CH212178A - Loom without shuttle. - Google Patents

Description

Loom without shuttle. The present invention relates to a weaving loom without a shuttle, in which the laying of the yarn in the first pitch of the warp is carried out by means of a weft-laying member other than a shuttle, for the formation of work loops to be tied to the chain. This loom may, for example, be of the kind which is provided with a selvage device, for the manufacture of ribbons, strips, braids or other narrow selvedge webs.

In looms of this kind it has been proposed to lay the yarn back and forth across the pitch of the warp by means of a yarn insertion needle moved back and forth. or by means of a pivoted weft laying member, a reciprocating latch needle being provided to move in the direction of the warp and arranged to engage with the forged loops. The loom which is the subject of the invention is characterized by the fact that the weft-laying member is dead with a slide on a control member having a movement component transverse to the pitch of the chain, said control member being constrained to move in contact with a guide path, formed for example by a cam surface or a guide rail,. so that, in operation, the free end of the weft-carrying member is moved back and forth through the pitch of the warp in a predetermined curvilinear course to lay the weft in the pitch. chain.

If a selvedge is to be formed on the fabric being made, a form of execution should be adopted having a reciprocating enmeshing needle controlled to enmeshed the yarn loops as they are formed. are formed in the first step to form a selvage in the known way, but it is advisable to use in this case a fixed rod for guiding the traure, as the first year will see later.

The appended drawing shows, by way of example, one embodiment of the shuttleless loom which is the subject of the invention, only in its Parts which are of interest to the latter.

fig. 1 is a plan view of a loom unit for making a narrow selvage tape; fig. 2 is a side view of it in the direction of the arrow in FIG. 1; fig. 3 is a schematic plan of a Portion of fabric, showing the formation of the selvage.

For each ribbon unit of the loom, a weft laying member and cooperating knitting needle forming a cooperating unit with a chest block 1 arranged to be fixed by screws 3 to the frame 2 of the loom. The warp threads 4 are passed through harness blades combined with a suitable control to form the pitch, these parts not being shown, being of known usual construction. The weft 5 (fig. 3) is laid across the pitch by the weft laying member 6 having an eyelet 7 for the passage of the weft yarn. The fabric formed in the mov in warp and traure yarns passes under Plate 8 and between adjustable guides 8a mounted on Plate 8U, to the usual take-up roll (not shown).

To actuate the weft laying member 6, a bar 9 is slidably mounted in the frame of the loom and arranged to move back and forth therein by means of a control device. This bar carries a slide 11 fixed at an angle droh to 1a. bar 9. A Plate 12, having a curvilinear slot 13, is fixed to the frame 2 above said slide. A peg 14, carrying an arm 15 to which the frame laying member 6 is rigidly fixed, passes through the slot 13 and is secured to a slider 16 moving in the slide 11. In this way, when the bar 9 is brought to executing a back-and-forth movement, the ankle 14, while sliding, will be guided in a back-and-forth movement in the curvilinear slot weft 6, a movement having a transverse component to the pitch of the warp. The weft laying member 6 will reciprocate through the step in a curvilinear stroke 6a (Fig. 1). The angle of the slider 11 with respect to the bar 9 and the shape of the slot 13 can be varied as appropriate, provided that the eyelet 7 of the weft member 6 is moved back and forth. following a curvilinear path through the pass and passes beyond the field of the latter so as to be, in the extreme position of its active course, above the enameling needle of the selvedge to cooperate with eile.

To produce a knitted selvedge by interlocking the loops of work, a latch interlocking needle 17 is mounted in a holder 18 which is arranged to be reciprocated by means of a cam 19 actuated by a drive shaft 20 of the loom. A thread guide rod 21 is fixed in brackets 22 of the chest block 1 in a position parallel to the needle 17 and in a common horizontal plane with the latter, its free end being bent slightly upwards to rise at the above the needle latch 17 (fig. 2). Rod 21 is preferably made of spring steel.

To form the selvage, the needle 17 is moved forward as the weft loops are laid by the weft member 6 and the yarn guide rod 21 meets the weft yarn of each loop and makes so that it is introduced and guided into the first hook of the needle. When the weft member 6 leaves the step, the needle 17 moves back, carrying with it the loop of the oar last laid and pulls it through the loop formed by the last pair of sections of the previous weft laid during the last laying operation of the weft-laying member, as seen in fig. 3. In this way, a selvedge is obtained by marginally enclosing the consecutive loops of yarn. This method of forming a selvage by enamelling with traure is known and does not need to be described in greater detail. While the entangling needle employed is preferably of the latch type, a beard needle or other needle construction could also be employed. If desired, one could also remove wire guide bar 21 and replace the needle and bar with a guide member needle such as that described in Swiss Patent No. 212181.

On the other hand, a separate selvage yarn could be fed into the selvedge and tangled with the yarn loops, as is known.

A selvedge formation mechanism could also be provided on both sides of the warp sheet. In the latter case, an would employ two weft-laying members of the kind of weft-laying 6 described above, one on each side of the warp layer. A comb could be placed on the frame of the loom to help in the operation of bringing the dunes closer together. The curved path along which the framelaying member 6 moves, however, allows the line or line to be introduced contiguously into the step and may thus serve to bring the dune closer in a tight position, but a beater could also eire employed for this purpose.

Weft laying member 6 may be of any suitable shape desired and its operative length and angular position relative to arm 15 may be made adjustable by means of an adjustable slide device such as that indicated at 23 in FIG. . 1.

The peg 14 is shown moving through the curvilinear slot 13, but it is understood that instead of the slot one could also employ a cam of suitable configuration against which the peg 14 would be pressed by suitable means such as a spring for example.

It is also understood that the loom may be equipped with a row of warp plies with a corresponding series of weft-laying members, with or without selvage forming mechanisms, arranged to operate simultaneously on the different warp plies, to make a series of adjacent tissues.

In the embodiment shown, the weft-laying member and the organs associated with it form a complete unit that can be easily mounted on the loom.

Claims (5)

CLAIM Shuttle loom in which the laying of yarn in the warp pitch is effected by means of a weft laying member other than a shuttle, for the formation of yarn loops to be tied to the warp , characterized in that the weft laying member is slidably mounted on a control member having a movement component transverse to the pitch of the warp, said control member being forced to move in contact with a path guide so that in operation the free end of the weft laying member carrying the shear is moved back and forth through the pitch of the warp in a predetermined curvilinear course to lay the shear in the 1st step of the chain. SUB-CLAIMS 1 Shuttle weaving loom according to claim, with means for forming a selvage in the fabric, characterized in that it comprises a weaving needle arranged to move back and forth in the direction of the threads of the yarn. chain on the side of the selvage to be formed, to grip the loops of wool to be entangled, and a fixed guide rod for the wool which is parallel and adjacent to said needle and is intended to ensure the engagement of the loops of wool formed by the weft-laying member in the gripping part of the enameling needle. 2 Shuttle loom according to claim and sub-claim 1, characterized in that the guide rod is made of spring steel and is located in the same horizontal plane as the needle of the needle. - Mesh, its free end being bent upwards to rise above the gripping part of said needle. 3 Shuttle loom according to 1a. claim, characterized in that the control member of the laying-weft member is fixed to a pin secured to a movable slider in a slide, this pin engaging in a curvilinear slot of a fixed plate, the slide being fixed to a reciprocating bar transversely. the latter, the arrangement being such that when the bar moves back and forth the slider is caused to slide in the slider and the pin is constrained to move back and forth along of said slot, in order to cause the weft member to move back and forth through the pitch of the warp along a predetermined curvilinear path. Shuttle loom according to claim, characterized in that the weft laying member and the members associated therewith form a complete unit for easy assembly on the loom. 5 Shuttleless loom according to claim and subclaims 1 to 4, as shown in the accompanying drawing.