JPH08100337A - Structure of pneumatic duct having end breakage sensor - Google Patents

Abstract

PURPOSE: To provide a pneumatic duct capable of fully detecting end breakages of all spindles in case of detecting the end breakage of a fine spinning frame by installing an end breakage detecting sensor in the pneumatic duct. CONSTITUTION: This pneumatic duct has an end breakage detecting sensor installed in the pneumatic duct of a fine spinning frame. A flute and yarn suction holes made on the pneumatic duct are connected with a yarn suction pipe and the yarn suction holes are all arranged on the upstream of the end breakage detecting sensor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in the structure of a pneumatic duct in which a yarn breakage detection sensor is installed in the pneumatic duct of a spinning machine.

[0002]

2. Description of the Related Art Usually, yarn breakage cannot be avoided during spinning by a spinning machine, and various devices for detecting the yarn breakage and notifying the holder how to hold it have been considered. Especially, a device for detecting a yarn breakage by providing a yarn breakage detection sensor in a pneumatic duct connected to a pneumatic box of a spinning machine and detecting a cotton break in the airflow in the pneumatic duct is used as an inexpensive and highly sensitive method. ing. (Japanese Patent Application No. 4-355428)

However, in the conventional yarn breakage detection utilizing the pneumatic duct, the yarn breakage detection sensor is installed in the pneumatic duct at the leeward position as close to the pneumatic box as possible. Since it is attached to a place that avoids obstacles such as
Especially in the terminal part near the pneumatic box, the fiber suction hole on the pneumatic duct connected from the flute through the fiber suction pipe may be downwind from the position where the thread breakage detection sensor is attached. No yarn breakage could be detected.

[0004]

In view of the above situation, the present invention is provided with a yarn breakage detection sensor that enables yarn breakage detection over the entire spindle during spinning operation and that saves labor and stabilizes yarn quality for a long period of time. The purpose is to provide a structure of a pneumatic duct.

[0005]

As a result of intensive studies to solve the above problems, in the present invention, in the pneumatic duct in which the yarn breakage detection sensor is installed in the pneumatic duct of the spinning machine, it is provided on the flute and the pneumatic duct. A structure of a pneumatic duct provided with a yarn breakage detection sensor, characterized in that the fiber suction holes are connected by a fiber suction pipe, and all the fiber suction holes are provided on the windward side of the yarn breakage detection sensor, Further, there is provided a fiber suction pipe in which the fiber suction pipe separates the fiber suction pipe and an extension pipe is connected to the separated portion.

When a yarn breakage occurs in the spinning machine, the fibers generated by the yarn breakage enter the fiber suction hole from the flute through the fiber suction pipe and are sucked into the pneumatic duct. It is collected by suction in a pneumatic box provided at the end of the spinning machine. As the fiber suction pipe connecting the flute and the fiber suction hole on the pneumatic duct, a rubber socket made of a material having an appropriate elasticity, for example, synthetic rubber is used.

The yarn breakage detection sensor installed in the pneumatic duct detects the cotton flies caused by the fibers caused by the yarn breakage in the pneumatic duct by a sensor. For example, it is described in Japanese Patent Application No. 4-355428. Items are collected with a cotton collecting part formed of hooks or clips.
When the sensor detects that the accumulated cotton reaches a certain amount, air is ejected to the hook-shaped part, or the clip-shaped part is opened to remove the accumulated cotton, and to collect new cotton wool. To do. Then, the number of yarn breakages is displayed from the operation interval.

In the present invention, all the fiber suction holes on the pneumatic duct are provided on the windward side of the yarn breakage detecting sensor. When a conventional pneumatic duct is used, it can be handled by newly installing only the fiber suction hole at the end near the pneumatic box where the yarn breakage detection sensor cannot detect the yarn breakage so that it is on the windward side of the yarn breakage detection sensor. . The fiber suction holes other than the terminal portion are usually left at the existing position and are located on the windward side of the yarn breakage detection sensor, so that they can be used as they are.

The fiber suction pipes that connect the flutes and the fiber suction holes on the pneumatic duct are usually the same in shape in one machine base. Therefore, when a fiber suction hole is newly installed in the existing pneumatic duct as described above, the pipe connecting the newly installed fiber suction hole and the flute will be newly manufactured in a shape suitable for it, which is an economical burden. Grows larger. Therefore, in order to obtain a suitable length, the existing fiber suction pipe is cut off at an appropriate position and an extension pipe is connected so as to obtain a predetermined length. Aluminum, copper, iron, synthetic resin or the like can be used as the material of the extension pipe. In this case, it is preferable that the end surface and the inner surface of the extension pipe are finished to be smooth in order to prevent the fibers from being caught. Further, in order to prevent leakage of sucked air at the joint portion, it is preferable to apply an adhesive or the like to the joint portion to seal it. A rubber socket is usually used as the fiber suction pipe. In this case, the inner diameter of the rubber socket is 0.5.
A pipe having a large size of 1 mm to 1 mm and a wall thickness of about 1 mm is suitable. The shape of the extension pipe is not limited to the straight pipe, but may be any shape for connecting the flute and the fiber suction hole provided on the pneumatic duct, for example, a curved pipe.

[0010]

In the present invention, all of the fiber suction holes on the pneumatic duct through which the fibers generated by the yarn breakage are sucked are provided on the windward side of the position of the yarn breakage detection sensor installed in the pneumatic duct. If it occurs, all the cotton wool due to the yarn break will pass the detection sensor, and the yarn break can be detected without leakage.

[0011]

EXAMPLES Examples will be described below. FIG. 1 is a perspective view showing an essential part of the pneumatic duct of the present invention, which is an improvement of the existing pneumatic duct. FIG. 2 is an external view showing a new fiber suction pipe in which an existing fiber suction pipe is separated and connected by an extension pipe. FIG. 3 is an external view showing an existing fiber suction pipe.

In FIG. 1, 1 is a pneumatic box installed at the end of a spinning machine, 2a and 2b are pneumatic ducts, 3a and 3b are flutes, and 4 is a yarn breakage detection sensor provided in the pneumatic duct ( Since 2a and 2b have the same structure, 2a will be described below). 5a, 5b
Is an existing fiber suction hole on the pneumatic duct, but in the present invention, the fiber suction hole 5 is located on the lee side of the yarn breakage detection sensor 4.
Instead of using a, the fiber suction hole 6 is newly provided on the windward side of the yarn breakage detection sensor.

Reference numeral 7 denotes a newly provided fiber suction hole 6 and flute 3a.
Is a new fiber suction pipe, and 8 is an existing fiber suction pipe. In FIG. 1, the flutes 3b, the fiber suction pipes 8 and the fiber suction holes 5b are existing configurations, and a large number of similar configurations are provided side by side on the pneumatic duct toward the windward (right side of the figure). It has a different structure (not shown). The new fiber suction pipe is the existing fiber suction pipe 8
The same pipe is separated into 9a and 9b, and the separated parts are connected by the extension pipe 10.

Next, the operation of the structure of the pneumatic duct constructed as described above will be described. When yarn breakage occurs in the spinning process, the yarn supplied from the roving yarn is sucked into the flutes 3a and 3b under the exit of the front roller (not shown),
After passing through the newly installed fiber suction pipe 7 and the existing fiber suction pipe 8, the new fiber suction holes 6 provided on the pneumatic duct 2a and the existing fiber suction holes 5b are respectively sucked into the pneumatic duct 2a, and as the cotton wool 11, the pneumatic fiber The airflow 12 in the duct 2a is taken and collected in the pneumatic box 1.

The existing fiber suction hole 5a at the end close to the pneumatic duct 1 was on the lee side of the yarn breakage detection sensor 4 as shown in FIG. In the present invention, the fiber suction hole 5a is closed, and a fiber suction hole 6 corresponding to the flute 3a is newly provided on the windward side of the yarn breakage detection sensor 4. As a result, all the fiber suction holes are provided on the windward side of the yarn breakage detection sensor 4.

Also, the newly installed fiber suction hole 6 and flute 3a.
As shown in FIG. 2, the new fiber suction pipe 7 for connecting the existing fiber suction pipes is separated from the existing fiber suction pipes 9a and 9b,
By connecting the extension pipe 10 in the meantime, it can be economically manufactured at low cost. It is advisable to apply the adhesive 13 to the joint portion to join it.

In the present invention, it goes without saying that the pneumatic duct itself may be newly manufactured.

[0018]

[Effect] According to the present invention, as described above, the yarn breakage detection sensor installed in the pneumatic duct can detect the yarn breakage without leaking over the entire weight, which is very effective in saving labor and improving the yarn quality. It is something to demonstrate. Further, it can be dealt with by easily and inexpensively improving the existing pneumatic duct.

[0019]

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a pneumatic duct of a spinning machine according to the present invention.

FIG. 2 is an external view of a new fiber suction pipe in which an existing fiber suction pipe is separated and connected by an extension pipe.

FIG. 3 is an external view of an existing fiber suction pipe.

[Explanation of symbols]

 1 Pneumatic box 2a, 2b Pneumatic duct 3a, 3b Flute 4 Thread breakage detection sensor 5a Existing fiber suction hole downwind from the detection sensor 5b Existing fiber suction hole upwind from the detection sensor 6 New fiber suction hole 7 New Fiber suction pipe 8 Existing fiber suction pipe 9a Separation part of existing fiber suction pipe 9b Separation part of existing fiber suction pipe 10 Extension pipe 11 Fly swab 12 Air flow in pneumatic duct 13 Adhesive

Claims (5)

[Claims] 1. In a pneumatic duct in which a yarn breakage detection sensor is installed in a pneumatic duct of a spinning machine, a flute and a fiber suction hole provided on the pneumatic duct are connected by a fiber suction pipe. Is provided on the windward side of the yarn breakage detection sensor, and the structure of the pneumatic duct is provided with the yarn breakage detection sensor. 2. The structure of the pneumatic duct provided with the yarn breakage detection sensor according to claim 1, wherein the fiber suction pipe is formed by cutting the fiber suction pipe and connecting an extension pipe to the cut portion. 3. A fiber suction pipe provided on a flute and a pneumatic duct, characterized in that the fiber suction pipe is separated and an extension pipe is connected to the separated portion. 4. The structure of the pneumatic duct provided with the yarn breakage detection sensor according to claim 1, wherein the fiber suction pipe is a rubber socket. 5. The fiber suction pipe according to claim 3, wherein the fiber suction pipe is a rubber socket.