CN104220659A - Device for catching and stretching a weft thread, weaving machine and method for catching and stretching a weft thread - Google Patents
Device for catching and stretching a weft thread, weaving machine and method for catching and stretching a weft thread Download PDFInfo
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- CN104220659A CN104220659A CN201380008755.XA CN201380008755A CN104220659A CN 104220659 A CN104220659 A CN 104220659A CN 201380008755 A CN201380008755 A CN 201380008755A CN 104220659 A CN104220659 A CN 104220659A
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- Prior art keywords
- weft yarn
- stretching
- holding unit
- weft
- catching
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
- D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
- D03D47/3066—Control or handling of the weft at or after arrival
- D03D47/308—Stretching or holding the weft
Abstract
Device and method for catching and stretching a weft thread (2) inserted into a shed of a weaving machine, wherein a weft thread stretching device (7) is arranged stationary on the weaving machine in an extension of an insertion path of the weft thread (2) and a guiding device (10) is adapted for limiting a displacement of the caught weft thread (2a) in a direction transverse to the moving direction of the guiding device (10) upon guiding the caught weft thread (2a) towards the weft thread holding device (9). A weaving machine with such a device is also disclosed.
Description
Technical field
The present invention relates to for catch with the device of stretching weft threads, be provided with this kind of device loom and for catching and the method for stretching weft threads.
Background technology
In order to catch the front end of the weft yarn (hereinafter referred to as " weft yarn be inserted into ") being inserted into shed open and the weft yarn in order to be inserted into the tension force fixing expected, known use in the prior art so-called " seizure weft yarn ".Catch weft yarn and the cabling and form independent shed open abreast of the warp thread by shed open, this shed open earlier can close than normal shed open via relevant shed forming device, thus the weft yarn utilizing suitable tension force to carry out access node in suitable to be inserted into.The end of the weft yarn be inserted into by fixing, is avoided the weft yarn extending beyond fabric edge after the insertion and is pulled back in fabric.
In order to avoid catching yarn, US 6,206,051 B1 is provided for the mechanism removing weft end, and it comprises weft yarn aspirator and Weft yarn tension device.When weaving cotton cloth, the leading section arriving the weft yarn be inserted into of destination is caught by Weft yarn tension device and keeps tensioning.Then, be retained on the weft yarn in shed open thus and be beaten into fabric-fell by the beating motion of reed.Weft yarn aspirator is provided with the first and second suction openings.When the leading section of weft yarn is close to the first suction opening, the suction operation of Weft yarn tension device is stopped, to be drawn in yarn aspirator the leading section of weft yarn by the first suction opening.Extra air blast on the component that is disposed in and is combined with reed can be provided, with after the indenture of reed towards the first suction opening blow air.
GB 2 009 798 A discloses a kind of weft end treating apparatus, and it comprises arranged stationary on loom and is positioned at weft yarn and inserts the aspirator of expanded range in path and the multiple endless belts for fixing weft end.Device comprises the hook component moved back and forth further, and hook component is arranged to the end of hooking and being sucked the weft yarn be inserted into that device catches, and is then injected between band this end.
Summary of the invention
The object of this invention is to provide for catch with the device of stretching weft threads, have such device loom and for catching and the method for stretching weft threads, wherein, with enough large tension force fixing weft yarn, until the free end of weft yarn is cut off, wherein, free end keeps short, and wherein, can avoid using seizure weft yarn.
This object is solved by device according to claim 1, more specifically, by for catch and the weft yarn be inserted in the shed open of loom that stretches device solve, described device comprises: weft yarn stretching device, it is positioned at the expanded range in the insertion path of weft yarn by arranged stationary on loom, and the leading section for catching the weft yarn be inserted into also stretches the weft yarn be captured; Weft yarn holding unit, it is arranged in the region of beat-up line by arranged stationary on loom, for the leading section of at least one weft yarn through beating up of fixing; And moveable guiding device, it is for guiding the weft yarn be captured towards weft yarn holding unit, wherein, guiding device is suitable for guiding weft yarn that the weft yarn limit that is captured is captured towards weft yarn holding unit transversely in the displacement in the direction of the moving direction of guiding device, wherein, guiding device is disposed on slay to move together with slay, and wherein, guiding device is positioned at and reed place and away from beat-up line in a distance, to avoid guiding device and weft yarn interfere when inserting weft.
The weft yarn being inserted into shed open is captured and stretches, to avoid the weft yarn be inserted into be pulled in shed open and/or fabric.Hereinafter, to be captured and the weft yarn that stretches is referred to as the weft yarn be captured.In one embodiment, the weft yarn be captured by weft yarn stretching device fixing, until weft yarn is sent to weft yarn holding unit.In other embodiments, at least in part when weft yarn moves to weft yarn holding unit, the weft yarn providing extra clamping device to carry out fixing to be captured.Hereinafter, the weft yarn being introduced into weft yarn holding unit is referred to as " weft yarn be introduced into ".
When guiding device moves, the weft yarn be captured is brought towards weft yarn holding unit.The arranged stationary of weft yarn stretching device is favourable, to avoid the heavy duty on the slay of loom.But when guiding towards weft yarn holding unit the weft yarn be captured, static weft yarn stretching device transversely can apply pulling function in the direction of the moving direction of guiding device on the weft yarn be captured.By providing guiding device, this guiding device is suitable for guiding weft yarn that the weft yarn limit that is captured is captured towards weft yarn holding unit transversely in the displacement in the direction of the moving direction of guiding device, the reliable transmission towards weft yarn holding unit of the weft yarn that is captured can be realized, simultaneously with the tension force fixing weft yarn limited.
Guiding device is disposed on slay, to move together with slay, thus does not need extra mechanism to move guiding device.In addition, guiding device is positioned at and reed place and away from beat-up line in a distance, to avoid guiding device and the weft yarn interfere be inserted into when inserting weft.
Upon insertion, weft yarn needs the weft yarn stretching device being arranged to exceed reed through guiding device to arrive.Only after weft yarn stretching device captures weft yarn, just need the interaction between the weft yarn that is captured and guiding device that the weft yarn be captured is moved towards weft yarn holding unit.
In a preferred embodiment, weft yarn holding unit is provided with the entrance slit between the fabric edge and the mobile route of guiding device of fabric, and entrance slit is suitable for receiving weft yarn in the mode of the longitudinal direction transverse to described weft yarn.
Within the context of the present application, entrance slit is restricted to narrow opening, and weft yarn is introduced in weft yarn holding unit by this opening.Entrance slit roughly extends along the longitudinal direction of weft yarn to be introduced at least in part, is thus suitable for receiving weft yarn in the mode of the longitudinal direction transverse to described weft yarn.In a preferred embodiment, entrance slit is at least basically parallel to the beat-up line extension of fabric.By the entrance area making guiding device and the weft yarn that is captured be moved beyond entrance slit, weft yarn is introduced in weft yarn holding unit via entrance slit.Entrance slit has the finite width of the moving direction transverse to guiding device.Owing to being limited the displacement of weft yarn transverse to moving direction by guiding device, therefore avoid guiding device and weft yarn is pushed to above or below entrance slit, instead of enter weft yarn holding unit by entrance slit.Therefore, ensure that reliable introducing, although there is the potential pulling function of weft yarn stretching device to the weft yarn be captured, specifically transversely in the pulling function in the direction of moving direction.Minimize the risk that weft yarn is impaired when inserting, otherwise this impaired meeting causes breakage of weft, the remainder of weft yarn is no longer enough to by weft yarn holding unit fixing.
In a preferred embodiment, entrance slit is suitable for maintenance is introduced into weft yarn holding unit weft yarn via entrance slit.Therefore, when guiding device moves away from beat-up line and weft yarn is not yet retrained by warp thread, entrance slit prevents the weft yarn being introduced into weft yarn holding unit from being retracted by guiding device and pulling out weft yarn holding unit.Particularly, in high-speed weaving machine, this maintenance is favourable.
In one embodiment, the width of entrance slit is defined, to allow the maintenance function of entrance slit.In one embodiment, entrance slit keeps fringe enclosing by least one, preferably by two maintenance fringe enclosings opposite one another.Keep edge to avoid or at least limit the weft yarn be introduced into retracting from weft yarn holding unit or exiting.In one embodiment, edge is kept to be set to the form of hangnail or hook.In other embodiments, edge is kept to be formed as undercut area.
In a preferred embodiment, guiding device comprises and arranges jagged hook-type guide element, and recess has the sidewall that inwardly converges for reception weft yarn.Recess is formed as such as wedge shape and has one or two sidewall tilted.When guiding device moves, by such as static weft yarn stretching device, the weft yarn be captured is pulled back in recess.The sidewall of inside convergence allows the entrance area of recess to be selected as enough high, so that guiding device and weft yarn interfere and/or allow the weft yarn be captured reliably to introduce in recess when avoiding inserting before weft yarn stretching device captures weft yarn.In the bottom of recess, weft yarn is guided when moving towards weft yarn holding unit, has in the entrance slit of finite width to be introduced by weft yarn.
When weaving with same loom, the position of beat-up line can change, and such as, this is owing to using different warp thread and/or weft yarn, due to different textile designs and/or weaving speed and/or other impact owing to arranging loom.Thus, when beat up weft yarn time, the distance between the last rollback point of slay and beat-up line can change.Be not fixed at guiding device in the situation on slay, the mobile route of guiding device can be regulated.But according to the present invention, guiding device is disposed on slay, to avoid needing extra travel mechanism.In order to compensate the change in location of beat-up line and guarantee that the weft yarn be captured is introduced in weft yarn holding unit with the introducing degree of depth limited, in one embodiment, weft yarn holding unit is arranged on loom by adjustable ground, and the position of weft yarn holding unit and beat-up line match.
In another embodiment, guiding device comprises the adjustable stopping element of the degree of depth for regulating recess.By utilizing adjustable stopping element, the degree of depth of the recess of adjustable guide element, can change the introducing degree of depth being introduced into the weft yarn in weft yarn holding unit via entrance slit thus.Adjustable stopping element allows to make the degree of depth of recess mate the beat-up line position selected under certain weaving condition, to guarantee to introduce via the substantially invariable weft yarn of entrance slit or the constant weft yarn introducing degree of depth.In this way, can change the position of weft yarn holding unit, this position also affects the weft yarn beaten up and how to be provided to cutter sweep and device to be cut cut-out.In one embodiment, adjustable stopping element can be formed as little plate, and it is disposed on guiding device with the degree of depth making adjustable stopping element can reduce recess.In other words, adjustable stopping element is arranged to the bottom near recess.Preferably, stopping element is removably arranged on guiding device, thus allows when stopping element weares and teares to change stopping element.Because stopping element is the most serious elements of the wearing and tearing of guiding device, the entire life of guiding device therefore can be extended.
In a preferred embodiment, weft yarn holding unit comprises the suction nozzle with suction opening, at suction opening place inlet porting slit.The suction nozzle of weft yarn holding unit is also referred to as fixing nozzle.Fixing nozzle is provided with suction opening, and suction opening has aperture on the rear side in the face of reed.In a preferred embodiment, suction opening is the form of suction channel or suction pipe fitting.Via suction nozzle, continuous print suction force or swabbing action can be applied, so as after the weft yarn be introduced into be released from weft yarn stretching device these weft yarns of fixing.In a preferred embodiment, fixing nozzle has discarded object conduit, and described discarded object conduit is arranged to by removing described weft end by being aspirated through described discarded object conduit by the weft end that yarn cutting device cuts away.In the present embodiment, fixing nozzle has two functions, and it is for keeping the weft yarn tensioning that is introduced into and for removing the weft end be cut off.Suction opening is provided with entrance slit, is inserted by the weft yarn be captured by guiding device for allowing in the mode of the longitudinal direction transverse to weft yarn.In one embodiment, entrance slit and suction opening are integrally formed or are integrally formed at least in part.In a preferred embodiment, entrance slit is relative to the planar unsymmetrical vertical and parallel with fabric edge with fabric, and wherein, entrance slit is less than the degree of depth of entrance slit in that side towards fabric edge in the degree of depth of that side deviating from fabric edge.
In another embodiment, at least at the entrance area place of entrance slit, the section of entrance slit distally reduces towards suction nozzle, to guide weft yarn towards suction nozzle.In other words, entrance slit is wider on the rear side in the face of reed, and narrows towards front side (that is, deviating from reed).Therefore, entrance slit wall can towards during weft yarn holding unit guided inside weft yarn support guiding device.But when the wall via entrance slit guides towards fixing nozzle the weft yarn be captured, weft yarn is pushed forward in weft yarn holding unit.With applied by weft yarn stretching device for weft yarn being drawn in compared with the tension force in the recess of guide element, the damage of thrust to weft yarn is larger.Accordingly, in a preferred embodiment, the recess of guide element is selected as enough narrow in its underpart or bottom, to allow accurately to locate weft yarn relative to weft yarn holding unit, wherein, the wall of entrance slit only needs seldom or not to need guiding support.
In another embodiment, at least one pilot jet is arranged in the region of the entrance slit of weft yarn holding unit, thus along the direction away from reed towards the blowing of weft yarn holding unit inside.Pilot jet is provided for weft yarn that fixing has been introduced into and the extra retain strength for preventing the weft yarn introduced to be drawn out weft yarn holding unit.Therefore, weft yarn to be introduced in weft yarn holding unit and the weft yarn that is introduced into of fixing by pilot jet support.
Weft yarn stretching device on loom, is close to reed and guide element by arranged stationary in the expanded range inserting path.Preferably, weft yarn stretching device comprises suction nozzle, particularly ring jet formula suction nozzle, and when reed is in its position the most rearward away from beat-up line, the opening of suction nozzle points to the guide groove of reed.Preferably, the ring jet formula suction nozzle that diameter is enough large is selected as draw jet, to allow to catch well and stretching weft threads, to allow a large amount of weft yarn easily through described nozzle when needs remove the weft yarn be inserted into mistakenly.In one embodiment, use the ring jet formula suction nozzle disclosed in WO2011/000561, the content of this international application is incorporated herein by reference.
In other embodiments, static auxiliary suction nozzle is set to for removing the weft yarn be inserted into mistakenly.Static auxiliary suction nozzle comprises large opening and only operates when needs remove the weft yarn be inserted into mistakenly.
According to preferred embodiment, weft yarn stretching device is connected to control unit, wherein, weft yarn stretching device is controlled by control unit, thus weft yarn stretching device is activated to catch the weft yarn that is inserted into and to be deactivated when the weft yarn be captured is beaten or after being beaten when weft yarn is inserted into shed open.Such as, when weft yarn stretching device is suction nozzle, in one embodiment, weft yarn stretching device is connected to compressed air cylinder via valve, wherein, this valve is controlled, weft yarn stretching device is activated to catch the weft yarn that is inserted into and to be deactivated when the weft yarn be captured is beaten or after being beaten when weft yarn is inserted into shed open.
In one embodiment, the end of the weft yarn be inserted into is caught by weft yarn stretching device and by weft yarn stretching device fixing, until weft yarn is sent to weft yarn holding unit and by weft yarn holding unit fixing.
In an alternative embodiment, guiding device is provided with yarn folder, the yarn folder of particularly active.In one embodiment, at least one jaw of yarn folder or two jaws are arranged to form hook-type guide element.In this case, weft yarn is inserted into, and is stretched by weft yarn stretching device, is held by yarn is clamping afterwards.
When providing yarn to press from both sides, carry out following layout, that is, moving forward period and/or beating up period, therefore the weft yarn (end of the weft yarn be especially inserted into) be inserted into still by weft yarn stretching device fixing, and is pulled in the yarn folder between two clamping elements.After yarn folder is with the clamping of enough large power and fixing weft yarn, weft yarn stretching device of can stopping using.Yarn double-layered quilt is arranged as and directs into by the end of weft yarn clamped in weft yarn holding unit for the entrance slit via weft yarn holding unit.
In one embodiment, yarn sandwiched is equipped with adjustable stopping element, and it limits the degree of depth of the opening limited by two clamping elements.
Preferably, the folder of yarn is initiatively provided.Within the context of the present application, the power by applying to limit opens or closed yarn folder (such as, hydraulically, pneumatically or motor-driven yarn folder) is referred to as initiatively yarn folder.Initiatively yarn folder allows yarn folder to operate independently.In one embodiment, the yarn folder described by WO 2011/000561 is used.
This object solves with the loom of the device of stretching weft threads for catching by comprising further.
This object is solved by method according to claim 14 further, more specifically, by for catch and the method for the weft yarn be inserted in the shed open of loom that stretches solves, the method utilizes a device, this device has weft yarn stretching device, by arranged stationary on loom and the weft yarn holding unit and being arranged to being arranged in the region of beat-up line to move together with slay and be positioned at reed in a distance place and away from beat-up line can the guiding device of movement, wherein, described method comprises: caught by weft yarn stretching device and the leading section of the weft yarn in the expanded range in the insertion path being in weft yarn that stretches, guided the weft yarn be captured towards weft yarn holding unit by guiding device, the weft yarn be captured with limit is transversely in the displacement in the direction of the moving direction of guiding device, and via entrance slit, the weft yarn be captured is introduced weft yarn holding unit.
According to preferred embodiment, weft yarn holding unit continues to be activated, so that adapter the weft yarn that is inserted into of fixing, and weft yarn stretching device is activated when weft yarn is inserted into shed open to catch the weft yarn that is inserted into and to be deactivated when the weft yarn be captured is beaten or after being beaten.In one embodiment, weft yarn holding unit and/or weft yarn stretching device comprise suction nozzle, wherein, in initiate mode, provide suction by such as applying negative pressure.
Accompanying drawing explanation
Other features and advantages of the present invention will be presented from the following description of illustrated embodiment in the accompanying drawings.
Fig. 1 is the schematic plan view of a part during inserting weft of the loom of the device had according to the first embodiment of the present invention;
Fig. 2 is the stereogram of a part for the loom shown in Fig. 1;
Fig. 3 is the stereogram with a part for the loom of device as shown in Figure 1 watched from the rear side of reed;
Fig. 4 is the schematic diagram with the weft yarn holding unit of the loom of device and the details of guiding device illustrated as shown in Figure 1;
Fig. 5 moves the schematic plan view of the loom shown in period Fig. 1 at slay towards beat-up line;
Fig. 6 is at the schematic plan view of the loom shown in period Fig. 1 that beats up;
Fig. 7 is the schematic plan view moving the loom shown in period Fig. 1 at slay away from beat-up line backward;
Fig. 8 is the schematic plan view of the loom shown in access node period Fig. 1;
Fig. 9 is the stereogram being similar to a part for the loom of Fig. 2 of the device had according to a second embodiment of the present invention;
Figure 10 is the schematic side elevation of the details of the device shown in Fig. 9;
Figure 11 is the schematic side elevation of the variant embodiment of the weft yarn holding unit used in the device shown in Fig. 1 or 9; And
Figure 12 is the schematic plan view of the modification shown in Figure 11.
Detailed description of the invention
Fig. 1 is the schematic plan view of a part during inserting weft 2 of the loom of the device 1 had according to the first embodiment of the present invention.Fig. 2 and 3 illustrates the stereogram of a part for the loom being similar to Fig. 1.
Weft yarn 2 is inserted through and optionally raises and reduce warp thread 3 and in the shed open 30 formed between the plane of warp thread 3.During inserting, weft yarn 2 is shown in Fig. 1 by passing on nozzle 4() supported in a known way and be guided in the guide groove 509 of reed 5, the insertion path 510 of be inserted into weft yarn determined by this guide groove 509.In the embodiment depicted, weft detector 6 is disposed in the end and close reed 5 of inserting path, to detect the arrival of weft yarn 2.
By weft yarn stretching device 7 with the leading section 2f of the weft yarn 2 that predetermined tension catches and stretching is inserted into.As schematically shown, weft yarn stretching device 7 such as by cantilever or beam 700 by arranged stationary on loom, and to be on the expanded range in the insertion path of the determined weft yarn 2 of guide groove 509.
Reed 5 is attached to slay 500(and sees Fig. 3) and move towards the beat-up line 800 of fabric 8, to carry out beating motion.As shown in Figure 1 schematically, caught by weft yarn stretching device 7 and to move towards beat-up line 800 together with reed 5 with the weft yarn 2 stretched and to be beaten into fabric 8.
According to the application, weft yarn holding unit 9 is in the region of beat-up line 800, for the leading section of the multiple weft yarn 2d beaten up of fixing by arranged stationary on loom.As mentioned above, weft yarn stretching device 7 also by arranged stationary on loom, with beat-up line 800 in a distance and be positioned on the expanded range in insertion path of weft yarn 2.Removable guiding device 10 is arranged for guides towards weft yarn holding unit 9 weft yarn 2 be captured.As shown in Figure 1, guiding device 10 is positioned at and reed 5 place and away from beat-up line 800 in a distance, to avoid guiding device 10 and weft yarn interfere when inserting weft.
When the weft yarn be captured moves towards weft yarn holding unit 9, the weft yarn stretching device 7 of arranged stationary transversely applies pulling action in the direction of the moving direction B of guiding device 10 on the weft yarn be captured (not shown in Fig. 2 and 3).As shown in Figures 2 and 3, when guiding towards weft yarn holding unit 9 weft yarn be captured, guiding device 10 is suitable for limiting the weft yarn that is captured transversely in the displacement in the direction of the moving direction of guiding device 10.
Weft yarn holding unit 9 is provided with entrance slit 900(between the fabric edge 801 and the mobile route 110 of guiding device 10 of fabric 8 as shown in Figures 2 and 3).Entrance slit 900 and beat-up line 800 extend abreast and are suitable for receiving weft yarn in the mode of the longitudinal direction transverse to weft yarn.Guiding device 10 guides the weft yarn that is captured to make it be introduced in weft yarn holding unit 9 via entrance slit 900 and to be sent to weft yarn holding unit 9, maintains the enough tension force of weft yarn, to avoid weft yarn to be pulled fabric 8 or shed open simultaneously.
Cutter sweep 11(is shown in Fig. 1 and 3) be arranged between the fabric edge 801 of fabric 8 and weft yarn holding unit 9, for cutting off the end of described weft yarn after being retrained by warp thread 3 at weft yarn.Cutter sweep 11 is arranged near fabric edge 801, to minimize the tip lengths of the restrained weft yarn projecting beyond fabric 8.Fig. 1 is seen via the conduit 901(set by weft yarn holding unit 9) remove the end be cut off.
In the described embodiment, auxiliary suction nozzle 12 is arranged for the weft yarn removing and be inserted into mistakenly.Weft detector 120(is shown in Fig. 1) be disposed near auxiliary suction nozzle 12, namely just at auxiliary suction nozzle 12 front, inside or rear, for removing the weft yarn be inserted into mistakenly.The weft yarn be inserted into mistakenly is removed via the conduit 121 set by auxiliary suction nozzle 12.
In the described embodiment, weft yarn stretching device 7 and weft yarn holding unit 9 comprise ring jet formula suction nozzle separately.Within the context of the present application, ring jet formula suction nozzle is defined as aspirator, wherein, obtains suction action by being blown into compressed air in aspirator.For this purpose, in the described embodiment, weft yarn stretching device 7 and weft yarn holding unit 9 are shown in Fig. 1 via the supply line 130(with valve 131 and pressure regulator 132 respectively) be connected to compressed air cylinder 13.According to an embodiment, the valve 131 between weft yarn stretching device 7 and compressed air cylinder 13 being inserted by weft yarn in shed open to be activated when catching the weft yarn be inserted into, and is deactivated when the weft yarn 2a be captured is beaten or after being beaten.In other embodiments, at least eliminate the valve 131 between weft yarn holding unit 9 and compressed air cylinder 13, wherein, apply continuous sucking action by weft yarn holding unit 9.
The suction nozzle 902(of weft yarn holding unit 9 more specifically, ring jet formula suction nozzle) be provided with in suction cylinder or the suction opening 903 of suction tube form.Suction opening 903 or suction tube have the far-end of the cardinal principle V-arrangement opened wide towards reed 5, and described far-end has the planar tilt relative to fabric 8 so that two the entrance area 904(forming entrance slit 900 are shown in Fig. 3).Entrance slit 900 is substantially vertical with the longitudinal direction of tubulose suction opening 903 or vertically extend, to be introduced in weft yarn holding unit 9 in the mode of the longitudinal direction transverse to weft yarn by weft yarn.In a preferred embodiment, apply continuous print suction force or suction action by suction nozzle 902, to come the end of weft yarn that fixing is introduced into and affined weft yarn 2d with the tension force limited after discharging these weft yarns from weft yarn stretching device 7.
In addition, in the described embodiment, the entrance slit 900(that pilot jet 14 is arranged on weft yarn holding unit 9 is shown in Fig. 2 and 3) in region, thus it is inner and blow towards suction nozzle 902, to support weft yarn 2 to introduce in weft yarn holding unit 9 towards weft yarn holding unit 9 along the direction away from reed 5.Pilot jet 14 is connected to compressed air cylinder 13 via the supply line 130 with valve 131 and pressure regulator 132.In a preferred embodiment, the suction action of pilot jet 14 is only applied when the weft yarn that will be captured is introduced in entrance slit 900, to reduce air consumption.
At the entrance area of entrance slit 900, the section of entrance slit 900 distally reduces towards the suction nozzle 902 of weft yarn holding unit 9, thus allows the weft yarn 2d that is captured along the entrance area 904 of entrance slit 900 towards the guided inside of weft yarn holding unit 9.Entrance slit 904 is further adapted for the weft yarn 2d keeping being introduced into.For this reason, in the embodiment shown in fig. 4, entrance slit 900 is defined by two mutually opposing maintenance edges 905.Keep edge 905 to tilt a little towards the inside of weft yarn holding unit 9, thus allow weft yarn to introduce in weft yarn holding unit 9 uninterruptedly, prevent the weft yarn 2b be introduced into from retracting simultaneously.In the described embodiment, keep edge 905 to be formed on panel component 906, panel component 906 is attached to suction opening 903 in the region not on that side of fabric edge 908 of entrance slit 900.
Fig. 4 is the schematic diagram of the details that weft yarn holding unit 9 is shown.More specifically, Fig. 4 illustrates to be provided with and keeps the panel component 906 of weft yarn holding unit 9 at edge 905 and the guiding device 10 of the device 1 shown in Fig. 1 to 3.In addition, figure 4 illustrates the weft yarn 2a be captured caused by guiding device 10 and the weft yarn 2b be introduced into be introduced in weft yarn holding unit 9.As explained above, in the embodiment shown in fig. 3, pilot jet 14 is arranged in the region of entrance slit 900 of weft yarn holding unit 9, as shown in the arrow 140 in Fig. 4, pilot jet 14 is dried towards the inside of weft yarn holding unit 9.
In embodiment shown in Fig. 1 to 4, guiding device 10 comprises the hook-type guide element 100 with recess 101, and recess 101 has the sidewall 102 of inwardly convergence for receiving the weft yarn 2a be captured.Guiding device 10 comprises further for regulating the adjustable stopping element 103(of the degree of depth of recess 101 to see Fig. 3 equally).Adjustable stopping element 103 can as the shown pivotable of arrow 141 of Fig. 4.Bolt 104 is arranged for the position regulating adjustable stopping element 103.As shown in Figure 3, bolt 104 is disposed in such position, and after device 1 is installed on loom, described position is easy to be led to.
Fig. 5 to 8 schematically shows with the part of loom similar shown in Fig. 1 with for catching and the device 1 of the weft yarn being inserted into shed open that stretches.For same or similar element, use identical Reference numeral.As shown in Figure 1, the leading section of the weft yarn 2 of shed open is inserted into by weft yarn stretching device 7 seizure and stretching in the expanded range that weft yarn inserts path.The weft yarn 2 inserting shed open is captured to avoid it to be pulled in fabric 8, and is referred to as the yarn 2a be captured.As shown in Figure 5, guided the weft yarn 2a be captured towards weft yarn holding unit 9 by guiding device 10.In a preferred embodiment, the slay 500(that guiding device 10 is disposed in loom is shown in Fig. 3) upper and advance towards beat-up line 800 together with reed 5.Reed 5 and guiding device 10 are schematically shown towards the moving direction of beat-up line 800 by arrow B.Weft yarn holding unit 9 is disposed between the mobile route 110 of fabric edge 801 and guiding device 10.
As shown in Figure 6, the weft yarn 2a be captured was introduced in weft yarn holding unit 9 in period of beating up.In the described embodiment, when being introduced in weft yarn holding unit 9, the weft yarn 2a be captured still by weft yarn stretching device 7 by fixing and stretching.As with reference to Fig. 9 with hereafter explain in more detail, the alternative apparatus of the fixing weft yarn when introducing in weft yarn holding unit 9 can be adopted.The weft yarn be introduced in weft yarn holding unit 9 is referred to as the weft yarn 2b be introduced into.In a preferred embodiment, after weft yarn is introduced in weft yarn holding unit 9, stop the suction action of the weft yarn 2a utilizing weft yarn stretching device 7 to stretch to be captured.Meanwhile, weft yarn 2b is inhaled into weft yarn holding unit 9 and leaves weft yarn stretching device 7.
As shown in Figure 7, during reed and guiding device 10 are mobile backward away from beat-up line 800, the weft yarn 2b of introducing to be retained in weft yarn holding unit 9 and to be stretched by weft yarn holding unit 9.Preferably, equally as shown in Figure 7, when fabric 8 advances, the weft yarn 2d that is tied retrained by warp thread 3 is cut by cutter sweep 11.The end of cutting away is removed through conduit 901 as shown in Figure 1.
As shown in Figure 8, the weft yarn 2b(be introduced into be inhaled in weft yarn holding unit 9 is shown in Figure 7) free end by weft yarn holding unit 9 fixing and stretching, until these weft yarns are retrained by warp thread 3.
Fig. 9 and 10 schematically shows for catching and second embodiment of device 1 of the weft yarn be inserted in the shed open of loom that stretches, and wherein, Fig. 9 illustrates the view similar with the view of the device shown in Fig. 2, and Figure 10 illustrates in greater detail guiding device 10.For same or similar element, use identical Reference numeral, and the detailed description to these elements is not provided.According in the embodiment of Fig. 9 and 10, guiding device 10 is provided with initiatively yarn folder 105.Guiding device 10 is disposed on slay, to move together with reed 5.Guiding device 10 is positioned at and reed 5 place and away from beat-up line 800 in a distance, to avoid guiding device 10 and weft yarn interfere when inserting weft.
Figure 10 illustrates in greater detail the yarn folder 105 of Fig. 9.Yarn folder 105 is that initiatively yarn presss from both sides, and it is driven by pneumatic actuating device 15.Yarn folder 105 comprise fixed and arranged maxillary plate 16 and by the acia 17 installed movably of pneumatic actuation.In the described embodiment, the jaw 16 of fixed and arranged comprises the clamping element 160 of elasticity installation, and the plate 161 that it is supported by elastic layer 162 is formed.Clamping element 160 has such as substantially smooth clamping surface.Elastic layer 162 is such as formed by the resetter applying restoring force, such as, synthesize the elastic layer 162 of layer or rubber layer shape.This elastic layer 162 preferably also has damping characteristic.This allows to realize suitable holding function.Plate 161 forms wearing layer and is such as made up of metallic plate.The jaw 17 arranged movably comprises the clamping components 170 that can cooperate with clamping element 160.Clamping components 170 has the clamping surface of such as substantially flat.
The jaw 17 arranged movably is integrally formed with the actuated lever arm 18 that can be driven along both direction by pneumatic actuating device 15.Pneumatic actuating device 15 comprises cylinder 151 and 152.Actuated lever arm 18 and the jaw 17 arranged movably are the parts being mounted to the unit that can rotate around axis 19.Cylinder 151,152 is connected to compressed air source (not shown) via stop valve (not shown) respectively.Compressed air source can be identical with the compressed air cylinder 13 shown in Fig. 1.In a preferred embodiment, control unit is arranged for control stop valve.In a preferred embodiment, the control unit for controlling stop valve can also control other parts various of loom, such as, valve 131 shown in Fig. 1.According to described embodiment, yarn folder 105 comprises the stop and arm 20 that can cooperate with retainer 21 further.Retainer 21 is by setting element 22(such as dog screw) be installed in adjustable position.In addition, in the embodiment shown, retainer 21 comprises and can cooperate with stop and arm 20 and the stopping element 23 such as formed by the material with damping characteristic.
Operate as follows: when closing yarn with certain force and pressing from both sides 105, the clamping components of clamping components 170 and clamping element 160 contacts with each other and stop and arm 20 impacts on retainer 21, thus chucking power is restricted and removable jaw 17 can not act on the plate 161 of the jaw 16 of fixed and arranged with all strength.
According to modification, stopping element 23 has damping characteristic, and this allows the elastic deformation during cooperating with stop and arm 20.When stop and arm 20 impacts on retainer 21, impact force weakens.Therefore, large power can be utilized to control pneumatic actuating device 15, thus yarn folder 105 can be closed fast enough and just complete closed after just there is enough large damping force, the damping characteristic of stopping element 23 is conducive to limiting the impact of impact on retainer 21 simultaneously.
The yarn folder 105 of pneumatic actuation is suitable for allowing to be controlled so as to open in any position of slay 500 or close.In a preferred embodiment, yarn folder 105 is controlled as the weft yarn clamping after the beating motion of reed 5 and be inserted into.The weft yarn be inserted into is caught by weft yarn stretching device 7 and stretches, and is sent to yarn folder 105 when yarn folder 105 is through weft yarn stretching device 7.Be introduced into subsequently in weft yarn holding unit 9 by the weft yarn 2a that yarn folder 105 is captured.When carrying out this to weft yarn holding unit 9 and transmitting, operate yarn folder 105 is to discharge the weft yarn 2a be captured.
Preferably, the guiding device 10 comprising yarn folder 105 is also provided with adjustable stopping element 103, and it limits the degree of depth of the opening formed by two clamping elements 160,170.In the not driven situation of drive unit 15 of yarn folder 105, the yarn folder 15 of Figure 10 can thus serve as the hook-type guide element 100 of Fig. 4.In the driven situation of drive unit 15 of yarn folder 105, the hook-type guide element 100 that the yarn folder 15 of Figure 10 also can be used as Fig. 4, its towards weft yarn holding unit 9 guide the weft yarn 2a that is captured and thus such as relative resilient weft yarn can be pulled back in fabric to prevent weft yarn in conjunction with weft yarn stretching device 7.
Figure 11 and 12 illustrates the variant embodiment of the weft yarn holding unit 9 of the device 1 shown in Fig. 1 to be used to or 9.Weft yarn holding unit 9 shown in Figure 11 and 12 comprises the suction opening 903 formed by pipe fitting.The aperture of suction opening 903 is in the face of reed 5.At the far-end inlet porting slit 900 of suction opening 903.
Entrance slit 900 is formed by two grooves 907,908, and described groove is arranged in the pipe fitting forming suction opening 903.Two grooves 907,908 are arranged in two parallel planes.Be arranged to when weft yarn holding unit 9 is in use and see Fig. 1 or 9 closer to fabric edge 801() groove 908 long enough, so as to allow fixing and the weft yarn that is introduced into of stretching until these weft yarns are retrained by warp thread 3, and the weft yarn that is introduced into can not be made relative to the bottom bend of groove 908, that is, weft yarn is allowed between weft yarn holding unit 9 and fabric edge 801 along roughly straight line extension.The groove 907 at the opposite side place of suction opening 903 is provided with two maintenance edges 905 opposite one another.Keep edge 905 to tilt a little towards the inside of weft yarn holding unit 9, not disturb the introducing of weft yarn (not shown), prevent the weft yarn be introduced into from retracting or retreating simultaneously.Edge 905 is kept preferably to be arranged on entrance area 904 place of entrance slit 900, as shown in FIG. 11 and 12.Therefore, groove 908 is longer than groove 907.In other embodiments, groove 907 extends beyond the maintenance edge 905 of such as some the hangnail forms that are set to and has identical length with groove 908.
Pilot jet 14 is arranged in the region of entrance slit 900 of weft yarn holding unit 9, and pilot jet 14 is dried towards the inside of weft yarn holding unit 9.
Obviously be not limited to be described by way of example according to device of the present invention, the loom with this device and method and illustrated embodiment in the accompanying drawings.According to variant embodiment, shape and size, device, loom and method can be specialized in the claims similarly.The combination dropping on the illustrated embodiment in right is also feasible.
Claims (15)
1. one kind for catching and the device of the weft yarn (2) be inserted in the shed open of loom that stretches, comprise weft yarn stretching device (7), weft yarn holding unit (9), and can the guiding device (10) of movement, described weft yarn stretching device is in the expanded range in the insertion path of weft yarn (2) by arranged stationary on loom, also to stretch the weft yarn (2a) be captured for catching the leading section of weft yarn (2) be inserted into, described weft yarn holding unit is in the region of beat-up line (800) by arranged stationary on loom, for the leading section of at least one weft yarn through beating up of fixing, described guiding device is used for the weft yarn (2a) be captured towards described weft yarn holding unit (9) guiding, wherein, the weft yarn (2a) that described guiding device (10) is suitable for being captured in weft yarn (2a) limit be captured towards described weft yarn holding unit (9) guiding is transversely in the displacement in the direction of the moving direction of described guiding device (10), it is characterized in that, it is upper to move together with described slay (500) that described guiding device (10) is disposed in slay (500), wherein, described guiding device (10) is positioned at and reed (5) place and away from described beat-up line (800) in a distance, to avoid described guiding device (10) and described weft yarn (2) interfere when inserting described weft yarn (2).
2. according to claim 1 for catching the device with stretching weft threads, it is characterized in that, described weft yarn holding unit (9) is provided with the entrance slit (900) between the fabric edge (801) and the mobile route of described guiding device (10) of described fabric (8), and described entrance slit (900) is suitable for receiving described weft yarn (2) in the mode of the longitudinal direction transverse to weft yarn (2).
3. according to claim 2 for catching the device with stretching weft threads, it is characterized in that, described entrance slit (900) is suitable for the weft yarn keeping being introduced into described weft yarn holding unit (9) via described entrance slit (900), such as, described entrance slit (900) is kept edge (905) to define by least one, is preferably defined by two maintenance edges (905) opposite one another.
4. according to claim 1,2 or 3 for catching and the device of stretching weft threads, it is characterized in that, described guiding device (10) comprises the hook-type guide element (100) being provided with recess (101), described recess (101) has the sidewall (102) inwardly converged, for the described weft yarn of reception (2).
5. according to claim 4ly it is characterized in that for catching the device with stretching weft threads, described guiding device (10) comprises the adjustable stopping element (103) of the degree of depth for regulating described recess (101).
6. according to any one of claim 1 to 5 for catching the device with stretching weft threads, it is characterized in that, described weft yarn holding unit (9) comprises the suction nozzle (902) with suction opening (903), arranges described entrance slit (900) at described suction opening (903) place.
7. according to claim 6 for catching the device with stretching weft threads, it is characterized in that, at least at the entrance area place of described entrance slit (900), the section of described entrance slit (900) distally reduces, to guide described weft yarn towards the suction nozzle (902) of described weft yarn holding unit (9) towards described suction nozzle (902).
8. according to any one of claim 2 to 7 for catching the device with stretching weft threads, it is characterized in that, at least one pilot jet (14) is arranged in the region of the entrance slit (900) of described weft yarn holding unit (9), thus along the direction away from described reed (5) towards described weft yarn holding unit (9) inside blowing.
9. according to any one of claim 1 to 8 for catching the device with stretching weft threads, it is characterized in that, described weft yarn stretching device (7) comprises suction nozzle, particularly ring jet formula suction nozzle, when described reed (5) be in away from described beat-up line (800) its most rearward position time, the opening of described suction nozzle points to the guide groove (509) of described reed (5).
10. according to any one of claim 1 to 9ly it is characterized in that for catching the device with stretching weft threads, auxiliary suction nozzle (12) is arranged for the weft yarn removing and be inserted into mistakenly.
11. is according to any one of claim 1 to 10 for catching the device with stretching weft threads, it is characterized in that, described weft yarn stretching device (7) is connected to control unit, wherein, described weft yarn stretching device (7) is controlled by described control unit, thus described weft yarn stretching device (7) is activated to catch the weft yarn that is inserted into and to be deactivated when the weft yarn be captured (2a) is beaten or after being beaten when weft yarn is inserted into described shed open.
12. according to any one of claim 1 to 11 for catching the device with stretching weft threads, it is characterized in that, described guiding device (10) is provided with yarn folder, particularly initiatively yarn folder (105).
13. 1 kinds of looms, is characterized in that, loom comprise according to any one of claim 1 to 12 for catching and the device of stretching weft threads (1).
14. 1 kinds for catching and the method for the weft yarn (2) be inserted in the shed open of loom that stretches, described method utilizes the device (1) according to any one of claim 1 to 12, described device (1) has weft yarn stretching device (7), on loom, the weft yarn holding unit (9) in the region of beat-up line (800) is arranged in by arranged stationary, and be arranged to move together with slay (500) and be positioned at reed (5) in a distance place and away from beat-up line (800) can the guiding device (10) of movement, wherein, described method comprises: the leading section being in the described weft yarn (2) in the expanded range in the insertion path of described weft yarn (2) by described weft yarn stretching device (7) seizure and stretching, by the weft yarn (2a) that described guiding device (10) is captured towards described weft yarn holding unit (9) guiding, the weft yarn be captured with limit (2a) is transversely in the displacement in the direction of the moving direction of described guiding device (10), and via entrance slit (900), the described weft yarn (2a) be captured is introduced described weft yarn holding unit (9).
15. is according to claim 14 for catching the method with stretching weft threads, it is characterized in that, described weft yarn holding unit (9) continues to be activated, so that adapter and the weft yarn that is inserted into of fixing, and described weft yarn stretching device (7) is activated when weft yarn is inserted into shed open to catch the weft yarn that is inserted into and to be deactivated when the weft yarn be captured (2a) is beaten or after being beaten.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BEBE2012/0078 | 2012-02-08 | ||
| BE2012/0078 | 2012-02-08 | ||
| BE2012/0078A BE1020533A3 (en) | 2012-02-08 | 2012-02-08 | DEVICE AND METHOD FOR CATCHING AND PULLING AN IMPOSITION WIRE |
| PCT/EP2013/052280 WO2013117564A2 (en) | 2012-02-08 | 2013-02-06 | Device for catching and stretching a weft thread, weaving machine and method for catching and stretching a weft thread |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104220659A true CN104220659A (en) | 2014-12-17 |
| CN104220659B CN104220659B (en) | 2016-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380008755.XA Active CN104220659B (en) | 2012-02-08 | 2013-02-06 | Catch and the device of stretching weft threads, loom, seizure and stretching weft threads method |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2812472B1 (en) |
| CN (1) | CN104220659B (en) |
| BE (1) | BE1020533A3 (en) |
| WO (1) | WO2013117564A2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105483914A (en) * | 2016-01-12 | 2016-04-13 | 青岛天一集团红旗纺织机械有限公司 | Weft yarn drafting device of air-jet loom |
| CN105671750A (en) * | 2016-04-15 | 2016-06-15 | 苏州市丹纺纺织研发有限公司 | Spiral spring type weft catching device |
| CN109642362A (en) * | 2016-09-02 | 2019-04-16 | 必佳乐公司 | Device and method for capturing and stretching weft |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6119715B2 (en) * | 2014-10-27 | 2017-04-26 | 株式会社豊田自動織機 | Weft tension applying device for air jet loom |
| CN110886043A (en) * | 2019-12-26 | 2020-03-17 | 鲁丰织染有限公司 | Stretching auxiliary spraying system for reducing length of waste selvage yarn of air jet loom |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105483914A (en) * | 2016-01-12 | 2016-04-13 | 青岛天一集团红旗纺织机械有限公司 | Weft yarn drafting device of air-jet loom |
| CN105671750A (en) * | 2016-04-15 | 2016-06-15 | 苏州市丹纺纺织研发有限公司 | Spiral spring type weft catching device |
| CN105671750B (en) * | 2016-04-15 | 2017-12-01 | 苏州市丹纺纺织研发有限公司 | A kind of Mainspring type catches latitude device |
| CN109642362A (en) * | 2016-09-02 | 2019-04-16 | 必佳乐公司 | Device and method for capturing and stretching weft |
| CN109642362B (en) * | 2016-09-02 | 2021-08-06 | 必佳乐公司 | Device and method for catching and stretching weft threads |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2812472B1 (en) | 2016-09-28 |
| WO2013117564A2 (en) | 2013-08-15 |
| WO2013117564A3 (en) | 2014-03-27 |
| BE1020533A3 (en) | 2013-12-03 |
| CN104220659B (en) | 2016-03-16 |
| EP2812472A2 (en) | 2014-12-17 |
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