JP2983121B2 - Anti-slip device for yarn feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn feeder for applying tension to a yarn when the yarn is pulled out from a yarn feeder attached to a creel in the axial direction to prevent the yarn from twisting. It relates to an anti-slip device.

[0002]

2. Description of the Related Art Conventionally, a tension applying device for unwinding a yarn from a yarn feeder attached to a creel is disclosed in
As disclosed in Japanese Unexamined Patent Publication No. 146228, a friction member such as cloth is disposed on both sides of the yarn supplying member, and an operating member for bringing the friction member into contact with a side surface of the yarn supplying member is provided. In some cases, the position is provided movably with respect to the yarn supplying body. And, before unwinding the yarn, manually adjust the position of the operating member so that the friction body contacts a predetermined range on the side surface of the yarn supplying body,
A predetermined tension is applied to the yarn to prevent the yarn from twisting.

[0003]

In the above-mentioned prior art, the diameter of the yarn feeder decreases with the unwinding of the yarn from the yarn feeder. When the contact pressure between the body and the frictional body gradually decreases and the tension applied to the yarn decreases, there is a problem that the yarn is likely to be warped. In addition, if the friction member is set by moving the operating member according to the minimum diameter of the yarn feeder in order to cope with the decrease in the tension of the yarn, when the diameter of the yarn feeder is large, the tension is too large and the yarn may be cut. The problem occurs. Furthermore, even if the optimum tension is obtained at the middle point of the diameter of the yarn supplying body, the yarn may be broken due to a large diameter and a large frictional force at the beginning of unwinding, and the frictional force is small and the tension is small at the end of the unwinding. There was a problem that the yarn unwound after passing was twisted.

The present invention has been made in view of the above-mentioned problems of the prior art, and has a simple configuration, in which the winding diameter of the yarn supplying member changes with respect to the yarn unwound from the yarn supplying member. It is another object of the present invention to provide a yarn feeder anti-blistering device which can reliably prevent the yarn from being twisted by always applying an appropriate tension.

[0005]

SUMMARY OF THE INVENTION The present invention has a yarn feeder on which a yarn is wound, and a mounting member holding the yarn feeder.
A bending member which is located on a side of the yarn supplying member attached to the attachment member and is in contact with the yarn supplying member; and an operating member which brings the friction member into contact with the yarn supplying member. A feeding device provided with a driving device for moving the position of the member, and operating member control means for controlling the driving device to control the position of the operating member so that the friction member comes into contact with the yarn feeder in a predetermined contact state. This is a thread anti-slip device. Further, in the invention, it is preferable that the operating member control means detects a winding amount of the yarn supplying body, and the driving device adjusts the winding amount of the yarn supplying body obtained by the winding amount detecting means. And a drive control device for controlling the position of the operating member.

[0006]

The yarn feeder anti-blistering device of the present invention moves the operating member as the winding amount decreases due to the unwinding of the yarn from the yarn feeder, and the contact of the frictional body with the yarn feeder is controlled by the feeder. In accordance with the change in the winding amount of the thread, the thread is maintained in an appropriate state at all times, and the tension of the released thread is always controlled to an appropriate range necessary for preventing the thread from twisting.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an anti-slip device for a yarn feeder according to the present invention. 1 to 4 show a first embodiment of the present invention. In this embodiment, FIG.
As shown in FIG. 1, a large number of mounting shafts 12 as mounting members are provided on the frame 11 of the creel 10 so as to protrude vertically and horizontally, and the yarn feeders 14 are mounted on the mounting shafts 12, respectively. On both sides of the yarn feeder 14, rod-shaped operating members 16 are protruded in parallel with the mounting shaft 12 at positions not interfering with each yarn feeder 14 in the horizontal direction. The operating member 16 is attached to the mounting shaft 1.
The two left and right holding members 18 and 19 are respectively fixed to a large number of separate holding members 18 and 19. The holding members 18 and 19 are provided separately from the frame 11, and are provided vertically along the plurality of mounting shafts 12. ing. Each holding member 18 is fixed to one horizontal member 20 extending in the horizontal direction.
Are similarly extended in the horizontal direction, and are respectively fixed to the other horizontal members 21 provided in parallel with the horizontal member 20.

The horizontal members 20 and 21 are provided so as to be movable in the horizontal direction, and racks 22 and 23 are fixed to their base ends so as to face each other. Pinion 24 meshed with both 22 and 23
Is provided. The pinion 24 includes a horizontal member 20,
A drive motor 26 for moving the position of the operating member 16 is connected via 21. Therefore, the horizontal members 20, 21
Are provided so as to be movable by equal distances in opposite directions. At the base end of the horizontal member 20, a position detecting device 28 such as a slide resistance is attached. The horizontal members 20, 21 and the holding members 18,
Reference numeral 19 is provided so as to be movable in a direction away from the frame 11 when the yarn supplying body 14 is replaced or the like.

As shown in FIG. 2, on both sides of the yarn feeder 14, friction members 3 made of cloth, resin film, rubber sheet or the like are provided.
0 is provided. The friction bodies 30 are vertically arranged along the plurality of yarn supply bodies 14 arranged in the vertical direction, and the upper ends thereof are fixed to the uppermost operation members 16 and are provided inside the respective operation members 16 below. Each of the friction members 30 has a weight 32 attached to the lower end thereof.

The yarn feeder anti-slip device of this embodiment includes:
As shown in FIG. 3, the winding amount detecting means 60 which is an operating member control means for controlling the position of the operating member 16 and the drive control device 4
0 is provided. The winding amount detecting means 60 includes a winding amount sensor 61 attached above the yarn supplying body 14 for detecting a distance to the surface of the yarn supplying body 14 and a distance L from the winding amount sensor 61 to the mounting shaft 12 in advance. A setting device 62 for inputting and setting is provided. In addition, the drive control device 40 includes:
A setter 43 for setting a predetermined coefficient K for correcting the amount of covering caused by a decrease in the winding amount of the yarn supplying body 14 and a calculator 44 for multiplying this coefficient by an output from the winding amount detecting means 60 are provided. ing. Further, the drive control device 40 has a storage unit 45 for storing the winding amount of the yarn supplying body 14 and the position of the operating member 16 at the start of the operation of the drive control device 40 as initial values. An inverter 46 for inverting the output and a drive amplifier 47 are provided. And
The memory 45 and the inverter 46 are provided with a manual switch Rb.
And an automatic switch Ra
Are connected to a control signal line input to the drive amplifier 47. The control signal of the drive control device 40 is input to the drive motor 26 via a drive amplifier 47 and an automatic switch Ra. The drive motor 26 is manually operated to drive the drive
Is set in the initial position, and a manual switch S is also connected in parallel. Then, the drive control device 40
The drive motor 26 and the position detection device 28 form a negative feedback system.

Next, the operation of the yarn feeder anti-slip device of this embodiment will be described below. First, the bobbin 14a of the yarn supplying body 14 is inserted into each mounting shaft 12 of the creel 10.
Then, as shown in FIG. 4, the winding thickness t is detected for the yarn supplying body 14 below the location where the winding amount sensor 61 is provided, which is a predetermined measurement location. Here, since the yarn supplied from the creel 10 is unwound almost in the same manner, it is sufficient to detect the winding amount for one yarn supplying body 14 and the winding thickness t.
Includes the thickness of the bobbin 14a. And, even if the yarn feeder 14 has the same winding thickness t, the outer diameter of the yarn feeder 14 greatly varies depending on the thickness of the bobbin 14a as shown by the two-dot chain line in FIG. Such control is required. Here, the initial value of the outer diameter of the yarn supplying body is D ₀ , the outer diameter at the time of unwinding is D, the inner diameter of the bobbin 14 a is d ₀ , the distance from the winding amount sensor 61 to the surface of the yarn supplying body X is X, The distance between the pair of operating members 16 on both sides of the yarn supplying body 14 is Y, and the distance from the winding amount sensor 61 to the mounting shaft 12 is L.

Since the distance L is a fixed value, the winding thickness t is inputted in advance by the setting device 62, the distance X to the yarn supplying body 14 is detected by the winding amount sensor 61, and L-X = t is set. Desired. Further, the predetermined coefficient K multiplied by the winding thickness t by the arithmetic unit 44 is set to correct the covering amount of the friction body 30 due to the change in the winding amount of the yarn supplying body 14, and K
Is a value around 1. Then, at the matching point a of the drive control device 40, the value obtained by multiplying the winding thickness t by K by the calculator 44 and the position Y / 2 of the operating member 16 from the operating center axis obtained from the position detecting device 28 are obtained. Obtain the difference (Y / 2-Kt). Here, before performing the control of the operating member 16, first, the initial interval of the interval Y between the pair of operating members 16 is set to Y _0, and the initial winding thickness of the yarn supplying body 14 is set to t _{0 in} the memory 45. _{As 0} , the initial value (Y ₀ / 2−Kt ₀ ) is stored. This storage operation is performed by turning on the manual switch S, operating the drive motor 26, and causing the friction members 30 to move the yarn feeder 1 by the respective operating members 16.
The drive motor 26 is stopped at a position where an appropriate amount of contact can be obtained on both sides of the surface of the surface 4, and at this time, the switch Rb is also turned on and the value of (Y ₀ / 2−Kt ₀ ) is stored in the storage device 45. It is.

Thereafter, the manual switches S and Rb are turned off, and the automatic switch Ra is turned on. Then, the initial value (Y ₀ / 2−Kt ₀ ) stored in the storage device 45 is inverted at the sign via the inverter 46 and output to the combining point b.
The difference between the output value (Y / 2−Kt) at the matching point a of the output from the arithmetic unit 44 and the output from the position detection device 28 is obtained. This difference is obtained by multiplying the amount of yarn reduction (t ₀ -t) by the coefficient K, K (t ₀ -t), and the movement amount of the operating member 16 (Y ₀ / 2−
Y / 2), and immediately after the manual switches S and Rb are turned off and the automatic switch Ra is turned on, the output value (Y / 2−Kt) is equal to the initial value (Y / 2−Kt). Y
₀ / 2−Kt ₀ ), and the input value of the drive amplifier 47 is 0
It is. Thereafter, when the yarn is unwound from the yarn supplying body 14 and the initial winding thickness t ₀ decreases to become the winding thickness t, the yarn supplying body 1 at that time is reduced.
K (t ₀ ) which is a value corresponding to the amount of decrease (t ₀ −t) of the yarn No. 4
−t) and the movement amount of the operating member 16 (Y ₀ / 2−Y / 2)
The value is input to the drive amplifier 47, the drive motor 26 is operated, the position of the operating member 16 is narrowed, and the position is fed back as an output of the position detecting device 28, The drive motor 26 is controlled so that is set to 0. Here, the movement of the operating member 16 is K
Is 1, the actuating members are moved toward the yarn feeder 14 by an amount equal to the reduced thickness of the yarn of the yarn feeder 14, and the friction body 30 is always in contact with the yarn feeder 14 at the initially set covering position. Is controlled. When K is larger than 1, the operating member 16 moves K times more than the reduced thickness of the yarn of the yarn supplying body 14, and the interval between the operating members 16 is narrowed more quickly. Further, when K is smaller than 1, the moving amount of the operating member 16 is smaller than the decreasing amount of the yarn supplying body 14. Therefore, K may be set appropriately according to the situation.

According to the yarn feeder anti-blistering device of this embodiment, the interval between the actuating members 16 is reduced according to the predetermined coefficient K for correcting the covering amount as the yarn of the yarn feeder 14 decreases. Appropriate tension is always applied to the yarn to be unwound and unwound to prevent the yarn from twisting.

Next, a description will be given of a second embodiment of a yarn feeder anti-slip device according to the present invention with reference to FIGS. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The yarn feeder anti-slip device of this embodiment uses the drive control device 50 shown in FIG. 5 and controls the contact angle θ of the friction body 30 with the yarn feeder 14 to be constant. The drive control device 50 includes a bobbin 1
Setter 51 inputs to set the inner diameter d ₀ of 4a, and the setter 52 for inputting set the contact angle θ is provided for yarn supplier 14 of the friction member 30, the inner diameter d ₀ and the contact angle θ is calculator 53 has been input. As shown in FIG. 6, the calculator 53 calculates and outputs a covering amount W of the friction body 30 with respect to the yarn supplying body 14.

Here, the calculation of W is given by W = OC-OE = D / 2. {1-COS (θ / 2)} (1) from FIG. Here, θ is the setting device 52
And the outer diameter D of the yarn supplying body 14
Since D = d ₀ + 2t, W = (d ₀ + 2t) / 2 · {1-COS (θ / 2)} = {d ₀ +2 (L−X)} / 2 · {1-COS ( θ / 2)} (2).

The drive control device 50 includes the yarn feeder 14.
A setting device 54 is provided for setting and inputting the initial outer diameter D ₀ . The initial radius D of the yarn suppliers 14 _0/2
At the matching point c between the position data Y / 2 and the position data Y / 2 of the operating member 16 obtained by the position detector 28 (D ₀ / 2−Y /
2) and the output W of the arithmetic unit 53 at the matching point a is
The signal is input to the drive amplifier 47. That is, the operating member 16 is controlled so that D ₀ / 2−Y / 2, which is the amount of movement of the operating member 16, is equal to the above-mentioned covering amount W. The covering amount W is set to a constant contact angle θ.

According to this embodiment, the contact angle of the friction body 30 is constantly controlled to be constant, and the tension of the yarn unwound from the yarn supplying body 14 can be controlled within a more appropriate range. .

As another embodiment of the yarn-supplying-body anti-skid device of the present invention, the frictional body 30 with respect to the yarn-supplying body 14 is set by using the contact angle θ set by the setting unit 52 in the second embodiment as a parameter. May be controlled to be constant. That is, from FIG. 6, the contact length AB of the frictional body 30 is: AB = D / 2 · θ = (d ₀ + 2t) θ / 2 = {d ₀ +2 (L−X)} θ / 2 (3) By making the contact length AB constant, calculating θ from the equation (3) using the distance data X from the winding amount sensor 61, and inputting this to the calculator 53, the control for making the contact length constant can be performed. It is possible.

The distance Y between the actuating members 16 is expressed as follows: Y = D−2W (4), using the above-mentioned covering amount W, so that W is substituted into equation (4) from equation (1). Y = D−2 [D / 2 · {1-COS (θ / 2)}] = {d ₀ +2 (L−X)} · {COS (θ / 2)} (5) Therefore, in the case of controlling by setting and inputting θ, the position Y of the operating member is determined by the set and input θ according to Expression (5).
May be calculated to control the operating member. Further, when the position of the operating member is known on the driving device side, for example, when a pulse motor or the like is used as the driving motor, the number of driving pulses and the position of the operating member 16 have a predetermined relationship. Instead, the position of the operating member 16 can be controlled by a predetermined program. These controls can be easily performed by a microcomputer.

Further, the position of the operating member may be controlled as long as the tension of the unwound yarn can be controlled within a certain range, in addition to the above-described embodiment. Control may be performed, and the control method may be appropriately selected. In addition, the winding amount detection, other than the winding amount sensor, detection of the winding diameter of the yarn feeder, the number of balloons per unit time of the yarn to be unwound, the unwinding time, the weight of the yarn feeder, or It is also possible depending on the position of the weight attached to the friction body, and the winding amount detecting means may be one that calculates using these variables.

[0022]

According to the anti-skid device of the present invention, the actuating member for bringing the friction member into contact with the yarn feeder is controlled so that the tension within the appropriate range for the yarn unwound from the yarn feeder is controlled. Since it is provided, it is possible to reliably eliminate the occurrence of yarn breakage and twisting of the yarn unwound from the yarn supplying body.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an anti-slip device for a yarn feeder according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an attached state of a friction body of the yarn feeder anti-slip device of the first embodiment.

FIG. 3 is a block diagram of a drive control device of the yarn feeder anti-tiling device of the first embodiment.

FIG. 4 is a front view showing an attached state of a frictional body of the yarn feeder anti-slip device of the first embodiment.

FIG. 5 is a block diagram of a drive control device of a yarn feeder anti-blistering device according to a second embodiment of the present invention.

FIG. 6 is a front view showing a mounted state of a frictional body of the yarn feeder anti-bill device of the second embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 12 mounting shaft 14 yarn feeder 16 operating member 26 drive motor 28 position detecting device 30 frictional member 40, 50 drive control device 60 winding amount detecting means 61 winding amount sensor

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D02H 13/22-13/24 B65H 59/06 D02H 1/00

Claims (2)

(57) [Claims] 1. A yarn feeder on which a yarn is wound, and an attachment member holding the yarn supply member, wherein the yarn supply member is located on a side of the yarn supply member attached to the holding member. A driving device for moving the position of the operating member, and a driving device for moving the position of the operating member, wherein the driving device is provided with a bendable frictional body that comes into contact and an operating member that brings the frictional body into contact with the yarn feeding body. Operating member control means for controlling a position of the operating member so as to control the apparatus so that the friction member comes into contact with the yarn supplying member in a predetermined contact state. . 2. The operating member control means includes: a winding amount detecting means for detecting a winding amount of the yarn supplying body; and the driving device in accordance with the winding amount of the yarn supplying body obtained by the winding amount detecting means. The anti-slip device for a yarn feeder according to claim 1, further comprising a drive control device for controlling a position of the operating member.