JPH0364609B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a textile machine in which, when pulling out yarn wound around a bobbin, the set tension is maintained stably and the yarn is supplied, and the yarn is This invention relates to an electric yarn tensioning device that does not cause slack.

[Prior Art] Conventionally, tension applying devices having various mechanisms have been used or proposed to apply the necessary tension when pulling out a thread wound around a bobbin.

These tension applying devices usually apply tension mechanically to the thread, for example,
A method is used in which a thread wound around a bobbin is guided out against the tension of a spring or the gravity of a member, and the bobbin is sequentially rotated in order to unwind the thread depending on the amount of the drawn-out amount.

On the other hand, in recent years, there has been a demand for various operation controls around the bobbin, and various detection and displays such as the remaining amount of thread and thread breakage, and it is desired that the bobbin be provided with an even wider variety of functions. When installing these functions in bobbin peripheral equipment such as a bobbin carrier, rather than operating the various devices mechanically, it is necessary to install batteries or supply electrical energy by some means to operate the various devices electrically. Making the device drivable makes the device simpler and more compact, and can be expected to operate more stably.

If it is possible to utilize electrical energy in this way, it would be extremely advantageous to configure the yarn tension applying device described above to be electrically driven, and to provide an optimal configuration for this purpose.

In addition, with conventional thread tension applying devices that mechanically apply tension, when the thread stops being pulled out, etc.
Even if it is possible to unwind to a certain extent, it is usually not possible to unwind fully, so if the tension is maintained, it is often impossible to unwind the thread, and the thread often becomes slack. It is difficult to maintain constant tension. Therefore, it is effective to sufficiently unwind the yarn as needed in order to obtain stable yarn tension.

[Problems to be Solved by the Invention] The technical problem of the present invention is to obtain a yarn tensioning device that satisfies the above-mentioned requirements and is suitable for being electrically driven. An object of the present invention is to obtain an electric thread tension applying device which can perform unwinding and stably obtain a constant thread tension.

[Means for Solving the Problems] To solve the above problems, the electric yarn tensioning device of the present invention includes a bobbin support member that supports a bobbin, and a bobbin support member that is rotatably held around the bobbin coaxially with the bobbin support member. A thread tensioner comprising: an intermediate rotary body that is provided with rotational force by the pulling force of the thread by winding the thread unwound from the bobbin; and a fixing member that rotatably supports the bobbin support member and the intermediate rotary body. A bobbin support member that supports a bobbin, a fixed thread guide that guides the unwound thread from the bobbin, an intermediate rotating body that is coaxial with the bobbin support member, and a bobbin support member that supports the bobbin. and a fixing member that rotatably supports the intermediate rotary body, a return spring that applies a return force to the bobbin support member against the rotational force that occurs when the thread is pulled out; A sensor that operates when a certain amount of rotation is applied to the bobbin support member against the biasing force of the return spring, and a sensor that rotates based on the output of the sensor to rotate the bobbin support member in the thread payout direction. It is constructed by providing a motor to

The above device also includes a sensor that operates when a certain amount of rotation is applied to the intermediate rotating body to absorb yarn slack due to the biasing force of a return spring, and a sensor that operates based on the output of the sensor. A motor for rotating the bobbin support member in the yarn rewinding direction can also be provided.

[Operation] When a pulling force is applied to the thread with the motor stopped, the thread pulling force applies rotational force to the intermediate rotating body or the bobbin support member, causing them to rotate against the force of the return spring. It turns out. When this rotation reaches a certain amount, the thread feed limit switch as a sensor operates and the motor rotates, so the thread is drawn out from the bobbin, but at the same time, the intermediate rotation given by the thread Since the rotational force on the body is reduced, the intermediate rotating body is given a tendency to return due to the biasing force of the return spring, and when the thread feed limit switch returns, the motor stops. However, when the yarn continues to be pulled out, the yarn feed limit switch operates again and the motor rotates in the forward direction.

The slack in the thread when the thread has stopped being pulled out is corrected by the return rotation of the intermediate rotating body to some extent by the return spring.
The yarn is removed by being pulled back, but when the slack cannot be absorbed by this, the rotation of the intermediate rotating body by the force of the return spring operates the rewind limit switch as a sensor.
The motor rotates in reverse and its unwind limit switch returns to unwind the bobbin until the motor stops rotating, thereby unwinding any slack in the thread. As a result, even when the next thread is drawn out, a substantially constant thread tension is applied from the beginning.

[Embodiment] FIGS. 1 to 3 show a first embodiment of an electric yarn tension applying device according to the present invention.

This thread tension applying device is capable of stably maintaining a set tension when pulling out a thread wound around a bobbin in a textile machine, and also allows the tension to be set or changed arbitrarily.

To specifically explain its configuration, the solid member 1
usually constitutes a part of a bobbin carrier or is attached to a bobbin carrier, etc., and a bobbin 4 with thread 3 wound thereon and a bobbin support member 5 are supported by a support shaft 2 erected on this fixed member 1. is rotatably supported, and a cage-shaped intermediate rotating body 8 coaxial with the fixed member 1 is rotatably supported on the fixed member 1. The bobbin 4 and the bobbin support member 5 are joined via the engagement unevenness 6, so that only the bobbin can be freely attached and detached, but the two may be integrated.

The intermediate rotation 8 is provided with a large number of guide rods 9 around it, as well as thread guides 10 and 11 as appropriate, and after winding the unwound thread 3 from the bobbin 4 around one guide rod 9, 10 and 11, and as explained below, when a pulling force is applied to the thread 3 while the rotation of the bobbin 4 is restrained, the pulling force applies a rotational force to the intermediate rotating body 8. It will be given to you.

Further, a return spring 14 is installed between the intermediate rotating body 8 and the fixed member 1 to apply a return force to the intermediate rotating body against the rotational force applied to the intermediate rotating body due to the tension caused by the pulling out of the thread 3. There is. In order to adjust the return force of the return spring 14, the return spring 14
It is sufficient that the position of the attachment end of the spring to the fixing member 1 can be adjusted to change the support point of the spring, or the strength of the return spring 14 can be adjusted.

On the other hand, a motor 16 for rotating the bobbin support member 5 is mounted on the fixed member 1. This motor 16 is driven to rotate by a rechargeable battery 17 housed in the fixed member 1, and a worm 18 provided on its rotating shaft is
Worm wheel 1 provided on bobbin support member 5
It meshes with 9. In such a configuration, rotation is not transmitted from the worm wheel 19 to the worm 18, so when the motor 16 is not driven, the bobbin 4 and the bobbin support member 5 are in a state where rotation is restrained, and the motor 16 The bobbin 4 is rotated by the rotational drive.

A yarn feed limit switch 21 and a rewind limit switch 22 are provided at required positions on the fixing member 1 as sensors for detecting the rotational position of the intermediate rotating body 8. These switches 2
1 and 22 are actuated by detecting contact with detection elements 23 and 24 such as protrusions provided on the intermediate rotating body 8 when a certain amount of rotation is applied to the bobbin support member; The thread feed limit switch 21 is
This operation causes the motor 16 to rotate in the forward direction, that is, the thread 3
The rewind limit switch 22 rotates the motor 16 in the rewinding direction, and the rewind limit switch 22
is rotated in the opposite direction, that is, in the direction of rewinding the thread 3.

In the illustrated embodiment, the protrusions constituting the detection elements 23 and 24 described above are formed by protruding a part of the guide rod 9 of the intermediate rotating body 8, but it is also possible to use protrusions that are separately configured. It is also possible to attach the limit switches 21 and 22, and in order to adjust the operating positions of the limit switches 21 and 22, these attachment positions can be made variable. Further, as described above, when the sensor is a limit switch, the detection elements 23, 2
As 4, a protrusion as shown is used,
Depending on the type of sensor, it is necessary to use a detection element with a corresponding structure.

In the electric thread tension applying device having such a configuration, when a pulling force is applied to the thread 3 while the motor 16 is stopped, the rotation of the bobbin 4 and the bobbin support member 5 is restricted, so that the thread 3 is As a result, a rotational force is applied to the intermediate rotating body 8, which rotates against the force of the return spring 14. This rotation causes the detection element 23 to approach the thread feed limit switch 21, but until a certain amount of rotation is reached, the detection element 23 approaches the thread feed limit switch 21.
1 cannot be operated, the motor 16 does not rotate, and only the length of yarn that is unwound while the intermediate rotating body 8 rotates against the force of the return spring 14 is led out.

Further rotational force acts on the intermediate rotating body 8 by pulling out the thread 3, and when the amount of rotation reaches a certain amount,
In order for the detection element 23 on the intermediate rotating body 8 to come into contact with the yarn feed limit switch 21 and operate it,
The motor 16 rotates forward, causing the bobbin 4 to rotate from the worm 18 via the worm wheel 19.
As a result, the thread 3 is drawn out from the bobbin 4, but at the same time as the thread 3 is drawn out, the rotational force applied to the intermediate rotary body 8 by the thread 3 decreases, so that the return spring 14 is applied to the intermediate rotary body 8. When the returning tendency is applied by the biasing force and the detecting element 23 returns the yarn feed limit switch 21, the motor 16 stops. However, when the thread 3 continues to be pulled out, the thread feed limit switch 21 operates again.
The motor 16 will rotate in the forward direction.

When the thread 3 stops being pulled out, even if there is some slack in the thread, the intermediate rotating body 8 returns the spring 14.
As a result, the thread 3 is rotated back to some extent and the thread is pulled back accordingly, so that the slack in the thread 3 is removed. When the rotation of the intermediate rotary body 8 by the return spring 14 cannot absorb the slack of the thread 3, the rotation of the intermediate rotary body 8 by the force of the return spring 14 causes the detection element 24
operates the rewind limit switch 22, so the motor 16 rotates in the reverse direction, causing the worm 18 to rotate the bobbin 4 in the reverse direction via the worm wheel 19. Therefore, the bobbin 4 is rewound until the rewind limit switch 22 returns and the rotation of the motor 16 stops, thereby rewinding all the slack in the thread 3. As a result, even when the next thread is drawn out, a substantially constant thread tension is applied from the beginning.

In order to adjust the tension of the thread 3, the tension of the return spring 14 may be adjusted or the mounting positions of the detection elements 23 and 24 may be adjusted.

FIG. 4 and FIG. 5 show a second embodiment of the present invention. In this electric thread tensioning device as well, the fixing member 31 constitutes a part of the bobbin carrier, as in the first embodiment, and Alternatively, it is attached to a bobbin carrier or the like.

On this solid member 31, a support shaft 32 is provided.
A bobbin 34 on which a thread 33 is wound and a bobbin support member 35 are rotatably supported, and an intermediate rotating body 38 coaxial with the bobbin support member 35 is rotatably supported. The bobbin 34 and the bobbin support member 35 are joined via the engagement unevenness 36, so that only the bobbin can be freely attached and detached, but they may be integrated.

In order to guide the unwound thread 33 from the bobbin 34, a guide arm 3 is attached to the fixing member 31.
9 have been set up. This guide arm 39 has a small roller 40, a guide 41, etc., through which the thread 33 is led out, and the thread 33 is guided out while the rotation of the bobbin 34 is restrained.
When a pull-out force is applied to the bobbin 34 and the bobbin support member 35, the pull-out force applies rotational force to the bobbin 34 and the bobbin support member 35.

Between the intermediate rotating body 38 on the support shaft 32 and the guide arm 39 attached to the fixed member 31, a restoring force is applied to the intermediate body 38 against the rotational force acting on the intermediate body 38 as the thread 33 is drawn out. Return spring 4 to be activated
4 is installed. Adjustment of the return force of the return spring 44 is performed by adjusting the return force of the return spring 44 as in the case of the previous embodiment.
The mounting position of the spring 44 can be adjusted to change the support point of the spring, or the spring 44 can be returned by an appropriate means.
It is only necessary to make the strength adjustable.

On the other hand, a motor 46 for rotating the bobbin support member 35 is mounted on the intermediate rotating body 38.

This motor 46 is rotatably driven by a rechargeable battery 47 housed within the fixed member 31, and a worm 48 provided on its rotating shaft is
It meshes with a worm wheel 49 provided on the bobbin support member 35. With this configuration, rotation is not transmitted from the worm wheel 49 to the worm 48, so when the motor 46 is not driven, the bobbin 34 and the bobbin support member 35 are restrained from rotating relative to the intermediate rotating body 38. Therefore, the bobbin 34 and the bobbin support member 35 rotate within the range in which the intermediate rotating body 38 can rotate against the return spring 44.

On the fixed member 31, a yarn feed limit switch 51 and a rewind limit switch 52 are provided at required positions as sensors for detecting the rotational position of the intermediate rotating body 38. These switches 5
1 and 52 are actuated by detecting contact with a detection element 53 such as a protrusion provided on the intermediate rotating body 38, and the yarn feed limit switch 51 rotates the motor 46 in the forward direction by its operation. , and the rewind limit switch 52 causes the motor 46 to rotate in the reverse direction.

The mounting position of the protrusion constituting the above-mentioned detection element 53 can be made variable in order to adjust the operating position of the limit switches 51, 52.

In addition, in the figure, 55 is a thread breakage detection switch, and 56 is a thread breakage detection switch.
57 is a thread remaining amount detection limit switch, 57 is an LED display device that indicates thread breakage and decrease in thread remaining amount, 58
is an infrared light emitting diode that emits a control signal to the outside,
Reference numeral 59 indicates a circuit board provided with an electric circuit for operating each part.

In the electric yarn tension applying device having the above configuration, when a pulling force is applied to the yarn 33 with the motor 46 stopped, the bobbin support member 35 is applied to the intermediate rotating body 38 via the worm wheel 49, the wall 48, and the motor 46. Since the rotation is restrained, the intermediate rotating body 38 is forced to rotate against the force of the return spring 44. This rotation causes the detection element 53 to approach the thread feed limit switch 51, but the detection element 53 cannot operate the thread feed limit switch 51 until a certain amount of rotation is reached. Only the length of yarn that is unwound while the rotating body 38 rotates against the force of the return spring 44 is led out.

When the intermediate rotating body 38 rotates further against the force of the return spring 44 due to further pulling of the thread 33, the detection element 53 on the intermediate rotating body 38 comes into contact with the yarn feed limit switch 51 and actuates it. The yarn feed limit switch 51 is arranged to be actuated by a detection element 53 on the intermediate rotating body 38 when the tension of the yarn 33 reaches a preset value, so that the yarn tension limit switch 51 When the value reaches a certain value, the motor 46 is rotated in the forward direction by the operation of the limit switch 51, and the bobbin 34 is rotated through the worm 48 and the worm wheel 49.

As a result, the thread 33 is drawn out from the bobbin 34, but at the same time as the thread 33 is drawn out, the rotational force applied to the bobbin support member 35 by the thread 33 is reduced, so that the return spring 44 is applied to the intermediate rotating body 38. When the returning tendency is applied by the biasing force and the detecting element 53 returns the yarn feed limit switch 51, the motor 46 stops. However, when the thread 33 is subsequently pulled out, the thread feed limit switch 51 operates again and the motor 46 rotates in the forward direction.

When the drawing of the thread 33 is stopped, even if there is some slack in the thread, the intermediate rotating body 38 is rotated back to some extent by the return spring 44, and the thread is pulled back accordingly, so that the slack in the thread 33 is removed. . When the slack of the yarn 33 cannot be absorbed by the rotation of the intermediate rotary body 38 by the return spring 44, the rotation of the intermediate rotary body 38 by the force of the return spring 44 causes the detection element 53 to operate the rewind limit switch 52, so that the motor 46 is rotated in the reverse direction, and the bobbin 34 is rotated in the reverse direction from the worm 48 via the worm wheel 49. Therefore, the bobbin 34 is rewound until the unwinding limit switch 52 returns and the rotation of the motor 46 stops, whereby all the slack in the thread 33 is rewound. As a result, even when the next thread is drawn out, a substantially constant thread tension is applied from the beginning.

To adjust the tension of the thread 33, the tension of the return spring 44 may be adjusted, or the mounting position of the detection element 53 or the limit switches 51, 52 may be adjusted.

Moreover, the thread 33 unwound from the bobbin 34 is
Since it is guided through the thread breakage detection switch 55, it is activated when a thread breakage occurs, and the LED display device 57 on the guide arm 39 provides a light-emitting display. Therefore, it is clearly recognized in which bobbin among the large number of bobbins 34 the thread breakage has occurred. Further, when the thread breakage detection switch 55 is activated, the infrared light emitting diode 58 on the guide arm 39 emits light, and at the same time the motor 46
An interlock is applied to the The infrared light emitting diode 58 automatically detects its light emission and automatically stops the weaving operation by remote control operation, and the interlock of the motor 46 forces the rotation of the bobbin 34 thereby. It is something that makes you pause.

The remaining yarn amount detection limit switch 56 operates when the amount of yarn in the bobbin 34 approaches the end during weaving, and when it operates, the guide arm 39
The weaving operation is automatically stopped by the light emission display by the upper LED display device 57, the light emission by the infrared light emitting diode 58 on the guide arm 39, and the interlock of the motor 46 is performed.

In addition, in the above embodiment, the fixing member 1,
31 and the intermediate rotary bodies 8, 38, the return spring 1
4 and 44, and the motor 1 is installed between the fixed member 1 or the intermediate rotating body 38 and the bobbin support members 5 and 35.
Worms 18, 4 rotationally driven by 6, 46
8 and worm wheels 19, 49 are provided, and sensors and their detection elements 23, 24, 53, etc. are provided between the fixed members 1, 31 and the intermediate rotating bodies 8, 38, but these are not included in the present invention. The fixed members 1, 31, the intermediate rotating bodies 8, 38, and the bobbin support members 5, 53 can be attached by changing their positions within a range that does not impair the purpose.

[Effects of the Invention] According to the present invention described in detail above, the tension of the thread can be easily stabilized with a simple and compact structure, and a thread tension applying device suitable for being electrically driven is provided. Furthermore, it is possible to obtain an electric yarn tension applying device that can perform sufficient unwinding as needed, and can stably obtain a constant yarn tension.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a first embodiment of an electric yarn tensioning device according to the present invention, FIGS. 2 and 3 are a plan view and a sectional view of essential parts thereof, and FIGS. 4 and 5 are views according to the present invention. FIG. 2 is a side view and a cross-sectional view of a second embodiment of the invention. 1, 31... Fixed member, 3, 33... Thread, 4,
34... Bobbin, 5, 35... Bobbin support member,
8, 38... Intermediate rotating body, 14, 44... Return spring, 16, 46... Motor, 21, 51... Yarn feed limit switch, 22, 52... Rewinding limit switch, 39... Guide arm.

Claims (1)

[Claims] 1. A bobbin support member that supports a bobbin, and a bobbin support member that is rotatably held around the bobbin coaxially with the bobbin support member, and is rotated by the thread pulling force by winding the thread unwound from the bobbin. an intermediate rotating body to which a force is applied; a fixing member that rotatably supports the bobbin support member and the intermediate rotating body; and a return spring that applies a return force to the bobbin support member against the rotational force associated with drawing out the thread. a sensor that operates when a certain amount of rotation is applied to the bobbin support member against the biasing force of the return spring due to thread withdrawal;
An electric yarn tensioning device for a textile machine, comprising: a motor that rotates a bobbin support member in a yarn payout direction by rotating based on the output of the sensor. 2. In the device according to claim 1,
There is a sensor that operates when a certain amount of rotation is applied to the intermediate rotating body to absorb yarn slack due to the biasing force of the return spring, and a sensor that operates when a certain amount of rotation is applied to the intermediate rotating body to absorb the slack in the yarn. What is claimed is: 1. An electric yarn tensioning device for a textile machine, comprising: a motor for rotating in an unwinding direction. 3. A bobbin support member that supports the bobbin, a fixed guide arm that guides the unwound thread from the bobbin, an intermediate rotary body provided coaxially with the bobbin support member, and the bobbin support member and the intermediate rotation body. a fixing member that rotatably supports the bobbin body; a return spring that applies a return force to the bobbin support member against the rotational force that occurs when the thread is pulled out; a sensor that operates when a certain amount of rotation is applied to the support member;
An electric yarn tensioning device for a textile machine, comprising: a motor that rotates a bobbin support member in a yarn payout direction by rotating based on the output of the sensor. 4. In the device according to claim 3,
There is a sensor that operates when a certain amount of rotation is applied to the intermediate rotating body to unwind the slack in the thread due to the biasing force of the return spring, and a sensor that operates when a certain amount of rotation is applied to the intermediate rotating body to unwind the slack in the thread. An electric yarn tensioning device for a textile machine, comprising: a motor for rotating in an unwinding direction.