JP2008506855A - Held frame with hold bar - Google Patents

Abstract

A variant of a heald frame having an upper frame member (10), a lower frame member (11), and heald bars (17, 18) attached to the frame members, wherein the frame member (10) extends longitudinally. A rib (24) is provided, and the heald bar (17) has a single profiled longitudinal groove (25) for gripping the profiled rib.
[Selection] Figure 6

Description

  The present invention relates to a heald frame having at least one frame member and at least one heald bar attached to the frame member.

  Different materials are usually selected for the frame member and the heald bar to meet conflicting requirements. That is, the heald frame must on the one hand be as light as possible in order to allow high weaving speeds and on the other hand the shape stability and bending stiffness should be as great as possible. For this reason, the frame member is preferably manufactured from a lightweight material as a hollow profile in order to achieve the greatest possible bending stiffness. In contrast, heald bars that are adapted to the shape of the heald and that are subject to wear by the movement of the heald are manufactured from as hard an abrasion resistant material as possible, in particular steel. Since the frame member and the heald bar are made of different materials, various problems occur when the heald bar is attached to the frame member.

  It is known to attach a heddle bar to a frame member using rivets or the like and other attachment means (US Pat. No. 3,151,634). These mounting elements are prone to failure due to the relatively high risk of damage, especially fatigue fracture, due to the different materials and high acceleration forces.

In the known construction method (US Pat. No. 3,754,577), the frame member is an extruded profile made of aluminum alloy. The upper frame member includes a flange protruding downward, and the lower frame member includes a flange protruding upward. Protruding from these flanges is a longitudinally extending web between which is formed a groove for receiving the central web of the T-shaped heald bar. The central web of the heald bar is glued into this groove. In order to ensure that the adhesive is evenly distributed, the flange web of the frame member is provided with a plurality of protrusions. The frame member and heald bar are inserted into the press and held so that no relative movement can occur when the adhesive is thermoset at about 120 ° C.
U.S. Pat. No. 3,151,634 U.S. Pat. No. 3,754,577

  The present invention was made with the object of obtaining a heald frame of the type described at the beginning, which can be made without a press or a jig, etc., and is provided with a simple and reliable connection between the frame member and the heald bar. It is.

  This problem is solved by providing the frame member with one profiled rib extending in the longitudinal direction and having a profiled groove with a profiled groove that holds the profiled rib.

  The deformed ribs can be dimensioned without problems with such a strength that the risk of damage is relatively small. The material of the heddle bar has a relatively high hardness, so the flutes provided in the heddle do not pose a great risk of damage.

  In an advantageous embodiment of the invention, the profiled ribs of the frame member and the profiled flutes of the heald bar form a form-engaged connection transverse to the longitudinal direction. The coupling by such shape engagement allows the frame member and the heald bar to be accurately aligned with each other without the need for a press or jig or template during assembly. In doing so, it is very advantageous if the profiled ribs of the frame member form a snap-fit with the profiled flutes of the heald bar. Such a snap-on connection allows a particularly simple assembly.

  In another embodiment of the present invention, the profile rib of the frame member is bonded to the longitudinal groove of the heald bar. An adhesive, such as a thermosetting adhesive, improves the stability of the bond between the frame member and the heald bar. At that time, the play adjusts the play between the deformed rib and the longitudinal groove by the adhesive, but the positioning of both is not necessary, and the position of both is fixed by the coupling by the shape engagement.

  Other features and advantages of the present invention will become apparent from the following description of exemplary embodiments illustrated in the drawings.

  The heald frame as shown in FIG. 1 has a frame made up of an upper frame member 10, a lower frame member 11, and side members 13, 14 that couple them together. The upper and lower frame members 10 and 11 have flanges 15 and 16 protruding downward and upward, respectively, to which heald bars 17 and 18 are attached. The heald bars 17 and 18 receive loops 19 and 20 of the heald 21, and the heald 21 is provided with a thread hole 22 through which the warp passes.

  Due to the generally high weaving speeds today, efforts are made so that such heald frames are on the one hand as light as possible and on the other hand have as much bending stiffness or deformation resistance as possible. Since the loops 19, 20 are guided with play on the heald bars 17, 18 for handling reasons, the heald bars 17, 18 must be made of a material that is as wear resistant as possible. In practice, the frame members 10, 11 are preferably manufactured from light metal extruded profiles, i.e. from aluminum or aluminum alloy profiles. As can be seen from FIG. 2, in this exemplary embodiment, the frame member has a flat rectangular cross-section, with its long sides extending in the direction of motion, i.e. in the vertical direction. In this exemplary embodiment, the frame member 10 has four hollow chambers, which can optionally be further filled with reinforcement inserts or damping inserts. From the upper frame member 10, a flange 23 projects downwardly and is provided with a deformed rib 24. A heald bar 17 is attached to the deformed rib 24, which is a flat rail having one deformed longitudinal groove for holding the deformed rib 24. In FIG. 3, the deformed rib 24 having the end region 26 widened in the shape of an arrow is shown enlarged.

  The heddle bar 17 is an extruded shape steel, which is first extruded into a shape as shown in FIG. The heald bar 17 initially has one longitudinal groove 25 ′ having a rectangular cross section, and both side surfaces thereof are extended by longitudinal ribs 27, 28 protruding from the rail contour shape which is flat as such. Yes. Subsequently, these longitudinal ribs 27, 28 are plastically deformed by cold rolling so as to fit within the contour shape of the rail, thereby providing a straight and smooth surface. In doing so, these longitudinal ribs 27, 28 are pushed into longitudinal grooves 25 ′ which were perpendicular at that time, thereby undercutting longitudinal grooves 25 as shown in FIG. 5. Is obtained. As can be seen from FIGS. 4 and 5, the cross section of the vertical rib 28 is slightly smaller than the vertical rib 27. As a result, a groove side surface 29 that intersects the groove bottom portion at an acute angle than the angle formed by the groove side surface 30 of the rolled vertical rib 28 with the groove bottom portion of the vertical groove 25 is obtained in the region where the vertical rib 27 was previously present. become. Since the width of the groove bottom of the longitudinal groove 25 is slightly wider than the outer end of the arrow-shaped portion 26 of the deformed rib, the heald bar 17 can be hooked on the deformed rib 24 by the groove side surface 29 and then pressed against the deformed rib 24. At that time, the groove side surface 30 comes to be locked (snap-on) with the irregular shaped rib.

  In order to make the bond between the heald bar 17 and the frame member 10 more stable and in particular to eliminate play and thereby eliminate the generation of noise, an adhesive, for example thermosetting, is required before snapping the heald bar 17 into the longitudinal groove 25. Apply adhesive. Even if the adhesive action of this adhesive is lost over time, its ability to adjust play is maintained as long as the adhesive is there. The loss of adhesive action over time may be advantageous for removal of heald bar 17. Therefore, it is possible to intentionally use an adhesive that loses its adhesive action after a predetermined time.

  In one modified embodiment, the undercut vertical groove 25 is formed in the contour shape of the heald bar 17 by milling or standing.

  The lower frame member 11 has the same cross-sectional shape as the upper frame member, and is arranged symmetrically, that is, the flange 23 of the upper frame member 10 faces the corresponding flange of the lower frame member. The hold bar 18 has the same shape as the hold bar 17 and is attached in the same manner. At that time, the groove side surface 29 having an acute angle comes to the lower side, that is, the heald bar 18 is arranged symmetrically with the heald bar 17.

  In another alternative embodiment, the profile rib 24 is not solidly configured but has one hollow chamber extending longitudinally. In yet another alternative embodiment, the heald bars 17, 18 are not snapped onto the profiled ribs 24, but are slid and fitted in the longitudinal direction. In the case of this exemplary embodiment, the play between the profile of the profile rib 24 and the profile flutes 25 can be relatively small.

  The adhesive can be applied by applying an adhesive to the surface of the deformed rib 24 and / or the inner surface of the deformed groove 25 before joining the deformed rib 24 and the deformed longitudinal groove 25. In a variant embodiment, the heald bars 17, 18 are provided with a plurality of holes which are open at the bottom of the longitudinal groove 25 and are spaced apart from each other. In this case, after assembling, the adhesive can be pushed through these holes and applied to the opposite surfaces of the deformed rib 24 and the longitudinal groove 25.

  In the embodiment shown in FIGS. 6 to 8, the flange 23 ′ of the frame member 10 is provided with a deformed rib 24 ′ that is wider than the front end portion formed in the shape of an arrowhead. The loop 19 of the heald 21 is formed in a C shape and holds the heald bar 17 from above and from below. In the exemplary embodiment shown in FIG. 6, heald 21 follows heald bars 17 and 18 when the heald frame is raised and lowered. In the exemplary embodiment of FIG. 7, a damping strip 31 made of plastic or the like is provided opposite the end of the loop 19 of the heald 21. The hold bars 17, 18 and the loop 19 are dimensioned so that the end of the loop 19 of the heald 21 contacts the damping strip 31 of the upper frame member 10 or the lower frame member 11 when the heald frame is raised and lowered. In this case, the heald bars 17 and 18 have only a function of guiding the heald in the lateral direction with respect to the movement of the heald frame. In this case, the heald bar can be made of aluminum or aluminum alloy.

  In the embodiment shown in FIG. 8, the heald 21 comprises a J-shaped loop 19 '. The hold bar 17 'has a shape corresponding to this loop, and extends from the longitudinal groove 25' only on one side, that is, toward the frame member to which it is attached.

  The present invention is not limited to the exemplary embodiments shown. In particular, regarding the configuration of the loop 19 of the heald 21, various modifications can be applied to the shapes of the heald bars 17 and 18. The same applies to the shape and arrangement of the strip-shaped damping element 31. Similarly, for the material of the upper and lower frame members 10 and 11, materials other than aluminum or aluminum alloys, particularly plastics reinforced with fiber reinforced plastic, such as carbon fiber or Kevlar fiber, can also be used. Similarly, other materials, particularly high strength, low wear plastics, are possible for the heald bars 17,18. The invention is also suitable for a heald frame in which only one of the frame members 10 or 11 has a heald bar 17 or 18 attached thereto.

FIG. 3 shows a heald frame according to the present invention. It is sectional drawing along line II-II of FIG. It is an expanded sectional view of the unusual shape rib of a frame member. FIG. 6 is a cross-sectional view of a heald bar that does not yet have a final shape. FIG. 5 is a cross-sectional view of the heald bar of FIG. 4 after processing into a final shape. FIG. 3 is an enlarged partial sectional view similar to FIG. 2. It is the fragmentary sectional view similar to FIG. 6 with which the shape for damping was added. FIG. 6 is a partial cross-sectional view of an embodiment of a heald having a J-shaped loop.

Explanation of symbols

10 Upper frame member 11 Lower frame member 13 Side member 14 Side member 15 Flange 16 Flange 17 Held bar 17 'Held bar 18 Held bar 19 Loop 19' Loop 20 Loop 21 Held 22 Thread hole 23 Flange 23 'Flange 24 Deformed rib 24' Deformed rib 25 Modified vertical groove 25 'Modified vertical groove 26 End region, arrow-shaped portion 27 Vertical rib 28 Vertical rib 29 Groove side surface 30 Groove side surface 31 Damping strip

Claims (13)

  A heald frame having at least one frame member (10, 11) and at least one heald bar (17, 18) attached to the frame member (10, 11), the frame member (10, 11) Comprises one profiled rib (24, 24 ') extending longitudinally and the heald bar (17, 18) one profile flutes (25, 25) holding said profile rib (24, 24') ') Held frame, characterized by having.   The deformed ribs (24, 24 ') of the frame members (10, 11) and the deformed longitudinal grooves (25, 25') of the heald bars (17, 18) are transversely engaged with the longitudinal direction. The heald frame according to claim 1, characterized in that it forms a bond by   The deformed ribs (24, 24 ') of the frame members (10, 11) form a snap-type connection with the deformed longitudinal grooves (25, 25') of the heald bars (17, 18). The heald frame according to claim 1 or 2.   4. The method according to claim 1, wherein the irregularly shaped longitudinal groove (25, 25 ′) is undercut, and the irregularly shaped rib (24, 24 ′) has a cross-sectional shape adapted thereto. The heald frame according to one item.   5. Held frame according to claim 4, characterized in that the connection between the profiled ribs (24, 24 ') and the profiled flutes (25, 25') is configured in the shape of an arrowhead.   6. Held frame according to any one of claims 1 to 5, characterized in that the frame member (10, 11) is an extruded profile, in particular an aluminum or aluminum alloy profile.   7. A heald frame according to any one of the preceding claims, characterized in that the heald bar (17, 18) is an extruded steel rod.   The heald frame according to claim 7, wherein the extruded bar is post-processed by cold rolling.   The rods of the heald bars (17, 18) are provided with ribs (27, 28) on both sides of a longitudinal groove (25 ') which is substantially rectangular, the ribs preferably in the longitudinal groove (25) by cold rolling. 9. A heald frame according to claim 7 or 8, characterized in that it is pushed into the frame.   The heald frame according to claim 9, characterized in that the cross-section of one of the ribs (28) is smaller than the other rib (27).   From the claim 1, characterized in that the deformed ribs (24, 24 ') of the frame member (10, 11) are glued to the longitudinal grooves (25, 25') of the heald bar (17, 18). The heald frame according to any one of 10.   12. A frame according to claim 1, characterized in that the frame member (10, 11) is made of a first material and the heald bar (17, 18) attached thereto is made of a second material. The heald frame described in the section.   A frame having one upper frame member (10) and one lower frame member (11) is provided, wherein one heald bar (17, 18) is attached to each frame member. Item 13. The heald frame according to any one of Items 1 to 12.

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