating the drag of the sensor sled 13 on the ground.
This can be easily done by simply changing the adjustment position.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing one embodiment of the combine of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a longitudinal sectional side view of the thrust prevention mechanism, and Fig. 4 is a longitudinal sectional front view of the main parts. . 31...screw-shaped handling body, 32...reticular body,
53...Mowing blade, 55...Transporting device, 57...Feeder house, 57a...Bottom wall.

Claims (1)

[Scope of utility model registration request] In a combine harvester in which a reaping device 5 equipped with a cutting blade 53 is provided at the front of the machine body 1 so as to be movable up and down via a lifting device 6, the cutting blade 5 is installed at the lower part of the reaping device 5.
A ground-contact type sensor sled 13 for detecting the minimum cutting height at which the reaping device 5 is predicted to plunge into the soil is supported at a rear position of 3 so as to be vertically swingable via a shaft 12. While pivotally supporting the operating body 18 that swings in the vertical direction in conjunction with the sled 13,
A sensor switch 17 is provided which is operated by the upward swinging of the operating body 18, operates the lifting device 6 to raise the reaping device 5, and prevents the reaping device 5 from plunging into the soil. The switch 17 is supported by an adjustment arm 23, and the adjustment arm 23 is provided so as to be rotatable about the swing center of the operating body 18. A regulating portion 24 is provided for regulating the movement and swinging the actuating body 18 upward in accordance with the adjustment of the adjustment arm 13, and further holds the adjustment arm 13 at an arbitrary adjustment position. A combine harvester characterized by being provided with an adjusting means for adjusting the minimum cutting height detection position of the reaping device 5.