DE8125088U1 - "DEVICE FOR PRODUCING A WHOLE BINDING OF THE SIDE EDGES OF A FABRIC IN A WEAVING MACHINE" - Google Patents

Description

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Device for producing a
Full-turn binding of the margins
of a fabric in a loom

The invention relates to a device for producing a full-turn weave of the side edges of a fabric. These
Device is inevitably driven, that is, independently
from the tension of the binding threads and allowed through yet
Presetting of the crosshairs at the beginning

as possible to keep the compartment depth constant and to minimize it Ϊ

and the tension of the binding threads and thus enables a productive weaving output in connection with a woven fabric
high quality.

As is known, the operation of looms in which f

Picking pliers'

through two weft threads into the compartment opening |

be set that each inserted weft thread on both sides |

The edges of the woven fabric-is cut off = There are a

therefore the weft threads on the side edges of the fabric are not |

suitably connected to the warp threads. The side edges have |

hence the tendency to fray and fray. I.

To avoid this usually called "weft float";

There were various types of binding to $

the fabric side edges, of which the use- |

The most important thing is the full-turn binding. This uses four to- {

additional binding threads, which with each inserted weft thread |

appropriately devoured. In detail, two pairs of I

of binding threads alternately and oppositely on one f

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shifted vertical plane, similar to what happens with the warp thread, so that alternate on opposite sides the weft threads used are wrapped. | In addition, the binding threads become one of the thread pairs as well shifted in a horizontal plane and crossed each other to clamp the binding threads of the other pair together. The simultaneous movements of both pairs of binding threads thus result in a very strong and secure bond against the fraying of the fabric side edges.

Conventional technology has provided devices, already designated "SPLITZ", which are suitable for carrying out such a bond. One of these conventional devices | lines, which uses the vertical back and forth movements of two adjacent heald frames to perform the vertical displacement of the two pairs of binding threads, consists essentially of a stand that is vertically attached to a heald frame and is provided with two mutually facing identical needles in the needle eyes facing each other the two binding threads of a thread pair are inserted after they have passed through two inlet thread guides and suitable deflectors. This stand then acts as a support member for a cover plate, which is vertically displaceable thereon and is provided with two identical slots in its central section. These slots are symmetrically inclined with respect to the center line of the cover plate and offset from one another by 90 °. The two binding threads intended to cross the other pair of binding threads run through the corresponding ends of the slits. The latter binding threads are driven vertically by the two shafts of the ^T .iebschafts, which is close to the heald frame to which the stand is attached. The slots of the cover plate are arranged so that their ends are on opposite sides of the facing thread needles of the stand, so that the two binding threads through the corresponding

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Pass through the ends of the slots, are always arranged outside of the two other binding threads. Latter are passed through the needle eye of the needles in such a way that that after crossing they are in a position in which they clamp the other two binding threads together. In addition, a braking device is arranged in the free area between the two needle eyes of the thread needles, which delays the stroke of the cover plate and allows the two binding threads to cross through the corresponding Ends of the plate slots. When the plate is braked, the two binding threads that run through the corresponding Movement of the shafts of the heald frame continues to be pulled up or down, forced along the plate slots to slide and thus have to be routed to the other opposite ends of the slots so that .the plate can continue its corresponding movement. This is the reason for the cross threads.

However, such conventional apparatus has a number of disadvantages. The most important of these is essentially based on the fact that the plate is driven negatively, i.e. that the movement of the plate along the stand is caused by the tension of the two binding threads which are passed through the Plate slots through; will. Considering that this voltage must be so large that correct operation the device is guaranteed, it is very often greater than the tension of the actual warp thread and can even become so large that serious difficulties arise in weaving, either due to breaks from to strongly tightened binding threads or the fact that stronger binding threads have to be used, the quality of which is therefore of that deviates from the warp thread. Serious results arise from this Problems with dyeing or finishing a fabric produced in this way.

There is another disadvantage of the conventional device in the fact that there are substantial differences in the depth of the compartment formed by the binding threads, so that one such depth cannot be kept constant. The results are adjustment difficulties and likely thread breaks through the entry pliers that are intended to penetrate the compartment opening. The latter disadvantage can only be caused by one wide compartment opening can be eliminated. The consequence, however, is an extension of the length of the binding threads, so that their tension is increased, and consequently the weaving difficulties noted above become worse and worse. The voltage difference between the binding threads passed through the plate slots acts on the plates together with the frictional force, which is opposite to the displacement movement and the braking of the plate itself. Because the latter force through the dust -and other impurities that are always present in weaving rooms, is variable with time, the plate is stopped at various points in its vertical stroke so that it gives rise to different compartment opening widths.

Another disadvantage is caused by the fact that the crossing of the two binding threads through the corresponding Ends of the plate are passed through, takes place in the free area between the two Nadelöhren'der needles in the stand. Consequently, this free area, i.e., the inter-needle gap, must be wide enough to allow efficient crossing. This requires a wider shed opening for the binding thread than for the warp threads with the specified harmful ones Follow.

The object of the invention is to eliminate the specified disadvantages and to create a device or one SPLITZ for the production of a full-turn binding of the side edges of a fabric, which the panel is independent of the Tension of the binding threads inevitably drives the width

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the compartment opening formed by the binding threads and the distance (intermediate needle gap) between the needle eyes of the stand needles and thus also the compartment opening width, as far as possible, reduced by on the actual Presetting takes place at the beginning of the heald switch of crossing the two binding threads passed through the panel slots.

This object is achieved according to the invention by the subject matter of claim 1.

An advantageous further development of the invention is the subject of the dependent claim.

This result is achieved essentially by the fact that the vertical displacement of the plate along the stand by the effect of the second control plate is generated, which has a substantially U-shaped contour. The control panel is hinged to a heald frame, which is connected to the heald frame carrying the stand, the articulation takes place by means of a connecting rod. The control plate is therefore driven vertically by the adjoining heald frame and through the stand carried vertically displaceable. The second control plate takes the first plate along with it the legs of their U-shaped cross-section acts on the end edges of the first plate. This achieves two things. The movement of the plate is made independent of the tension of the binding threads, so that this tension is applied to the Size can be reduced to help prevent livestock disorders is recommended, and the shed opening caused by the binding threads is kept constant, since these are now is mechanically defined by the constant vertical back and forth movement of the heald frames instead of the tension of the Binding threads.

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To preset the crossing of the two through the plate slots The binding threads passed through is the second control plate, which is in the form of a U-profile (or a "C") provided with two slots at their bisection line, which are the exact counterpart of those of the first cover plate, , but are inclined opposite to this. The two through the slits of the first plate are also threaded through the slits of the second plate passed through. The second plate is dimensioned so that the distance between its webs is equal to the length of the former Plate plus double the height, each of the two inclined slots, while the first plate has a brake spring is provided which, when the stand is acted upon by friction, prevents the first plate from sliding freely along it.

As will be described in detail, begins when the heald frames are moved to perform the mutual switching, the second C-shaped control plate, the other spring-braked Only take the plate with you if the latter has brought one of the two bars to the corresponding one Edge of the other panel, i.e. after the other panel is perpendicular along a distance of double Slot height has been moved. During the first shift, however, the slots of the second control plate are in register with continuously changing areas the similar oppositely inclined slots of the counter plate, which is braked and thus now in the Is at a standstill. Upon completion of this shift, this state of coverage is from one end of the slot to the other the braked plate arrives. As a result, the two are thus passed through the slots of the two plates Tying threads are forced to move from one end to the other of the other plate, i.e. they cross each other. However, this crossing is indicated by the presence of one of the

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prevents both needles of the stand. However, these two binding threads are preset for crossing. That However, cruising actually takes place immediately and within a very narrow space once the distraction of the Needle is over. The needle in question is the one along which the thread preset for crossing runs must, i.e. to the end of the affected needle. This obviously allows the gap between the two to be minimized facing needle eyes of the two facing needles of the stand, so that in this way a narrow compartment opening is achieved.

In the following an embodiment of the invention is described with reference to the drawing. Show it:

Fig. 1 is a front view of a binding apparatus

direction according to the invention with a schematic representation of the Full-twist weave, which is attached to the Edges of a fabric is executed;

Fig. 2 is a partially sectioned side

view of the binding device of Fig. 1;

Fig. 3 is a front view of the second

Control plate of the device of Fig. 1;

Fig. 4 is a side view of the control plate

te of Fig. 3;

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5 is an enlarged front view of a

Detail A-A of Figure 1;

FIG. 6 shows the same detail as in FIG. 5

in a subsequent work step;

Fig. 7. a front view, as in Fig. 1,

in which, however, the heald frames inevitably shifted compared to this figure are;

Two sets of warp threads 1 and 2 are made in a conventional manner driven vertically by heald frames, not shown, and intertwined with weft threads 3 to form a fabric 4. The side edge of the fabric is prevented from unraveling by a full twist weave 5, which is secured by a binding device or a SPLITZ with four additional binding threads 6 to 9, which are used to distinguish between the drawing are shown with different lines.

The binding device or the SPLITZ consists of a stand, which consists essentially of two U-shaped or C-shaped Sections 11 and 12 consists. These are perpendicular by two metal blocks 13 and 14 at their bases and facing each other connected with each other. The two bases are by screws 15 at the ends of the C-shaped sections and in addition fastened by screws 16 to a heald frame 17 of the loom in such a way that the stand 10 on the heald frame is arranged vertically. In the middle part of the section 12 are through the shoulders 12 ', 12 "two inlet bores 18, 19 formed through which the additional binding threads 6,7 are passed. These binding threads come from suitable ones donating coils and v / earth then wound around deflection grooves 12,21 in the metal blocks 13,14

are formed, and are then through the facing and very close to one another arranged needle eyes 22 or 23 of the same two needles 24,25 passed through. These latter are interconnected by the metal blocks 13 »14 held facing.

The edges of the two facing frontal vertical shoulders 11 ', 12 ^! of the two sections 11 and 12 act like similar guides for a plate 26, which for this purpose has two vertical grooves 27 on its side edges (only one of which is shown in FIG. 2, while the other is arranged opposite one another) into which the edges can be used. The plate 26 has two identical slots 28 and 29 in its middle part, see FIG. 28 ″, 29 ″ are located on opposite sides with respect to the needles 24 and 25 of the stand 10 facing one another. The two additional binding threads 8, 9, which also come from suitable dispensing spools, run through the slots 28, 29. On the front side of the plate 26, a metal sheet 32 is fastened by means of rivets 31, which is a flat braking spring 33 which acts on the front shoulder 11 'of the section 11 of the carrier 10 in such a way that, by friction, the plate 26 can slide freely along the Stand 10 prevented. The edges of the two rear shoulders 11 ″, 12 ″ of sections 11 ″, 12 ″ arranged facing each other (only shoulder 12 ″ is visible in FIG. 2, while the other is opposite and is eliminated from the view due to the cross-sectional representation) act against it as a vertical guide for a second plate or control plate 34.

The control plate is made up of a rectangular block 35 a rigid plastic formed (Fig. 3.4), in which

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lateral edges two vertical slots 36 are formed (in Fig. 2.4 only one slot is visible, while the other is on the opposite side), ir which the edges of the vertical shoulders 11 ", 12" are inserted. In the middle part of the block 35 there are two slots 37, 38 formed which are exactly the same, but their inclination with respect to the corresponding slots 28,29 of the plate 26 is opposite, see Fig. 5,6. The additional both binding threads 8.9 v; earth thus passed through the latter slots 37.38. At the top and bottom of the Blocks 35 are also fastened by screws 39 to L-shaped metal rods 40 and 41, the protruding webs 40, 41 'of which cooperate with both edges, namely the upper 42 and the lower 43 of the plate 26 (FIG. 2), which thus is included between the webs. The length of the block 35 is chosen so that the distance between the two protruding Web 40 ', 41' equal to the length of the plate 26 plus is twice the height of each of the two inclined slots 28, 29 and 37, 38, compare the height h in FIG is articulated by means of a pin 44 at the end of a connecting rod 45, the other end of which is connected by a pin 46 a bracket 47 is articulated. This tab is fastened by screws 48 to the heald frame 49, which is attached to the Stand 10 carrying heald frame 17 is connected. With this arrangement, the second control plate 34 is longitudinally perpendicular of the stand 10 is driven directly by the vertical back and forth movement of the heald shaft 49.

The operation of the above apparatus will now be described.

When the two heald frames 17.49 reach the open position shown in FIGS. 1 and 2, in which the heald frame is 49 are in its top dead center and the heald frame 17 in its bottom dead center, the plate 26 is through the

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* Effect of the second control plate 34 along the stand 10

moved up. The control plate 34 is driven by the heald frame 49 and acts on the lower edge 43 jl of the plate 26 through its lower web 41 '.

Thus, in this position, the two plates 26, 34 assume the arrangement of FIG two additional binding threads 8, 9 through the corresponding lower ends of the slots 37 and 38 of the plate 34, respectively and also through the corresponding upper ends 28 ', 29' of the Slits 28 and 29 of the plate 26 are guided so that the binding threads 8, 9 with respect to the needle 24 of the stand 10 are on opposite sides. When the heald frames 17, 19 begin to reverse their positions, the begins Control plate 34 under the drive of the heald frame 49 along the stand 10 to come down. The braked by the spring 33 However, plate 26 remains stationary until its upper edge 42 contacts the upper leg 40 'of the control plate 34 i.e. until the control plate 34 has moved downward by the distance h. During such a shift by the distance h of the control plate 34 are its slots 37, 38 (FIG. 5) opposite the corresponding slots 28, 29 of the stationary plate 26 shifted downward and come into register with the latter slots at locations which are of the upper ends 28 ', 29' of the lower ends 28 ", 29" of the Slots 28,29 of the plate 26 are offset. Finally, at the end of the stroke h, the slots of the two plates are located 26, 34 at the lower ends 28 ", 29" of the slots 29 of the stationary plate 26 opposite one another.

As a result, the two binding threads 8, 9 are forced to move from the upper ends 28 ', 29' to the lower ends Ends 28 ", 29" of slots 28 and 29 of plate 26, respectively move and thus forced to cross. The actual cruising is made possible, however, by the presence of the needle

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24 prevents, see Fig. 6, which shows how the binding thread 8 is forced to rotate from above around the needle 24, the same applies to the binding thread 9 from below. When the control plate 34 begins, the plate 26 down take with you, the situation is summarized that shown in Fig. 6, the binding threads 8.9 already for the crossing are prepared: The actual crossing takes place immediately and within a minimum space if the The deflecting action of the needle 24 is over. The binding threads are forced to creep, i.e. cross, along the needle takes place when the plate 26 overtakes the needle eye 22 of the needle 24 on its downward stroke and thus by the free area is moved, which is left free between the needle eyes 22, 23 of the two needles 24,25 of the stand. The two plates 26, 34 then continue their downward movement until they reach the end position shown in FIG. As soon

As soon as the heald frames 17, 19 begin to reverse their mutual positions in order to restore the initial open position, the control plate 34 begins in this state to be displaced upwards and provides one another state of crossing over for the binding threads 8, 9, the cycle described above thus being repeated.

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Device for the production of a full-turn necking of the side edges of a fabric in a loom

To prevent weft float in a conventional Device for producing a full-turn binding of the side edges of a fabric is the device by a second control plate 34, which is hinged to the heald frame 49, which adjoins the heald frame 17, with to which the main control plate 26 is connected, the main control plate 26 is braked (33). The additional control plate 34 has two slots 37,38 which the slots 28,29 the main control plate 26, but are inclined in the opposite direction. The two additional slots are supposed to take up two additional binding threads 8,9, the distance between the webs 40 ', 41' of the additional control plate 34 being equal to the length of the main plate 26 plus double Height. Each of the slots 28,29 of the main control plate 26 is.

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Claims (2)

• I <> t »Γ · r · Dr- F. Zumstein sen. - Dr. E. Assmann - Dr. R. Koenigsberger Dipl.-Ing. F. Klingseisen - Dr. F. Zumstein jun. PATENT LAWYERS APPROVED REPRESENTATIVES AT THE EUROPEAN PATENT OFFICE REPRESENTATIVES BEFORE THE EUROPEAN PATENT OFFICE Te / Li Case 1327 NUOVO PIGNONE S.p.A., Florence / Italy Device for the production of a full-turn end of the side edges of a fabric in a weaving machine 1. Apparatus for producing a full-turn weave of the side edges of a fabric in a loom, with a stand that is vertically attached to a heald frame of the loom, which has two identical, facing needles, through the facing needle eyes of two binding threads pass and the one on his Front side carries a plate that can be moved vertically on it, which is provided with two identical slots in its center, which are symmetrically inclined with respect to the horizontal center line of the plate and offset by 90 ° from one another, and through their on opposite sides with respect to the needles of the stand facing each other if two more binding threads are passed through,
characterized in that the stand (10) has a second control plate (34) on its rear side and at a distance from the plate (26) • · C 4 r · • · ■ * f * ■ · carries, which essentially has the shape of a U-profile, which is displaceable along the stand, which is articulated to a heald frame (49) via a connecting rod (45) which is connected to the heald frame (17) carrying the stand (10), and with its C-shaped webs (40 ', 41') alternately on the upper and lower edges (42, 43) of the first plate (26), which is enclosed between the webs (4O ', 41') of the second control plate (34) is, and is provided with a the stand (10) acting on the braking spring (33) that the second Control plate (34) is provided in its center with two exactly identical slots (37, 38) which are inclined backwards with respect to the slots (28,29) of the former plate (26), and that the two additional binding threads (8,9) are passed through the slots (37,38) of the control plate (34), which are so dimensioned is that the distance between its two webs (40 ', 41') is equal to the length of the first plate (26) plus twice the height of each of the inclined slots (37,38). 2. Apparatus according to claim 1, characterized in that the C-shaped control plate (34) by a right-angled Block (35) is formed from rigid plastic, in the middle area of which the slots (37,38) are formed are and at its upper and lower ends two L-shaped and the bridges. (40 ·, 41 ') forming metal rods (4O, 41) are attached, and that the block (35) has two vertical grooves (36) on its lateral edges has, inserted into the two vertical guide shoulders (11 ", 12") for guiding the rear of the stand (10) are.