EP0552495B1 - Gripper loom with guiding means for guiding gripper strap - Google Patents

Description

The invention relates to a rapier weaving machine with guide means which are attached to a sley and can be inserted through a warp thread sheet into a shed for forming a guide for a rapier in the direction of the shed.

In the case of weaving machines in which the rapier belt is guided on the lower warp threads, guide means are provided which can cooperate with one or with both side surfaces and / or with the upper side of the rapier belt. A related example is described in US 4076053. In looms in which the rapier belt is not guided on the lower warp threads, guide means are provided which can work together with the underside, with one or both side surfaces and / or with the top side of the rapier belt. Examples in this regard are described in US 3299911 and in EP-A 406926.

The shape of these guide means is chosen so that on the one hand they ensure good guidance for the looper belt, but on the other hand give no cause for damage and / or breakage of the threads. Special forms of guide means are therefore required when weaving fabrics with specific weaves.

In order to ensure the best possible guidance of the rapier belt and to avoid damage and / or breakage of the threads, a suitable shape of the guide means can be selected for each type of fabric to be woven. The shape of the guide means can also be selected as a function of the point at which the gripper belt is to be guided in the shed. When changing the type of fabric to be woven on a weaving machine it is sometimes desirable to provide a guide with a different shape. In known weaving machines, this requires the replacement of the guide means. This is an expensive job. Often, the guide means and / or their fastenings are not easily accessible. Given the small dimensions of the guide means and the fact that they are completely removed, they can be easily lost.

The invention has for its object to simplify a change in the guide for the gripper belt.

This object is achieved in that the guide means are each equipped with at least two differently designed guide elements, and in that the individual guide elements can optionally be used to form a guide by changing the attachment position of the guide means on the sley.

The invention offers the advantage that individual guide elements can be selected in a simple manner from the existing guide elements, wherein different guides for the gripper belt can be created by optionally attaching the guide means to the sley, which guides are adapted to the type of fabric to be produced.

Fig. 1

zeigt einen Schnitt einer Weblade, an der erfindungsgemäße Führungsmittel befestigt sind,

Fig. 2

eine Ansicht in Richtung des Pfeiles F2 der Fig. 1,

Fig. 3

in größerem Maßstab einen Teilschnitt F3 entsprechend Fig. 1 durch den Bereich der Befestigung der Führungsmittel,

Fig. 4

eine Variante der Ausführungsform nach Fig. 1 bis 3,

Fig. 5

eine Seitenansicht der in Fig. 4 dargestellten Ausführungsform,

Fig. 6 und 7

die Ausführungsform gemäß Fig. 4 und 5 in einer anderen Position,

Fig. 8 und 9

verschiedene Positionen einer abgewandelten Ausführungsform,

Fig. 10 und 11

verschiedene Positionen einer weiteren Ausführungsform,

Fig. 12 und 13

eine weitere Ausführungsform in einer Ansicht und im Schnitt und

Fig. 14

eine variierte Ausführungsform ähnlich der in Fig. 2 dargestellten Ausführungsform.

Further features and advantages of the invention result from the following description of the exemplary embodiments shown in the drawings and the subclaims.

Fig. 1

shows a section of a sley to which guide means according to the invention are attached,

Fig. 2

2 shows a view in the direction of arrow F2 in FIG. 1,

Fig. 3

on a larger scale, a partial section F3 corresponding to FIG. 1 through the area of the fastening of the guide means,

Fig. 4

a variant of the embodiment of FIGS. 1 to 3,

Fig. 5

3 shows a side view of the embodiment shown in FIG. 4,

6 and 7

4 and 5 in a different position,

8 and 9

different positions of a modified embodiment,

10 and 11

different positions of a further embodiment,

12 and 13

a further embodiment in a view and in section and

Fig. 14

a varied embodiment similar to the embodiment shown in Fig. 2.

In Fig. 1 the sley (1) of a weaving machine is shown, which for example consists of a driven weaving axis (2), attached saddle legs (3) and an attached, corresponding to the width of the weaving machine (4) with a reed (5 ) and tensioning devices (6) for the reed (5) (or reed). Furthermore, a gripper belt (7) with a gripper (8) mounted thereon, the warp threads (9) and the fabric (10) are shown schematically.

The weaving machine has a guide (11) for the rapier belt (7), which is formed from guide means (18, 18 '), which have guide elements (12, 13, 14, 15) and on the sley profile (4) the sley are attached. For this purpose, a second profile (16), which corresponds to the width of the weaving machine, is fastened to the weaving profile (4) at a desired height, for example with screws (17). The guide means (18, 18 ') and the guide elements (12, 13 and 14, 15) are made in one piece and are each attached to the sley (1) in such a way that one of the guide elements (12 or 13 and 14 or 15 ) cooperates with the gripper belt (7).

As shown in FIGS. 1 to 3, the guide means (18, 18 ') are fastened to the second profile (16) with screw means (19). For this purpose, there is a bore in the guide means (18), which contains the guide elements (12 and 13), a bore or a slot in the second profile (16) into which the screw means (19) can be inserted, and in the guide means (18) , which contains the guide elements (14 and 15), a thread is provided which cooperates with the screw means (19) in order to thread the guide means (18) with the guide elements (12 and 13) and the guide means (18 ') with the guide elements (14 and 15) to be attached to the profile (16). The screw means (19) are arranged in such a way that they are easily accessible for loosening or tightening, without the need to remove the reed (5) and / or the profile (16). For this purpose, the screw heads are arranged on the side facing away from the reed (5). Lugs (20) are provided on the guide means (18, 18 '), which engage in a recess (21) in the second profile (16) running transversely to the weaving machine in order to enable their precise positioning.

The guide means (18, 18 ') are attached to the sley in such a way that either one of the guide elements (12 or 13 and 14 or 15) cooperates with the rapier belt (7). In the position shown in FIGS. 1 and 2, the guide elements (12 and 14) work together with the gripper belt (7), while the guide elements (13 and 15) are not used.

The guide elements (12 and 14), which cooperate with the rapier belt (7), move into and out of the shed, which is formed by the warp threads (9), during weaving. They guide the rapier belt (7) when they are in the shed.

If the guide means (18) with the guide elements (12 and 13) and the guide means (18 ') with the guide elements (14 and 15) are rotated through an angle of 180 ° (FIG. 3), then the guide elements (13 and 15) together with the gripper belt (7). It is clear that, depending on the position of the guide means (18, 18 '), the guide elements (12 and 15) or the guide elements (13 and 14) can work together with the gripper belt (7). In order to be able to turn the guide means (18) with the guide elements (12 and 13) or the guide means (18 ') with the guide elements (14 and 15) through an angle of 180 °, the screw means (19) do not have to be completely loosened, but can only be loosened in such a way that the lugs (20) of the guide means (18, 18 ') in question permit such a rotation. The screw means (19) can then be tightened again. This makes it possible to move the desired guide element (12 or 13) and / or (14 or 15) relatively quickly into a position in which it can work with the gripper belt (7).

4 and 5, an embodiment is shown in which four guide elements (22, 23, 24, 25) are provided on a guide means (18 ') which is attached to the sley. The lugs (20) of the guide means (18 ') work in the position shown with the outer sides (26) of the second profile (16). In this position, the guide element (22) works together with the gripper belt (7).

6 and 7 another position (rotated by 90 °) is shown, the guide element (23) with the gripper belt (7) works together. In this position, the lugs (20) engage in the recess (21) in a manner shown in FIG. 2. It is clear that in a different position of the guide means (18 ') one of the guide elements (24 or 25) can optionally also work together with the gripper belt (7). In order to cause one of the guide elements (22 to 25) to work optionally with the gripper belt (7), the guide means (18 ') with the guide elements (22 to 25) can be rotated through a desired angle after loosening the screw connection.

A further embodiment is shown in FIG. 8, wherein a plurality of guide elements (27, 28, 29, 30) are provided, which are made in one piece and are attached to the sley (1) as only one guide means (18). In the example shown, the two guide elements (27 and 28) of the only one guide means (18) work together with the gripper belt (7). If the guide means (18) is rotated through an angle of 180 ° (FIG. 9), the guide elements (29 and 30) are brought into such a position that they work together with the gripper belt (7) and thereby the gripper belt (7) Border on the side and guide on the top and bottom. In the example shown, the guide means (18), which contains the guide elements (27 to 30) and the lugs (20), is attached directly to the sley profile (4), the screw means (19) being easily accessible here, too, because the heads are arranged on the side facing away from the reed.

10 shows an embodiment with guide means (18, 18 ') arranged on both sides of the gripper belt (7), as in the embodiments according to FIGS. 1 to 7, wherein a guide means (18) with guide elements (31 and 32) and a Guide means (18 ') with guide elements (33 and 34) are provided. The guide elements (31 and 33) are designed in such a way that the looper belt (7) can be guided on the lower warp threads (9). Around the lower warp threads To be able to support (9), an elastic covering (35) is provided on the profile (16). In FIG. 11 the embodiment according to FIG. 10 is shown in a different position after the guide means (18) with the guide elements (31 and 32) and the guide means (18 ') with the guide elements (33 and 34) have been rotated through 180 ° were. In this position, the looper belt (7) is guided completely by the guide elements (32 and 34) and no longer on the lower warp threads (9). If the position of the gripper belt (7) is determined by your drive system, the height of the profile (16) must be changed for this position. This can be done by attaching the profile (16) to the sley profile (4) in a height-adjustable manner with screw means (17), as shown in FIG. 1.

12 and 13 a further embodiment is shown, wherein a plurality of guide elements (36, 37, 38, 39) are provided on a guide means (18 '), two guide elements (36, 37 and 38, 39) each in the running direction of the Gripper belt (7) are successively arranged at a distance. The guide means (18 ') can be fastened to the profile (16) with two screw means (19). In this case, the lugs (20) for positioning the guide means (18) are no longer required. In this exemplary embodiment shown, a known guide means is attached to the profile (16) with only one guide element (40) on the opposite side of the gripper belt (7).

FIG. 14 shows a varied embodiment of the embodiment shown in FIG. 2. The guide elements (12 and 14) of the guide means (18 '), which work together with the gripper belt (7), are located transversely to the running direction of the gripper belt - offset levels. The guide elements (13 and 15) are also in offset planes.

It is clear that the guide means (18, 18 ') with the guide elements (12, 13 and 14, 15 and 22 to 25 and 27 to 30 and 31, 32 and 33, 34 and 36 to 39) each have at least two guide elements , and that optionally at least one guide element can cooperate with the gripper belt (7), while at least one other guide element does not cooperate with the gripper belt (7). By selectively attaching the guide means (18, 18 ') with the guide elements to the sley (1) at a different angle, the selected guide elements can work together with the gripper belt (7).

In a modified embodiment, the guide means (18) has three guide elements, which are arranged in a star shape at an angle of 120 °, wherein one of these guide elements can cooperate with the gripper belt (7).

The device according to the invention for guiding a grip belt is of course not limited to the embodiments described as an example and shown in the figures and can be implemented in various other shapes and dimensions within the scope of the invention.

Claims (10)

1. Gripper loom having guiding means mounted on a batten and adapted for being passed through a group of warp threads and introduced into a shed, for forming a guide for a gripper strap, extending in the direction of the shed, w h e r e i n each of the guiding means (18, 18') comprises at least two differently configured guide elements (12,13; 14,15; 22,23,24,25; 27,28,29,30; 31,32,33,34; 36,37,38,39) and the individual guide elements can selectively be brought into an operative condition for forming a guide, by varying the mounting position of the guiding means on the batten (1).
2. Gripper loom according to claim 1, wherein each of the guiding means (18, 18') is rotatable about an axis that extends transversely to the batten (1), in order to bring the different guide elements into an operative condition.
3. Gripper loom according to claim 1 or 2, wherein the guiding means (18, 18') are arranged on both sides of a profile (16) extending in the direction of the batten (1) and the guide is formed in each case by the guide elements of two oppositely arranged guiding means.
4. Gripper loom according to claim 3, wherein the profile (16) is arranged on the batten (1) in a vertically adjustable way.
5. Gripper loom according to claim 1 or 2, wherein the guide is formed by a plurality of guiding means (18) each comprising two guide elements (27,28; 29,30) that can be simultaneously brought into an operative condition.
6. Gripper loom according to any of claims 1 to 5, wherein means (20, 21) are provided for securing the guide elements (18, 18') in their angular position.
7. Gripper loom according to claim 6, wherein the guiding means (18, 18') are provided with noses (20) to which recesses (21) are associated.
8. Gripper loom according to any of claims 1 to 7, wherein the guiding means (18, 18') are fastened by means of detachable screws (19).
9. Gripper loom according to claim 8, wherein common screws (19) are provided for retaining oppositely arranged guiding means (18, 18').
10. Gripper loom according to claim 8 or 9, wherein the driving flats of the screws (19) are arranged on the side facing away from a reed (5) of the batten (1).

Images