EP1799894B1 - Guide elements for gripping transport means of a loom - Google Patents

Description

The invention relates to a guide element for a gripper transport element of a weaving machine with first guides and with second guides, which together form a positive, one-sided open receptacle for the gripper transport element.

Gripper transport elements are gripper bars or gripper bands, which are introduced from one side of the loom forth in a shed and thereby introduce a weft. The gripper conveyor elements move with the gripper either to the opposite side of the shed or to the middle of the shed, where they meet on a also transported by a gripper conveyor transfer tang, which takes over the registered weft thread and holds or from the middle of the shed to the opposite side transported further. The gripper conveyor elements are guided within the shed by means of guide elements. These guide elements are attached to the sley and are moved with the Webladenbewegung in a shed and moved back out. They penetrate the lower warp thread of a shed.

It is known ( EP 0 275 479 B1 The hook-shaped guide elements which serve to guide a gripper conveyor element designed as a gripper belt have a guide associated with the upper side of the gripper conveyor element and one of the underside of the gripper conveyor element associated guide and a side facing away from the open side guide associated with a side surface of the rapier band is. The lower and / or the upper guide engage in a longitudinal groove of the upper side or the lower side of the rapier band, so that the side wall of the longitudinal groove facing the open side of the guide elements is guided on a guide of the guide elements running perpendicular to the upper side and to the lower side. This guide and the associated guide surface of the rapier band, which is intended to avoid a horizontal deflection of the rapier band in the direction of the open side of the guide elements and thus to the reed, is relatively small. This results in the guide elements and especially but also on the gripper conveyor elements in a relatively short time severe wear.

It is also known ( WO 94/103 64 ) To provide guide elements which have a C-shape and are also open to the reed. The gripper transport element, which may also be a flexible rapier band in this case, is guided on the open side of the guide elements by means of two angled portions of the guide elements against dodging in the horizontal direction. The top and bottom of the gripper transport element maintain a distance to the opposite regions of the guide elements. The gripper transporting member is provided with a passing through the open side of the guide members portion which is guided between the opposite portions of the guide elements in the vertical direction. Even with this design, only relatively small guide surfaces are present in particular in the direction of the reed, so that a fairly rapid wear is to be expected.

The invention has for its object to provide guide elements of the type mentioned, in which effective guides are increased in the horizontal direction.

This object is achieved in that at least one projection protrudes inwardly from the first guides associated with the underside and / or the upper side of the gripper conveying element, which at least one projection complements the second guides with at least one of its side edges.

By one or more such projections, which engage in longitudinal grooves of the gripper transport element, the size of the guides effective in the horizontal direction can be increased, so that further surfaces of the gripper transport element can be utilized as guide surfaces. This makes it possible to reduce wear and to improve the guidance of the gripper transport element. It is possible to provide relatively large guides of the guide elements and correspondingly large guide surfaces on the gripper conveyor elements and yet to keep the cross section of the gripper conveyor elements small or to reduce them compared to the previously customary sizes. A reduction in the cross-section of the gripper conveyor elements leads to a reduction in the mass to be moved, which is advantageous for high operating speeds.

In an embodiment of the invention it is provided that the guides form a substantially C-shaped frame. Thus, relatively large guides are already possible from the basic structure.

Fig. 1

zeigt eine Ansicht eines Führungselementes und einen Schnitt entlang der Linie I-I der Fig. 3 durch ein Greifertransportelement,

Fig. 2

die Ansicht des Führungselementes nach Fig. 1 und einen Schnitt entlang der Linie II-II durch das Greifertransportelement der Fig. 3,

Fig. 3

eine Ansicht der Unterseite eines Greifertransportelementes,

Fig. 4

eine Ansicht eines abgewandelten Führungselementes und einen Schnitt durch ein diesem zugeordnetes Greifertransportelement,

Fig. 5

eine Ansicht eines Führungselementes mit weiter vergrößerten, in horizontaler Richtung wirksamen Führungen und

Fig. 6 bis 19

weitere Ansichten von erfindungsgemäßen Führungselementen.

Further features and advantages of the invention will become apparent from the following description of the embodiments illustrated in the drawings and the dependent claims.

Fig. 1

shows a view of a guide element and a section along the line II of Fig. 3 by a gripper transport element,

Fig. 2

the view of the guide element after Fig. 1 and a section along the line II-II through the gripper transport element of Fig. 3 .

Fig. 3

a view of the underside of a gripper transport element,

Fig. 4

a view of a modified guide element and a section through a gripper conveyor associated therewith,

Fig. 5

a view of a guide element with further enlarged, effective in the horizontal direction guides and

Fig. 6 to 19

further views of guide elements according to the invention.

In the Fig. 1 and 2 Guide elements 10 shown, which are mounted in a row behind the other on a sley, have a C-shape and are open to a not shown, also attached to the sley reed out. They serve to guide within a shed a gripper transport element 11, which is designed as a gripper bar or gripper belt.

In Fig. 1 and 2 and in 4 to 18 the guide elements are shown in their operating position, ie when they are attached to a sley and the sley is in the position in which a gripper transport element is inserted into a shed and thereby guided by the guide elements. The other positions they take when the sash is pivoted are not shown.

The guide elements each have a guide 12 which is associated with the top of the gripper conveyor element 11, and a guide 13 which is associated with the underside of the gripper conveyor element 11. Between these guides 12 and 13, a guide 14 is provided on the closed side of the guide elements 10, which in the embodiment extends perpendicular to the guides 12, 13 and which is associated with a side surface of the gripper conveyor element 11. On the opposite side of the guide 14, the guides 12 and 13 go over at right angles to extending sections that form guides 15, 16, whose height corresponds to about one third of the guide 14. The guides 12, 13, which are associated with the top and the bottom of the gripper conveyor element 11, serve as vertical guides, which prevent a deflection of the gripper conveyor element 11 in the vertical direction. The guides 14 on one side and the guides 15, 16 on the other side serve as horizontal guides, which prevent deflection of the gripper conveyor element 11 in the horizontal direction. The guides 12, 13, 14, 15 and 16 form a receptacle which secures the gripper transport element in a form-fitting manner against deviations in the horizontal and vertical direction from the movement path and which is open on the side facing a reed, not shown. The total height of the guides 15, 16 is in the embodiment by a third smaller than the guide 14. This creates the risk that the gripper conveyor element 11 is exposed to the side of the guides 15, 16 an increased wear. In order to improve the avoidance towards the open side of the guide elements preventing guidance and to increase the overall height beyond the effective in this direction guides 15, 16, in the embodiment, the guide 13 is provided with an inwardly projecting projection 17 which engages in a longitudinal groove of the gripper conveyor element 11. The projection 17, which in the view Fig. 1 has a preferably rectangular shape, serves with its side edges as a complementary horizontal guide. For example the height of the projection 17 is selected so that the added height of the projection 17 and the guides 15, 16 at least approximately corresponds to the height of the guide 14.

In exemplary embodiments, a gripper transport member 11 will be configured as shown in FIG FIGS. 2 and 3 that is, that it has a widening 18 extending over the entire or a part A of its length, which remains outside of the guide elements 10. In this case, it is possible to make the sections of the guide elements on the guides 15, 16 opposite outer sides also as a guide, so that the available for the horizontal guide guides are further increased. In this case, there are two longitudinal grooves, ie a longitudinal groove on the upper side and a longitudinal groove on the underside, between the widening 18 and the part of the gripper conveying element 11 guided within the guide elements 10. The widening 18 may be a guide member which receives a gripper and is attached to the gripper transport member.

This in Fig. 4 Guide element 40 shown serves together with a plurality of successively arranged in a row guide elements 40 for guiding a gripper transport element 41, which is designed in particular as a rapier band. The gripper transporting member 41 has a substantially flat, rectangular shape so as to be more flexible with respect to a horizontal axis than a vertical axis. Thereby, the gripper transporting member 41 is well suited to be wrapped around a drive wheel rotating back and forth about a horizontal axis. The guide element 40 has a guide 42 assigned to the upper side of the gripper transport element 41 and a guide 43 extending parallel thereto and assigned to the underside of the gripper transport element 11. The guide element 40 is located on the guide rail 40 a reed, not shown, open side, so that the gripper transport element 41 protrudes slightly out of this page.

On the closed side of the guide element 40, a guide 44 is provided between the guide 42 and the guide 43, which runs perpendicular to the guides 42, 43 and is associated with a side surface of the gripper conveyor element 41. In order to obtain a horizontal guide against dodging in the direction of the open side of the guide element, projecting from the guide 43, two projections 45, 46 inwardly, which have a rectangular shape in the longitudinal direction of the gripper transport element 41 and in two longitudinal grooves engage the gripper transport element 41. The two longitudinal grooves and the two projections 45, 46 have the same dimensions in the embodiment and are arranged at the same distance from the longitudinal center plane of the gripper conveyor element 41. The height of the two projections, starting from the guide 43, corresponds in the embodiment at least half of the guide 44, so that on the side facing away from the guide 44 due to the added heights of the projections 45 and 46, a guide is present at least approximately Height of the guide 44 corresponds.

The embodiment of the guide elements 50 according to Fig. 5 corresponds in principle to the structure of the guide elements 40 after Fig. 4 , The underside of the gripper conveyor element 51 is associated with a guide 53, from which two projections 55, 56 protrude inwards. In addition, protruding from the top of the gripper transport member 51 associated guide 52 projections 57, 58 inwardly, which once again increase the horizontal guides. In this way, it is particularly easy to obtain an overall height of the horizontal guides, which prevent deflection toward the open side of the guide elements 50, which is greater than the height of the guide 54, which is associated with a side surface of the gripper transport member 51. Gripper transport elements in the form of gripper bars or gripper belts are driven by means of drive wheels which are provided with teeth which engage in holes 59 in a row of holes of the gripper bar or gripper belt. The gripper conveyor element 51 after Fig. 5 is provided in its longitudinal center with a row of holes holes 59 which extend from the top to the bottom of the Greifeitransportelements 51. The projections 55, 56 and 57, 58 are located outside the region of the row of holes, so that the holes 59 can extend over the entire height of the gripper transport element 51, ie are in a region which is not through a longitudinal groove or the like. is weakened. The same applies to the gripper transport element 41, which is provided in the region between the projections 45, 46 intended for longitudinal grooves with the holes of a row of holes. In a modified embodiment, it is provided that the depth of the holes corresponds to the height of the projections 45.

In the 6 and 7 shown guide elements 10 'differ from the guide elements 10 after Fig. 1 and 2 only in that in addition to the top of the gripper transport member 11 'associated guide 12', a projection 61 is provided. According to the embodiment 6 and 7 the projection 61 is arranged opposite the projection 17. He also has the same size. In a modified embodiment it is provided that the projections 17 and 61 in the transverse direction (transversely to the gripper transport element 11 ') are arranged offset. In a further modified embodiment, it is provided that the projections 17, 61 also have different dimensions.

As with the embodiment according to Fig. 8 (Which is essentially the embodiment of Fig. 4 corresponds) is shown, in the guide elements 80, the projections 85 and 86 not - as in the Embodiment after Fig. 4 - Be arranged symmetrically to the central longitudinal axis of the gripper transport member 81 and also do not have the same dimensions in terms of width and depth.

Fig. 9 shows an embodiment for guide elements 90, wherein from one of the top of a gripper transport member 91 associated guide 92 projects inwardly a projection 96 which is parallel to the located on the closed side of the guide member 90, perpendicular to the guide 92 extending guide 94. This projection 96 is offset from a projection 95, which protrudes from the guide 93, which is associated with the underside of the gripper transport element 91, inwardly.

Fig. 10 shows an embodiment of a guide element 10 ", which is a modification of the guide element 10 after Fig. 1 and 2 is. In this embodiment, it is provided that the gripper conveyor element 11 "an upper, the open side of the guide element 10" and thus a reed, not shown edge region an inclined guide surface, ie a guide surface obliquely to the horizontal and vertical, for example, at 45 ° , runs. The outer edge of the section with the guide 15 'of the guide element 10 ", which is assigned to this guide surface of the gripper transport element 11", is also aligned obliquely, preferably parallel to the guide 15'. The upper edge of the guide element 10 ", which is associated with the guide 12 for the top of the gripper transport element 11", also runs slightly obliquely upwards in the direction of the open side. The transition between the guide 15 'and the guide 12 associated outer edges is slightly rounded. It forms the highest point of the guide element 10 ". This design has advantages in penetrating a warp sheet, since the danger is relatively low that a warp thread is" caught ".

The gripper transport element 11 "can accordingly Fig. 1 to 3 be provided with a widening 18 which extends over a part A of its axial length.

In Fig. 11 an embodiment is shown, which is a modification of the embodiment according to Fig. 10 is. How out Fig. 11 As can be seen, the projection 17 'of the guide element 10 "" is somewhat wider. The gripper transport element 11 "is shown in the region of its widening 18. The guide element 10 "'is extended in the region of its the underside of the gripper transport element 11" associated guide 13 by means of a projection 25 on the between the guides 15', 16 located open side addition. The projection 25, which terminates pointedly forms with its top a guide 26 for the underside of the widening 18 and supports the widening 18 against torsional forces.

The guide element 50 'of Fig. 12 differs from the guide element 50 of the Fig. 5 in that it is provided only with a projection 58 which is associated with the upper side of a gripper transport element 51 '. The guide element 50 'can be used to corresponding gripper conveyor elements 51 Fig. 5 or also gripper transport elements 51 'accordingly Fig. 12 respectively.

The embodiment according to Fig. 13 corresponds to the embodiment according to Fig. 5 with the difference that the guide element 50 "on the open side is provided with a projection 25 which is a complementary guide 26 for the receptacle formed outside the guides and which supports the underside of the gripper-conveying element 51 protruding from the receptacle Guide element 90 'of Fig. 14 corresponds in principle to the guide element 90 of the Fig. 1 , In addition, a bottom 25 of the gripper transport member 91 associated approach 25 is also provided in this embodiment, the outside of the open side of the guides 92, 93, 94, 95, 96th enclosed receptacle forms a guide 26 for the gripper transport element 91 '. As in Fig. 14 can be seen, the projection 96 'of the top of the gripper transport member 91' associated guide 92 down over half the strength of the gripper transport member 91 'addition, so that from the projections 95, 96' of the guide 94 opposite guides are formed that are higher than the guide 94.

In FIGS. 15 and 16 Guide elements 10 are shown which differ from the exemplary embodiment Fig. 1 and 2 only differ in that an additional approach 25 is provided, which forms a guide 26, the widening 18 'of the Fig. 15 and the widening 18 "of the Fig. 16 assigned. As FIGS. 15 and 16 further show, the widening 18 does not have as in the embodiment according to Fig. 2 have the same thickness as the remaining part of the gripper transport element 11. Rather, the widening 18 'may have a smaller thickness or the widening 18 "may have a greater thickness Fig. 16 is guided by means of the guide 26 and by means of the substantially perpendicular to the outside of the guide 15 forming portion of the guide member 10, the bite rider 18 "is supported in both directions according to torsion about the longitudinal axis.

The guide element 10 of the embodiment according to FIGS. 17 and 18 again corresponds in principle to the guide element 10 after Fig. 1 and 2 , In addition, it is provided that in the open side of the opposite guide 14, a recess 28 is provided which is associated with a longitudinal rib 29 of the gripper conveyor element 11. This makes it possible, in the gripper transport element 11 in the region of its neutral plane (at a bend about a horizontal axis), the number of reinforcing inserts of carbon fibers or aramid fibers or Glass fibers or the like to increase and provide for this, a greater width.

In Fig. 19 a guide element 80 'is shown, which is essentially the embodiment according to Fig. 8 equivalent. Subsequent to the projection 86 an outwardly projecting lug 25 is provided, which forms a guide for the underside of the gripper transport element 81.

The measures described for the individual embodiments can of course also be used in each case with the other embodiments. So it is possible, even in the embodiments according to Fig. 1 and 2 or 17, 18 Approaches to provide 25 with a guide 26, which support a lying outside the guide member portion of a gripper conveyor element. Likewise, in all embodiments, recesses 28 correspondingly FIGS. 17 and 18 are provided, which serve to guide a longitudinal rib of the gripper transport element.

According to the embodiments Fig. 1 to 18 The guide elements on both horizontal guides and vertical guides on. In a modified embodiment, it is provided that the guide elements are divided into individual guide elements, each of which exercises only one or two guiding functions. For example, the guide elements 40 after Fig. 4 is divided into three guide elements, one of which the top of the gripper transport member 41 associated guide 42, the guide 44 associated with a side surface of the gripper transport member 41 and the guide 43 associated with the underside of the gripper transport member 41. The projections 45, 46 are each their own guide elements, which are arranged to the guide element with said guides 42, 43, 44 in a lateral distance. In a modified embodiment, the guiding functions of the guides 42, 43 or 44 each transmitted their own guide elements. In most cases, however, guide elements will be preferred that contain all the guides, since then the number of guide elements and the contacts with warp threads are smaller.

The invention is not limited to the illustrated and described embodiments. Rather, modifications may be provided in particular with regard to the number and / or the size of the protrusions projecting from the guides.

Claims (12)

1. Guide element (10, 10', 10", 10"'; 40; 50, 50', 50"; 80, 80'; 90, 90') for a gripper transport element (11, 11', 11 "; 41; 51, 51'; 81; 91, 91') of a weaving machine with first guides (12, 13; 42, 43; 52, 53; 12', 13; 92, 93), and with second guides (14, 15, 16; 44, 46; 54, 55, 56; 94, 95, 96), which form with each other a positive receiver that is open on one side for the gripper transport element, characterized in that from the first guides (12, 13; 42, 43; 52, 53; 12', 13; 92, 93) associated to the lower side and/or the upper side of the gripper transport element (11, 11', 11 "; 41; 51, 51'; 81; 91, 91') at least one projection (17; 45; 55, 57; 85; 61; 95, 96) protrudes inwardly, which completes the second guides with at least one of its side edges.
2. Guide element according to claim 1, characterized in that the guides (12, 13, 14, 15, 16; 12', 13, 14, 15, 16) are associated to a gripper transport element (11, 11'), which has an essentially rectangular cross-section, wherein the guide (12, 12') associated to the upper side adjoins a guide (14) associated to one side surface of the gripper transport element and transforms into a guide (15) located on the open side associated to the upper edge area of the opposite side surface of the gripper transport element.
3. Guide element according to claim 1 or 2, characterized in that the guide (15') associated to the upper edge area of the gripper transport element (11") on the open side runs at an inclination to the horizontal and to the vertical.
4. Guide element according to claim 3, characterized in that the outer edge of the guide elements (10") in the area of the inclined running guide (15') associated to the upper edge area of the gripper transport element (11 ") also runs at an inclination to the horizontal and to the vertical and in particular parallel to the guide (15').
5. Guide element according to claim 1 or 4, characterized in that the guides (12, 13, 14, 15, 16) are associated to a gripper transport element (11, 11', 11 "), which has an essentially rectangular cross-section, wherein a guide (13) associated to the lower side adjoins a guide (14) associated to the side surface and transforms into a guide (16) associated to the lower edge area of the opposite side surface of the gripper transport element.
6. Guide element according to any one of claims 1 to 5, characterized in that the guide (15, 16) associated to the upper edge area and/or the lower edge area of the gripper transport element (11, 11', 11 ") is the inner edge of a section, whose outer edge also serves as a guide.
7. Guide element according to any one of claims 1 to 6, characterized in that the projection(s) (45, 46, 55, 56, 57, 58) protruding from the guide (43, 53) associated to the lower side and/or the upper side of the gripper transport element (41, 51) have the same width and/or the same height.
8. Guide element according to any one of claims 1 to 7, characterized in that the projections, which protrude from the guide associated to the lower side of the gripper transport element, have different dimensions in relation to the projections which protrude from the guide associated to the upper side.
9. Guide element according to any one of claims 1 to 8, characterized in that the projections (95), which protrude from the guide (93) associated to the lower side are arranged offset to each other in transverse direction in relation to the projections (96), which protrude from the guide (92) associated to the upper side.
10. Guide element according to any one of claims 1 to 9, characterized in that particularly in the elongation of the guide (13, 53, 93) associated to the lower side of the gripper transport element on the open side, a shoulder (25) is provided outside the receiver, which forms a guide (26) for the enlargement (18) of the gripper transport element, located outside of the receiver.
11. Guide element according to any one of claims 1 to 10, characterized in that the guide (14) for a side surface of the gripper transport element (11) opposite the open side has a recess (28) for receiving a rib (29) of the gripper transport element.
12. Guide element according to any one of claims 1 to 11, characterized in that several individual elements with different guide functions are provided, which are arranged to a distance besides one another.

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