EP0270780B1 - Crochet pour machine à relier, machine à broder et analogue - Google Patents

Crochet pour machine à relier, machine à broder et analogue Download PDF

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Publication number
EP0270780B1
EP0270780B1 EP87115216A EP87115216A EP0270780B1 EP 0270780 B1 EP0270780 B1 EP 0270780B1 EP 87115216 A EP87115216 A EP 87115216A EP 87115216 A EP87115216 A EP 87115216A EP 0270780 B1 EP0270780 B1 EP 0270780B1
Authority
EP
European Patent Office
Prior art keywords
needle
tip
bearded
thread
symmetry
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.)
Expired - Lifetime
Application number
EP87115216A
Other languages
German (de)
English (en)
Other versions
EP0270780A2 (fr
EP0270780A3 (en
Inventor
Harry Vornholt
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.)
Groz Beckert KG
Original Assignee
Theodor Groz and Soehne and Ernst Beckert Nadelfabrik KG
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 Theodor Groz and Soehne and Ernst Beckert Nadelfabrik KG filed Critical Theodor Groz and Soehne and Ernst Beckert Nadelfabrik KG
Publication of EP0270780A2 publication Critical patent/EP0270780A2/fr
Publication of EP0270780A3 publication Critical patent/EP0270780A3/de
Application granted granted Critical
Publication of EP0270780B1 publication Critical patent/EP0270780B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B85/00—Needles
    • D05B85/006—Hooked needles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42B—PERMANENTLY ATTACHING TOGETHER SHEETS, QUIRES OR SIGNATURES OR PERMANENTLY ATTACHING OBJECTS THERETO
    • B42B2/00—Permanently attaching together sheets, quires or signatures by stitching with filamentary material, e.g. textile threads
    • B42B2/02—Machines for stitching with thread
    • B42B2/04—Machines for stitching with thread with straight needles
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B85/00—Needles
    • D05B85/04—Spring or bearded needles

Definitions

  • the invention relates to a hook eye needle for book binding machines, embroidery machines and the like., With a needle shaft, which is followed by a needle head via a neck part, which has a substantially conical needle tip and carries a tongue, which forms the hook eye together with the neck part the side facing the needle tip is delimited by a rounded throat.
  • Hook eye needles such as those used for pulling a thread loop through a work piece, for example the sheets of a book to be stitched together, are described in two common embodiments, for example in DE-C 642 703, where at the same time the function of a hook eye needle working with them is also described Bookbinding machine is briefly explained. Basically, these hook eye needles are used in such a way that they are pierced through the previously prepunched or unpunched work items until their tongues are exposed on one side and can catch a thread, which is then pulled through the work items in the form of a loop.
  • the object of the invention is therefore to remedy this and to create a hook eye needle which ensures extensive protection of the thread when the thread loop is pulled through the work item and thus also allows the processing of thread material of lower quality and the achievement of high working speeds.
  • the hook eye needle mentioned at the outset is characterized in that the needle head, starting at least in the area of the hook eye, is formed with two thread spaces lying on both sides of the longitudinal plane of symmetry of the needle and is tapered laterally over the needle tip and the conical needle tip in the area of the hook eye one throat has an upright, substantially rectangular cross-sectional shape with rounded or chamfered edges to the longitudinal plane of symmetry that cuts its narrow sides centrally.
  • This configuration of the needle head of the needle eye needle ensures optimal thread protection when pulling the thread loop through the work piece.
  • the two legs of the thread loop running on both sides of the throat are protected within the thread clearances, so that they are not pressed laterally against the material of the work material when the thread loop is pulled through and thus practically no frictional forces occur between the thread material and the work material.
  • the thread clearances are matched to the thickness of the thread material, so deep that the two legs of the thread loop laterally withdraw from the outline of the neck part or shaft of the needle forming the hole when piercing through the work piece, with the result that they pass through when the hook eye needle is withdrawn the hole in the work piece that is more widened in this area can be pulled through without hindrance.
  • the lateral taper of the needle head between the throat or the needle shaft and the end of the needle tip is at least a quarter of the needle shaft width or the needle shaft diameter on each side of the longitudinal symmetry plane. It has also proven to be advantageous if the needle head is tapered laterally concavely in the area of the throat of the hook eye. In order to give the needle tip greater stability, in particular when piercing hard work, it can be expedient be that the needle tip has a region extending from its end of substantially the same width. The end of the needle tip can then be designed as a cutting edge or cone tip lying in the longitudinal plane of symmetry of the needle.
  • the needle tip can be hollow ground laterally to form longitudinal thread guide grooves extending from the throat, whereby the guidance of the thread loop can be improved without unnecessarily further weakening the needle.
  • the neck part is tapered laterally, beginning in the area before the end of the tongue, towards the needle tip on both sides of the longitudinal plane of symmetry of the needle, and the lateral tapering of the needle head is connected as a second taper to this first lateral taper.
  • the required thread clearance is divided into two sections of the needle head and the needle neck one behind the other in the longitudinal direction of the needle, thus avoiding an abrupt taper in the needle head for various purposes.
  • the tapered neck part can have a substantially same width at least in sections in the area lying in front of the second taper, which is advantageous with regard to the stability of the needle.
  • the tongue is slightly bent at the end towards the neck part to prevent the thread loop from sliding out of the hook eye and to prevent skipped stitches and hooking into the work piece.
  • the adjustment to a predetermined hook eye opening is facilitated.
  • the known hook eye needle shown in FIGS. 1 - 4 and 9 for a comparative clarification of the invention corresponds approximately to the embodiment according to the figures 7, 8 of DE-PS 642 703, as it is used in a similar way on a large scale in practical use.
  • the hook eye needle has a needle shaft 1 of circular cross-sectional shape, which is formed with a clamping or screwing part (not shown in the drawing) and to which a needle head 3 is connected via a neck part 2 and which has an essentially conical needle tip 4, the point-shaped of which End, the actual "tip", labeled 5.
  • the needle head 3 carries a molded tongue 6 which, together with the top of the neck part 2, forms the hook eye 7, which is delimited by a rounded throat 8 on the side facing the needle tip 4.
  • the needle neck part 2 is arranged in a recessed manner with respect to the upper side of the needle shaft via a needle chest area 9, so that the upper edge of the tongue 6 is flush with the upper side of the needle shaft or is somewhat set back against it.
  • the underside of the needle shaft is just continuously formed over the neck part 2 up to the needle tip 4.
  • the end of the needle tongue 6 at 10 is inclined somewhat inwards towards the neck part 2; the opening width of the hook eye 7, which is otherwise essentially parallel-flanked, is also dimensioned such that the thread associated with this needle size can slide freely through the hook eye 7.
  • the tongue 6 is at its end also somewhat tapered laterally, but embodiments are also in use in which the tongue 6 tapers only slightly at the end, as is indicated by dash-dotted lines at 11. In its remaining course, the tongue 6 has essentially the same width as the neck part 2.
  • the needle head 3, starting at 12 in the region of the hook eye 7, is tapered on both sides of the longitudinal plane of symmetry of the needle indicated at 13 in FIG. 8, so that two thread spaces, which are designated by 14, are formed on both sides of the longitudinal plane of symmetry 13 .
  • the conical needle point 4 has in the region of the throat 8 of the hook eye the upright standing, essentially rectangular cross-sectional shape shown in the sectional view according to FIG. 6 with 15 rounded edges, the narrow sides 16 of which are cut centrally by the longitudinal plane of symmetry 13.
  • the lateral taper of the needle head 3 between the throat 8 and the end 5 of the needle tip 4 is on each side of the longitudinal plane of symmetry 13 at least a fourth of the needle shaft width, ie the diameter of the cylindrical needle shaft 1, the cross-sectional image of which is indicated at 17.
  • the Both of the lateral tapering of the needle head 3 mentioned have concave wall regions in the region of the throat 8 at 18, which then merge in the manner shown in FIG. 8 into a region 19 which extends from the end 5 of the needle tip 4 and has essentially the same width.
  • the end 5 of the needle tip 4 is designed as a cutting edge or cone tip lying in the longitudinal plane of symmetry 13 of the needle (cf. FIG. 5).
  • the needle tip 4 is laterally hollow ground to form longitudinally running thread guide grooves 20 starting from the throat 8, as can be seen from FIG.
  • the neck part 2 is in contrast to the embodiment according to FIGS. 1-4, starting in the area in front of the end 10 of the tongue 6, to the needle tip 4 on both sides of the longitudinal plane of symmetry 13 tapered laterally at 21, such that the so The first lateral taper formed connects the lateral taper already explained at 14 of the needle head 3 as a second taper.
  • the tapered neck portion has an essentially identical width in the region lying at 14 in front of the second taper (at least in sections) (FIG. 8).
  • the tongue 6 is slightly bent at the end at 22 with a section towards the neck part 2 in order to ensure that the thread is securely held in the hook eye 7.
  • a thread 23 is inserted into the hook eye 7 of the needle head 3 projecting over the work item 22, which thread is pulled out into an essentially U-shaped thread loop when the hook eye needle moves back, which thread is pulled through the work item 22.
  • FIGS. 9 and 10 the stresses on the thread 23 in the known hook eye needle shown in FIGS. 1 to 4 are fundamentally different from those for the hook eye needle according to the invention illustrated in FIGS. 5 to 8:
  • the thread 23 of the U-shaped thread loop is laterally squeezed at 24 between the edge of the pre-punched hole in the work piece 22 and the needle head 3 in the region of the throat 8, whereby it is partially forced to create the needle shaft 1 To expand the opening in the work item 22 locally.
  • the result of this is that the thread 23 is exposed to a high frictional stress when it is pulled through the work material 22, which leads to an excessive tensile stress on the thread loop in the region of the throat 8 and can damage or even break the thread.
  • the two legs of the thread loop when pulling through the pre-pierced opening of the work material 22 in the thread spaces 14 are in any case within the outline of the cylindrical needle shaft 1 shown in dash-dotted lines in FIG
  • the result of this is that the thread of the thread loop is not frictionally inhibited by the work good 22 when it is pulled through the work good 22, but is essentially pulled freely and unhindered through the pre-punched hole.
  • the tensile force exerted on the thread 23 in the area of the thread loop is essentially given exclusively by the thread tension specified by the thread delivery device and possibly a low resilient inherent elasticity of the hole edge in the work piece 22.
  • the needle head 3 with its rectangular cross-sectional shape is designed essentially in the manner of a flat web, which leaves the thread 23 with sufficient lateral freedom of movement in the thread spaces 14 lying on both sides.
  • the lateral taper at 21 of the neck part 2 can alternatively be omitted.
  • the width of the hook eye 7 corresponds approximately to the thickness of the thread 23 assigned to the respective needle size, wherein it is selected to be slightly larger in order to ensure a free thread flow.
  • the new hook eye needle shown is rotated by 90 ° about its axis after the thread loop has been pulled through the work piece, in order to enable the gripper to freely pass through the thread loop, as is generally necessary. Therefore, the thread guide grooves 20 are also aligned approximately axially parallel. However, embodiments are also conceivable in which the needle head 3 and the thread guide grooves 20 are twisted spirally in order to make it unnecessary in the manner explained in DE-PS 642 703 to turn the hook eye needle after it has been pulled through the work piece 22.
  • All edges and transitions in the thread guide area ie in the area of the hook eye 7, the throat 8 and the needle tip 4 are perfectly rounded, which also applies to the tongue 6.
  • the throat surface and all transitions in the area of the throat 8 are also highly polished and free of machining features, which has an advantageous effect on the thread flow and the needle stability.
  • the two guide grooves 20 result in a perfect entry into the throat 8, while at the same time ensuring a sufficiently large free space without unnecessarily weakening the needle.
  • the needle head 3 which is essentially rectangular in cross section, is rounded off at 15, as can be seen from FIG. 6. Alternatively, chamfers on the edges could also be provided.
  • the height of the needle head 3 (and the tongue 6) measured in the longitudinal symmetry plane 13 can, as can be seen from FIG. 10, be somewhat smaller than the diameter of the cylindrical needle shaft 1, i.e. be somewhat smaller than the maximum needle shaft height, with the result that the needle head 3 also passes through the work item 22 essentially unimpeded through the hole punched by the needle shaft 1.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Surgical Instruments (AREA)
  • Knitting Machines (AREA)

Claims (10)

  1. Aiguille à chas de crochet pour machines à relier, machines à broder et analogues, avec une tige d'aiguille (1) à laquelle se raccorde, par l'intermédiaire d'une partie de col (2), une tête d'aiguille (3) qui présente une pointe d'aiguille (4) sensiblement conique et qui porte une languette (6) qui forme conjointement avec la partie de col (2) le chas de crochet (7) qui est délimité, du côté tourné vers la pointe d'aiguille (4), par une gorge arrondie (8), caractérisée en ce que la tête d'aiguille (3), au moins à partir de la région du chas de crochet (7), est réalisée en se rétrécissant latéralement sans gradins en direction de la pointe d'aiguille (4), de sorte que sont formés deux espaces libres (14) pour le fil, qui sont situés de part et d'autre du plan de symétrie longitudinale (13) de l'aiguille, et la pointe d'aiguille conique (4) présente, dans la région de la gorge (8) du chas de crochet (7), une forme de section sensiblement rectangulaire avec des arêtes (15) arrondies ou biseautées, placée de chant symétrique par rapport au plan de symétrie longitudinale (13) qui coupe en leur milieu les côtés étroits (16) de cette pointe.
  2. Aiguille à chas de crochet selon la revendication 1, caractérisée en ce que le rétrécissement latéral (en 14) de la tête d'aiguille (3) entre la gorge (8) ou la tige d'aiguille (1) et l'extrémité (5) de la pointe d'aiguille (4), est égal, de chaque côté du plan de symétrie longitudinale (13), à au moins un quart de la largeur ou encore du diamètre de la tige d'aiguille.
  3. Aiguille à chas de crochet selon la revendication 1 ou 2, caractérisée en ce que la tête d'aiguille (3) est rétrécie latéralement de manière concave (en 18) dans la région de la gorge (8) du chas de crochet (7).
  4. Aiguille à chas de crochet selon l'une des revendications précédentes, caractérisée en ce que la pointe d'aiguille (4) présente une région (19), partant de son extrémité (5), de largeur sensiblement constante.
  5. Aiguille à chas de crochet selon la revendication 4, caractérisée en ce que l'extrémité (5) de la pointe d'aiguille (4) est réalisée sous la forme d'une lame ou d'une pointe de cône, situé dans le plan de symétrie longitudinale (13) de l'aiguille.
  6. Aiguille à chas de crochet selon l'une des revendications précédentes, caractérisée en ce que la pointe d'aiguille (4) est meulée en creux sur les côtés, de sorte que sont formées des rainures (20) de guidage du fil, qui s'étendent longitudinalement à partir de la gorge (8).
  7. Aiguille à chas de crochet selon l'une des revendications précédentes, caractérisée en ce que la partie de col (2), en partant de la région (21) située avant l'extrémité (10) de la languette (6), est rétrécie sur les côtés en direction de la pointe d'aiguille (4), de part et d'autre du plan de symétrie longitudinale (13), le rétrécissement latéral (en 14) de la tête d'aiguille (3) se raccordant comme deuxième rétrécissement à ce premier rétrécissement latéral.
  8. Aiguille à chas de crochet selon la revendication 7, caractérisée en ce que la partie de col rétrécie (2) présente, dans la région située avant le deuxième rétrécissement (en 14), une largeur sensiblement constante, au moins par tronçons.
  9. Aiguille à chas de crochet selon l'une des revendications précédentes, caractérisée en ce que la languette (6) est, du côté terminal, légèrement recourbée vers la partie de col (2).
  10. Aiguille à chas de crochet selon l'une des revendications précédentes, caractérisée en ce que la hauteur de la tête d'aiguille (3), mesurée dans le plan de symétrie longitudinale (13), est inférieure à la hauteur maximale de la tige d'aiguille.
EP87115216A 1986-12-13 1987-10-17 Crochet pour machine à relier, machine à broder et analogue Expired - Lifetime EP0270780B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3642693 1986-12-13
DE3642693A DE3642693C1 (de) 1986-12-13 1986-12-13 Hakennadel(auch Hakenroehrnadel)fuer Naeh-,Stick-,Heftmaschinen und dergl.

Publications (3)

Publication Number Publication Date
EP0270780A2 EP0270780A2 (fr) 1988-06-15
EP0270780A3 EP0270780A3 (en) 1988-09-28
EP0270780B1 true EP0270780B1 (fr) 1991-04-17

Family

ID=6316160

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115216A Expired - Lifetime EP0270780B1 (fr) 1986-12-13 1987-10-17 Crochet pour machine à relier, machine à broder et analogue

Country Status (5)

Country Link
US (1) US4790254A (fr)
EP (1) EP0270780B1 (fr)
JP (1) JPS63162290A (fr)
DE (2) DE3642693C1 (fr)
ES (1) ES2021674B3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5183063A (en) * 1991-06-10 1993-02-02 Larry Lee Ringle Dental floss and pre-threaded leader
IT1305535B1 (it) * 1998-09-18 2001-05-09 Ima Spa Ago perfezionato per collegare un sacchetto filtro,contenente unprodotto da infusione,ed una etichetta di presa con un filo
IT1305534B1 (it) 1998-09-18 2001-05-09 Ima Spa Macchina perfezionata per il confezionamento di sacchetti filtrocontenenti un prodotto da infusione provvisti di etichetta di presa
JP3962948B2 (ja) * 2002-02-28 2007-08-22 株式会社プロピア かつら製造用針
WO2006034042A2 (fr) * 2004-09-17 2006-03-30 Ormco Corporation Appareil de traitement medical et procede de fabrication d'une aiguille
JP4943767B2 (ja) 2006-08-10 2012-05-30 オルガン針株式会社 かぎ針
US20130184523A1 (en) * 2012-01-12 2013-07-18 Microline Surgical, Inc., Instrument tip having wire retention slot
JP6216556B2 (ja) 2013-07-10 2017-10-18 蛇の目ミシン工業株式会社 ミシンの糸通し装置およびミシン
US20150361602A1 (en) * 2014-06-13 2015-12-17 Consuelo Larsen Piercing Crochet Hook
US11624136B1 (en) 2017-05-26 2023-04-11 Feather W. King Serger seam hook for tucking thread tails

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE642703C (de) * 1936-02-26 1937-03-12 Brehmer Geb Hakennadel zum Durchziehen einer Fadenschleife durch ein Arbeitsstueck
US2633721A (en) * 1950-07-27 1953-04-07 Alfred Hofmann Needle Works In Spring beard needle and method of using same
US2872092A (en) * 1956-05-21 1959-02-03 Sehlow Fenton Readily threaded needle
US3834599A (en) * 1972-08-04 1974-09-10 N Herr Needle
JPS5045489A (fr) * 1973-08-23 1975-04-23
US3922982A (en) * 1974-02-04 1975-12-02 Cesare L Conti Eccentric-tip hooked needle for hosiery linking machines
JPS57187551A (en) * 1981-05-12 1982-11-18 Matsushita Electric Ind Co Ltd Apparatus for controlling temperature of water heater
US4379165A (en) * 1981-05-18 1983-04-05 Research Corporation Anti-convulsant
DE3447281A1 (de) * 1984-12-22 1986-06-26 Kemptener Maschinenfabrik Gmbh, 8960 Kempten Naehnadel fuer den einsatz an kettel- und naehkettelmaschinen

Also Published As

Publication number Publication date
JPS63162290A (ja) 1988-07-05
EP0270780A2 (fr) 1988-06-15
DE3769445D1 (de) 1991-05-23
EP0270780A3 (en) 1988-09-28
ES2021674B3 (es) 1991-11-16
DE3642693C1 (de) 1988-07-07
US4790254A (en) 1988-12-13

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