LU87523A1 - Shuttleless loom control device - Google Patents

Abstract

Each band in the weft inserter is provided with a longitudinal series of slots and a corresp. tooshed wheel which engages in the slots. In oscillating toothed segment drives tooth a wheel and along its central line has a slot coupling including a slider which ensures articulation in time with the head of a connecting rod of a connecting rod/crankshaft mechanism driven by a shaft on the loom, and with the pivot of a rocker which follows the oscillation of toothed segment. The second pivot is supported by a slider which can be fixed along a guide at different distances from pivot of toothed segment so that is turns through different angles when rocker is displaced. (First country equivalent to LU--87523-A).

Description

V

8 3 BL 4233

GRAND DUCHY OF LUXEMBOURG

............................... *.

Mr. Minister of .1.7 ___________ ymt- of the Economy and the Middle Classes, .., Service of Intellectual Property

Title elivre LUXEMBOURG

Invention Patent Application -------------------------------------------- ---------......- r ~ (1) I. Request

The company called: MALNAC SA _______________________________________________________________ (2) _______________________________________________5f rue CM Spoo________________________ __________________ ______________________________________________________________ L-2546 LUXEMBOURG____________________________________________________________________ - .. Represented by .....: E.Tl, -_- £ REYLINGER & E. MEYERS, Inq ..... ..cons. eiji 3) _EL-JL ____ i.6, ........ rue du Cimetière LUXEMBOURG Mandata ire s______________________ deposit) this .......... ten „.. s..ept..jnai-. mil_-ncn.f-_ce.nt_, four ...... twenty nine______________ (4) at _1.5-. · _001- hours, at the Ministry of the Economy and the Middle Classes, in Luxembourg: 1. la present request for obtaining a patent of invention concerning: ----------------------------------- ---------------------------------------------------------- ---------------------------------------------------------- ---------------------------------------------------------- --------- (5) ..... M ...... à .... mô.uvements _________________________________________________________ alternative ...... in trades without shuttle11__________________________________________________________________________ 2. description in language ____________________________ French ....................... of the invention in triplicate; 3 ........................ A ...................... planks drawing, in three copies; 4. the receipt of the taxes paid to the Luxembourg Registration Office on May 16, 1989________________; 5. the delegation of power, dated_______Luxembourg_______________ on May 11, 1989_________; 6. the successor document (authorization); declares (s) assuming responsibility for this declaration, that the inventor (s) is (are): (6) .................... .................................................. .................................................. .............................. Λ _________________________________________________________________________________________________________________________________________________________________ claims (s) for the above patent application the priority of one (s) application (s) of (7) ........................................... .................................................. .................................................. ................... filed in (8) ____________________________________________________________________________ — ..................... ...........

on (9) .............................................. .................................................. .................................................. .................................................. .................................................. .................. — ............................

under N ° (10) ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ in the name of (11) _________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ elect (elect) domicile for him (her) and, if designated, for his representative, in Luxembourg__________________________________________________ .............. .................................................. ..................................... 4fi., .... rue ..... of ...... Ciinaiifire ..: ________________________________________________________________________ (12) seeks (s) the issue of a patent for the invention for the subject described and presented in the abovementioned appendices, with postponement of this issue to _________________________________________ /! _................................... ............................................month. (13)

The deputy / representative ^^ .. ^^ „-_- ^ ____________________________________________________________________________________________________________________________ (14) * Π. Deposit Minutes

The aforementioned patent application has been filed with the Ministry of the Economy and the Middle Classes. Property Department InteUprfu§lêeà JuXembourg, dated: May 17, 1989 / “. '·· · I Pr. The Minister of the Economy and the Middle Classes, at .... 15., -. 00 .. ...... hours I | / \] § j & / d.

iPOgS 'Af / The head of the intellectual property DRM service, A 68007_ XÎfo_AA _ EXPLANATIONS RELATING TO THE DEPOSIT FORM. / // '^ (1) if applicable' 'Request for a certificate of addition to the main patent, at the main patent application No ..... M ........... . ”- (2) enter the names. first name, profession.

I; u, 'Λ address of the applicant, when the applicant is a private individual or company name, legal form, address of registered office, when the applicant is a legal person - (3) enter ^ the surname, first name, address of the authorized representative , industrial property attorney, with special powers, if any: 'represented by ........... acting as an agent' BL 4233 Descriptive memorandum filed in support for an invention patent application for: "Device for controlling grippers with reciprocating movements in non-shuttle looms" MALNAC SA

5, rue C.M. Spoo L-2546 LUXEMBOURG

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DEVICE FOR CONTROLLING CLAMPS WITH RECIPROCATING MOVEMENTS IN TRADE WITHOUT SHUTTLE

1 The present invention relates to a control device specially designed to determine the reciprocating movements of the pliers which ensure the introduction of the weft into the looms 5 without shuttle.

As is known in the shuttleless trades, the introduction of the weft yarn is carried out by means of two pliers judiciously studied (and also sometimes called, because of their diversified shapes, needles or lances.) During the long rest phase of the comb and the corresponding opening of the crowd, these two pliers carried cantilevered by the respective flanges of the trade, first of all carry out a movement towards each other from 15 these same flanges and, then, after having met at the center of the loom and having transmitted the weft thread to each other, return to the flanges of the loom to allow the striking of the comb.

There are also known non-shuttle looms 20 in which each of these same clamps is fixed to one end of a corresponding flexible strip mounted to slide in a sort of curved guide. The two curved guides are arranged in a vertical plane situated parallel to the front face of the loom and extending outwardly with respect to these same flanges and, sometimes even, under the loom, so as not to interfere with the oscillations of the leaf on which the comb is mounted. On the other hand, each strip is provided with a longitudinal series of slots, in which mesh the teeth of a gear 5 or of a corresponding toothed wheel which is driven so as to rotate alternately in one and the in another direction, so as to take the ribbon out of the guide and bring the corresponding pliers to the center of the loom and vice versa, the ribbon being removed and the pliers brought back.

There are many types of controls used in the past for these gears, but which have not worked entirely satisfactorily. For example, with the commands commonly used, the ribbons of the clamps for introducing the weft thread do not have sufficiently low speeds and accelerations to ensure in the center of the loom, when the end of stroke of the clamps corresponds, a correct passage weft thread from one clamp to another.

20 On the other hand, the size of the looms is large, so that the grippers travel paths during their return stroke after leaving the ros.

Other drawbacks are due to the fact that the known control devices are not perfectly suitable for use on looms having, to a certain extent, fronts of different useful width.

An adjustment possibility is therefore provided to allow the working length (or the width of the fabric produced) to be modified in the same trade and, to a certain extent, without empty stroke of the clamps; in this way, a gentle loosening of the wire is achieved and the clamps are less accelerated at the end of the stroke.

r 3 1 The object of the present invention is to overcome the aforementioned drawbacks.

In accordance with one aspect of the present invention, there is provided a control device for moving the ribbons carrying the weft thread insertion pliers back and forth in the loom without shuttle, in which each ribbon is provided with a longitudinal series of slots in which the teeth of a corresponding toothed wheel 10 mesh, characterized in that it comprises an oscillating toothed sector driving said toothed wheel and having, along its bisector, a coupling with slits comprising a slide, said coupling being articulated, on the one hand, at the foot of the connecting rod of a connecting rod / crank system which is driven by a cyclic shaft of the loom without shuttle and, on the other hand, to the journal a pendulum which follows the oscillations of said toothed sector, while the second journal is supported by a slide, which can be fixed along a guide at different distances from the journal of the toothed sector, so e that the toothed sector pivots at different angles when the balance is moved.

Other characteristics of the invention will emerge more clearly from the description below, relating to a preferred embodiment of the control device shown, by way of example only but not limited to, in the appended figures, which represent respectively: Figure 1, a schematic partial front view of a shuttleless loom.

Figure 2, a detailed view of an order according to the present invention seen from one side of the loom.

Figure 3, a plan view and partially r 4 "1 in section of the same control device as in Figure 2, along the line III-III of Figure 2.

Figure 4, a view of the slide supporting the second pin, seen from one side of the loom.

5

If we refer to the figures, we see that the reference number 1 designates the ros of a loom without shuttle. A lower reinforcement 2 of the ros is fixed on a leaf, not shown, which oscillates in a manner known per se around a horizontal axis parallel to the front of the loom and which is disposed between the two flanges thereof . Each flange has two corresponding pairs of vertical elements 3 which are parallel to it and which are connected to it from the outside.

The reinforcement 2 has, at the front, a threshold 2a covered with a special seal and on which two clips 4 and 5 can slide, each fixed to the upper end of a corresponding ribbon 6.

The clamps 4 and 5 ensure the introduction of the weft thread. The clamp 4 can be, for example, that which is used to grip the weft thread and is therefore the pulling clamp, while the clamp 5 can play the role of introducing and transmitting the weft thread to the preceding clamp .

The strips 6 are flexible and are mounted to slide in kinds of guides or sheaths 7, which are arranged in a common plane parallel to the front of the loom. From its upper end 30 contiguous to a corresponding end of the ros 1, each guide 7 has a rectilinear part which continues downwards outside to the corresponding flange of the loom by a curved part which can end in a rectilinear part lower facing the center of the trade.

5 1 The ribbons 6 are flattened horizontally, parallel to the flanges of the loom. Each ribbon is provided with a longitudinal series 30 distributed at regular intervals. In the slots of a series 5 meshes a toothed wheel or gear, 8, which is keyed on one end of a corresponding shaft 9. Each shaft 9 is pivotally mounted on a bearing 10 which is arranged horizontally and parallel to the elements vertical 3, near the upper end 0 of the corresponding guide 7, through which the wheel 8 passes to mesh with the corresponding ribbon 6.

At the end of each shaft 9 which does not mesh with a toothed wheel 9 is keyed a bevel gear 15 11 which meshes with part of a conical toothed crown 12a fixed to a sector 12b. Each toothed sector 12a-b is pivotally mounted between the corresponding pair of vertical elements 3; it is, in fact, fixed to a pin 13 which is pivotally mounted on said vertical elements 3 and which is perpendicular to them.

The pair of vertical elements 3 also carries a second trunnion 14 parallel and coplanar with the trunnion 13 but located, relative to the latter, 25 on the side opposite to the wheel 8. The second trunnion 14 acts as a pivot for a balance 15 The second pin 14 is mounted in cantilever on a lateral slide 16 which can move along a guide 17 of a circular disc 18 projecting outside 30 of the vertical element 3.

The slide 16 has four orifices 19 extending longitudinally and into which four fixing screws 20 penetrate: in this way, the slide 16 and the second pin 14 can be fixed along the guide .17 at different distances * f "6 1 relative to pin 13.

The second journal 14 passes through a hole 21 in the disc 18 and supports a nozzle 22 from which the balance 15 protrudes radially. The nozzle 22 5 is pivotally mounted on the journal 14 by means of two ball bearings 23a, 23b and its sliding towards the outside is prevented by a tightening ring 24 which can be tightened by a screw 25.

On an end pin 26 of the balance 10 15 are articulated a connecting rod foot 27 and a slide 28, which is assembled by slot at 29 to sector 12b, the slot assembly: extending along the line bisector of said sector. Consequently, the balance 15 follows the oscillations of the toothed sector 15 12a-12b in the same direction. The head of the connecting rod is articulated to a second journal 30 of a crank 31 which is keyed at one end of a shaft 32. The shaft 32, which extends parallel to the front of the loom and which is located between the flanges of the latter, is driven so as to perform one revolution at each cycle of the loom. The rod / crank mechanisms 31-27 located at the ends of the shaft 32 and driven by it transform the rotary movement of the shaft 32 into an alternating movement of the corresponding toothed sectors 12a-12b and the corresponding wheels 8 of so that when one wheel spins in one direction, the other spins in the opposite direction.

The control device described above operates in the following manner.

When the ros 1 is stationary in the position where its lower reinforcement is aligned with respect to the upper sections of the guides 7, the ribbons 6 are controlled so as to come out of them and to introduce the clamps 4 and 5 in crowd 35 of the weft thread. The grippers advance to the center 7 * 1 of the loom and the gripper 5 transmits the weft thread to the • gripper 4. At this time, the wheels 8 reverse their rotation and force the ribbons 6 to return to the guides 7, while that the clamps are brought back 5. When the clamps move away from the ros 2, the ros quickly completes its oscillation so as to strike the weft thread introduced into the fabric and then return to the position of alignment with the upper parts of the guides 7. At the same time, as the pendulum 15 and the connecting rod 27 of the connecting rod / crank mechanism penetrate into the slot assembly 29 of the sector 12b, the continuation of the drive by the cyclic shaft 32 produces the favorable displacement laws of the clamps 4 and 5 and determine their end position, respectively in the center and on the sides of the loom.

It should also be noted that the adjustment of the slide 16 and, consequently, of the distance of the second pin 14 of the balance 15 relative to the pin 13 of the toothed sector 12a-l2b has the effect that the toothed sector pivots at different angles (wide angle for a short distance and vice versa) when the pendulum is moving. This adjustment offers the possibility of using the same control device 25 for the entire useful width of the looms, which may vary within certain limits; this adjustment also makes it possible to modify the working length in the same trade (that is to say the width of the fabric produced) without idling of the clamps.

The invention described above therefore achieves its objective.

To put this invention into practice, all the details described may be replaced by others, technically equivalent, while remaining within the scope of this invention.

Claims (2)

1. Control device for the movements of the tweezers for introducing the weft thread in the 5 non-shuttle looms, in which each gripper transport tape has a longitudinal series of slots in which the teeth of a corresponding toothed wheel mesh , characterized in that it comprises an oscillating toothed sector 1 0 driving said toothed wheel and having, along its bisector, an articulated slide / slide coupling, on the one hand at the foot of the connecting rod of a connecting rod group / crank driven by a cyclic shaft of the loom without shuttle and, on the other hand, to the pin 15 of a pendulum following the oscillations of said toothed sector and having the second pin supported by a slide which can be fixed along a guide at different distances from the pinion of the toothed sector, so that the toothed sector pivots at different angles when the balance is moved. 1 CLAIMS 2. Control device for the reciprocating movements of the ribbons transporting the weft thread insertion clamps in the loom without shuttle, essentially as described above, with reference to the attached figures.