JPH0333285B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Conventional tying devices use door pressure to engage and actuate a one-turn clutch, thereby driving the knot and needle for tying. In other words, although the size of one bundle was kept constant, the moisture content of grain culms that are extremely lodged, grain culms that are wet from rainwater or morning dew, etc. is much higher than that of dry grain culms, so the moisture content of these grains differs. Binding grain culms to a certain size caused differences in drying time, which caused problems in collection and other post-processing.

Further, the structure of the constant pressure spring that senses the door pressure, the accompanying link mechanism, and various mechanisms for connecting and disconnecting the one-rotation clutch is extremely complicated, resulting in large weight and cost.

The present invention aims to improve the above-mentioned drawbacks, and includes a weight sensing device provided at the bottom of the converging section, and the weight sensing device is interlocked and connected to the needle and the nodule section so that they operate together. In addition, the binding operation of the needle and knot portion and the pulling operation of the packer are linked so as to be substantially synchronized.

The embodiment shown in the drawings will be described below. This binding machine is installed at the rear of the threshing device of a combine harvester to bind waste straw discharged from the threshing machine. is equipped with a packer 2, a needle 3 on which a string is hung during tying, and a door 4 which is biased to stand up by a bullet, and a building 5 and a holder 6 are located above the convergence part of the transmission case 1. ' is provided with a knot part surrounded by a knot guide 7, and a knot shaft 9 to which a cam 8 for driving the building 5 and the holder 6 is attached is interlocked with a timing shaft 10 for driving the needle 3 by a chain case on the ear side. The sweeper 11 is connected to the cam 8 by a pin, and is also connected to the knot case 13 by a swing arm 12.

Further, in the front part of the convergence part, there is an arm 15 fixed to the rotating shaft 14, and tines 16 pivotally connected to both ends of the arm 15.
16, and a cam 17 that hangs down from the bearing and has tines 16, 16 pressed against it by a spring.

Then, the front guide plate 18a and the rear guide plate 18b
The stacking plate 18 provided at the bottom of the convergence section between the
The weight sensing switch 23 provided on the support plate 22 faces the lower surface of the stacking plate 18.

The timing shaft 10 is interlocked with a single rotation shaft 25 through gears 24 and 24', and the single rotation shaft 25 is connected to an input shaft 27 via an electromagnetic clutch 26.

In the above-mentioned device, the scraper scrapes the waste straw into the collecting portion one after another, and as the amount increases, the winding springs 21, 21 are compressed, and when a predetermined weight is reached, the collecting plate 18 switches the weight sensing switch 23 to the second When pressed as shown in Figure b, the one-turn switch 28 disposed opposite the gear 24 comes into contact with the protrusion 29 and contacts a in the circuit shown in Figure 4, and in this state the weight sensing switch 23 is turned on. Therefore, the electromagnetic clutch 26 is engaged, and when the one-rotation shaft 25 starts, the one-rotation switch 28 leaves the protrusion 29 and switches to contact b, so the one-rotation shaft 25 continues to rotate.
When it makes one rotation, the one-rotation switch 28 switches to the contact a side, and the one-rotation shaft 25 stops.

Meanwhile, the police car 2 is moving the collected straw to the door 4.
At the same time, the needle 3 hooks the string, and when the knot is knotted, the sweeper 11 releases the bundle while removing the knot. When the aforementioned one-turn switch 28 switches to contact point a, the bundle release has finished, so the stacking plate 18
1 and 21 to return to the position of receiving the straw that rakes the raking body, and the weight sensing switch 23 is activated.
It's turned off.

Note that when the bundle is released, the door 4 collapses outward against the spring that urges it to rise, but immediately returns to the upright position once the bundle is released.

Next, other embodiments of the weight sensing switch will be explained in the fifth to fifth embodiments.
To explain Figure 6, in general, a combine harvester adjusts the handling depth before supplying it to a threshing machine for threshing processing, so the position of the tip of the straw discharged from the threshing machine is approximately constant, whereas the stock The position varies depending on the culm length of the grain culm.

Therefore, if the weight is sensed at one point in the convergence part, a long culm or a short culm cannot be measured at its center of gravity, but as shown in FIG. Switch 23', 23''
(consisting of potentiometers in this example), the weights detected by them are added by an adder 30, and the output e ₁ and the output e ₂ of the setting device 31 are compared by a comparator 32. The output of the adder 30 is the setter 3
When the set value e of 1 becomes larger than ₂ , an output is generated, which turns on the transistor 33, turns on the electromagnetic clutch 26, starts the one-rotation shaft 25, and turns on the one-rotation switch 28, as in the previous embodiment. After one rotation, the protrusion 29 turns OFF.

In addition, although the above-mentioned Example explained the example of tying waste straw to a combine harvester, it goes without saying that the present invention can also be applied to a reaping and tying machine.

As described above, the present invention provides a weight sensing device at the lower part of the converging section, and connects the weight sensing device to the needle and the knot so that they operate once, and also operates the needle and the knot in the binding operation. Since the raking operation of the bundler and the raking operation of the packer are linked so as to be substantially synchronized, the weight of the tied grain culm can be kept approximately constant regardless of whether the grain culm is wet or dry. In other words, wet grain culms with a higher specific gravity can be bundled into smaller bundles than grain culms with a lower moisture content, so that the drying time can be made approximately the same, and the grain culms can be efficiently collected and processed at the same time.

Further, the weight and cost of the machine can be significantly reduced without requiring a complicated door sensing mechanism or one-turn clutch mechanism as in conventional tying machines.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention,
Figure 1 is a side view of the binding machine, Figures 2a and b are side views showing the action of the weight sensing device, Figure 3a is a transmission diagram of the one-rotation drive unit, b is a side view of the same, Figure 4 is A circuit diagram of the electromagnetic clutch, FIGS. 5a, b, and c are operational diagrams showing another embodiment of the weight sensing switch, and FIG. 6 is a circuit diagram of the same electromagnetic clutch. 2...Piece car, 3...Needle, 9...Node shaft, 18...Integrator plate, 23...Weight sensing switch, 26...Electromagnetic clutch, 28...1 rotation switch.

Claims (1)

[Claims] 1. A weight sensing device is provided at the lower part of the convergence section, and the weight sensing device is interlocked and connected to the needle and the knot so that they operate once, and the binding operation of the needle and the knot and the scraping operation of the packer are performed. A binding machine characterized in that the binding machines are interlocked so that they are substantially synchronized.