DE2154210A1 - Tufting machine - Google Patents

Description

Patent attorney

ßir-l.-lng. y-vjter Jackisdi 9 1 S A? 1 fl

7 Stiittaart N. Menzelstrasse 40 ^£ NH4IW

THE SINGEH COfIPAIiT - 29th OHt. 197!

30 Rockefeller Plaza

New York, N.X, 10020 A 32 553 - sk

Tufting machine

The invention relates to tufting machines, and more particularly a tufting machine for the optional production of loop carpets and the like with long loops and carpets with conventional loop height by adjusting the machine accordingly.

Tufting machines with a so-called loop guide device for the production of carpets and the like advises long loops are known in which the Madeline mechanism covers normal or conventional lifting paths and a first loop gripper grips a loop of thread from the needle and brings the loop to the desired length and a second loop gripper grips the loop vom.ersten loop gripper and holds it to secure its length and to cut the loop in the area of the ilever device. These sewing machines have the disadvantage that, although they produce carpets with long loops, the loop height cannot be changed because the loop gripper is essentially fixed in its working movements. As far as is known, these machines have. never found popular on the Harkt. It is also known.

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that Νορρ, βη or »loop fabric through the extension or increasing the needle stroke of the machine and produced by using relatively long needles can. Needles with a total length of approx. 17 to cm, which are inserted into the fabric up to the desired loop height penetrate, have already been used, but when using such needles the operating speed the machine can be reduced to about half of its normal speed. It also occurs when using Such needles place a greater load on the needles due to the sustained transverse pressure of the tissue, whereby the needles are bent sharply to the side and the hooks and needles wear out unnecessarily, and there is also the fact that Loops are noticeably lost during these operations will. As can be seen from the following description, the device according to the invention presents the disadvantages of the two machines described above and creates a machine for the production of loops of different Length at standard machine speed and without essentially changing the needle stroke.

According to the invention, a tufting machine is created which consists of a base plate or the like. Guide member for a base fabric, a device for moving a base fabric over this base plate and at least one needle for forming loops by threading the needle through this base fabric transversely and dii ¹ as a first reciprocating loop gripper and a device for adjusting the length of the reciprocating oscillation, this first loop gripper serving to grab a loop of the yarn from the needle and the To increase the length of the thread loop removed from this needle, and which further comprises a second loop gripper which is used to grip a thread loop from the OiTdten loop gripper during its downward movement, the second loop gripper being adjustable in its distance from the base plate in such a way that

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that it can be brought into a position suitable for cooperation with the first loop gripper, whereby the first and the second schiauf engages in education Loops of different lengths between the minimum length corresponding to the penetration depth of the needle in the base fabric and the maximum length corresponding to the maximum stroke of the reciprocating oscillation of the first loop gripper is adjustable are.

The device thus comprises a loop mechanism, the normal I-needle stroke of which is, for example, 6.35 cm, for the production of carpets with standard loop height is commonly used. The mechanism also includes one first, reciprocating screeching mechanism, the is arranged in such a way that it grips the loop of yarn passed through the base fabric by the needle and the loop can extend so far that its length corresponds approximately to the stroke length of the first loop gripper. A second loop gripper, which preferably performs a substantially linear reciprocating movement, is arranged so that it the Loop of yarn on the first loop gripper essentially at the lower end of the stroke and the loop during the Return of the first loop gripper in its preparation for the next needle stroke. To work with the second gripper, there is a lesser caanisinus to cut through The loops are provided when the loops are in motion during the movement of the fabric over the base of the tufting machine be moved on. The reciprocating stroke of the first loop gripper is adjustable, so that the length the. The loop detected by the needle can be changed and can advantageously even be set in such a way that the first gripper mechanism in the creation of the loops does not take effect. Also the second loop gripper and the Kesser are adjustable with respect to the base or the guide element for the base fabric, so that they are with the first gripper can work together if this one

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is set, and it is also useful to work together with the needle can when the first gripper is in its rest position, then the machine as a standard tufting machine or can be operated as a standard machine for cutting through the loops. With the machine according to the invention can have loop lengths of 1.7 to 12.7 cm and more Standard speeds for tufting machines from e.g. 500 to 600 stitches per minute can be produced.

Further features and advantages of the invention emerge from the description of an exemplary embodiment on the basis of FIG Drawing.

Fig. 1 shows a section through one end of a tufting machine according to the invention, parts of which are for illustration the individual parts of the invention are broken away; Fig. 2 shows a section along the section line 2-2 in Fig. 1;

Fig. 3 shows a section along the section line 3-3 in Fig. 1;

Figures A-7 are schematic representations of various Working stages of the mechanism according to the invention.

1 shows a tufting machine with a frame 10 shown in side view. Although the machine shown in the drawing has only one criticism, it understands it goes without saying that the principles described here are also applicable to multi-needle machines and that a single needle is shown for illustrative purposes only. There are machines with a needle up to Machines with a thousand needles are known, and this invention is applicable to all of these machines.

Furthermore, Fig. 1 shows a main drive shaft 12, which is mounted in a suitable manner in the machine frame 10 and through a motor, not shown, is driven in a known manner. One arranged eccentrically on the main shaft 12

209819/0749 _8AD original

Part 14- serves to convert the rotational movement of the Main drive shaft 12 in a reciprocating motion Connection rod 16. A push rod 18 mounted in the machine frame is used to bring about its reciprocating movement connected to the connecting rod 16; at its lower end, a needle bar 20 is provided on which one or several needles 22 are attached.

In the V / eise known in tufting production a base fabric passed over the supporting needle or base plate 24 of the tufting machine (see FIGS. 4-7) and the needle 22 leads the yarn X through the Grundgev.'ebe F, whereby a tufted fabric is produced. There are suitable devices, not shown, for guiding the tissue in a known manner Way provided over the needle plate 24 away. A loop gripper mechanism for holding those through the needles 22 yarn loops formed during the return of the needles 22 in the upper position is also provided. A cutting device can also be assigned to the Greiiex'inechanismus, to cut the loops with cut loops to produce a tufted fabric.

As already briefly described above, it is the task of 3 Invention of creating a machine with the tufted or nubbed fabric or long pile fabric of different sizes Loop lengths can be produced and which can also be used as a standard tufting machine. Usually are a machine for the production of studded or long-pile fabric and a machine for the production of carpets of so-called standard tufting fabric required. In addition, the machines currently available on the market for the production of looped meat only in a very limited way Make frames of different types and lengths of loops. The machine according to the invention can easily be used for production a large number of nap fabric types with relatively large loop lengths can be set and easily by a relatively simple adjustment device

+) and forms loops on the other side of the Grundgowebes I · ¹

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into a machine for the production of fabric with standard loop length being transformed. This is when the carpets are made no more than one machine is required to produce different types of fabric as described above.

According to the invention is an adjustable loop gripper mechanism provided that a first gripper device comprising a first gripper 25; this is on a Greiferbzw. Hook rod 28 attached, in turn on a attached to the rotatable bearing pin 32 mounted ring 30 is. To move the bearing pin 32 and the gripper 26 a while 34- by a suitable not shown Connection to the main shaft 12 driven, with an eccentric J6 is arranged on the shaft J4, which is connected to a Connecting rod 33 is connected. By rotating the Shaft 34- becomes a substantially reciprocating motion of the eccentric 36 exerted on the connecting rod 38. the the latter is connected to a connecting plate 40 through one of the Slot 42 in the connecting plate 40 double-gripping Screw 44 connected. From the drawing int it can be seen that the position of the connecting rod 38 according to. Loosen the screw 44 and changed by changing the position of the connecting rod in slot 42 with respect to the connecting plate 40 can be, whereby the stroke of the connecting plate 40 changes. The connecting piaute 40 is to perform a Oscillating movement on one side on a fixed one Bearing pin 46 is arranged and is rotatable at its other end with a curved connection plate 48 connected, the other end of which is in turn hinged to a further connecting plate 50. At the other end of the plate 50 is a clamping ring 52 arranged on the log bolt 32 T is seen on the bearing pin 32 by means of clamping jaws 54 is attached, which are tightened by a suitable screw 56 in a known manner. Vibrate when the machine is running the connecting plates 40, 48 and 50 by the movement the connecting rod J58, being the on Jen loop gripper

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26 the movement performed as the last part is a reciprocating movement is. As a result, the Schiaufgreifer 26 swings back and forth and reaches according to its arrangement The needle is essentially in its lower cubic area and grips the yarn Y which is guided by the needle through the basic structure.

By correct timing and setting of the gripper 26 when gripping ler held by the needle 22 loop, the loop is pulled down and brought to a length corresponding to the remaining stroke length of the gripper 26, the loop gripper 26 can be adjusted so that the length its oscillation path can be changed, as a result of which the loop lengths change; This adjustment is done simply by loosening the screw 44 - and by changing the position of the connecting rod 33 in the slot 42. Furthermore, the loop gripper 26 can be completely switched off and brought into a rest position by the screw 5'3 and the clamping jaws 5 ^ - & ^m clamping ring 52 can be released in such a way that the connecting plate 50 to the clamping ring 52 no longer drives the bearing pin 32 on which the gripper is arranged. The gripper 26 can then be turned by hand on or with dom iiagerbolzen 32 down so that it is completely removed from your working area of the tufting mechanism. It follows from the following that this feature is of considerable importance when converting the long pile machine into a standard tufting machine.

When using the loop gripper 26, the yarn loop Y is thereupon during its Scm ·. ¹ ingbewerung down by a second gripper device with a gripper 58 id essentially at the end of the movement of the gripper 2-3 down, where then the gripper 58 removes the loop from the gripper 26 and holds it during the return of the gripper 26 in its starting position .

The loop gripper 58 is attached to a gripper rod 60 by means of suitable means such as adjusting screws or the like.

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held. The rod 60 is attached to a swing arm 62 by means of screws 64 which are screwed into square nuts 66 which are located in recesses 68 in the rear of the swing arm 62 (see Fig. 2). As shown in Fig. 1, the swing arm 62 has a relatively long end face 70 against which the end face 72 of the gripper bar 60 rests. The distance between the gripper 58 and the base plate of the base fabric is adjustable and is smaller or larger, depending on how, after loosening the screw 64, the gripper bar 60 is moved up or down along the end face 70 of the rocker arm 62, the square nut 66 slides in the recess 68. Thus, the loop gripper 58 can be in a large number of different positions accordingly the positions of the loop gripper swinging back and forth 26 to form the desired loop height. When the first gripper 26 is switched off as described above is, the gripper 58 can be raised to a position in which it acts like a known conventional standard loop mechanism, the sole and only the loops formed by the reciprocating needle 22. From Fig. 4 it can be seen that the gripper 58 as in a plane parallel to the tangent T of the circular arc A, i.e. the arc described by the gripper 26 can be when the gripper 58, as shown, is at the end of its movement.

The gripper 58 is a substantially reciprocating or linear movement; issued by means of a not shown, the poor eccentric described above, which is used to swing the gripper shaft 74 back and forth in a known manner A ring 76 is arranged on the gripper shaft 74, which is held in a similar way to gripper 26 and consists of one Ring 76, 3-point 78 and a screw 80 or the like. Is. The ige of ring 76 on shaft 74 can be changed and it becomes apparent from the following that the gripper can also be moved towards and away from the needle position. A connecting cord 82 is at one end to the ring 76 and on

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the other end to a swing arm 62 rotatably connected. Therefore, when the shaft 74 is moved back and forth, the Gripper 58 also performs a reciprocating motion, a substantially linear motion. The path of the Gripper 58 slightly curved, but it is here in the description viewed as a rectilinear path or a rectilinear reciprocating motion. At its other end is that Swivel arm 62 rotatable about a bearing pin 8A-, as in FIG Fig. 1 shown, stored.

As has also already been described above, with the machine according to the invention, fabrics in long pile and Standard tufting design can be made with cut loops. Figures 1 and 3 show one through one Hesserbalter 88 held knife; the holder 88 is in turn mounted in a knife bar 90. The knife bar is held by a clip-like member 92, the one Screw penetrates and that in a recess 94 in the end face of a holding part 96 is located, which in turn is on Machine frame is screwed or fastened in a similar way. As can be seen from Fig. 1, hold the knife bar 90 and the holder 88 the knife in contact with the gripper 58 to cut the loops when they hit the the rear end of the gripper 58 while the tissue is in is known to be conducted much more often.

As can also be seen from FIG. 3, the holding part is provided at its rear end 96 with a groove or recess in which a rod 102 lies, in which a screw 104 is screwed in. As can be seen from Figure 1, the end face 106 of the recess 100 is relatively long; the rod 102 rests against it with its one surface. By loosening the screw 104 in the rod 102 can keep the entire block containing the knife mechanism in the same Manner as the grapple 58 is raised or lowered. Around

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to lift the gripper 58 and the knife 86 together or to lower so that they work in the desired infeise simple. Shims in the space between the gripper bar 60 and Kesserstangen 90 and clamped these two parts together so that they can be raised and lowered together and locked in position with them maintain their position to each other. The rod 102 is made sufficiently long that it easily abuts the end can be in order to effect a change in position of the gripper and the knife 86. Venn the 3ev / egungsbahn des first gripper 26 is set for the production of different loop heights, then the position of the kettle

W 86 and the gripper 58 can be easily and quickly changed accordingly, as a result of which the mechanism for producing the desired loop height is coordinated with one another again. The knife mechanism is of the so-called stationary type and does not reciprocate with respect to the gripper 58. As the tissue runs, the loops are cut, the loops being moved towards the rear end of the gripper 58 and, when the gripper executes its horizontal reciprocating movement, the loop located at the rearmost part of the gripper 58 is cut When the gripper passes the cutting edge of the knife, the loop on the loop gripper 53 is pulled over the cutting edge of the knife by the movement of the gripper 58.

The operation of the machine can best be seen in FIGS. In FIG. 4, the needle 22 is in its about lowest position shown. When the needle 22 with the yarn Y has reached this position, the looper 26 is in its position The gripping position is pivoted to the thread loop on the needle 22 and holds this loop in place. During the backward movement of the needle 22 upwards, the loop encoder 26 extends the Loop through its pivoting movement (counterclockwise,

2098Ί9 / 0749

as shown) according to its stroke graduation.

When the gripper 26 has reached its lowest position, is the gripper 58 in its to take over the loop provided position has been moved and holds this during the return movement of the gripper 26 (see Fig. 5) · Off 4- it can be seen that the gripper 58 on its return movement with the loop Y on the fixed kettle 86 passes, the yarn loop Y being cut through at the rearmost part of the looper 58.

Fig. 6 shows the operation of the mechanism in the production of relatively short loop lengths and the corresponding hook setting. The way of working corresponds otherwise the one described above.

7 shows the operation of the mechanism with the loop gripper 26 switched off, as described above, so that it does not participate in the work process. The looper 58 and the better 86 are in their operative position for removing the yarn loop Y from the needle 22 during its downward movement, so that the operation essentially corresponds to that of standing earth machines for making carpets and the like with cut loops. It may also turn out to be necessary for the loop gripper 58 and the associated mechanism to be pivoted or moved closer to the needle 22 in order to ensure that the gripper engages precisely in the loops. The distance between the gripper 58 and the needle 22 is reduced in that the screw 80 and thus the Hing 76 is loosened, which then moves clockwise around the shaft 7 ^; + can be boiled. It goes without saying that the machine can also have such mechanisms as an adjustable base plate or an adjustable needle lifting device for changing the loop height in order to produce the so-called conventional loop heights when the machine operates in the latter manner. Of course, the knife can also

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turned off and the gripper 58 in an inverted position so that the machine can then be used as a standard machine for the production of loop fabric or in combination with the gripper 26 is used to produce a long pile or knobbed fabric, the loops of which are not cut open will. In this procedure, the loops are grounded for manufacture of loop fabrics removed from the gripper 58 in a known manner when the fabric is guided forward.

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Claims (7)

- ₁₃ - 215A210 Claims rl. Tufting machine with a base plate or the like. Guide element for a base fabric, a device for moving a base fabric over the base plate and at least one needle for forming loops by threading the needle through it this base fabric passes through it, characterized by a first swinging loop gripper (26) and a device for adjusting the length of its back and forth oscillation existing arrangement, the first loop gripper (26) is used to hold a loop of the To grab the thread (X.) from the needle (22) and increase the length of the thread loop ai removed from the needle, and furthermore by a second loop gripper (58), which is used to pull a loop of yarn from the first loop gripper (26) during to grab its downward movement, and which is adjustable in its distance from the base plate so that it is in a position suitable for cooperation with the first loop gripper (26) can be brought, whereby the first (26) and the second loop gripper (58) for forming loops of different lengths between the depth of the Einöring The minimum length corresponding to the needle in the end tissue and the maximum stroke of the back and forth oscillation of the first loop gripper (26) corresponding maximum length are adjustable. 2. Tufting machine according to claim 1, characterized by one with the second loop gripper (53) cooperating Cutting device for cutting through the loops of twine held by the second loop gripper (Y). 3. Tufting machine according to claim 2, characterized in that the cutting device comprises a cutter (86) which to cut the loops while the second gripper (58) is fixedly arranged opposite the cutting edge of the knife (86). 2098 19/0749 4. Tufting machine according to one of the preceding claims, characterized in that the first loop gripper (26)
can be put out of operation, and the second loop gripper
(ß8) to take over the loop from the! rebuke (22) itself
is adjustable. 5. Tufting machine according to one of the preceding claims, characterized in that the second loop (53) is in an arc ( A)
parallel plane is adjustable. (Fig. 4). 6. Tufting machine according to one of the preceding claims, characterized in that the second loop gripper (58) performs a substantially rectilinear} reciprocating motion. 7. Tufting machine according to one of the preceding claims, characterized in that the second loop gripper (53) and the fixed bowl (86) can be adjusted independently of one another are. 2098 - 9/0749