EP1314803B1 - Dispositif pour détecter de jeu entre des cylindres d'étirage d'un métiers à filer - Google Patents

Dispositif pour détecter de jeu entre des cylindres d'étirage d'un métiers à filer Download PDF

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Publication number
EP1314803B1
EP1314803B1 EP20020026353 EP02026353A EP1314803B1 EP 1314803 B1 EP1314803 B1 EP 1314803B1 EP 20020026353 EP20020026353 EP 20020026353 EP 02026353 A EP02026353 A EP 02026353A EP 1314803 B1 EP1314803 B1 EP 1314803B1
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EP
European Patent Office
Prior art keywords
looseness
roller
detecting
shafts
drafting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP20020026353
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German (de)
English (en)
Other versions
EP1314803A2 (fr
EP1314803A3 (fr
Inventor
Yoshimasa K.K. Toyota Jidoshokki Fujii
Yutaka K.K. Toyota Jidoshokki Shinozaki
Kiwamu K.K. Toyota Jidoshokki Niimi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
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Toyota Industries Corp
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Publication date
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Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of EP1314803A2 publication Critical patent/EP1314803A2/fr
Publication of EP1314803A3 publication Critical patent/EP1314803A3/fr
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/22—Driving or stopping arrangements for rollers of drafting machines; Roller speed control
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/74—Rollers or roller bearings
    • D01H5/82—Arrangements for coupling roller sections

Definitions

  • the present invention relates to a device for detecting looseness in the drafting rollers of a spinning machine and, more specifically, to a device for detecting looseness in the drafting rollers of a spinning machine equipped with a drafting device which is equipped with a plurality of bottom rollers each consisting of a plurality of roller shafts connected with each other through threaded engagement of screw portions formed at the ends thereof, each bottom roller being divided into two line shafts and arranged coaxially, each line shaft being driven from the machine base end side.
  • roving supplied from a roving bobbin is drafted by a drafting device and sent out from a front roller before it is taken up by a bobbin rotating integrally with the spindle by way of a snail wire, an anti-node ring, and a traveler traveling on the ring.
  • a drafting device 51 is of a three line type consisting of front roller 52, middle roller 53, and back roller 54, and as shown in Fig.4, front bottom roller 52a, middle bottom roller 53a, and back bottom roller 54a are driven by a single motor 55.
  • a Device for detecting iregularities in the rotational angle of drafting rollers is known from US 4 561 152-A1.
  • each of the bottom rollers 52a through 54a consists of a plurality of roller shafts 56 which are connected with each other through threaded engagement of male screw portions 56a and female screw portions 56b formed at the ends thereof so as to be formed into a single line shaft.
  • the fastening direction of each screw is generally determined according to the direction of the load received by each of the bottom rollers 52a through 54a.
  • each of the bottom rollers 52a through 54a adapted to draft and send out roving R are designed so as to be fastened when rotated in the fiber bundle (roving) sending out direction (counterclockwise in Fig. 5).
  • the load acting on the back roller 54 of the drafting device 51 is a resultant force of a reaction force F1 for drawing in roving R and a pulling force F2 applied by the middle roller 53 through the fiber.
  • the forces F1 and F2 are in opposite directions, the load acting when rotating the back bottom roller 54a fluctuates depending upon the magnitude relationship between the forces F1 and F2.
  • a large difference is generated in the load acting on the roller shafts 56 constituting the back bottom roller 54a due to non-uniformity, etc.
  • the present invention has been made in view of the above problem in the prior art. It is an object of the present invention to provide a device for detecting looseness in drafting rollers of a spinning machine for use in a drafting device of the type in which a bottom roller consisting of a plurality of roller shafts connected to each other through threaded engagement of screw portions formed at the ends thereof is divided into two line shafts and in which each line shaft is driven from the machine base end side, wherein it is possible to detect generation of looseness in the screw portions of the roller shafts.
  • each bottom roller consists of a plurality of roller shafts connected to each other through threaded engagement of screw portions formed at the ends thereof, and is divided in the longitudinal direction into two line shafts.
  • the line shafts are arranged coaxially, and driven from the machine base end side.
  • detecting means which detects looseness in the roller shafts on the basis of rotation or axial movement of that roller shaft of the plurality of roller shafts constituting the back bottom roller which is situated at the end on the side opposite to the driving side.
  • the detecting means can detect the looseness on the basis of rotation of the roller shaft situated at the end on the side opposite to the driving side.
  • looseness in the roller shafts is detected on the basis of rotation of the roller shaft situated at the end on the side opposite to the rotating side of the line shaft. Rotation due to looseness in any one of the plurality of roller shafts constituting the line shaft is reflected in the roller shaft situated at the above-mentioned end, so that by detecting rotation of that roller shaft, it is possible to detect generation of looseness in the roller shafts constituting the line shaft.
  • the gap between the line shafts is small, so that it is difficult to accurately detect movement that is attributable to looseness in the screw portions while excluding the influence of expansion of the line shafts due to thermal expansion.
  • rotation of the roller shaft it is possible to perform detection with sufficient accuracy even if the moving amount of the roller shaft per rotation of the roller shaft is small.
  • the detecting means can detect the above-mentioned looseness on the basis of relative rotation between the roller shaft situated at the end on the side opposite to the driving side and the roller shaft situated at the driving side end.
  • the position of the driving side end of the line shaft is used as a reference, and looseness in the roller shafts is detected on the basis of relative rotation of the roller shaft situated at the end on the side opposite to the driving side with respect to it.
  • the detecting means can detect the above-mentioned looseness on the basis of relative rotation between opposing roller shafts situated at the end on the side opposite to the driving side.
  • both line shafts are loosened simultaneously and in the same manner, the above-mentioned roller shafts make no relative rotation, and it is impossible to detect the looseness.
  • this does not lead to any substantial problem since the probability of both line shafts loosening in the same manner is very low.
  • the above-mentioned detecting means is provided in each of the drafting device.
  • the above-mentioned detecting means is provided in each of the drafting device, and the detecting means detect the above-mentioned looseness on the basis of rotation of four roller shafts situated at the end on the side opposite to the driving side.
  • the detecting means may be provided with a proximity switch as the detecting portion, and the roller shaft on the portion-to-be-detected side may be provided with one or more recesses such that its section in the portion corresponding to the proximity switch is recessed relative to the section around the same.
  • the detecting means may be provided with a proximity switch as the detecting portion, and the roller shaft on the portion-to-be-detected side may have a substantially D-shaped section in the portion corresponding to the proximity switch.
  • the possibility of erroneous detection due to the influence of lint is lower as compared with the case of the detecting portion which detects any photoreception or the photoreception amount of the photoreceptor portion as in an optical sensor.
  • the section of the roller shaft portion constituting the portion to be detected has a substantially D-shaped sectional configuration, the portion to be detected is not in the way when arranging the guide plate for the fiber bundle on the downstream side of the back bottom roller as in the case in which the portion to be detected protrudes from the peripheral surface of the circular portion.
  • Fig. 1 is a schematic plan view of a drafting device in which top roller is omitted.
  • a drafting device 11 is of a three-line type construction equipped with a front bottom roller 12, a middle bottom roller 13, and a back bottom roller 14 as the drafting rollers.
  • Each of the bottom rollers 12 through 14 is divided into two line shafts: 12a and 12b, 13a and 13b, 14a and 14b, and the line shafts of each pair: 12a and 12b, 13a and 13b, 14a and 14b are arranged coaxially.
  • the line shafts 12a through 14a and 12b through 14b are each driven from the ends of the machine base by driving motors 15a and 15b.
  • the line shafts 12a through 14a are operationally connected by a gear row (drive gearing) (not shown) contained in a gear box 16a arranged at one end of the machine base.
  • the line shafts 12b through 14b are operationally connected by a gear row (drive gearing) (not shown) contained in a gear box 16b arranged at the other end of the machine base.
  • Rotation of the driving motors 15a and 15b is transmitted to the gear boxes 16a and 16b through a belt transmission mechanism 17.
  • the driving motors 15a and 15b are speed-change controlled by a machine base control device 19 through an inverter 18.
  • each of the line shafts 12a through 14a and 12b through 14b consists of a plurality of roller shafts 21 connected to each other through threaded engagement of male screw portions 21a and female screw portions 21b formed at the ends thereof.
  • Fig. 2a shows the line shafts 14a and 14b of the back bottom roller 14.
  • both roller shafts 21 situated at the end on the side opposite to the driving side are supported by bearings 20a at opposing ends thereof. Further, the roller shafts 21 are supported by bearings 20b in the vicinity of the connecting portions thereof.
  • the back bottom roller 14 is equipped with detecting means for detecting looseness in that roller shaft 21 of the plurality of roller shafts 21 constituting the back bottom roller 14 which is situated at the end on the side opposite to the driving side.
  • the detecting means is designed so as to detect looseness in the roller shafts on the basis of rotation of the roller shaft 21 situated at the end on the side opposite to the driving side.
  • the above-mentioned looseness is detected on the basis of relative rotation of the roller shaft 21 situated at the end on the side opposite to the driving side and the roller shaft 21 situated at the driving side end.
  • the detecting means is equipped with proximity switches 22a and 22b as detecting portions arranged at positions corresponding to the roller shaft 21 situated at the end on the side opposite to the driving side of the line shafts 14a and 14b and proximity switches 23a and 23b (See Fig. 1) as detecting portions arranged at positions corresponding to the roller shaft 21 situated at the driving side end.
  • the roller shafts 21 situated at the driving side ends of the line shafts 14a and 14b are free from looseness, so that one proximity switch 23a, 23b is provided for each of the line shafts 14a and 14b that each consist of two line shafts.
  • each of the roller shafts 21 on the portion-to-be-detected side has a substantially D-shaped sectional configuration at a position corresponding to the proximity switch 22a, 22b, 23a, 23b, with a flat portion 21c being formed in a part of the cylindrical peripheral surface.
  • the positions of the flat portions 21c are determined such that there is a phase deviation of 180 degrees between the positions corresponding to the proximity switches 22a and 22b and the positions corresponding the proximity switches 23a and 23b.
  • the machine base control device 19 is equipped with a CPU 24, a ROM 25, a RAM 26, an input device, and an input/output interface (not shown).
  • the CPU 24 controls the driving motors 15a and 15b through the inverter 18, and controls a motor (not shown) for driving a lifting driving system and a spindle driving system (not shown), thus functioning as the control device of the spinning machine.
  • the machine base control device 19 is electrically connected to the proximity switches 22a, 22b, 23a, and 23b, and output signals from the proximity switches 22a, 22b, 23a, and 23b are input to the CPU 24.
  • the CPU 24, which constitutes the detecting means, makes a judgment, on the basis of a signal thereof, as to whether that roller shaft 21 of each of the line shafts 14a and 14b of the back bottom roller 14 which is situated at the end on the side opposite to the driving side has made a relative rotation with respect to the roller shaft 21 at the driving side end; when it is determined that it has made a relative rotation, an abnormality signal (looseness detection signal) is output.
  • the CPU 24 when it outputs the above-mentioned abnormality signal, the CPU 24 performs control so as to stop the operation of the spinning machine.
  • the CPU 24 constitutes a control device which stops the operation of the spinning machine when a looseness detection signal is output from the looseness detecting device of the drafting device 11.
  • the ROM 25 stores program data and various items of data necessary for the execution thereof.
  • the program data includes various fiber materials, spinning conditions, such as spinning yarn number count and number of twist, spindle rotating speed during normal operation, correspondence data regarding the rotating speeds of the driving motors for the draft driving system and the lifting driving system, a map indicating the relationship between RPM and supply electric current amount to the driving motors 15a and 15b at various winding amounts, etc.
  • the RAM 26 temporarily stores data input from the input device, results of computation processing in the CPU 24, etc.
  • the input device is used to input spinning condition data, such as spinning yarn number count, fiber type (material), maximum spindle RPM during spinning operation, spinning length, lift length, chase length, and the length of the bobbin used.
  • the operation of the device constructed as described above, will be illustrated.
  • the spinning conditions such as fiber material, spinning yarn count, and number of twist
  • the driving motors 15a and the 15b are rotated and controlled through the inverter 18 in correspondence with the spinning conditions on the basis of a command from the machine base control device 19. Further, the driving motor for the spindle driving system and the lifting system is also controlled such that it attains a predetermined rotating speed.
  • roving R runs from the back rollers of the drafting device 11 and passes between the front rollers to be thereby drafted, and is then taken up in a take-up portion (not shown) by a bobbin rotated integrally with the spindle.
  • each of the roller shafts 21 corresponding to the proximity switches 22a, 22b, 23a, and 23b has a flat portion 21c formed at one position thereof, so that when a roller shaft 21 makes one rotation, one pulse signal is output from the corresponding proximity switch.
  • Fig. 3 As shown in Fig. 3 as the normal portion, when there is no looseness, pulse signals are alternately output from the proximity switch 22a on the side opposite to the driving side end and the proximity switch 23a on the driving side end.
  • Similar looseness detection is performed on the other line shaft 14b.
  • the CPU 24 performs detection on the four line shafts 14a, 14a and 14b, 14b to see whether there is any looseness in the roller shafts 21.
  • the gap between the opposing surfaces of the pair of line shafts 14a and 14b constituting the back bottom roller 14 is as small as approximately 10 mm or less.
  • the roller shaft 21 at the end on the side opposite to the driving side also moves to the loosened side due to thermal expansion of the line shafts 14a and 14b, so that it is rather difficult to detect the moving amount due to the looseness in the screw portion while subtracting movement attributable to thermal expansion.
  • the thermal expansion of the line shafts 14a and 14b has no influence on the rotation, so that it is easy to accurately detect looseness in the screw portion.
  • This embodiment of the invention provides the following advantages:
  • the CPU 24 compares the output pulse signals of the proximity switches 22a and 22b of the pair of line shafts 14a and 14b, and when the output pulse signals of one of the proximity switches are input successively, determines that looseness has been generated in the screw portion.
  • the roller shafts 21 make no relative rotation, and it is impossible to detect movement toward the loosened side.
  • this presents substantially no problem since the probability of the two line shafts 14a and 14b being loosened simultaneously and in the same manner is very low. In this construction, it is possible to reduce the number of proximity switches, thereby achieving a reduction in cost.
  • the arrangement in which looseness in the screw portion is detected through comparison of the output pulse signals of at least two proximity switches should not be construed restrictively. It is also possible to adopt an arrangement in which it is determined that looseness has been generated when the rotation speed of the roller shaft 21 as computed from the output pulse generation interval of the proximity switch 22a for detecting rotation of the roller shaft 21 situated at the end on the side opposite to the driving side is different from the rotation speed thereof as computed from the rotation speed of the driving motors 15a and 15b.
  • the detecting portions (sensors) constituting the detecting means are not restricted to the proximity switches. It is also possible to use sensors, such as magnetic sensors or optical sensors.
  • the CPU 24 of the machine base control device 19 detects looseness in the roller shafts 21 on the basis of rotation of the roller shaft 21 situated at the end on the side opposite to the driving side.
  • the pulse signals may be output simultaneously from them, each output signal being input to an AND circuit.
  • H-level signals are input to the AND circuit with the same timing, so that the output is at the H-level in the while.
  • H-level signals are not simultaneously input to the AND circuit, and its output is at the L-level.
  • the drafting device 11 is not restricted to the three-line type; it may also be a device having four or more drafting rollers on one side.
  • the present invention is applicable not only to a ring spinning machine equipped with the drafting device 11 on either side but also to a ring spinning machine performing spinning on one side only, for example, a ring spinning machine which directly spins fine spinning thread by drafting sliver skipping the stage of roving R.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (8)

  1. Dispositif pour détecter le jeu entre des cylindres d'étirage d'un métier à filer doté d'un dispositif d'étirage (11) qui est doté d'une pluralité de cylindres inférieurs (12; 13, 14) constitués d'une pluralité d'arbres (21) de cylindre reliés les uns aux autres par engagement fileté de parties de vis formées à leurs extrémités, tous les cylindres inférieurs (12, 13, 14) étant divisés en deux arbres linéaires (12a, 12b, 13a, 13b, 14a, 14b) et étant agencés coaxialement, chaque arbre linéaire (12a, 12b, 13a, 13b, 14a, 14b) étant entraíné par le côté d'extrémité de la base du métier,
       caractérisé en ce que le dispositif de détection comprend un moyen (22a, 22b, 24) de détection qui détecte le jeu entre les arbres de cylindre sur base de la rotation ou du déplacement axial de cet arbre (21) de cylindre qui fait partie de la pluralité d'arbres (21) de cylindre qui constitue le cylindre arrière inférieur (14) qui est situé à l'extrémité sur le côté opposé au côté d'entraínement.
  2. Dispositif pour détecter le jeu entre des cylindres d'étirage d'un métier à filer selon la revendication 1, caractérisé en ce que le moyen (22a, 22b, 24) de détection détecte le jeu sur base de la rotation de l'arbre (21) de cylindre situé à l'extrémité sur le côté opposé au côté d'entraínement.
  3. Dispositif pour détecter le jeu entre des cylindres d'étirage d'un métier à filer selon, la revendication 2, caractérisé en ce que le moyen (22a, 22b, 23a, 23b, 24) de détection détecte le jeu sur base de la rotation relative entre l'arbre (21) de cylindre situé à l'extrémité sur le côté opposé au côté d'entraínement et l'arbre (21) de cylindre situé à l'extrémité du côté d'entraínement.
  4. Dispositif pour détecter le jeu entre des cylindres d'étirage d'un métier à filer selon la revendication 2, caractérisé en ce que le moyen (22a, 22b, 24) de détection détecte le jeu sur base de la rotation relative entre les arbres (21) de cylindre opposés situés à l'extrémité du côté opposé au côté d'entraínement.
  5. Dispositif pour détecter le jeu entre des cylindres d'étirage d'un métier à filer selon l'une quelconque des revendications 1 à 4, caractérisé en ce que, dans un métier à filer qui présente deux dispositifs d'étirage (11) sur le côté de gauche et sur le côté de droite, le moyen (22a, 22b, 23a, 23b, 24) de détection est prévu dans chaque dispositif d'étirage (11).
  6. Dispositif pour détecter le jeu entre des cylindres d'étirage d'un métier à filer selon la revendication 2, caractérisé en ce que, dans un métier à filer qui présente deux dispositifs d'étirage (11) sur le côté gauche et sur le côté droit, le moyen (22a, 22b, 23a, 23b, 24) de détection est prévu dans chaque dispositif d'étirage et en ce que le moyen de détection détecte le jeu sur base de la rotation des quatre arbres (21) de cylindre situés aux extrémités du côté opposé au côté d'entraínement.
  7. Dispositif pour détecter le jeu entre des cylindres d'étirage d'un métier à filer selon l'une quelconque des revendications 2 à 6, caractérisé en ce que le moyen de détection comprend un commutateur de proximité (22a, 22b, 23a, 23b) comme partie de détection et en ce que l'arbre (21) de cylindre situé sur le côté de la partie à détecter présente au moins un creux en une position qui correspond au contacteur de proximité (22a, 22b, 23a, 23b) où sa section forme un creux par rapport à sa section située autour du creux.
  8. Dispositif pour détecter le jeu entre des cylindres d'étirage d'un métier à filer selon l'une quelconque des revendications 2 à 7, caractérisé en ce que le moyen de détection est doté d'un commutateur de proximité (22a, 22b, 23a, 23b) comme partie de détection et en ce que l'arbre (21) de cylindre sur le côté de la partie à détecter présente en une position qui correspond au commutateur de proximité (22a, 22b, 23a, 23b) une section essentiellement en forme de D.
EP20020026353 2001-11-26 2002-11-22 Dispositif pour détecter de jeu entre des cylindres d'étirage d'un métiers à filer Expired - Lifetime EP1314803B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001359039A JP3812426B2 (ja) 2001-11-26 2001-11-26 紡機のドラフトローラの緩み検知装置
JP2001359039 2001-11-26

Publications (3)

Publication Number Publication Date
EP1314803A2 EP1314803A2 (fr) 2003-05-28
EP1314803A3 EP1314803A3 (fr) 2003-08-13
EP1314803B1 true EP1314803B1 (fr) 2005-05-11

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ID=19170113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020026353 Expired - Lifetime EP1314803B1 (fr) 2001-11-26 2002-11-22 Dispositif pour détecter de jeu entre des cylindres d'étirage d'un métiers à filer

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EP (1) EP1314803B1 (fr)
JP (1) JP3812426B2 (fr)
DE (1) DE60204103T2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2215488B1 (es) * 2004-03-11 2005-08-01 Pinter, S.A. Perfeccionamientos en los trenes de estiraje de maquinas de hilatura.
JP2006002300A (ja) * 2004-06-18 2006-01-05 Toyota Industries Corp 紡機におけるドラフト装置の異常検出装置
CN100348792C (zh) * 2004-08-02 2007-11-14 刘志祥 细纱机紧密纺牵伸装置
CN100351445C (zh) * 2004-08-10 2007-11-28 东台纺织机械有限责任公司 带压纤维束集聚装置及集聚纺环锭细纱机
JP5853994B2 (ja) * 2013-05-30 2016-02-09 株式会社豊田自動織機 コーマ
CH711289A2 (de) * 2015-07-03 2017-01-13 Rieter Ag Maschf Kämmmaschine.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2735799A1 (de) * 1977-08-09 1979-02-22 Zinser Textilmaschinen Gmbh Streckwerk fuer spinnereimaschinen
US4561152A (en) * 1983-02-08 1985-12-31 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Draft roll system for spinning machines
JPS59150123A (ja) * 1983-02-16 1984-08-28 Toyoda Autom Loom Works Ltd 紡機におけるドラフトロ−ラ駆動機構

Also Published As

Publication number Publication date
JP3812426B2 (ja) 2006-08-23
EP1314803A2 (fr) 2003-05-28
EP1314803A3 (fr) 2003-08-13
DE60204103T2 (de) 2006-01-19
JP2003166134A (ja) 2003-06-13
DE60204103D1 (de) 2005-06-16

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