JPS6031460Y2 - combine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a combine harvester in which a culm length detection sensor is disposed in front of a culm pulling device and is configured to swing when it comes into contact with the culm.

In the above combine harvester, the sensor is arranged in front of the lifting device to detect the culm length at an early stage, so that desired mechanisms such as the handling depth change adjustment mechanism can be operated without delay. As shown in FIG. 5, in the conventional device, the lifting device bypasses the sensor 1 in a free state, such as simply protruding the sensor 1 into the culm passage A in front of the lifting device 2. Since the detour path C leading to the triggering path B of No. 2 was formed, the culm was likely to bend due to the contact reaction force against the sensor 1 due to its low bulk or small mass. or if the portion corresponding to the sensor level is bent, it will pass through the detour route C, resulting in a problem of detection failure.

The present invention aims to solve the above problems without increasing the size of the sensor and without causing troubles in passing through the bulky culm. a guide configured such that the tip of the sensor is positioned in the widthwise middle of the lifting path in the free state of the sensor, and that guides the raised shell culm by the lifting device to a contact position with the sensor in the free state of the sensor; It is characterized by being provided so that it can be elastically displaced in a direction away from the tip of the sensor.

In other words, even if the raised shell culm is low in bulk, low in mass, or bent, the guiding action of the guide guides it to the position where it contacts the sensor in a free state, ensuring that the sensor is in contact with the sensor. Since it passes by pressing and swinging, the conventional problem of poor detection caused by the bulk, mass, or shape of the raised shell culm can be solved.

Furthermore, in order to ensure that the raised culm comes into contact with the sensor as described above, it is conceivable to block the culm passage with the sensor in a free state by raising the length of the sensor and extending the route to the gold mine. However, in this case, the sensor becomes large, which is disadvantageous in terms of cost.

However, according to the present invention, the tip of the sensor is raised and positioned in the middle of the path in the width direction, and the sensor and the guide cooperate to close the culm path. There was no need to make it large, making it advantageous in terms of cost.

Furthermore, if the guide with the passage blocking function is made of a rigid body, it will be difficult to pass through the raised shell culm if it is bulky, causing problems such as stagnation. It is configured such that it can be elastically displaced in the direction away from the tip of the sensor by the pressing action of the culm passing through the guide.
Even if the volume of the raised shell culm is high, the passage width is expanded by the deformation of the guide, so the above-mentioned trouble of passing through the shell culm can be avoided.

EMBODIMENT OF THE INVENTION Below, the embodiment of this invention is demonstrated based on illustrative drawing.

The pre-processing section installed in the combine consists of a main body with a threshing device 4 mounted on a crawler-type traveling machine stand 3, and a frame body 5.
is extended forward, and the pulling devices 7a and 7b, which are configured to horizontally drive an endless chain (not shown) equipped with a plurality of culm locking and conveying claws 6, are pulled up to the left and right of route B. Place it in
The conveying claws 6 in the double raising devices 7a and 7b transport the planted culms.
. A device 10 that pinches and conveys the culm toward the rear of the machine, detects the root side of the raised shell culm facing the reaping device 8, and supplies the root side of the cut culm toward the starting end of the clamping and conveying device 10. A pair of left and right scraping wheels 11, 11 are attached to the frame 5.

The position on the conveyance start end side of the clamping and conveying device 10 is configured to be swingable in the direction of the culm around the horizontal axis The handling depth in the threshing device 4 is adjusted by changing the gripping position.

Mechanism 1 for detecting the length of the culm in the pulling device 2
2 and a fluid pressure cylinder 13 for swinging the clamping and conveying device 10, and a control valve 1 for the cylinder 13 based on the result of the detection mechanism 12.
A control device 15 for operating the culm 4 is provided to automatically change and adjust the handling depth based on the detection of the culm length of the raised shell culm.

That is, the culm length detection mechanism 12 includes a sensor 1 that swings backward in the aircraft body upon contact with the culm to detect the presence of the culm, and a sensor 1 that detects the presence of the culm as the sensor 1 swings. A culm length detecting device 17 is connected to a switch section 16 that transmits a signal, and as shown in FIGS. 2 and 3,
The three detection devices 17 are arranged above the right lifting device 7b with the sensors 1 arranged in parallel in the culm direction, and each sensor 1 is positioned in front of the lifting device 2. In order to perform culm length detection early, all detection devices 17
... are arranged in front of the right pulling device 7b.

Due to the fact that the sensor is placed in front of the lifting device, the situation that tends to occur when the lifting shell culm is low in volume, small in mass, or bent, that is, the lifting shell culm In order to prevent the situation where the part corresponding to the sensor level of the culm bypasses the sensor in the free state and passes behind it, the part corresponding to the sensor level of the culm raised by the lifting device 2 is moved to the sensor in the free state.・Move the guide 18 to the corresponding position to all sensor points.
It protrudes from the front surface of the left lifting device 7a in a state where it is opposed to the left lifting device 7a.

Furthermore, each of the above-mentioned sensors is made compact by making it relatively short so that its tip is raised in a free state and is located in the width direction middle of the path B, and the culm path created thereby In order to close the opening of the passage A, the guide 18 may be reversely installed near the tip of the sensor from the left pulling device 7a, that is, the guide 18 may be protruded into the passage A.

If the guide 18 is made of an elastic member such as rubber that can be elastically displaced in a direction away from the tip of the sensor, and if the raised shell culm is bulky, the guide 18 will be moved by its pressing action. , as shown by the imaginary line in FIG. 3, the passage A is expanded by being elastically displaced.

In addition, in order to prevent the switch portion 16 from being stuck in the shell, which is likely to occur due to the detection device 17 being raised and positioned in front of the device, a cover 19 is provided to cover it.
is set upright from the front of the right lifting device 7b.

The control device 15 includes the culm length detection device 17.
A culm presence/absence detection mechanism 20, which is activated by a contact sensor and a switch section similar to that of the above, is attached to the lower part of the left lifting device 7a, and becomes ready for operation based on a culm presence detection signal from this detection mechanism 20. Furthermore, when all the sensors in the culm length detection mechanism 12 swing, it is determined that the culm is longer than the standard, and the cylinder 13 moves in the direction of swinging the clamping and conveying device 10 toward the tip. When the control valve 14 is moved to the position where the sensor is operated, and only the two on the plant side of all sensors swing, it is determined that the grain culm length is standard and the control valve 14 is moved to the neutral position. If all the sensors become non-swinging, or only one of them closest to the plant base swings, it is determined that the culm is shorter than the standard, and the clamping and conveying device 10 is moved to the plant base side. The control valve 14 is operated to a position where the cylinder 13 is driven in the direction of rocking.

FIG. 4 shows another embodiment of the guide 18, which is a hollow plate made of an elastic member formed into a loop shape.

[Brief explanation of drawings]

The drawings illustrate embodiments of the combine harvester according to the present invention,
Figure 1 is a side view of the combine pre-processing section, Figure 2 is a diagram of the automatic handling depth control mechanism, Figure 3 is a sectional view taken along the line ■-■ of Figure 2, and Figure 4
The figure is a structural diagram showing another embodiment of the guide, and FIG. 5 is a conventional structural diagram corresponding to FIG. 3. 1...Sensor, 2...Triggering device,
18... Guide, B... Pulling route.

Claims (1)

[Scope of utility model registration request] This is a combine harvester in which a culm length detecting sensor is disposed in front of a culm pulling device 2, which is configured to swing by contact with the culm, and when the sensor 1 is in a free state, the tip of the sensor is pulled up and the path is determined. A guide 18 is provided at the tip of the sensor, and is arranged to be located in the middle in the width direction of the sensor B, and guides the culm lifted by the lifting device 2 to a position of contact with the sensor when the sensor is in a free state. A combine harvester characterized by being provided so as to be elastically displaceable in the direction of separating from the other.