WO2002018696A1 - Method and device for automatic orientation of hosiery articles - Google Patents

Method and device for automatic orientation of hosiery articles Download PDF

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Publication number
WO2002018696A1
WO2002018696A1 PCT/EP2001/010080 EP0110080W WO0218696A1 WO 2002018696 A1 WO2002018696 A1 WO 2002018696A1 EP 0110080 W EP0110080 W EP 0110080W WO 0218696 A1 WO0218696 A1 WO 0218696A1
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WO
WIPO (PCT)
Prior art keywords
sock
support
rotation
automatic orientation
articles
Prior art date
Application number
PCT/EP2001/010080
Other languages
French (fr)
Inventor
Gianfranco Bagni
Original Assignee
Gianfranco Bagni
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gianfranco Bagni filed Critical Gianfranco Bagni
Priority to AU2001291816A priority Critical patent/AU2001291816A1/en
Priority to US10/362,852 priority patent/US20040108343A1/en
Priority to EP01971990A priority patent/EP1322810B1/en
Priority to DE60127429T priority patent/DE60127429T2/en
Publication of WO2002018696A1 publication Critical patent/WO2002018696A1/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H3/00—Inspecting textile materials
    • D06H3/16—Inspecting hosiery or other tubular fabric; Inspecting in combination with turning inside-out, classifying, or other handling
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C5/00—Shaping or stretching of tubular fabrics upon cores or internal frames
    • D06C5/005—Shaping or stretching of tubular fabrics upon cores or internal frames of articles, e.g. stockings

Definitions

  • the present invention relates to a method for automatic orientation of hosiery articles such as socks, knee socks or the like with respect to a predetermined plane.
  • the invention relates to a device that carries out this method.
  • an optical sensor detects the protrusion of the foot and stops immediately the rotation leaving the sock in the predetermined angular position.
  • Such a device even if it is technically effective, causes a high energy consumption due to the introduction of the air flow, and furthermore a difference in the flow rate of air is required depending upon the type of knitting quality of the socks.
  • a process of orientation of socks begins with the picking up the same from a special container. These are put automatically or manually in a random way on substantially cylindrical elongated supports, i.e. without taking care of their orientation.
  • the elongated support has at least one cylindrical portion.
  • the sock even if stretched elastically in order to match the shape of the support, has a protrusion oriented towards outside at the heel.
  • the rotation is effected of the sock same with respect to the axis of the support, in order to detect the protrusion of the heel according to a tangential longitudinal direction, by using optical sensors.
  • the axial rotation on the support necessary to the detection step of the protrusion of the heel, can be carried out in one of the two ways described below: - by integral rotation, i.e. the support with the sock put on it, rotates axially with respect to a support base; - by counter rotating movement of rollers tangential to the support, which is kept still. In this case the latter is as smooth as possible, whereas the rollers are coated of a friction surface, so that a relative movement of tangential circumferential rotation between sock and support is created.
  • a predetermined position i.e. the location of the heel or of the seam, depending upon it is a sock or a knee sock, on a chosen plane , the sock or of the knee sock is withdrawn oriented from the support.
  • the presence of the sock on the elongated support for orientation purposes is associated to steps of qualitative control of the same by an operator.
  • the integral rotation of the support and of the sock is provided, according to an angle of at least 180°, so that the operator can see all its surface without moving or using mirrors.
  • FIG. 1A and IB show two views of a stretched sock, seen according to two orthogonal longitudinal planes
  • - figure 2 shows a view of a stretched knee sock
  • - figure 3 shows an elongated support on which the sock or the knee sock of the previous figures has been put;
  • - figures 4A and 4B show the sock of figures 1A and IB put on the support of figure 3 and in two different positions of angular rotation
  • - figures 5A and 5B show the knee sock of figure 2 put on the support of figure 3 and in two different positions of angular rotation
  • - figure 6 shows a top plan view of a rotation device of the sock on the elongated support
  • - figure 7 shows a possible path followed by the sock on the support.
  • a sock provides differently knitted zones and precisely: a foot la, a heel lb, the leg lc and a leg collar Id.
  • Such zones have different functions and precisely the foot la is thickly knitted, heel lb is thickly knitted and curved, the leg lc has a tubular knitting, often with pattern, and the leg collar Id is a tubular collar knitted with elastic thread.
  • Such zones have been shown with different graphical background.
  • a knee sock 2, or tubular sock, instead, as shown in figure 2, has a tubular knitting with at the end a closure seam 2a.
  • the foot is not knitted but is shaped when steaming the knee sock on forms.
  • elongated support 3 For orienting sock 1 or knee sock 2 it is possible, according to the invention, putting them on an elongated support 3 (figure 3) .
  • the elongated support 3 notwithstanding shown of plain cylindrical shape , can have also grooves or oval or rectangular with rounded edges shape.
  • a optical device 11 detects this protrusion lb and stops automatically the counter rotating movement of dragging rollers . Furthermore, since heel lb has a curved profile with a central vertex, the range 11 of the optical sensor 4 can detect this vertex calculating an average of the measured values, with possibility of sufficient precision for detecting the plane of orientation 9 (figure 6) . Once the sensor 4 or 5 has detected heel lb or seam 2a, the rotation of sock 1 or of knee sock 2 is discontinued and the relative angular position is maintained as reference position for following finishing steps .
  • a plurality of sensors 4 or 5 can be provided, for example two, three or four angularly spaced sensors.
  • a control software is provided which, according to the sensor that detects heel lb or seam 2a, a further rotation to the sock up to the orientated position.
  • an array of optical sensors can be provided, for example CCD or equivalent, which provides a matrix of signals of presence of the heel or of the seam.
  • the sensors detect the shape of the sock from the above.
  • they detect a line having a greater density, i.e. the seam.
  • mechanical sensors can be provided having tracing points capable of giving signals of presence when are touched by the heel or when they feel an higher thickness of the seam.
  • the rotation of the sock may be carried out by means of axial integral rotation of support 3 with sock 1 on a support base. Otherwise, as shown in figure ⁇ , the rotation of the sock can be carried out by means of counter rotating movement of rollers 6, 6' tangential to the support that is kept still.
  • the elongated support 3 is as smooth as possible, whereas the rollers 6, 6' are coated by a friction surface, so that a relative movement of circumferentially tangential rotation is created between sock and support.
  • Support 3 can be a carrier in a production cycle. In fact, the sock must follow a path that comprises various work stations. In particular, with reference to figure 7, the following steps are carried out:
  • sock 1 is put on support 3; more precisely, sock 1 is put on support 3 manually or automatically in a random way, being support 3 of shape preferably cylindrical elongated and vertical. Furthermore said support 3 follows the direction of a guide 8.
  • a qualitative control of the sock is carried out; in particular support 3 with sock 1, in addition to sliding along the direction of guide 8, rotates axially about its own vertical axis for an angle of at least 180°. This rotation allows the operator 5 to check quickly the quality of the sock excluding preliminarily from the final packaging those socks having knitting defects, color defects and other.
  • the control can be carried out also by optical electronic instruments for defect recognition.
  • sock 1 that is now in a predetermined plane, is withdrawn from support 3 for successive finishing steps, such as for example steaming and/or seaming.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Basic Packing Technique (AREA)
  • Socks And Pantyhose (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

A sock (1) to be oriented is put random on an elongated support (3). Then a rotation about its own axis is given. In case the sock (1) has a heel (1b), notwithstanding it is elastically stretched on the support (3) this heel is visible since it forms a slight but relevant protrusion. In case the sock is tubular it is fully stretched on the support (3), but the seam of the foot is visible at the top of the support (3). Then during the rotation the passage of the heel (1b) is detected or the seam is detected by means of an optical sensor (4). While sock (1) is in rotation on the support (3), and then with it the protrusion (1b). An optical beam detects this protrusion (1b) or seam and stops the rotation of the sock. Once the sensor (4) has detected the heel (1b) or the seam, the rotation of the sock (1) is discontinued and the relative angular position is kept as reference position for following operations of finishing. The rotation of the sock can be carried out by means of axial integral rotation of the support (3) with the sock (1) with respect to a support base. Or, the rotation of the sock can be carried out by means of counter rotating movement of rollers (6, 6') tangential to the support (3). The support (3) can be part of a production cycle wherein the sock follows a path that comprises various work stations (10, 20, 30, 40).

Description

TITLE METHOD AND DEVICE FOR AUTOMATIC ORIENTATION OF HOSIERY ARTICLES
DESCRIPTION
Field of the invention The present invention relates to a method for automatic orientation of hosiery articles such as socks, knee socks or the like with respect to a predetermined plane.
Furthermore the invention relates to a device that carries out this method.
Background of the invention
In the following description reference is made to the orientation of the socks, being it clear that this method can be extended to the orientation of knee socks and other similar articles that have asymmetries that require a correct angular positioning.
The need is felt of an automatic orientation of hosiery articles such as socks, knee socks or similar in order to put them on steaming forms for example for steaming or finishing purposes.
This need is much more felt in an automatic production cycle. In particular, before reaching the final packaging of an hosiery article, it is necessary follow a path that comprises various manufacturing steps; one of them relates to its orientation according to a predetermined plane of reference, so that the sock at the end reaches the consumer arranged folded in this plane.
The point where the sock is oriented is normally upstream of the steaming step. In the traditional steaming systems, the sock is put onto the steaming forms oriented manually by an operator. This causes obviously an excessive manual workload and waste of time. The problem of the automatic orientation of socks has been also considered and in part also solved.
In fact according to the technique of a method presently known, described in EP0878573, a sock after having been picked up from special containers, is put automatically on vertical elongated supports, reaching finally a position hanging towards below.
Then, an air flow crosses the vertical support from the above towards below inflating the hanging sock that stiffens following the shape of the foot.
Then, it is rotated coaxially to the elongated support and during the rotation an optical sensor detects the protrusion of the foot and stops immediately the rotation leaving the sock in the predetermined angular position.
Such a device, even if it is technically effective, causes a high energy consumption due to the introduction of the air flow, and furthermore a difference in the flow rate of air is required depending upon the type of knitting quality of the socks.
Furthermore a drawback is given by the impossibility of handling socks with foot not yet sewn, which cannot be inflated. This need can occur in the passage from the step of knitting to that of finishing. Summary of the invention
It is therefore object of the present invention to provide a method for automatic orientation of socks, knee socks or similar that has not the drawbacks of the existing methods . It is furthermore object of the invention to provide a device that carries out this method.
According to the invention, a process of orientation of socks begins with the picking up the same from a special container. These are put automatically or manually in a random way on substantially cylindrical elongated supports, i.e. without taking care of their orientation.
Even in the case of manual introduction, in any case a reduced manual workload is required since the operator puts the socks onto the supports without taking care of their orientation and then in an extremely quick way.
The elongated support has at least one cylindrical portion. The sock, even if stretched elastically in order to match the shape of the support, has a protrusion oriented towards outside at the heel.
Then, the rotation is effected of the sock same with respect to the axis of the support, in order to detect the protrusion of the heel according to a tangential longitudinal direction, by using optical sensors. The axial rotation on the support, necessary to the detection step of the protrusion of the heel, can be carried out in one of the two ways described below: - by integral rotation, i.e. the support with the sock put on it, rotates axially with respect to a support base; - by counter rotating movement of rollers tangential to the support, which is kept still. In this case the latter is as smooth as possible, whereas the rollers are coated of a friction surface, so that a relative movement of tangential circumferential rotation between sock and support is created.
Once detected the protrusion by the optical sensors the mechanism of rotation stops automatically and the angular predetermined position of the sock is thus determined. Reference has been made above to the extension of this method to knee socks, tubular socks with seam on the foot or similar articles; however, it must be noted that in the specific case of a knee sock or sock, of tubular shape, instead of the detection of the heel the detection of the seam at the end of the foot is effected. This detection can be carried out using optical sensors or, alternatively, of tracing points.
In both cases, once reached a predetermined position, i.e. the location of the heel or of the seam, depending upon it is a sock or a knee sock, on a chosen plane , the sock or of the knee sock is withdrawn oriented from the support.
Advantageously, the presence of the sock on the elongated support for orientation purposes is associated to steps of qualitative control of the same by an operator.
In particular, the integral rotation of the support and of the sock is provided, according to an angle of at least 180°, so that the operator can see all its surface without moving or using mirrors. Brief description of the drawings
Further characteristics of the method and of the device for automatic orientation of hosiery articles according to the present invention will be made clearer with the following description of an embodiment thereof, exemplifying but not limitative, with reference to the attached drawings, wherein:
- figures 1A and IB show two views of a stretched sock, seen according to two orthogonal longitudinal planes;
- figure 2 shows a view of a stretched knee sock; - figure 3 shows an elongated support on which the sock or the knee sock of the previous figures has been put;
- figures 4A and 4B show the sock of figures 1A and IB put on the support of figure 3 and in two different positions of angular rotation; - figures 5A and 5B show the knee sock of figure 2 put on the support of figure 3 and in two different positions of angular rotation;
- figure 6 shows a top plan view of a rotation device of the sock on the elongated support; - figure 7 shows a possible path followed by the sock on the support.
Description a preferred embodiment
With reference to figures 1A and IB, a sock provides differently knitted zones and precisely: a foot la, a heel lb, the leg lc and a leg collar Id. Such zones have different functions and precisely the foot la is thickly knitted, heel lb is thickly knitted and curved, the leg lc has a tubular knitting, often with pattern, and the leg collar Id is a tubular collar knitted with elastic thread. Such zones have been shown with different graphical background.
A knee sock 2, or tubular sock, instead, as shown in figure 2, has a tubular knitting with at the end a closure seam 2a. The foot is not knitted but is shaped when steaming the knee sock on forms.
For orienting sock 1 or knee sock 2 it is possible, according to the invention, putting them on an elongated support 3 (figure 3) . The elongated support 3, notwithstanding shown of plain cylindrical shape , can have also grooves or oval or rectangular with rounded edges shape.
With reference to figure 4, for automatic orientation of sock 1 or of knee sock 2, they can be put random on support 3 (figure 4A or 5A) and then a rotation about its own axis is given to the support.
Notwithstanding sock 1 is elastically stretched on support 3, heel lb is visible since it has a slight but relevant protrusion. Concerning knee sock 2, it is stretched on support 3, but seam 2a is visible at the top 3a of support 3.
Then (figures 4B or 5B) , during the rotation the passage is detected of heel lb or of seam 2a by means of an optical sensor 4 or 5 eccentric with respect to support - β -
3. Since sock 1 rotates on support 3, and then with it protrusion lb rotates, a optical device 11 detects this protrusion lb and stops automatically the counter rotating movement of dragging rollers . Furthermore, since heel lb has a curved profile with a central vertex, the range 11 of the optical sensor 4 can detect this vertex calculating an average of the measured values, with possibility of sufficient precision for detecting the plane of orientation 9 (figure 6) . Once the sensor 4 or 5 has detected heel lb or seam 2a, the rotation of sock 1 or of knee sock 2 is discontinued and the relative angular position is maintained as reference position for following finishing steps . In an different embodiment, for reducing the angle of rotation of the sock necessary for reaching a correct orientation, A plurality of sensors 4 or 5 can be provided, for example two, three or four angularly spaced sensors. In this case, a control software is provided which, according to the sensor that detects heel lb or seam 2a, a further rotation to the sock up to the orientated position.
In a further embodiment, an array of optical sensors can be provided, for example CCD or equivalent, which provides a matrix of signals of presence of the heel or of the seam. In the first case the sensors detect the shape of the sock from the above. In the second case they detect a line having a greater density, i.e. the seam.
Instead of optical sensors, mechanical sensors can be provided having tracing points capable of giving signals of presence when are touched by the heel or when they feel an higher thickness of the seam.
The rotation of the sock may be carried out by means of axial integral rotation of support 3 with sock 1 on a support base. Otherwise, as shown in figure β, the rotation of the sock can be carried out by means of counter rotating movement of rollers 6, 6' tangential to the support that is kept still. In this case, the elongated support 3 is as smooth as possible, whereas the rollers 6, 6' are coated by a friction surface, so that a relative movement of circumferentially tangential rotation is created between sock and support.
Support 3 can be a carrier in a production cycle. In fact, the sock must follow a path that comprises various work stations. In particular, with reference to figure 7, the following steps are carried out:
- station 10; this is the step where sock 1 is put on support 3; more precisely, sock 1 is put on support 3 manually or automatically in a random way, being support 3 of shape preferably cylindrical elongated and vertical. Furthermore said support 3 follows the direction of a guide 8.
- station 20; a qualitative control of the sock is carried out; in particular support 3 with sock 1, in addition to sliding along the direction of guide 8, rotates axially about its own vertical axis for an angle of at least 180°. This rotation allows the operator 5 to check quickly the quality of the sock excluding preliminarily from the final packaging those socks having knitting defects, color defects and other. The control can be carried out also by optical electronic instruments for defect recognition.
- station 30; support 3 stops its movement of translation along guide 8; then the plane of orientation 9 of the sock (figure 6) is detected in the way above described. Then the support with the oriented sock goes on along guide 8;
- station 40; sock 1 that is now in a predetermined plane, is withdrawn from support 3 for successive finishing steps, such as for example steaming and/or seaming.
Finally, it must be noted that the qualitative control of socks can be made both before and after the step of orientation of the socks, as well as in different steps of the same cycle.
The foregoing description a specific embodiment will so fully reveal the invention according to the conceptual point of view, so that others, by applying current knowledge, will be able to modify and/or adapt for various applications such an embodiment without further research and without parting from the invention, and it is therefore to be understood that such adaptations and modifications will have to be considered as equivalent to the specific embodiment. The means and the materials to realise the different functions described herein could have a different nature without, for this reason, departing from the field of the invention. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.

Claims

1. A method for automatic orientation of hosiery articles such as socks, knee socks and the like, characterized in that it comprises the steps of: - picking the articles from a container;
- putting the articles on elongated supports, without taking care of their orientation, said articles, even if stretched elastically in order to match the shape of the support, creating a protruded zone that can be detected with respect to said support;
- detection of said protruding zone by means of sensors;
- storing said protruding zone as plane of reference of the article when it is withdrawn from the support for further manufacturing steps.
2. Method for automatic orientation of hosiery articles, in particular socks, according to claim 1, wherein the step is provided of rotation of said sock with respect to the axis of said support.
3. Method for automatic orientation of hosiery articles, in particular socks, according to claim 1, wherein said protruding zone is the protrusion of the heel, said sensors individuating said protrusion according to a tangential longitudinal direction with respect to said support .
4. Method for automatic orientation of hosiery articles, in particular knee socks, according to claim 1, wherein said protruding zone is the seam of the foot, said sensors individuating said seam by means chosen among: tracer points in contact with said support; optical sensors on said support.
5. Method for automatic orientation of hosiery articles according to claim 2, wherein the axial rotation of said sock is carried out by means of integral rotation of said support and said sock.
6. Method for automatic orientation of hosiery articles according to claim 2, wherein the axial rotation of said sock is carried out by means of counter rotating movement of rollers tangential to the sock keeping still the support.
7. Method for automatic orientation of hosiery articles according to claim 2, wherein, the rotation of said sock with respect to the axis of said support once detected the protruding zone stops, thus individuating the angular orientation of the sock.
8. Method for automatic orientation of hosiery articles according to claim 1, wherein steps are provided of qualitative control on said elongated support, the latter when passing through a station of verification at least in part rotating about itself.
9. Apparatus of automatic orientation of hosiery articles characterized in that it comprises means for carrying out the steps described in the claims from 1 to 8.
PCT/EP2001/010080 2000-08-31 2001-08-31 Method and device for automatic orientation of hosiery articles WO2002018696A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2001291816A AU2001291816A1 (en) 2000-08-31 2001-08-31 Method and device for automatic orientation of hosiery articles
US10/362,852 US20040108343A1 (en) 2000-08-31 2001-08-31 Method and device for automatic orientation of hosiery articles
EP01971990A EP1322810B1 (en) 2000-08-31 2001-08-31 Method and device for automatic orientation of hosiery articles
DE60127429T DE60127429T2 (en) 2000-08-31 2001-08-31 METHOD AND DEVICE FOR AUTOMATIC ORIENTATION OF SWEEPWEAR

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000PI000055A IT1316568B1 (en) 2000-08-31 2000-08-31 METHOD AND DEVICE FOR THE AUTOMATIC ORIENTATION OF ITEMS OF BINDINGS SUCH AS SOCKS, KNEE-SOCKS OR SIMILAR.
ITPI2000A000055 2000-08-31

Publications (1)

Publication Number Publication Date
WO2002018696A1 true WO2002018696A1 (en) 2002-03-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/010080 WO2002018696A1 (en) 2000-08-31 2001-08-31 Method and device for automatic orientation of hosiery articles

Country Status (7)

Country Link
US (1) US20040108343A1 (en)
EP (1) EP1322810B1 (en)
AT (1) ATE357548T1 (en)
AU (1) AU2001291816A1 (en)
DE (1) DE60127429T2 (en)
IT (1) IT1316568B1 (en)
WO (1) WO2002018696A1 (en)

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ITUB20155766A1 (en) * 2015-11-20 2017-05-20 Golden Lady Co Spa MACHINE AND METHOD TO IRON TUBULAR MESH MANUFACTURES

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ITFI20020106A1 (en) * 2002-06-18 2003-12-18 Matec Spa DEVICE AND METHOD FOR DETECTING THE ORIENTATION OF MANUFACTURERS SUCH AS MEN'S SOCKS AND SOCKS
US20090038520A1 (en) * 2004-04-16 2009-02-12 Golden Lady Company S.P.A. Machine for handling tubular knitted articles, such as socks or the like
EP1857582B1 (en) * 2006-05-18 2008-12-24 Santoni S.p.A. Automatic device and method for orienting a textile item on a support block
US10035169B2 (en) 2015-05-21 2018-07-31 Nike, Inc. Method and apparatus for retaining and transferring an article
EP4050143A1 (en) * 2018-04-13 2022-08-31 Nike Innovate C.V. Assemblies for textile manufacturing and related methods
US11486083B2 (en) * 2020-09-22 2022-11-01 Gabriela Doyle Sock-pair joining device

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ITUB20155766A1 (en) * 2015-11-20 2017-05-20 Golden Lady Co Spa MACHINE AND METHOD TO IRON TUBULAR MESH MANUFACTURES
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Also Published As

Publication number Publication date
DE60127429T2 (en) 2007-11-29
IT1316568B1 (en) 2003-04-24
US20040108343A1 (en) 2004-06-10
DE60127429D1 (en) 2007-05-03
ITPI20000055A1 (en) 2002-03-03
ITPI20000055A0 (en) 2000-08-31
EP1322810A1 (en) 2003-07-02
EP1322810B1 (en) 2007-03-21
ATE357548T1 (en) 2007-04-15
AU2001291816A1 (en) 2002-03-13

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