JPH034666B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tufting method for forming a pattern (design/pattern) on the pile surface of a tufted fabric.

The tufting method uses a tufting machine to form a pattern on the pile surface of a tufted fabric.The tension of the pile yarn fed to the needle is changed for each stitch, and the amount of pullback of the previously tufted loop pile is adjusted to increase or decrease the pile length. How to make a difference,
There are methods of forming a pattern divided into cut piles and loop piles by determining whether or not to pull out the pile yarn loop once hooked from the needle from the tip of the thread hooking part of the looper, but these conventional methods Since the pile stitches are continuous, it is not possible to form piles at certain fixed points on the tufted fabric.

Of course, there is a method of forming piles in one place using a hand tufting machine that drives only one needle, but this method is inefficient because the piles are tufted one by one.

The primary purpose of the present invention is to provide convenience when attempting to form a pile at a desired location on a tufted fabric by separating it from the surrounding area, and at the same time,
The second purpose is to provide convenience when forming a pattern by changing the shape of the piles in the separated areas from the surrounding piles, such as height differences or cuts and loops, and other purposes. The purpose and effects will become clear from the examples described later.

According to the principle of the present invention, the looper has a looper block that reciprocates toward the axis of the needle.
In addition to the reciprocating motion of the looper block, it is installed so that it reciprocates from the looper block toward the axis of the needle, and it is determined whether or not to make reciprocating motion from the looper block toward the axis of the needle for each stitch. By selecting and determining the reciprocating motion from the looper block, it is determined whether or not the tip of the thread hooking part of the looper fits into the pile thread loop carried by the needle and hooks it. A pattern is formed depending on the presence or absence of piles or the difference in density of piles. At this time, Jitsukai 53
Using a looper that has a two-stage vertically long threading part and a short threading part as disclosed in No. In other words, adjust the long protruding thread hook at the top so that it hooks the pile thread loop carried by the needle even when the looper is not reciprocating from the looper block toward the needle axis. As a result, when the pile yarn loop is hooked to the short thread hooking section on the lower tier, the pile thread is high, but the pile thread loop is not caught on the lower tier thread hooking section and is only caught on the long thread hooking section on the upper tier. In this case, a low pile is formed, and thus a pattern is formed due to the difference in height of the pile.

Here, in the present invention, a looper is attached to a looper block that reciprocates toward the axis of the needle.
A method for selectively determining whether or not to reciprocate toward the needle axis for each stitch by mounting and carrying the looper so that it reciprocates from the looper block toward the needle axis has been previously disclosed. Patent application No. 57-21901 and Patent application No. 131053
Although it is disclosed in detail in the following issue, it will be explained again in the following examples.

The present invention will be explained below with reference to Examples.

FIG. 1 shows the first feature of the invention, and shows a plurality of needles 1, a plurality of loopers 4 cooperating with each needle 1, and a plurality of loopers 4 cooperating with each looper 4. This figure shows a local cross-sectional side view of a tufted machine equipped with knives 12 arranged in the machine width direction.

The needle 1 is reciprocated toward the base fabric 11 by a conventional drive device, and the pile yarn 10 passed through the tip thereof is pierced into the base fabric 11 to form a pile yarn loop 5. Reference numeral 13 denotes a looper bar, which is driven to swing toward the axis 2 of the needle 1 by a conventional driving means, that is, by the swinging movement of a swinging rod on which the looper bar is mounted at its tip. A looper block 3 is integrally and securely attached to the upper part of the looper bar 13.

A rear groove 14 and a front groove 15 extending in the width direction of the machine are attached to the upper side of the looper block 3, and the shank 18 of the looper 4 is connected to the axis of the needle 1 in a middle ridge 16 and a middle ridge 17 that sandwich the front groove. Slit holes 19 and 20 for insertion toward the core 2 are coaxial with the shaft core and are arranged in series in the machine width direction at the same interval as the tuft gauge. Further, the rear ridge 21 has a through hole 23 through which the piano steel wire 22 is inserted, and each slit hole 19,
It is drilled coaxially with 20.

A piano steel wire 22 connects the air sill ring piston (not shown) and the rear end of the looper shank 18, and the portion from the air sill ring to the back surface of the rear ridge 21 slides into the tube 24. Possibly coated.

The looper shank 18 has slit holes 19 and 20.
The upper edge of the shank 18, which is slidably inserted into the front groove 15 and appears in the front groove 15, has a notch 25 that is longer than the width a of the groove 15.

The rear groove 14 and the front groove 15 are closed with a cover plate 26 after the shank 18 is inserted into the slit hole 20 from the slit hole 19 and the looper 4 is attached.

This cover plate 26 has a protrusion 28 that fits into the front groove 25 and projects into the notch 25 of the shank, and since its width a is shorter than the length b of the notch 25, the difference (b-
a) A corresponding play 29 is created, and when you try to pull out the looper, the rear end of the notch hits the rear corner of the convex part, and conversely, when you try to push the looper in, the front end of the notch hits the front end of the convex part. The looper 4 collides with the corner, and in this way the looper 4 increases its play 29 length c (=b
-a) It is attached to the looper block 3 so that it can move in and out toward the axis of the needle.

The amount of movement (distance) of the swinging rod that carries the looper block 3 and moves back and forth is such that when the looper 4 is pushed into the looper block 3 and brought closest to the axis 2 side of the needle 1, the looper threading portion The tip 7 of the needle 1 is adjusted so that it does not reach the needle 1, and the length c of the clearance 29 is adjusted so that the tip 7 of the needle 1 does not reach the needle 1.
When the looper 4 is pulled out (pushed out) from the looper block 3 at the point when it is brought closest to the side, the tip 7 of the looper threading part becomes long enough to cross over the axis 2 of the needle 1. ing.

The piston is connected to the looper 4 via the piano steel wire 22.
The looper is moved into and out of the looper block 3 by being pushed or pulled, and the piston that drives the looper is selectively controlled for each stitch cycle by a conventional pattern control device.

Therefore, when the looper 4 is carried to the swinging rod together with the looper block 3 (looper bar 13) and approaches the needle axis 2, the piano steel wire 22
When the looper 4 is pushed out from the looper block 3 toward the core 2 of the needle, the tip 7 of the looper thread hooking part is pushed into the pile thread loop 5 formed by the needle 1.
The thread hook 6 and the knife 12 hook the pile into the thread hook 6, and then hook it onto the thread hook 6 until the next stitch cycle. The yarn loop 5' is sheared into a cut pile. On the other hand, when the looper 4 is not pushed out from the looper block 3, the tip 7 of the looper thread hooking part does not reach the needle 1 and therefore does not fit into the pile yarn loop 5, and the pile yarn loop 5 is attached to the needle 1. As it rises, it is pulled out from the base fabric 11, thus preventing the formation of piles on the base fabric 11.

In this way, the looper is carried by the looper block, which reciprocates toward the axis of the needle, so as to reciprocate in and out toward the axis of the needle, and for each stitch, the looper moves away from the looper block toward the axis of the needle. By determining whether or not to make a reciprocating motion that appears and retracts, it is possible to select whether or not the tip of the looper thread hook will fit into and hook into the pile thread loop carried by the needle, thereby making the pile tufted. The pattern (design/pattern) drawn by the tufted part 9 and the non-tufted part 90 is the tufted fabric 8.
It will be completed.

FIG. 2 shows the second feature of the present invention, and as is clear from the first feature of the present invention shown in FIG. 1, the shape of the looper used is different.

That is, in the second embodiment, a looper with a long threading part protruding from the upper part and a short threading part protruding from the lower part is used, and the piano steel wire and the looper bar are as follows.
The lower short thread hooking section 36 is adjusted to reciprocate toward the axis 2 of the needle 1 in exactly the same way as the thread hooking section 6 in the first embodiment. That is, the reciprocating momentum (distance) of the swinging rod supporting the looper bar 13 is the same as the reciprocating movement (distance) of the swinging rod when the looper bar 13 is closest to the axis 2 of the needle 1 when it is retracted into the looper block 3. The tip of is needle 1
It is adjusted so that the clearance does not reach 29.
When the looper bar 13 is closest to the axis 2 of the needle 1 and the looper is pushed out from the looper block, the length c is also determined by the short thread hooking part 36 at the bottom.
The tip of the needle is large enough to cross over the axis 2 of the needle 1, and when the looper approaches the needle together with the looper block, the lower part is pushed out from the looper block to the needle side by the piano steel wire. The tip of the short thread hooking part 36 fits into the pile yarn loop 5 and hooks it, and on the other hand, when the looper is not pushed out from the looper block 3, the tip of the short thread hook 36 at the bottom fits into the pile yarn loop 5 and hooks it. It is adjusted so that it does not get caught.

However, in the second embodiment, the upper long thread hook 4
6 protrudes longer than the lower thread hooking part 36 by a length d corresponding to the length c of the play gap 29, so even if the piano steel wire 22 does not push out the looper 4 from the looper block 3, the upper thread hook can be moved. The section 46 fits into the pile thread loop 5 and receives it from the needle 1 to form a pile on the base fabric 11. In this way, the pile 30 received and formed by the upper threading part 46 is shorter than the pile 31 received and formed by the lower threading part 36, so that for each stitch, the looper is closer to the axis of the needle than the looper block. The short thread hooking section 3 at the bottom determines whether or not to make a reciprocating motion toward
By selecting whether or not the tip of the needle 6 fits into the pile yarn loop carried by the needle and hooks the pile yarn loop, a pattern based on the height difference of the pile is drawn on the tufted fabric.

The knife 12 shown in FIG. 2 is driven to reciprocate up and down from below the lower edge of the lower thread hooking section 36 to above the lower edge of the upper thread hooking section for each stitch cycle. . In addition, both the illustrated loopers of the first and second embodiments have a jaw piece 32 on the lower side of the tip of the thread hooking part.
This is for cut piles, in which a looper is provided that projects and cooperates with a knife, but the present invention is made by attaching a looper exclusively for loop piles, which does not have jaws, to a tufted machine with the tip of the thread hook pointing in the direction of movement of the base fabric. Therefore, the technical scope of the present invention is not reduced depending on whether the pile is a cut pile or a loop pile.

Also, when trying to implement the present invention by adding height differences to the pile as in the second embodiment,
In accordance with well-known conventional techniques, the amount of pile yarn 10 fed is reduced when a short pile is to be formed at the upper threading section 46, and more when a long pile is to be formed at the lower threading section 36. Needless to say, the amount must be adjusted for each stitch.

FIG. 3 shows a third embodiment of the present invention in which the first embodiment and the second embodiment are combined, or the first embodiment is combined with a conventional tufting technique. Two types of loopers are used: a looper 54 and a looper 64 with a short threading portion.

Similar to the looper 4 of the first embodiment, the looper 64 with a short threading part has a notch at the upper edge of the shank, and is inserted into the slit holes in the front and middle ridges of the looper block 63 and driven by the piano steel wire 22. A gap 2 between the notch 25 and the groove 15 toward the axis 2 of the needle 1
It is attached to the looper block 63 so that it can reciprocate in and out by a length c of 9.

The looper 54, which has a long thread hooking portion, is fixed to the looper block 53 by casting like a conventional looper. This looper block 5
The bottom surface of the looper block 63 has a front groove 15 and a rear groove 1 corresponding to the cover plates 26 and 27 of the first embodiment.
The lower end of the protrusion 52, which fits into the front groove 15 of the looper block 63, protrudes into the notch 25 of the short looper 64 of the looper block 63, and the thread of the piano steel wire 22 The looper block 53 is regulated and controlled so that the reciprocating movement of the looper 64, which has a short hooked part, is only the length c of the play gap 29.The looper block 53 is supported on a swinging rod and is attached to the shaft of the needle, as in the conventional Tufftet machine. The looper block 63 is mounted on the looper bar 13 that reciprocates toward the core, and the looper 54, which has a long threading section, is supported by a looper 54 that is attached to the tip 5 of the threading section.
7 is reciprocated back and forth by the looper bar 13 so that it is inserted into the pile yarn loop 5 of the needle 1 for each stitch cycle.

The length of the looper 64 having a short threading portion is such that when the looper bar 13 is retracted into the looper block 63 when it is closest to the axis 2 of the needle 1, the tip 67 of the threading portion is close to the needle 1. not reached,
When the looper bar 13 comes closest to the axis 2 side of the needle 1, when it is pushed forward by the length c of the play gap 29 from the looper block 63 by the piano steel wire 22, the tip 67 of the thread hook reaches the needle 1. The length is such that it fits into the pile yarn loop 5. In other words, when the looper 64 is retracted into the looper block 63, the end 67 of the threading part of the looper 64 with a short threading part is longer than the end 57 of the threading part of the looper 54 with a long threading part, by the length c of the clearance 29. distance f corresponding to
is only retreating.

As a result, as in the second embodiment,
When the short looper 64 of the threading part is not driven by the piano steel wire, the long looper 54 of the threading part receives the pile yarn loop 5 to form a short pile 31 on the base fabric, and the thread is threaded by the piano steel wire. When the looper 64 with a short hooking section is driven, the looper 54 with a long hooking section and the looper 54 with a long hooking section both fit into the pile yarn loop 5, but the pile yarn loop 5 is a looper with a short hooking section. 64 and the knife 12, a long pile 30 is formed in the base fabric, and in this way, a short looper 64 at the threading part is cut by the piano steel wire 22 at each stitch cycle. The looper block 63 determines whether or not to make a reciprocating motion toward the axis of the needle, and its tip 67 is connected to the pile yarn loop 5 through which the needle passes.
By selecting whether or not to fit into the pile and hang it, a pattern based on the height difference of the pile is drawn on the tufted fabric.

As is clear from this, according to the present invention, the looper 4 (64) is attached to the looper block 3 (63) that reciprocates toward the axis 2 of the needle 1, and the looper reciprocates from the looper block toward the axis of the needle. For each stitch, it is determined whether or not the looper makes a reciprocating motion from the looper block toward the axis of the needle, and this reciprocating motion causes the tip of the threading part of the looper to pass through the needle. By selecting whether or not to fit into the pile yarn loop 5 and hang it, patterns based on the presence or absence of piles and height differences are drawn on the tufted fabric.
Moreover, since it uses a tufted machine with a large number of needles and loopers arranged in the width direction, productivity is high and convenient.

[Brief explanation of the drawing]

Fig. 1 is a local cross-sectional side view of a tufted machine equipped with a looper that cooperates with the needle and a knife that cooperates with the looper arranged in the width direction of the machine according to the first embodiment, and Fig. 2 shows the second embodiment. FIG. 2 is a local cross-sectional side view of a tufted machine in which a looper that cooperates with a needle and a knife that cooperates with the looper are arranged and installed in the width direction of the machine. FIG. 3 is a partially sectional side view of a tufted machine according to the present invention. 1...needle, 2...shaft, 3...looper block, 4...looper, 5...pile thread loop, 6...threading part, 7...tip of threading part of looper, 8... Tufted fabric, 9...Pile, 10...
Pile yarn, 11...Base fabric, 12...Knife, 13
...Looper bar, 14, 15...groove, 16...
Front ridge, 17...Middle ridge, 18...Shank, 19,
20...Slit hole, 21...Back ridge, 22...Piano steel wire, 23...Through hole, 24...Pipe, 25...
... Notch, 26, 27 ... Lid plate, 28 ... Convex part, 2
9...Gap, 32...Jaw piece.

Claims (1)

[Scope of Claims] 1 (a) A tufting machine comprising a knife 12 for shearing a pile yarn loop 5 in cooperation with a looper 4 (54, 64), (b) a reciprocating motion toward the needle axis 2; (c) The looper 4 (54, 64) is supported on the looper bar 13 (c) The thread hooking portion for hooking the pile yarn loop 5 of the looper 4 (54, 64) is the uppermost thread hooking portion 46.
(54) and the lowest threading section 36 (64); (d) At least the lowest threading section 36 (64) of the upper and lower threading sections is connected to the looper bar. A tufted machine characterized by being capable of reciprocating movement from 13 toward a needle axis 2.