JPH0325541Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention consists of a knot part consisting of a knot bill, a string holder,
The present invention also relates to a stem culm tying device that is provided with a needle for supplying a tying string to the knot portion, and more specifically relates to a technique for setting the actuation timing of a knot bill, a string holder, a needle, etc.

[Conventional technology]

Conventionally, as shown in Japanese Utility Model Application Publication No. 59-119131, a stem culm binding device having the above-mentioned configuration has been used, for example, by connecting a needle with a uniaxial swing structure, a knot bill, and a string holder through a mechanically interlocking structure such as a gear. There is a system in which a mechanical interlocking system is constructed so that when the needle starts operating and reaches a predetermined swinging position, the knot bill and the string holder start operating.

[Problem that the invention attempts to solve]

Generally, as in the above-mentioned example, when the needle, knot building, and string holder are mechanically connected, long-term use can cause gear wear, misalignment of the transmission shaft, etc. Therefore, the knot bill and the string holder may each stop operating at the timing when the needle reaches a predetermined swinging position after the needle starts operating. In particular, in cases where the needles have a uniaxial swing structure, such as the one shown in the reference, the needles operate to embrace the stem culm during tying, which tends to cause play in the swing axis. Nodule building at the set timing,
The string holder sometimes stops working, causing poor binding, and an improvement has been desired.

An object of the present invention is to obtain, through reasonable modifications, a stem culm tying device that operates the knot bill and string holder as reliably as possible when the needle reaches a predetermined swinging position.

[Means for Solving the Problems] The present invention is characterized in that the stem culm tying device having the above configuration is provided with a mechanism for activating and stopping the knot building and the string holder, and that the needle A sensor is provided for detecting that the part has reached a predetermined position, and the sensor and the mechanism are linked so that the knot building and the string holder are actuated by a detection signal from the sensor. The action and effect are as follows.

[Effect]

If the above characteristics are configured as shown in FIG.
When the needle 5 reaches the position where it can be retracted,
Proximity switch S _A is turned on and operated by permanent magnet 14 provided at the tip of , and knot building 1 and string holder 2 are operated by the power of electric motor _DM linked to proximity switch S _A.

[Effect of idea]

Therefore, as mentioned above, by using a proximity switch as a sensor and using an electric motor as a mechanism for stopping the operation of the knot building and string holder, it is possible to ensure that the knot is knotted when the needle reaches a predetermined swinging position. A stem culm binding device in which the bill and string holder operate is obtained,
This resulted in a reduction in binding defects.

It should be noted that the same effect as described above can be obtained by using a sensor having a structure that makes contact with the needle, or by using a clutch as a mechanism for stopping the operation of the knot bill and string holder.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 2, a knot building 1, a string holder 2
A knot part A and a discharging arm 3 are arranged above the binding space B, and a needle 5 for supplying the binding string 4 to the knot part A and a packer 6 for feeding waste straw into the binding space B are provided. A waste straw binding device installed in a combine harvester as an example of a stem culm binding device, which is disposed below the binding space B and is provided with a door 7 for detecting that a certain amount of waste straw has been fed into the binding space B. Configure.

As shown in the figure, a threshing device 8 is mounted on the body of the combine harvester, and the waste straw from the threshing device 8 is passed through a clamping conveyance mechanism 9 and a conveyance chain 10 provided on the conveyance side of the picker 6. It is configured to be fed into the binding space.

Further, the clamping conveyance mechanism 9, the conveyance chain 10,
The police car 6 is constantly driven by the power from the driving part of the vehicle body, and the police car 6 operates in a loop-like trajectory.

As shown in FIG. 1, the needle 5 is interlocked with the driving part through a clutch 11, and when a certain amount of waste straw in the bundling space B is reached, the door 7 is swung by the pressing force of the waste straw. By doing so, clutch 1
1 is inserted and operated to actuate the needle 5.

The needle 5 is constructed as a uniaxial swinging type, and is moved in a reciprocating swinging motion via a crank mechanism 12.

As shown in the figure, the knot building 1 and the string holder 2 are each equipped with bevel gears 1a and 2a for input, and these bevel gears 1a and 2a are connected to a timing gear 13 partially formed with teeth 13a. When the timing gear 13 rotates once, the knot building 1 and the string holder 2 are each operated to knot, and the release arm 3 interlocked with the timing gear 13 is operated.

Further, the timing gear 13 is operatively connected to an electric motor _DM as a mechanism D for stopping the operation of the knot building 1 and the string holder 2, and is controlled by the electric circuit shown in the figure.

That is, the binding device is configured such that the knot building 1 and the string holder 2 are operated when the needle 5 starts operating and the needle 5 feeds the string 4 into the knot A. A permanent magnet 14 is provided at the tip of the needle 5, a magnetic sensing type proximity switch S _A is provided as a sensor S at a predetermined position of the node A, and the timing gear 13 is connected to the power supply circuit of the electric motor _DM . A cam-type switch 15 is provided which is turned off each time the switch 15 rotates, and a switching transistor 1 is connected in parallel with the switch 15.
6, and is further linked so that the transistor 16 is activated by a signal from a pulse generating circuit 17 which is activated when the proximity switch S _A is turned on.

Then, when the needle 5 starts operating and reaches the position shown by the imaginary line, the knot building 1 and the string holder 2 operate to form a knot in the string 4, and immediately after this, the knot is tied by the release arm 3. The waste straw bundles are released.

[Another example]

In addition to the above-mentioned embodiments, the present invention also provides a contact type switch S _C as a sensor S at the knot A, as shown in FIG. electromagnetic clutch
D _C is provided in a system branched from the transmission system that operates the needle 5 from the driving part, and furthermore, a rotary encoder 20 and a timing gear 13 are provided below the transmission of the electromagnetic clutch D _C. It may be configured such that when the switch S _C is operated, the electromagnetic clutch D _C is engaged and the binding operation is performed. The signal from the switch _SC and the signal from the rotary encoder 20 are input to the control circuit 21, and the control circuit 21 is configured so that when the switch _SC is operated, the timing gear 13 rotates once and then stops. Also good.

Further, according to the present invention, the sensor S can be configured to have a contact structure that mechanically interlocks with the operating part of the occlusal clutch.

[Brief explanation of drawings]

The drawings show an embodiment of the stem culm binding device according to the present invention, FIG. 1 is a diagram showing the drive system and electric circuit of the device, and FIG. 2 is a side view of the waste straw binding device.
FIG. 3 is a diagram showing another embodiment of the device. 1... Nodule building, 2... String holder, 4... String,
5... Needle, A... Nodule, D... Mechanism, S
...Sensor, D _M ...Electric motor, D _C ...Electromagnetic clutch, S _A ...Proximity switch.

Claims (1)

[Claims for Utility Model Registration] A stem culm tying device comprising a knot part A consisting of a knot building 1, a string holder 2, and a needle 5 for supplying a tying string 4 to the knot part A, which comprises: A mechanism D is provided to actuate and stop the knot building 1 and the string holder 2, and a sensor S is provided to detect when the needle 5 has reached a predetermined position in the knot A. Then,
To operate the knot building 1 and the string holder 2,
A stem culm binding device in which the sensor S and the mechanism D are linked. A proximity switch S _A is used as the sensor S, and
The stem culm binding device according to claim 1, wherein the mechanism D uses an electric motor _DM . The mechanism D is constituted by an electromagnetic clutch D _C interposed between a transmission system that operates the needle 5 and a transmission system that interlocks and connects the knot building 1 and the string holder 2. The stem culm binding device described in section.