JPS6029866Y2 - threshing equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a threshing device such as a combine harvester or an automatic threshing machine, which supplies husks through a feed chain.

The feed chain of a threshing device generally does not include a transmission in the transmission system and is configured to operate at a set constant transfer speed to transfer the husk. When the amount of grain culm supplied increases, the amount of grain culm to be processed becomes unbalanced with the transport speed of the feed chain, resulting in unhandled grain and poor threshing.

For this reason, as seen in Utility Model Application Publication No. 50-61, for example, a sensor has been installed at the starting end of the feed chain to detect the amount of culm and respond accordingly, and a sensor has been installed in the transmission path to the feed chain. A transmission is provided, and the transmission is operated to change speed based on the sensing operation of the sensor, and when the amount of shell culm increases, the transfer speed of the feed chain is reduced to reduce the residence time of the shell culm in the threshing device. The current method is to lengthen the time period to avoid unhandled items.

By the way, in the conventional system, the sensor that detects the increase or decrease in the amount of husk is installed only at the starting end of the feed chain mechanism itself, so the culm that has increased or decreased is sent to the threshing device and is already in the feed. There is a problem in that an unbalanced state is not detected until after the correlation with the chain transport speed has worsened, and as a result, correction of the feed chain transport speed is delayed and the intended purpose cannot be achieved properly.

Therefore, the present invention detects the change in the amount of shell culm before it is fed to the starting end of the feed chain, and adjusts the transfer speed of the feed chain to a state corresponding to the change before feeding. In order to prevent problems from occurring, the moving speed of the feed chain can be appropriately changed and adjusted according to the amount of shell culm supplied, even in the so-called manual operation where the shell culm is manually fed directly to the starting end of the feed chain. It is provided in this way.

That is, the present invention is provided with a sensor that detects the amount of culm stock to be supplied and a speed change means that adjusts the speed of the feed chain, and is designed to maintain the amount of culm supplied constant based on the detection signal of the sensor. The sensor of the threshing device configured to adjust the speed change means is a first sensor installed at the start end of the feed chain, and a first sensor installed at the start end of the feed chain in the stock conveyor chain that delivers and delivers the husk to the start end of the feed chain. and a second sensor installed at the end of the conveyance, and is characterized in that when either of the two sensors outputs a detection signal, the speed change means is adjusted to a lower speed side. be.

According to the present invention, it is possible to detect an increase in the amount of shell culms to be supplied at an early stage by the second sensor, change the feed chain to a corresponding transfer speed, and then supply a large amount of shell culms to the feed chain. Therefore, distant relatives can be effectively prevented from being left behind.

In addition, even when feeding culms directly to the starting end of the feed chain by hand without relying on the stock conveyor chain, the first sensor detects the amount of culm supplied and the feed chain responds to ensure that no unhandled parts are left behind. It has the advantage of being able to perform threshing work.

An embodiment of this invention having such characteristics will be described in detail below based on the drawings.

The drawing shows a threshing device of a combine harvester, and in Fig. 1,
1 is a handling room, 2 is a feed chain provided along the handling opening of the handling room 1, 3... is a presser plate provided opposite to the feed chain 2, and these presser plates 3...・
is movable and is biased toward the feed chain 2 side by springs 4..., and cooperates with this feed chain 2 to clamp and convey the culm at the stock base 5 side.

6 is stock transport chain, 7... is stock transport chain 6
The presser plate 7 is movable as a single unit, and is biased toward the stock conveying chain 6 by a spring 8, and works together with the chain 6 to remove the culm cut in the previous stage. The stock side is held and fed to the feed chain 2.

As mentioned above, a first sensor 9 using a microswitch is provided opposite to the presser plate 3 on the conveyance start end side of the feed chain 2, and a presser plate 7 on the conveyance end side of the stock conveyor chain 6 is provided.
A second sensor 10 is similarly provided opposite to.

The above-mentioned first and second sensors 9 and 10 are operated when the respective presser plates 3 and 7 are movable when they grip and convey more culms than a set amount.

That is, when these sensors 9 and 10 are operated,
This means that it has been detected that the amount of shell culms supplied to the handling chamber 1 is too large.

On the other hand, the aforementioned feed chain 2 is a variable speed motor (not shown)
The speed is adjusted based on the first and second sensors 9 and 10 described above so that the amount of culm supplied is stabilized.

FIG. 2 shows the control circuit of the feed chain 2.
The detection signals of the second sensors 9 and 10 are input to the motor speed control circuit 12 via the OR gate 11, and this control circuit 12 switches the speed of the variable speed motor 13 into two stages, high speed and low speed, based on the input signal. The motor 13 then drives the feed chain 2.

The aforementioned motor speed control circuit 12 is the first. The motor 13 is set to be driven at high speed when there is no signal from the second sensors 9, 10; Second sensor 9,1
0 outputs a detection signal, that is, stock number 5
When it is detected that the supply amount is too large, the motor 13 is driven at a low speed.

Therefore, the feed chain 2 is normally driven at a high speed by the motor 13, and the speed at this time is such that the culm supply amount is the set amount and normal threshing can be performed.

And the above-mentioned first. When either the second sensor 9 or 10 outputs a detection signal, the motor 13 is controlled to a low speed, and the feed chain 2 is slowed down to delay the feeding of the grain culm and maintain a constant amount of husk supply. stabilize.

By controlling the speed of the feed chain 2 in this way, good threshing can be achieved.

In the embodiments described above, the speed of the variable speed motor may be switched in two or more steps or in a stepless manner.

Further, a continuously variable transmission powder clutch or the like may be used in place of the variable speed motor.

Further, as the sensor, a photoelectric switch, a proximity switch', and other known sensors can be used.

[Brief explanation of drawings]

The drawings show one embodiment of this invention, with FIG. 1 being a partial front view of the threshing device, and FIG. 2 being a control circuit block diagram. 1... Handling room, 2... Feed chain, 3... Holding plate, 5... Stockholder, 9,1
0...Sensor, 13...Variable speed motor.

Claims (1)

[Scope of utility model registration request] A sensor for detecting the amount of shell culms to be supplied and a speed change means for adjusting the speed of the feed chain are provided, and the speed change means is adjusted based on the detection signal of the sensor in order to maintain the supplied amount of shell culms constant. The threshing device is configured such that the above-mentioned sensor is a first sensor installed at the starting end of the feed chain, and a first sensor installed at the starting end of the feed chain, and a first sensor installed at the starting end of the feed chain. and a second sensor installed at a terminal end, the threshing device being configured to adjust the speed change means to a lower speed side when either of the two sensors outputs a detection signal.