EP0319025A1 - Steuerschaltung für eine Einrichtung zur automatischen Beseitigung von falsch eingewebten Schussfäden an Webmaschinen - Google Patents
Steuerschaltung für eine Einrichtung zur automatischen Beseitigung von falsch eingewebten Schussfäden an Webmaschinen Download PDFInfo
- Publication number
- EP0319025A1 EP0319025A1 EP88120158A EP88120158A EP0319025A1 EP 0319025 A1 EP0319025 A1 EP 0319025A1 EP 88120158 A EP88120158 A EP 88120158A EP 88120158 A EP88120158 A EP 88120158A EP 0319025 A1 EP0319025 A1 EP 0319025A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- generator
- weft
- control circuit
- output
- loom
- 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- Withdrawn
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Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
- D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
- D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping
- D03D51/085—Extraction of defective weft
Definitions
- the invention relates to a control circuit for a device for the automatic removal of incorrectly woven weft threads from a web.
- the control signals for the various movements and processes are generated by a generator which contains a system of cams with associated electrical switches. These electrical switches are connected to the power elements of the automatic removal device. The electrical switches can also be operated by a step switch. If an incorrectly woven-in weft is detected by a sensor, the generator generates corresponding control signals in the correct sequence and length for actuating the actuators. After all the elimination processes have been completed, the gene rator returned to its starting position and the weaving machine started. After activating the signal generator, its operation cannot simply be interrupted, but the generator can only return to its starting position after the entire cycle. Another disadvantage is the elimination of a reaction of the generator to the initial and external conditions, such as, for example, to emergency situations and to atypical conditions for the automatic removal of incorrectly woven shots.
- the object of the invention is to provide a control circuit which overcomes the disadvantages of the prior art for a device for removing weft threads from a fabric web, operates essentially without mechanical components with greater reliability and permits interventions in the course of the removal processes.
- a miss sensor is electrically connected to an electrical control signal generator and a rotation angle sensor of the main shaft of the weaving machine is electrically connected to an auxiliary input of the control signal generator.
- a weaving machine 1, particularly one with a weft air impact, contains a device for the automatic removal of incorrectly woven-in weft threads with a sensor or sensor 2 for detecting warp thread breaks, which is arranged between the warp beam and the heddle shafts of the weaving machine and can be designed as a slat warp thread monitor .
- the output 21 of this sensor 2 is electrically connected to an input 63 of the one electrical signal generator 6.
- the circuit also contains a monitor 3 for detecting a miss, which can be designed as an optical sensor and is arranged on the output side of the compartment of the weaving machine.
- a warp thread control output 31 of the weft monitor is electrically connected to a warp thread control input 62 of the generator 6.
- Another starting output 32 of the weft monitor 3 is connected to a starting input 61 of the generator 6.
- An output 51 of a preferably electro-optical rotary angle meter 5 for the angular position of the main shaft of the weaving machine, which detects the respective angular position of the main shaft, is connected to an auxiliary input 64 of the generator 6.
- the functions of all mechanisms of the weaving machine are derived from the rotary movement of the main shaft by means of suitable transmission elements.
- the generator 6 contains a microcomputer with a semiconductor memory in which a program for generating the control signals is stored. This is associated with the control generator 6 matching circuits of the actual inputs and outputs 61 to 65.
- An output 65 is connected to the input 41 of a power unit 4 for the automatic removal of a miswoven weft, the air nozzle systems for weft insertion and removal from the compartment, a mechanism for separating a weft and a mechanism for removing a miswoven weft from the compartment Contains weaving machine.
- the circuit for automatically removing a wrongly woven shot works as follows.
- the miss-weft sensor 3 If a weft thread is woven in incorrectly, the miss-weft sensor 3 generates signals at the starting output 32, which signals are fed to the generator 6 and processed therein.
- the generator sends a corresponding signal sequence to the power unit 4, the separating mechanism of which is activated and cuts off the end of the incorrectly woven-in weft thread.
- the weft is then conveyed to the other end of the compartment and pulled out of the compartment by the mechanism for removing the incorrectly woven weft.
- the generator 6 compares the control signal of the warp thread control output 31 of the weft monitor 3 with the signal of the twist angle sensor 5.
- the power unit 4 stops the weaving machine in a position with the compartment fully open. In the case of a substitute signal, the power unit 4 stops the machine in an unspecified position. In any case, an operator is brought in to remedy the deficiency by hand and to restart the weaving machine.
- the generator 6 If the sensor 2 gives a signal at its control output 21 which indicates a warp thread break, the generator 6 generates corresponding control signals for the power unit 4, which then breaks the weft so that no bands form in the fabric and stops the machine in the lay position . The operator brought in then remedies the defect and starts the weaving machine.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS8739/87 | 1987-12-02 | ||
| CS878739A CS267635B1 (en) | 1987-12-02 | 1987-12-02 | Connection for incorrectly dragged-in wefts' automatic removal with looms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0319025A1 true EP0319025A1 (de) | 1989-06-07 |
Family
ID=5438397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88120158A Withdrawn EP0319025A1 (de) | 1987-12-02 | 1988-12-02 | Steuerschaltung für eine Einrichtung zur automatischen Beseitigung von falsch eingewebten Schussfäden an Webmaschinen |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0319025A1 (cs) |
| CS (1) | CS267635B1 (cs) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2140679A1 (cs) * | 1971-06-10 | 1973-01-19 | Te Strake Maschf | |
| EP0150763A2 (en) * | 1983-12-28 | 1985-08-07 | Nissan Motor Co., Ltd. | Loom |
| EP0236597A1 (en) * | 1986-03-11 | 1987-09-16 | Tsudakoma Corporation | Mispick removing device for a shuttleless loom |
-
1987
- 1987-12-02 CS CS878739A patent/CS267635B1/cs unknown
-
1988
- 1988-12-02 EP EP88120158A patent/EP0319025A1/de not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2140679A1 (cs) * | 1971-06-10 | 1973-01-19 | Te Strake Maschf | |
| EP0150763A2 (en) * | 1983-12-28 | 1985-08-07 | Nissan Motor Co., Ltd. | Loom |
| EP0236597A1 (en) * | 1986-03-11 | 1987-09-16 | Tsudakoma Corporation | Mispick removing device for a shuttleless loom |
Also Published As
| Publication number | Publication date |
|---|---|
| CS873987A1 (en) | 1989-06-13 |
| CS267635B1 (en) | 1990-02-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE FR IT LI |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19891208 |