JPS63160980A - Thread end detecting device for thread winder - Google Patents

Abstract

PURPOSE:To prevent production of a thread package without a thread end, by providing a control device, which outputting a signal when a thread guide is moved to a position near to a thread end forming position and the thread guide is in a state that no thread is fed thereto, and a display means which displays after receipt of the signal. CONSTITUTION:After the presence of a thread sensed by a piezo-electric element 12 is sent as a signal to an amplifying circuit 14, the signal is transferred to a computing circuit 15. Meanwhile, it is detected by a microswitch 13 that a thread guide 8 of a thread end forming rod 7 approaches a thread end forming position 2, and a signal therefrom is transmitted to the computing circuit 15. When the computing circuit 15 receives a signal from the microswitch 13, a signal is outputted if no signal from the piezo-electric element 12 is received. The signal is transmitted to a lamp 16 to light on the lamp 16. Thus, when a worker detects the unit of a thread winder where no thread end is formed, the unit is stopped to replace the bobbin.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tail thread detection device for a thread winding device with a tail thread forming device.

[Prior art and problems to be solved by the invention] There are various types of thread winding machines for forming thread and thread cages, and they can be roughly divided into types that wind the bobbin by bringing it into contact with a rotating drum. There is also a type that rotates the bobbin holder itself that supports the bobbin. In any type of thread winding machine, a tail thread forming device is sometimes installed, which is capable of winding the tail thread around one end of the bobbin prior to winding of the thread spool cage. When using the formed yarn cage in the next process, the rear end of the preceding yarn package is connected to the tip of the following yarn package, and the yarn supply in the next process is carried out from multiple yarn packages. This is to enable continuity over the entire range.

Therefore, if yarn packages are produced in large quantities and used continuously in accordance with such a system, it is required that tail threads be formed on all yarn packages wound by the winding machine. . However, in reality, although the ratio is low, all threads II? Currently, nine cages of yarn with a numerical coefficient of 1, for example, about 2% are wound without forming tail threads. If such yarn package cages without tail threads are passed on to the next process as they are, the supply of yarn will be interrupted in the next process, so conventionally, such yarn package cages without tail threads were discovered by manual inspection or passed to the next process. The light is sent back from the process and is rewound again by the winding machine to form a thread/mother cage with tail threads. Manufacturing a yarn cage by rewinding increases labor costs and other expenses, and also causes problems such as deterioration of yarn quality due to rewinding.

The present invention solves the above-mentioned problems caused by the inability to form tail threads in the conventionally known yarn winding machines equipped with a tail thread forming device, and solves the problem when threads are not formed. It is an object of the present invention to provide a tail thread detection device capable of detecting the formation of tsukuji prior to its formation.

[Means for solving problems]

The above-mentioned object of the present invention is to have a thread guide at one end for guiding the thread to the tail thread forming position of the bobbin, and the other end is pivotally supported on the frame of the winding machine to guide the thread guide to the tail thread forming position. a tail thread-forming rod that can be moved between positions proximate and remote; and a thread-forming rod mechanically coupled to the thread-forming rod to move the thread guide of the thread-forming rod between the two positions. A tail thread detection device for a winding machine having a tail thread forming device comprising a movable actuating bar, wherein the tail thread detecting device is located on a thread guide of said tail thread forming rod or in the vicinity of said tail thread forming position. a first detection means disposed at the tail yarn supplying position for detecting the presence or absence of yarn being supplied to the tail yarn supplying position and emitting a signal; and a thread guide of the tail yarn forming rod.

1 by detecting the movement of the do to a position close to the tail thread forming position.
8, and upon receiving signals from the first detection means and the second detection means, the thread guide moves to a position close to the tail thread forming position, and the thread is moved to the thread guide. A control device that issues a signal when the supply is not being supplied, and a display instruction means that receives the signal from the control device to display that the tail yarn is not formed and/or to instruct to change the operating conditions of the winding machine. This is achieved by a tail thread detection device of a winding machine with a tail thread forming device, which is characterized by comprising:

The first detection means may be of any type as long as it can detect the presence or absence of thread supply to the end thread supply position of the bobbin and issue a signal. For example, the placement of a piezoelectric element on the yarn guide of the tail yarn forming rod, the microswitch placed in contact with the trajectory of the yarn fed through the yarn guide, or the direction of the light beam towards the trajectory of the yarn fed through the yarn guide. A phototube that emits and a light receiver that receives the light from the phototube can be used.

A microswitch or the like may be used as the second detection means, and the microswitch may be arranged to detect movement of the tail thread forming rod to the tail thread forming position,
Alternatively, they may be arranged to detect movement of the corresponding actuation rod.

The display instruction means may be a display device such as a rung or budai operated by a signal from a control device, or a signal from the control device may be transmitted to a drive mechanism of a winding machine to drive a rotating drum. It may also be configured as a mechanism that stops and dots.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings showing an embodiment of a tail thread detection device for a winding machine according to the present invention.

FIG. 1 shows a unit of a winding machine of the type in which a bobbin 1 is rotated in contact with a rotating drum 5 having a traverse cam groove to form a four-thread cage.

As is well known, the bobbin 1 is fitted into a bobbin holder 3 rotatably supported on a cradle 4, and as shown in FIG. Provided at the front end.

The tail thread forming device of the winding machine shown in FIG.
It consists of a tail thread forming rod 7 pivotally attached to an upper pin 9, and an actuating rod 10 that rotates the tail thread forming rod 7 about the pin 9. One end 11 of the actuating rod 10 is pivotally connected to the tail string forming rod 7, and therefore, by moving the actuating rod 10 left and right as shown by arrow B, the tail string forming rod 7 is moved.
The thread guide 8 shown in FIG. 1 is rotatable between a position close to the tail thread forming position 2 and a position away from the tail thread forming position 2 by rotation in the direction shown by arrow A.

Next, the formation of the tail thread will be explained. That is, by pushing the actuating rod 10 (toward the front left side in FIG. 1), the tail thread forming rod 7J11 is rotated and the thread guide 8 approaches the tail thread forming position 2, and at this time, the thread is captured by the thread guide 8. , stay in that position.

When the thread starts running in this state, the thread is wound around the tail thread forming position 2 and a tail thread is formed. After the tail yarn is formed, the actuating rod O is pulled in the opposite direction, and as a result, the tail yarn forming rod 7 rotates and returns to its original position, and the running yarn is removed from the yarn guide 8, and from then on Winding is started.

The tail thread detection device shown in FIG. It comprises a microswitch 13 arranged so as to come into contact when moved closer to the yarn forming position 2.

The presence of the thread sensed by the piezoelectric element 12 is sent as a signal to an amplifier circuit 14, amplified, and then transmitted to an arithmetic circuit (control device) 15. On the other hand, micro switch 13
Therefore, the thread guide 8 of the thread forming rod 7 is in the thread forming position f.
2 is detected, and the signal is sent to the arithmetic circuit 15.
transmitted to. The arithmetic circuit 15 is configured to emit a signal when it receives a signal from the microswitch 13, and to emit a signal when it does not receive a signal from the piezoelectric element 12.
In the embodiment shown in FIG. 1, that signal is transmitted to the lamp 16, causing the lamp 16 to be turned on, thereby informing the operator that no tail threads have been formed. If the worker finds a unit of the winding machine with no tail thread formed, the worker stops that unit and replaces the bobbin so that winding with the tail thread is performed again from the beginning. In this way, it is possible to continuously produce thread cages while preventing the occurrence of thread cages without tail threads.

〔Effect of the invention〕

Since the tail thread detection device of the thread winding machine according to the present invention is configured as described above, it is possible to prevent the occurrence of thread T47 cages without a tail thread, and as a result, all the thread thread cages are treated as having tail threads. It can be sent to the next process. This is not just a fool's errand to help improve efficiency in the next process, but it also helps to prevent increased costs and deterioration in yarn quality due to one rewind.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one unit of a thread winding machine equipped with a tail thread detection device according to the present invention. DESCRIPTION OF SYMBOLS 1... Bobbin, 2... Tail thread forming position, 5... Drum, 7... Tail thread forming rod, 8... Thread guide, 10
... Actuation port rod, 12... Piezoelectric element, 13...
Microswitch, 15... Arithmetic device, 16... Lamp.

Claims (1)

[Claims] 1. Winding yarn onto a rotating bobbin placed in contact with a rotating drum or mounted on a rotating cylinder to form a yarn package; A tail thread detection device for a winding machine equipped with a tail thread forming device that first forms a tail thread winding layer on one end of the bobbin, wherein the tail thread forming device has one end thereof guiding the thread to a tail thread forming position of the bobbin. and a tail thread forming member having a thread guide that is pivoted to the frame of the thread winding machine at the other end and capable of moving the thread guide between a position close to and a position away from the tail thread forming position. a rod; and an actuation bar mechanically coupled to the tail thread forming rod to move the thread guide of the tail thread forming rod between the two positions; a first detection means disposed on the thread guide or in the vicinity of the tail thread forming position to detect whether or not the thread is being supplied to the tail thread supply position and to issue a signal; a second detection means that detects movement to a position close to the tail thread formation position and issues a signal; and upon receiving signals from the first detection means and the second detection means, the thread guide performs the tail thread formation. A control device that emits a signal when the yarn is moved to a position close to the yarn guide and the yarn is not being supplied to the yarn guide, and a control device that receives a signal from the control device to display the unformed tail yarn and/or the winding yarn. What is claimed is: 1. A tail thread detection device for a winding machine with a tail thread forming device, characterized in that it comprises a display instruction means for instructing a change in operating conditions of the machine. 2. The device according to claim 1, wherein the first sensing means is a piezoelectric element arranged on the thread guide. 3. The device according to claim 1, wherein the second detection means is a microswitch placed on the movement track of the actuation bar. 4. The device according to claim 1, wherein the display instruction means is a lamp.