JPH0740545Y2 - Warp cutting detection device for loom and cutting thread sweeper for loom - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warp cutting device for a loom and a cutting yarn scooping device for a loom used in, for example, a water jet or air jet type loom, a rapier type or a fly type loom, and the like. More specifically, a plurality of warps unwound from a beam having flanges on both left and right ends are supplied, and weft yarns are sequentially inserted for each weaving operation and woven between the warp rows in which the plurality of warps are arranged in a row. A warp cutting detection device for a loom, which is used for a loom and detects cutting of a warp,
Also, the present invention relates to a cutting thread sweeper for a loom, which is provided in the vicinity of both the flange portions and has a plurality of scraping claws that enter the warp thread row and scrape the cut warp threads out of the warp thread row.

[0002]

2. Description of the Related Art With respect to the main warp cutting detecting device for a loom and the cutting yarn scraping device for a loom, those generally known in the prior art include, for example, JP-B-54-36718 and JP-B-56-. There was one described in Japanese Patent No. 3450.

In this type of conventional weaving machine, a row of warp threads wound around a beam is unwound, and the unwound row of warp threads is vertically separated by a heddle to separate an upper warp and a lower warp. The weft thread was configured to be inserted between the row and the lower warp row by using a rapier or an air jet. A cutting yarn scraper is generally arranged near the lower warp yarn row. This cutting thread sweeper has a plurality of sweeping claws planted in a row, and the tip of the sweeping claws enters the warp row by rotating, and the cut warp is scraped out of the warp row. Be done. Then, the cut warp yarns scraped out are detected, and the operation of the loom is stopped based on the detection. On the other hand, the beam around which the warp yarns are wound has a relatively large diameter, and the flange portion of the beam is arranged in the vicinity of the cutting yarn scraper.

[0004]

On the other hand, the width of the warp string wound around the beam becomes wider or narrower depending on the weave width. This weaving width changes depending on the number of warp threads in the warp row, the thickness of the warp threads, and the like. And the beam is
The warp row is wound around the outer circumference, but it is necessary to wind it regularly so that a warp and an adjacent warp do not intersect. As a result, the flanges provided on the left and right sides of the beam must contact the end surface portion of the wound warp thread and hold the end surface portion so that the shape of the warp thread wound around the outer periphery does not collapse. Therefore, the left and right flanges of the beam are configured to be narrower as the width of the warp row becomes narrower and wider as the width of the warp row becomes wider.

However, as described above, since the flange of the beam is located in the vicinity of the cutting yarn scraper, the width of the warp thread is changed and the flanges of the beam are changed to be narrower, for example. If this is done, there is a drawback in that the tip of the scraping claw collides with the flange of the beam as the cutting thread sweeper rotates, causing damage such as bending or breaking of the scraping claw. It was

Therefore, it is conceivable to change the disposition position of the cutting thread scraper to a position retracted from the flange of the beam and mount it. However, if the warp yarns fed in a straight line are cut, the tension applied to the warp yarns disappears, and the cut yarns contract to the warp supply side, that is, the beam side. Therefore, in order to properly scrape the cut warp yarns that are cut and located on the beam side, it is necessary to provide the cutting yarn scraper at a position close to the beam flange, but at a position retracted from the flange. In this case, there is a possibility that the cutting yarn scratching device acts on the warp yarn row in a place where the cut warp yarns do not exist, and the scraping cannot be performed. The optimum mounting position of the cutting yarn scraper differs depending on the type of yarn, the number of twists, the number of denier, the type of loom, and the like.

That is, in the prior art, the cutting thread scraper must be arranged at a position where it does not collide with other members such as beams. There is a drawback in that it may not be possible to dispose the cutting thread sweeper at optimal positions for different cutting thread sweepers depending on the number of twists, the number of denier, the type of loom, and the like.

In view of this, the scraping claws at the portions of the cutting thread scraping device facing the flanges are eliminated so that the scraping claws do not collide with the flanges.
It is also possible to give up scraping the cut warp yarns at the left and right ends of the warp yarn row in which the plurality of warp yarns are arranged in a row. However, conventionally, in the case of the warp row in which the weft threads supplied to the loom are inserted, the warp threads are frequently cut particularly at the left and right ends thereof. This is because the warp thread wound around the beam has a slightly raised portion at the left and right ends of the beam that comes into contact with the flanges, pressing the adjacent thread, and the warp thread being wound in the pressed state. Due to being issued. From the above, cutting is likely to occur particularly at both ends in the width direction of the warp row, and therefore it is not possible to give up scraping of the cut warp at both left and right ends thereof. The present invention has been conceived in view of such circumstances, and an object thereof is to avoid collision of a raking claw with a flange of a beam by a simple operation, and to cut a cutting thread raking device well. That is, the yarn can be arranged at a position where it can be scraped.

[0009]

According to the present invention, a plurality of warp yarns wound from a beam having flanges at the left and right ends are supplied, and the warp yarns are arranged in a row. Used for a loom to sequentially insert weft yarns between warp rows for each weaving operation, and a warp cutting detection device for a loom that detects cutting of the warp yarns, provided near both flange portions of the beam, A plurality of scraping claws are provided and the tip of the scraping claw enters the warp string by rotating and a cutting yarn scraper for scraping the cut warp out of the warp string, and a cutting yarn scraper Including a detection device for detecting the cut yarn scraped out,
In the cutting thread sweeper, a first state in which all of the plurality of sweeping claws can be projected to scrape out the cutting warp, and the sweeping claw portion facing the flange portion of the beam is in the flange portion. In the case of collision, it is characterized in that the scraping claw portion with which the collision is made can be changed and adjusted to a second state in which it is switched to a non-projecting state.

According to a second aspect of the present invention, a plurality of warp threads unwound from a beam having flanges at both left and right ends are supplied, and a weft thread is provided between the warp rows in which the plurality of warp threads are arranged in a row. Used in a loom to be sequentially inserted and weaved for each weaving operation, provided in proximity to both flange portions of the beam, and has a plurality of raking claws that enter the warp thread row and scrape the cut warp threads out of the warp thread row. In the provided cutting thread sweeper for a loom, the sweeping claw is in a first state in which all of the sweeping claws can project the cutting warp, and the sweeping claw portion facing the flange portion of the beam is provided. When it collides with the flange portion, the scraping claw portion that collides with the flange portion can be changed and adjusted to a second state in which it is switched to a non-projecting state.

[0011]

According to the present invention as set forth in claim 1, when the cutting thread scraper rotates, the tip of the scraping claw enters the warp thread row, and when a cutting warp thread is generated, the cutting warp thread is It is scratched out of the warp row. Then, the scraped cut warp yarns are detected by the detection device. Moreover, the cutting thread sweeping device is in a first state in which all of the plurality of sweeping claws can project to cut out the cutting warp, and the sweeping claw portion facing the flange portion of the beam is the flange portion. In the case of a collision, the scraping claw portion that collides can be switched to the non-protruding state and can be changed and adjusted to the second state in which the collision does not occur.
Even if the raking claw collides with the beam flange,
The collision can be avoided by making the scraping claw of the collision portion non-projecting.

According to the present invention as set forth in claim 2, even when the flange portion of the beam collides with the scraping pawl of the cutting thread scraping device, the colliding scraping pawl portion does not project. The collision can be avoided by switching to and changing to the second state in which the collision does not occur.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an operation explanatory view for explaining the operation of the loom to which the present invention is applied. In the figure, reference numeral 1 denotes a beam in which a plurality of warp yarns are wound in a row and wound around the outer periphery thereof, and a beam 1a is provided for abutting and holding both ends of the wound warp yarns. As the weaving operation of the loom progresses, the warp row 2 wound around the outer periphery of the beam 1 is unwound. During the movement of the warp row 2, the heddle 52 pulls the warp row 2 up and down. Be done. The weft is inserted between the upper warp row 2a and the lower warp row 2b separated above and below, and after the weft is inserted, the upper heddle and the lower heddle 52
The wefts inserted by replacing and are woven. In this state, the weft yarn is inserted between the upper warp yarn row 2a and the lower warp yarn row 2b which have been further exchanged, and the upper and lower warp yarn rows are exchanged by the function of the heddle 52, and the weft yarn is woven. This weaving operation is repeated to complete the woven fabric. It should be noted that the wide width and narrow width of the woven fabric of this woven fabric have different lateral widths of the warp rows 2 depending on the woven width, and as a result, the beam 1
Is configured such that when the width of the warp row 2 becomes narrower, the left and right flanges 1a are brought closer to each other, and conversely, when the width of the warp row 2 becomes wider, the left and right flanges 1a can be separated from each other accordingly. ing. By configuring the beam 1 in this way, the flanges 1a can be brought into contact with the left and right sides of the warp row 2 regularly wound around the outer periphery of the beam 1 without a warp and an adjacent warp intersecting each other.
By contacting with the flange 1a, it is possible to prevent the right and left portions of the warp row 2 wound around the beam 1 from collapsing.

A cutting yarn scraping device 4 for scraping the cut warp yarns out of the lower warp yarn array 2b is arranged near the lower warp yarn array 2b. This cutting thread scraper 4 is provided with respect to the rotary rail 8.
A wire support pin 5, a scraping claw 6 and a brush 7 are provided. When the rotary rail 8 rotates, the wire support pin 5, the raking claw 6 and the brush 7 rotate together, and the tip of the raking claw 6 enters the lower warp thread 2b and the lower warp thread 2b. When the cutting thread exists, the cutting thread is scraped out of the warp row. The cut-out yarn 2 ′ thus scraped out is in a state of being wound around the outer circumference of the cut-out yarn scraping device 4.

FIG. 2 is a schematic perspective view showing the cutting yarn scraping device 4 and its peripheral devices. Bearings 11 and 12 are provided at the left and right ends of the cutting thread scraper 4, and the cutting thread scraper 4 is rotatably attached to the main body of the loom by the bearings 11 and 12. The one bearing 11 is fixed to the loom body via a bolt 19, and the bearing 11 is loosened by loosening the bolt 19.
Is configured to be disengaged from the main body of the loom, and the bearing 11 can be removed from the cutting yarn scraper 4 in a state where the bearing 11 is disengaged. With this bearing 11 removed,
Insertion groove 17 formed in the rotary rail 8 (see FIG. 3)
Claw holding members 40a, 40b in which the scraping claws 6 are planted,
40c can be removed. The holding members 40a, 4
Three types of holding members 40a, 40c positioned on the left and right of the cutting thread scraper 4 and a holding member 40b positioned on the center are prepared for 0b, 40c.
Only the scraping claw 6 woven in 0c is configured to be extendable and detachable as will be described later. The raking claws 6 provided on the left and right holding members 40a and 40c constitute a raking claw adjusting portion in which the raking claws are configured to be extendable and detachable. The left and right holding members 40
The holding members a and 40c are located on the warp insertion side by a nozzle or the like and have a length of about 50 mm, and the opposite side has a length of about 500 mm.

The wire support pin 5 supports one end of a wire 9. The other end of the wire 9 is attached to the sensor 10. Further, the cutting thread scraper 4 includes a pulley 1
3 is provided, and is connected to a pulley 14 of a motor 16 by a belt 15. The rotational force of the motor 16 is rotated by the motor 16, and the cutting thread sweeper 4 is driven through the pulley 14, the belt 15, and the pulley 13. Is transmitted to the cutting thread scraper 4 to rotate integrally with the sensor 10.

As described above, when the lower warp thread 2b has a cut thread, the cutting thread 2'is scraped out of the warp thread by the scraping claw 6 and the scraped cut thread is scraped out. 2'is wound around the outer circumference of the cutting yarn scraper 4, and the winding force deforms the wire 9 into a dogleg shape as shown in FIG.
Then, the sensor 10 attached to the other end of the wire 9
Detects the pulling force due to the bending of the wire 9 into the dogleg shape, and the detection output indicating that the cutting thread 2'is generated is derived.

FIG. 3 is a cross-sectional view of the cutting yarn scraper.
The cutting thread scraper 4 has a rotary rail 8. On the outer periphery of the rotary rail 8, holding members 40a, 40
An insertion groove 17 for inserting and holding b and 40c is formed. The brush 7 is planted on the rotary rail 8 and the wire support pins are fixedly held.

FIG. 4 is a schematic configuration diagram for explaining the holding structure of the scraping claw. Epoxy resin 20 is filled in the holding members 40a and 40c provided on the left and right of the cutting thread sweeper 4 shown in FIG.
A rhizome portion 41 of a holding member 21 for holding the scraping claw 6 is embedded therein. The illustrated upper portion of the holding member 21 has a divided portion 23 that is vertically divided into three. A tubular member 22 is fitted on the outer circumference of the holding member 21, and the tubular member 22 is urged upward in the figure by the restoring force of the compression spring 42.

As shown in FIG. 4B, when the tubular member 22 is pushed down against the restoring force of the spring 42,
The split portion 23 opens outward so that the scraping claw 6 can be inserted into the split portion 23 divided into three parts. In this state, if the force of pushing the tubular member 22 downward is released, the restoring force of the spring 42 moves the tubular member 22 upward. Then, as shown in (a), the split member 23 is closed by the upward moving force of the tubular member 22, and the scraping claw 6 is fixedly held by the split member 23.

When adjusting the length of the scraping claw 6,
When the tubular member 22 is pushed down, the holding by the divided portion 23 is released, so that the raking claw 6 can be freely moved, and in this state, the protruding length of the raking claw 6 is adjusted. Not only can this be done, but the scraping claw 6 can also be pulled out.

FIG. 5 is a circuit diagram showing a control circuit used in the warp cutting detecting device. In a normal operating state in which the warp yarn 2 is not cut, the cut yarn is not detected by the sensor 10, so that a low level signal is input from the sensor 10 to the flip-flop 30. In this state, since the flip-flop 30 is in the reset state, the low-level signal is input from the flip-flop 30 to the inverter 37, the low-level signal is inverted, and the high-level signal is input to the base of the transistor 38. It is in a state of In this state, since the transistor 38 is in the conductive state, the motor driving signal is input to the motor driver 39 and the motor 46 is driven. By driving this motor 46, the entire loom is put into operation.

On the other hand, the low level signal from the flip-flop 30 is also input to the bases of the transistors 33 and 43, and the respective transistors 33 and 4 are supplied.
3 is in a non-conducting state, the operating current is not supplied to the alarm lamp 34, the buzzer 35, and the brake driver 47, and the lamp 34, the buzzer 35, and the brake driver 47 are in a non-operating state.

On the other hand, if the cutting yarn 2'is generated on the warp 2 and the cutting yarn 2'is detected by the sensor 10, the sensor 1
A high level signal from 0 is input to the flip-flop 30. Then, the flip-flop 30 is switched to the set state and the high level signal is output to the inverter 37 and the transistors 33 and 43. The high level signal input to the inverter 37 is inverted and the transistor 3
8 is input to the base of transistor 8, the transistor 38 is switched to the non-conductive state, and the motor driving signal is not input to the motor driver 39. Then, the motor 46 is stopped and the loom is deactivated. On the other hand, flip-flop 3
Each of the transistors 33 and 43, to which the high level signal from 0 is input to the base, is switched to the conductive state, the alarm lamp 34 is turned on, an alarm sound is emitted from the buzzer 35, and the brake driver 47 is braked. The operation signal is input, the brake 48 is operated, and the loom is suddenly stopped.

In this state, the operator hears the warning lamp 34 and the alarm sound from the buzzer 35 and notices that the cut warp yarn 2'has been generated, and after performing the recovery work regarding the warp cutting, the reset switch is set. Press 36. As a result, a high-level signal is input from the reset button 36 to the reset input terminal of the flip-flop 30, the flip-flop 30 is reset, and the low-level signals similar to those described above are input to the inverter 37 and the transistors 33 and 43, respectively. The loom returns to normal operating conditions.

Next, another embodiment of the present invention will be described. (1) A locking projection is formed at the root of the raking claw 6 shown in FIG. 4, and an engaging portion that engages with the locking projection is formed at the tip of the holding member 23, so that the raking claw 6 The locking projection and the engaging portion are engaged with each other in the state of being extended to the stroke end so that the raking claw 6 does not extend further, so that the raking claw 6 will not come off and be lost. You may comprise.

(2) The scraping claw 6 may be directly and detachably attached to the rotary rail 8 or the holding members 40a and 40c. In that case, for example, a thread groove is formed in the root portion of the scraping claw 6, and the rotary rail 8 or the holding members 40a, 4a.
0c is formed with a screw hole that fits the screw groove, and the scraping claw 6 is directly screwed to the rotary rail 8 or the holding members 40a and 40c to be fixed.

(3) The shape of the scraping claw 6 is a U-shaped loop, or a shape having one linear portion and a branch portion branched from the middle of the linear portion. It may be.

(4) As a method of detecting the cut warp yarn 2 ', instead of the detection by the wire, the cut warp yarn 2'which is scraped by the scraping claw may be optically detected by the light projector and the light receiver. By detecting the increase in the rotational load of the cutting thread scratching device 4 when the cutting warp thread 2'is scratched by the scraping claw and the cutting warp thread 2'is wound around the cutting thread scratching device 4. You may make it detect a cutting thread.

[0031]

According to the present invention as set forth in claim 1, when the scraping claw collides with the flange portion of the beam, the scraping claw of the colliding portion is switched to the non-projecting state to the second state. The collision can be avoided by changing and adjusting it, and it can be easily dealt with by changing and adjusting only the raking claw portion that collides with the flange portion. Moreover, the cutting warp yarn is scraped out well by the raking claw portion that does not collide with the flange portion. Therefore, it has become possible to provide a warp cutting detecting device for a loom that is excellent in workability.

According to the second aspect of the present invention, when the scraping claw for scraping the cut warp collides with the flange portion of the beam, the colliding scraping claw portion is switched to the non-projecting state. It has become possible to provide a cutting thread scraper for a loom that can avoid collision by changing and adjusting the state and can avoid collision with the flange portion by a simple operation.

[Brief description of drawings]

FIG. 1 is an operation explanatory view for explaining an operating state of a loom.

FIG. 2 is a perspective view showing a cutting thread scraping device and its peripheral devices.

FIG. 3 is a cross-sectional view of a cutting thread scraper.

FIG. 4 is a schematic structural diagram for explaining an expansion and contraction structure of a raking claw.

FIG. 5 is a circuit diagram showing an example of a control circuit used in the present invention.

[Explanation of symbols]

 4 Cutting thread scraper 8 Rotating rail 6 Scrape claw 9 Wire 10 Sensor 2 Warp thread 2'Cutting thread 21 Holding member 22 Cylindrical member 42 Spring 23 Divided part

Claims (2)

[Scope of utility model registration request] 1. A plurality of warp threads unwound from a beam having flanges on both left and right ends are supplied, and weft threads are sequentially inserted between weaving rows in which the plurality of warp threads are arranged in a row. A warp cutting detection device for a loom used for weaving a loom to detect cutting of a warp, which is provided in the vicinity of both flange portions of the beam, is provided with a plurality of raking claws, and is rotated by It includes a cutting thread scraping device that the tip of the scraping claw enters the warp thread row to scrape the cutting warp thread out of the warp thread row, and a detection device that detects the cutting thread scratched by the cutting thread scraping device. The cutting thread sweeper has a first state in which all of the plurality of sweeping claws can be projected to sweep out a cutting warp, and the sweeping claw portion facing the flange portion of the beam is the flange portion. In the case of collision with the A warp cutting detection device for a loom, characterized by being configured so as to be capable of being changed and adjusted to a second state switched to. 2. A plurality of warp threads unwound from a beam having flanges at both left and right ends, and a weft thread is sequentially inserted between the warp rows in which the plurality of warp threads are arranged in a row for each weaving operation. A cutting thread scraper for a loom, which is used in a weaving machine for weaving and is provided in the vicinity of both flange portions of the beam, and has a plurality of scraping claws that enter the warp thread row and scrape out the cut warp thread outside the warp thread row. In the ejector, when the raking claw is in a first state in which all of the claws can project to scrape out the cut warp, and when the raking claw part facing the flange part of the beam collides with the flange part. The cutting thread sweeping device for a loom, wherein the colliding scraping claw portion can be changed and adjusted to a second state in which it is switched to a non-projecting state.