JPH0635703B2 - Tufting method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tufting method for forming piles by piercing a pile fabric with a pile thread, and more particularly to a tufting method for forming an uneven pattern by short cut piles and long cut piles. Is.

[Conventional technology]

The cut pile looper is reciprocally driven by reciprocating the looper bar toward the needle and selectively pushed back toward the needle to pull it back and forth. A tufting method of forming a loop pile when crossed and thereby forming a desired pattern is U.S. Pat. No. 4466366, West German Patent 3303206, British Patent 2115025, JP-A-58-144162, JP-A-59-21.
It is disclosed in No. 768 and put into practical use.

Based on this known technique, the present inventor arranges the looper that does not appear and disappear from the looper bar on the upper side and the looper that appears and disappears from the looper bar on the lower side, and if the lower looper is not pushed out, the upper looper is piled. When the looper on the lower side is pushed out when the looper on the lower side is pushed out, the looper on the lower side receives the pile loop and the unevenness due to the long cut pile and the short cut pile due to the difference in distance between the upper and lower loopers from the base fabric. A method for forming a pattern was invented and disclosed in Japanese Patent Laid-Open No. 59-179862.

[Problems to be solved by the invention]

The vertical width of the pile thread locking rod of the cut pile looper is 3
If the two pile thread locking rods are to be placed one above the other as disclosed in Japanese Patent Laid-Open No. 59-179862, the pile thread loops locked by the upper looper are piled up and down. A clearance of at least about 2 mm must be provided between them so that they cannot be gripped between the thread locking rods.

Therefore, the length difference between the long cut pile and the short cut pile according to this known technique is at least about 5 mm, and it is difficult to reduce the length difference to about 2 to 3 mm.

Further, it is difficult to mount the looper that appears and disappears from the looper bar and the looper that does not appear on the looper bar on the looper bar in terms of mounting space.

[Object of the Invention]

Therefore, a first object of the present invention is to simply form a concavo-convex pattern by a long cut pile and a short cut pile whose length difference is 5 mm or less and becomes 1 to 2 mm.

A second object of the present invention is to form a more complicated uneven pattern by using cut piles and loop piles having different lengths.

[Structure of Invention]

The present invention achieves the above object, and a cut pile looper in which a lower edge 21 of a pipe-type locking rod portion 13 is a cutting edge 22.
The cutting edge 22 of 11 is formed by changing the distance (height) from the base cloth 20 to the high portion 16 and the low portion 17 in at least two steps.
Is selectively reciprocated (push-pull back) from the looper bar 48 that reciprocates toward the needle 12 toward the needle, whereby the position of the cutting edge that cooperates with the knife 18 is set to the high part 16 and the low part 17. Selectively change to pile yarn loop 10
It is characterized by shearing and tufting the cut pile.

The present invention will be described below with reference to the drawings. FIGS. 1 to 3 show a basic embodiment of the present invention, and a cup pile looper 11 is manufactured by the method disclosed in Japanese Patent Laid-Open No. 59-21768. It is adapted to be extruded from the looper block toward the needle 12 in three steps.

Below the tip of the pile thread locking rod portion 13, a beak 15 having a slobe 14 with its tip facing upward is projected. In the pile thread locking rod portion, a high portion 16 and a low portion 17 are divided into steps, and cutting edges 21, 22 are formed on the lower ridge of the surface facing the knife 18 (front side in the figure).
Is attached. Cut pile of looper block Extrusion amount (distance) of looper is not extruded.
Cross over the needle 12 at the position (Fig. 1), and when it is pushed out weakly, the needle is raised at the high end 16 of the pile thread locking rod.
12 (Fig. 2), and when it is pushed out strongly, it crosses the needle 12 at the lower part behind the pile thread locking rod (3rd Fig. 3).
(Fig.) The knife 18 only moves up and down like a conventional general tufted machine, and does not move back and forth according to the pushing amount of the cut pile looper from the looper block.

The tip side of the cutting edge 19 of the knife 18 intersects with the cutting edge 21 at the high portion (Figs. 1 and 2) when the cut pile looper is not extruded or is extruded weakly (Figs. 1 and 2), and When the pile looper is strongly pushed out, it intersects with the lower cutting edge 22 (Fig. 3) to shear the pile yarn loops stopped by the pile yarn locking rods.

[Work]

Since the cut pile looper is configured and driven as described above, when it is pushed out weakly, the pile thread loop 10 is hooked on the high portion 16 of the pile thread locking rod portion and is sheared there. A long cut pile 23 having a length equal to the distance to the cutting edge 21 of the part is formed.

On the other hand, when the cut pile looper is strongly pushed out, the pile thread loop 10 is hooked on the lower portion 17 of the pile thread locking rod portion and is sheared there, so it is equal to the distance from the base cloth 20 to the lower cutting edge 22. A cut pile of short length is formed.

That is, the distance from the base cloth 20 to the cutting blade 21 of the needle and the cutting blade 22 of the lower portion is different by the amount of the step difference between the high portion 16 and the low portion 17, so that the cutting blade 21 of the high portion can cut that much. The pile (23) is longer than the cut pile (24) formed by the lower cutting edge (22), and an uneven pattern due to the height difference between these cut piles (23) and (24) is formed on the cut pile surface.

Although hooking the pile thread loop with the slope 14 shown in FIG. 1 is not an essential element of the present invention, in this case, the pile thread loop is cut from the cut pile looper as disclosed in JP-A-59-21768. It escapes and a long loop pile 25 or a short loop pile 26 is formed depending on the tension applied to the pile yarn at that time.

〔The invention's effect〕

Therefore, as is apparent, the length difference between the two types of cut piles formed by the present invention corresponds to the height difference between the high portion 16 and the low portion 17, and this height difference is 5 mm or less and 1 to 2 mm. Therefore, it is possible to form a concavo-convex pattern by a long cut pile and a short cut pile with little difference in length.

Further, in the present invention, as disclosed in JP-A-59-179862, an uneven pattern can be formed on the cut pile surface without attaching the two kinds of pile-type locking rod parts toward the needles. 59-2176
By controlling the engagement and disengagement of the pile yarn loop from the cut pile looper as shown in No. 8, various piles such as long cut pile, short cut pile, long loop pile and short loop pile are combined to create a complicated pattern. It can be easily formed, and thus the present invention is extremely convenient.

[Mode for Carrying Out the Invention]

The above effect is that the distance (height) of the cutting blade 22 of the cut pile looper 11 with the lower edge 21 of the pile thread locking rod portion 13 as the cutting blade 22 from the base cloth 20 is increased to at least two steps. And the lower part 17 instead of the lower part 17, and the looper 11 is selectively reciprocated (pushed out and pulled back) toward the needle from the looper bar 48 that reciprocates toward the needle 12. In that regard, the form of the cut pile looper can be modified and implemented as follows.

FIGS. 5 to 8 show a cut pile looper shown in FIGS. 1 to 3 in which the tip of the pile thread locking rod is a high portion and the rear is a low portion. In Fig. 5 and Fig. 6, a claw 27 is projected downward at the rear end of the needle so that the pile thread loop locked to the high part 16 does not slip into the lower part.
Particularly, in the cut pile looper shown in FIG. 6, a recess 28 is provided as a play so that the pile yarn loop locked at the lower portion is not rubbed against the higher portion. In the cut pile looper shown in FIG. 7, a hook 29 is pressed against the rear end of the needle instead of the claw 27. The cut pile looper shown in Fig. 8 is used when the difference in length between cut piles with different pile lengths is extremely small, around 1 mm. There is almost no difference in height between the lower part and the higher part, and the slope 30 is used. .

In the above-mentioned cut pile looper, the tip of the pile thread locking rod portion is a high portion and the rear portion is a low portion.However, in the present invention, the tip of the pile yarn locking rod portion is a low portion and the rear portion is a high portion. Good.

That is, FIG. 9 is shown in FIGS. 1 to 3, FIG. 10 is shown in FIG.
Fig. 11 shows Fig. 6, Fig. 12 shows Fig. 7 and Fig. 13 shows cut pile loopers corresponding to Fig. 8, respectively, with the tip of the pile thread locking rod being lowered to the rear. It is a high part.

〔Example〕

FIG. 14 illustrates a cross-sectional side surface of a main part of the lifted machine. First, the movement of the needle 12 will be described.

The needle movement 31 is a push rod slidably mounted on the frame 32 so as to be perpendicular to the conveying surface of the base fabric 20, and is linked to a swinging rod fixed to the needle shaft via a connecting rod. . A needle bar 33 having a generally isosceles trapezoidal cross section extending in the machine width direction is fixed to the lower side of the push rod 31.

The needle bar is provided with a large number of a pair of front and rear slits 34 having a narrow width and having center lines intersecting with each other in the front-rear direction at a constant interval in the machine width direction of the needle bar. A carrier piece 35 and a connecting piece 36, which are slidably adhered to the inner surface, are fitted into the respective slit holes 34. Connecting piece
A dovetail groove 37 is attached to the lower end of 36. A tongue piece 28 that fits into the dovetail groove 37 projects from the upper end of the carrying piece 35. The connecting piece 36 and the carrying piece 35 are joined by fitting the tongue piece 35 into the dovetail groove 37.

The needle 12 is planted downward in the carrier piece 35. The protruding tip of the needle is bent and parallel to the axis of the push rod 31.

A step 39 is formed at the front and rear of the central portion of the carrying piece 35, and the lower half portion is slightly narrow. The upper part of the connecting piece 36 is joined to the piano steel wire 40. The upper end of the slit hole 34 is closed by a lid member 42 having a hole 41 through which the piano steel wire 40 can slide.

The lower end of the slit hole 34 is closed by a lid member 45 having a slit hole 43 through which the lower half of the carrying piece 35 can slide. The upper and lower lid members 42 and 45 are screwed to the needle 33, respectively.

In this way, the needle 12 is gripped by the carrying piece 35 and the connecting piece 36, and is raised until the connecting piece 36 contacts the upper lid member 42 by the piano chain line, and the step 39 of the carrying piece 35 contacts the lower lid member 45. It is driven up and down so as to descend and emerges from the needle 33. Then, the needle tip portion 12 is positioned so as to coincide with the center line of the push rod when it is lowered.

An air cylinder is installed above the frame box that houses the drive unit of the push rod 31, and a pair of front and rear piano steel wires 40A and 40B are joined to the front and rear of the drive head in the air cylinder, respectively. Piano steel wire
The part from the top cover material 41 to the air cylinder frame head of 40 is the top cover material 41 and the air cylinder frame.
It is covered by a pipe 46 joined to the head.

When the needle 12 is pulled up into the needle bar 33 by the piano steel wire 40, even if the push rod 31 pushes down the needle bar 33, the needle 12 is not inserted into the base cloth. When the piano steel wire 40 pushes the needle 12 downward from the needle bar 33, the push rod 31
When pushing down the needle 33, the needle 12
Is to be inserted into the base cloth.

When the needle 12 is inserted into the base cloth, the tip of the cut pile looper 11 fits into the pile thread loop 10 formed at the tip and grips this, and then the cut pile looper 11 and the knife 18 form this pile thread loop. 10 is sheared so that a cut pile can be formed.

The air cylinder selects which one of the pair of needles 12A and 12B is to be pushed out at each tufting cycle (stitch cycle). In this case, one needle 12A can be continuously extruded over several tufting cycles. This determination is performed when the needle previously selected and inserted into the backing begins to lift while delivering the pile yarn loop to the looper.

Therefore, the decision to insert needle 12A into the backing on the other needle 12B in the next tufting cycle in which needle 12A is inserted into the backing is because needle 12A is driven by push rod 31 together with needle bar 33 to exit the backing. It is executed when it starts to rise. That is, needle 12A
Moves upward together with the needle bar, and along with it, performs an upward motion added so that it is pulled back into the slit hole by the piano steel wire, and when the needle bar reaches the maximum raised position, the needle 12A moves into the slit hole. Has been pulled back.

On the other hand, the needle 12B moves upward together with the needle bar outside the base cloth, but when the needle bar reaches the maximum lift position by performing the upward motion added so as to be pushed out from the slit hole by the piano steel wire, The needle 12B has been pushed out from the slit hole 34B. Then, as the needle 33 descends in the subsequent tufting cycle, the needle 12B is inserted into the base fabric 20 and the pile is planted again.

Thus, the pair of needles 12A by the air cylinder
And 12B to be inserted into the base cloth, and
47A and 47B form a color-coded pattern.

When the needle is not inserted into the base cloth and therefore the pile is not planted, the supply amount of the pile yarn of the needle is reduced as compared with the case where the pile is planted. That is, the supply amount of the pile yarn when the pile is not planted is set to the same length as the supply amount of the base fabric per stitch. Such a change in the pile yarn supply amount is well known in the U.S. Pat. No. 2862465, U.S. Pat.No. 2935037, U.S. Pat. This is done by a conventional pile feed roll transmission.

Movement of Looper The cut pile looper is slidably inserted into the looper block 50 toward the needle 12 in a plurality of slit holes 49 formed at regular intervals in the machine width direction. Reference numeral 48 is a looper bar that carries the looper block 50 and reciprocally swings in the direction of the needle.

A mechanism communicating with the slit hole 49 is provided on the upper side of the looper block, and is closed by a lid member 51. The lower end of the lid member 51 projects into the slit hole 49. There is a notch 53 on the upper side of the looper shank 52, and the lower end of the lid material 51 is loosely fitted therein, so that the looper has a gap formed horizontally between the notch 53 and the lid material 51. It can slide so as to be pushed out and retracted from the looper block in the direction of the needle 12 by a corresponding amount.

Behind the looper shank 52, there is a slidable hole 55 for the piano steel wire 54 in the looper block, and one end of the piano steel wire 54 driven by a cam is inserted. This one end is connected to the rear end of the looper shank 52 via a connecting piece 56.

Then, the looper 11 is repeatedly driven toward the needle 12 by the swinging movement of the looper block 50 and the pushing-out and retracting movement by the cam through the piano steel wire 54.

A beak 15 having a slope 14 with its tip facing upward is projected below the tip of the pile thread locking rod portion 13 of the cut pile looper 11. The pile thread locking rod is divided into a high portion 16 and a low portion 17 in a stepwise manner, and a cutting edge is formed on the lower ridge of the surface facing the knife 18.
21 and 22 are attached.

The amount (distance) of the cut pile looper extruded from the looper block 50 is not extruded but is simply carried by the looper bar 48 and when reciprocating, it crosses the needle 12 at the position of the slope 14 at the tip and is extruded weakly from the looper block 50. When it is pushed out, the needle 12 crosses the needle 12 at the tip high part 16 of the pile thread locking rod part, and when it is strongly pushed out from the looper block 50, the needle at the lower part behind the pile thread locking rod part.
It is adjusted by a cam through a piano steel wire 54 so as to intersect with 12.

The knife 18 only moves up and down, and does not move back and forth according to the amount of extrusion from the looper block of the cut pile looper.

In this way, when the cut pile looper is not pushed out from the looper block 50 but simply carried on the looper bar 48 and reciprocates, the pile thread loop locked to the slope 14 at the time of retreating comes out from the cut pile looper, and at that time. A long loop pile 25 or a short loop pile 26 is formed depending on the tension applied to the pile yarn.

Then, when the cut Pal looper is weakly pushed out from the looper block 50, the pile thread loop 10 is hooked on the high portion 16 of the pile thread locking rod portion and sheared there,
A cut pile 23 having a length equal to the distance from the base cloth 20 to the cutting edge 21 at the high portion is formed.

On the other hand, when the cut pile looper is strongly pushed out, the pile thread loop 10 is hooked on the lower portion 17 of the pile thread locking rod portion and sheared there, so that it is equal to the distance from the base cloth 20 to the lower cutting edge 22. A cut pile of short length is formed.

Thus, needles 12A and 12B allow pile threads 47A and 47
Is the color coded as B, and the cut pile looper's high part 16 and low part 17 are provided with the unevenness of the long cut pile 23 and the short cut pile 24, and also the cut pile looper 11 is extruded from the looper block 50? Depending on whether or not the pile pile is divided into the cut piles 23 and 24 and the loop piles 25 and 26, the long loop pile 25 and the short loop pile 26 according to the change in the supply amount of the pile yarn 47 to the needle 12 are further divided. The uneven tufts are added, and thus the pile tuft, the length of the pile, and the form of the pile are changed to obtain a tufted carpet with a rich variety of colors.

[Brief description of drawings]

FIGS. 1, 2 and 3 are side views of essential parts at tufting points of a tufted machine, and FIG. 4 is a partial sectional side view of a tufted carpet according to the present invention, FIGS.
FIG. 7, FIG. 8, FIG. 9, FIG. 10, FIG. 10, FIG. 11, FIG. 12 and FIG. 13 are partial side views of the cut pile looper used in the present invention, and FIG. It is a principal part cross-sectional side view of the tufted machine in the Example of this invention. 10 …… Pile thread loop, 11 …… Cut pile looper, 12 …… Needle, 13 …… Pile thread locking rod section, 14 …… Slope, 15 …… Beak, 16 …… High section, 17 …… Low section , 18 ... knife, 19 ... cutting edge, 20 ... base cloth, 21 ... lower edge, 22 ... cutting edge, 23 ... cut pile, 24 ... cut pile, 25 ... loop pile, 26 …… Loop pile, 27 …… Claw, 28 …… Dimple, 29 …… Hook, 30 …… Slope, 31 …… Push rod, 32 …… Frame, 33 …… Needle bar, 34 …… Slit hole, 35… … Carrying piece, 36 …… Connecting piece, 37 …… Step, 38 …… Tongue piece, 39 …… Dovetail groove, 40 …… Piano steel wire, 41 …… Hole, 42 …… Lid material, 43 …… Slit hole , 45 …… Lid material, 46 …… Pipe, 47 …… Pile thread, 48 …… Looper bar, 49 …… Slit hole, 50 …… Looper block, 57 …… Lid material, 52 …… Shank, 53 …… Cutout, 54 …… Piano steel wire, 55 …… hole, 56 …… connecting piece.

Claims (1)

[Claims] 1. A distance (height) from the base cloth 20 to the cutting edge 22 of the cut pile looper 11 in which the lower edge 21 of the pile thread locking rod portion 13 is the cutting edge 22 is at least two high parts. 16 and the lower part 17 are formed in a different manner, and the looper 11 is selectively reciprocated (pushed out and pulled back) toward the needle from the looper bar 48 that reciprocates toward the needle 12, thereby causing the knife.
A tufting method characterized in that the position of a cutting edge cooperating with 18 is selectively changed to a high part 16 and a low part 17 to shear a pile yarn loop 10 to form a cut pile.