Temple for weaving looms

Abstract

 A temple (10) for the loom of a textile machine includes a longitudinal pin (12), a plurality of support members (14) each having a hole (16) by means of which they are threaded in sequence onto the pin (12), and a plurality of rings (24) with respective central holes (26) for mounting each ring (24) for rotation on one of the support members (14). The angle formed by a line (18) parallel to the overall plane of the support members (14) and the normal (20) to the longitudinal axis (22) of the central hole (16) through each support member (14) is greater than 0°, so that the rings (24) are inclined obliquely with respect to the pin (12). In addition, each support member (14) is arranged entirely within the central hole (26) in its associated ring (24), in such a way that each ring (24) is positioned outwardly of its associated support member (14) with at least one base surface (32) substantially contiguous to the facing base surface (32) of an adjacent ring (24).

Description

[0001] The present invention relates to a temple for the loom of a textile machine. This mechanical member serves to stretch the cloth transversely by exerting tension in the direction of the weft, thereby preventing it shrinking as a result of the weft shortening as it becomes sinuous as it is woven though the warp.

[0002] In more detail, the temple comprises a longitudinal pin, a plurality of support members each with a respective hole by means of which they are threaded in succession onto the pin, and a plurality of rings, each having a central hole by which it is rotably mounted on a respective said support member, the angle formed between a straight line parallel to the overall plane of the said support members and the normal to the longitudinal axis of the hole through each member being greater than 0°, in such a way that the said rings are arranged obliquely with respect to the pin.

[0003] In the prior art, these support members include a first portion which acts as hub for the associated ring and a second portion, longer in the radial direction, the distal portion of which is flanking the ring. This means that the outer surface of the temple, intended in use to face an edge of the cloth, is constituted by an alternately arranged succession of rotatable rings and fixed distal portions of the support members. In particular, only the outer lateral surface of each ring, which typically has pointed protuberances or spikes, is actively involved in stretching the cloth, while the outer surface of the distal portions of the annular members does not actually interact with the cloth.

[0004] This difference means that the temple transmits uneven stress to the cloth which could compromise the quality of this latter.

[0005] In order to obviate this disadvantage, the subject of the present invention is a temple of the type described at the beginning of this description, characterised in that each annular member is disposed entirely within the central hole in its associated ring, such that each ring is arranged outwardly of its associated support member and has at least one base surface substantially contiguous to the facing base surface of an adjacent ring.

[0006] According to the invention, substantially the entire outer surface of the temple interacts with the edge of the cloth facing it, since it is constituted by the external lateral surface of the rotatable rings. This ensures that the temple transmits homogeneous stress to the cloth since no portions thereof face fixed components of the temple.

[0007] The temple of the invention also makes it possible to use very thin rings of a thickness (measured axially) of only 1mm, for example. Because the rings are so thin, even though they are positioned oblique to the axis of the pin, the various spikes projecting from any one pin remain substantially equidistant from the respective portions of cloth they face. Since the degree of stress that the spikes transmit to the cloth depends largely on the distance between it and the spikes, it is clear that the temple of the invention provides not only macro-homogeneity of stress along its entire length but also micro-homogeneity of stress with regard to each individual ring.

[0008] In addition, since there are no parts of support members interposed between adjacent rings, the temple of the invention is shorter longitudinally than temples of the prior art, despite having the same active surface of rings in contact with the cloth. This constitutes a significant advantage since the portion of the edge of the cloth which is in contact with the temple, and can thus be damaged and need to be discarded, is significantly reduced.

[0009] Further advantages and characteristics of the present invention will become apparent from the following detailed description, provided by way of non-limitative example, with reference to the appended drawings, in which:

Figure 1 is a longitudinally sectioned view of a part of a temple of the invention;

Figure 2 is a side view of a few support members of the temple of Figure 1;

Figure 3 is a side view of a few rings of the temple of Figure 1,

Figure 4 is a cross section taken on the line IV-IV of Figure 1, and

Figure 5 is a side view of an alternative embodiment of the rings of a temple of the invention.

[0010] A temple 10 for the loom of a textile machine includes (Figures 1-4) a longitudinal pin 12 with a succession of support members 14 threaded thereon by means of a respective through-hole 16. The members 14 are in the shape of flat rings, with the angle α (see Figure 2) formed between a line 18 parallel to the general plane thereof and the normal 20 of the longitudinal axis 22 of the holes 16 (which coincides with that of the pin 12) being greater than 0° and, preferably, less than 30°. According to a technique which is known per se and not shown in the drawings, once the support members 14 are threaded onto the pin 12 and each associated with a respective ring 24, which will be described in greater detail later, they are packed tight together so as to be secured to the pin 12, arranged inclined to the axis 22.

[0011] As stated earlier, a ring 24 with a central through-hole 26 is mounted for rotation on each support member 14. Each ring 24 is constituted by an inner hub 28 made of a material with a low coefficient of friction and by an annular portion 30 fixed onto the hub 28 through which the central hole 26 is formed. Each ring 24 is flat, with parallel base surfaces 32 connected by a lateral surface 34 having a plurality of spikes 36 protruding therefrom and arranged in a plurality of circumferential lines. Figures 1 and 3 show two lines of spikes 36, but this number can vary in dependence on the requirements of each application, varying between 1 and 10, for example.

[0012] Because of the inclination of the support members 14, the rings 24 are inclined obliquely with respect to the pin 12. In addition, each support member 14 is arranged entirely within the central hole 26 of its associated ring 24, in such a way that this latter is disposed outside a respective support member 14 with its base surfaces 32 substantially contiguous to the bases 32 of the adjacent rings 24. The two end rings 24, that is the first ring and the last, will obviously only have one base surface 32 contiguous to that of the only ring 24 which is adjacent to them.

[0013] Preferably, the outer diameter of the rings 24 will vary from 18 to 35mm, that of the pin 12 from 6 to 15mm and the number of spikes 36 per ring 24 will vary from 10 to 360.

[0014] In operation, the temple 10 is positioned with the axis 22 parallel to an edge of the cloth 38. Substantially the entire outer surface of the temple 10 facing the cloth 38 interacts with this latter to prevent it shrinking in the sense of the weft, since this surface is constituted by the outer lateral surfaces of the rotatable rings 24. This ensures that the stress that the temple 10 transmits to the cloth 38 is homogeneous, since no portion of the latter faces fixed components of the temple 10.

[0015] Figure 5 shows a manufacturing variant of the rings 24 of a temple of the invention. In this case, a circular crown 40 of a material with a low coefficient of friction extends radially outwards from one end of the hub 28, thereby reducing wear and the stress caused by the contact of each ring 24 not only with a respective support member 14 but also with its adjacent rings 24.

[0016] In a further manufacturing variant of the rings, which is not shown in the drawings, a circular crown of a material with a low coefficient of friction extends radially outwards from each end of the hub, thereby reducing wear and stress on the rings even further.

[0017] Naturally, the principles of the invention remaining unchanged, manufacturing details and embodiments may vary widely from those described purely by way of non-limitative example, without departing thereby from the scope of the invention.

Claims

1. A temple (10) for the loom of a textile machine which includes a longitudinal pin (12), a plurality of support members (14), each with a hole (16) by means of which they can be threaded in sequence onto the pin (12), and a plurality of rings (24) with a respective central hole (26), whereby each ring (24) can be mounted for rotation on one of the said support members (14), the angle formed by a line (18) parallel to the overall plane of the said support members (14) and the normal (20) to the longitudinal axis (22) of the hole (16) through each support member (14) being greater than 0°, so that the said rings (24) are disposed inclined to the pin (12),
the said temple being characterised in that each support member (14) is arranged entirely within the central hole (26) of its associated ring (24), in such a way that each ring (24) is positioned outwardly of the associated support member (14) with at least one base surface (32) substantially contiguous to the facing base surface (32) of an adjacent ring (24).

2. A temple (10) according to Claim 1, characterised in that each of the said rings (24) is formed by an inner hub (28) of a material with a low friction coefficient and by an annular element (30) fixed to the outside of the hub (28) through which the said central hole (26) is formed.

3. A temple (10) according to Claim 2, characterised in that a circular crown (40) of a material with a low coefficient of friction extends radially outwardly of at least one end of the said hub (28).

4. A temple (10) according to Claim 3, characterised in that a respective circular crown (40) of a material with a low coefficient of friction extends from each end of the said hub (28).

5. A temple (10) according to any preceding Claim, characterised in that each of the said rings (24) has a plurality of spikes (26) which protrude from the lateral surface (34) between its two base surfaces (32).

6. A temple (10) according to any preceding Claim, characterised in that each of the said support members (14) is in the shape of a flat ring and in that the angle (α) formed by a line (18) parallel to the overall plane of the said support members (14) and the normal (20) to the longitudinal axis (22) of the hole (16) through each support member (14) is less than 30°.

Drawing