EP0881313A1 - Système de contrÔle pour un cantre de tissage - Google Patents

Système de contrÔle pour un cantre de tissage Download PDF

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Publication number
EP0881313A1
EP0881313A1 EP98201380A EP98201380A EP0881313A1 EP 0881313 A1 EP0881313 A1 EP 0881313A1 EP 98201380 A EP98201380 A EP 98201380A EP 98201380 A EP98201380 A EP 98201380A EP 0881313 A1 EP0881313 A1 EP 0881313A1
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EP
European Patent Office
Prior art keywords
control system
provisions
detection
thread
controller
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.)
Withdrawn
Application number
EP98201380A
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German (de)
English (en)
Inventor
Marnix Loncke
Hans Desmet
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0881313A1 publication Critical patent/EP0881313A1/fr
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02H—WARPING, BEAMING OR LEASING
    • D02H13/00—Details of machines of the preceding groups
    • D02H13/02—Stop motions
    • D02H13/04—Stop motions responsive to breakage, slackness, or excessive tension of threads, with detectors for individual threads or small groups of threads
    • D02H13/08—Stop motions responsive to breakage, slackness, or excessive tension of threads, with detectors for individual threads or small groups of threads electrical

Definitions

  • the invention relates to a control system for monitoring the pile warp yarns of a weaving frame, more especially for detecting thread breakage and/or thread over-tension of the pile warp thread.
  • system encompasses both the aspect of a method which is applied for monitoring the pile warp threads and the aspect of a device and/or of device parts which serve for that purpose.
  • BE patent application 9500426 a thread tensioning and drawing-back device is known whereby pile warp thread keepers can be placed in front of the entry grating for monitoring the pile warp threads. These pile warp thread keepers can only detect a broken pile warp thread. Moreover a division into left and right part in relation to the middle of the weaving machine can be provided.
  • BE patent application 9600219 describes a module for tensioning and drawing back pile warp threads of a weaving machine. This module is placed in front of the weaving frame.
  • a weaving frame for modern jacquard weaving machines indeed consists of a number of doors which are disposed in the lateral direction.
  • Each door is divided in height direction into a number of rows. Those rows comprise a number of bobbins in depth direction. For large cross-wound spools the height direction is even divided into a ground floor and a first floor.
  • a module with tensioning and drawing-back device is placed in the front in each door.
  • These modules are provided with breakage and over-tension detections.
  • An example of a typical configuration is a frame with 8 doors disposed next to each other in width direction. Each door has 8 rows in height on the ground floor and 7 rows on the 1st floor, each row has e.g. 48 bobbins in depth. Such a row is on either side of a door: Side A and B.
  • 16 modules with detection elements are therefore disposed.
  • Other configurations are however possible.
  • each module therefore run a number of rows of warp threads situated one above the other which come from the row of bobbins lying behind, e.g. 48 bobbins in depth according to the previous example.
  • each row is split into 2 sub-rows or layers situated one above the other.
  • a module provided for controlling 8 rows of bobbins therefore has 16 rows for the detection elements. Two detections are provided per warp thread: one for warp thread breakage and one for over-tension. This situation is applicable for both sides of a door.
  • a row of 48 bobbins in depth is therefore split up into two layers or sub-rows of 24 warp threads.
  • In order to locate a breakage or over-tension for each thread individually, use will preferably be made of electrodes. Therefore per module 48 warp threads x 2 detections x 8 rows x 2 sides 1536 contact points are necessary. This poses a problem for the cabling in order to connect these contact points individually to a supply of electricity. Furthermore this large number of signals also has to be processed.
  • a system must be sought in order to reduce the cabling to a minimum.
  • the detection of the signals must be able to be effected very fast, but may not be burdensome for the control unit of the weaving machine. Parameters such as filter times, number of contact signals that are permitted before a weaving machine stop signal is generated, etc., must on the other hand be accessible on the control unit of the weaving machine.
  • the system must be flexibly adaptable to other configurations of weaving frame arrangements.
  • the invention provides a control system for a weaving frame from out of which pile warp threads are distributed to a weaving machine, which system comprises provisions for detecting thread breakage and/or thread over-tension of the pile warp threads, whereby the detection provisions are so connected in matrix structure with the control system that the number of the signal points to be detected by the control system is reduced to a fraction of the number originating from the detection provisions, and whereby the detection of the signals originating from the detection provisions is effected by means of one or more micro-controllers.
  • the aforementioned provisions for detecting thread breakage and/or thread over-tension per weaving frame part can very suitably be provided in a separate module, whereby the detection of the signals originating from the detection provisions is effected by means of one micro-controller per module.
  • the micro-controllers are connected via a fieldbus provision to a creel controller provision of the weaving machine.
  • the creel controller provision can very suitably consist of a microprocessor operated processing unit which processes and translates the data originating from the micro-controllers into signals for a control unit (machine controller) of the weaving machine.
  • the data originating from the micro-controllers is preferably transmitted by the creel controller provision via a fieldbus provision for parameters to the machine controller, while control parameters can be transmitted via the machine controller to the creel controller provision via the fieldbus provision for parameters.
  • the provisions for detecting thread breakage and/or thread over-tension more especially comprise thread tensioning and thread drawing-back provisions for the pile warp threads which in case of an extreme condition of those tensioning and drawing-back provisions make contact with detection electrodes.
  • the detection electrodes can very suitably consist of segmented electrodes in the form of a printed circuit provided with current paths, or of a common detection conductor destined to make contact with at least a part of the tensioning or drawing-back provisions in case of an extreme condition thereof.
  • the weaving frame is preferably split up into a number of modules.
  • the control system is explained on the basis of figure 1 for the most simplified module where 32 signals are still to be controlled.
  • the cabling per module is implemented in a matrix structure so that the number of points to be controlled is limited to 12. Through the appropriate combinations when sensing those 12 points 32 signals can nevertheless be controlled.
  • the layers through which the pile threads run are grouped in blocks of 4.
  • an electrode is required for the over-tension control: this is represented in continuous line in the drawing and is indicated by even numbers 2 up to and including 32.
  • the electrodes for thread breakage control are drawn in dashed line and are indicated by uneven numbers 1 up to and including 31. In the drawing 8 lines will be seen on the left for the cabling and on the right another 4 lines with common connection point for 4 blocks.
  • FIG 2 the global division of the control system according to the invention in an operating system of a weaving mill is explained by way of example. For the sake of clarity the description is limited to the most simple embodiment according to figure 1.
  • the sensing of the 12 signals is effected by means of a micro-controller C1 up to and including Cn per module.
  • fieldbus for weaving frame
  • Creel Fieldbus Creel Fieldbus
  • the creel controller is a microprocessor based processing unit which handles the processing of the data supplied by the micro-controllers C1..Cn. This information has to be translated into breakage or over-tension, and this per colour. At the same time a stop signal must be provided to the operating unit of the weaving machine (machine controller).
  • the fieldbus for parameters connects the various microprocessor based operating units on the weaving machine (creel controller, machine controller, jacquard controller, ).
  • the fieldbus for data is a connection between the jacquard controller and the jacquard machines.
  • the creel controller can transmit the data in relation to thread breakage and over-tension to the machine controller. There these can then be shown on a monitor. On the other hand on the monitor of the machine controller the parameters for the creel controller can be input and be transmitted via the fieldbus for parameters.
  • a central network is provided which makes a connection between on the one hand the network server and on the other hand the weaving machines.
  • this network a CAD/CAM drawing system and an administrative computer can also be included.
  • connection to the weaving machine runs via the jacquard controller. This handles the processing of the various orders to be woven and the dispatching of the data to the jacquard machines (via the fieldbus for data).
  • the frame arrangement One of the product parameters which is of importance for being able to process a certain weaving order on the weaving machine or not is the frame arrangement. For that reason it is provided that on the network server, which supports the production preparation, the frame arrangement can be identified. Once this is available this data can then be transmitted via the network to the jacquard controller. By means of the fieldbus for data this can then transmit the frame arrangement to the creel controller in order to translate the transmitted data into the correct colour by the microprocessors C1..Cn. This information can then in its turn be returned to the network server via the fieldbus for data and the network in order to process stop data and make global surveys for each machine and the entire weaving mill.
  • FIG 3 a part of a weaving frame is represented with which the operation of the control system according to the invention is illustrated; in that figure it can be seen how the pile warp thread (40) runs via a guiding reed or grating (50) to the weaving machine; the thread (40) is held tight via guiding means (41) on the free extremity of a thread tensioning and thread drawing-back provision (42) - in the example shown more especially a spring strip.
  • the strips are mounted per row between common clamping rods (43), (44); the provisions for yarn breakage and yarn over-tension detection comprise connections (45) from the clamping rods (43), (44) to a power source (not shown), and connections (46), (47), to the other pole of the aforementioned voltage supply, from non-segmented detection electrodes (48) for detecting yarn over-tension and (49) for detecting yarn breakage.
  • the electrode With non-segmented electrodes the electrode consists of an electric conductive bar which is disposed insulated in relation to the frame.
  • the drop lever or the drawing-back leaf spring makes an electric contact with the bar. Only one electric connection is provided on this bar. Should it be desired to make the division in side A and side B of the door then this bar must be divided into two insulated parts each with its own connecting point.
  • segmented electrodes can also be used.
  • a segmented electrode (60) preferably consists of a synthetic material printed circuit (61) provided with current paths (62). On one side the current paths end in contact segments (63) separated from each other and on the other sides in a connector.
  • a contact segment can consist of a clip which is clipped on to the current path or a soldered-on contact pin (64) as shown in figures 5 and 6.
  • the thread tensioning and thread drawing-back provision - such as for example the spring strip (42) shown in figure 3 - will make an electric contact with the clips or the contact pin.
  • the electrode With the connector the electrode can be linked to a flat cable. This flat cable is then linked over a matrix connecting structure to a processing unit.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP98201380A 1997-05-27 1998-04-28 Système de contrÔle pour un cantre de tissage Withdrawn EP0881313A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9700460 1997-05-27
BE9700460A BE1011179A5 (nl) 1997-05-27 1997-05-27 Controlesysteem voor een weefrek.

Publications (1)

Publication Number Publication Date
EP0881313A1 true EP0881313A1 (fr) 1998-12-02

Family

ID=3890539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98201380A Withdrawn EP0881313A1 (fr) 1997-05-27 1998-04-28 Système de contrÔle pour un cantre de tissage

Country Status (3)

Country Link
EP (1) EP0881313A1 (fr)
BE (1) BE1011179A5 (fr)
TR (1) TR199800935A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB384660A (en) * 1931-03-09 1932-12-09 Thomas Albert Briggs Carver Improvements in or connected with the guiding and tensioning of warp threads in loomsachines and the like
BE649291A (fr) * 1964-06-15 1964-12-15
EP0728857A1 (fr) * 1995-02-23 1996-08-28 Sucker-Müller-Hacoba GmbH & Co. Procédé et dispositif pour enrouler des faisceaux de fils
EP0742297A2 (fr) * 1995-05-11 1996-11-13 N.V. Michel Van de Wiele Dispositif de tension et de rappel du fil pour métier à tisser

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB384660A (en) * 1931-03-09 1932-12-09 Thomas Albert Briggs Carver Improvements in or connected with the guiding and tensioning of warp threads in loomsachines and the like
BE649291A (fr) * 1964-06-15 1964-12-15
EP0728857A1 (fr) * 1995-02-23 1996-08-28 Sucker-Müller-Hacoba GmbH & Co. Procédé et dispositif pour enrouler des faisceaux de fils
EP0742297A2 (fr) * 1995-05-11 1996-11-13 N.V. Michel Van de Wiele Dispositif de tension et de rappel du fil pour métier à tisser

Also Published As

Publication number Publication date
TR199800935A1 (xx) 1998-12-21
BE1011179A5 (nl) 1999-06-01

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