JPS6122056B2 - - Google Patents

Description

Claim 1: Individual narrow bodies 1 joined edge to edge by at least one wale made of frangible thread 31
(a) along at least one edge of each narrow body so as to form at least one scalloped edge from which the picots 20 protrude; Tsutepicotsuto forming thread 18
(b) such that each picotto has an end inserted across one wale 30 of the frangible yarn, and (c) while each picotto-forming course is formed, said picotto-forming yarn is At least two wells 14a, 14 adjacent to the scalloped edge
b) inserted across a selected one of said at least two wales so that the underlap of this wale tightly grips the picot-forming thread; and (d) inserting the reinforcement thread 22 across a selected one of said at least two wales. (e) by bonding said at least two wales, said picotto-forming yarn, and said reinforcing yarn to each other such that they constitute a composite edge structure that is resistant to elongation; A method for producing a narrow lace knitted fabric, characterized in that, after knitting the base sheet, the individual narrow bodies of lace are separated from each other by tearing.

2. Claim 1, wherein when knitting the at least two wales between the picotto forming courses, the picotto forming yarn is inserted across a selected one of the two wales.
The manufacturing method described in section.

3. During the picotto forming course, when knitting the at least two wales, the picotto forming yarn knits a selected one of the two wales.
2. The manufacturing method according to claim 1, wherein the reinforcing yarn is inserted across all of the wales and a selected one of the courses.

4. Claim 3, wherein the inserting operation of the picotto-forming yarn and reinforcing yarn is performed in the same way in each course.
The manufacturing method described in section.

5. Claim 3, wherein the inserting operations of the picotto-forming yarn and the reinforcing yarn are performed oppositely in each course.
The manufacturing method described in section.

6. The manufacturing method according to claim 5, wherein in at least one course between the picotto-forming courses, the picotto-forming yarn and the reinforcing yarn are inserted oppositely in the same wale.

7. Sacrificial band resistant to elongation by reinforcing threads 40 inserted across selected chain stitch rows of wales of fragile yarn and across several adjacent wales of the sacrificial band. 5. The manufacturing method according to claim 1, wherein a frangible thread is woven adjacent to the frangible thread, and the broken end of the frangible thread remains tied to the waste strip after separation.

8. A stable edge structure in which the narrow lace knitted fabric has at least one scalloped edge, the edge has freely hanging picots, and the picots forming threads 18 extend along the scalloped edges. At least two wales 14a, the scalloped edge of which has a chain stitch row, form each picot 20 protruding from the
14b, the picotto-forming yarn and the reinforcing yarn 22, and the narrow lace is characterized in that the picotto-forming yarn and the reinforcing yarn are inserted into the chain stitch row.

9 The stable edge structure is arranged in the wale 14a, 1
9. Narrow lace according to claim 8, having at least one heavy denier thread inserted in each course of at least one of the 4b.

10. A narrow lace according to claim 9, wherein the heavy denier yarn is provided in the form of a picotto-formed yarn.

11. The narrow lace of claim 8, wherein two heavy denier yarns are provided, one of which is a picot forming yarn and the other is a reinforcing yarn.

12. The narrow lace of claim 8, wherein the reinforcing yarn is float knitted across the base of each picotto.

Description The present invention relates to a method for producing a narrow lace fabric having at least one scalloped edge with freely hanging picotto loops, an example of such a narrow lace fabric being a lace fabric. It is a hem decoration or a thin string (garoon).

In the conventional manufacturing method of narrow lace knitted fabric,
A sheet is knitted by joining a plurality of such narrow bodies to each other directly or through an intermediate disposable band. Next, before separating the individual narrow bodies of the lace fabric from each other, this sheet is subjected to a finishing process such as dyeing. Until recently, the separation of narrow laces with deep scallops was carried out by a cutting operation, which produced a scalloped edge with picots that did not hang freely and was therefore of poor appearance. Applicant's UK patent no.
No. 1,567,608 proposes a method for producing a deep scalloped edge with free-hanging picots, in which this separation is carried out using soluble threads. Although this method can form high-quality deep scalloped edges with free-hanging picots, this method has a melting step, which increases the overall manufacturing cost of the narrow lace fabric. . The general aim of the present invention is to form sheets which can be knitted into sheets and which can be easily separated by a tearing action, so that there is no need to use melting, cutting or threading methods for separation. A narrow lace knitted fabric having at least one scalloped edge with freely hanging picots is produced.

According to the present invention, the step of knitting a knitted fabric sheet consisting of a plurality of narrow bodies joined edge to edge by at least one wale made of fragile yarn, and forming at least one edge from which a picotto is protruding; inserting a picotto-forming thread along the edge of each narrow body in order to
inserted across at least the first two wales adjacent to the edge along each picotto-forming course, such that the underlaps of these wales tightly grip the picotto-forming threads;
The wales and the picotto-forming threads are combined with each other to form a composite edge structure that is resistant to elongation, and the strips are separated from each other by tearing after knitting the sheet. A method of manufacturing a narrow lace knitted fabric is provided.

Therefore, according to the present invention, it is possible to produce a narrow lace knitted fabric with picots that are stable against excessive elongation or twisting and hang freely using a lace-type warp knitting machine. This makes it possible to produce a high-quality narrow lace knitted fabric with freely hanging picots.

By using two or more adjacent wales knitted from relatively low denier yarns and inserting picot forming yarns and reinforcing yarns into said wales, each having a relatively high denier, One or more edges can be knitted.

Preferably, said reinforcing yarn is inserted across at least two adjacent wales, one of which constitutes an edge of the knitted fabric. Picot forming threads can be inserted along one or both of the wales. The reinforcing threads can be inserted in selected courses in the same or opposite direction as the picot forming threads. By floating the reinforcing yarn across a plurality of courses, the two or more wales can be contracted in the course direction. Further, in order to prevent the picotto from being lifted from the plane of the knitted fabric, the reinforcing yarn can be float knitted across the base of the picotto.

Instead of what has been described above, the reinforcing yarn may be knitted to form any one of the wales, and the picotto-forming yarn may be knitted to cause contraction of the wale in the course direction. It is also possible to insert the thread across the wale.

The present invention will be described in detail below with reference to embodiments shown in the drawings.

FIG. 1 is a knitting organization diagram schematically showing a part of a sheet-like narrow lace knitted fabric.

FIGS. 2 and 3 are detailed views of these organization charts, showing the portions designated as and in FIG. 1, respectively.

Figures 4 and 5 are views similar to Figures 2 and 3, respectively, showing the narrow lace being separated by tearing.

FIGS. 6 to 11 are schematic diagrams illustrating modified examples of the edge knitting structure of the narrow lace according to the present invention.

12, 14, and 15 are schematic illustrations of an apparatus for separating narrow lace by tearing.

FIG. 13 is a schematic illustration of a lace sheet consisting of narrow laces with one picot edge.

The knitted fabric 10 shown in FIGS. 1 to 5 is basically knitted in the same manner as that described in British Patent No. 1567608, and the front edge 9 of the strip 11 of the narrow lace knitted fabric
and a part of the main body portion 8 are connected to the rear edge 16 of the adjacent narrow body 11 via a band-like body 50 made of disposable fabric. Each narrow body 11 consists of a plurality of wales (most of the wales located between the front edge and the rear edge of the narrow lace are clearly visible) and are made up of linear chain stitch rows 12 forming the main body of the narrow lace knitted fabric. (omitted for the sake of convenience) and a plurality of horizontally swinging wales 14. The wales 14 overlap part of the linear chain stitch rows and protrude from these wales to constitute the scalloped front edge 9 of the band-like body 11. Although the trailing edge 16 is shown in FIG. 1 as a straight edge having a picot 16a, the trailing edge could be scalloped and include free-hanging picots if desired.

The scallop-forming yarn 18 has wales 14a, 14
b, and protrudes by one stitch beyond the edge forming wale 14a every 6 courses.
0 is formed. If desired, the picot forming thread can be inserted between two or more needles to form a longer picot. In the middle of each picotto 20, the picotto-forming yarn 18 has a wale 14 in the course immediately after the course including the picotto 20.
a and 14b, then inserted only into wale 14a, and then inserted across both wales 14a and 14b in the course just before the course including the other picot 20. .

The reinforcing yarn 22 is inserted across both of the wales 14a, 14b in each course, except for the course containing picots and the courses immediately before and after it. As shown in FIGS. 1 to 5, the reinforcing yarn 22 is float knitted across these courses to form a float knit portion 25. As shown in FIGS. This floating knit portion is placed on top of the picotto forming yarns at the base of the picotto 20. As a result, the picotto forming yarn 18 is arranged between the loop 14c of the wale 14a and the floating knitted portion 25 at the base of each picotto, which suppresses the picotto from moving up and down on the plane of the knitted fabric. It has the effect of

Since the reinforcing yarn 22 is inserted under tension, it has a contraction effect on the wales 14a, 14b, thereby having a stiff accordion effect, and by pulling the wales 14a, 14b together in the course direction. It serves to capture the picotto-forming threads 18.

In this way, a composite edge is formed, which is a tightly bound yarn composite constituted by the wales 14a, 14b, the picotto-forming yarn 18 and the reinforcing yarn 22. This structure is resistant to elongation, so that during the tearing process the tearing force is confined to this edge and not elsewhere. This edge structure is connected to the patterned fabric by another thread (not shown).

Wale 30 made of fragile thread 31 is wale 1
It is knitted adjacent to 4a. This wale 30
connects the front edge of the band-like body 11 made of a narrow lace knitted fabric and the band-like body 50 which is a disposable fabric. The opposite edge of the strip 50 is connected by a frangible thread 33 to the trailing edge 16 of the next strip 11, which is a narrow lace knitted fabric.

At a point 35 where the fragile yarn 31 and the wale 14a are swung horizontally, the fragile yarn 31 is attached to the wale 14a.
It is woven into. Therefore, the band-shaped body 11 and the band-shaped body 32 are connected to each other only at these locations and at the location where the picot is inserted into the wale 30.

In order to easily break the fragile thread 31 cleanly,
The reinforcing yarn 40 has a wale 30 in each course.
(preferably all the wales constituting the sacrificial band). This reinforcing yarn 40 provides dimensional stability to the disposable fabric. Further, reinforcing threads 40 are inserted into the loops 42 of the courses on both sides of each course where the frangible threads are connected to the front edge of the strip 11. This has the effect of reliably binding the frangible threads within the band 32 and concentrating the breaking force on the underlaps 45 located between adjacent loops 42. This ensures that the frangible thread 31 is broken cleanly and that the tail of the broken underlap 45 is removed along with the band 32.

In order to facilitate the breakage of the fragile yarn 31 at the position indicated by 35, the wale 14a is knitted with a yarn having a larger denier than the other wales 14,
It is preferable that this causes a large difference in breaking stress between the fragile yarn 31 and the yarn of the wale 14a. For example, if a 20 denier polyamide yarn is used as the brittle yarn, the wale 14a will be 70 denier.
Knitted from denier polyamide yarn. Although the yarn used to knit the wales 14a may be a multifilament yarn, it is preferable to use one or several monofilament yarns. This is because the rigid sides of the monofilament yarn assist in breaking the fragile yarn.

FIGS. 4 and 5 show the state in which the fragile yarn is broken. In FIG. 4, the loop 31a of the fragile yarn is attached to the wale 14 just before being swung sideways.
It is woven into a. When the sacrificial strip 50 is pulled to the left with respect to the strip 11, the loop 31a pulls on the underlaps 14e and 14f, causing the loop 31a to break. The reinforcing thread 40 has a tendency to fix the frangible thread to the sacrificial strip 50, so that after breaking, the free end 31b of the frangible thread is fixed to the sacrificial strip and removed therewith. The underlap 14e is held by the reinforcing yarn 22 so that the knitting does not unravel (that is, from fraying). In Fig. 5, the underlaps 31d and 31e of the fragile yarn are wale 1.
4a is held by a loop 14h. When the sacrificial strip 50 is pulled to the left with respect to the strip 11, the loop 14h is elongated and the underlaps 31d and 31e are stressed and broken. The free end 31f of the frangible thread is held in the sacrificial strip 50 and removed together with it. Wale 14a,
By contracting 14b to form a composite reinforcing edge, free loops 14h are captured and the knit is prevented from unraveling.

For purposes of this specification, frangible yarns are yarns that have a lower breaking stress than the yarns used to knit the narrow lace, or that have been subjected to certain treatments such as heat setting to the sheet. This yarn has a smaller breaking stress than the yarn used later to knit the narrow lace fabric.

In order to stabilize the picotto 16a in the same way as the picotto 20, the trailing edge 1 of the strip 11 is
6 has a reinforcing edge similar to the leading edge. Therefore,
The trailing edge 16 shown in FIG. 1 has reinforcing threads 22a inserted in the same manner as reinforcing threads 22. For example, the fragile yarn is preferably a polyamide monofilament, the reinforcing yarn 22 and the stabilizing yarn 40 are both 2 x 78 denier polyamide yarn, and the picot forming yarn 18 is 4 x 78 denier polyamide yarn. .

Other embodiments of stable picotto edge constructions for narrow lace fabrics are described below with respect to FIGS. 6-11.

In FIG. 6, both the reinforcing yarn 22 and the picot forming yarn 18 are inserted across both the wales 14a and 14b in each course. The reinforcing thread 22 and the picot forming thread 18 are inserted in opposite directions, and the loops 22a,
18a are inserted so as to face each other.

In FIG. 7, the reinforcing yarn 22 and the picot forming yarn 18 are arranged in wales 14a,
14b. These insertion movements are the same movement, which ensures that the picotto-forming threads 18 and reinforcing threads 2
2 are arranged similarly.

In FIG. 8, the picotto-forming yarn 18 is attached to the wale 1 in the same manner as in FIGS. 6 and 7.
Although the reinforcing thread 22 is inserted across both the wales 14a and 14b, the reinforcing thread 22 is inserted across both the wales 14a and 14b only in the courses immediately before and after the picotto formation course.
b, and the middle course is float knitted across. This structure allows the use of heavier denier yarns 22 than in the other embodiments described above.

In FIG. 9, picot forming thread 18 has been inserted across both wales 14a, 14b in a manner similar to that of FIGS. 6 and 7. The reinforcing thread 22 is inserted only into the wale 14a, and the insertion movement of the threads 18 and 22 is carried out in opposite directions, so that the loops 18a and 20a
are arranged facing each other around a common underlap 14k.

A similar organization is shown in FIG. In this case, the reinforcing yarn 22 has a wale 1 in each course.
4a and 14b, whereas the picotto-forming yarn is inserted only into the wale 14b, except for the picotto-forming course.

Also in this case, the picotto-forming yarn 18 and the reinforcing yarn 22 are inserted in opposite directions, so that the loops 18a and 22a are connected to the wale 14b.
They are arranged facing each other around a common underlap 14m.

In the stabilized edge example described above, the denier of both the reinforcing yarn and the picot forming yarn is several times greater than the denier of the ground yarn knitting wales 14a and 14e. The main part of the bulk of the reinforcing edge is therefore constituted by threads 18 and 22 bound together by wales 14a and 14b.
The loops of each wale are knitted relatively small;
This causes the underlap to firmly grip the threads 18, 22 passing under it. During the course of forming the picot, the thread 18 passes under two underlaps 14m on each side of the picot, which grip the thread 18 and resist its movement as the picot is pulled. This gripping effect is further increased if the reinforcing thread also passes under the same underlap.

As described in some of the previous embodiments, if threads 18 and 22 are inserted oppositely and the pulling force on the picot is sufficient to overcome the gripping force of the underlap, the resulting movement Therefore, the opposing loops 18a, 22a are moved in a direction toward each other. However, since this structure is already in a compressed or constrained state, the movement of the thread 18 is restricted.

In another embodiment shown in FIG. 11, reinforcing thread 22 is not used. In FIG. 11, the picot forming thread 18 is inserted across both the wales 14a and 14b. If desired, wales 14a and/or wales 14b can be knitted with heavier denier yarns to provide bulk to the edges and to supplement gripping force on the picot forming yarns. Among the embodiments described above, an embodiment in which both the picot-forming yarn 18 and the reinforcing yarn 22 are inserted into two wales is preferred. Because reinforcing thread 2
2 causes the wales 14a and 14b to contract in the direction in which they approach each other in the course direction and maintain a uniform spacing along these wales 14a and 14b, making it possible to make the picots more uniform.

This is particularly advantageous when performing traversing movements to form scalloped edges. That is, in this case, if the reinforcing thread is not inserted, the tension will change, and as a result, the length of the picotto will change. Additionally, the stability of the sacrificial strip 32 also promotes uniformity in the length of the picots. Since the picot-forming thread 18 and the reinforcing thread each undergo a separate insertion movement, each thread is controlled by a separate bar in the knitting machine. Therefore, by adjusting the weight of each bar, the tension of each thread 18, 22 can be varied individually, affecting the degree of contraction of the wales 14a, 14b in the course direction, and changing the length of the picot 20. It is possible to change it.

Furthermore, in other cases, when the base of the picotto is held by two needles, the nip yarn holding the reinforcing thread on one needle and connecting the loop of the picotto to the handle is held by two needles. Hold the loop of the picotto in place by pinching the chain stitch row of the base.

Alternatively, the base of the picot can be passed over two needles and held only by the chain stitch row close to the handle. In order to hold the loop of the picotto in place, the reinforcing thread is
It can be held on one needle and a nip yarn sandwiching two base chain stitch rows.

As is clear from the above examples, the present invention
It has a scalloped edge with freely hanging picots, which edge has a compound edge structure running along its contour, which interconnects adjacent narrow bodies by frangible threads. The present invention provides a method for manufacturing a narrow lace in which adjacent narrow bodies are separated by tearing, leaving a picot that hangs freely from the scallop edge.

Reference will now be made to FIGS. 12-15, which schematically illustrate an apparatus for separating narrow laces by tearing.

The apparatus 120 shown in FIGS. 12 and 14 is, for example, an apparatus for separating narrow laces having only one picot edge as shown in FIG. 13. In FIG. 13, a narrow lace 100 has a picotto front edge 101 with a scallop, and this front edge is connected to a narrow body 102 which is a disposable fabric.
02 is connected to the trailing edge 103 of the adjacent narrow lace 100 without a sharp point. When using the apparatus of FIG. 12, adjacent narrow laces 100
The disposable narrow bodies 102 adjacent to each other are separated from each other. The disposable strips 102 are then separated from the adjacent strip laces by conventional separation techniques such as cutting.

The device 120 has a pair of freely rotating nip rollers 121 between which a sheet 107 of narrow lace passes. Surface 12 passing through the nip between the pinching rollers 121
A pair of freely rotating rollers 12 are provided at the top and bottom of 6, respectively.
7,128 are arranged. Tear area 130
rollers 127 and 128, respectively, to produce
A narrow lace and an adjacent disposable narrow body are fed alternately on top of the lace. The separated narrow lace and disposable narrow body are then fed through a drive assembly 132 which grips the knitted fabric, pinches the sheet 107, passes it between rollers 121 and , 128. The drive assembly 132 includes a pair of driven rollers 135 that have friction surfaces that frictionally grip the knitted fabric. A roller 136 is placed on these rollers 135 so as to be supported by the roller 135, and the knitted fabric is placed on the roller 135.
It is wrapped around 36. The separated narrow lace is then fed to a pair of driven pinch rollers 140 which pull the fabric from the drive assembly 132 and out of the machine.

Ideally, the tear zone 130 is placed on the surface 126 such that the angular direction of pull on the alternating strips is approximately the same relative to the surface 126, i.e., the angles β and α are approximately the same. located at or near.

If desired, to adjust the position of the tear zone 130 above and below the surface 126, the separate narrow laces and disposable narrow body can be operated by separate drive assemblies 135 as shown in FIG. be drawn out. Each drive assembly 132 is independently controlled so that its respective withdrawal speed is variable. Thus, by pulling the fabric over either roller 127, 128 by either drive assembly 132 at a faster speed than the other, tear zone 130 is pulled toward either roller 127 or 128. be moved to.

For example, the changing device 150 shown in FIG.
each having two picotto edges as shown in the figure,
Adjacent narrow laces with a disposable narrow body in between can be separated. In this device 150, parts similar to those in device 120 are designated by the same numbers.

Device 150 has two tear zones. In one tear zone 130, the narrow lace and the disposable narrow body adjacent one edge thereof are separated in a similar separation manner as described with respect to FIGS. 12 and 14.

After the separated narrow laces and disposable narrow bodies pass through one or more drive assemblies 132, they are subjected to a second tearing action. in this case,
The disposable strips are fed over rollers 127' and the narrow laces 100 are fed over rollers 128' to independently driven second drive assemblies 132'. These assemblies have the same structure as the drive assembly 132 described above. These separated disposable strips and laces are then pulled out of the drive assembly 132' by the pinch rollers 40 and out of the machine.