JPS5918B2 - Culm length detection mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a culm length detection mechanism in which a plurality of sensors are arranged side by side in the direction of the culm body so as to contact and swing the culm in an upright position.

Conventionally, the sensor is configured to swing in the direction along the stem culm transport direction, and there has been a problem that the upper sensor in particular may malfunction due to the influence of floating straw or the like.

In view of the above points, it is an object of the present invention to make it possible to detect culm length over as wide a range as possible, while suppressing malfunctions of the sensor due to floating straw without interfering with culm transfer.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

A pulling device 1 that pulls up planted stem culms in the field, a reaping device 2 that reaps the drawn stem culms, a horizontal conveying device 3 that merges the cut stem culms and conveys them to one side of the machine body, A vertical conveying device 5 that transfers the harvested stem culm to the feed chain 4Vc while changing its posture to a nearly horizontal position while conveying it rearward and upward, a threshing section 6 that threshes the harvested stem culm while holding and conveying it with the feed chain 4, and a threshing section. A waste straw processing unit (not shown), which discharges straw into the field without shredding it, is connected to a traveling machine base equipped with a crawler traveling device 7 in sequence. The combine harvester is configured to continuously harvest and process the stem culms.

The vertical conveyance device 5 is pivotally connected to the reaping frame 8 so as to be swingable around the oblique axis 2 on the rear side, and sends and receives the reaped stem culms from the horizontal conveyance device 3 by the expansion and contraction of the hydraulic cylinder 9. The structure is such that the insertion length of the stem culm into the threshing section 6, so-called handling depth, can be changed by changing the position.

The pulling device 1 is provided with a starting sensor S that swings by contact with the conveying stem culm, and a first, second, and third sensor 515S2t83 extending upward at a predetermined interval, and the starting sensor S, First, second and third sensors S1. S2. It is configured to detect the presence or absence of a stem culm and also detect the culm length by swinging S3.

Due to the swinging of the activation sensor S, the hydraulic cylinder 9
The main switch M of the operating circuit C of the electromagnetic valve V for
and the first, second and third sensors S1.
S2. The detected culm length based on the swinging state of S3 and the handling depth state based on the swinging angle of the vertical conveyance device 5 detected by the angle meter 10 are manually input to the comparing mechanism 11, and the operating circuit C is set based on the comparison result. It is configured to open for a predetermined time, operate the pulp V, supply a predetermined amount of pressure oil to the cylinder 9, and automatically change the handling depth according to the detected culm length.

The activation sensor S and the first sensor S1 are disposed below the lifting case 12 so as to be able to swing horizontally around a vertical axis in the stem culm transfer direction upon contact with the transferred stem culm. , so that there is no change in the culm length detection level due to rocking.

The second sensor S2 and the third sensor S3 are each configured to be swingable downward about the horizontal axis, with the lower end level being different in the vertical direction on the horizontal frame 13 that connects the upper part of the lifting device 1. It is constructed so that even if floating straw or the like gets caught, it will fall easily.

The present invention provides the above-mentioned culm length detection mechanism with the upper sensor S2. S3 is a downward sensor with the pivot axis facing sideways, and the lower ones S, S
1 is characterized in that it is a horizontally oriented sensor with the oscillation axis vertically oriented.

In other words, the upper sensor S2 is easily affected by floating straw and the like. By pointing S3 downward, floating straw, etc. can easily slide down without getting caught (this can prevent sensors S2 and S3 from malfunctioning due to floating straw, etc.), and lower sensors S, which are less affected by floating straw, etc. This avoids the situation where SL is placed horizontally and all sensors are directed downwards, which causes resistance due to the sensors and hinders stem culm transfer. While the culm length can be detected over a long period of time, malfunctions of sensors S2 and S3 due to floating straw, etc. can be suppressed as much as possible.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the culm length detection mechanism according to the present invention, in which Fig. 1 is a partially omitted side view of a combine harvester, Fig. 2 is a front view of the main part, and Fig. 3 is a main part showing the operation mode. FIG. S, S□...Landscape sensor, S2. S3...
...Downward sensor.

Claims (1)

[Claims] 1 A culm length detection mechanism in which a plurality of sensors S... which touch and swing on a stem culm in an upright position are arranged side by side in the direction of the culm body, and the upper one of the sensors S... S2. S3 is a downward sensor with the pivot axis facing sideways, and the lower ones S, Sl
is a culm length detection mechanism characterized by being a horizontally oriented sensor with the swing axis vertically oriented.