JPH09279426A - End breakage sensor for spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate position adjusting operation when the fixing position of a sensor is adjusted corresponding to the change in a ring diameter to be mounted on a ring rail. SOLUTION: This end breakage sensor 3 equipped with a supporting part 5 and detecting heads 6 which are integrally formed at both ends of the supporting part 5 and projected so as to be extended slantwise based on the longer direction of the supporting part. The detecting heads 6 are obtained by making permanents magnets 7, magnetic yokes 8, pickup coils 9 and core materials 10 into units by molding a resin. The magnetic yokes 8 are extended in parallel with the detecting heads 6. The supporting part 5 is provided with two insertion holes 5a, into which screws are inserted, as long holes extending in the longer direction of the supporting part 5. The supporting part 5 is formed so as to adjust its fixation position by relative movement along the longer direction of a ring rail. Spring type connectors 11a to 11c are laid at the central part of a fixing face 5b of the supporting part 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn breakage sensor for a spinning machine such as a ring spinning machine and a ring twisting machine, and more particularly, a yarn breaker for a spinning machine that detects the presence or absence of a yarn by utilizing an electromagnetic induction effect of traveling of a traveler. It relates to a sensor.

[0002]

2. Description of the Related Art As a thread breakage sensor of this type, Japanese Patent Laid-Open No. 6-
In 228833 publication, as shown in FIG. 11, a traveler clearer 52 fixed on a ring rail 51 is used as a magnetic core (magnetic yoke), and a pickup coil 53 is wound around a blade 52a of the traveler clearer 52. A break sensor 54 has been proposed. The fixed position of the traveler clearer 52 is accurately adjusted so that the distance between the edge (cutting edge) of the blade 52a and the rotation locus of the traveler 56 traveling on the ring 55 becomes a predetermined value. The size of the traveler 56 may be changed depending on the thickness of the spun yarn, and the traveler clearer 52 may be changed as the size of the traveler 56 is changed.
The fixed position of is adjusted. A long hole 52b extending the thread break sensor 54 in a direction orthogonal to the longitudinal direction of the ring rail 51.
The distance from the center of the ring 55 to the tip of the blade 52a, which is the tip of the magnetic yoke, is changed by moving it along the direction. Therefore, with this thread break sensor 54,
It is not necessary to secure a new space for attaching the thread break sensor 54, and the air gap of the magnetic circuit is automatically adjusted to an appropriate state by adjusting the clearance of the traveler clearer 52.

Further, Japanese Patent Laid-Open No. 5-77166 discloses that
As shown in FIG. 12, a sensor 59 is disclosed which is fixed to the rear end of the ring rail 51 via a bracket 57 and a screw 58. The bracket 57 has an elongated hole 56 extending in a direction orthogonal to the longitudinal direction of the ring rail 51.
a is formed.

[0004]

By the way, although the traveler clearer is normally equipped in a ring spinning machine for producing cotton yarn having a relatively large amount of scattered fibers, it is not usually equipped in a ring spinning machine for spinning, for example. . Therefore, it is not necessary to adopt the traveler clearer type thread breakage sensor 54 in the ring spinning machine which is not equipped with the traveler clearer. In this case, it is conceivable to equip the ring spinning machine for wool spinning with a traveler clearer type thread breakage sensor 54 for the purpose of detecting thread breakage. However, since the ring for wool spinning has a unique shape in which the mounting area is remarkably widened, there is currently no space for mounting the traveler clearer between the rings.

At the spinning factory, when the spinning conditions are changed,
In some cases, the same ring rail may be used to replace the ring with a different diameter. At this time, to ensure the sensitivity of the sensor and to prevent the sensor and the traveler from interfering with each other,
It is necessary to adjust the distance between the tip of the sensor and the ring to an appropriate distance.

The sensitivity of the magnetic sensor deteriorates as the distance between the tip surface of the magnetic yoke and the ring 55 increases (sensitivity is inversely proportional to the cube of the distance (air gap) between the ring 55 and the tip surface of the magnetic yoke). . Further, when the distance between the center of the tip surface and the ring 55 is the same, the sensitivity of the sensor becomes better as the tip surface of the magnetic yoke is closer to a state orthogonal to a straight line extending radially from the center of the ring 55.

In the sensor 59 disclosed in Japanese Unexamined Patent Publication No. 5-77166, by moving the sensor 59 along the long hole 57a in the direction orthogonal to the longitudinal direction of the ring rail 51, the tip end surface of the magnetic yoke is ringed. The mounting position can be changed in a state of being substantially orthogonal to a straight line extending radially from the center of 55. If you change the ring diameter due to changes in spinning conditions, the diameter does not change significantly,
It is about ± 2 mm with respect to the standard ring diameter.
When the ring diameter of 38 mm is the standard, the range to be changed is 36 mm or 40 mm. Therefore, the required movement distance of the sensor is 1mm and 36mm with respect to the reference ring.
Replacement of a ring with a diameter of 40 mm and a ring with a diameter of 40 mm results in 2 mm. Since the sensitivity of the sensor is inversely proportional to the cube of the air gap as described above, it is necessary to adjust the moving distance as accurately as possible when adjusting the position.

When the required movement amount of the sensor is small, even a small error causes a large proportion of the error. For example, if the required amount of movement is 1 mm, a difference of 0.1 mm results in an error of 10%. In the conventional yarn breakage sensor, since the detection head and the circuit for processing the signal are connected via the lead wire, there is a problem that the number of wiring man-hours becomes large and the cotton wool easily accumulates. If the sensor is installed on the front side of the ring rail, the adjustment work will be easier, but the dust collecting device on the lead wire will move along the spinning machine base and use the airflow to clean it. There is a problem that the opportunity to be taken into the spun yarn by the air flow due to the traveling cleaner) increases.

The present invention has been made in view of the above problems, and a first object of the present invention is to provide a thread breakage sensor for detecting the presence or absence of thread breakage for each spindle, which is mounted on a ring rail. An object of the present invention is to provide a yarn breakage sensor for a spinning machine, which can easily perform position adjustment work when the position of the sensor is adjusted in response to a change in diameter or a traveler having a different size.

In addition to the first object, a second object is to provide a detection head and its output signal without providing a lead wire having a sufficient length for position adjustment at least on the thread break sensor side. Another object of the present invention is to provide a yarn breakage sensor for a spinning machine, which can be electrically connected to a circuit for processing yarn.

[0011]

In order to achieve the first object, the invention according to claim 1 is an electromagnetic induction in which a traveler made of a magnetic material that rotates on a ring made of a magnetic material crosses a magnetic circuit. In a yarn breakage sensor for a spinning machine that detects the presence or absence of a yarn by utilizing the action, a tip portion of a magnetic yoke extends in a radial direction of the ring at a support portion provided with a detection head unitizing a magnetizing means, a pickup coil and the like. It is formed so that it can be mounted on the ring rail so as to be movable in a state of being orthogonal or substantially orthogonal to a straight line.

According to a second aspect of the present invention, the supporting portion is formed so as to be capable of adjusting a fixed position by linearly moving relative to the ring rail, and the magnetic yoke is oblique to the straight line. It is provided so as to extend.

According to a third aspect of the present invention, in the second aspect of the present invention, the support portion is attached to a mounting portion made of a magnetic material and integrally extending upward on the rear side of the ring rail. The fixed position is adjustable along the.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the fixed portion is formed so that the fixed position can be adjusted by moving relative to the ring rail in an arc shape, and the detection is performed. The head is provided so that the tip end surface of the magnetic yoke extends in a direction orthogonal to the mounting surface of the support portion.

According to a fifth aspect of the invention, in the invention according to any one of the first to third aspects, a plurality of the detection heads are provided at the same pitch as the spindle pitch.

According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, a support portion is provided between the attachment portion of the ring rail and the attachment surface of the support portion. A spring-type connector is provided for electrically connecting the detection head to a circuit on the side of the mounting portion when is fixed to the mounting portion.

In the invention described in claims 1 to 6, the yarn breakage sensor is mounted on the ring rail such that the tip surface of the magnetic yoke is at a predetermined distance from the ring. The magnetic yoke is magnetized by the magnetizing means, and a part of the ring flange serving as the travel path of the traveler becomes a part of the magnetic circuit formed by the magnetic flux passing through the magnetic yoke. As the traveler moves over the ring flange and traverses the magnetic circuit, the magnetic flux in the magnetic circuit changes. The change in magnetic flux induces a voltage in the pickup coil in proportion to the number of turns of the coil. A pulse voltage synchronized with the rotation of the traveler is generated at both ends of the pickup coil, and the presence or absence of yarn breakage is detected based on the voltage at both ends of the pickup coil.

When changing the ring to a different diameter or changing the size of the traveler, the thread breakage sensor should be installed at a position where the sensitivity does not interfere with the ring and the traveler and the sensitivity of the sensor is almost the same as before the change. Be changed. When the mounting position of the yarn breakage sensor is changed, the support portion provided with the detection head is moved and predetermined so that the tip end surface of the magnetic yoke moves in a state of being orthogonal or substantially orthogonal to the straight line extending in the radial direction of the ring. Fixed in position. The amount of movement of the support portion becomes larger than the amount of change in the distance between the tip surface of the magnetic yoke and the ring, and even if there is a slight error in the amount of movement of the support portion, the effect on sensitivity is reduced. Therefore, the position adjustment work becomes easy.

According to the second aspect of the invention, the support portion is linearly moved relative to the ring rail during position adjustment. In the invention according to claim 3, the support portion is fixed to a mounting portion integrally extending upward on the rear side of the ring rail, and along the longitudinal direction of the ring rail on the mounting portion corresponding to the change of the ring or the like. It is moved and the position is adjusted.

According to the fourth aspect of the invention, the support portion is moved in an arc shape relative to the ring rail during position adjustment. In the invention according to claim 5, since the plurality of detection heads are provided at the same pitch as the spindle pitch, the position adjustment of the plurality of weights is completed at the same time by the position adjustment of one support portion, and the detection heads are attached to the support portions. Compared with a sensor provided with only one, the labor of adjustment work and installation work is greatly reduced.

According to the sixth aspect of the invention, when the support portion is fixed to the mounting portion of the ring rail, the detection head is electrically connected to the ring rail side circuit via the spring type connector. Therefore, unlike the conventional sensor, a lead wire provided with a margin of length for allowing the sensor to move when adjusting its fixed position is not necessary, and the mounting work becomes easier.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS. The ring rail 1 is formed by pressing a steel plate as a magnetic material, as shown in FIG.
As shown in, the cross section is formed into a crank shape. Ring rail 1 has a certain interval (spindle pitch)
A hole 1a is formed in the hole 1a, and the ring 2 is detachably attached to the hole 1a. The thread breakage sensor 3 is provided on the rear side of the ring rail 1 (on the right side of FIG. 2) at a predetermined interval (in this embodiment, twice the spindle pitch in the mounting portion 1b extending upward from the mounting surface of the ring 2). ) Is installed for each. The thread breakage sensor 3 is fixed to the ring rail 1 via two screws 4 as fasteners which are screwed into screw holes 1c formed in the mounting portion 1b. As shown in FIG. 4, a square communication hole 1d is formed in the center of both screw holes 1c in the mounting portion 1b.

As shown in FIGS. 1 and 3 (a) and 3 (b), the thread breakage sensor 3 is formed integrally with the support portion 5 and the support portion 5 formed so as to be attachable on the attachment portion 1b. The two detection heads 6 are provided. The detection head 6 has a permanent magnet 7 as a magnetizing means, a magnetic yoke 8 made of a magnetic material, a pickup coil 9, and a core body 10 made of a magnetic material, which are molded with resin to form a unit. 5 are arranged at both ends. Two insertion holes 5 a, through which the screws 4 are inserted, are formed in the support portion 5 as elongated holes extending along the longitudinal direction of the support portion 5. That is, the support portion 5 is formed so that the position of the fixed position can be adjusted by linearly moving relatively along the longitudinal direction of the ring rail 1. Further, spring-type connectors 11a, 11b, 11 are provided at the center of the mounting surface (back surface) 5b of the support portion 5.
c is provided.

As shown in FIGS. 1 and 3A, the detection head 6 is provided so as to extend obliquely with respect to the longitudinal direction of the support portion 5, and the magnetic yoke 8 also extends in parallel with the detection head 6. Has been formed. The angle formed by the extending direction of the detection head 6 and the longitudinal direction of the support portion 5 is appropriately set depending on the diameter of the ring 2 used and the range of change thereof. The magnetic yoke 8 is made of a magnetic material such as iron, carbon steel or silicon steel. The magnetic yoke 8 is composed of a disk-shaped pedestal portion 8a and a cylindrical coil winding portion 8b having a diameter smaller than that of the pedestal portion 8a protruding from the pedestal portion 8a. It is arranged so as to extend obliquely with respect to the moving direction during adjustment. Further, in this embodiment, when the thread breakage sensor 3 is fixed at a predetermined position corresponding to the use of the small diameter ring 2, the magnetic yoke 8 is formed so as to extend substantially in line with the straight line extending in the radial direction of the ring 2. Has been done. Further, the magnetic yoke 8 is formed so that its tip surface 8c is orthogonal to the longitudinal direction of the magnetic yoke 8.

The permanent magnet 7 is arranged so as to be attracted to the bottom surface of the pedestal portion 8a on the side opposite to the coil winding portion 8b. The core body 10 is formed in a shape in which one end side of a cylinder is obliquely cut, and the first end surface is attracted to the permanent magnet 7,
It is arranged such that the end surface is exposed from the mounting surface 5b of the support portion 5 and is located on the same plane as the mounting surface 5b. The pickup coil 9 made of a copper wire is wound around the coil winding portion 8b, the end portion of the pickup coil 9 extends through the support portion 5 to the vicinity of the center, and the tip thereof is the connector 1
It is electrically connected to 1a, 11b, and 11c. One end of each pickup coil 9 has a common connector 11
b, and the other end is the connector 11a,
11c, respectively.

A support plate 12 is fixed to the rear surface of the mounting portion 1b so as to extend along the longitudinal direction of the ring rail 1,
A mounting portion 1 having a large number of signal lines 13 on a support plate 12
The wiring board 14 that constitutes the circuit on the b side is attached. The support plate 12 has a hole 12 at a position facing the communication hole 1d.
a is formed. The wiring board 14 has contacts 15a, 15 connected to the signal line 13 at positions corresponding to the holes 12a.
b and 15c are provided. The contacts 15a to 15c face the connectors 11a to 11c, respectively, in a state where the supporting portion 5 is fixed to the mounting portion 1b, and even if the position of the supporting portion 5 is moved on the mounting portion 1b, the connectors 11a to 11c.
It is formed on the wiring board 14 as an elongated pattern extending along the longitudinal direction of the ring rail 1 so as to be held in contact with 11c. The contact 15b that contacts the connector 11b is connected to a signal line for grounding. The wiring board 14 is covered with a cover 16 attached to the support plate 12. The signal line 13 is connected to the determination device 17, and the output signal of each pickup coil 9 is input to the determination device 17 via the signal line 13. That is, the detection head 6 has connectors 11a to 11c and contacts 15a to 15c when the support portion 5 is fixed to the mounting portion 1b.
And, it is electrically connected to the judgment device 17 as a signal processing means through the signal line 13. The determination device 17 includes a traveler 18 (see FIG. 1) from each pickup coil 9.
Also, the presence or absence of yarn breakage is determined based on an output signal (voltage pulse signal) output in synchronization with the number of revolutions shown in FIG. Further, the judging device 17 counts the number of pulses and detects the number of revolutions of the traveler from the number of pulses per unit time. The rotation speed of the traveler 18 is displayed on a display device (not shown).

Next, the operation of the device configured as described above will be described. In FIG. 5, the fixed position of the thread breakage sensor 3 when the small diameter ring 2 is used is shown by a solid line, and the fixed position when the large diameter ring 2 is used is shown by a chain line.
The thread breakage sensor 3 is fixed to the mounting portion 1b of the ring rail 1 by the screw 4 in a state where the tip of the detection head 6 does not interfere with the traveler 18 traveling on the ring 2 and is arranged at a predetermined position near the ring 2. .

The position of the thread breakage sensor 3 relative to the ring rail 1 is changed by moving the support 5 along the longitudinal direction of the ring rail 1 with the screw 4 loosened. Then, by tightening the screw 4 with the detection head 6 arranged at a predetermined position, the thread break sensor 3
Is fixed at a predetermined position. The connectors 11a to 11c provided on the mounting surface 5b of the support portion 5 penetrate the communication hole 1d and the hole 12a and the contacts 15a to 15c of the wiring board 14 in the state where the support portion 5 is supported by the mounting portion 1b. Held in contact with.

The traveler 18 and the ring 2 may be replaced in response to a change in spinning conditions. In this case, it is necessary to change the fixed position of the thread breakage sensor 3 to a position where it does not interfere with the traveler 18 or the ring 2.

When the ring 2 having a small diameter is used, the tip surface of the detection head 6, that is, the tip surface 8c of the magnetic yoke 8 is the ring 2.
The position orthogonal to the straight line extending in the radial direction (the position indicated by the solid line in FIG. 5) is the predetermined position. When the large diameter ring 2 is used, it is possible to change the position from the predetermined position corresponding to the small diameter ring 2 as shown in FIG.
The position moved by a predetermined distance to the right of (the position indicated by the chain line in FIG. 5) is the predetermined position.

For example, when changing from the state of using the small diameter ring 2 to the state of using the large diameter ring 2, FIG.
At the position indicated by the solid line at 4
Loosen. Then, the support portion 5 is moved along the longitudinal direction of the ring rail 1 and the screw 4 is tightened at a predetermined position. Next, the ring 2 is replaced. The support 5 may be fixed to a predetermined position after the support 5 is moved to a position that does not hinder the replacement of the ring 2 and the ring 2 is replaced in that state.

When the position of the thread breakage sensor 3 is adjusted, the tip end surface 8c of the magnetic yoke 8 moves in a state substantially orthogonal to a straight line extending radially from the center of the ring 2 as the support 5 moves. At this time, the amount of change in the distance between the center of the ring 2 and the tip surface 8c does not change by the same amount as the moving distance of the supporting portion 5, but becomes smaller than the moving distance of the supporting portion 5.

When the ring diameter is changed in accordance with the change of the spinning conditions, the diameter is not significantly changed and is about ± 2 mm with respect to the reference ring diameter. For example, the ring diameter of 38 mm is 38 mm. If used as a reference, ring 2 used
Has a diameter of 36 mm to 40 mm. Then, the fixed position of the thread breakage sensor 3 when using the ring 2 with the smallest diameter is
This corresponds to the state shown by the solid line in FIG. And the radius is 1m
When using a large ring 2, the moving distance of the detection head 6 to a predetermined position where it does not interfere with the ring 2 and the traveler 18 is about 3 mm. Further, the distance between the ring 2 and the center of the detection head 6 has almost the same value. That is,
As in the conventional case where the sensor is moved along the line extending from the center of the ring 2 in the radial direction, even if an error of 0.1 mm occurs in the fixed position, the ratio is 3 with respect to the required movement amount. It will be about%. Therefore, the accuracy is significantly improved.

On the other hand, when the detection head 6 is formed so as to extend in the direction orthogonal to the longitudinal direction of the support portion 5, as shown in FIG. 6, it is indicated by a chain line from a predetermined position for the small-diameter ring 2 indicated by a solid line. The moving distance to the predetermined position with respect to the large-diameter ring 2 is about 14 mm. Therefore, the required moving distance is greatly increased, and the spring type connector 11a is
When using ~ 11c, the width of the communication hole 1d and the hole 12a which allow the movement becomes long, and it becomes difficult to secure a place for forming the screw hole 1c. Further, the distance between the large-diameter ring 2 and the center of the tip end surface of the detection head 6 is about 1.5 times that of the small-diameter ring 2. Since the sensitivity of the sensor is inversely proportional to the cube of the air gap, the sensitivity of the yarn breakage sensor 3 is significantly reduced. Further, the angle formed by the straight line L connecting the center of the large-diameter ring 2 and the center of the tip surface of the detection head 6 and the tip surface of the detection head 6, that is, the tip surface 8c of the magnetic yoke 8 deviates greatly from 90 °. Correspondingly, the sensitivity of the thread breakage sensor 3 further decreases.

When the detection head 6 is formed so as to extend in the direction orthogonal to the longitudinal direction of the support portion 5, the ring rail 1 necessary for disposing the thread breakage sensor 3 at a predetermined position with respect to the ring 2 having a small diameter. The space on the rear side, that is, the distance between the ring 2 and the mounting portion 1b becomes larger than that when the detection head 6 is inclined.

When the thread breakage sensor 3 is fixed to the ring rail 1, the action of the permanent magnet 7 provided on the detection head 6 causes the ring rail 1, the ring 2, and the ring rail 1, as shown in FIG.
A magnetic circuit 19 is formed in the magnetic yoke 8 and the core body 10 by a magnetic flux from the N pole of the permanent magnet 7 to the S pole.

When the spinning yarn 20 rotates with the rotation of the spindle (not shown) during the spinning operation, the traveler 18 moves on the ring flange 2a at a speed corresponding to the rotation speed of the spinning yarn 20 unless the yarn breakage occurs. To run. And the traveler 1
The magnetic field crosses the magnetic circuit 19 once for each rotation of the ring 8 on the ring flange 2a. Traveler 18 is magnetic circuit 1
9, the magnetic flux φ of the magnetic circuit 19 changes, and a voltage V shown by the following equation proportional to the number of turns N of the coil is induced in the pickup coil 9.

V = -N (dφ / dt) Therefore, if the yarn is not broken, a pulse voltage synchronized with the rotation of the traveler 18 appears at both ends of the pickup coil 9, and the voltage is constant (0 V) in the yarn broken state. Retained.
If the pulse voltage is output from both ends of the pickup coil 9, the determination device 17 determines the normal spinning state, and if the pulse voltage is not output, determines that the yarn is broken and outputs a yarn break signal. In addition, the determination device 17 uses the pickup coil 9
By counting the number of pulses per unit time output from, the rotation speed (rotation speed) of the traveler 18 is calculated, and the rotation speed is displayed on a display device (not shown).

Since the spindle keeps rotating even in the yarn breakage state, the traveler 18 may rotate together. However, the speed at which the traveler 18 rotates due to the accompanying rotation is much slower than the rotation speed during normal operation of the ring spinning machine, even if the speed is high. Therefore, the presence or absence of yarn breakage can be determined by obtaining the output pulse period or counting the number of output pulses per unit time.

Between the ring 2 and the magnetic yoke 8, except for the air gap and the resin portion, the ring rail 1, the ring 2, the magnetic yoke 8 and the core body 10 made of a magnetic material.
Magnetic circuit 1 that passes through the magnetic body that is in continuous contact with
Since 9 is formed to reduce the magnetic resistance, a strong magnetic flux passes through the magnetic yoke 8. In particular, since the magnetic yoke 8 is formed of the pedestal portion 8a and the coil winding portion 8b, the magnetic flux passing through the pedestal portion 8a is converged by the coil winding portion 8b, and the pickup coil 9 is wound. A strong magnetic flux will pass through the coil winding portion 8b. As a result, the sensitivity of the thread breakage sensor 3 increases.

This embodiment has the following effects. (A) The yarn breakage sensor 3 is moved on the ring rail 1 in a state where the tip surface 8c of the magnetic yoke 8 is substantially orthogonal to the straight line extending in the radial direction of the ring 2, and the position is adjusted.
Therefore, the amount of movement of the support portion 5 depends on the tip surface 8c of the magnetic yoke 8.
Then, the change amount of the distance from the ring 2 becomes larger, and even if there is a slight error in the amount of movement of the supporting portion 5, the influence on the sensitivity of the thread breakage sensor 3 is reduced, and the position adjustment work is facilitated. Further, a predetermined sensitivity can be secured without using extra parts such as spacers.

(B) When the position of the yarn breakage sensor 3 is adjusted, the support 5 is linearly moved relative to the ring rail 1, so that the position adjustment work becomes easier. (C) For the position adjustment work, with the screw 4 loosened, the support 5
Is slid along the ring rail 1 to a predetermined position, and the screw 4 is tightened at that position.

(D) Since the support portion 5 of the thread break sensor 3 is fixed to the mounting portion 1b provided on the rear side of the ring rail 1, the ring rail 1 required for installing the thread break sensor 3 is fixed.
The space on the ring mounting surface can be reduced. Further, since the screw 4 for fixing the support portion 5 can be tightened from the front side of the ring rail 1, the work becomes easier.

(E) Since the detection head 6 is arranged in a state of being inclined with respect to the longitudinal direction of the ring rail 1, a space on the rear side of the ring rail 1 necessary for disposing the thread breakage sensor 3, that is, The distance between the ring 2 and the mounting portion 1b becomes smaller than that when the detection head 6 is arranged in a state of being orthogonal to the longitudinal direction of the ring rail 1.

(F) Since a plurality of (two in this embodiment) detection heads 6 are provided on one support 5 at the same pitch as the spindle pitch, position adjustment work for one support 5 is performed. Thus, the position adjustment of the plurality of weights is completed at the same time, and the labor of the adjustment work and the installation work is greatly reduced as compared with the sensor in which only one detection head 6 is provided on the support portion 5.

(G) When the support portion 5 is fixed to the mounting portion 1b of the ring rail 1, the detection head 6 is electrically connected to the ring rail side circuit via the spring type connectors 11a to 11c. . Therefore, unlike the conventional sensor, a lead wire with a sufficient length to allow movement of the sensor when adjusting the fixed position is not required, and troublesome wiring work is unnecessary and position adjustment is performed. Work becomes easier.

(H) When the sensitivity of the thread break sensor 3 is low, extra processing such as signal shaping processing is necessary so that the pulse can be judged. However, since the sensitivity of the thread break sensor 3 is high, the judging device The thread breakage determination 17 can be performed by a relatively simple process. Further, since the sensitivity is high, not only the yarn breakage can be detected by the determination device 17, but also the rotation speed of the traveler 18 can be detected.

(I) Since the permanent magnet 7, the magnetic yoke 8, the pickup coil 9 and the core body 10 are molded with resin to be unitized, they are easy to handle. (Second Embodiment) Next, a second embodiment will be described with reference to FIGS. In this embodiment, the thread breakage sensor 3 is formed for a single weight, and the fixed position can be adjusted by moving the supporting portion 5 relative to the mounting surface of the ring 2 of the ring rail 1 in an arc shape. The point that is different from the above embodiment is greatly different. That is, in this embodiment, the mounting surface of the ring 2 serves as a mounting portion for the thread breakage sensor 3. The same parts are designated by the same reference numerals and detailed description thereof will be omitted. As shown in FIG. 8, the core body 10 does not exist, and the permanent magnet 7 is arranged to be exposed from the mounting surface 5b of the support portion 5. The coil winding portion 8b of the magnetic yoke 8 is formed in a curved shape, and its tip end surface 8c is formed to extend in a direction orthogonal to the mounting surface 5b of the support portion 5.
As shown in FIGS. 7B and 8, the mounting surface 5b of the support 5 is provided with two spring-type connectors 11a and 11b electrically connected to the end of the pickup coil 9. .

The support portion 5 has a pair of insertion holes 5c (see FIG. 7).
(Shown in (b)) is formed, and the support portion 5 includes a screw 21 inserted in the insertion hole 5c and a nut 22 screwed with the screw 21.
It is fastened and fixed to the ring rail 1 via (illustrated in FIG. 7B). An arcuate long hole 23 is formed in the ring rail 1.
Two pieces (shown in FIG. 7A) are formed, and the nut 22 is arranged so as to engage with the elongated hole 23 and regulate its rotation. Both elongated holes 23 are formed concentrically, and the thread breakage sensor 3 (support portion 5) has a predetermined position corresponding to the small-diameter ring 2 (the position shown by the solid line in FIG. 7A) and the large-diameter ring 2. It plays a role of a guide portion when moving between a corresponding predetermined position (position shown by a chain line in FIG. 7A).

The ring rail 1 has a connector 11
The holes 1e (FIG.
(A) and shown in FIG. 8) is formed, the wiring board 14 is extended to a position corresponding to the hole 1e, and contacts 15a and 15b connected to the signal line 13 are arranged in the extended portion. . The contacts 15a and 15b face the connectors 11a and 11b, respectively, with the support 5 fixed to the ring rail 1, and contact the connectors 11a and 11b even if the position of the support 5 is moved on the ring rail 1. It is formed as an elongated pattern so as to be held in a state.

In this embodiment, the thread breakage sensor 3 is attached to each weight. When the fixing position of the thread breakage sensor 3 is changed due to replacement of the ring 2 or the like, the screw 21 is loosened so that the nut 22 does not separate from the elongated hole 23. When the screw 21 is loosened, the support portion 5 becomes movable along with the screw 21 along the long hole 23. Then, when the screw 21 is rotated in the screwing direction into the nut 22 after being moved to a predetermined position, the rotation of the nut 22 is restricted.
The support portion 5 is clamped and fixed to the ring rail 1 by the screw 21 and the nut 22.

The thread breakage sensor 3 is provided on the tip surface 8 of the magnetic yoke 8.
The support portion 5 provided with the detection head 6 is moved and fixed at a predetermined position so that c moves substantially orthogonal to a straight line extending in the radial direction of the ring 2. Then, even when the amount of movement is large, unlike the case of the first embodiment, the angle formed by the straight line extending in the radial direction of the ring 2 and the tip surface 8c is always maintained at 90 ° or almost 90 °. Therefore, the variation in sensitivity due to the position adjustment of the thread breakage sensor 3 is smaller than that in the first embodiment.

The present invention is not limited to the above-described embodiments, but may be embodied as follows. (1) FIG. 9A and FIG. 9 in the first embodiment.
As shown in (b), the support portion 5 may be shaped such that the mounting surface 5b faces the mounting surface of the ring 2 of the ring rail 1. As shown in FIG. 9B, the coil winding portion 8b of the magnetic yoke 8 is formed such that the tip end extends horizontally and the base end side extends vertically. Further, similarly to the second embodiment, the ring rail 1 includes connectors 11a to 11a.
A hole is formed at a position corresponding to 11c, a part of the wiring board 14 is extended to that position, and contacts 15a to 15c are provided at positions corresponding to the holes. Also in this case, almost the same effect as that of the first embodiment can be obtained.

(2) The ring rail 1 is not a crank-shaped cross section but a generally used inverted U-shaped cross section, and a mounting plate made of a magnetic material is mounted on the ring rail 1 as a mounting portion 1b. You may fix it.

(3) The number of detection heads 6 provided on the support 5 is not limited to two, but may be three or more. (4) Also in the case of the single-weight type thread breakage sensor 3, as in the first embodiment, the mounting surface 5b of the supporting portion 5 is attached to the mounting portion 1b.
It is configured to be fixed to b so that its position can be adjusted along its longitudinal direction. Then, the detection head 6 and the magnetic yoke 8 are formed so as to extend obliquely with respect to the mounting surface 1b, and the tip end surface 8c of the magnetic yoke 8 is formed so as to be orthogonal to the longitudinal direction of the magnetic yoke 8. Further, the connector 11 is attached to the mounting surface 5b.
a and 11b are provided. The positions of the communication hole 1d and the screw hole 1c of the mounting portion 1b are set according to the shape of the support portion 5. In this case, since the movement of the thread breakage sensor 3 during the position adjustment is a linear movement, the adjustment work becomes simpler than in the case of the second embodiment.

(5) In the case of the single-weight type, the fixed position can be adjusted by linearly moving the support portion 5 on the ring mounting surface of the ring rail 1, and the detection head 6 is moved relative to the straight line. It is formed to extend diagonally. Also in this case, since the movement of the thread breakage sensor 3 at the time of position adjustment is linear movement, the adjustment work becomes simpler than in the case of the second embodiment.

(6) As a structure in which the detection head 6, that is, the pickup coil 9 is electrically connected to the circuit on the side of the mounting portion 1b, the end portion of the pickup coil 9 is connected to a lead wire provided with a connector as in the conventional case, A connector connected to the connector may be provided on the mounting portion 1b side.

(7) When the mounting surface 5b of the supporting portion 5 is fixed to the ring mounting surface of the ring rail 1, the screw 2 is used.
1, the width of the elongated hole 23 is smaller than the outer diameter of the nut 22 and slightly larger than the diameter of the screw 21 instead of engaging the nut 22 screwed with the elongated hole 23 to restrict the rotation thereof. The nut 22 is a screw 2 on the back side of the ring rail 1.
It may be configured to be screwed with 1.

(8) A contact pattern may be provided on the mounting surface 5b side of the support portion 5, and a spring type connector may be provided on the mounting portion side of the ring rail 1. (9) When the mounting surface 5b of the supporting portion 5 is fixed to the ring mounting surface of the ring rail 1, a pattern such as the contacts 15a forming a circuit on the mounting portion side is formed on the ring mounting surface to support the supporting portion 5 A pattern as a connector electrically connected to the end of the pickup coil 9 may be formed on the mounting surface 5b side. Since the ring rail 1 is conductive,
For example, as shown in FIG. 10, an insulating film 25 is formed on the mounting surface where the pattern 24 forming the circuit is formed, and the pattern 24 is formed thereon. The pattern 24 is formed of, for example, conductive ink or conductive paint.
In this case, the hole 26 is formed in the ring rail 1 and the contact 1
By forming the pattern 27 for connecting 5a and the like to the signal line 13 on the wiring board 14 side so as to be continuous to the rear side of the ring rail through the hole 26, the connection between the contact 15a and the signal line 13 can be simplified. Become. In addition, an insulating film 28 (illustrated by a chain line) is formed on the wiring pattern other than the contacts 15a.
Short circuit is prevented by coating with. In this case, it is not necessary to extend the wiring board 14 below the ring rail 1.

(10) The cross-sectional shape of the magnetic yoke 8 is not limited to a circle, but may be a polygon such as a triangle, a quadrangle, a hexagon, or a non-circular shape such as an ellipse. (11) The north pole of the permanent magnet 7 may be attracted to the magnetic yoke 8. In this case, the magnetic flux emitted from the N pole of the permanent magnet 7 reaches the ring flange 2a through the magnetic yoke 8, and returns to the S pole through the ring 2 and the ring rail 1. That is, a magnetic circuit whose magnetic flux direction is opposite to that of the magnetic circuit 19 shown in FIG. 2 is formed.

The inventions other than those described in the claims which can be understood from the above embodiments and modifications will be described below together with their effects. (1) In the invention described in claim 3, the ring rail is formed in a crank shape in cross section. In this case, since the mounting portion is integrally formed, it is unnecessary to newly fix the mounting portion to the ring rail. Further, the bending rigidity is increased as compared with an inverted U-shaped ring rail having the same cross-sectional area, and the weight of the ring rail can be reduced.

(2) Claims 1 to 3 and claim 5
In the invention described in any one of the above items, a threaded hole that is screwed into a fastener inserted through a long hole formed in the support portion is formed in the attachment portion of the ring rail. In this case, the structure for fixing the thread breakage sensor 3 to the ring rail so that the position of the thread breakage sensor 3 can be adjusted becomes simple.

(3) Any one of claims 1 to 5
In the invention described in the paragraph (1), pad-shaped contacts for electrically connecting the detection head (pickup coil) to a circuit on the mounting portion side are provided on the mounting surface of the supporting portion, and the supporting portion has a predetermined position on the mounting portion side. A pad-like contact is provided at a position where it can contact the contact when it is fixed to. In this case, the durability of the contact is improved as compared with the spring type connector.

[0064]

As described in detail above, claims 1 to 6 are provided.
According to the invention described in (1), when the fixed position of the sensor is adjusted in response to the change of the diameter of the ring mounted on the ring rail, the position adjustment work can be easily performed while keeping the sensitivity of the sensor almost constant. Can be done.

According to the second aspect of the invention, since the fixed position is adjusted by linearly moving the support portion relative to the ring rail, the position adjustment work becomes easier.

According to the third aspect of the invention, since the support portion of the yarn breakage sensor is fixed to the mounting portion provided on the rear side of the ring rail, the ring of the ring rail required for installing the yarn breakage sensor. The space on the mounting surface can be reduced. Further, since the fastener for fixing the supporting portion can be tightened from the front side of the ring rail, the work becomes easier.

According to the fourth aspect of the invention, the angle formed by the straight line extending in the radial direction of the ring and the tip end surface of the magnetic yoke is large even when the amount of movement of the support portion during the position adjustment of the yarn breakage sensor is large. It is always held at 90 ° or almost 90 °, and the fluctuation of the sensitivity due to the position adjustment of the yarn breakage sensor becomes smaller.

According to the fifth aspect of the invention, since the plurality of detection heads are provided on the support portion at the same pitch as the spindle pitch, the position adjustment of one support portion can adjust the positions of the plurality of weights. Compared with a sensor which is completed at the same time and which is provided with only one detection head, the labor of adjustment work and installation work is greatly reduced.

In the invention described in claim 6, unlike the conventional sensor, a lead wire having a length to allow the movement of the sensor when adjusting the fixed position is not required, which is troublesome. Wiring work becomes unnecessary and position adjustment work becomes easier.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing a state in which a thread breakage sensor according to a first embodiment is attached.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3A is a partially broken plan view of a thread breakage sensor,
(B) is the rear view.

FIG. 4 is a partial front view of a ring rail.

FIG. 5 is a schematic plan view illustrating the operation.

FIG. 6 is a schematic plan view illustrating an operation of a yarn breakage sensor for comparison.

7A is a schematic plan view of a yarn breakage sensor according to a second embodiment, and FIG. 7B is a bottom view.

FIG. 8 is a sectional view of the same.

9A is a schematic plan view of a yarn breakage sensor of a modified example, and FIG. 9B is an enlarged sectional view taken along line BB of FIG. 9A.

FIG. 10 is a partial schematic cross-sectional view of another modification.

FIG. 11 is a plan view of a conventional device.

FIG. 12 is a schematic perspective view of another conventional device.

[Explanation of symbols]

1 ... Ring rail, 1b ... Attachment part, 2 ... Ring, 3 ...
Thread break sensor, 4 ... screw as fastener, 5 ... support,
5b ... Mounting surface, 6 ... Detection head, 7 ... Permanent magnet as magnetizing means, 8 ... Magnetic yoke, 8c ... Tip surface, 9 ... Pickup coil, 11a to 11c ... Connector, 13 ... Mounting side circuit Signal lines, 15a to 15c ... Also contacts.

Claims (6)

[Claims] 1. A yarn breakage sensor of a spinning machine for detecting the presence or absence of a yarn by utilizing an electromagnetic induction effect by a traveler made of a magnetic material rotating on a ring made of a magnetic material crossing a magnetic circuit. A spinning machine in which a supporting portion provided with a detection head in which a coil or the like is unitized is movably mounted on a ring rail in a state where the tip end surface of the magnetic yoke is orthogonal or substantially orthogonal to a straight line extending in the radial direction of the ring. Thread break sensor. 2. The support portion is formed so that the fixed position can be adjusted by linearly moving relative to the ring rail, and the magnetic yoke is provided so as to extend obliquely with respect to the straight line. The yarn breakage sensor of the spinning machine according to claim 1. 3. The support portion is formed on a mounting portion made of a magnetic material and integrally extending upward on the rear side of the ring rail so that a fixed position can be adjusted along the longitudinal direction of the ring rail. A yarn breakage sensor for the described spinning machine. 4. The support portion is formed so that a fixed position can be adjusted by moving the support portion in an arc shape relative to a ring rail, and the detection head has a tip end surface of the magnetic yoke orthogonal to a mounting surface of the support portion. The yarn breakage sensor for a spinning machine according to claim 1, wherein the yarn breakage sensor is provided so as to extend in a direction in which the yarn breaks. 5. The yarn breakage sensor for a spinning machine according to claim 1, wherein a plurality of the detection heads are provided at the same pitch as the spindle pitch. 6. A spring for electrically connecting the detection head to a circuit on the mounting portion side when the supporting portion is fixed to the mounting portion between the mounting portion of the ring rail and the mounting surface of the supporting portion. A mold connector is provided.
A yarn breakage sensor for a spinning machine according to claim 5.