JPH0117973Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention changes the harvested grain culm from an upright position to a sideways position, and by vertically swinging the device that conveys and supplies the grain to the rear threshing device, the handling depth in the threshing device can be adjusted. and the rear part of one of the pair of left and right lifting devices whose upper end rear parts are fixedly connected via a front-view gate-shaped frame, and the gate-shaped frame connects the one A contact element protrudes from one side into the movement path for the lifted grain culm to the conveying and feeding device and is capable of swinging backward when brought into contact with the lifted grain culm. This invention relates to a combine harvester equipped with a culm length detection sensor.

In combine harvesters, in order to smoothly and reliably transfer the grain culm from the hoisting device to the conveyance start end of the conveyor supply device without causing any disturbance in the posture of the grain culm or causing it to fall off, it is necessary to It is desirable to provide the part as close to the back (rear part) of the lifting device as possible, but in the above structure,
The sensor attached to the gate-shaped frame side is displaced rearward by an amount equivalent to the wall thickness of the gate-shaped frame support section than the sensor attached to the pulling device side, and generally,
Even when the lifting device is tilted backward from the lifting action surface, it is displaced backward, and as a result, the gate is located on the lower side of the conveyance side than the conveyance start end of the conveyance supply device. The type frame side sensor is
Grain culms that have been changed to a slightly sideways posture after being conveyed by the conveyance/feeding device are detected. Therefore, in the case of long culms, the tip side of the grain culms is oriented laterally to the sensor on the gate-shaped frame side. Since they were located far apart, the contact of the sensor on the gate-shaped frame side with the grain culm was uncertain, and the culm length detection of the long culm lacked accuracy.

In view of these points, the present invention uses a simple structural modification to smoothly and reliably transfer the grain culm from the lifting device to the conveyance start end of the conveyance supply device, while also ensuring the detection of the culm length of long culms. , the purpose is to be able to do it accurately.

In the combine harvester according to the present invention, the protrusion length of the contact of the sensor attached to the portal frame side into the movement path is set to be longer than the protrusion length of the contact of the sensor attached to the lifting device side. In addition, the width of the portion corresponding to the moving path when viewed from the front of the gate-shaped frame is wider than the moving path between the lifting devices.

That is, by configuring the protrusion length of the contact of the sensor on the gate-type frame side into the movement path to be larger than the protrusion length of the contact on the device-side sensor, the contact of the sensor on the gate-type frame side can be Since the sensor on the gate-shaped frame side is configured to be able to contact grain culms that are widely spaced apart in the lateral direction, only the contact of the sensor on the gate-shaped frame side has a large protruding length. Then, with simple and minimal structural modifications,
In order to smoothly and reliably transfer grain culms from the lifting device to the starting end of the conveying and feeding device, the starting end of the conveying and feeding device is raised and placed close to the back of the device. The side sensor is pulled up by the wall thickness of the gate-shaped frame support part and is located at the rear of the device-side sensor. This eliminates the poor contact of the contact with the grain culm in the gate-frame type sensor, and improves the grip on the long culm. The culm length can now be detected reliably and accurately. In addition, the grain culm has a shape like a hook with a large head, and by raising the inner width of the gate-shaped frame through which the grain tip passes and making it larger than the width between the devices, the transportation and supply of the grain culm is improved. Delivery to the device becomes smoother.

Since this gate-shaped frame is separate from the pulling device, there is also the advantage that its inner width can be selected and set according to the shape of the grain culm.

Hereinafter, an embodiment of the present invention will be described based on the drawings. At the front of the machine 3, which is equipped with a crawler traveling device 1 and a threshing device 2, there are 4 groups of weeding tools and a device for raising the planted grain culm into an upright position. A pre-harvesting process comprising a pair of left and right devices 5, 5', a device 6 for raising grain culms and reaping them, and a device 7 for changing the vertical position of the reaped grain culms to a horizontal position while conveying and feeding them to the threshing device 2. The sections 8 are arranged in a swingable manner, and the conveying and feeding device 7 is vertically oscillated around the fulcrum R of the reaping pre-processing section 8 near the end of the conveying process, so that the threshing device 2 can be A device configured to be able to adjust the handling depth and to detect the grain length of the raised grain culm; Hydraulic cylinder 9 that swings the supply device 7 up and down
The combine harvester is equipped with an automatic handling depth control device, and the upper end and rear portions of the pair of left and right lifting devices 5, 5' are fixedly connected via a gate-shaped frame 10 when viewed from the front. Furthermore, the culm length detection device is configured as follows.

That is, among the lifting devices 5 and 5', the rear portion of one of the lifting devices 5, which is located on the opposite side to the direction in which the grain culm is laid down by the conveying and feeding device 7, and the one of the lifting devices 5 and 5' are The grain culm is pulled up at the back side of the column 10A on the side of the lifting device 5, and protrudes from one side into the movement path A passing between the lifting devices 5 and 5' for the grain culm to the conveying and feeding device 7. By attaching two culm length detection sensors S each having a contact a that can swing backward when in contact with the sensor S, spaced apart in the vertical direction, the contact a of each sensor S can be moved back. In the oscillating state, the culm length of the raised grain culm is less than the height above the ground of the first sensor S ₁ at the lowest stage, and the height above the ground of the first sensor S ₁ is greater than the height above the ground of the second sensor S ₂ . Length less than the height, length above the ground height of the second sensor S ₂ and less than the ground height of the third sensor S ₃ , length above the ground height of the third sensor S ₃ and above the ground height of the fourth sensor S ₄ It is configured to detect whether the length is less than the height or the length is greater than or equal to the ground height of the fourth sensor _S4 .

Then, the contacts a, _a , _{a 3} ,
The protrusion lengths L ₃ and L ₄ of a ₄ into the movement path A are the same, and the contactors a and a of both sensors S, S, S ₁ and S ₂ attached to the pulling device 5 side ，
In addition to making the protrusion lengths L ₁ and L ₂ of a ₁ and a ₂ larger,
The width of the portion of the gate-shaped frame 10 corresponding to the moving path A when viewed from the front is configured to be wider than the moving path A between the lifting devices 5 and 5'. Both sensors S ₁ attached to the pulling device 5 side,
The protruding lengths L ₁ and L ₂ of the contacts a ₁ and a ₂ in S ₂ are configured to be the same.

Further, both sensors S ₁ and S ₂ on the side of the lifting device 5 and both sensors S ₃ and S ₄ on the side of the portal frame 10 are attached so as to be movable and fixed in the vertical direction with respect to the lifting device 5 and the support section 10A. It is attached to the brackets 11, 11', and is configured to be integrally changed in position by movement of the brackets 11, 11'.

In the figure, S ₀ is a control activation/deactivation sensor that detects the presence of raised grain culms in the moving path A and performs automatic handling depth control based on the detection results of the sensor S group. be.

According to the above configuration, the sensors S ₃ and S ₄ on the gate-shaped frame 10 side protrude rearward than the sensors S ₁ and S ₂ on the lifting device 5 side, and are in the middle of being conveyed by the conveyance supply device 7, that is, , due to the overturning effect,
Although the detection target is a grain culm whose tip side is moving far from the sensor group S, when the culm length of this grain culm is longer than the height above the ground of the gate-shaped frame side sensors S ₃ and S ₄ , The contacts a ₃ and a ₄ of the gate-shaped frame side sensors S ₃ and S ₄ come into contact with the tip side of the grain culm, and the length of the culm can be detected.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

The drawings show an embodiment of the combine harvester according to the present invention, FIG. 1 is a side view of the main part, FIG. 2 is an enlarged front view of the main part, and FIG. 3 is a partially cutaway enlarged side view of the main part.
FIG. 4 is an enlarged cross-sectional plan view of the main part. 2... Threshing device, 7... Conveyance supply device, 10...
...Gate frame, 5,5'...Lifting device, 10
A... Strut part, A... Moving path, S... Sensor for detecting culm length, a... Contact.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Adjusting the handling depth in the threshing device 2 by vertically swinging the device 7 that transfers and supplies the harvested grain to the rear threshing device 2 while changing the vertical posture of the harvested grain culm to a horizontal posture. The rear part of one of the pair of left and right lifting devices 5, 5' whose upper end rear parts are fixedly connected to each other via a front-view gate-type frame 10. , a support section 10 on the side of the one lifting device 5 in the gate-shaped frame 10;
A culm length having a contact element A that protrudes from one side into the movement path A for the raised grain culm to the conveying and supplying device 7 and is capable of swinging backward by contact with the raised grain culm, at each of the rear portions A and A. In a combine harvester equipped with detection sensors S, S, the contact a of the sensor S attached to the gate-shaped frame 10 side
The length of the projection into the movement path A is made larger than the projection length of the contact a of the sensor S attached to the pulling device 5 side, and the length corresponding to the movement path A when the gate-shaped frame 10 is viewed from the front. A combine harvester characterized in that the width of the portion is wider than the movement path A between the lifting devices 5 and 5'. 2 Sensor S attached to the lifting device 5 side and sensor S attached to the gate-shaped frame 10 side
The combine harvester according to claim 1, wherein the combine harvester is provided with two spaced apart vertically.