JPH0330374Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a winding device that winds yarn after processing such as false twisting onto a bobbin, and in particular, it is used to check whether the yarn is properly wound onto the bobbin. The present invention relates to a yarn winding error detection device for detecting yarn winding errors.

[Prior Art] The present applicant previously proposed Japanese Patent Application No. 60-227476 (title of the invention: method and device for doffing a package in a yarn false twisting machine).

In winding up the false twisted yarn, the invention of this earlier application includes a fully wound package wound by a winding device;
The doffing cart automatically replaces the empty bobbin inserted in the peg stand, and the doffing cart automatically threads and cuts the thread during winding.

[Problems to be Solved by the Invention] However, in automatically performing the above-mentioned doffing work using a doffing cart, it is necessary to detect whether the thread is correctly wound onto the bobbin during winding.

The present invention was developed in consideration of the above circumstances, and an object of the present invention is to provide a thread winding error detection device that can automatically detect whether or not the thread is being wound correctly when winding it onto a bobbin. do.

[Means and operations for solving the problems] In order to achieve the above object, the present invention provides a thread winding device for supporting an empty bobbin and rotating the bobbin to wind the thread, and a thread winding device for winding the thread by rotating the bobbin. A thread hooking device includes a thread hooking arm that threads thread onto a bobbin of the thread winding device at the start of thread winding, and an optical fiber sensor that is provided on the thread hooking arm and detects changes in reflected light from bunch winding wound around the bobbin. This device is equipped with an infrared sensor that is installed in the threading device and irradiates the bobbin with infrared rays diagonally and detects the diffusely reflected infrared rays to detect the main winding. An optical fiber sensor installed on the winding arm detects whether the bunch winding has been performed normally, and then an infrared sensor irradiates the main winding thread with infrared rays diagonally and detects the diffusely reflected infrared rays. It can be detected whether the main winding has been performed normally.

[Embodiment] A preferred embodiment of the yarn winding error detection device of the present invention will be described below with reference to the accompanying drawings.

First, before explaining the present invention, the doffing device in the yarn false twisting machine of the prior application will be explained with reference to FIGS. 6 and 7.

FIG. 6 shows a side view of the yarn false twister. A long first heater 2 is provided upright on one side of the work space 1, and a plurality of yarn winding devices 3 are provided on the other side. Further, a creel 4 supporting a large number of yarn supply packages P ₁ is arranged at the back of the first heater 2, and a second heater 5 is installed at the back of the yarn winding device 3. A yarn cooling plate 6, a yarn guide device 7, and a false twisting device 8 are arranged in this order above the work space 1, and feed rollers 9, 10, 11 are provided below the first heater 2 and above and below the second heater 5, respectively. will be placed.

The yarn Y pulled out from the yarn supply package P ₁ passes through the first feed roller 9 and inside the first heater 2 from bottom to top, is bent by guide pins 12 and 13, and then diagonally along the yarn cooling plate 6. The yarn travels downward and is further introduced into a false twisting device 8 via a yarn guide device 7 .

The yarn Y leaving the false twisting device 8 is bent downward by the guide pin 14, passes through the second feed roller 10, descends inside the second heater 5, passes through the third feed roller 11 and the yarn guide 15, and then is transferred to the yarn winding device 3. and is wound up to form a wound package P ₂ .

The thread winding device 3 is provided with a total of 12 units, 3 stages up and down and 4 rows in the front- _rear direction in the plane of the drawing.
It is composed of a friction roller 17 that rotationally drives _P2 , a yarn guide 18 that guides the yarn Y, and other members. Reference numeral 19 denotes a suction pipe provided below the yarn winding device 3, which communicates with a blower (not shown).

In the work space 1, in front of the first heater 2,
A flat peg stand 20 is arranged. The stand 20 is made to be able to run in the front and back direction of the paper in FIG. 6 by having rollers 21 provided on its lower surface slide on rails 22 laid on the ground. The thread winding device 3 is fixed at a position facing the thread winding device 3. In addition, on the surface of the stand 20 facing the thread winding device 3, a total of 12 pegs 23 are planted horizontally in three rows vertically and in four rows in the front-rear direction in the plane of the paper, with equal intervals in the upper and lower directions and in the front and rear directions. An empty bobbin B is inserted into each peg 23. Another rail 24 is laid on the ground between the peg stand 20 and the line winding device 3, and a doffing cart 25 is placed on the rail 24.
is run by rollers 26 in the front-rear direction on the paper.

Although details are not shown, the doffing cart 25 cuts the yarn Y when the winding package P ₂ in the yarn winding device 3 is fully wound, and also cuts the yarn Y and moves the cradle arm 16.
Remove the winding package P ₂ from the peg stand 20, and at the same time remove the bobbin B from the peg stand 20.
is attached to the cradle arm 16, and the winding package _P2 is attached to the peg 23.

A thread Y is newly wound onto the empty bobbin B mounted on the cradle arm 16 using a thread hooking device 27 shown in FIG.

As shown in FIG. 7, the thread hooking device 27 is provided on the doffing cart 25 so as to be vertically movable in order to thread the thread winding devices 3 in three stages, upper and lower.

The thread hooking device 27 includes a thread shifting guide 28 for shifting the thread Y when winding is completed, and a cutter 29 for cutting the thread Y gathered by the thread shifting guide 28.
a suction nozzle 30 that sucks the fed yarn after cutting;
Distribution guide 3 that distributes each thread Y in the upper and lower 3 tiers
1, and a thread hooking arm 32 that moves the fed yarn sucked in by the suction nozzle 30 to the yarn winding device 3 and threads the yarn.

Threading by this threading device 27 is to move the thread Y of the fully wound winding package P ₂ to the thread guide 28.
After pulling the yarn Y toward the doffing cart 25, the cutter 29 cuts the yarn Y, and the suction nozzle 30 suctions and supports the yarn Y on the yarn feeding side. Next, thread hooking device 2
7 is moved up and down to the stage where the bobbin B is newly installed, and the thread Y being sucked in by the suction nozzle 30 is moved by the thread hooking arm 32 as shown in the figure to thread the thread onto the thread winding device 3. .

To explain this in more detail in FIGS. 3 to 5, the cradle arm 16 of the thread winding device 3 has a bobbin holder 3 that rotatably supports both ends of the bobbin B.
3 is provided, and a thread hooking section 34 consisting of a notch for threading is formed in the collar portion 33a of the bobbin holder 33.

The thread hooking arm 32 threads the thread Y across the collar portion 33a as shown in FIG. When the thread Y is rotated as shown in FIG. 5, the thread Y is threaded onto the thread hooking portion 34. After threading, the remaining thread on the suction nozzle 30 side is cut by a cutter (not shown) provided on the threading arm 32, and thereafter the thread on the yarn feeding side is wound onto the bobbin B.

Now, FIG. 1 shows the yarn winding error detection device of the present invention.

First, as described above, the thread Y is threaded onto the thread threading portion 34 of the collar portion 33a of the bobbin holder 33 by the thread threading arm 32, and then the thread Y is attached to the thread threading side end of the bobbin B in a bunch having a predetermined width l. A winding 35 is made, and then a main winding 36 is made in a predetermined traverse range A.

The thread hooking device 27 is provided with a sensor that detects the bunch winding 35 and the main winding 36.

This optical fiber sensor 38 is connected to the thread hooking arm 32.
It detects changes in scattered light and reflected light 37 from the bunch winding 35. Further, the infrared sensor 41 is provided on the board 39 of the thread hooking device 27,
The main winding 36 is irradiated with infrared rays 40a diagonally, and changes in the infrared rays 40b reflected from the main winding 36 are detected.

Next, the operation of this embodiment will be explained with reference to FIG.

First, when the threading is performed normally, the optical fiber sensor 38 receives the reflected light 37 from the bunch winding 35, and the detected value is detected almost simultaneously with the threading, as shown in graph a shown by the solid line in FIG. It is detected that the bunch winding 35 has been performed.

Next, when the bunch winding 35 is finished and the main winding 36 is performed, the infrared sensor 41 detects the reflected infrared rays several seconds after threading, as shown in graph b indicated by a dotted line in FIG. That is, before the main winding 36 is performed, the infrared rays 40a emitted from the infrared sensor 41 hit the bobbin B obliquely, so the reflected infrared 40b does not return to the sensor 41, but by performing the main winding 36, When the thread is wound to a certain extent, the thread covers the surface of bobbin B, so the infrared 40
The infrared rays 40b are diffusely reflected toward the sensor 41, and can therefore be detected by the sensor 41.

Further, the bunch winding 35 is detected by an optical fiber sensor 38, and the main winding 36 is detected by an infrared sensor 41, but since the detection points are close to each other, these are used to distinguish the reflected lights from each other.

Next, a case will be described in which the thread is not normally wound around the bobbin B due to a threading error.

When a thread threading error occurs, there are cases where both bunch winding 35 and main winding 36 are not performed, and cases where bunch winding 3
There are two cases in which only the main winding 36 is performed without step 5.

In the former case, there is no change in the detection values of the optical fiber sensor 38 and infrared sensor 41, and in the latter case, there is no change in the detection value of the optical fiber sensor 38, and only the infrared sensor 41 changes.

In the latter case, where only the main winding 36 is being performed, there is no problem with thread winding, but in the former case, the thread is erroneously wound in other places such as the bobbin holder 33, so this is stopped. There is a need.

As explained in FIGS. 6 and 7, the threading device 27
The sensors 38 and 41 provided in the doffing cart 25 are provided on the moving doffing cart 25, and on the other hand, the cutter 42 that cuts the yarn in the event of incorrect winding is connected to the yarn feeding package _P1 to the first yarn feeding package P1 as shown in FIG. It is provided between the feed rollers 9 of.

This cutter 42 is determined by the detected values from the sensors 38 and 41.
When operating, it is necessary to transmit the output signals of the sensors 38 and 41 to the cutter 42, but since the doffing cart 25 runs in the front and back direction in the paper as described above,
It is difficult to connect directly with electric cables, etc.

Therefore, these sensors 38 and 4 are installed on the doffing truck 25.
On the other hand, a push button switch 45 is provided which sends a signal 46 for operating the cutter 42 to the frame 44 on the yarn winding device 3 side, and the actuator 43 is activated when an error occurs. When activated, the push button switch 45 is pressed and the cutter 42 is activated to cut the thread.

In this case, the actuator 43 may be actuated by the detection value of only the infrared sensor 41 that detects the main winding 36, or the actuator 43 may be actuated by the detection value of the optical fiber sensor 38 only, or both. It may also be operated in either direction.

[Effects of the invention] As explained above, the invention provides the following effects.

(1) By providing an optical fiber in the threading arm and an infrared sensor in the threading device, errors in thread winding in both bunch winding and main winding can be detected.

(2) Since yarn winding errors can be automatically detected, yarn feeding can be stopped immediately in the event of an incorrect winding.
The operating rate of the yarn false twisting machine can be improved.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an embodiment of the present invention, Fig. 2 is a diagram showing the operating characteristics of the sensor in the present invention, and Fig. 3 is a diagram showing an embodiment of the present invention.
Figures 4 and 5 are diagrams for explaining how to thread the yarn onto the yarn winding device, and Figures 6 and 7 are diagrams showing the yarn false twisting machine of the prior application. In the figure, 3 is a thread winding device, 27 is a thread hooking device, 32
38 is an optical fiber sensor, 41 is an infrared sensor, and B is a bobbin.

Claims (1)

[Scope of utility model registration request] A thread winding device that supports an empty bobbin and rotates the bobbin to wind yarn; a thread winding device that has a thread winding arm that threads the bobbin of the thread winding device at the start of winding the thread; An optical fiber sensor is installed on the hooking arm to detect changes in the reflected light from the bunch wound around the bobbin, and an optical fiber sensor is installed on the threading device that irradiates infrared rays diagonally to the bobbin and emits the diffusely reflected infrared rays. A yarn winding error detection device characterized by comprising an infrared sensor that detects the main winding.