JPH036048B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a pipe that forms a string supply path to a needle in a state where it extends from the vicinity of the string storage section to the vicinity of the binding section, and the opening on the side of the binding section is closed. The needle is provided facing the string passing hole of the needle, and pressurized gas is supplied from a jet nozzle to the end of the string supply side of the pipe, and the string is drawn out from the string storage section by the gas flow jetted into the pipe. The present invention relates to a method for threading a string through a binding device that sends the tied string through a pipe to a needle, and more specifically relates to a method for threading a string through a binding device mounted on a combine harvester, a binder, or the like.

[Conventional technology]

The above-mentioned string threading method is a recently developed string threading means.In this method, when it was first developed, the string was threaded by simply inserting the end of the string from the winding string into the pipe on the string supply side. (References not listed)

[Problem that the invention seeks to solve]

In addition, in the above method, since the string is sent along the flow of pressurized gas, it depends on the material of the string. Depending on the string made of smooth chemical fibers or the flexibility of the string, there will naturally be differences in the amount of pressurized gas supplied per unit time required for threading the string, as well as the flow rate of pressurized gas required. In order to accommodate a wide range of stringing conditions, it was necessary to have a sufficiently large capacity for the pressurized gas supply device, etc.

The present invention has been made in view of the above circumstances, and has an object to provide a method for threading a string without any inconvenience even when the amount of pressurized gas is small and the flow rate is low.

[Means for solving problems]

A feature of the present invention is that a head portion larger than the string diameter and smaller than the inner diameter of the pipe is formed at the tip of the string inserted into the supply side opening of the pipe.
And the effects are as follows.

[Effect]

As mentioned above, since the head is formed, when the tip of the string is inserted into the pipe and pressurized gas is supplied, even if the formed head is relatively small, the dynamic pressure of the pressurized gas will be applied to the back of the head. works and sends out the head even when the gas pressure is low.

In addition, since the pressurized gas acts on the tip, there is no stalling at the tip of the string that passes through the pipe, and even if the string is small in diameter and flexible, it prevents the string from clogging due to stalling in the pipe. Moreover, by forming the head, dynamic inertia is generated at the tip of the string when threading the string, and the feeding of the string becomes smooth.

〔Effect of the invention〕

Therefore, by simply forming a head at the tip of the string, it has become possible to thread the string smoothly without any inconvenience even when the amount of pressurized gas is small and the flow rate is low. Therefore, this also leads to the effect that the capacity of the pressure gas supply device, etc. can be reduced.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in Fig. 3, an engine 1 is mounted on the rear of the machine, a lifting device 3 and a reaping device 4 are mounted on the front of the machine, which runs on a pair of left and right running wheels 2, and harvested grain culms are tied on the right side of the machine. A binder is constructed by providing a binding device A for discharging.

As shown in FIG. 1, the binding device A is composed of a knot building 5, a string holder 6, a needle 8 for wrapping a binding string 7a around the grain culm, a rotary door 9, etc., and is located behind the working section of the machine. The harvested grain culms are tied together with a string 7a fed out from a rolled string 7 placed in the string storage part B of the machine, and the tied stem culms are discharged outside the machine by the rotation of the revolving door 9. It is configured.

Further, a supply side opening 10a and a binding part side opening 1 are provided between the string storage part B and the binding part C, that is, the tip string passing hole 8a of the needle 8 in the stop position.
A string supply path is formed by forming a string guide pipe 10 which is bent and formed.

The supply side opening 10a has a trumpet-shaped opening 1.
1a, and a member 11 integrally formed with a jet nozzle 11b formed laterally to the axis of the pipe 10 so as to blow gas from the direction of the opening 11a toward the axis along the axis. Further, a pipe material 12 attached to the outside of the nozzle 11b and a valve 13 attached to the cylinder head 1a of the engine 1 shown in FIG. 4 are connected through a flexible pipe 14. Then, as shown in FIG. 2, the tip of the string 7a from the winding string 7 is tied to form a head 7h smaller than the inner diameter of the pipe 10, and inserted into the pipe 10 from the opening 11a to form a cylinder. By supplying high-pressure combustion gas generated within the head to the nozzle 11b, the string 7a is inserted into the string passage hole 8a of the needle 8.

The valve 13 is opened by a lever 15, and the high-pressure combustion gas is supplied by operating the lever 14 after starting the engine 1. Inside, 16 and 17 are string brakes that apply braking force to the string 7a that is let out from the winding string 7, and tension the string 7a that is let out. It is a slack-taking rod. In addition, when threading a string through the pipe 10, from the winding string 7 to the string 7a
is pulled out in advance so that when the string 7a is pulled into the pipe 10, the string brake does not apply a braking force to the string 7a.

[Another example]

In this embodiment, combustion gas from the engine is used as the pressurized gas supplied to the nozzle 11b, but it is also possible to store the atmosphere pressurized by a compressor in an accumulator and supply this pressurized atmosphere to the nozzle 11b. good. Also, as shown in Figure 5, the string 7
To form the head 7h at the tip of the string 7a, a smooth outer head member 18 made of aluminum, plastic, etc. may be caulked to the tip of the string 7a.

[Brief explanation of the drawing]

The drawings show an embodiment of the method for threading a string through a binding device according to the present invention, and FIG. 1 is a schematic plan view showing the structure for threading the string, and FIG. 2 shows a state in which the string is inserted into a member forming a nozzle. 3 is an overall side view of the binder, FIG. 4 is a vertical side view of the cylinder head, and FIG. 5 is a sectional view showing another embodiment of the head. 7a... string, 7h... head, 8... needle,
8a... String hole, 10... Pipe, 10a...
Supply side opening, 10b... Binding part side opening, 11b...
...Ejection nozzle, B...string storage section, C...binding section.

Claims (1)

[Claims] 1. Pipe 1 forming a string supply path to needle 8
0 is provided extending from the vicinity of the string storage part B to the vicinity of the binding part C, with the binding part side opening 10b facing the string passage hole 8a of the needle 8, and the string supply side end of the pipe 10. In the string threading method of the binding device, the string 7a drawn out from the string storage section B is fed to the needle 8 through the pipe 10 by supplying pressurized gas from the jetting nozzle 11b to the section and using the gas flow jetted into the pipe. A method for threading a string through a binding device, which is carried out by forming a head 7h larger than the string diameter and smaller than the inner diameter of the pipe at the tip of the string 7a inserted into the string supply opening 10a of the pipe 10. 2. The string passing mechanism according to claim 1, wherein the head 7h at the tip of the string is formed by a knot of the string. 3. The string threading method according to claim 1, wherein engine combustion exhaust gas is used as the pressure gas ejected from the nozzle 11b.