JP2009208889A - Yarn brekage detection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yarn breakage detection device offering high detection reliability. <P>SOLUTION: The yarn breakage detection device includes: a fixedly installed support member 1; an arm member 4 with its one end attached to the support member 1 in a vertically pivotable manner, which pivots as it is lifted upward by a tensile force of a yarn 3 passing through a guide member 2 disposed at the other end; a beam irradiation means 5 to irradiate, with a beam, a position to which the arm member 4 pivots down as the yarn 3 passing through the guide member 2 breaks or comes slack; and a detection means 6 for detecting that an optical path of the beam is shut off by the arm member 4. When the arm member 4 pivots down due to the breakage or slack in the yarn 3, the arm member 4 shuts off the optical path of the beam, and the detection means 6 detects that the optical path of the beam has been shut off, thereby capable of detecting the occurrence of the breakage or slack in the yarn 3 in a noncontacting manner. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a yarn breakage detection device that detects cutting or loosening of a yarn supplied to a twisting machine or the like.

  When twisting a yarn with a twisting machine, the yarn (or raw yarn) is sent from a creel stand, which is a tension adjusting device, to a twisting machine, and a plurality of yarns are twisted together and twisted on a bobbin attached to a spindle. It is designed to be wrapped around. A series of processes for supplying and twisting the yarn to the twisting machine in this way is automatically performed by the machine. However, due to some trouble, the supplied yarn is cut or wound around the bobbin. When the yarn is cut or the yarn is loosened due to the removal of the raw cheese from the creel stand, the cutting or loosening of the yarn is detected by visual observation by the operator. When the thread is cut or loosened by the operator's monitoring, the twisting machine is stopped and restored.

  However, since operators usually monitor multiple twisting machines in a large area, it is often the case that the discovery of thread cutting or loosening is delayed, and the stoppage of the twisting machine is delayed, so that the thread is turned into the twisting machine. It could cause the machine to break down and cause a large number of twisted yarn defects. Moreover, since it is indispensable to monitor the worker, it was impossible to carry out unattended operation such as at night.

In view of this, there has been proposed a yarn breakage detection device that can automatically detect yarn breakage (see Patent Document 1). In this device, one end of a detection body connected to an energizing wire is rotatably supported, a thread is passed through the other end of the detection body, and the detection body is lifted by tension of the thread. And when the detection body falls due to the thread being cut, the detection body is in contact with the electrode, and a closed circuit is formed between the conductive wire and the electrode through the detection body, The occurrence of thread breakage is detected.
No. 6-30774

  In the case of Patent Document 1, yarn breakage can be automatically detected without monitoring by an operator, but detection is performed based on the presence or absence of electrical contact between the detector and the electrode. If the body or electrode is contaminated or rusted, and the conductivity becomes poor, the sensing body may not operate normally even if it touches the electrode. there were.

  The present invention has been made in view of the above points, and an object thereof is to provide a yarn breakage detection device with high detection reliability.

  The yarn breakage detecting device according to the present invention includes a support member 1 that is installed and fixed, and a tension of a yarn 3 that is attached to the support member 1 so as to be pivotable in the vertical direction and that passes through a guide member 2 provided at the other end. An arm member 4 that is lifted and rotated upward, a beam irradiating means 5 that irradiates the beam to a position where the arm member 4 rotates and drops due to the cutting or loosening of the thread 3 passed through the guide member 2, And a detecting means 6 for detecting that the optical path L is blocked by the arm member 4.

  According to the present invention, when the arm member 4 is rotated and dropped due to the thread 3 being cut or loosened, the beam optical path L is blocked by the arm member 4, and the beam optical path L is blocked. By detecting with the detection means 6, it is possible to detect the breakage or looseness of the yarn 3 in a non-contact manner, and it is possible to detect with high reliability without being affected by dirt. It can be done.

  Further, the present invention is characterized in that, in addition to the above-described components, the arm member 4 that falls is in contact with the stopper 7 to regulate the dropping position of the arm member 4.

  According to the present invention, the position at which the arm member 4 is rotated and dropped by the thread 3 being cut or loosened is positioned by the stopper 7, and the arm member 4 reliably blocks the optical path L of the beam. Can be performed.

  Further, the present invention is characterized in that, in addition to the above-described components, an alarm device 8 is provided that issues an alarm when the detecting means 6 detects that the optical path L of the beam is blocked. .

  According to the present invention, it is possible to automatically notify the occurrence of the cutting or loosening of the yarn 3.

  According to the present invention, the fact that the arm member 4 has been rotated and dropped due to the thread 3 being cut or loosened can be detected by blocking the optical path L of the beam by the arm member 4, 3 can be detected in a non-contact manner, and can be detected with high reliability without being affected by dirt or the like.

  Hereinafter, the best mode for carrying out the present invention will be described.

  FIG. 1 shows an example of an embodiment of the present invention, and a threader A including a support member 1, an arm member 4, and a stopper 7 is used. The support member 1 is formed by standing a support piece 16 on a fixed piece 15. The support member 1 is attached to an arbitrary base surface of a yarn supplying device such as a twisting machine by fixing the fixing piece 15 with a bolt and nut.

  The arm member 4 is attached to the upper end portion of the support piece 16 of the support member 1 so as to be rotatable in the vertical direction. A connecting portion 17 is provided at one end of the arm member 4, and the connecting portion 17 is rotatably connected to the support piece 16 by a shaft 14 formed of a bolt and nut or the like, so that the arm member 4 can be moved with a light force. It is designed to be turned up and down. A guide member 2 is attached to the other end of the arm member 4. The guide member 2 is formed in a ring shape twisted in an “α” shape.

  A stopper 7 is attached to the support piece 16 of the support member 1 at a position below the arm member 4. The stopper 7 is formed by bending a fixed piece 18 and a locking piece 19 at the tip into an L shape, and is attached by fixing the base of the fixed piece 18 to the support piece 16. The locking piece 19 of the stopper 7 is disposed so as to be positioned on the trajectory plane on which the arm member 4 rotates, and when the arm member 4 rotates downward, the arm member 4 as shown in FIG. The lower edge is brought into contact with the upper edge of the locking piece 19 to be locked.

  As the beam irradiating means 5, for example, a photoelectric switch including a light emitting element 21 and a light receiving element 22 that receives a beam emitted from the light emitting element 21 can be used. The light emitting element 21 and the light receiving element 22 of the beam irradiating means 5 are respectively disposed on both sides of the threader A, and the optical path L of the beam irradiated from the light emitting element 21 and incident on the light receiving element 22 is determined. As shown in FIG. 1, the positions of the light emitting element 21 and the light receiving element 22 are set so as to pass through the position of the arm member 4 in a state of being locked to the locking piece 19 of the stopper 7. As shown in FIG. 1, the light receiving element 22 forming the beam irradiation means 5 is electrically connected with a detection means 6 formed with a CPU, a memory and the like. Further, an alarm device 8 whose operation is controlled by the detection means 6 is connected to the detection means 6.

  The yarn 3 supplied to the twisting machine is sent to the twisting machine after passing through the guide member 2 provided on the arm member 4 of the above threading device A. The yarn 3 is tensioned by a creel stand or the like. In the hung state, it is passed through the guide member 2 and sent to the twisting machine.

  When tension is applied to the thread 3 passed through the guide member 2 as described above, the guide member 2 is pulled up by the tension of the thread 3 as shown in FIG. 4 is rotated and lifted upward. When the arm member 4 is thus rotated upward, the optical path L of the beam emitted from the light emitting element 21 passes below the arm member 4 and enters the light receiving element 22.

  Here, if the yarn 3 is cut or loosened due to some trouble, the tension of the yarn 3 does not act on the guide member 2, and there is no force to rotate the arm member 4 upward. Then, the arm member 4 rotates downward under its own weight, and the arm member 4 falls to a position where it is locked to the locking piece 19 of the stopper 7. When the arm member 4 is pivoted downward and dropped in this manner, the optical path L of the beam emitted from the light emitting element 21 passes through this position. Therefore, the optical path L of the beam is blocked by the arm member 4 and the beam Is not received by the light receiving element 22. The light receiving element 22 outputs a light receiving signal of the beam to the detecting means 6, but when the beam is not received, the light receiving signal is not input to the detecting means 6, so that the light path L of the beam is cut off. Can be detected.

  In this way, by detecting that the optical path L of the beam is blocked by the arm member 4 by the detecting means 6, it is possible to detect that the thread 3 has been cut or loosened. A detection signal is output to the alarm device 8, and the alarm device 8 can be operated to inform the operator of the yarn cutting or loosening. Accordingly, the yarn feeder can be immediately stopped to restore the supply of the yarn without overlooking that the yarn 3 has been cut or loosened. Further, when detecting that the optical path L of the beam is interrupted by the detecting means 6, in addition to operating the alarm device 8 in this way, the detecting means 6 automatically turns off the twisting machine. The operation may be controlled. If the twisting machine is automatically stopped in this way, it is possible to carry out unattended operation such as at night.

  As described above, the cutting and loosening of the yarn 3 is detected by blocking the optical path L of the beam by the arm member 4 that rotates and drops when the cutting or loosening of the yarn 3 occurs. Since it can be performed by a non-contact optical method, even if dirt or the like adheres to the arm member 4, it has an influence on the blocking of the optical path L of the beam. There is no such thing as giving. Therefore, as in the conventional example in which detection is performed by using electrical contact, the detection of cutting or loosening of the yarn 3 can be performed without the problem that the reliability of detection decreases due to the decrease in the conductivity due to adhesion of dirt or the like. Can be performed with high reliability. Further, the material of the arm member 4 is not limited to a material having good electrical conductivity, and there is a problem in electrical conductivity like aluminum, but a lightweight material can be used. Even if the weight of the arm member 4 acts on the thread 3 passed through the guide member 2, it is possible to make it difficult to affect the tension of the thread 3.

  Further, when the arm member 4 is rotated and dropped due to the cutting or loosening of the yarn 3, the arm member 4 is dropped to a certain position where it comes into contact with the stopper 7 and stopped. Therefore, by arranging the optical path L of the beam at this position, the beam optical path L can be reliably interrupted by the dropped arm member 4, and the reliability of detecting the cutting or loosening of the yarn 3 is ensured. Can be increased.

  In the embodiment of FIG. 1, the mode for one yarn 3 is shown. However, a plurality of yarns are simultaneously supplied to the twisting machine, and in an actual twisting machine, The plurality of threading tools A are arranged in a line, and the light emitting element 21 and the light receiving element 22 constituting the beam irradiating means 5 are arranged outside the threading tools A located at both ends, respectively. In A, the yarn 3 is cut and loosened at the same time. When the arm member 4 falls when the thread 1 is cut or loosened in any of the threading tools A among the plurality of threading tools A, the beam optical path L is blocked by the arm member 4. It is possible to detect the cutting and loosening of the thread 1 in all the threading tools A.

  In the above embodiment, the twisting machine has been described. However, the yarn breaking device of the present invention is not only applied to such a twisting machine but also applied to all devices that supply the yarn 3 while applying tension. Is. Furthermore, in the present invention, the yarn 3 includes not only a yarn used in a twisting machine but also a wire material such as a string.

An example of an embodiment of the invention is shown, and (a) and (b) are perspective views, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Support member 2 Guide member 3 Yarn 4 Arm member 5 Beam irradiation means 6 Detection means 7 Stopper 8 Alarm

Claims (3)

  A support member to be installed and fixed; an arm member having one end pivotably attached to the support member and pivoted upward by the tension of a thread passed through a guide member provided at the other end; and the guide member A beam irradiating means for irradiating the beam to a position where the arm member is rotated and dropped by cutting or loosening of the thread passed through, and a detecting means for detecting that the optical path of the beam is blocked by the arm member. A yarn breakage detecting device characterized by comprising:   The yarn breakage detecting device according to claim 1, further comprising a stopper that abuts the falling arm member and regulates the dropping position of the arm member.   The yarn breakage detecting device according to claim 1 or 2, further comprising an alarm device that issues an alarm when the detecting means detects that the optical path of the beam is interrupted.

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