EP0152826A1 - Guiding device for the parts of a loom which are driven by pushing, more especially dummy shuttle looms - Google Patents

Abstract

A guide for parts of a loom, in particular projectile looms, which move in a thrust manner, with a body which can be moved back and forth with respect to at least one guideway. At least one guide member is assigned to the body and / or the guideway. The guide member and / or the body is movable transversely to the longitudinal direction of the guide track.

Description

The invention relates to a guide for parts of a weaving machine that move in thrust fashion, in particular projectile weaving machines, with a body that can be moved back and forth with respect to at least one guideway.

Such guides are e.g. in CH-PS 313 155 (T.162), in CH-PS 636 655 (T.547) and in US-PS 4 415 010 (T.576). The rigid body, which can be moved back and forth with respect to the guide groove or guide rail, is acted upon more or less eccentrically and tends to incline or tilt, so that edge or, in extreme cases, point contact with so-called "seizure" occurs between the guide surfaces. This results in increased surface pressure as well as extreme wear, as proper lubricant film formation can no longer be guaranteed with the high surface pressures that occur.

The object of the invention is to improve the guide mentioned at the outset so that tilting is avoided and also with great eccentricity of the forces acting on the body, a parallelism of the guide surfaces and thus a uniform lubricating film is guaranteed.

To achieve this object, the measure is that at least one guide member is assigned to the body and / or the guideway, the guide member and / or the body being movable transversely to the longitudinal direction of the guideway.

As a result, it can be achieved that the guide surfaces of the guide member can adapt to the guide surfaces of the guide member essentially parallel, regardless of the position of the body with respect to the guide track, so that optimum surface sliding is ensured.

The guide member and / or the body can be movable by elastic deformation. This allows a particularly simple manufacture of the body with the guide members in one piece.

The body can have movable guide members in at least two planes running transversely to one another due to elastic deformation. This results in a particularly large guide surface and thus a correspondingly reduced surface pressure.

The guide members can be assigned to separate guideways. In this way, stable guidance can be achieved even with particularly large eccentric forces.

The guide members can also be articulated. In this way, a particularly high degree of mobility of the guide members can be achieved.

The guide members can be designed as interchangeable sliding blocks. This has the advantage that the body itself must be replaced if it is not worn.

The guide members can be articulated via ball joints. This gives the advantage of all-round mobility of the guide members relative to the guide surfaces.

The guide members can be further articulated via pins. This results in a particularly inexpensive production.

The guide members can be moved back and forth in a guide rail that can be moved laterally relative to a groove. This has the advantage that the body can be designed in a particularly simple manner with rigid guide members.

The guide members can be designed as slide shoes that can be plugged onto the body. This has the advantage of a particularly simple and quick replacement of the guide links when worn.

A rail can also be provided as the guideway, the profile of which forms a guide member that is movable by elastic deformation. Finally, flexible guide members can grip a rail by means of elastic deformation.

• Fig. 1 ein Ausführungsbeispiel der erfindungsgemässen Führung anhand einer Schlagvorrichtung für die Projektile einer Projektilwebmaschine,
• Fig. la ein Ausführungsbeispiel der erfindungsgemässen Führung anhand eines Projektilrückschiebers,
• Fig. 2 eine perspektivische, vergrösserte Darstellung der Führungsnut gemäss Fig. 1,
• Fig. 3 einen vergrösserten Schnitt gemäss der Linie III - III nach Fig. 1,
• Fig. 3a,b schematische Funktionsdarstellungen der Führung gemäss Fig. 3,
• Fig. 4 den Schnitt nach der Linie IV - IV nach Fig. la,
• Fig. 4a eine schematische Funktionsdarstellung der Führung gemäss Fig. 4,
• Fig. 5,6 ein Ausführungsbeispiel der Führung nach Fig. 1 mit Kugelgelenken,
• Fig. 6a,c eine Variante gemäss Fig. 5,6 mit losen Kugellagerkörpern,
• Fig. 7,8 eine Variante der Gleitsteine anhand Fig. 5,6,
• Fig. 9 eine entsprechende Variante mit gewölbten Gleitsteinen,
• Fig. 10 ein Ausführungsbeispiel mit einer bewegbaren Führungsschiene,
• Fig. 11,12 ein Ausführungsbeispiel mit an Zapfen angelenkten Führungsgliedern,
• Fig. 13 eine entsprechende Variante mit gewölbten Gleitsteinen,
• Fig. 14,15 eine Ausführung mit aufsteckbaren Gleitschuhen, und
• Fig. 16,17 Ausführungsbeispiele mit schienenartigen Führungsbahnen.

The invention is explained in more detail using exemplary embodiments in conjunction with the drawing below. Show it:

• 1 shows an embodiment of the guide according to the invention using a striking device for the projectiles of a projectile weaving machine,
• FIG. 1 a shows an exemplary embodiment of the guide according to the invention using a projectile retractor,
• 2 is a perspective, enlarged view of the guide groove according to FIG. 1,
• 3 is an enlarged section along the line III - III of FIG. 1,
• 3a, b are schematic functional representations of the guide according to FIG. 3,
• 4 shows the section along the line IV - IV according to FIG.
• 4a is a schematic functional representation of the guide according to FIG. 4,
• 5,6 an embodiment of the guide according to FIG. 1 with ball joints,
• 6a, c a variant according to FIG. 5.6 with loose ball bearing bodies,
• 7,8 shows a variant of the sliding blocks with reference to FIG. 5.6;
• 9 shows a corresponding variant with curved sliding blocks,
• 10 shows an embodiment with a movable guide rail,
• 11, 12 shows an exemplary embodiment with guide members articulated on pins,
• 13 shows a corresponding variant with curved sliding blocks,
• Fig. 14,15 an embodiment with attachable sliding shoes, and
• 16, 17 exemplary embodiments with rail-like guideways.

In a striking device for the projectiles of a projectile weaving machine, a striking lever 10 (FIG. 1) is articulated via a pivot pin 12, a thrust plate 14 and a bolt 16 to a striking piece 18 which has a recess 20 for the purpose of reducing weight. The striking piece is guided in a guide groove 21 serving as a guideway in the projectile direction. The bolt 16 has a striking nose 22 for the projectile 24 as a direct extension. A striking mechanism (not shown) moves the striking lever 10 to the end position marked by dash-dotted lines in accordance with arrow 26, the projectile 24 being accelerated accordingly.

In the case of a projectile slide back, a slide back lever 32 is mounted in the housing 28 (FIG. 1 a) of a catch mechanism 30, which lever is pivoted back and forth according to arrow 34 by conventional means, not shown. On the return lever 32 is a bolt 36, a tab 38 and one Bolt 40 is articulated a projectile return slide 46 consisting of a holder body 42 and a stop part 44, the stop part 44 being fastened to the holder body 42 by means of a rivet 48. The stop part 44 acts with its stop surface 50 on the projectile 24 braked by the catch brake 52. The holder body 42 is guided in a guide groove 43. During operation, the return slide 46 moves with the holder body 42 according to arrow 54 between the front position shown and the rear position 56 indicated by dashed lines. The projectile can reach the mentioned rear position during the braking process, depending on the braking effect.

3, the striker 18 has a body 58 with guide members 60, 62, the latter being movable by elastic deformation of the profile points 64, 66. 3a, b show an exaggerated representation of the deformation when the body rotates about the axes of rotation X and Y according to FIG. 2. The play S1 between the guide member 60 and the groove 21 is approximately 0.2 mm.

4, the projectile return pusher 46 has additional guide members 68, 70 in planes running transversely to the guide members 60, 62, which are assigned to a separate guide groove 72. 4a (rotation of the body 58 about the axis X according to FIG. 2), the guide members 68, 70 serve to additionally stabilize or enlarge the contact surfaces and thus reduce the surface friction in the lubricating film.

5, 6, the body 74 has ball pins 76, 78, on which upper and lower sliding stones 80, 82 are articulated.

In the variant according to FIGS. 6a-c, which simultaneously serve as a schematic functional representation according to FIGS. 5, 6, loose ball bearing bodies 86 are provided instead of the ball pins 76, 78, which in corresponding recesses 88, 90 on the body 74 or on the Sliding blocks 80, 82 are mounted. The play S2 is approx. 0.2 mm.

In the variant according to FIGS. 7, 8, the sliding blocks 92 have bevels 94 to improve the sliding properties. In addition, recesses 96 are provided for the purpose of saving weight and thus reducing the moments of inertia, as a result of which the mobility of the sliding blocks is additionally increased.

In the variant according to FIG. 9, the sliding blocks 98 have a cylindrical outer surface 100, for the additional improvement of the sliding properties.

In the exemplary embodiment according to FIG. 10, the impact piece 18 has a body 102 with guide members 104, 106, which are each displaceable on a plastic rail 114, 116 which can be moved laterally in the groove 108 according to arrows 110, 112 by the play S3. The game S3 is about 0.3 mm while the game S4 is about 0.2 mm.

11, 12, the sliding blocks 80, 82 are articulated to cylindrical pins 118, 120 on the body 74. The body 74 is thus only movable according to FIG. 6c.

In the variant according to FIG. 13, the sliding blocks 122, 124 approximately analogous to FIG. 9 on a cylindrical outer surface 100 and are mounted in a corresponding guide surface having groove 126.

In the exemplary embodiment according to FIGS. 14, 15, sliding shoes 129 made of plastic or metal are provided as guide members on the body 128, which are easily exchangeable when worn.

In the exemplary embodiment according to FIG. 16, a rail 130 is provided as the guideway, the profile 131 serving as a guide member is encompassed by the legs 132, 134 of the striking piece 136. Due to the elastic deformation at the profile points 64, 66, the guide member 131 with the impact piece 136 can e.g. move across to the dash-dotted position.

Analogously, the leg-like guide members 138, 140 of the body 142 in the exemplary embodiment according to FIG. 17 can be moved transversely to the longitudinal direction through the profile points 142, 144 by elastic deformation, it being possible for the profile of the rail 133 to be rigid.

It goes without saying that the designs described above with sliding blocks movable in guide grooves can also be transferred to the designs analogous to rails according to FIGS. 16, 17.

Claims (12)

1. Guide for thrust-like moving parts of a weaving machine, in particular projectile weaving machine, with a body that can be moved back and forth with respect to at least one guideway, characterized in that at least one guide member is assigned to the body and / or the guideway, the guide member and / or the body is movable transversely to the longitudinal direction of the guideway. 2. Guide according to claim 1, characterized in that the guide member and / or the body is movable by elastic deformation. 3. Guide according to claim 1, characterized in that the body has movable guide members in at least two mutually transverse planes by elastic deformation. 4. Guide according to claim 1, characterized in that the guide members are assigned separate guideways. 5. Guide according to claim 1, characterized in that the guide members are articulated. 6. Guide according to claim 5, characterized in that the guide members are designed as interchangeable sliding blocks. 7. Guide according to claim 5, characterized in that the guide members are articulated via ball joints. 8. Guide according to claim 5, characterized in that the guide members are articulated via pins. 9. Guide according to claim 1, characterized in that the guide members can be moved back and forth in a guide rail which is laterally movable relative to a groove. 10. Guide according to claim 1, characterized in that the guide members are designed as slide shoes which can be plugged onto the body. 11. Guide according to claim 1, characterized in that a rail is provided as the guide track, the profile of which forms a movable guide member by elastic deformation. 12. Guide according to claim 1, characterized in that movable guide members encompass a rail by elastic deformation.

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