EP0576854B1 - Gripper loom - Google Patents

Description

The invention relates to a rapier weaving machine with at least a gripper, which is arranged on a gripper belt, the can be inserted into a shed and pulled out of the shed is and that within the shed by means of movable guide means is led in and out of the shed the shed can be moved out, in the area of the rapier a guide part is provided which at least the gripper belt widened on one side.

In known weaving machines of the type mentioned at the beginning (BE 900 044 A, US 5 183 084 A) grasp the movable guide means the edge facing away from a weaving comb with hook-like elements of the gripper belt, while additionally the underside of the Gripper belt is supported. There is a risk that Gripper tape with the gripper itself while entering one Weft thread rotates about its longitudinal axis so that the gripper and the gripper belt leave the guide means. This then leads usually to an incorrectly entered weft. According to US 5 183 084 A, Figs. 6 and 7, at the end of the Gripper belt in the area of the gripper on the underside Guide part attached. Another holding and guiding part is attached to the top of the gripper belt, the one forms the comprehensive leadership. The leadership tools have separate guides for the gripper belt and the Guide parts.

It is also known (EP 0 275 479 Al), a gripper belt with to provide a U-shaped or double-T-shaped cross section, that can be moved into the shed within the shed Leadership is guided. These leadership tools are designed with the cross-section of the gripper belt Provide recesses that cross the gripper belt and lead vertically to its level. The gripper is at this Design attached to the side of the gripper belt.

A weaving machine is also known (FR 2 552 455 A1), at which, by means of specialist training facilities, two superimposed Weaving fans are formed. Each of these weaving compartments is assigned a gripper driven by a gripper belt. On the opposite side of the gripper A plastic guide part is arranged, that protrudes on both sides over the gripper belt. The guide part forms a sliding surface with which it is on the weaving comb is led. In addition, on the opposite side of the weaving comb Side guide means arranged with the sley be moved and who are accordingly in the Move weaving fans in and out of them. This Guide means are each provided with a nose, the a longitudinal groove of the guide part is assigned. Two each Guide means are with their noses at the same time as the guide part engaged.

The invention has for its object a rapier weaving machine of the type mentioned in such a way that the Gripper belt and the gripper are not due to twisting can move out of the leadership means.

This object is achieved in that the gripper belt and guide means having guides associated with the guide part are arranged in a row one behind the other and each have at least two guides, one of which Guiding the top of the gripper belt and guiding the Underside of the gripper belt are assigned that at least one of these guides both the gripper belt and the Guide part is assigned, and that the guide part to each other has opposite guide surfaces with guides the guide means a side guide for the guide part form.

Because of this training, the combination of gripper belt and guided part so that the possibility of Gripper band is restricted to move upwards and twist. Since in the area of the guide part Lateral guidance is formed, the accuracy of the guidance largely only from the guide part and those assigned to it Guide means determined. Still, it is more advantageous Possible way, the gripper largely centered on a flat side to arrange the gripper belt.

In an embodiment of the invention it is provided that the mutual Distance of the movable guide means in the longitudinal direction of the gripper belt in this way to the length of the guide part it is agreed that in each case at least two guide means are simultaneously engaged with the guide member. This makes the guide part particularly safe to guide ensures that it is not between the management means can twist or move upwards.

In a particularly advantageous embodiment of the invention provided that the stationary guide means the gripper belt lead across and perpendicular to its flat sides and recesses have a distance from the guide surfaces of the guide part. This ensures that the stationary guide means the gripper belt across and perpendicular align to its flat sides while those in the shed Movable guide means assigned to the guide part are. This eliminates the risk of wear on the gripper belt reduce significantly because of possible misalignments the movable guide means in relation to the stationary ones Guide means not to wear the gripper belt to lead.

In a further embodiment of the invention it is provided that the stationary guide means and the movable guide means are provided with guides, each on different Place the gripper belt guide surfaces assigned.

Fig. 1

zeigt eine erfindungsgemäße Greiferwebmaschine in schematischer Darstellung,

Fig. 2

einen Schnitt entlang der Linie II-II der Fig. 1 in größerem Maßstab,

Fig. 3

einen Schnitt entlang der Linie III-III der Fig. 1 in größerem Maßstab,

Fig. 4

einen nochmals vergrößerten Ausschnitt F4 der Fig. 3 im Bereich der stationären Führungsmittel,

Fig. 5

einen ebenfalls nochmals vergrößerten Ausschnitt F5 der Fig. 2 im Bereich der bewegbaren Führungsmittel,

Fig. 6

eine Ansicht in Richtung des Pfeiles F6 der Fig. 3 auf die stationären und die bewegbaren Führungsmittel,

Fig. 7

einen Schnitt entlang der Linie VII-VII der Fig. 6 im Bereich der bewegbaren Führungsmittel,

Fig. 8

einen Schnitt ähnlich Fig. 7 im Bereich der stationären Führungsmittel,

Fig. 9

eine abgewandelte Ausführungsform als Schnitt ähnlich Fig. 8,

Fig. 10

einen Schnitt einer abgewandelten Ausführungsform ähnlich Fig. 7,

Fig. 11

einen Teilschnitt im Bereich von bewegbaren Führungsmitteln mit einem zur Führung eines Greiferbandes und eines Führungsteils dienenden Webladenprofil,

Fig. 12

eine Draufsicht auf die Ausführungsform nach Fig. 11,

Fig. 13 und 14

Teilschnitte ähnlich Fig. 11 durch weitere Ausführungsbeispiele und

Fig. 15 und 16

Teilschnitte durch weitere Ausführungsformen von in ein Webfach hineinbewegbaren Führungsmitteln.

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

Fig. 1

shows a rapier weaving machine according to the invention in a schematic representation,

Fig. 2

2 shows a section along the line II-II of FIG. 1 on a larger scale,

Fig. 3

2 shows a section along the line III-III of FIG. 1 on a larger scale,

Fig. 4

3 shows a further enlarged section F4 of FIG. 3 in the area of the stationary guide means,

Fig. 5

FIG. 2 shows a further enlarged section F5 of FIG. 2 in the area of the movable guide means,

Fig. 6

3 shows a view in the direction of arrow F6 in FIG. 3 of the stationary and the movable guide means,

Fig. 7

6 shows a section along the line VII-VII of FIG. 6 in the region of the movable guide means,

Fig. 8

7 shows a section similar to FIG. 7 in the area of the stationary guide means,

Fig. 9

a modified embodiment as a section similar to FIG. 8,

Fig. 10

7 shows a section of a modified embodiment similar to FIG. 7,

Fig. 11

1 shows a partial section in the area of movable guide means with a weaving profile serving to guide a gripper belt and a guide part,

Fig. 12

11 shows a plan view of the embodiment according to FIG. 11,

13 and 14

11 through further exemplary embodiments and

15 and 16

Partial sections through further embodiments of guide means that can be moved into a shed.

The rapier weaving machine shown in FIGS. 1 to 3 contains two gripper belts (1) for a transfer gripper (2) and one Takeover gripper (3). The one driven by a drive device (4) Gripper belt (1) moves the transfer gripper (2) with it the weft to be inserted up to the area of the middle of the Rapier weaving machine, where the takeover rapier (3), its rapier belt (1) also driven by drive means (4) is, takes the weft and to the opposite side transported. The drive means (4) in the area of side frames (5) are arranged, for example via a gear driven drive wheel (6) for the two Gripper belts (1). The gripper belts (1) are made using guide blocks (7) in contact with the respective drive wheel (6) held.

The rapier weaving machine is also provided with a sley (8), which is stored in the side frames (5) and which means drive means synchronized with the drive means (4) (10) is driven.

The rapier weaving machine is also equipped with a device Shed formation, the warp threads (19, 20) each weave forms, in which the weft threads are entered. The The sley (8) has a sley axis (15) with a sley profile (16) is provided on which a weaving comb (9) by means of Fastening means (17) is attached. After inserting the These are weft threads on the cloth (22) by a corresponding Swivel of the sley (8) struck. On the web store profile (16) is the weaving comb (9) by means of clamping devices attached. Furthermore, the web shop profile (16) has an intermediate profile (18) guide means (12) attached, in particular 2 can be seen. This guide means (12), the attached to the intermediate profile (18) by means of screws (21) are pivoted with the sley (8) so that they move into the respective shed (14) that is formed and then be moved out again.

Outside the area of the shed (14) are stationary guide means (11) in the area of the side frames (5) for the Gripper belts (1) are provided. If the movable guide means (12) aligned with the stationary guide means (11), the gripper belts (1) according to the direction of the arrow (A) introduced into the weaving compartments and brought back again. The drawer (8) is in its most swung back Position, i.e. the rear position. If afterwards the sley (8) pivots the weaving comb (9) to the edge of the fabric, move in a row one after the other Guide elements accordingly, as dashed in Fig. 2 is indicated.

As will be explained in more detail below, the stationary guide means (11) guide the gripper belts (1) parallel and perpendicular to their flat sides. Are there Guides of the guide means (11) directly guide surfaces assigned to the gripper belts (1). In the area of the shed (14) on the other hand, the leadership, especially the lateral guidance, in the essentially determined by a guide part (13), each in the area of the two grippers (2 and 3) on the associated one Gripper belt and / or on the gripper (2, 3) is attached. This Guide part determined in connection with the guide means (12) essentially the lateral position in the area of the Gripper. However, the guide means (12) guide the gripper belts (1) on the upper and lower flat side additionally. There the stationary guide means (11) and the movable guide means (12) assigned to different guide surfaces are and in particular also different components with regard to the lateral guidance, namely the gripper belts (1) on the one hand and the guide parts (13) on the other hand, is the danger wear of the gripper belts is significantly reduced. In addition, a disruptive influence is a little inaccurate Assembly of the movable guide means (12) in relation to the stationary guide means (11) less disturbing. Especially but the advantage is also obtained that the gripper belts (1) do not twist about their longitudinal axis with the grippers (2, 3) can, since both the guide parts (13) and the gripper belts (1) of the movable guide means on their tops and subpages. In the area of the guide parts (13), in which the gripper belts (1) around the guide parts (13) are widened, this unit is approximately over approximately half of their total width between an upper and guided bottom guide so that it is practically excluded is that the gripper belts (1) with the grippers (2, 3) around turn its longitudinal axis and leave the guide means (12) could.

As shown in FIGS. 4 and 5, the gripper belts have (1) in the area of the two end faces and in the edge area the upper and lower flat sides of guide surfaces (23, 24, 25, 26) with guides (27, 28, 29, 30) of the stationary Guide means (11) work together, but not with the movable ones Guide means (12).

The stationary guide means (11) have a recess, which in the area of one edge of the gripper belts (1) Guides (27, 28, 29) assigned to the edge region each form Connect at right angles. On a guide (30) is provided on the opposite side, that of the end face of the gripper belt serving as the guide surface (26) (1) is assigned to a substantially rectangular Has cross section. In the other areas, the Recess of the stationary guide means (11) compared to the Gripper belt (1) reset in such a way that the gripper belt (1) is not touched in these areas.

The guide part (13) has a strip-shaped body that the gripper belt protrudes laterally and downwards. The recess the stationary guide means (11) is designed in such a way that they have this strip-shaped body of the guide part (13) surrounded by distance, i.e. do not touch and also no leadership function for this guide part (13). The strip-shaped Body of the guide part (13) is then on the end face (26) of the gripper belt (1) with a recess provided, in which a the guide (30) forming approach of the stationary Guide means (11) protrudes only as the guide surface (26) serves the front side of the gripper belt, but maintains a distance from the guide part (13). The Gripper belts (11) are thus stationary Guide means perpendicular to its flat side (arrow direction B) and parallel to their flat sides (arrow direction C) by means of stationary guide means (11) performed.

The guide means (12) movable with the sley (8), the Aligned in a row on the intermediate profile (18) are, have a recess that the strip-shaped body the guide part (13) is adapted and each in the right Angle adjacent guides (31, 32, 33, 34) for correspondingly arranged guide surfaces of the guide part (13) form. The upper web of the guide means (12) is close to the gripper (2 or 3) extended so that it is hook-shaped overlaps the upper flat side of the gripper belt (1). In this Area forms the upper flat side of the gripper belt Guide surface (35) for guiding (37) the guide means (12). The lower web of the guide means (12) extends to beyond the middle of the gripper belts (1) and forms one Guide (38) for an area of the lower flat side of the gripper belt (36), which serves here as a guide surface (36).

Since the guide surfaces (23, 24, 25, 26) of the gripper belts (1) not in contact with guides of the movable guide means (12) come, these movable guide means (12) also no influence on wear of these guide surfaces. In order to relatively little wear is obtained, so that the Gripper belts (1) constantly in a clear position the stationary guide means (11) are held. Since the gripper belts (1) are parallel to the flat sides (Arrow direction B) and parallel to the flat sides (arrow direction C) are guided by the stationary guide means (11), there is the advantage that abrupt movements of the gripper belts (1) or vibrations in the gripper belts avoided if the gripper belts (1) and / or the guide part (13) leave or enter the stationary guide means (11) be introduced. Wear on the movable guide means (12) associated guide surfaces (35 and 36) of the Gripper belts (1) have no influence on the guidance of the gripper belts (1) in the stationary guide means (11). As well wear at these points has no influence on the Guide the guide part (13) in the movable guide means (12). A reduction in vibrations also leads to that Advantage that the guide surfaces (35 and 36) are less Are subject to wear.

The attachment of the guide part (13) is shown in FIGS. 6 to 8. This is in the area of the end of the gripping bandage (1) a recess into which the guide part is incorporated an approach is used that is essentially flush with the lower flat side of the gripper belt (1) runs. The recess does not extend into the area of the guide surface (25) of the guide part (13) opposite edge of the Gripper belt (1), so that an uninterrupted transition between this guide surface (25) and as a further guide surface (24) serving end face of the gripper belt (1) is given. This avoids that between the gripper belt (1) and the guide part (13) can hook warp threads, whereby Warp thread breaks could arise. This is important if wrong separate warp threads, especially for warp threads that are underneath of the gripper belt while they are normally should be at the top warp threads (19). Since the Guide surfaces (24 and 25) that can touch the warp threads, these guide surfaces remain subject to only slight wear (24, 25) intact, so that no warp threads through them to be damaged. The guide part (13) extends not even in the area of the leadership (29). The approach of Guide part (13) together with the grippers (2 and 3) Screws (65) and nuts (66) in this way on the gripper belt (1) attached that this gripper belt (1) between the gripper (2, 3) and the guide part (13) is clamped.

As can also be seen from Fig. 6, the distance is in a series of guide means arranged in relation to the length the guide part (13) chosen so that at least two and if possible three guide means (12) in engagement with the guide part (13). From Fig. 6 it can also be seen that the gripper belts are provided with cutouts (39) which a toothing of the drive wheel (6) of the drive device assigned.

As shown in Fig. 9, in the area of the guide surfaces (35, 36) of the gripper belts (1), which per se with the Guides (37, 38) of the movable guide means (12) work together, further guides (40, 41) in the stationary guide means (11) can be provided. If the guide surfaces (35, 36) wear on the movable guide means (12), this is not too harmful since the gripper belts (1) still parallel and perpendicular to the flat sides on the Guide surfaces (23, 24, 25, 26) are guided.

In the embodiment of Figure 10 it is provided that the strip-like body of the guide part (13) with a longitudinal groove (42) is provided, in which a rib-like guide (43) movable guide means (12) enters. Under certain circumstances the risk can be reduced that warp threads on the Hold on to guide means (12), especially with certain ones Bindings and / or not correctly separated warp threads.

In a modified embodiment it is provided that the guide part (13) in mirror image on the upper flat side the gripper belt (1) is attached so that its approach then between the gripper belt (1) and the gripper (2 or 3) located.

11 and 12 is the gripper belt (1) widened by means of a guide part (13) which is the same Strength as the gripper belt (1). On the gripper belt (1) is essentially a gripper in the center (2) appropriate. The guide part (13) protrudes on both sides the gripper belt (1) and is between the movable Guide means (12) and the weaving comb (9) laterally guided. On the side facing away from the weaving comb (9) forms an essential one Widening while it is facing the weaving comb (9) Forms only a narrow margin. The gripper belt (1) and the guide part (13) are only an intermediate profile (18) performed with the sley (8) in not shown Way is connected. The guide surface of the intermediate profile (18) has a preferably elastic coating (60) Mistake. On the intermediate profile (18) are by means of screws hook-shaped guide means (12) attached to their Cross bar over the top of the guide part up to the Gripper (2) extend so that they also the edge area cover the hook belt (1). The gripper belt (1) and the guide part (13) are laterally between the top projecting webs of the guide means (12) and the weaving comb (9) relatively big game. Because the crossbars of the guide means (12) over the guide part (13) and the gripper belt (1) stretches, this guide part and the gripper belt with sufficient certainty against an upward movement or prevented from rotating about its longitudinal axis. This too Widening has the advantage that the shed (14) in its Height does not have to be increased.

In the exemplary embodiment according to FIG. 11, the gripper belt slides (1) and the guide part (13) on the lower warp threads (20). The guide part can be released using screws and nuts (66) attached to the gripper (2 and 3). In other embodiments is the guide part only on a gripper or only on one Gripper belt (1) attached.

The embodiment of FIG. 13 differs from that Embodiment according to FIG. 11 essentially in that the guide part (13) has a greater height than the gripper belt (1). The hook-shaped guide means (12) thus serve only as a guide for the guide part (13), without the upper one Touch the flat side of the gripper belt (1). This will make a Wear on the gripper belt (1) restricted. The guide part (13) engages over the edge of the gripper belt (1) in such a way that the hook-shaped guide means (12) as close as possible to the Gripper (2) can be brought up, which again in the is arranged substantially centrally on the gripper belt (1).

In the embodiment of FIG. 14, only the lower one Flat side of the gripper belt (1) from the coating (60) of the Intermediate profile (18) supported. The guide part (13) is located to the side of the rapier belt on the weaving comb (9) opposite side. It is made of C-shaped guide means (12) added the top and bottom of the guide member to lead between them.

In the embodiment according to FIG. 15, the support with a Sley movable guide means (12) the gripper belt (1) and the guide part (13) both on the upper flat side and on the lower flat side, i.e. on the lower flat sides. The guide part (13) has a greater strength than the gripper belt (1), on which a gripper (2) is centered again is arranged. The guide part (13) is in one of the side surfaces limited recess (61) performed so that this Guide means (12) the guide part (13) parallel to the Lead flat sides of the gripper belt and also perpendicular to it.

In the embodiment according to FIG. 16, the guide part (13) is with one down over the underside of the gripper belt (1) protruding approach (64) provided, the recesses of the movable Guide means (12) are assigned. These recesses form with a side flank (63) and an opposite Guide surface of the approach (64) of the guide part (13) one Lateral guidance.

As further shown in Fig. 16, it is also possible that Using the rapier belt on the side assigned to the weaving comb (9) a hook-shaped extension (67) of the guide part (13) widen. This hook-shaped approach (67) encompasses the movable ones Guide means (12) and thus also forms a security against lifting the gripper (2) and the gripper belt (1).

In a similar manner, the gripper (2) itself can also be used for such Guide elements attached to the movable Cooperate management means (12). For example, the hook-shaped approach (67) be part of the gripper. In another Modification is also shown in Fig. 16 that the Provide the gripper with a strip-shaped guide attachment (68) which is assigned to the upper edge of the guide means (12).

The above exemplary embodiments have been used to explain that a guide part (13) in the area of the gripper (2 or 3) the gripper belt is provided. It goes without saying also possible in addition to such a guide part or several similar guide parts distributed over the length of the To provide gripper belt (1).

Claims (13)

1. A rapier weaving machine with at least one rapier (2, 3) which is positioned on a rapier belt (1) which can be introduced into a shed and drawn out of a shed and is guided inside the shed by means of mobile guide means (12) which can be introduced into the shed and drawn out of the shed, whereby a guide section (13) is provided in the area of the rapier (2, 3) which extends the rapier belt (1) on at least one side, whereby the guide means (12) which have guides which correspond to the rapier belt (1) and the guide section (13) are positioned in a row one behind the other, characterised in that these guide means each have at least two guides, of which one guide (37) corresponds to the upper section (35, 34) of the rapier belt (1) and one guide (38, 32) corresponds to the lower section (36) of the rapier belt (1), that at least one of these guides corresponds to both the rapier belt (1) and the guide section (13), and that the guide section (13) has facing guide surfaces which, together with the guides (31, 33) on the guide means (12), form a lateral guide for the guide section (13).
2. A rapier weaving machine in accordance with Claim 1, characterised in that the distances between the mobile guide means (12) in the longitudinal direction of the rapier belt (1) are matched to the length of the guide section (13) in such a way that at least two guide means (12) engage simultaneously with the guide section (13).
3. A rapier weaving machine in accordance with Claim 1 or 2, characterised in that there are stationary guide means (11) positioned outside the shed (14) which guide the rapier belt (1) at an angle and perpendicular to its flat sides and which have recesses which stand at a distance from the guide surfaces on the guide section (13).
4. A rapier weaving machine in accordance with Claim 3, characterised in that the stationary guide means (11) and the mobile guide means (12) are fitted with guides which correspond to guide surfaces located at various points on the rapier belt (1).
5. A rapier weaving machine in accordance with one of Claims 1 to 4, characterised in that the mobile guide means (12) contain hook-shaped elements which hook over the top of the guide section (13) and the rapier belt (1).
6. A rapier weaving machine in accordance with Claim 5, characterised in that the hook-shaped guide means are fitted to a batten section (18), the top of which forms a guideway for the rapier belt (1) and/or the guide section (13).
7. A rapier weaving machine in accordance with one of Claims 1 to 6, characterised in that the mobile guide means (12) are provided with separate guides which correspond on one hand to the bottom of the rapier belt (1). and on the other to the bottom of the guide section (13).
8. A rapier weaving machine in accordance with one of Claims 1 to 7, characterised in that the guide section (13) has a strip-shaped guide body which projects beyond the rapier belt (1) in such a way that it has four guide surfaces running parallel in pairs, each of which corresponds to guides on the mobile guide means (12).
9. A rapier weaving machine in accordance with Claim 8, characterised in that the guide section (13) is provided with a recess at the side next to the rapier belt (1) into which a guide projection on the stationary guide means (11), which forms a guide (3) for a side (26) of the rapier belt (1), projects.
10. A rapier weaving machine in accordance with one of Claims 1 to 9, characterised in that a lateral edge of the rapier belt (1) is held by C-shaped guides (27, 28, 29) on the stationary guide means (11).
11. A rapier weaving machine in accordance with one of Claims 1 to 10, characterised in that the guide section (13) projects beyond the rapier belt (1) on both sides and is guided laterally between the mobile guide means (12) and a comb (9).
12. A rapier weaving machine in accordance with one of Claims 1 to 11, characterised in that a projection in the guide section (13) is placed in a recess in the rapier belt (1) which lies outside the area of the guide surfaces (25, 29) corresponding to the stationary guide means (11).
13. A rapier weaving machine in accordance with one of Claims 1 to 12, characterised in that the rapier belt (1) has an uninterrupted edge on the side facing the comb (9).

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