DE2048543A1 - loom - Google Patents

Description

DIPL.-ING. H. FINK PATENTANWALT · 7300 ESSLINGEN (NECKAR) · HINDENBURGSTRASSE

• Palentonwolt FINK · D 7300 Enlingm (Nedcor), Hindenburfl »tro6e 44

September 30, 197O Li P 5853

Hugh Jonathan Tovey, 20 Mead Walk, Stanton, Burton-on-Trent, Staffordshire, UK

"Loom"

Claimed priority of UK patent application 49095/69 dated October 7, 1969

The invention relates to a loom in which the weft thread is inserted with the aid of a beater or a thread insert The needle is inserted from one side and through the warp shed and the opposite edge of the weave through a knotting process is secured by the weft thread is knotted even in a chain stitch along the edge of the weave.

In this type of loom, it is common for the thread-inserting needle, when it is fully passed through the warp shed, to place a weft thread loop near the open hook of a latch needle and for the latch needle to be moved up and back relative to the loom frame to pick up the weft thread in the hook, then move it further to complete the knotting process and create a chain stitch. A usual _ ₂ -

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ORIGINAL INSPECTED

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September 30, 1970 Li P 5853

The method of creating the upward movement is to mount the latch needle on articulated links that are arranged so that the front articulation link is shorter than the rear, which means that for a given forward and backward swinging motion, the different lengths of the articulation links are different Position the latch needle and thereby raise and lower the hook of the latch needle. The way that the latch needle on its Vorwärtssbzw. Backward movement is identical and almost circular and this path does not lead the latch needle to a very satisfactory hooking process, since the lifting part of the path is traversed relatively slowly compared to the entire path of the latch needle. Furthermore, the axis of the latch needle does not always pass through the seam point during the movement sequence. As a result, the previously knotted loop, which is still on the shaft of the latch needle, is stretched or, in an extreme case, it breaks, whereby an unsatisfactory weave edge comes about. Likewise, because of the multiplicity of articulated links and joints included in the conventional articulated chain, the latch needle is prone to undesirable movements as a result of play and wear in the joints and the consequent possibility of interference.

The object of the present invention is to create a needle loom in which the needle for knotting the weave edge is held extremely firmly and in which the disadvantages set out above do not occur or are at least substantially alleviated.

According to the present invention, a loom of the aforementioned type is characterized by a knotting needle device with a four-bar chain for controlling the movement of the knotting

10981ü / 1B7

ORiGWAt INSPECTED

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September 30, 1970 Li P 5853

needle in such a way that its hook moves on a path in the manner of the profile of a teardrop shape, and in operation the needle shaft safe during the entire movement of the needle hook essentially in the plane of the seam point of the fabric remains.

Is' ■ According to a further feature of the present invention

a loom characterized in that the weft thread from one side of the warp shed and through it; is inserted with the help of a beater or a needle, ■ and the opposite edge is secured by a knotting process, the weft thread itself into a warp; is engraving attached along the Webrandes that a four-bar chain for Knüpfnadel with this arm carrying \ as a coupling, a crank, with a rocker arm and a fourth link is provided that a carrier for the Knüpfnadel where the Knüpfnadel supporting arm is fixed that a device is provided for attaching the knotting needle to the carrier of the knotting needle and that the link chain is designed for such a movement that during a work cycle of the loom the hook moves on a path in the manner of the profile of a teardrop shape, and that at the same time the The axis of their shaft is always essentially above the seam point of the fabric.

The invention is further described using an example with reference to the accompanying drawing. In this demonstrate

Figure 1. A schematic side view of the invention having loom;

FIG. 2 is a schematic plan view of the loom according to FIG. 1;

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ORIGINAL INSPECTED

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September 30, 1970 P 5853

Li

Figure 3 is a side view of a latch needle, a support arm and an associated link chain according to the invention in a rearward direction with respect to the reed of the loom inclined position;

Figure ¹ I a view similar to figure 3> However, in a forwardly inclined position of the latch needle and its associated parts in relation to the reed;

Figure 5 is a view of a clamping device for the latch needle and the support arm.

According to the drawing, an arm 1 carrying a latch needle is mounted in an eccentric bearing 2 which is mounted on a main shaft 3 of the loom. A relative to the eccentric bearings 2 rearwardly extending end portion 2a of the latch needle supporting arm 1 is rotatably connected at ¹ J with a support lever 5 which is hinged to a part of the loom frame 7 in turn at. 6 The arrangement described above forms a four-bar chain in which the arm 1 carrying the latch needle is a "coupling", the eccentric bearing 2 is a "crank", the support lever 5 is a "rocker" and the loom frame 7 is the fourth chain link. A latch needle 9 is held by a clamping plate 10 on a carrier 8 which is attached to the cranked vertical extension of the support arm 1. A rotation of the loom main shaft 3 causes a rotation of the eccentric bearing 2 during operation and thus a movement of the support arm which guides the hook of the latch needle 9 along a path 11 or a "coupling point curve" in the manner of the profile of a teardrop shape, as in FIG and H is shown, whereby an initial lifting movement of the hook of the latch needle 9 occurs before a substantial backward movement of the latch needle. The initial stroke movement

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ORIGINAL INSPECTED

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September 30, 1970 Li P 5853

the hook is used to pick up the weft thread better than was previously possible. The shaft of the latch needle 9 is attached and inclined with respect to the vertical plane that it always passes through the point 12 on the seam of the fabric during a movement sequence, so that the previously knotted loop that lies around the shaft is not widened. The point 12, levels 13 and I ¹ J of warp leaves and a reed 15 are shown in dashed lines in FIGS. 3 and k. The initially vertical movement of the hook of the latch needle 9 takes place when the latch needle is in a forwardly inclined position (FIG. 4) with respect to the loom frame 16 (FIG. 1), only two of which are shown.

Since the support arm 1 is mounted directly on the loom main shaft / directly without any interconnection other than the eccentric 2 is, play or wear in the pivot points of the connection has essentially no effect.

The accompanying drawing shows the invention in connection with a loom for a tight weave. The invention can can of course not only be used for this type of loom, but also for a loom for wide fabrics with which a knotted weave is to be produced. Although not related to the use of a closing thread has been taken, it can also be attached if desired.

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ORIGINAL INSPECTED

Claims (1)

September 30, 1970 Li P 5853 Claims Loom, characterized by a tying needle device with a four-link chain (1,2,5,7) for controlling the movement of the knotting needle (9) in such a way that sich.deren hooks on a path according to the type of profile a teardrop shape and moved in the operation of the needle shaft during the entire movement of the needle hook in remains essentially in the plane of the seam point of the fabric. 2. Loom according to claim 1, characterized in that that the weft thread from one side of the warp shed and through this with the help of a mallet or a needle is inserted and the opposite woven edge is secured by a knotting process, wherein the weft thread itself is knotted into a chain stitch along the edge of the weave so that a four-link chain (1,2,5 * 7) for the knotting needle with an arm (1) carrying it as Coupling, with a crank (2), with a rocker (5) and a fourth chain link (7) is provided that a Carrier (8) for the tying needle on which the tying needle supporting arm (1) is attached that means (8 to 10) for attaching the knotting needle to the carrier the knotting needle is provided and that the link chain is designed for such a movement that during of a working cycle of the loom, the hook moves along a teardrop-shaped profile type path and that at the same time the axis of its shaft is always essentially above the seam point of the fabric. 1 O 9 8 1 6/1 b 7 7 ORIGINAL INSPECTED _ ₇ _ Sept. 30, 197O Li P 5853 3. Loom according to claim 2, characterized in that that the arm (1) carrying the knotting needle on the crank (2) is attached, showing the, shape of an eccentric Has bearing and is mounted on the loom main shaft (3). k. Loom according to claim 2 or 3j, characterized in that the arm (1) carrying the knotting needle has an end piece (2a) facing away from the crank (2) and that a support lever (5) in the form of a rocker with the end piece and with a fourth chain link (7) is articulated. 5. Loom according to claim 2 or 4, characterized in that g e k e η η, that a fixed part of the loom frame (7) is the fourth chain link. 6. Loom according to one of the preceding claims, characterized in that the knotting needle with the help a support (8) attached to the support arm (1) and a clamping plate (10) attached to the support is attached to the support arm, wherein the carrier plate and the clamping plate have a corresponding groove for receiving the shank of the tying needle. 7. Loom according to claim 6, characterized in that that the knotting needle is a latch needle. 10 9 8 16/1577 ORIGINAL INSPECTED S. L e r s e ι t e COPY