EP0564987B1 - Nadelstab für Kettenstrecken - Google Patents

Nadelstab für Kettenstrecken Download PDF

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Publication number
EP0564987B1
EP0564987B1 EP19930105449 EP93105449A EP0564987B1 EP 0564987 B1 EP0564987 B1 EP 0564987B1 EP 19930105449 EP19930105449 EP 19930105449 EP 93105449 A EP93105449 A EP 93105449A EP 0564987 B1 EP0564987 B1 EP 0564987B1
Authority
EP
European Patent Office
Prior art keywords
groove
carrier
faller
thickness
metal
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.)
Revoked
Application number
EP19930105449
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0564987A1 (de
Inventor
Rainer F. Schmauser
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.)
Leonhard Schmauser & Co Firma GmbH
Original Assignee
Leonhard Schmauser & Co Firma GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6455890&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0564987(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Leonhard Schmauser & Co Firma GmbH filed Critical Leonhard Schmauser & Co Firma GmbH
Publication of EP0564987A1 publication Critical patent/EP0564987A1/de
Application granted granted Critical
Publication of EP0564987B1 publication Critical patent/EP0564987B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/02—Gill boxes or other drafting machines employing fallers or like pinned bars
    • D01H5/12—Details
    • D01H5/14—Pinned bars

Definitions

  • the invention relates to a needle bar for chain sections, in which a metal support bar is provided with a longitudinal groove which is delimited by a longer leg and a shorter leg, each forming an inner surface, and in which a carrier strip of a pinstrip is inserted in the groove is and the support bar has a solid plastic, a row of needles receiving strip core and two strip-like metal strips delimiting them, which are assigned with outer surfaces to the inner surfaces of the legs, the support strip before insertion into the groove a pre-thickness has, which is assigned a groove width of the support rod groove.
  • the solid or solid, ie not foamy plastic is rigid in that it is not compressible to a considerable extent.
  • the pre-thickness of the carrier strip is slightly smaller than the width of the groove and the carrier strip is relatively easily inserted into the groove during assembly.
  • the carrier strip is held in the groove by gluing, the outer surfaces of the metal strips sticking to the inner surfaces of the legs.
  • the metal strips are glued to the metal leg using a hot-melt adhesive or a two-component adhesive.
  • the needles are in contact with the metal bands. Gluing the carrier strip in the groove of the carrier rod presents complex difficulties.
  • the gluing has so far been necessary because the support strip provided with the metal strips is under the given chain stretching loads because of the shorter leg in a clamping by mere press fit in the groove would not be sufficiently stuck, such a press fit would be difficult to achieve with regard to manufacturing tolerances.
  • An object of the invention is therefore to provide a needle bar of the type mentioned, which is held in a simple manner and yet safely in the support rod.
  • the needle bar according to the invention solves this problem, characterized in that the pre-thickness of the carrier strip is 8.5 to 11.5% greater than the groove width, that a layer formed by the plastic is provided between the needles and each metal band, whose thickness is at least 4% of the pre-thickness of the carrier strip and that the plastic is elastically compressible with a modulus of elasticity of 1,400 to 1,800 N / mm2.
  • the substantially bubble-free, full plastic is pressed in volume when the carrier bar is pressed into the groove, i.e. compressed in itself.
  • the volume compression of the plastic is elastic, so that the carrier rod is permanently sufficiently tight in the groove.
  • the metal strips, which have a stabilizing effect on the support rod, are retained. A sticking of the support rod in the groove is avoided.
  • the tight fit given by elastic compression is given in spite of the shorter leg, which is towered over by the support rod. Since the needles do not completely bridge the distance between the two metal strips, there is an elastically compressible plastic layer between each metal strip and the needle.
  • the clamping forces of the support rod in the groove are given by the elastic expansion pressure of the plastic. Any manufacturing tolerances are simply taken into account.
  • the layer thickness is determined upwards by the needle thickness and the groove width.
  • the pre-thickness is 9-11% greater than the groove width, if the layer thickness is at least 5% of the pre-thickness and / or if the elastic modulus is 1,500 - 1,700 n / mm2. These values prove to be particularly useful in practice.
  • the plastic is usually low molecular weight and a mixture based on polyamide.
  • the plastic used has the following properties: a flexural modulus of elasticity of about 2 x 103 mm2 is provided and the hardness according to DIN 53456 is e.g. at 80 N / mm2. After being pressed into the groove, the plastic does not shrink and the elasticity does not decrease significantly either. The plastic is therefore not plastically deformable.
  • the groove and the carrier strip are generally constant over the length in width or thickness.
  • the shorter leg, measured from the bottom of the groove, is usually at most a third, e.g. approx. 40% or 52%, the size of the longer leg.
  • the cross-section of the needles is e.g. rectangular flat with rounded faces or usually round, because then they are equally stiff on all sides.
  • the metal strips are usually sheet steel strips and have e.g. a thickness of 0.08-0.25 mm.
  • the inner surfaces of the legs and the outer surfaces of the metal strips are each made of metal and are usually smooth, i.e. non-protruding and not roughened. In spite of the smoothness of the inner and outer surfaces, the carrier strip remains firmly in place. It is therefore particularly expedient and advantageous if the metal strips with a smooth outer surface each rest on a smooth inner surface of one of the legs.
  • the metal strips are bent towards the bottom of the groove to form a taper of the carrier strip towards one another in the end region.
  • the taper serving as a threading aid is designed in a simple manner without impairing the flat contact of the outer surfaces with the inner surfaces too much.
  • the plastic is provided a protrusion higher than the metal strips. This is the result of careful attention being paid to ensuring that the plastic is pressed between the two metal strips with no bubbles or voids.
  • the groove width is approximately 2.20 mm and the pre-thickness of the
  • the carrier strip has an oversize of approx. 10% of the groove width.
  • the carrier rod which has not yet been compressed, there is a plastic layer of approximately 0.10 mm between each metal band and the needle, ie each layer has a thickness of approximately 4.5% of the groove width.
  • the shorter leg is, for example, approx. 5 mm high, the height of the curved end area being equal to or less than 1 mm.
  • the needle bar according to the drawing has a metal carrier bar 1, which forms a longitudinally shorter leg 2 and a parallel longer longitudinal leg 3, which delimit a groove 4 between them.
  • a carrier strip 5 of a pinstrip 6 is inserted into the groove 4.
  • the carrier strip 5 is equipped with a row of needles 7 which are parallel to one another and spaced apart from one another.
  • the two legs 2, 3 each form a smooth inner surface 8, against which a smooth outer surface 9 of the carrier strip 5 abuts continuously.
  • the height of the shorter leg 2 is considerably smaller than the height of the carrier strip, which projects above the height of the shorter leg 2 and is in constant contact with the longer leg 3.
  • the carrier strip 5 has a strip-like wide metal strip 10 on both longitudinal sides, which is bent in the lower end region 11 to form a taper.
  • the needles 7 begin at the lower end with the metal strips 10.
  • the space between the two metal strips 10 which is not occupied by the needles 7 is filled with plastic 12, which is not only between two adjacent needles 7, but also between each needle and each metal strip 10 forms a layer 13.
  • the plastic 12 forms a protrusion 14 which projects above the metal strips 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Sewing Machines And Sewing (AREA)
EP19930105449 1992-04-03 1993-04-01 Nadelstab für Kettenstrecken Revoked EP0564987B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19924211075 DE4211075C1 (enExample) 1992-04-03 1992-04-03
DE4211075 1992-04-03

Publications (2)

Publication Number Publication Date
EP0564987A1 EP0564987A1 (de) 1993-10-13
EP0564987B1 true EP0564987B1 (de) 1995-07-26

Family

ID=6455890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930105449 Revoked EP0564987B1 (de) 1992-04-03 1993-04-01 Nadelstab für Kettenstrecken

Country Status (2)

Country Link
EP (1) EP0564987B1 (enExample)
DE (1) DE4211075C1 (enExample)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE794920A (fr) * 1972-02-05 1973-08-02 Mackie & Sons Ltd J Barrette pour gill-box
DE2944681C2 (de) * 1979-11-06 1981-12-03 Staedtler & Uhl, 8540 Schwabach Anordnung zum Befestigen eines Nadelstreifens bei nadelstreifentragenden Maschinen
DE3336326A1 (de) * 1983-10-06 1985-04-18 Drei-S-Werk Präzisionswerkzeuge GmbH & Co Fertigungs-KG, 8540 Schwabach Nadelhalter mit nadelstreifen fuer textilmaschinen

Also Published As

Publication number Publication date
DE4211075C1 (enExample) 1993-07-15
EP0564987A1 (de) 1993-10-13

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