EP0569772B1 - Procédé et dispositif pour la fabrication d'un nombre donné de bobines pleines croisées sur une machine de bobinage à spires croisées - Google Patents

Procédé et dispositif pour la fabrication d'un nombre donné de bobines pleines croisées sur une machine de bobinage à spires croisées Download PDF

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Publication number
EP0569772B1
EP0569772B1 EP93106780A EP93106780A EP0569772B1 EP 0569772 B1 EP0569772 B1 EP 0569772B1 EP 93106780 A EP93106780 A EP 93106780A EP 93106780 A EP93106780 A EP 93106780A EP 0569772 B1 EP0569772 B1 EP 0569772B1
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EP
European Patent Office
Prior art keywords
winding
cross
bobbins
locations
wound
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
EP93106780A
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German (de)
English (en)
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EP0569772A2 (fr
EP0569772A3 (en
Inventor
Dieter Dipl.-Ing. Möhrke
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.)
Oerlikon Textile GmbH and Co KG
Original Assignee
W Schlafhorst AG and Co
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Publication date
Application filed by W Schlafhorst AG and Co filed Critical W Schlafhorst AG and Co
Publication of EP0569772A2 publication Critical patent/EP0569772A2/fr
Publication of EP0569772A3 publication Critical patent/EP0569772A3/de
Application granted granted Critical
Publication of EP0569772B1 publication Critical patent/EP0569772B1/fr
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/06—Supplying cores, receptacles, or packages to, or transporting from, winding or depositing stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a method according to the preamble of claim 1 and an apparatus for performing this method.
  • Automatic machines producing cross-wound bobbins are generally used to rewind or wind yarn, which is supplied in the form of cops from a ring spinning machine or from a spinning station, into conical or cylindrical cross-wound bobbins.
  • the lot sizes are defined, which can also belong to different lots, that is to say, possibly different yarn parameters.
  • many years ago it was recognized that this has the disadvantage that a large number of packages which are not fully wound are produced. For this reason, this disadvantage was eliminated as early as the 1970s by successively switching off the winding units after producing full packages at the end of the lot or lot.
  • the object of the invention is to find a simplified mode which moreover allows the winding stations to be stopped in a more orderly manner, and to propose a machine producing cross-wound bobbins for carrying out this method.
  • the number of cross-wound bobbins to be produced is not always specified. Rather, it can also be possible that a certain amount of cops should be rewound with the aim of producing a maximum number of full packages from them. In this case, it is necessary to calculate the number of cross-wound bobbins before the quotient is formed, which can probably be produced from the amount of yarn available.
  • winding units are then immediately intended to have their target number increased by one if necessary during the processing of the entire lot. If this is not used, this is not a problem, since these winding units, unlike a winding unit located behind, do not cause the end of the batch to be delayed.
  • the grading of the number of cross-wound bobbins in groups is particularly advantageous with regard to the conversion to a new batch. It is particularly easy to accomplish with the calculation method according to the invention.
  • the supply of cops can then also be set in groups in automatic winding machines. For this reason, no means are necessary at each winding station to prevent the supply of cops after the stoppage.
  • This shutdown mode can be implemented particularly advantageously if the grading takes place starting from an automatic machine producing the end of the cheese.
  • a machine producing cross-wound bobbins according to the invention for carrying out the method according to the invention is described in the characterizing features of claim 8.
  • the storage locations for storing the detected number of completed bobbins can either be present in the bobbin station computers assigned to each bobbin or at a central point in the machine producing the bobbins. If they are provided in the winding unit computers, a central input device for inputting the setpoints is advantageously present, which inputs these setpoints via a data bus the winding units transmitted. However, there is also the possibility of decentralized input at the individual winding units. The completion of a package is usually recorded and counted by the winding station computer. As a result, the winding unit can be stopped easily when the setpoint is reached.
  • the control of the winding unit can be programmed in such a way that the cross-wound bobbin changer still carries out the bobbin change, that is to say also already inserts a new tube. After the change, however, the winding unit is not put back into operation.
  • the downtimes can also be determined.
  • a storage channel is provided for each winding unit.
  • the central recording of the winding station-related data also allows a comparison of the number of packages that have already been produced or the downtimes over the entire package.
  • a monitoring device can therefore readily determine if the time interval between the winding unit with the least downtime and the winding unit with the highest total of downtime becomes so large that it corresponds to the production time of a package. In this case, the monitoring device can increase the setpoint at a predetermined winding position.
  • a cross-winder has a closed transport system for caddy's which has a distribution section running along the winding units, the length can be shortened by transport locks. This means that groups of adjacent winding units of the automatic winder can be separated from the supply of cops. This separation occurs when the corresponding winding unit group has been completely decommissioned.
  • the supply of the distribution line via branch lines also allows the supply of the distribution line to be designed with the help of switches so that it is matched to the number of winding units still in operation. A diversion route then ensures that cops not supplied to the branch routes can later be distributed to the other branch routes.
  • a ring spinning machine 1 feeds an exchange section 37 to Caddy's 5 cops 3.
  • this exchange path 37 which is common to the Caddy's 5 of the ring spinning machine and Caddy's 6 of the winding machine circuit, the cops 3 and sleeves 4 are transferred to the Caddy's of the other circuit.
  • the caddies 5 of the ring spinning machine circuit with the sleeves 4 again arrive at the ring spinning machine 1.
  • the caddies 6 of the winding machine circuit with the unwound sleeves 4 also arrive at the exchange section 37 and leave them, occupied by the fresh cops 3 of the ring spinning machine 1 , again. Since such an exchange route with all the units required for carrying out the exchange has already been described in German patent application P 40 34 824.5, a detailed description can be dispensed with here.
  • the caddies 6 with cops 3 are transported further to the main feed section 7 of the automatic winder 2 and arrive at branch sections 8 and 9. On these branch sections 8 and 9 they are transported to a distribution section 16, into which they meet at junctions 8 'and 9 'arrive.
  • a controlled switch 14 is arranged, which ensures that the caddies 6 with cops 3 are distributed evenly over the two branch sections 8 and 9 present here during normal operation.
  • Head preparation units 12 and 13 are arranged on the branch lines 8 and 9. There is also no need to go into this here, since it is known to prepare cops in several stages by means of units arranged one behind the other (see for example DE 39 19 526 A1).
  • transverse transport paths 17 lead from the distribution path 16 through unwinding points 18 to a tube return path 11 common to all winding points. At this point it is pointed out that for reasons of clarity only individual caddy's 6 are shown, with two or here three caddy's 6 always being included in the reserve paths 19 Kopsen 3 are on hold.
  • the caddy's 6 leave the respective unwinding position 18 with their sleeves 4 and are fed back to the exchange section 37 via the sleeve return path 11.
  • a so-called head button 34 is arranged at the downstream end of the sleeve return path 11 in front of a branch 28, which operates on a mechanical or photo-optical basis and differentiates between empty sleeves, sleeves with very little thread residue and so-called residual cops 22.
  • the remaining bobbins 22 can, however, also be still fully wound bobbins if, for example, the thread start could not be picked up in the winding station.
  • the head button 34 is connected to two schematically illustrated switches 29 and 30, which control the caddies depending on the control result of the head button 34. If the head probe has recognized an empty sleeve 4, for example, both switches 29 and 30, which can work, for example, on an electromagnetic basis if the caddy's are partially made of ferromagnetic material, are not activated, so that the caddy 6 with the sleeve 4 on the branch 28 can go directly to the exchange route 37. If a small thread remnant has been recognized, both switches 29 and 30 are activated, as a result of which the corresponding caddy 6 is deflected twice and reaches the secondary transport path 32. A sleeve cleaning device 31, which removes the small thread residue, is arranged on this secondary transport path 32.
  • the cleaned sleeve 4 'with its caddy 6 arrives at the mouth 33 again on the sleeve return path 11. If this cleaned sleeve 4 'then passes through the button 34, it detects an empty sleeve and does not actuate the switches 29 and 30.
  • the switch 29 is activated, whereby the respective caddy 6 transports the secondary transport path 32 past the secondary transport path 38 and through a switch 25 to a branch path 39 is redirected.
  • a specific head cone preparation device 35 is arranged on this branch section 39, which searches for the beginning of the thread specifically on the head cone. After leaving this head cone preparation device 35, the caddy 6, with the remaining head 22 prepared, reaches the main feed path 7 again via the junction 40.
  • the switch 25 is normally set so that it redirects all incoming caddy's 6 to the branch line 39. However, if a sensor arranged downstream on the secondary transport path 38 detects a jam, the switch 25 is switched over, so that the caddies are fed directly to the main feed path 7 via the connecting path 24. This is necessary in order not to jeopardize the proper branching on switches 29 and 30. However, as will be explained further below, this connecting section 24 has a special meaning in connection with a lot or lot end.
  • Modern end winding machines have display and input devices in their end frame, which are connected to the individual winding units via a data bus.
  • the winding units themselves have so-called winding unit computers, in which winding unit-specific data are stored and which also directly control the winding unit.
  • winding unit computers in which winding unit-specific data are stored and which also directly control the winding unit.
  • the central control unit 36 usually present in the end frame of these winding station computers.
  • the number of cross-wound bobbins produced at each winding position is counted automatically from the start.
  • the starting point is an automatic winder with 40 winding units.
  • the target size is a number of 980 packages.
  • the quotient from division 980: 40 is 24.5. According to a first variant, rounding up and down to the next whole number would result in 20 winding positions with 24 cross-wound bobbins to be produced and 20 winding positions with 25 cross-wound bobbins to be produced.
  • a division of 10 usually corresponds to a section division of an automatic winder.
  • 23 cross-wound bobbins would be produced in the section furthest away from the delivery of the cops, while 24, 25 and 26 cross-wound bobbins would be produced in a staggered manner in the sections in front. This will take the sections out of operation in a predetermined order.
  • the division according to the second variant would be more advantageous if the production time per cross-wound bobbin is relatively short. This is the case when relatively small packages are wound from relatively coarse yarn. The time interval between the completion of the first packages and the completion the last cross-wound bobbins would therefore not be too large. In contrast, the first variant is preferable if relatively large packages are made of fine material.
  • the setpoint was reduced by one in three of the winding units that are to produce 24 packages.
  • the setpoint was increased by one for three further winding units. This results in a distribution of 23 winding units which are to produce 25 cross-wound bobbins, 14 winding units which are to produce 24 cross-wound bobbins and three winding units which are to produce 23 cross-wound bobbins.
  • This additional modification serves to correct the setpoint of a winding unit that has had considerable downtimes.
  • the setpoint for the number of cross-wound bobbins to be generated by this winding unit is automatically reduced by one.
  • the setpoint for one of the three winding units with a reduced setpoint is increased by one, that is, to 24. If such a measure is not necessary, since, as is normally the case, all winding units work approximately the same, stopping the three winding units mentioned is unproblematic since the vast majority of winding units can continue to work.
  • a reduction of two can be provided for two winding units with the highest target value 26 perform one at a time. This results in the order of 8 x 26, 14 x 25, 8 x 24 and 10 x 23. In any case, it must be ensured that, with a corresponding modification of the series of values, such a correction must also be carried out that the total number of cross-wound bobbins to be produced is reached.
  • winding positions in the program are provided as alternative winding positions if a winding unit is behind by at least the manufacturing time of a package.
  • the division can, for example, take place in such a way that 20 bobbins at 20 winding units, 20 at 19 winding units and at a further 10 winding units 18 are specified as target values.
  • analog modifications can be made in accordance with the variants already explained.
  • the corresponding variables can be calculated externally or at the central control unit of the automatic winder, provided that it is equipped with the appropriate software.
  • the expected production time of a cross-wound bobbin can be determined, taking into account average downtimes that inevitably result, for example, when changing the bobbin or breaking the thread.
  • this value is stored in the monitoring device, which is part of the central control unit 36. In this way, the monitoring device can determine when a residue from a cheese has been reached at a winding unit. The monitoring device then starts the correction in the form of reducing the setpoint by one at this winding unit. Furthermore, a predetermined other winding unit is provided with a nominal value increased by one. The selection of such a winding unit results from the examples described so far.
  • a transport lock 26 can be seen on the distribution line 16. Transport locks of this type are provided at all section boundaries of the automatic winder 2, but this is not shown here. This transport lock 26 is actuated when the rearmost section viewed from the cop feed side is completely shut down. As already described, this is done by appropriately staggering the target values for the number of cross-wound bobbins to be produced.
  • Caddy's are forwarded to the detour route 10 in the rearmost section.
  • These caddy's 6 with excess copes 21 reach the sleeve return belt 11 at the end of the diversion route 10, from where they reach the main feed route 7 again via the secondary transport route 28 and the connecting route 24, as described.
  • the stopper 27 is normally open. It is only closed if, as described, a section releases all the caddies in it.
  • the automatic winder 2 shown in the drawing has two separate branch sections 8 and 9, whereby the separation into two parts is readily possible.
  • the cops 3 or surplus copes 21 of the old batch that were still in circulation could be fed to the two front sections, while the caddies 6 to the copters of the new batch would be set up, would have to be recoded at the same time.
  • Codable caddies are described for example in DE application P 40 41 713.1. This new code would be recognized by the sensor, not shown, arranged upstream of the switch 14. The switch 14 would then let these caddies through to the branch line 9.
  • the machine producing the cross-wound bobbin is, for example, an OE or air spinning machine, the cans or flyer bobbin holders are coded instead.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (12)

  1. Procédé pour fabriquer un nombre pouvant être prédéterminé de bobines croisées pleines sur une machine automatique (2) qui fabrique des bobines croisées et à laquelle on amène en continu des bobines à dévider (3) ou, pour chaque tête de bobinage, du fil venant d'être filé, cependant que les têtes de bobinage (18) sont arrêtées a' partir d'un instant déterminé et que l'on règle l'amenée de bobines à dévider ou de fil, respectivement, aux têtes de bobinage qui ont été arrêtées, caractérisé par le fait que l'on divise le nombre pouvant être prédéterminé de bobines croisées pleines par le nombre des têtes de bobinage de la machine automatique qui fabrique les bobines croisées, par le fait que, dans le cas où le quotient n'est pas un nombre entier, on l'arrondit par excès et par défaut à des valeurs entières avec une valeur limite supérieure et une valeur limite inférieure, la somme de toutes les valeurs arrondies par excès et par défaut étant égale au nombre pouvant être prédéterminé, par le fait que l'on prédétermine a chaque fois une telle valeur pour chaque tête de bobinage, et par le fait que l'on arrête les têtes de bobinage après que l'on a atteint le nombre de bobines croisées à fabriquer qui est prédéterminé par la valeur correspondante.
  2. Procédé selon la revendication 1, caractérisé par le fait que le nombre des bobines croisées à fabriquer est calculé avant la formation du quotient par la donnée d'une quantité de bobines à dévider ou de fil, respectivement, qui doit être traitée.
  3. Procédé selon la revendication 1 ou 2, caractérisé par le fait que, pour une tète de bobinage au moins, on prédétermine un nombre de bobines croisées à fabriquer qui est inférieur à la valeur limite inférieure que l'on utilise lors de l'arrondissage, et par le fait que l'on augmente d'une unité le nombre des bobines croisées à fabriquer sur cette tête de bobinage dans le cas d'une défaillance temporaire d'une tète de bobinage de la machine automatique dont la durée totale est supérieure à la durée de fabrication d'une bobine croisée.
  4. Procédé selon la revendication 1 ou 2, caractérisé par le fait que, dans le cas d'une défaillance temporaire d'une tête de bobinage de la machine automatique dont la durée totale est supérieure à la durée de fabrication d'une bobine croisée, on augmente la valeur d'une unité sur une tête de bobinage qui est programmée avec la valeur limite inférieure.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé par le fait que les valeurs qui sont destinées à des têtes de bobinage assemblées en groupes sont prédéterminées en étant augmentées par groupes et diminuées par groupes, le nombre total des bobines croisées à fabriquer étant maintenu constant.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé par le fait qu'en commençant par une extrémité de la machine automatique, le nombre des bobines croisées à fabriquer par tête de bobinage est prédéterminé en augmentant d'un nombre plus faible a' un nombre plus élevé.
  7. Procédé selon la revendication 5 ou 6, caractérisé par le fait qu'après l'arrêt d'un groupe de têtes de bobinage, on arrête l'amenée de bobines a dévider ou de fil, respectivement, à la totalité du groupe, et par le fait que l'on libère les bobines à dévider qui sont encore emmagasinées dans ce groupe ou, respectivement, que l'on interrompt l'amenée du fil.
  8. Machine automatique (2) fabriquant des bobines croisées pour la mise en oeuvre du procédé selon la revendication 1, caractérisée par le fait qu'elle comporte des emplacements pour mettre en mémoire le nombre de bobines croisées finies par tête de bobinage qui a été détecté, et par le fait qu'il est prévu un dispositif d'entrée pour introduire des valeurs de consigne pour le nombre de bobines croisées des diverses têtes de bobinage, ainsi qu'un circuit pour arrêter les têtes de bobinage lorsque la valeur de consigne est atteinte.
  9. Machine automatique (2) fabriquant des bobines croisées selon la revendication 8, caractérisée par le fait que les emplacements de mémoire qui sont présents pour chaque tête de bobinage comportent aussi des canaux de mémoire pour mettre en mémoire les temps d'arrêt rapportés aux têtes de bobinage, et par le fait qu'il est prévu un dispositif de surveillance qui, dans le cas où, du fait de défaillances, le nombre de bobines croisées d'une tête de bobinage est en retard d'une unité par rapport à la tête de bobinage dont les durées de défaillance sont les plus faibles, réduit d'une unité la valeur de consigne de la tête de bobinage qui se trouve en retard et l'augmente simultanément d'une unité pour une autre tête de bobinage qui peut être prédéterminée.
  10. Machine automatique (2) fabriquant des bobines croisées selon la revendication 8 ou 9, caractérisée par le fait qu'une machine automatique à bobines croisées comporte un système transporteur fermé qui est destiné à des supports individuels (6) sur lesquels sont enfoncés les canettes (3) et les bobinots (4), et par le fait qu'une voie de répartition (16) qui passe le long des têtes de bobinage (18) peut être séparée partiellement de l'amenée des canettes par des dispositifs de blocage du transport (26).
  11. Machine automatique (2) fabriquant des bobines croisées selon la revendication 10, caractérisée par le fait que des embranchements (8, 9) débouchent dans la voie de répartition (16) à distance les uns des autres, qu'ils bifurquent d'une voie d'amenée principale (7), et que des aiguillages pouvant être asservis (14, 15) sont disposés à leur entrée en vue du dosage de l'amenée des canettes à la voie de répartition.
  12. Machine automatique (2) fabriquant des bobines croisées selon la revendication 11, caractérisée par le fait qu'il est prévu une voie de dérivation (10) pour recevoir les supports individuels (6) qui sont pourvus de canettes excédentaires (21) et qui ne sont pas introduits dans les embranchements (8 et 9), et pour les amener à nouveau à la voie (11) de renvoi des canettes.
EP93106780A 1992-05-15 1993-04-27 Procédé et dispositif pour la fabrication d'un nombre donné de bobines pleines croisées sur une machine de bobinage à spires croisées Expired - Lifetime EP0569772B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4216097 1992-05-15
DE4216097A DE4216097A1 (de) 1992-05-15 1992-05-15 Verfahren und Vorrichtung zum Herstellen einer vorgebbaren Anzahl voller Kreuzspulen auf einem Kreuzspulen herstellenden Automaten

Publications (3)

Publication Number Publication Date
EP0569772A2 EP0569772A2 (fr) 1993-11-18
EP0569772A3 EP0569772A3 (en) 1994-06-15
EP0569772B1 true EP0569772B1 (fr) 1997-01-22

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EP93106780A Expired - Lifetime EP0569772B1 (fr) 1992-05-15 1993-04-27 Procédé et dispositif pour la fabrication d'un nombre donné de bobines pleines croisées sur une machine de bobinage à spires croisées

Country Status (4)

Country Link
US (1) US5398878A (fr)
EP (1) EP0569772B1 (fr)
JP (1) JPH06108325A (fr)
DE (2) DE4216097A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0165741B1 (ko) * 1996-02-28 1999-01-15 김경백 권사기 상의 콥의 정방 스핀들 위치 인식 및 데이터 관리시스템과 이송구간별 콥번호 트레이스 방법
DE19648215A1 (de) * 1996-11-21 1998-06-18 Schlafhorst & Co W Verfahren zur Optimierung eines Partiewechsels an einer Offenend-Spinnmaschine
US6260783B1 (en) * 1998-02-03 2001-07-17 Georgia Tech Research Corp. Automated yarn creeling device
DE19910683A1 (de) * 1999-03-10 2000-09-14 Schlafhorst & Co W Vorrichtung zum Beliefern der Spulstellen eines Spulautomaten mit Kopsen
KR20030074566A (ko) * 2003-08-29 2003-09-19 주식회사소진 캠을 이용한 도어의 자동폐쇄장치
JP2014227249A (ja) * 2013-05-21 2014-12-08 村田機械株式会社 糸巻取機

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922642A (en) * 1970-05-26 1975-11-25 Toyoda Automatic Loom Works Automatic spinning system
DE2460252C2 (de) * 1974-12-19 1986-09-04 W. Schlafhorst & Co, 4050 Mönchengladbach Verfahren zum Herstellen von Textilspulen vorgegebener Fadenlänge
JPS5859167A (ja) * 1981-09-25 1983-04-08 Murata Mach Ltd 管糸搬送システム
JPS61178375A (ja) * 1985-01-31 1986-08-11 Murata Mach Ltd 精紡機の管理システム
JPH0749353B2 (ja) * 1986-10-06 1995-05-31 村田機械株式会社 自動ワインダ−における糸の巻取方法
JPS63225076A (ja) * 1987-03-12 1988-09-20 Murata Mach Ltd 自動ワインダ−におけるロツトチエンジ方法
JPH0633135B2 (ja) * 1987-10-19 1994-05-02 村田機械株式会社 自動ワインダのロットチェンジ方法
DE3843554C2 (de) * 1988-12-23 1994-04-07 Schlafhorst & Co W Spulautomat mit Spulenträgertransportband

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Publication number Publication date
DE59305199D1 (de) 1997-03-06
EP0569772A2 (fr) 1993-11-18
EP0569772A3 (en) 1994-06-15
US5398878A (en) 1995-03-21
DE4216097A1 (de) 1993-11-18
JPH06108325A (ja) 1994-04-19

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