EP0038025B1 - Dispositif pour le réglage de la tension des fils de chaîne dans un métier à tisser - Google Patents

Dispositif pour le réglage de la tension des fils de chaîne dans un métier à tisser Download PDF

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Publication number
EP0038025B1
EP0038025B1 EP19810102675 EP81102675A EP0038025B1 EP 0038025 B1 EP0038025 B1 EP 0038025B1 EP 19810102675 EP19810102675 EP 19810102675 EP 81102675 A EP81102675 A EP 81102675A EP 0038025 B1 EP0038025 B1 EP 0038025B1
Authority
EP
European Patent Office
Prior art keywords
lever
tension
tension lever
support member
elongated hole
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
Application number
EP19810102675
Other languages
German (de)
English (en)
Other versions
EP0038025A2 (fr
EP0038025A3 (en
Inventor
Hajime Suzuki
Yoshifumi Umemura
Masahiko Kimbara
Noboru Kobayashi
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.)
Toyota Industries Corp
Original Assignee
Toyoda Jidoshokki Seisakusho KK
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
Priority claimed from JP4820980A external-priority patent/JPS56144256A/ja
Priority claimed from JP8418580A external-priority patent/JPS5711248A/ja
Application filed by Toyoda Jidoshokki Seisakusho KK filed Critical Toyoda Jidoshokki Seisakusho KK
Publication of EP0038025A2 publication Critical patent/EP0038025A2/fr
Publication of EP0038025A3 publication Critical patent/EP0038025A3/en
Application granted granted Critical
Publication of EP0038025B1 publication Critical patent/EP0038025B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/04—Control of the tension in warp or cloth
    • D03D49/12—Controlling warp tension by means other than let-off mechanisms

Definitions

  • the present invention relates to an apparatus for regulating the tension in the warp threads of a weaving machine
  • a tension lever swingably supported on said weaving machine and having a roller supported thereon for regulating the tension in said warp threads delivered from a warp beam, and passing over said roller
  • a weight lever swingably supported on said weaving machine and having a load at one end thereof
  • a link means operatively connected to said tension lever and said weight lever
  • a means for varying a lever ratio in the system between said weight lever and said tension lever said means comprising an elongated hole formed in said tension lever, to which one end of said link is connected by connecting means in such a manner that the connecting position is adjustable along said elongated hole.
  • the warp threads - sometimes simply designated as warps in this application - delivered from a warp beam are fed to heddles through a plurality of rollers, such as a back roller and a tension roller.
  • a tension lever type tension regulating apparatus has been commonly utilized.
  • the apparatus comprises a tension lever for supporting a tension roller, and a loading means, such as a weight or a spring, connected to said tension lever in order to create a desired tension in warps by displacing said tension roller.
  • such a conventional apparatus has a disadvantage in that the adjusting of the loading means based on the kind of warps or the type of the woven fabrics is troublesome. Accordingly, the weaving operation is often deteriorated because of unsatisfactory adjustment of the loading means, such as a weight or a spring. More specifically, if the tension in warps created by the loading means is small, the response of the regulating apparatus becomes slow. Contrary to this, if the tension in warps created by the loading means is large, the response of the regulating apparatus becomes excessively high and adversely affects the weaving operation.
  • FR-A-A21 43 169 discloses an apparatus of the general type indicated above.
  • This known apparatus allows for a satisfactory adjustment of the loading means.
  • the link means is not in the same vertical plane as the elongated hole but is somewhat distant from said plane. Therefore, when the securing means of the connection is loosened, the forces generated by the weight tend to twist a pin of the linkage means inserted through the elongated hole. Such torsional twisting, however, causes a deformation of both the elongated hole and the connecting pin. Morever, the adjustment due to the forces generated by the weight is troublesome and time- consuming, even though the loom had been stopped.
  • the object underlying the invention is to provide for an easy adjustment of the lever ratio by which the tension in warps can easily be adjusted in a wide range without changing the load of the loading means, while simultaneously avoiding detrimental deformation of the elongated hole and/or the connecting pin of the linkage means.
  • the link means to be adjusted relative to the tension lever can be secured in the same vertical plane, being occupied by the elongated vertical hole, a force applied at the connection between the lever and the link means by the weight causes no twist thereon, even if the securing member is loosened for the preparation of the adjustment.
  • smooth and easy adjustment can be obtained even when the loom is in operation.
  • Fig. 1 denotes a shaft of a warp beam which is rotatably supported on a machine frame 2 of a weaving machine and which detachably supports a warp beam 3 between the shaft 1 and the side of the machine frame 2 facing the shaft 1.
  • Reference numeral 4 denotes a speed change disposed on one side of the machine frame 2.
  • the speed change device 4 has: an input shaft 4a driven by a conventional drive shaft (not shown) of the weaving machine, via a toothed belt 5; and an output shaft 4b transmitting the output power which is obtained by changing the speed by means of the speed change 4.
  • the output shaft 4b has a pinion 6 attached thereto which engages with a spur gear 7.
  • a bevel gear 8 coaxial with the spur gear 7 engages with another bevel gear which is coaxial- with a worm 10 meshing with a worm wheel 11 attached to one end of the shaft 1 of the warp beam. Accordingly, the output power of the speed change device 4 is transmitted to the shaft of the warp beam through the pinion 6, the spur gear 7, the bevel gears 8 and 9, the worm 10 and the worm wheel 11.
  • the warp beam 3 is positively rotated in synchronization with the shedding operation of the weaving machine as the drive shaft rotates.
  • Reference numeral 12 denotes a back roller which is rotatably supported between the left ends of the machine frame 2 at a location above the warp beam 3 and which guides warps W delivered from the warp beam 3.
  • a pair of tension levers 26 (one of which is illustrated in fig. 1) are swingably supported on a shaft 15 located at the upper portion of a machine frame 2 and support a tension roller 16 therebetween by means of a shaft 27.
  • Each tension lever 26 has an elongated hole 26a formed therein and extending in a vertical plane passing through said tension lever.
  • An intermediate lever 13 is located beneath the tension lever 26 and is swingably supported by means of a shaft 29.
  • the lower end of an adjusting link 28 is swingably connected to the left end of the intermediate lever 13 by means of a connecting pin 30.
  • the upper end of the adjusting link 28 is connected to the tension lever 26 through connecting means 32, 37, 38 which will be described in more detail below.
  • warps W delivered inclinedly and upward from the warp beam 3 through the back roller 12 are fed to heddles (not shown) through the tension roller 16.
  • the change in tensions in warps is detected by the tilting movement of the intermediate lever caused by the vertical movement of the tension roller 16.
  • Reference numeral 17 denotes a weight lever swingably supported on the machine frame 2 by means of a shaft 18.
  • the weight lever 17 has a pin 17b secured to the left end thereof which serves to hang down a hanging hook 19 with balance weights 20 or to connect a tension spring 20' which is illustrated by a dot and dash line in fig. 1.
  • a connecting rod 21 has the upper end thereof connected to the right end of the intermediate lever 13; and a connecting pin 23 at the lower end thereof for connecting it to the portion adjacent to the right end of the weight lever 17.
  • a speed change lever 24 connected to a speed change shaft 4c of the speed change device 24 is connected to the weight lever 17 by way of a synchronizing link 25, so that the reduction ratio of the speed change device 4 is varied in accordance with the tilting movement of the weight lever 17 caused by the change in tension in warps, and so that the rotational speed during unwinding operation of the warm beam 3 is controlled in order to maintain an adequate tension in warps regardless of the change in tension.
  • Reference numeral 32 denotes a support member supported on the top of an adjusting link 28 via a universal joint 38 (Fig. 3). As illustrated in Fig. 2, the support member 32 has: an engaging surface 32a formed on the upper surface thereof and facing the lower side of the tension lever 26; and two pairs of rollers 33 and 34 rotatable along the lower surface of the tension lever in a direction of the elongated hole 26a, one pair is at the right and the other pair is at the left of the adjusting link in Fig. 2.
  • Reference numeral 35 denotes an index formed in a triangular prism shape and inserted into the elongated hole 26a as illustrated in Fig. 4 so that it corresponds to the graduations 36 formed on the tension lever 26.
  • Reference numeral 37 illustrated in Figs. 2 through 4 denotes a securing member formed in a hexagonal prism and having a bulged portion 37a and a male thread portion 37b.
  • the securing member 37 also serves as a handle during the adjusting operation.
  • the male thread portion 37b of the securing member 37 passes through the elongated hole 26a formed in the tension lever 26 and meshes with a female thread formed on the engaging surface 32a, so that the bulged portion 37a is in abutment with the upper surface of the tension lever 26, and so that the tension lever 26 is securely sandwiched between the bulged portion 37a and the support member 32.
  • the rollers 33 turn along the lower surface of the tension lever 26 so that the support member 32 is smoothly moved in a direction the same as that designated by the arrow A. Based on the indication between the index 35 and the graduations 36, the movement of the support member 32 is stopped at an appropriate position, and then, the securing member is tightened in a manner as explained above.
  • the apparatus for regulating tension in warps constructed in such a manner as explained above operates as follows.
  • the lever ratio 1 3 :1 4 of the tension lever 26 is minimum.
  • the connecting pin 23 of the connecting rod 21 is located at position A far from the shaft 18 the lever ratio 1 1 :1 2 of the weight lever is also minimum.
  • the location of the securing member 37 is moved along the elongated hole 26a to the far end thereof while the weight 20 or the spring 20' is maintained constant, the moment exerted on the tension lever 26 caused by the weight 20 through the weight lever 17 and the adjusting link 28 is increased due to the change of the lever ratio of the tension lever.
  • the tension in warps W is increased.
  • the adjusting link 28 which is capable of adjustment of the lever ratio of the tension lever 26, is disposed between the tension lever 26 and the intermediate lever 13, the tension T in warps can stably be adjusted in a wide range compared with the conventional apparatus for regulating tension in a warps while the weight 20 is unchanged.
  • the tension in warps can easily be adjusted by a simple operation wherein the position of the adjusting link 28 is varied.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (6)

1. Appareil à réguler la tension des fils de chaîne d'une machine à tisser comprenant;
un levier tendeur fixé de manière à pouvoir osciller à cette machine à tisser et supportant un galet de régulation de la tension des fils de chaîne provenant d'une barre à ourdir et passant sur ce galet:
un levier porte-poids fixé de façon à pouvoir osciller à la machine à tisser et portant un poids à une extrémité;
un dispositif d'articulation fonctionnellement relié au levier tendeur et au levier porte-poids;
et un dispositif permettant de faire varier le rapport des leviers d'un système comprenant le levier porte-poids et le levier tendeur, ce dispositif comprenant un orifice allongé formé dans le levier tendeur, auquel une extrémité du dispositif d'articulation est reliée par un dispositif de fixation de manière que la position de fixation soit réglable le long de l'orifice allongé, caractérisé par le fait que l'orifice allongé (26a) du levier tendeur (26) est orienté dans un plan vertical passant par le levier tendeur (26), par le fait que le dispositif d'articulation (37) traverse l'orifice allongé (26a) de façon que le dispositif d'articulation (37) se situe dans ce plan et que le levier (26) soit supporté par le dispositif d'articulation (28) par le dessous.
2. Appareil selon la revendication 1, caractérisé par le fait qu'il comprend en outre un galet du guidage (33, 34) disposé dans la position où le dispositif d'articulation (28) est relié au levier tendeur (26) qui sert de guide au mouvement relatif entre le dispositif d'articulation (28) et le levier tendeur (26) pendant l'opération de changement du rapport des leviers.
3. Appareil selon la revendication 1, caractérisé par le fait qu'il comprend en outre un support (32) soutenu à l'extrémité supérieure du dispositif d'articulation (28) et supportant le galet de guidage (33, 34) qui vient en contact coulissant avec le levier tendeur (26) et par le fait que le dispositif d'articulation comprend une pièce de fixation (37) vissée sur ce support (32) à travers l'orifice allongé (26a) formé dans le levier tendeur (26) pour fixer le support (32) en un endroit prédéterminé par rapport au levier tendeur (26).
4. Appareil selon la revendication 3, caractérisé par le fait que le support (32) pivote à l'extrémité supérieure du dispositif d'articulation (28) et par le fait que le dispositif à galets de guidage comprend au moins deux galets (33, 34) qui sont placés sur les côtés opposés d'un joint pivotant (38) entre le support (32) et le dispositif d'articulation (28).
5. Appareil selon les revendications 3 et 4, caractérisé par le fait que le levier tendeur (26) et le support (32) sont fixés l'un à l'autre au moyen d'une pièce de fixation (37), par le fait que le support (32) a une surface d'engagement qui est engagée à force avec le levier tendeur (26) de façon que les galets (33, 34) placés des deux côtés de cette surface d'engagement soient séparés du levier tendeur.
6. Appareil selon la revendication 4, caractérisé par le fait que le pièce de fixation (37) sert aussi de poignée de réglage pour le déplacement des galets de guidage (33, 34) en même temps que le dispositif support (32) par rapport au levier tendeur (26).
EP19810102675 1980-04-12 1981-04-09 Dispositif pour le réglage de la tension des fils de chaîne dans un métier à tisser Expired EP0038025B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP4820980A JPS56144256A (en) 1980-04-12 1980-04-12 Apparatus for adjusting tension of warp yarn in loom
JP48209/80 1980-04-12
JP8418580A JPS5711248A (en) 1980-06-20 1980-06-20 Apparatus for adjusting warp yarn tension in loom
JP84185/80 1980-06-20

Publications (3)

Publication Number Publication Date
EP0038025A2 EP0038025A2 (fr) 1981-10-21
EP0038025A3 EP0038025A3 (en) 1982-02-17
EP0038025B1 true EP0038025B1 (fr) 1985-07-31

Family

ID=26388444

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810102675 Expired EP0038025B1 (fr) 1980-04-12 1981-04-09 Dispositif pour le réglage de la tension des fils de chaîne dans un métier à tisser

Country Status (3)

Country Link
EP (1) EP0038025B1 (fr)
CS (1) CS244410B2 (fr)
DE (1) DE3171545D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2534202Y2 (ja) * 1991-12-13 1997-04-30 株式会社豊田自動織機製作所 織機における経糸張力検出装置
CN102953209B (zh) * 2011-08-30 2013-10-30 苏州迪盛织造整理有限公司 控制隐条记忆面料机械性隐档的装置
CN102808274A (zh) * 2012-08-20 2012-12-05 江苏万工科技集团有限公司 一种带重块的电子送经装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE426467C (de) * 1924-12-09 1926-03-11 Ludwig Puskas Kettenbaumregulator fuer Webstuehle
ES404069A1 (es) * 1971-06-21 1975-05-16 Somet Soc Mec Tessile Sistema regulador para telares de tejer.
FR2463216A1 (fr) * 1979-08-07 1981-02-20 Alsacienne Constr Meca Dispositif de regulation de la tension d'une nappe de fils de chaine dans un metier a tisser

Also Published As

Publication number Publication date
DE3171545D1 (en) 1985-09-05
CS244410B2 (en) 1986-07-17
EP0038025A2 (fr) 1981-10-21
CS272081A2 (en) 1985-09-17
EP0038025A3 (en) 1982-02-17

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