JPH07109052B2 - Tufting machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tufting machine for producing a tufted carpet having a cut pile formed on a base cloth.

[0002]

2. Description of the Related Art There is a known example of a tufting machine for manufacturing a tufted carpet by forming a cut pile (having pile tips cut) on a base cloth, and this known example is shown in FIG. ), The needle 1 that moves up and down through the pile thread 4 through the thread hole 7 at the tip, and the needle 1
A needle unit 9 for forming a cut pile, which is a combination of a plate-shaped looper 2 that is provided below the needle 1 and moves back and forth in a direction orthogonal to the needle 1, and a cut knife 3 that vertically moves along the side surface of the looper 2, It is a part.

Then, the needle 1 is penetrated through the base cloth 5 passing between the needle 1 and the looper 2, and the needle cloth 1 is moved up and down by one stroke.
The pile hook 4 of the forwarded looper 2 is wound around and locked on the pile thread 4 that has come out to the lower side, and the winding of the pile hook 4 is performed by winding the pile thread 4 3 to 4 times. Degree (needle 1
3 to 4 strokes), and then the last one of the winding is cut by the raised cutting knife 3 to sequentially form the cut pile 6 on the base cloth 5. Then, as shown in FIG. 6B, the needle units 9 are arranged side by side in the width direction of the base cloth 5 and are sequentially fed below the needles 1 in the direction perpendicular to the paper surface. It has a structure in which a cut pile 6 forming a continuous line is formed.

[0004]

In the conventional tufting machine described above, the pile yarn 4 hooked on the looper 2 is immediately cut by the cutting knife 3 without winding the pile yarn 4 around the looper 2 three to four times. When cut, the cutting end 4A on the needle 1 side, which is to be cut and becomes the next pile
Rises in conjunction with the needle 1, is pulled back by receiving the pulling force of the pile yarn 4 on the supply side, or causes a defect phenomenon that the pile yarn 4 comes out of the yarn hole 7. By wrapping four times, the posture and shape of the pile yarn 4 protruding from the base cloth 5 can be stabilized, and the cut pile 6 having a normal shape and size can be formed.

Therefore, while the cut pile 6 is formed on the base cloth 5, the needle 1 and the looper 2 are always connected to each other through the pile thread 4, so that a continuous line is formed in the forward direction of the base cloth 5. Even if you try to change the color of the middle of the cut pile 6,
Since the needle unit 9 cannot be replaced, the cut pile 6 having the same line is limited to the same color, and only a simple line pattern of only the line color change of the cut pile 6 can be formed on the tufted carpet. There is a problem that various patterns that are rich in color change cannot be formed.

Further, the above-mentioned known tufting machine is characterized by arranging the needle units 9 side by side in the width of the base cloth 5 of the carpet to be manufactured. For Ted carpet,
The number of needle units 9 becomes extremely large, such as 130, and the entire device including the pile yarn supplying device for individually supplying the pile yarn 4 to the needles 1 becomes extremely large and extremely expensive. Therefore, there is a problem in securing a space to be installed and a problem that the spread is hindered by the cost limitation. The present invention provides a toughening machine that solves the above-mentioned drawbacks of the prior art.

[0007]

The tufting machine of the present invention for solving the above technical problems is described as follows: "A needle that passes a pile thread through a thread hole and operates up and down from above the base cloth;
A looper that is provided below the base cloth and that moves forward and backward in a direction substantially perpendicular to the needle and that winds down the pile thread of the needle, and a looper, and a looper that is wound around the thread locking hook. In a tufting machine whose main part is a combination of cutting knives that cut the lower end of pile yarn,
A yarn carrier mechanism that feeds the pile yarn in a fixed amount in conjunction with the lowering operation of the needle, and a yarn temporary lock that temporarily pushes the needle-side pile yarn wound around the looper to the side of the looper to temporarily lock the pile yarn. A mechanism is provided to form a cut pile forming unit by combining the needle, looper and cutting knife, and the cut pile forming units are arranged in series to form a cut pile forming unit to form a required number of groups,
The structure in which the cut pile forming portion is relatively advanced in the series direction on the base cloth to selectively operate the cut pile forming unit to form a streak cut pile on the base cloth " Is.

A plurality of the cut pile forming portions are arranged in series as a change in the toughening machine whose main portion is the cut pile forming portion composed of the above-mentioned group of cut pile forming units to form a single base cloth. There may be a structure in which a plurality of cut pile forming parts are simultaneously interlocked with each other.

Further, the thread carrier mechanism described above includes: "a carrier plate having a pile thread hole into which a pile thread is loosely fitted, and having an operating mechanism for vertically moving a required stroke in conjunction with a needle; and a carrier plate above the carrier plate. It has a top dead center operating cam provided on the frame side at the dead center position, and a bottom dead center operating cam provided on the frame side at the bottom dead center position of the carrier plate, and a fulcrum is pivotally supported on the carrier plate. Locks that are piled up and overlapped with each other, and are arranged to face each other by engaging the locking claws at the tips of the piles, and the pile thread hole is held in the closed position or the open position by the primary and secondary engagements of the locking claws. A carrier plate and a mechanical mechanism using the cam, which is provided with a plate and engages with the top dead center actuating cam to have the closed posture and engages with the bottom dead center actuating cam to have the open posture. Yes or no, by "Air Chuck Clamping the yl yarn, air utilization structure strokes feed in synchronism with the lowering operation of the needle "
Those etc. are adopted.

Further, the above-mentioned temporary thread locking mechanism is constructed such that "a pressing spring for receiving a needle from the tip and sandwiching the needle is attached to the side surface of the thread locking hook of the looper, and the needle side cut by the pressing spring is attached. The "pressing spring structure for pressing in and temporarily locking the pile thread" or the "air utilization structure" for pressing down the pile thread by the mini air cylinder attached to the side surface of the looper is adopted.

[0011]

In the tufting machine of the present invention having the above construction, the cut pile forming unit having the thread carrier mechanism and the thread temporary locking mechanism constitutes the main unit.
The pile yarn is fed in a fixed amount in a required amount in conjunction with the descending operation of the needle, and the cut end on the needle side cut around the looper is pressed into the looper and temporarily locked. That is, at the cutting end of the pile yarn on the needle side that becomes the next cut pile, the needle is raised and returned, and it is lowered to the next cut pile forming and locked and held on the side of the looper until the pile yarn is wound around the looper. Therefore, it is not necessary to wind the pile yarn around the yarn hooking hook of the looper several times, and the first wrapped pile yarn can be immediately cut by the cutting knife. Then, if the pile thread in the temporarily locked state is given a locking force that does not easily shift the position even if it receives thread tension on the thread supply side and resistance of the needle to rise, the first winding is immediately cut. Even if it does, there is no possibility that the pile shape defect such as the length of the cut pile becomes uneven, and the cut pile having the normal shape can be formed.

Then, the cut pile forming section in which the cut pile forming units having the above-mentioned operations are arranged in series as a group is relatively moved on the base cloth in the series direction, and only one of the units in the group is selected. Acts to form a single streak cut pile. Therefore, if the pile yarns of the cut pile forming unit of the group are classified by color and the pile yarn units of the different colors are alternately operated in a predetermined order, intermediate discoloration of the cut piles of the same streak is possible. , By the collection of streak-cut piles with intermediate discoloration,
It is possible to freely form various patterns rich in color change.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A tufting machine according to an embodiment of the present invention will be described with reference to the drawings. That is, referring to FIG. 1, the pile thread 4 is passed through the through hole 7 and penetrates the base fabric 5 from the upper side to the lower side to move up and down, and the needle 1 moves forward and backward in a direction substantially orthogonal to the needle 1 and descends. Pile yarn 4 of needle 1
A toughening machine that forms a cut pile 6 on a base cloth 5 by using a looper 2 wound around a thread locking hook 8 at the tip and a cutting knife 3 that cuts the lower end of a pile thread 4 wound around the looper 2 as main parts. 2, the yarn carrier mechanism 10 that feeds the pile yarn 4 in a fixed amount in conjunction with the descending operation of the needle 1 and the cut end 4A of the pile yarn 4 on the needle 1 side wound around the looper 2 are temporarily pressed against the looper 2. A temporary thread locking mechanism 11 for locking is provided, and the needle 1, the looper 2, the cutting knife 3, the thread carrier mechanism 10, and the temporary thread locking mechanism 11 are combined to form a cut pile forming unit 13, and this cut pile is formed. A plurality of units 13 (four units 13A, 13B, 13C, and 13D in the figure) are arranged in parallel to form a cut pile forming portion 15.

More specifically, the thread carrier mechanism 10 has a pile thread hole 22 in which the pile thread 4 is loosely fitted, is connected to a crank arm 17 on the frame side, and is fitted to the spindle 16 of the needle 1, as shown in FIG. A pair of locks that are guided together and that move up and down in conjunction with the needle 1 form a main part, are superposed on the carrier plate 18, are pivotally supported at a fulcrum 21, and are rotatably engaged. Board 19A
19B and the top dead center position 18A of the carrier plate 18,
A conical upper operating cam 24 on the frame side that locks the lock plates 19A and 19B, and a lower conical operating cam 25 on the frame side that opens the lock plates 19A and 19B at the bottom dead center position 18B of the carrier plate 18. The main part is composed of.

The lock plates 19A and 19B are arranged such that the hook-shaped two-step engaging claws 20 at the front ends of the lock plates 19A and 19B face each other, and as shown in FIG. The lock plate 19A closes the pile thread hole 22 during the primary engagement, and the lock plate 19A opens the pile thread hole 22 during the secondary engagement of the locking claw 20 as shown in FIG. 2C. It is like this. And this lock plate 19A
.19B, when the carrier plate 18 reaches the top dead center position 18A, the top dead center cam 24 engages with the lock plate 19B,
When the lock plate 19A makes a primary meshing inclining to the pile thread hole 22 side and the carrier plate 18 reaches the bottom dead center position 18B, the bottom dead center cam 25 engages with the lock plate 19A to cause the secondary meshing. It is the cam plate on the driven side.

The vertical stroke L of the carrier plate 18 is set to be slightly larger than the feed amount of the pile yarn 4 by one stroke up and down of the needle 1, and when the needle 1 descends, the pile yarn due to the primary meshing described above. By closing the hole 22, as shown in FIG. 2B, the pile yarn 4 in the pile yarn hole 22 is sandwiched and locked, and the stroke L is forcibly fed. Then, the carrier plate 18 is at the bottom dead center 18B.
Then, the above-mentioned secondary meshing occurs, resulting in (C) of FIG.
As described above, the pile thread hole 22 is opened to free the pile thread 4, and the pile thread 4 is returned to the top dead center 18A as it is. Reference numeral 23 in the figure is a biasing spring of the rod plates 19A and 19B.
When the yarn carrier mechanism 10 feeds the pile yarn 4 slightly more than the amount required for one stroke of the needle 1, the remaining pile yarn 4 is released by the carrier plate 18 when it is raised. Since it is pulled back by the light pulling force on the supply side, the surplus does not accumulate.

On the other hand, the temporary thread locking mechanism 11 is shown in FIG. 3, and the pressing spring 27 is a "leaf spring" attached to one side surface of the looper 2.
At the upper end of the pressing spring 27, there is a pressing portion 28 extending in the insertion direction of the needle 1 and having a needle guide piece 29 at the tip. 1B, and when the looper 2 advances with respect to the lowered needle 1, the needle 1 guided by the needle guide piece 29 enters between the presser spring 27 and the looper 2 as shown by the solid line in the figure. hand,
When the needle 1 is lifted in this state by pressing it by the pressing portion 28, the pile thread 4A on the needle 1 side cut by the cut knife 3 is pressed and locked by the pressing portion 28 as it is and lowered for the next pile formation. The structure is such that the locking is maintained until the needle 1 is re-entered.

In the above tufting machine, an operating program for sequentially operating the cut pile forming units 13A to 13D of the cut pile forming unit 15 in accordance with the color pattern to be formed by the cut pile is provided in the control unit. Input to and used as follows. That is, refer to FIG. 1 (A). On the base cloth 5 in which four cut pile forming units 13A to 13D are attached with pile yarns of different colors and the cut pile forming portion 15 is expanded and fixed to the base portion. By moving in the direction of the arrow X in the figure to automatically and selectively operate by the operation program described above.
The cut pile 6 is formed in a streak on the base cloth 5. When the formation of the streaks is completed, the base cloth 5 is shifted by one pitch of the cut pile 6, and the cut piles having the same streak are sequentially formed, and the tufted carpet of the cut piles having various patterns by various color combinations is formed. To manufacture.

The tufting machine of the above embodiment is
With the above-mentioned action, the cut pile forming unit 13A to
By selectively operating 13D, it is possible to change the color of the cut pile of the same line by changing the intermediate color, so the cut pile made up of a large number of cut pile lines makes it colorful and shows various patterns. Tufted carpets can be automatically woven. Furthermore, the cut pile forming units 13A to 13D are temporarily stopped in the middle of movement on the base fabric to intentionally form a portion where the cut pile is not present, or the cut pile forming units 13A to 13D reduce the cut pile length. By making a combination of long and short, it is possible to freely woven a mixture of long cut pile and short cut pile on the same base fabric.

Next, another embodiment of the present invention will be described with reference to FIGS. That is, FIG. 3 shows a temporary thread locking mechanism 11 composed of a “spring” presser spring 27, and FIG. 4 is provided with a plurality of cut pile forming portions 15A and 15B mounted on a common feed rod 30. Things are shown. And
The cut pile forming portions 15A and 15B are simultaneously operated to share the front half portion 5A and the rear half portion 5B of the base cloth 5 to form a cut pile.

[0021]

As described above, since the tufting machine of the present invention can change the intermediate color of the cut pile of the same line, it is possible to obtain a high-quality pattern carpet that shows various patterns due to color changes in the cut pile. It is automatically woven and provided at low cost, and the long and short cut piles mentioned above are formed on the upper surface of the same base cloth, and the carpet with a novel structure in which the cut piles are partially absent is also automatically woven. Can be provided. Furthermore, a tufting machine can be constructed by installing cut pile forming units of a number of colors arranged in series in the cut pile streak direction, so needle units of the number of cut pile streak in the width direction of the base cloth are arranged in parallel. Compared to the conventional structure, the entire device is particularly small and compact, and the space required for installing the toughening machine is also particularly small, so the device cost is reduced and the practicality is improved.
The space problem for installation can be alleviated and the toughening machine can be promoted further. There are various effects described above.

[Brief description of drawings]

FIG. 1 shows a cut pile forming portion of a tufting machine according to an embodiment of the present invention, in which (A) is a front view and (B) is a partially enlarged front view showing its operating state.

2A and 2B show the thread carrier mechanism of the embodiment of FIG. 1, in which (A) is a front view thereof, and (B) and (C) are plan views showing its operating state.

3A and 3B show a temporary thread locking mechanism of the embodiment of FIG. 1, in which FIG. 3A is a front view thereof, and FIG. 3B is a plan view thereof.

4A and 4B show a temporary thread locking mechanism of another embodiment of the present invention, in which FIG. 4A is a front view thereof, and FIG. 4B is a plan view thereof.

FIG. 5 is a front view showing a mounted state of a cut pile forming portion according to another embodiment of the present invention.

FIG. 6 shows a needle unit of a tufting machine having a conventional structure, in which (A) is an explanatory view of its operation and (B) is a front view showing its arrangement.

[Explanation of symbols]

 1 Needle 2 Looper 3 Cut knife 4 Pile thread 5 Base cloth 6 Cut pile 7 Thread hole 8 Thread locking hook 10 Thread carrier mechanism 11 Thread temporary locking mechanism 13 Cut pile forming unit 15 Cut pile forming unit 16 Spindle 17 Crank arm 18 Carrier plate 19A / 19B Lock plate 20 Locking claw 21 Support point 22 Pile thread hole 24 Upper fulcrum cam 25 Lower fulcrum cam 27 Presser spring 28 Presser part 29 Needle guide piece

Claims (3)

[Claims] 1. A needle for moving a pile thread up and down from the upper side of a base cloth by passing the pile thread through the thread hole, and a needle provided below the base cloth for advancing and retracting in a direction substantially orthogonal to the needle, and
In a tufting machine whose main part is a combination of a looper having a thread locking hook that winds down the pile thread of the lowered needle and a cutting knife that cuts the lower end of the pile thread wound around the thread locking hook, A yarn carrier mechanism that feeds the pile yarn in a fixed amount in conjunction with the descending operation of the needle, and a yarn temporary locking mechanism that temporarily pushes the needle-side pile yarn wound around the looper to the side of the looper to temporarily lock the pile yarn. And forming the cut pile forming unit by combining the needle, the looper and the cutting knife, and arranging the cut pile forming units in series to form a cut pile forming unit to form the cut pile forming unit. The forming portion is relatively advanced in the series direction on the base cloth to selectively actuate the cut pile forming unit, and the streak cut pile is formed on the base cloth. Tafute Ing machine, characterized in structures forming Le. 2. A pile thread hole for loosely fitting a pile thread,
Also, a carrier plate having an operating mechanism that moves up and down a required stroke in conjunction with the needle, a top dead center operating cam provided on the frame side at the top dead center position of the carrier plate, and a bottom dead center position of the carrier plate. The cam has a bottom dead center operating cam provided on the frame side, and the cams are overlapped with each other by pivotally supporting a fulcrum on the carrier plate. A lock plate that holds the pile thread hole in the closed position or the open position by primary and secondary engagement is provided, and the lock plate is engaged with the top dead center actuating cam to assume the closed position and the bottom dead 2. A tufting machine according to claim 1, wherein the tufting machine is a thread carrier mechanism having a structure in which the point actuating cam is engaged to assume the open posture. 3. A presser spring for receiving a needle from the tip and sandwiching the needle is attached to a side surface of a thread locking hook of the looper, and the cut pile thread on the needle side is pressed and temporarily locked by the presser spring. 3. The tufting machine according to claim 1, wherein the temporary thread locking mechanism is characterized by a presser spring structure.