EP0851946A1

EP0851946A1 - Device for the selective control of the oscillating transverse motion of a yarn, in particular the warp yarn of a loom

Info

Publication number: EP0851946A1
Application number: EP96928315A
Authority: EP
Inventors: Christian Kuoni; Marco De Angelis
Original assignee: Textilma AG
Current assignee: Textilma AG
Priority date: 1995-09-21
Filing date: 1996-09-06
Publication date: 1998-07-08
Anticipated expiration: 2016-09-06
Also published as: DE59608928D1; KR19990063643A; CN1062615C; TW357205B; US6041831A; JP3969740B2; EP0851946B1; WO1997011215A1; CN1196764A; HK1013201A1; JPH11512495A; ES2172674T3; KR100427017B1

Abstract

The device proposed for the selective control of the oscillating transverse motion of a yarn (4) includes sinkers (6) which are driven to oscillate and which are fitted with yarn carriers (22a, 22b). In order to be able to control individually a weft yarn (4) which is to be moved transversely, each of the carriers is fitted with an actuator (60) which moves the carrier out of its initial position, in which it cannot pick up a yarn, into a yarn pick-up position. This makes it simple to pick up the yarn and to control its transverse motion.

Description

Device for selectively controlling an oscillating transverse movement of a thread, in particular a warp thread of a weaving machine

Technical field

The invention relates to a device for the optional control of an oscillating transverse movement of a thread, in particular a warp thread of a weaving machine according to the preamble of claim 1.

State of the art

Devices of the type mentioned at the outset are known several times. For example, in the manufacture of patterned fabrics, dobby machines or jacquard machines are used for the optional control of the warp threads. Each warp thread is passed through the closed eye of a strand and is indirectly raised or lowered via the shafts of a dobby or the harness cord of a jacquard machine. Such devices are known, inter alia, from US-A-4 936 352, EP-B-0 421 370, EP-A-O 302 798, EP-A-O 534 523 and DE-C-40 23 512.

A disadvantage of this type of selection and movement of the individual warp threads is the considerable electronic and mechanical effort, which manifests itself in the large space requirement of the dobby or jacquard machine next to or above the weaving machine and in high costs. The more individual threads are controlled, the more expensive the solution becomes. As a further major disadvantage of existing shedding devices, regardless of whether jacquard or shaft technology, all warp threads must be used individually through the closed eyes of healds. Considerable manual or mechanical effort is required to pull in the warp threads. By guiding in the closed eye of a strand, the degree of freedom of the warp thread is restricted, so that it can only move freely in the warp direction, which is due to complex control and actuation of direct elements such as strands and indirect elements such as shafts, harness, jacquard boards, magnets etc. must be compensated for, the elements for the warp threads going through temporally different movements individually in jacquard machines or in groups in dobby machines.

In US-A-5 261 464 a device is described which has open strand eyes in a rising and falling plane. However, this device has several disadvantages. The design of the opening does not allow a thread to be coupled and uncoupled during weaving, but merely serves to pull in the warp thread while the weaving machine is at a standstill. Furthermore, only low thread densities are possible due to the design of the guide elements. The operation of the strands is associated with great mechanical effort.

Presentation of the invention

The object of the invention is to design a device of the type mentioned in the introduction such that direct control of a thread is possible, the previous closed thread openings in strands are replaced, direct elements such as a shaft or jacquard machine are dispensed with and with the selection of a single thread, in particular warp thread, is possible in a significantly smaller space.

According to the invention, this object is achieved by the characterizing features of claim 1. The driver only takes the thread when the actuator actuates the control means so that the thread engages with the corresponding driver and the thread is otherwise exposed, on the one hand, the insertion of the thread into the device is considerably easier and others, the thread can be individually controlled and taken along in the simplest way, whereby the control of the thread and thus, in the case of a weaving machine, the possibilities of patterning a fabric to be produced are significantly improved.

The device is suitable for a wide variety of applications, for example to present weft threads of different colors and qualities for detection to a weft insertion element.

The device has further significant advantages, particularly in connection with a weaving machine. The integration of the selection mechanism in the board eliminates numerous complex mechanical elements for controlling and deflecting warp threads, such as a dobby, jacquard machine, and harness. If, for example, the sinkers are arranged on shafts of a weaving machine, they no longer have to be driven irregularly, in accordance with the weave pattern, but rather evenly, for example with sinusoidal movement, and can thereby be made considerably simpler and more robust, which reduces the costs and the Operational safety increased. By dispensing with indirect control and actuation elements between the selection element and the controlled thread, the necessary forces are reduced, which considerably reduces the space and energy requirements. The warp threads are no longer firmly drawn into strands, but can be freely moved along the board in the uncoupled state. They can be connected and disconnected both during operation of the weaving machine and at a standstill, which offers advantages in terms of binding and when the threads are drawn in. Advantageous embodiments of the device are described in claims 2 to 16.

The device can be implemented in various ways. Thus, the driver can be connected in a stationary manner to the circuit board, the control means actuated by the actuator being used to feed the thread to the driver to be carried along by the circuit board if necessary. A preferred embodiment of the type mentioned describes claim 2. A fundamentally different embodiment of the invention consists in moving the driver itself from a basic position, in which no thread is carried, by means of the actuator into a driving position, in which a thread is carried out the circuit board is deflected. Advantageous embodiment variants of the second type of control are described in claims 3 and 4.

The driver of a board can optionally be effective in both directions of movement of the board. For this purpose, the driver can be fork-shaped, the fork opening being transverse to the direction of movement of the board. However, an embodiment according to claim 5 is more advantageous. The circuit board itself can also have a second driver which is effective in the other direction of movement, or the driver which is required for the other direction of movement is arranged on a further circuit board. There are different variants for the training and arrangement of the driver. The driver can be hook-shaped or at least have a notch for securely gripping the thread. The arrangement of the driver at the end of a deflectable control tongue is also particularly advantageous. The driver can be formed, for example, either by reshaping the control tongue or by mounting an individual part on the control tongue. The function of the control tongue can also be taken over by a special shaping of the circuit board already mentioned above. A further development of the control element according to claim 6 is expedient. The security for grasping the thread can be determined with improve an embodiment according to claim 7, a further development according to claim 8 being preferred.

An embodiment according to claim 9 is particularly advantageous, as a result of which the threads selected by the board are separated from other threads by means of a separating board. The latter can also limit the deflection of the control tongue or another movable control means. Claim 10 describes a particularly advantageous arrangement and design of the circuit board and the separating circuit board.

The actuator can advantageously be controlled electrically. The actuator can consist of various components, e.g. a piezoelectric element, a magnetizable coil, a permanent magnet, a memory alloy, a bimetal and others. The electrical controllability of the actuator is essential. Actuators with low energy consumption, such as piezoelectric elements. The embodiment according to at least one of claims 12 to 15 is advantageous, according to which the elements for controlling, regulating and monitoring the circuit board and for controlling the actuator are integrated in the circuit board itself. Via contacts or wireless, e.g. Optical, connections in the foot area of the circuit board and conductive layers that are integrated on or in the circuit board can be used to electrically control or regulate the actuators and to monitor the state of the deflection and thus the functionality.

The circuit board can be removed individually from the carrier and put back on, for example for repair purposes. It is advantageous to bundle several boards into groups, both for control and assembly, for example to replace the boards. Boards and dividing boards are connected to each other in the foot area by spacers, which can have different thicknesses, so that their division of the desired thread density corresponds. The elements necessary for controlling the group can either be accommodated on at least one of the boards themselves or in the foot area of the group or externally, ie outside of the board and foot area.

The embodiment according to claim 16 is advantageous, according to which the upper ends of the boards are shaped or labeled such that they support one another at the correct distance, i.e. at the distance which corresponds to the division in the foot area and that on the other hand they differ from one another at the same time so that they can be recognized and selected manually and / or by an automatic thread reading device.

The boards are expediently connected to a known control device which controls a large number of boards, so that a specific weaving pattern can be woven. Such a control device contains or can be connected to a computer and allows the input of a template (e.g. an image) e.g. using a scanner or CAD program and their implementation according to the boundary conditions of the weaving machine (thread density in warp and weft). The high and low points of the weave are converted into corresponding control signals for the drivers located in the sinkers, so that the desired weaving pattern is obtained.

Brief description of the drawings

Exemplary embodiments of the invention are described in more detail below with the aid of schematic drawings, in which:

Figure 1 shows the weaving area of a loom in a schematic representation, in side view; Figure 2 shows a device for controlling the

Warp threads, in view transverse to the thread running direction, in the cutout;

Figure 3 shows an end piece of the device

Figure 2;

Figure 4 shows a first board for controlling

Threads in view of the carriers;

Figure 5 shows the board of Figure 4 in section

V-V of Figure 4 on a larger scale;

Figure ^~ 6 cut the board of Figure 4 in Vertikal¬, as a detail and in grös¬ sera scale;

FIG. 7 shows a plurality of printed circuit boards and separating boards arranged on a base, in a view and in a cut-out transverse to the thread running direction;

Figure 8 shows another board in view of the driver;

Figure 9 shows the board of Figure 8 in section

IX-IX of Figure 8;

Figure 10 shows another board in view of the driver; and

Figure 11 shows the board of Figure 10 in section

XI-XI of Figure 10. Ways of Carrying Out the Invention

FIG. 1 describes a device for the optional control of an oscillating transverse movement of a thread using the example of the control of warp threads of a weaving machine. The weaving area of such a weaving machine is shown schematically in FIG.

Figure 1 shows a warp beam 2, from which warp threads 4 are fed, which by means of sinkers 6, 6a, 6b, which are arranged on supports 8, 8a, 8b, from the rest position, i.e. the middle shed position 10 to form a shed 12 are moved up and down oscillating transversely to the direction of movement. A reed 14 serves to stop a weft thread 15 inserted into the shed 12 against a fabric edge 16. The fabric 18 is removed via a fabric tree 20. The individual sinkers 6, 6a, 6b contain drivers 22, each of which can be extended from a basic position in which no thread is carried by means of an actuator and a control means to a driving position in which thread is carried. A control device 24, which is connected to each individual circuit board 6 via lines 26, is used to actuate the following actuator, which is described in more detail below.

Each sinker contains two drivers 22a, 22b, which are each only effective in one direction of movement of the sinker 6 and deflect the warp thread 4 from the middle shed position 10 into the upper shed 28 or the lower shed 30 to form the shed 12. However, it is also possible for two sinkers 6a, 6b, which are arranged on two carriers 8a, 8b, to serve to deflect a warp thread 4 from the central shed position 10. The plate 6a can thus deflect a warp thread 4 only into the upper compartment 28, while the second plate 6b moves the warp thread into the lower compartment 30 for a coming weaving cycle. This makes it possible to operate the circuit board in double rhythm with half the frequency of the drivers in relation to the weaving frequency. The structure of weaving machines is well known, as is the drive for the carriers designed as shafts, and for this purpose reference is made, for example, to the publications cited at the beginning, in particular EP-AO 534 523.

Details of the design and arrangement of the boards are described in Figures 2 to 6. FIG. 2 shows how several circuit boards 6 are lined up on a carrier 8 in a certain division, each circuit board 6 being assigned a separating circuit board 32 on both sides, the spacings of which are determined by spacers such as spacers 34 which are located on the carrier 8 between the circuit boards are lined up. At both ends of the carrier, an end piece 36 is arranged and fastened, which fix the boards 6, 32 and the spacers 34 in position on the carrier 8 and which are also used in a manner not shown for the supply of energy and / or data exchange can. At the end region facing away from the carrier 8, the boards 6 and the separating boards 32 are provided with further spacers 38, which are formed, for example, by bulges in the board housing. These spacers limit the mutual spacing of the sinkers and moreover have guide surfaces 39 for the passage of a thread. The separating boards 32 serve on the one hand as a stop for extended drivers 22a, 22b and on the other hand for separating warp threads 4a which are not to be processed on the respective board 6. The processing of a large number of threads can also be distributed over different sets of sinkers, as indicated by sinker sets I and II in FIG. 1. The warp thread density can be increased by such staggering of the sinkers on carrier levels lying one behind the other.

FIGS. 4 to 6 show details of the structure of a circuit board used in FIGS. 1 to 3. The circuit board has a housing formed from two shells 42a, 42b 42, the shells 42a, 42b being welded to one another at the edges 44, for example. The housing has a foot part 46 with two legs 48 which clasp the carrier 8, so that the circuit board can be plugged on and / or pushed on the carrier. The circuit board can also be connected to the carrier in any other way, for example by screwing, gluing and the like. The board also contains a head part 50, via which the individual threads are fed. A pair of drivers 22a, 22b are arranged on each side between the foot part 46 and the head part 50, which are each effective in both directions of movement of the board. The drivers are fastened to the end of a control means, which is designed as a control element in the form of a control tongue 52, which is fastened with its other, the fastening part 54, to a reinforcing layer 56 in the housing 42 by gluing and / or pins 58. An actuator 60 is attached to the control tongue, which can be made from a wide variety of materials, but preferably consists of spring steel, and is designed, for example, as a piezoelectric element. This actuator 60 is activated by means of conductor tracks 64, which are arranged on an intermediate layer 62. As soon as current is applied to the actuator 60 via the conductor track 64, the control tongue 52 bends out, as a result of which the hook-shaped driver 22b, which in the basic position lies within the housing 42 of the circuit board, through the opening 66 in the housing 42 is moved outwards into the driving position, as shown in FIGS. 2 and 6, and in this position takes a warp thread 4 with the up and down movement of the plate.

The actuators 60 of the drivers 22a, 22b on both sides of the board are connected via the conductor tracks 64 to a circuit 68, which is, for example, an integrated circuit, called IC, and is likewise arranged within the housing of the board. The circuit is used for way to control and monitor the actuators 60. The circuit is connected to contacts 72 in the foot part 46 via a plurality of conductors 70, which are used, for example, for the supply of energy and / or for data exchange. The contacts 72 are connected to further contacts 74 in the carrier 8, which in turn are connected via lines 26 to the external control device 24, which controls the board or the drivers 22a, 22b of the board according to the pattern, so that the warp threads 4 in the sense of fabric pattern can be taken from the boards.

In contrast to the individual arrangement of the circuit boards 6 and the separation boards 32 on the carrier 8 according to FIG. 2, FIG. 7 shows how a plurality of such boards 6c and separation boards 32a are combined to form a group and cast into a common base 76 or otherwise are attached, such as glued. The base 76 can in turn be attached to the carrier 8 in the manner already described above. In this example, the boards 6c are connected via lines 64a to a circuit 68a common to all boards in the group. The lines 70a for supplying energy and / or for data exchange for the circuit 68a are here parallel to the carrier 8. The conductors used for data exchange can be designed as channels 70b for the transmission of optical signals, which are not shown in detail with the Conductors of an adjacent base are connected. The conductors 70a and / or channels 70b are connected directly or indirectly to a transmission device 77, which is arranged at the end of the carrier, for energy and / or for data exchange for controlling the circuit boards. Instead of supplying energy via a line from the outside, a battery for supplying energy can be arranged in the base.

Figures 8 and 9 show the section of a further circuit board 6d, in which the control means, for example as a membrane 78 are configured, which can be part of the housing 82. The membranes 78 carry actuators 60a. The membranes 78 are moved in and out as needed by means of the actuators 60a from a basic position inside the housing 82 into a driving position in which they protrude from the housing.

FIGS. 10 and 11 show a further variant of a circuit board 6e in the cutout, the control means being designed as deflection means and having deflection tongues 84 which are arranged in pairs on each side of the housing 86 and are provided with actuators 60b. The deflection tongues cover drivers 22d in their foot area, which are arranged in a stationary manner in the housing 86 of the circuit board 6e. In the driving position, the free end 88a of a deflecting tongue 84a projects outward into the displacement path of the thread 4 and the free end 88b of the other associated deflecting tongue 84b points inwards and forms a slideway for guiding the thread 4 against the driver 22d. In the basic position, both deflecting tongues 84a and 84b point inwards and thus prevent the thread 4 from being carried along.

REFERENCE LIST

2 warp construction *

4 warp threads

6 board

6a circuit board

6b circuit board

6c board d board e board

Carrier a Carrier b Carrier 0 Middle compartment position 2 Shed 4 Reed 5 Weft 6 Edge of fabric 8 Fabric 0 Department tree 2 Carrier 2a Carrier 2b Carrier 2c Carrier 2d Carrier 4 Control unit 6 Line 8 Upper compartment 0 Lower compartment 2 Separating board 2a Separating board 4 Spacer 6 End piece 8 Spacer 9 Guide surface Housing a Shell b Shell Edge Foot part Leg Head part Control tongue (control means) a Control tongue (control means) b Control tongue (control means) Fastening part Pins Actuator a Actuator b Actuator intermediate layer Conductor opening Circuit a Circuit Conductor a Conductor b Channel contact a Contact Contact Base transmission device Membrane housing a Deflection tongue (control means) b Deflection tongue (control means) housing

Claims

PATENT CLAIMS

1. Device for the optional control of an oscillating transverse movement of a thread (4,4a), in particular a warp thread of a weaving machine, with at least one sinker (6, 6a, 6b, 6c, 6d, 6e) with at least one driver (22 , 22a, 22b, 22c, 22d) for the thread (4,4a), characterized in that it comprises a control means (52, 52a, 52b, 78, 84a) which can be actuated by means of an actuator (60, 60a, 60b) , 84b) to bring the thread into engagement with the driver.

Apparatus according to claim 1, characterized in that the control means is designed as a deflecting means, preferably deflecting tongue (84a, 84b), which by means of the actuator (60b) between a basic position in which the thread (4) is not carried along, and a driving position, in which the thread is deflected against a driver (22e) connected to the circuit board (6e), can be moved in an oscillating manner (FIGS. 10 and 11).

Device according to claim 1 or 2, characterized gekennzeich¬ net that the control means is designed as a control element, preferably control tongue (52,52a, 52b), which carries the driver (22a, 22b) and by means of the actuator (60) between a basic position in which there is no thread entrainment and a entrainment position for thread entrainment can be moved (FIGS. 2, 4 and 6).

4. The device according to claim 3, characterized in that the control element is designed as a membrane (78) which can be part of the housing (82) and which carries the driver (22c) (Figures 8 and 9).

5. Device according to one of claims 1 to 4, characterized in that the driver (22,22a, 22c, 22d) is only effective in one direction of movement of the board (6,6a, 6b, 6c, 6d, 6e) and that Circuit board has a further driver (22b) which is effective in the other direction of movement.

Device according to one of claims 2 to 4, characterized in that the control element has areas of different stiffness, for example a first area associated with a foot of the control element is preferably more flexible than a second area facing the driver.

7. Device according to one of claims 1 to 6, characterized in that the board (6, 6a, 6b, 6c, 6d, 6e) on the side of the driver (22, 22a, 22b, 22c, 22d) has a separating board (32,32a) is assigned, against which the control means (52,52a, 52b, 78,84a, 84b) is applied in the driving position.

Device according to claim 7, characterized in that spacers (34, 38) are arranged between the boards (6, 6a, 6b, 6c, 6d, 6e) and the separating board (32, 32a), an upper spacer ( 38) has guide surfaces (39) which allow the thread (4) to pass through.

9. Device according to one of claims 1 to 8, characterized in that it for controlling one or more threads (4,4a) a plurality of arranged on a carrier (8, 8a, 8b) or distributed over several carriers arranged plates (6, 6a, 6b, 6c, 6d, 6e), it being possible for separating boards (32, 32a) to be arranged between adjacent boards.

10. Device according to one of claims 1 to 9, characterized in that the boards (6, 6a, 6b, 6c, 6d, 6e) and the separating boards (32, 32a) on the carrier (8) individually or via a base (76 ) are interchangeably arranged in groups.

11. Device according to one of claims 1 to 10, characterized in that the actuator (60, 60a, 60b) is designed to be electrically controllable and can preferably be connected to a separate control device (24).

12. The device according to one of claims 1 to 11, characterized in that the circuit board (6, 6a, 6b, 6c, 6d, 6e) at least one at least partially conductive layer (62) for controlling the actuator (60, 60a, 60b) and / or monitoring the condition of the board.

13. Device according to one of claims 1 to 12, characterized in that for a single circuit board (6, 6a, 6b, 6c, 6d, 6e) or a group of circuit boards a circuit (68,68a) for control and / or Contains regulation and / or monitoring.

14. Device according to one of claims 11 to 13, characterized in that the circuit board (6, 6c) has a foot part (46) or base (76) which has a contact part (72, 72a) for connecting a control line (26) has.

15. The device according to one of claims 1 to 14, characterized in that the circuit board (6, 6c) and / or a base (76) connected thereto and / or support (8) for the circuit board (6) or the base (76 ) has or have an electro-optical device (70, 70a, 72, 72a, 77) for data transmission.

16. Device according to one of claims 1 to 15, characterized in that the upper ends of the boards (6, 6a, 6b, 6c, 6d, 6e) are designed such that they are each different from adjacent boards, for example due to their geometry and / or optical elements such as a light emitting diode.