EP0540760A1 - Support de bobine - Google Patents

Support de bobine Download PDF

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Publication number
EP0540760A1
EP0540760A1 EP92910581A EP92910581A EP0540760A1 EP 0540760 A1 EP0540760 A1 EP 0540760A1 EP 92910581 A EP92910581 A EP 92910581A EP 92910581 A EP92910581 A EP 92910581A EP 0540760 A1 EP0540760 A1 EP 0540760A1
Authority
EP
European Patent Office
Prior art keywords
bobbin
roving
torque
circular annular
bearing
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.)
Granted
Application number
EP92910581A
Other languages
German (de)
English (en)
Other versions
EP0540760A4 (en
EP0540760B1 (fr
Inventor
Zenzaburo 4-5 Furuedai 2-Chome Tsukumo
Shinsuke 4-5 Furuedai 2-Chome Tsukumo
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.)
ZenGiken Co Ltd
Original Assignee
ZenGiken Co Ltd
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 ZenGiken Co Ltd filed Critical ZenGiken Co Ltd
Publication of EP0540760A1 publication Critical patent/EP0540760A1/fr
Publication of EP0540760A4 publication Critical patent/EP0540760A4/en
Application granted granted Critical
Publication of EP0540760B1 publication Critical patent/EP0540760B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/18—Supports for supply packages
    • D01H1/183—Overhead suspension devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/16—Braked elements rotated by material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a bobbin holder. More particularly, it relates to a bobbin holder which is a principal functional part indispensable for roving and spinning processes in a spinning factory.
  • a conventional bobbin holder is of the structure wherein a rolling contact bearing structure portion of which the bearing itself is adapted to have a rotating-resistant value of substantially 0 is disposed axially of the bobbine holder; and a "braking mechanism", adapted to make a brake shoe 7Bd (see Fig. 7) to press against a rotating part by means of a coiled spring 3Bp separately provided, is provided with the bearing portion. Accordingly, unless the pressing force by the coiled spring is changed, the braking-torque b ⁇ k on the bearing side is substantially constant, where b is produced by multiplying the pressing force by a friction coefficient ⁇ ; k is the distance from the rotation center of the rotation part to the point of action of frictional force.
  • the roving withdrawing-tension T f with a full bobbin (radius R f ) is set at 2.0g.
  • the roving withdrawing-tension T o with the empty bobbin (radius R o ) amounts really up to 6 to 12g., which exposes a defect of going far out of the optimum allowance (3.0 ⁇ 1g.) according to spinning technology.
  • the main object of the present invention is to realize a novel bearing structure provided with a function capable of meeting above-mentioned technical requirement and put it to practical use, and to establish a comprehensive and rational system related to production or assembly, adjustment, maintenance, protection and the like.
  • a so-called “thrust bearing method based on sliding-contact” according to the present invention is based on a property such that the "rotational friction torque B ⁇ K'' varies in proportion with an increase or decrease in a load P of rotating part (hereinafter referred to as "roving bobbin weight"), which load consists mainly of the weight of a roving bobbin varying in proportion to the radius R of the roving bobbin.
  • the sliding-contact thrust bearing possesses novel features while utilizing the related arts disclosed in Japanese Patents Nos. 996924 and 995381, Japanese Patent Application No. 162304/1984 and the like which are associated with the present invention.
  • the method has been intensively developed as a highly innovative art.
  • a bobbin holder comprising a rotatable portion which is rotated by a bobbin-rotating-torque T ⁇ R varying in proportion with variation in the radius of a roving bobbin as the roving is withdrawn from the roving bobbin while suspending the roving bobbin (refer to Fig.
  • the suspending mechanism comprises a pivot member having a partially conical step portion formed at least in either of the rotatable portion and the fixing portion, and an engaging bore formed in the other of the two for engaging with the partially conical step portion to support the weight P of the rotatable portion (roving bobbin weight) so as to generate a frictional force proportional to the roving bobbin weight P in cooperation with the partially conical step portion, thereby generating a braking-torque B ⁇ K working on the rotatable portion and varying in proportion with an increase or decrease in the roving bobbin weight P proportional to the radius R of the roving bobbin, the bobbin-rotating torque T ⁇ R being well-balanced with the braking-torque B ⁇ K such that a roving withdrawing-
  • the bobbin holder of the present invention is so arranged that at least a portion of a member constituting the periphery of the engaging bore is made appropriately replaceable so as to enable to alter the bore of the engaging bore as far as the pivot member is engageable therewith and/or in a coefficient of friction of the member constituting the periphery of the engaging bore, whereby the braking-torque B ⁇ K can be variably adjusted.
  • a "selective combination (or recombination) mating system” based on an originally-devised semi-cylindrical bearing member which is formed of, a bisected and molded half so that the bore-diameter of the bearing (engaging bore) can be properly altered as far as the pivot member can be engaged therewith, while at the same time the coefficient of friction can be properly selected, whereby a bearing arrangement capable of setting stepwise the braking-torque B ⁇ K of the sliding-contact bearing to a desired level is completed.
  • the roving withdrawing-tension T can be set specific and constant.
  • a bearing bore-diameter d1 is to be determined for basically setting a roving withdrawing-tension T11 on the basis of this graph, a line T11-C11 is drawn parallel to the X-axis from T11, and a point of intersection C11 of the line T11-C11 with an oblique line OB1 representing a friction coefficient initially selected is orthogonally projected on the X-axis to find the bearing bore-diameter d1.
  • a line segment d1-c11 is extended to give a line segment d1-c12, and a point of intersection c12 of the line segment d1-c12 with an oblique line OB2 is orthogonally projected on the Y-axis to find a point T12 which is a roving withdrawing-tension T12 resulting from the fine adjustment.
  • Other adjustments are achieved likewise.
  • a space large enough is formed in the periphery of the bearing member, and an originally-devised dustproof band area composed of rotatable and concentrically partitioned spaces is provided in the space for assuredly protecting the bearing function for a long period (10 years or more).
  • a circular annular space with the suspending mechanism assuming the axis thereof, which space comprises an upper circular annular groove formed in a top of an inner wall of the fixing portion of the bobbin holder and a lower circular annular groove formed in a top end of the rotatable portion, which grooves face vertically opposite to each other in a substantially symmetrical relation; and put freely in the circular annular space and on the bottom of the lower circular annular groove is a dustproof cylinder substantially isolating the suspending mechanism from the outside of the bobbin holder, both upper and lower portions of which ring are overlapped remaining a clearance with the above-mentioned two grooves.
  • the dustproof ring completely embraces the suspending mechanism while concentrically partitioning the circular annular space into a plurality of spaces.
  • this structure possesses an outstanding dustproof effect based on an active dust-collecting phenomenon by interwinding of fly going toward the bearing portion; that is, for example, shown in Fig. 2, fly and dust coming into a peripheral space a gathers other fly to form matted and ball-like-shaped matters having a dust-collecting-effect while a suspended rotor 2A rotates slowly, and most of the ball-like-shaped matters remain in the chamber a with the help of a thin cylinder 401, and the same dust collecting phenomenon as the above also behaves in next spaces b1 and b2.
  • a coiled spring 402 can be mounted in the space to incorporate a braking mechanism for a special purpose into the arrangement of the invention (refer to Fig. 2).
  • the upper and lower parallel faces are adaped to effectively serves as friction faces.
  • connecting means allowing easy doffing and donning and capable of remarkably improving the durability and close fitting property of the connecting portion.
  • the rotatable portion of the bobbin holder comprises a suspended body for suspending the bobbin, which suspened rotor has a cylindrical chamber opened in a top end thereof, a substantially cylindrical block fitted into the cylindrical chamber, a circular annular recess, substantially rectangular in section, of which three sides are formed of a slope formed on the entire outer circumference of the block at the upper edge thereof and a groove of V-shaped section formed on the entire inner circumference of the cylindrical chamber at a location corresponding to the slope, and a C-shaped snap ring resiliently closely fitted into the circular annular recess, whereby the weight of the rotatable portion is uniformly dispersed over the entire circumference of the C-shaped snap ring, while the three parts (the suspended rotor, the block and the C-shaped snap ring) are integrated using the weight of the rotatable portion extremelyly to make the connection secured and close.
  • an upper structure 1A comprises an assembled construction wherein a bolt 30 and a thrust bearing (hereinafter referred to as "pivot") 606 are made separate and independent according to a new idea, and coaxially and jointedly housed in a coupler (hereinafter referred to as "pivot housing") 101 comprising an original bearing member composed of bisected and molded halves.
  • the pivot housing 101 is formed by mating two bisected cylindrical and molded members obtained by splitting a cylindrical member along the axis thereof.
  • an upper chamber 11G and an intermediate chamber 10G are coaxially and serially formed.
  • the upper chamber 11G accommodates a bolt head 31 fixedly
  • the intermediate chamber 10G accomodates rotatably and pivotally the upper end of the pivot 606, or the pivot head 61 shaped to have a conical or a similarly curved surface, whereby a bolt 3A and the pivot 606 are coaxially jointed with each other with intervention of the pivot housing 101.
  • the pivot housing 101 is pressed from below to fit into a top cap 102 along the axis y-y of the top cap 102, and further, the top cap 102 and the pivot housing 101 are fastened by means of a bolt 30, a washer 33 and a nut 32 to integratedly form the upper structure 1A.
  • a lower chamber 12G which is digged in the center of a block 201 disposed on the top of a suspended rotor 2A, accommodates an enlarged bottom base 62 of the pivot 606 along a small window 20H opening extending upwardly and coaxially with the axis y-y.
  • the block 201 defining the lower chamber 12G can be of the monolithic type or the bisected type, the latter is preferable in view of superior effectiveness and convenience in function, molding and assembling.
  • the top end face of the lower chamber 12G can be made substantially conical for allowing pivotal movement thereat.
  • the bearing structure wherein the lower chamber 12G is made similar in shape to the intermediate chamber 10G; the chambers 12G, 10G share the pivot 606 of which opposite ends are made similar each other in shape; and two rotatable and slidable portions are coaxially disposed one above the other, is optimal for use as the bearing in the bobbin holder BH. That is because either smaller one in generated frictional force of the two rotatable and slidable portions, slides and rotates, and if there occures an increase in the frictional force exerting on the sliding and rotating portion by some reason, the other portion begins to slide and rotate in compensation for the former, thereby maintaining the braking-torque constant.
  • Fig. 5 shows an embodiment of an original arrangement for fixedly and closely integrating a predetermined portion of a cylinder 22 formed in the top portion of the suspended rotor 2A with the block 201 fitted into the cylinder 22 from above.
  • a conical face G1 formed on the shoulder of the block 201 and a V-shaped groove 22G formed in the inner wall of the cylinder 22 so as to cross the axis y-y at right angles cooperate to share the lower edge portion G2 thereof and form an annular recess 22U having a rectangular section (formed of three faces G1, G3 and G4) of which the bottom face G3 is made to have a width equivalent to the diameter d S of a wire forming a C-shaped snap ring 202 (refer to Fig.
  • the C-shaped snap ring 202 originally formed of the wire having the diameter d S has a free outer diameter D c (outer diameter in unforced condition) and is fitted into the annular recess 22U along the inner wall of the cylinder while being bent so as to reduce the free outer diameter D c , whereby a structure wherein the cylinder 22, the block 201 and the C-shaped snap ring 202 are closely integrated each other can be implemented with well-balancing in terms of vectors of the internal force working on the three orthogonally crossed circumferential faces including the two circumferential slopes G1 and G4 of the annular recess 22U and the bottom circumferential face G3 according to statics principle.
  • the outer diameter D S of the C-shaped snap ring 202 when fitted into the annular recess 22U is substantially the sum of the inner diameter D H of the cylinder 22 and the wire diameter of the C-shaped snap ring d S and made the same or smaller than the free diameter D c , or D c ⁇ D S ⁇ D H + d S .
  • Fig. 6 is a sectional view illustrating a vector distribution of the force derived from the roving bobbin weight P and exerting on the pressure-contacted circumferential faces G1, G3 and G4 shown in Fig. 5. Specifically, it shows a well-balanced distribution of vector F derived from the roving bobbin weight P in terms of orthogonal coordinate system X-Y passing through the three pressure-contact points P1, P2 and P3 with the center O of the cross section of the wire forming the C-shaped snap ring 202 assumed as the original.
  • Another internal force F o working on the point O which is derived from the restoring force of the C-shaped snap ring 202 causes the ring 202 to be assuredly closely fitted into the annular recess 22U and will not permit it to come out of the recess 22U even when the roving bobbin weight P of roving is not imposed.
  • Fig. 2 shows an embodiment of an originally-arranged dustproof structure in the present invention which exhibits a high effect of preventing entrance of fly and dust toward the bearing.
  • the inner top end face of the top cap 102 and the top end face of the suspended rotor 2A face opposite and parallel to each other horizontally.
  • the two faces are formed with upper and lower circular annular grooves 102M and 201M with the axis y-y assuming a center thereof, respectively.
  • the two circular annular grooves 102M and 201M are disposed substantially vertically symmetric so as to define a space around the bearing portion with the pivot 606 assumed as an axis.
  • a thin cylinder 401 having a predetermined height for remaining a gap between a top end of the cylinder 401 and a ceiling of the upper circular annular groove 102M.
  • the upper and lower portions of the cylinder 401 are overlapped remaining a clearance with the upper and lower circular annular grooves 102M and 201M, respectively.
  • the circumferental wall of the thin cylinder 401 slowly rotating in the space around the pivot 606 and the un-rotating wall (inner wall of the top cap 102) facing opposite thereto define concentrically partitioned dustproof spaces a , b1, b2 and c which causes the fly to interwind.
  • the dustproof spaces form an annular dustproof band area which encloses the bearing structure and actively prevents from and cuts off the ambient atmosphere with well-utilizing the interwinding phenomenon of the fly.
  • the functional innovation of the bearing portion in the bobbin holder of the present invention remarkably contributes to improvement in a bobbin holder itself. That is, it has been verified that dispersion of the roving withdrawing-tension T in a spindle or between spindles is stably confined to the range of ⁇ 0.5g with respect to a specific standard value for a long period (semipermanently according to practical experiments). Particularly, it is worth noting the results of the invention such that has been realized a safe, sure and stable feeding of extra relaxedly twisted roving and extra fine roving which has heretofore been considered to be practically impossible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Unwinding Of Filamentary Materials (AREA)
  • Sliding-Contact Bearings (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)

Abstract

Support de bobine dont la structure est telle que la force de tension de la mèche peut être maintenue constante à l'aide d'un système de pallier à glissement, le couple d'entraînement en rotation de la bobine requis pour tirer la mèche et la charge de la bobine de mèche étant proportionnels au rayon de la bobine de mèche, de sorte que le couple de freinage (qui équilibre le couple d'entraînement en rotation de la bobine) devant agir sur la bobine peut être produit par une force de frottement sur la base du poids de la bobine de mèche et que ledit couple de freinage peut être réglé de façon variable en fonction du diamètre du trou dudit palier et (ou) du coefficient de frottement modifiés à des fins de combinaison. Les principaux éléments de la bobine présentée sont: une ouverture étroite (10H) servant de trou de support d'un logement de pivot (101), ménagée dans la partie fixe du support de bobine (BH), et un pivot (606) formant un arbre destiné à soutenir le poids de la partie rotative comprenant une bobine de mèche (Rb) et entourant ladite ouverture étroite (10H) dans laquelle le logement de pivot (101) se trouve sous la forme, par exemple, d'un cylindre divisé en deux segments égaux dont chacun peut être changé à des fins de combinaison.
EP92910581A 1991-05-21 1992-05-20 Support de bobine Expired - Lifetime EP0540760B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP145353/91 1991-05-21
JP3145353A JP2545004B2 (ja) 1991-05-21 1991-05-21 ボビン・ホルダ―に於けるスラスト軸受構成
PCT/JP1992/000667 WO1992020845A1 (fr) 1991-05-21 1992-05-20 Support de bobine

Publications (3)

Publication Number Publication Date
EP0540760A1 true EP0540760A1 (fr) 1993-05-12
EP0540760A4 EP0540760A4 (en) 1993-10-13
EP0540760B1 EP0540760B1 (fr) 1996-09-11

Family

ID=15383235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92910581A Expired - Lifetime EP0540760B1 (fr) 1991-05-21 1992-05-20 Support de bobine

Country Status (5)

Country Link
EP (1) EP0540760B1 (fr)
JP (1) JP2545004B2 (fr)
DE (1) DE69213652T2 (fr)
HK (1) HK40397A (fr)
WO (1) WO1992020845A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2338217A1 (fr) * 1976-01-17 1977-08-12 Ntn Toyo Bearing Co Ltd Dispositif de suspension de bobines pour metiers a filer
EP0081585A1 (fr) * 1981-06-16 1983-06-22 TSUKUMO, Zenzaburo Support de bobine
JPH05155434A (ja) * 1991-12-09 1993-06-22 Funai Electric Co Ltd 物品移送装置におけるプッシャ装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5429625B2 (fr) * 1973-08-23 1979-09-25
JPS5111923A (ja) * 1974-07-18 1976-01-30 Zenzaburo Tsukumo Suichokukengasochi
JPS5155434A (fr) * 1974-11-09 1976-05-15 Toyo Bearing Mfg Co
JPS5349863U (fr) * 1976-09-30 1978-04-27
JPS60148870A (ja) * 1984-07-31 1985-08-06 Zenzaburo Tsukumo ボビンホルダ−に於ける軸受構造

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2338217A1 (fr) * 1976-01-17 1977-08-12 Ntn Toyo Bearing Co Ltd Dispositif de suspension de bobines pour metiers a filer
EP0081585A1 (fr) * 1981-06-16 1983-06-22 TSUKUMO, Zenzaburo Support de bobine
JPH05155434A (ja) * 1991-12-09 1993-06-22 Funai Electric Co Ltd 物品移送装置におけるプッシャ装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9220845A1 *

Also Published As

Publication number Publication date
EP0540760A4 (en) 1993-10-13
HK40397A (en) 1997-04-11
JP2545004B2 (ja) 1996-10-16
JPH04343719A (ja) 1992-11-30
DE69213652D1 (de) 1996-10-17
DE69213652T2 (de) 1997-02-13
WO1992020845A1 (fr) 1992-11-26
EP0540760B1 (fr) 1996-09-11

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