JPH0226924B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a string threading mechanism of a binding device mainly used for agricultural purposes.

[Conventional technology]

In a tying device, it is necessary to run the string led out from the winding string along a predetermined string supply path, but this string supply path is located inside the mechanical device or is bent, so it is difficult to manually operate the string. The work of threading the string through the cord was extremely troublesome, and there were cases where the cord was threaded through the wrong route.

Therefore, as a means to allow the string to pass through a predetermined string supply path without error and relatively easily, for example, as shown in Japanese Utility Model Application Publication No. 53-130152, there is a method near the winding string storage section. A string supply path extending from the tying device to the vicinity of the string supplying needle of the tying device is formed by a pipe, and a loop-shaped string movement guide is inserted through this pipe, and the end of the string paid out from the wound string is moved as described above. There is a method in which the string is held in a guide and then rotated to allow the string to pass from the inlet to the outlet of the pipe, or as shown in Japanese Patent Application Laid-Open No. 56-32206, the string is passed through the string supply path. Means formed of a guide roller and a pipe, and configured to have a string feed roller drivably provided at the starting end of the string supply path, so that the string fed out from the wound string is forcibly sent out by the drive roller and passed through the string supply path. is proposed.

[Problem that the invention seeks to solve]

However, in the former method using a string movement guide, it is necessary to perform an operation to attach the tip of the string to the string movement guide, an operation to rotate the movement guide, and an operation to remove the string passed through the pipe from the movement guide. Although a removal operation is required and the occurrence of threading errors is eliminated, it still takes considerable effort to thread the string.

Furthermore, with the latter method using a driven string feed roller, unlike the former method, there is no need to attach or detach the string to the string movement guide or to rotate the string movement guide, and threading the string itself does not require much effort. However, if the strings currently in use on the market, such as juute, hemp, or resin, are weak and have a weak elasticity, the middle of the string may bend, and the feeding force of the string feed roller cannot be transmitted to the tip of the string. If the string supply path is bent, the resistance to movement of the string increases and the above phenomenon becomes even more pronounced, making it impossible to thread the string through, which is not a practical method.

As mentioned above, methods have been proposed to save labor when threading strings, but none of them have yet been put to practical use because they still have difficulties in terms of operation or performance. The reality is that people are having to thread the string through the cables, which is a hassle.

The present invention has been made paying attention to such a situation, and the first object of the present invention is to effectively utilize the engine provided in the work machine itself to reliably and quickly perform a specified operation with simple operation. The object of the present invention is to provide a string passing mechanism capable of passing a string through a string supply path.
In addition to the above-mentioned object, the second invention also aims to further save labor in the entire stringing operation.

[Means for solving problems]

The lace threading mechanism according to the first invention is characterized in that the lace supply path is composed of a pipe, and explosive gas from the engine is injected and supplied into the pipe to generate a high-speed airflow in the pipe toward the exit side. In addition, the string threading mechanism according to the second invention is characterized in that, in addition to the characteristic structure of the first invention, the string feeding needle is located at the retracted stop position at the outlet of the pipe. It is located at a point facing the string passing hole at the tip of the cord.

[Effect]

According to the characteristic configuration of the first invention, when the tip of the string drawn out from a winding string or the like is inserted into the entrance of the pipe, and explosive gas from the engine is injected into the pipe, there is no flow inside the pipe on the exit side. A high-speed airflow is generated, and the string is carried by this high-speed airflow to the pipe outlet, where it flies out along with the airflow.

In this case, as a characteristic configuration of the second invention, if the pipe outlet is provided directly in the string passing hole of the string supply needle, the string that flies out from the pipe outlet along with the high-speed airflow is inserted directly into the string passing hole of the needle. be done.

〔Effect of the invention〕

As invented above, according to the first invention, the string inside the pipe is sent to the outlet side by the high-speed airflow flowing inside the pipe, so even a weak and flexible string can be
Furthermore, even if the string supply path is bent, the string can now be quickly guided through the pipe and guided out from a predetermined outlet.

The operation is as simple as inserting the tip of the string into the entrance of the pipe and injecting the engine's explosive gas, making threading the string simple and quick.

Moreover, the jet power of the explosive gas from the engine mounted on the gas is used to generate the high-speed airflow for feeding the string inside the pipe, so there is no need for a dedicated high-pressure gas source or compressor, and the It can be implemented with a simple and inexpensive structure that makes effective use of the equipped engine, and has great practical effects.

Furthermore, according to the second invention, since the string that comes out from the pipe outlet along with the high-speed airflow is directly inserted into the string passing hole of the needle, there is no need for the troublesome string passing through the needle, which further saves labor in the entire string threading operation. Now it is possible to make changes. Therefore, for example, when threading the string as the string is consumed during the tying operation, the lace threading can be completed easily and in a short time, which is effective in performing the tying operation efficiently.

〔Example〕

FIG. 2 shows a binder as an example of an agricultural machine equipped with a binding device.

This binder includes a weeding tool 1 that separates planted stem culms into objects to be reaped and objects not to be reaped, a lifting device 2 for moving the stem culms from this weeding tool 1 to the stem culms to be reaped,
A reaping device 3 for raising the stem culm, a device 4 for conveying the cut stem culm to one side of the machine body, and this conveying device 4
It has a binding device 5 that binds a set amount of stem culms from the plant and releases them to the outside of the aircraft body, a pair of left and right wheels 6, 6, an engine 7, a control handle 8, etc. It is configured to be driven.

As shown in FIG. 1, at the front of the traveling machine, a building 12 and a string holder 13 that constitute a knotting mechanism are provided in front of the convergence space 11, and the convergence space 1
A needle 14 for supplying a tying string to the tying mechanism is disposed on the rear side of the tying mechanism 1 to form a tying section 15.

A storage section 10 for storing a winding cord 9 is provided on the back of the transport device 4 of the traveling machine, and a pipe constitutes a cord supply path for guiding the cord 9a fed out from the winding cord 9 to the binding section 15. 16 are provided. and,
The inlet 16a of the pipe 16 through which the string is inserted is configured in a flared shape, and the outlet 16b of the pipe 16 is a string provided at the tip of the needle 14 waiting at a stop position at the rear of the convergence space 11. It is provided facing the through hole 14a.

Further, an on-off valve 18 is connected to the inlet 16a of the pipe 16 from the cylinder head 7a of the engine 7.
A gas injection channel 17 is provided for injecting and supplying the explosive gas guided through the pipe 16 into the pipe 16.
The opening/closing valve 18 is biased closed by a spring 19, so that the explosive gas can be led out to the gas injection channel 17 only while the operating lever 20 is swung against the spring 19. It's getting old.

Next, the string threading operation using the above configuration will be explained.

First, the string 9a let out from the winding string 9 is inserted into the inlet 16 of the pipe 16 by an appropriate amount without applying the string brake 21 and the deflection lever 22.
Insert into a. Next, the operating lever 20 is used to open the on-off valve 18, and engine explosion gas is injected and supplied from the gas injection flow path 17 to the inlet 16a of the pipe 16. As this high-pressure explosive gas is injected and supplied, a high-speed airflow is generated within the pipe 16 toward the outlet 16b, and the string 9a is sent by the high-speed airflow to the pipe 16.
6, jumps out along with the airflow from the outlet 16b, and passes through the string passage hole 14a of the needle 14 at the retracted stop position. In this way, the string brake 21 and the deflection lever 22 are applied to the string 9a passed along the predetermined supply path to set it in a predetermined binding operation supply state.

Incidentally, a detection switch 23 is attached to the operating lever 20.
is linked to detect that the opening/closing valve 18 is opened based on the operating position of the operating lever 20, and the detection switch 23 is connected to an operating circuit 26 of an alarm device 25 such as a buzzer via a timer circuit 24. It is linked to. The timer circuit 24 is automatically activated based on information from the detection switch 23 so that it starts operating when the on-off valve 18 is opened, and resets when the on-off valve 18 is closed. In addition, the operating circuit 26 is configured to activate the alarm device 2 when the time during which the on-off valve 18 is maintained open reaches a set time.
5 is configured to operate automatically based on information from the timer circuit 24, and if explosive gas is continuously supplied to the pipe 16 for a set period of time, the string is prevented from being damaged by gas heat. I'm trying to warn you.

[Another example]

In the configuration shown in FIG. 3, the gas injection flow path 17 is provided with a pressure accumulation tank 27 for accumulating explosive gas, and the pipe 16
Even if the engine 7 is small with a small displacement, the amount of gas necessary for threading the string can be supplied to the pipe 16 in a short time. Further, a sensor 28 is provided on the side of the winding cord storage section of the pipe 16 to detect the temperature at that point, and the operating circuit 26 of the alarm device 25 is configured to automatically turn on the alarm device 25 when the temperature detected by the sensor 28 reaches a set value. It is configured to be activated, and an alarm is issued based on temperature detection to prevent damage to the string due to gas heat.

[Brief explanation of drawings]

The drawings show an embodiment of the string passing mechanism of the binding device according to the present invention, and FIG. 1 is a sectional view of the string passing mechanism, and FIG.
The figure is an overall side view of the binder, and FIG. 3 is a sectional view showing another embodiment of the string threading mechanism. 7... Engine, 9a... String, 14... Needle, 14a... String hole, 16... Pipe, 16
a...Entrance, 16b...Exit.

Claims (1)

[Claims] 1. The string supply path is composed of a pipe 16, and the engine 7
The string threading mechanism of the binding device is configured to inject explosive gas into the pipe 16 to generate a high-speed airflow inside the pipe 16 toward the outlet 16b side. 2 The string supply path is configured with the pipe 16, and the engine 7
Explosive gas is injected into the pipe 16 to generate a high-speed airflow in the pipe 16 toward the outlet 16b, and the outlet 16b of the pipe 16 is
The string passing mechanism of the binding device is provided facing the string passing hole 14a at the tip of the string feeding needle 14 which is at the backward stop position.