EP0664354A1 - Verfahren und Vorrichtung zum Positionieren der durch Nähen zu verbindenden Ränder vor zwei Geweben in einer Nähmaschine - Google Patents

Verfahren und Vorrichtung zum Positionieren der durch Nähen zu verbindenden Ränder vor zwei Geweben in einer Nähmaschine Download PDF

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Publication number
EP0664354A1
EP0664354A1 EP95100119A EP95100119A EP0664354A1 EP 0664354 A1 EP0664354 A1 EP 0664354A1 EP 95100119 A EP95100119 A EP 95100119A EP 95100119 A EP95100119 A EP 95100119A EP 0664354 A1 EP0664354 A1 EP 0664354A1
Authority
EP
European Patent Office
Prior art keywords
edges
joined
channels
stitching
cloths
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP95100119A
Other languages
English (en)
French (fr)
Inventor
Roberto Resta
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resta SRL
Original Assignee
Resta SRL
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 Resta SRL filed Critical Resta SRL
Publication of EP0664354A1 publication Critical patent/EP0664354A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B35/00—Work-feeding or -handling elements not otherwise provided for
    • D05B35/06—Work-feeding or -handling elements not otherwise provided for for attaching bands, ribbons, strips, or tapes or for binding
    • D05B35/062—Work-feeding or -handling elements not otherwise provided for for attaching bands, ribbons, strips, or tapes or for binding with hem-turning
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B11/00—Machines for sewing quilts or mattresses
    • D05B11/005—Machines for sewing quilts or mattresses for sewing the edges of mattresses

Definitions

  • the present invention relates to a method for positioning the edges of two cloths to be joined by stitching in a sewing machine and to a device for performing this method.
  • cloth refers to any type of flexible surface constituted by one or more layers of fabric or the like combined with one or more layers of soft material such as wool or sponge rubber.
  • the invention is particularly but not exclusively aimed at producing the covering of innerspring mattresses.
  • the coverings of innerspring mattresses are constituted by an upper and a lower cloths which are rectangular and are mutually connected by a perimetric band.
  • the band is coupled to the cloths by stitching with the aid of a so-called hemming machine which stitches together the adjacent edges of the band and of the cloths.
  • a principal aim therefore of the present invention is to provide a new method that allows to position the edges to be joined without resorting to manual interventions and thus to fully automate the stitching cycle.
  • This aim is achieved by a method for positioning the edges of two cloths to be joined by means of a stitching line in a sewing machine, characterized in that, during a first step, a longitudinal enlarged portion that is continuous along the entire length to be joined of said edges is formed along each edge; in that, during a second step, said enlarged portions are guided through respective guiding channels that guide them so that said enlarged portions are parallel and adjacent when they exit from said channels; and in that, during a third step, when they exit from said channels, said edges are mutually joined by means of stitching lines that run along said longitudinal enlarged portions.
  • an object of the present invention is a device for performing the above method.
  • the characteristics of said device are defined in claims 4 to 8.
  • the reference numeral 1 designates a generic cloth which in order to set the conceptual framework is assumed to be meant to form the covering of mattresses.
  • the cloth 1 thus has a rectangular shape and is constituted by an outer fabric 2 and by an inner fabric 3 between which a layer 4 of spongy elastic material, for example sponge rubber, is placed.
  • the fabrics 2 and 3 and the layer 4 are mutually joined by quilting lines 5 having any pattern.
  • the cross-section of the profiled element 6 is composed of a flat wing 7, on which the edge of the cloth 1 is fixed by means of a stitching line 8, and of a rib 9 that protrudes from one face of the wing 7, forming a longitudinal tubular enlarged portion.
  • two cloths 1 are arranged above and below a metal cage that forms the elastic frame of the mattress, and their perimetric edges are mutually connected by a band that perimetrically surrounds the cage.
  • Figure 1 illustrates the region where an upper cloth 1 and the perimetric band 10 of the covering of the mattress join; said perimetric band is assumed to be constituted substantially like the cloth 1, that is to say, to be composed of a single- or multilayer cloth having, along its parallel edges, respective profiled elements 11 which are identical to the profiled elements 6 of the cloth 1.
  • the band 10 is arranged at right angles to the cloths 1, as shown in figure 1, so that the wings 7 of the profiled elements 6 and 11 are in contact on the plane that bisects the right angle delimited by the cloth 1 and by the band 10.
  • a tape 12 is then applied on the profiled elements thus arranged by means of a hemming machine 13 (see figures 5 and 6) and covers the joint.
  • the hemming machine 13 is preferably tilted by 45 o with respect to the cloths 1, so that the stitching needle 14 can pass at right angles through the wings 7 and join them, covering them with the tape 12, along the stitching line 15 (figure 1).
  • a fundamental prerogative of the present invention is the provision of a device that allows to guide the edges to be joined of the cloths 1 and of the band 10, so as to avoid on one hand the need to resort to specialized personnel capable of performing this operation manually and, on the other hand, allow to automate the mutual assembly of the cloths and of the band.
  • Said device (see figures 4 and 6) comprises a sort of clamp 16 which is located upstream of the hemming machine and is composed of a stationary plate 17, which is fixed in any manner to the supporting framework of the hemming machine 13 at right angles to the needle 14 and thus at 45 o with respect to a horizontal working surface.
  • Each lever 18 and 19 are articulated on the opposite faces of the flat plate 17; each lever is composed of two arms 20, 21 and 22, 23.
  • the articulation points are constituted by pivots 24, 25 which are supported by lobes 26, 27 that protrude from the plate 17 with which they are rigidly associated.
  • each pair delimit an obtuse angle between them.
  • a spring 28 furthermore acts between the pair of arms 21 and 23 and keeps them spaced apart, so that the other two arms 20 and 22, which constitute the jaws of the clamp 16, rest on the opposite faces of the plate 17.
  • Respective recesses 29 and 30 are formed at the ends of the arms 20 and 22 on the side directed towards the plate 17; when the arms 20 and 22 rest on the plate 17, they form channels whose cross-section is complementary to the cross-section of the profiled elements 6 and 11, so as to allow to position and guide the cloths and the band during stitching, as will become apparent hereinafter. Accordingly, each channel comprises a rounded portion for the passage of the ribs 9 of the profiled elements 6 and 11 and a flattened portion through which the wing 7 slides together with the edge of the cloth fixed thereto.
  • the clamp 16 is orientated at 45 o with respect to the edges of the cloth and of the band 10 so that it is possible to act on the levers 18 and 19 without being hindered by other parts of the device. Accordingly, the channels 29 and 30 pass obliquely through the arms 20 and 22 of the clamp to be aligned with the profiled elements 6 and 11.
  • the clamp 16 is arranged upstream of the hemming machine 13.
  • the axis of the needle 14 is designated by the same reference numeral in figure 4.
  • the letter A designates the direction of the movement of the product during stitching, and conveniently the channels 29 and 30 form a guide in the direction A to facilitate the entry of the profiled elements 6 and 11 therein.
  • a block 31 is arranged between the needle 14 and the clamp 16 and keeps the edges of the cloth 1 and of the band 10 in position while the tape 12 is applied to them.
  • Said block 31 (see figure 7) is constituted by a body which is fixed to a stationary bracket 32 and has, at right angles to the direction A, a semicircular slit 33 that ends with a 45 o chamfer 34 arranged on a plane that is parallel to the plane of the clamp 16.
  • a cavity 35 is formed on the side of the block 31 that lies opposite to the side where the tape 12 enters; said cavity is shaped like a letter U that is open towards the edge of the product.
  • the cavity 35 is narrower than the slit 33, so that two ribs 36 and 37 form at the chamfer 34, allowing to overturn and bend the tape 12 in a U-like shape in the direction A above the profiled elements 6 and 11 of the cloth 1 and of the band 10.
  • the profiled elements 6 and 11 are applied along the edges of the cloths 1 and of the band 10 that must be joined. The edges are then aligned on the opposite faces of the plate 17 and, while the clamp 16 is kept open, are arranged at the channels 29 and 30. By closing the clamp, the profiled elements 6 and 11 engage in the channels 29 and 30, which keep them exactly mutually opposite as they advance below the stitching needle 14.
  • edges of the cloth 1 and of the band 10 are guided and positioned automatically, without corrective actions on the part of the personnel.
  • the exact match between the profiled element 6 of the cloth 1 and the profiled element 11 of the band 10 allows to apply the tape 12 automatically so as to cover the joint.
  • a longitudinal enlarged portion along the edges of the cloth and of the band can be provided as shown in figure 3, by wrapping the edge of the cloth around a simple longitudinal element 38 which can be constituted by a profiled element having a circular cross-section or a cord or the like.
  • the edge of the cloth can be fixed to the profiled element by hot-welding or glueing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP95100119A 1994-01-10 1995-01-05 Verfahren und Vorrichtung zum Positionieren der durch Nähen zu verbindenden Ränder vor zwei Geweben in einer Nähmaschine Withdrawn EP0664354A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO940003A IT1273211B (it) 1994-01-10 1994-01-10 Procedimento per posizionare i bordi di due panni da unire mediante cucitura in una macchina cucitrice e dispositivo per l'attuazione di tale procedimento
ITBO940003 1994-01-10

Publications (1)

Publication Number Publication Date
EP0664354A1 true EP0664354A1 (de) 1995-07-26

Family

ID=11339392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95100119A Withdrawn EP0664354A1 (de) 1994-01-10 1995-01-05 Verfahren und Vorrichtung zum Positionieren der durch Nähen zu verbindenden Ränder vor zwei Geweben in einer Nähmaschine

Country Status (2)

Country Link
EP (1) EP0664354A1 (de)
IT (1) IT1273211B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1598464A1 (de) * 2004-05-21 2005-11-23 Carlo Alberto Raffaeli Vorfaltungsmaschine für Bänder in Umrandungsmaschinen, insbesondere für Matrazen
KR100843669B1 (ko) 2008-01-10 2008-07-04 (주)티 에스 에이 콜렉션 원단의 이음부 및 이음방법

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2116987A (en) * 1936-03-04 1938-05-10 Union Special Machine Co Sewing machine
US2915027A (en) * 1956-07-14 1959-12-01 Slumberland Ltd Mattress stitching apparatus
US4155317A (en) * 1976-11-19 1979-05-22 France Bed Co., Ltd. Machine for sewing together fabric pieces
WO1995000693A1 (fr) * 1993-06-28 1995-01-05 Matsushita Industrial Co., Ltd. Methode de realisation simple et fiable de la couture d'une bande d'angle par fixation d'une corde d'ame au bord du tissu a matelas

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2116987A (en) * 1936-03-04 1938-05-10 Union Special Machine Co Sewing machine
US2915027A (en) * 1956-07-14 1959-12-01 Slumberland Ltd Mattress stitching apparatus
US4155317A (en) * 1976-11-19 1979-05-22 France Bed Co., Ltd. Machine for sewing together fabric pieces
WO1995000693A1 (fr) * 1993-06-28 1995-01-05 Matsushita Industrial Co., Ltd. Methode de realisation simple et fiable de la couture d'une bande d'angle par fixation d'une corde d'ame au bord du tissu a matelas

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1598464A1 (de) * 2004-05-21 2005-11-23 Carlo Alberto Raffaeli Vorfaltungsmaschine für Bänder in Umrandungsmaschinen, insbesondere für Matrazen
KR100843669B1 (ko) 2008-01-10 2008-07-04 (주)티 에스 에이 콜렉션 원단의 이음부 및 이음방법

Also Published As

Publication number Publication date
ITBO940003A0 (it) 1994-01-10
IT1273211B (it) 1997-07-07
ITBO940003A1 (it) 1995-07-10

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