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)
• Circuits Of Receivers In General (AREA)
• Variable-Direction Aerials And Aerial Arrays (AREA)
• Basic Packing Technique (AREA)
• Socks And Pantyhose (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=11452928

Family Applications (1)

Country Status (7)

Families Citing this family (7)

Family Cites Families (7)

• 2000
  • 2000-08-31 IT IT2000PI000055A patent/IT1316568B1/it active
• 2001
  • 2001-08-31 AU AU2001291816A patent/AU2001291816A1/en not_active Abandoned
  • 2001-08-31 WO PCT/EP2001/010080 patent/WO2002018696A1/en active IP Right Grant
  • 2001-08-31 DE DE60127429T patent/DE60127429T2/de not_active Expired - Fee Related
  • 2001-08-31 EP EP01971990A patent/EP1322810B1/de not_active Expired - Lifetime
  • 2001-08-31 US US10/362,852 patent/US20040108343A1/en not_active Abandoned
  • 2001-08-31 AT AT01971990T patent/ATE357548T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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