CN1341172A

CN1341172A - Method and apparatus for stretching and collecting knitted fabric produced by circular knitting machines

Info

Publication number: CN1341172A
Application number: CN00804080A
Authority: CN
Inventors: 蒂贝里奥·洛纳蒂
Original assignee: Vignoni Srl
Current assignee: Santoni SpA
Priority date: 1999-02-23
Filing date: 2000-02-18
Publication date: 2002-03-20
Anticipated expiration: 2020-02-18
Also published as: EP1155176A1; DE60019899T2; JP2002538316A; ITBS990016A1; EP1155176B1; CN1189614C; ATE294885T1; PT1155176E; KR20010101968A; KR100700225B1; WO2000050678A1; AU3190000A; ES2241582T3; DE60019899D1; IT1309184B1

Abstract

A method for stretching and collecting a knit fabric produced by circular knitting machines comprising the phase of progressively cutting a flattened tubular piece along a longitudinal generatrix, spreading the piece according to diverging lines inclined downwards until reaching inferiorly a position laterally offset relative to the vertical central axis of the knitting machine and of collecting the stretched piece. Also provided is an apparatus for stretching and collecting a knit fabric in tubular piece comprising piece-presser rollers (10) for flattening the tubular piece coming from the circular machine, a rotating blade (18) positioned downstream from said piece-presser rollers (10), at least two spreading rollers (13) positioned according to diverging lines inclined downwards, at least a roller (14) for transmitting the stretched piece positioned in a first edge area (2a) of the frame of the apparatus, and a set (22) for collecting the stretched piece positioned in a second edge area of the support frame.

Description

Be used to stretch and collect the method and apparatus of the knitted fabric of producing by circular knitter

Technical field

The present invention relates to a kind of method and apparatus that is used to stretch and collects the knitted fabric of producing by circular knitter, comprise the following steps: smooth basically one cartridge from circular knitting machine, along this cartridge that is flattened of the progressive cutting of a vertical bus, launch with these parts and by the transverse edge that cutting produces, this unfolded part is drawn into a woven, and the parts that stretch are collected rolling.

This device comprises, a scaffold, this scaffold are positioned at above-mentioned circular knitter below, and can rotate with its syringe with being integral; The device that is used for the smooth basically cartridge from circular knitting machine; Cutter sweep, this cutter sweep are positioned at above-mentioned flattening device downstream, and can vertically cut this cartridge along a bus; Be used for opening and stretching that this is cut the device of parts, and the parts that are used for being stretched are gathered into the assembly of individual layer with the form of a woven.

Background technology

As everyone knows, traditional being used for will be stretched and collect the method and apparatus of rolling or overlapped layers by the knitted fabric that circular knitter is produced, the cartridge that therefrom comes out is subjected to downward traction, and progressive smooth, reaches final consistent up to them with two stacked plane layers.

In the conventional art, under the situation of elasticity and/or smart yarn and the weak knitted structure of existence, two permanent lateral fold of formation are very difficult maybe can not be removed, and this has also produced counter productive in the final operation of fabric.

In order to overcome above-mentioned defective, very big at diameter, promptly under the situation of maximum 60 inches circular knitting machine, such technology is known, promptly open tubular fabric by two radially relative longitudinal cuts, thereby obtain the woven that two width equate, this width equals the width (see European patent no.534917, with the application be same applicant) of the cartridge of smooth mistake.

Bigger at diameter, under the situation of promptly about 30 inches circular knitting machine,, promptly open cartridge with two otch if use prior art, the width of fabric of acquisition is too small, thereby can not accept.

Therefore must open cartridge with a single longitudinal cut, so as can a width corresponding to the individual layer of fabric whole circumference in to its stretching.

For example by the prior art of learning among European patent no.456576 and the United States Patent (USP) no.5556558 that is used for this technology, use the device that a scaffold is housed respectively, this scaffold is positioned at the circular knitter below, and can rotate with its syringe one.

On this scaffold, be provided with and carry out initial and smooth substantially device to cartridge, the cutter sweep that can vertically cut, and the device that is used for this cutting part is opened and is drawn into woven along a bus of cartridge from circular knitting machine.Particularly, this opening with stretching device is made up of the vacant roller that is installed on the machine supports framework.

What same and supporting structure interrelated is one or more groups driven roller, be used for along above-mentioned smooth, cut, open with stretching device at passage propulsive element controllably, and parts that are used for being stretched are gathered into the spool of woven layer or are gathered into the assembly of overlapped layers.

At last, also be provided with the roller of screw slotting, be used for its edge that before parts are collected, stretches.There is major defect in the prior art of similarly describing in the above.

At first, because driving and collection assembly and the device that is used to open with stuetch fabrics align below the vertical centre axis of circular knitting machine syringe basically, the whole height increase of these well known devices is very remarkable, thereby force knitting machine is positioned at such height apart from ground, make designated person maintain machinery inconvenient operation and difficulty.

In order to overcome above-mentioned shortcoming, above-mentioned United States Patent (USP) be used to stretch and collect the device of fabric above around circular knitting machine one passageway platform is set, perhaps replacedly, be used for this device is inserted a hole that obtains on fabrication facility floor.Clearly, under first kind of situation, can not because must climb up the passageway, and under second kind of situation, when the parts of removing the collection rolling and maintenance unit and hole, all cause additional running cost immediately near circular knitting machine.

Be further noted that, coiling or the parts of building up into overlapped layers are carried out final location, basically be to carry out corresponding to the central area of knitting machine, therefore extracting parts out with suitable loading and haulage truck is difficulties and expensive, even automatically.

Particularly, should be noted that in European patent 456576, in some steps before entering drive roller sets, the undue level in the path of parts, this cause form that knitted fabric and parts self are unfolded and each step of stretching in drive actions systematicness defective.

Another remarkable limitation of the prior art is that vacant unwind roll drives by the motion of knitted fabric, can not participate in opening of edge energetically, and described edge can curl naturally.

Limitation on another technology and the function is, screw slotting roller controlled motion mechanism, and this makes other component movement of machine, thereby their efficient when stretched edge is very low.In the practice, these rollers are with a ratio required much lower speed rotation of speed in tensile part edge satisfactorily.

If necessary, the solution that provides a kind of rigidity to the stretching and the collection of tubular fabric according to the prior art of above-mentioned patent, for example for the cartridge of reeling in a conventional manner, promptly need not cut and open with bilayer, need carry out important and modification costliness to the structure of device, so that this variation on its adaptive functions.

Disclosure of the Invention

In this case, the technical assignment that constitutes basis of the present invention provides a kind of method and apparatus that is used to stretch and collects the knitted fabric of being produced by circular knitter, to overcome above-mentioned defective.

In the scope of this technical assignment, a free-revving engine of the present invention is to propose a kind of being used for to stretch and collect the method and apparatus of the knitted fabric of producing with the cartridge form with an individual layer, and it can be used for collecting fabric technology with double-deck form and in height remain unchanged basically during the positioning round knitting machine with respect to traditional.

Another free-revving engine of the present invention provides a kind of method and apparatus, and it can better and more critically will be drawn into an individual layer with the knitted fabric that the cartridge form is produced.

Another purpose is to propose a kind of method and apparatus, and helping is the use of automatic loading and haulage truck equally, is used to remove the fabric of collecting rolling or overlapped layers.

Another purpose of the present invention is to obtain a kind of device, and this device is easy to from width, promptly be transformed into application traction and need not cut and widen the traditional function of cartridge self with the stretch function of a cartridge of a form of single sheet.

Above-mentioned technical assignment and specific purposes are realized by the method and apparatus that is used for stretching and collect the knitted fabric of being produced at cartridge by circular knitter basically, be it is characterized in that they comprise one or more technical schemes that require below.

The present example by non-limiting demonstration, to apparatus of the present invention shown in the accompanying drawing preferably but not exclusive embodiment describe.

Accompanying drawing is described

Fig. 1 represents a side view of this device;

Fig. 2 is the perspective view that installs among Fig. 1;

Fig. 3 represents the part and the perspective schematic view of this device critical piece;

Fig. 4 represents the view similar to Fig. 3, has given prominence to the continuous operating procedure that circular fabric is subjected to.

The description of illustrated embodiment

With reference to above-mentioned accompanying drawing, device of the present invention is represented with digital 1 integral body.

It comprises that one is positioned at the scaffold 2 below the known circular knitter 3, and this circular knitter 3 is corresponding with a syringe 4, is provided for producing the knitted fabric of cartridge 5 forms.

This scaffold can be integral rotation with syringe 4 around a vertical centre axis 6, and is positioned at a fixed structure 7 inside, and 7 pairs of frameworks of this fixed structure 2 are fixed with circular knitting machine 3 self.Near framework 2 tops, be provided with the parts 5 that are used for from syringe 4 and carry out roughly smooth device 8.Known this device 8 self comprises that parts widen framework 9, these parts are widened framework 9 can be by along its radially roughly smooth and drum of gradual modification parts, and the piece-presser roller 10 of pair of parallel, this piece-presser roller 10 suitably is spaced apart from each other and limits this parts from the outside.

Be provided with cutter sweep 11 below parallel rollers 10 is tight, this cutter sweep 11 can be progressively along bus cutting cartridge 5, and is used to the device 12 opening and stretch and be cut parts, and this device 12 can be extended to it individual layer 5a.

More specifically, this is opened with stretching device 12 and comprises two rollers 13, the transverse edge 5b that this roller 13 is used for unfolded part 5 and obtains by cutting, and one be used to transmit the roller 14 of parts of being stretched.

Unwind roll 13 is initial according to downward-sloping expansion path setting, and begins to extend from upper end 13a adjacent to each other and that be positioned at the zone relative with above-mentioned cutting bus on the parts.In more detail, upper end 13a and cutter sweep 11 are relatively located, and concordant with it basically, up to lower end 13b from the first fringe region 2a of following arrival with respect to the scaffold 2 of the vertical centre axis lateral displacement of knitting machine.

Roller 14 is positioned among this fringe region 2a, is used to transmit the parts 5a that is stretched.

Unwind roll 13 is hinged on the first end 15a with scaffold 2 all-in-one-piece support body 15 by its close upper end 13a, and lower end 13b can be fastened on the same and framework 2 all-in-one-piece curved bottom elements 16 with an adjustable phase mutual edge distance.

In this way, can change the expansion of parts 5 and transverse edge 5b thereof as requested.

Unwind roll 13 can be installed on the backing roll 2 in zero load, but preferably and advantageously is provided with individual motor 13c, further helps parts are drawn into individual layer.

The direction of rotation that is applied on the roller by motor is preferably opposite with the direction of advance of parts, to strengthen the drawing effect to parts.

The place that the first end 15a of supporting member 15 extends to the outside is provided with a spinner member 17 with arcuate profile, can below parallel rollers 10 tight parts being led, helps it and slides in the key area that tension force increases on the contrary with the cutting bus.

Spinner member 17 can be taken turns or a ball constitutes by one.Replace mutually with this spinner member, a shaker arm by the band curved end of a tensioned can be provided.

The second end 15b location cutter sweep 11 corresponding to this support body 15, this cutter sweep 11 advantageously comprises a rotating blade 18, one is used to support and control the blade guide 19 and a motor 20 of this blade, but this blade guide 19 and motor 20 are positioned at the position that one on the support body 15 self regulated, thereby can change the distance of rotating blade 18 and central axis 6 according to the operation requirement.The position of spinner member 17 can be regulated equally, because it is installed on the bar 17a, this bar 17a can be by bolted to the corresponding groove that is formed on the support body 15.

In scaffold 2 and the concordant substantially central area of transfer roller 14, be combined with a pair of driven roller 21, this driven roller 21 is used for control assembly and passes above-mentioned flattening device 8, above-mentioned cutter sweep 11 and above-mentioned opening with stretching device 12 along syringe 4 path downstreams and advance.This group driven roller 21 comprises a center idler roller 21a and two horizontal opposed roller 21b.

Preferably, this group driven roller 21 is controlled by a motor 21c, is used to drive the device of other roller or is independent of the device that plays other function and be independent of.

In drive roller sets 21 downstreams, corresponding to the second fringe region 2b of scaffold 2 and with respect to central axis 6 lateral shifts, be provided with one group of roller 22, be used for parts that are drawn into individual layer are collected rolling.

Replacedly, can provide a known device, this device is suitable for described parts are gathered into lamination.Between transfer roller 14 and drive roller sets 21, be provided with one first roller 23, be used at the lateral tension parts, this first roller has two slotted sections of twining of spiral in the opposite direction, and these two slotted sections can be offset the trend that the band near the parts self of transverse edge 5b longitudinally self curls.

Near lateral tension roller 23, also be provided with a piece-presser roller 23a, be used to increase the winding angle of parts, and thereby increased the action effect of screw slotting part on the edge-of-part around the lateral tension roller.

Between drive roller sets 21 and collecting drum group 22, also be provided with one second roller 24, be used for the piece-presser roller 24a corresponding and cooperate, in horizontal 24 tensionings with one.

Piece-presser roller 23a and 24a can towards with away from corresponding lateral tension roller 23 levels and vertical adjusting, to determine the either large or small coiling of parts around lateral tension roller 23.

Lateral tension roller

23 and 24 is equipped with the motor 23b and the 24b of machine-independent other function, and its speed is greater than speed of the prior art, thereby has improved the stretching that the edge of the parts that become curling for meeting carries out.

In scaffold 2 (Fig. 1), below the top and bottom of unwind roll 13 13a and 13b, be respectively equipped with

perforate bearing

25 and 26, the end that is used for accommodating belt motor roller and transfer roller, this transfer roller can keep and advance the belt that is used to drive with the support unit core between unwind roll 13.

At last, advantageously, scaffold 2 has a pair of horizontal cross member 27, and this horizontal cross member 27 is oriented orthogonal to above-mentioned drive roller sets 21 and is provided with the additional bearing 28 (Fig. 2) of the end that is used for piece-presser roller 10.

When alternating with opening of tubular fabric cutting and width, requiring this fabric is stretched with the form of two overlapped layerss and tradition when collecting, bearing 28 makes piece-presser roller 10 self be repositioned to 90 simply and fastly to spend.

In addition, schematically show distance sensor 29 or contact oscillator, be used for too approachingly even when contacting swivel bearing framework 2, brake this device as the operator.Advantageously, sensor 29 is located corresponding to the edge of swivel bearing framework at least.

Operation to said apparatus describes on general structural meaning below.

Cartridge 5 from syringe 4 is progressive smooth by parts expansion framework 9, parallel component compressing roller 10 and blade guide 19.

Subsequently, cut along an one bus by the cartridge device to be cut 11 that is flattened of drive roller sets 21 vertical tensionings, it slides on spinner member 17 corresponding to relative bus simultaneously, and this has prevented the deflection and the formation of folding line.The parts that are cut broaden gradually and are stretched by unwind roll 13, fully arrive transfer roller 14 up to it with opening.

After this, woven continues along substantially horizontal path, from the first fringe region 2a of the scaffold 2 at transfer roller 14 places move to be used to collect rolling maybe may be lamination roller group 22 places second, opposed edges zone 2b.

In this basic horizontal path,

lateral tension roller

23 and 24 keeps knitted fabric very flat, prevents that it is corresponding to edge curl.

The invention process a kind of new method, this new method constitutes an integral part of this patent equally.

It comprises carries out an operating procedure, thereby makes from the cartridge quilt of circular knitting machine smooth basically.Subsequently, carry out progressive cutting, make the component area relative keep crooked simultaneously, thereby prevent to form folding line and skew with cutting bus along the bus that is flattened parts.

In the otch downstream, launch and stretch to parts and by the transverse edge that cutting produces.

This expansion operation is along progressive the carrying out of downward-sloping route of extending from the height of cutting zone basically, and up to arriving primary importance below, this primary importance is with respect to the vertical centre axis lateral run-out of knitting machine.Corresponding to this primary importance, finish stretching with the parts of woven formal expansion.

Downward from above-mentioned primary importance, the path substantial horizontal of parts is extended, and arrives one with respect to central axis lateral shift, the second place relative with primary importance self.In this second place, the parts that are stretched are collected rolling or overlapped layers.

At the section of the parts path basic horizontal between above-mentioned first and second positions, parts are drawn, and the whole operating procedures that are positioned at the cylinder of knitting loom downstream through diagram are controllably advanced.

In addition, in this horizontal section, the parts that are stretched advantageously are subjected to two tensioning operations at horizontal direction, and this tensioning operation can be offset the trend that marginal belt self curls.

The present invention has obtained important advantage.

At first, described apparatus and method have obtained the path of parts in cutting and the opening steps, thereby the path of the parts that obtained to be stretched, and this path has occupied whole horizontal spaces of horizontal cylinder of knitting loom below.

Therefore the vertical dimension of device is restricted, thereby in fact the height of stacked knitting machine and accessibility do not change with respect to the conventional art that does not have the width opening.

Enter the syringe working face easily and determine, promptly drive, collection and lateral tension roller be set in place on the single plane of machine bottom by the following fact.This high-end space of having reserved that is aligned in machine of roller, and allow unwind roll to tilt, thus when he or she need be near the operating mechanism of circular knitting machine, help finishing of operator's task.

In order to help operator circle to go into, also increased the diameter of the ring 30 of support thread feeder (thread feeder) 31 equally, made it be substantially equal to the size of base with respect to conventional machines.In this way, feeder is away from machine axis and more near the operator.

Above-mentioned machine construction, permission will be used for rolling or collect this roller group located lateral of fabric that is stretched with the lamination form, thereby help the location of truck, and this location also can be automatically, is used to extract out and transport the parts of coiling.

In addition, the length that the knitted fabric that is obtained by the original alignment of unwind roll is widened section and had an otch of rotating blade can obtain the steady and accurate opening of a knit fabrics self, and remains on the step of formation knitted fabric and all tensionings regularly of path towards the roller group that is used for collecting rolling subsequently.

At last, should emphasize that device according to the present invention has high operating flexibility, because can change easily and apace-if desired-to traditional tensioning and collection rolling, and need not cut and widen parts.

Obviously, under the prerequisite that does not break away from as the inventive concept scope of its feature, can carry out various modifications and variations to said method and device.

Claims

1. a method that is used to stretch and collects the knitted fabric of being produced by circular knitter comprises the following steps:

Basically smooth one cartridge from this circular knitting machine,

Along this cartridge that is flattened of the progressive cutting of a vertical bus,

The transverse edge that launches these parts and produce by cutting,

The parts of this expansion are drawn into a woven, and collect the parts that are stretched;

It is characterized in that, the expansion of above-mentioned parts and transverse edge thereof be along basically from the height of cutting zone extend downward-sloping, and the route of expansion carry out gradually, up to arriving first below, this first is with respect to the vertical centre axis lateral shift of knitting machine, thereby finished the stretching of above-mentioned parts in the above-mentioned first lateral shift position, and the collection of the parts that are stretched is finished in a second place, this second place is with respect to above-mentioned central axis lateral shift, and the opposite side that is positioned at described primary importance is also concordant with this primary importance basically.

2. the method for claim 1 is characterized in that, above-mentioned parts are drawn, and is used for that parts self are controllable in the course of the work advances.

3. method as claimed in claim 2 is characterized in that, above-mentionedly is used for parts can to control the traction of advancing is that carry out in zone, parts path between the said second position that the above-mentioned primary importance of finishing stretched operation and parts self are collected,

4. each described method in the claim as described above is characterized in that, before parts are collected, laterally the parts that are drawn into individual layer is being carried out a tensioning operation, the trend of curling with the marginal belt self of offsetting parts perpendicular to direction of advance.

5. each described method in the claim as described above is characterized in that along a bus cartridge that is flattened is being carried out in the above-mentioned progressive cutting process, the zone that parts are relative with above-mentioned bus keeps crooked, thereby prevents folding line and skew.

6. device that stretches and collect the knitted fabric of the cartridge form of producing by circular knitter, this circular knitter comprises: a scaffold (2), this scaffold (2) is positioned at above-mentioned circular knitter (3) below, and can rotate with its syringe (4) one; The device (8) that is used for smooth basically cartridge (5) from circular knitting machine; Cutter sweep (11), this cutter sweep (11) are positioned at above-mentioned flattening device (8) downstream, and can vertically cut this cartridge along a bus; Be used for the device (12) opening and stretch and be cut parts with the form of a woven, and an assembly (22) that is used to collect the parts that are drawn into an individual layer, it is characterized in that, above-mentionedly be used to open and the device (12) that is cut parts that stretches comprising:

At least two rollers (13) that are used for unfolded part (5) and pass through the transverse edge (5b) of cutting acquisition, above-mentioned unwind roll is according to downward-sloping expansion path setting and relative with above-mentioned cutting bus and begin to extend with the concordant substantially zone of above-mentioned cutter sweep (11) from the parts, up to the below of arrival with respect to first fringe region (2a) of the scaffold (2) of vertical centre axis (6) lateral shift of knitting machine (3)

And at least one is used for transmitting the roller (14) of the parts that are stretched that are positioned at above-mentioned first fringe region (2a), above-mentioned one second fringe region (2b) that is used for the assembly (22) of be stretched parts collection rolling or lamination is positioned at scaffold (2), this second fringe region (2b) is with respect to above-mentioned central axis lateral shift, and the opposite side that is positioned at described transfer roller (14) is also concordant with its (14) basically.

7. device as claimed in claim 6, it is characterized in that, it comprises at least one group of driven roller (21), is used to pass above-mentioned flattening device (8), above-mentioned cutter sweep (11) and above-mentioned open and stretching device (12) makes described parts controllably advance along its path.

8. device as claimed in claim 7 is characterized in that, above-mentioned driven roller (21) group is positioned to be used to transmit and is stretched between the roller (14) and above-mentioned collection assembly (22) of parts.

9. device as claimed in claim 6, it is characterized in that, it comprises that at least one is used for being positioned in the horizontal direction tensioning roller (23 of the parts that are stretched between above-mentioned transfer roller (14) and the above-mentioned collecting drum (22), 24), and by two in the opposite direction the slotted section of screw winding form, to offset the trend with self longitudinal curl of parts self near transverse edge (5b).

10. device as claimed in claim 9 is characterized in that, it comprises that also at least one is positioned near the piece-presser roller (23a) of lateral tension roller (23), is used to increase the winding angle of parts around the lateral tension roller.

11. device as claimed in claim 6, it is characterized in that, it comprises that at least one has the spinner member that is used to guide these parts (17) of curved profile, this rotary part (17) corresponds essentially to the location, upper end adjacent to each other (13a) of above-mentioned unwind roll (13), and allows parts (5) to slide in the above-mentioned zone relative with the cutting bus.

12. device as claimed in claim 11 is characterized in that, above-mentioned rotation guide element (17) is taken turns by one and is constituted.

13. device as claimed in claim 11 is characterized in that, above-mentioned rotation guide element (17) is made of a ball.

14. device as claimed in claim 6, it is characterized in that, it comprises the shaker arm that at least one leads to parts with curved profile, the position of this curved profile corresponds essentially to the upper end adjacent to each other (13) of above-mentioned unwind roll, and can help parts (5) in the above-mentioned zone relative, to slide with this framework bus, above-mentioned shaker arm is by a tensioned.

15. device as claimed in claim 6, it is characterized in that, above-mentioned unwind roll (13) has upper end (13a) and lower end (13b), this upper end (13a) is also hinged with it with above-mentioned scaffold (2) all-in-one-piece support body (15) near one, this lower end (13b) can with an adjustable distance be fastened to one with supporting member (2) all-in-one-piece seat element (16) on, to change the expansion of parts and transverse edge thereof.

16. device as claimed in claim 6 is characterized in that, above-mentioned unwind roll (13) is provided with the motor (13c) of machine-independent other operating mechanism.

17. device as claimed in claim 16 is characterized in that, above-mentioned motor (13c) makes this unwind roll (13) along the direction rotation opposite with the parts direction of advance.

18. device as claimed in claim 6, it is characterized in that, above-mentioned cutter sweep (11) comprises a rotating blade (18) by a motor (20) control, and this motor (20) is positioned at an operating position, and this operating position and above-mentioned vertical centre axis (6) are at a distance of a variable range.

19. device as claimed in claim 6, it is characterized in that, the above-mentioned device (8) that is used for smooth basically this cartridge (5) comprises a pair of parts compression parallel rollers (10), above-mentioned scaffold (2) comprises a pair of horizontal cross member (27), this horizontal cross member (27) is oriented orthogonal to above-mentioned drive roller sets (21) and has an auxiliary support (28) that is used for piece-presser roller (10) end, this auxiliary support (28) can replacedly make piece-presser roller (10) reorientate with 90 °, is used for stretching and uncut tubular fabric being gathered into two overlapped layerss.