US2638939A - Weaving loom cloth beam support - Google Patents

Description

May 19, 1953 I J. PICANOL 2,638,939

WEAVING LOOM 0101's BEAM SUPPORT Filed Sept. 27, 1951 5 Sheets-Sheet 1 air/w ic 120! M rakzvzys May 19, 1953 J. PICANOL I WEAVING LOOM CLOTH BEAM SUPPORT 5 Sheets-Sheet 2 Filed Sept. 27, 1951 kw AV/// r/////// TORIVf/S May 19, 1953 J. PICANOL WEAVING LOOM CLOTH BEAM SUPPORT 5 Sheets-Sheet 3 Filed Sept, 27, 1951 M/Vf (h Pic May 19,1953 J. IICANOL WEAVING LOOM CLOTH BEAM SUPPORT Filed Spt. 27, 1951 5 Sheets-Sheet 4 May 19, 1953 J. PICANOL 2,638,939

WEAVING LOOM CLOTH BEAM SUPPORT v Filed Sept. 27, 1951 1 5 Sheets-Sheet 5 m fgvra/r Jamze Pwa/wl Patented May 19, 1953 Jaime Pica-n01,- Zandberg, Zillebehe-lez-Ypres,.-

Belgium- Application September 27, 1951 Serial No 248,610"

InBelgii-tm April 23 1951 ES-Claims ('Cl. 139-408) The present iiiventionirela-tes to weaving looms and more particularly to the cloth: beam support means; The cloth beam is" normally carried by support movable vertically or substantially ver tically; generally through the intervention of rack devices.-

These: supports involve a. problem which, although: not, influencing the weaving; technique or the qualities of the loom itself, raises'an-economic question which is of considerableeinterest. If we consider that the cloth beams can attain a diameter up to 500- mm. and that such: diam-- etersare more and more frequent due to sub-- sequent requirements in: the finishing, printing and other operations-,. if we also consider that these beams must be'moved into the alleys which separate the rows of weaving looms, it will be found necessary to provide said alleys with a free.- passage of 60.0- mm. minimum width. However, the present known supports of the clothbeams are so designed as to permit only aprogressive vertical lowering of said beams and-consequently these into the alleys as their diameter increases; 'the distancebetween twoloomsin the same row must,- therefore, be 7 substantially greater than said minimum of 600mm.- as thelarge space occupied by the two beams disposed infront of each other must be allowed for.

means for diminishing this space order to increase considerablythe number of looms in a room of a given surface. If v we consider,- for beams protrude more and more I It is important to provide instance-,. a room of- 900 looms; with 30 rows-0t 30- looms each, it will be easy to by gaining 150 mm. per loom, about 15% of the occupied floor space will. be savedand consequently it will be possible ta increase by 15% the: number of looms in the same weaving room,- withoutchangina the workingspace for the-operators. This: reduction of the space occupied by the cloth beams is relatively considerable.

- The object ofthe invention is a new device permitting the reduction. of the space occupied by the cloth beams at. leastthe proportions indicated, without affectingin. any way thesaiety conditions. during the winding ofthe cloth" and the facilities. to remove therolls and to proceed with the various operations which are customary.

The device object of the invention is essentially characterised by the provision of at least two curved racks or toothed sectors which are guided in slides, fixed at both sides of the loom, each racls meshing with a tooth-ed pinion fixed on a common axle, surrounded by'coil springs; a helical gear is freely mounted on said axle and meshes with a worm, the shaft of which is provide'd with a handwheel'; said c'oils'pringjs extend on both sides of said helical gear" and are, at one extremity, secured to said axle and, semen understand that, v

i 2 other extremity, secured to the hub-:ofsaid helical gear. 'Ehe shattof thev beam on which: the cloth ig-v wound-bears at its two extremities on bearing bushes: disposed at the" upper end oi theraoks.

The; racks: are held by the toothed pinions, which: are inturn: held by the-coil springs. When the diameter and-- therefore the weight oi the cloth beam increases, the force exerted on the racksv increases and. provokesthe rotation,- ot the toothed pinions and. theprogressive tension, of the springs. From this it results that theelastic reaction of these springs increases with the increasing weight of the cloth beams a practically constant counterbalance: is main-,- tained. the initial pressure being m-aintained be tween the cloth beam and the, driving beam. When-the cloth beam? has reached its: final. diameter, the stresses exerted by: the springs on the rac-kszare reduced tozzeroeby operating the handwheel which causes the: rotationof' the helical wheel and of its hub g upon turning, the latter releasesthe tension of the-springs- I This mechanism. is, extremely simple; and has also the. advantage of; allowing, at any time,. ad iu-stment of the tension of the springs, that is, adjustment of the force which isopposed to the fall of the racks under the. weight of thecloth beam,

It is possible to vary the form and shape of the different elements which have been described and-which characterise 1 essentially the support of; the invention, to suit any particular type of looml For illustration only and without any limitative character, an embodiment is described hereafter with reference to the. annexoddrawings, which:

Figures 1 and .2 are schematic end elevations of weaving looms showing the space occupied by the: cloth beams,v when carried respectively by the known supports and by the device according to the present invention Figures- 3 and 4 are schematic lateral and. front elevations of the essential elements of, the/device.

according. to. the present invention;

Figures 5 and 6 represent, respectively side and front elevations ot a preferred embodiment.

The. device, according to.- the present invention, comprisesat least two racks L12 in the form; of. a circular arc, the. convex part ofv which is toothed. These racks, are guided into their re spective slide 3,v 4 which have a u-shaped crosssection and which are rigidly secured to the respective side-framesv 5, 6 of the loom by the respective pairs ofbraces 1,8 and 9, l0, and, by bolts H, [2, 13', m respectively. The racks form, at their upper ends, cradles 15, I6 respec= oven, for removabl receiving the: ends r1, it of the shaft of the cloth beam [-9 on which is wound the cloth T produced on the weaving loom.

On the middle section of the axle 22 is freely mounted a helical wheel 25, the hub of which is extended at both sides by sleeves 26, 2'! each provided with at least one teat, respectively 28, 29.

Said helical wheel and its lateral sleeves 26, 21 are freely rotatable on said axle 22; Furthermore, two collars 30, 3| are keyed to the axle 22 in spaced relationship with the free ends of sleeves 26, 21 of the hub of the helical wheel 25. Tightening screws 32, 33 secure said collars to the axle 22 and the collars are each provided with a teat 34, 35. The axle 22 is partially surrounded by two coil springs 36, 31, the first one being attached at one end to the teat 28 of the sleeve 26, and at the other end to the teat 34 of the collar 30, the second spring being attached at one end to the teat 29 of the sleeve 2?, and at the other end to the teat 35 of the collar 3!. The helical wheel 25 meshes with a worm 38, the shaft 39 of which is resting in a stationary support 40 and is pro- 'vided with an operating handwheel 4I.

Suppose that the loom is operating normally and that a certain amount of cloth is already wound on the cloth beam I9, the weight of this beam is pressing down on the two racks I, 2, which causes the respective toothed pinions 20, 2I to rotate and drive the common axle 22 and the collars 30, 3|. Whilst rotating, these collars are tensioning the coil springs 36, 31, one end of said springs is kept immobilised on the hub of the helical wheel 25 which remains stationary. As the diameter of the cloth beam increases, and consequently its weight, the coil springs 36, 31 become progressively stressed, resulting in a progressive increase of their elastic reaction with the increasing diameter of the cloth'beam. The use of the proper springs, and an intermediary element between them and the cloth beam produces a practically constant counterbalance, that is to say, a practically constant pressure between the cloth beam I9 and the driving beam A is maintained.

When the cloth beam has attained a suitable diameter and before removing it from its supporting racks I, 2 it will, of course, be necessary to neutralize the reactive tension of the springs 36, 31 which have a permanent tendency to throw the racks I, 2 upwards. For that purpose it will be sufficient to turn the handle M to cause the corresponding rotation of the helical wheel 25 and of its lateral extension sleeves 26, 21. This rotation can be such that it will effect the release of the springs. When these latter are completely released, the support of the cloth beam will be free and said beam can be normally removed. When a new beam is placed with its ends II, I8 on the cradles I5, I6 of the respective racks I, 2, it will be sufiicient to turn the handwheel M in the reverse direction to obtain a tension of the springs 36, 31 which, when their elastic tension is suflicient, will drive the axle 22, the toothed pinions 20, 2|, the racks I, 2 and the bobbin or cloth beam I9. The latter can thus be brought in correct position, according to the prevailing requirements. When said cloth beam I9 is in position, it is still possible to regulate the pressure exerted by the cloth beam against the drive beam A by further turning the handwheel 4|.

With supports, as just described, it is possible to reduce considerably the obstruction of the alleys by the cloth beams and consequently to reduce also the width of said alleys. If we examine the Figure 1, representing schematically two looms 42, 43 provided with straight, vertical support racks 44, it is found that the obstruction of the alley 45 which separates said looms is considerable. If we take, for example, an alley of 600 mm. width, the obstruction would soon be such that the width L of the free passage would be at a maximum of 300 mm., so that said alley 45 should have an initial width of at least 900 mm. If comparatively we examine Figure 2, in which are represented two looms 46, 4'! provided with the device of the invention with toothed sectors I, we notice that the space occupied by the cloth beam I9 is substantially reduced, this space being at leastone half lesser than the space needed withthe known supports of Figure 1.

While a preferred embodiment according to the present invention has been illustrated and described, it is understood that various modifications may be resorted to without departing from the spirit and scope of the appended claims.

I claim:

1. In a support for the cloth beam of a weaving loom, two curved racks placed at both sides of the cloth beam and supporting said cloth beam; means to guide longitudinally said racks, an axle substantially parallel to the cloth beam, placed under the latter, toothed pinions keyed to said axle and meshing with said racks; resilient means connected to said axle whereby said means become progressively stressed with the increasing weight of said cloth beam.

2. In a support according to claim '1, said curved racks removably supporting the shaft of said cloth beams; said guide means including two slides secured to the frame of said loom; a gear wheel freely rotatable on said axle; a worm meshing with said gear wheel; a handwheel for said worm and a coil spring surrounding said axle and secured at one end to said gear wheel and at the other end to said axle. I

3. In a support according to claim 2, said racks being in the form of a circular arc with teeth disposed along the longitudinal and convex edge thereof, said slides having a U-shaped crosssection.

4. In a support according to claim 2, said curved racks having their upper end provided with a cradle to removably receive the ends of the shaft of the cloth beam, said racks being able to slide" in their respective guides under the weight of the cloth beam thereby causing rotation of the toothed pinions with which they are meshing.

5. In a support according to claim 2, said gear wheel having depending sleeves at both sides thereof, collars secured to said axle and spaced from said sleeves, and coil springs surrounding said axle and each secured to one of said sleeves at one end and to the associated collar at the other end.

J AIIVIE PIC'ANOL.

References Cited in the file of this patent Tuten Mar. 9,1943

Images