JP4221400B2 - Shaft bar for shaft - Google Patents

Description

  The present invention relates to a shaft rod for a saddle shaft (heddle shaft) of a loom.

  Looms used in the textile industry generally include a saddle shaft, which is a frame-like structure, having upper and lower shaft bars that typically extend horizontally. Two shaft rods arranged in parallel are connected to each other at their ends by an end binding machine. The shaft rod may be, for example, an extruded aluminum shape member (contour member). The reed shaft carries a plurality of reeds provided with a thread for each warp in the middle. The eaves are fixed to shaft crosspieces that form part of the upper and lower shaft bars, respectively. The shaft crosspiece is, for example, a flat steel shape member on which the ridges rest on the ends of the shaft. The shaft crosspiece is riveted, for example, to the body of aluminum profile.

  The warp must move up or down from the warp plane in order to form a lace. For this reason, the saddle shaft moves upward or downward accordingly. Such movement occurs at a very fast operating speed. For this reason, and due to the necessary play of the kite on the shaft crosspiece, both the kite and the shaft crosspiece wear. Therefore, the shaft crosspiece must be made of a particularly resistant material, such as steel, as described above. On the other hand, the heel shaft must be as light as possible, so the shaft rod is made from the lightest material possible and then connected to the shaft crosspiece.

  Accordingly, it is an object of the present invention to provide a shaft bar that is easily installed and removed when necessary.

  The above object is achieved by a shaft rod according to claim 1.

The shaft rod according to the invention comprises a shape element (contour element) having at least one elongated depression and a shaft crosspiece provided with a fixing rib. The purpose of the fixing rib is to enter into the recess and be tightened tightly therein. Furthermore, the shaft rod is coupled to an elongated spring element that is introduced into the recess and tightly clamps the fixing rib therein. As a spring element, preferably an elongated elastomeric element, for example rubber bands are used. The elastic band, when loose, has a cross-sectional area that is greater than the width of the space in the recess freed from the fixing rib. The elastic band is elastic, and when it is stretched in the longitudinal direction, its cross-sectional area decreases. This stretchability is such that the rubber string has a cross-sectional area smaller than the width of the space in the recess free from the fixing rib in the stretched state. Thus, the spring element, which is composed of elastic band, acts as a simple, generally removable fixing element, which is inserted into the recess with a pre-tension in the longitudinal direction and then released. As a result, the spring element is loosened and the shaft crosspiece is firmly fixed to the shape element. Thus, the elastic band firmly seats the crosspiece of the shaft on the shape element. Furthermore, the spring element composed of elastic cords can have a damping effect. The magnitude of the stress applied by the rubber band is such that the shaft crosspiece cannot be moved on the shape element. This is true for all generated forces that affect the crosspiece of the shaft during normal operation.

  As mentioned above, the elastic band can have a vibration absorbing effect and thus a damping effect. In particular, high-frequency vibrations in the transition region between the shaft crosspiece and the shaft bar shape element are damped.

  The shape element is, for example and preferably, an extruded shape member made from a light metal such as aluminum. The recess formed in the shape element preferably has a slot-like opening extending longitudinally through which the fixing rib can project into the interior space of the recess. In such a device, the fixing ribs also extend along the entire length of the shaft crosspiece. The shaft rungs and shape elements can be several meters long.

  The recess is preferably a relief groove, that is, the width of the slot-shaped opening is smaller than the width of the internal space of the recess. The horizontal rail of the shaft is in close contact with the shape element at both edges of the slot-shaped mouth. In such an arrangement, and at this location, a belt-like seating surface is provided, which can be a flat surface located, for example, in a common plane or in a plane offset from each other.

  At least one seating surface for the fixing rib is formed in the recess. The seating surface may be flat or shaped. Depending on the shape that is formed, there is a shape anchoring connection between the crosspiece of the shaft, or more precisely between the fixing rib and the shape element.

  The seating surface and the fixing rib can engage directly with each other. However, it is also conceivable to place further functional elements between these two components, for example the brake element for the shaft crosspiece or the brake element for the rod carried by the shaft crosspiece. In this way, the spring element can be multifunctional in order to tighten not only the shaft crosspiece but also the further elements.

The spring element, preferably an elastic band, in its simplest form may have a circular cross-sectional area, which eliminates the need to pay attention to the slanted orientation of the elastic band or its slight twist. Becomes easier. However, it is also conceivable to use elastic bands shaped to have, for example, a square, rectangular, triangular or similar cross-sectional area by suitably configuring the internal contours of the fixation ribs and depressions. In this way, the seating of the shaft crosspiece on the shape element is further improved in certain situations .

  Furthermore, it is also conceivable to provide several spring elements for holding the fixing ribs on or in the shape element. In this way, the braking effect can be significantly increased. For example, two rubber strings are used, one on one side of the fixing rib and the other on the other side.

It is advantageous to apply a lubricating oil such as talcum, silicone grease, etc. to the rubber strap in order to facilitate the loosening of the rubber strap which is placed in the recess and still stretches. This does not affect the stability of the shaft crosspiece seating on the shape element. It is also conceivable to apply or coat anti-friction material only on the fixing ribs and / or on the corresponding surfaces of the shape elements present in the recesses, which can make it easier to loosen the elastic band.

  Furthermore, it is conceivable to use a lubricating oil that dissolves the surface of the rubber string. This lubricating oil can be, for example, a mineral oil that facilitates insertion of the elastic band into the recess and facilitates its loosening and leads to permanent adhesion to the surface of the elastic band, the recess. With such a device, the crosspiece of the shaft is held essentially unreleasable on the shape element.

  The length of the elastic band or other spring element is basically equal to the length of the shaft crosspiece and the shape element. If the elastic band does not loosen sufficiently after the elastic band is inserted into the recess, a part of the elastic band remains outside the recess. That is, at least one end protrudes from this. However, the end of the elastic band can swing in the recess due to the vibration of the horizontal rail of the shaft that occurs during operation.

  In an alternative form, it is conceivable to introduce the elastic band into the recess by simply compressing the local part. This can be done, for example, in an embodiment where the shaft crosspiece does not completely cover the recessed slot-shaped mouth. In such a device, the elastic band can be first pressed from the outside and then pressed into the recess by a finger-like blade or roller passing along the elastic band. As a further alternative, it is also conceivable to provide a shape element whose depression has at least one deformable wall. In this case, the elastic band is placed in the recess in the relaxed state through the slot-shaped mouth, and then one wall of the recess is bent inward. This can be done, for example, by passing a roller under pressure along each wall to bend towards the spring element. Also in this embodiment, the cross rail of the shaft is removable. For example, the elastic band can be gripped at one end and pulled vertically from the depression. The cross-sectional area of the extended part shrinks and is thus released from the depression. The elastic band is again inserted into the recess in the extended state, and when loosened, the side rail of the shaft is made immovable again.

  Further details of preferred embodiments of the invention are disclosed in the drawings, the specification relating thereto, or the claims.

  Several embodiments are shown in the drawings.

  FIG. 1 shows a shaft 1 comprising a shape element 2 and a shaft crosspiece 3 carried thereby. The shape element 2 is, for example, an extruded aluminum shape (contour) having a box-shaped, hollow carrier part 4 at the top. A wall-like component 5 that carries the shaft crosspiece 3 extends from the carrier portion 4. The shaft crosspiece 3 is made of steel, for example, and functions to receive a ridge. FIG. 2 shows the eyelet 6 at the end of the collar 7 (not shown in its entirety). As can be seen, the eyelet 6 rests on the side rail 3 of the shaft with play.

  The shaft crosspiece 3 is made of steel. This is held releasably on the shape element 2. For this purpose, the shaft crosspiece 3 is provided with a fixing rib 9 projecting substantially perpendicularly from the flat and flat rear surface 8 of the shaft crosspiece 3. The fixing rib 9 can have various suitable forms. In this embodiment, the fixing rib 9 has a flat side surface 11 oriented perpendicular to the flat side 8, and the opposite side functions, for example, in conformity with the fixing rib 9. It has a side surface 12 provided with a stepped shoulder 13. The shoulder 13 faces the flat side 8. That is, the fixing rib 9 is slightly thinner in the vicinity of the flat side 8 than in the more remote part.

The fixing rib 9 projects into a recess 14 that extends along the entire length of the shape element 2. The indentation 14 is, for example, two walls that extend perpendicularly away from the wall 5 and whose front ends with flat strip-shaped abutment surfaces 17, 18 for the flat side 8 of the shaft cross 3. 15 and 16. The abutment surface may have a planar finish to accurately position the cross rail of the shaft. In order to tightly fasten the fixing rib 9 in the recess 14, a spring element 19 constituted by an elastic band 21, which is shown separately in FIG. 6, is provided. The elastic band 21 has, for example, a circular cross-sectional area, and thus forms an elongated cylindrical shape. The elastic band 21 can extend to a substantial extent. Its length roughly corresponds to the length of the shaft cross 3 in the relaxed state (shown on the right side of FIG. 6). This is a few centimeters longer than the shape element, so that the grippable end protrudes from the recess 14. The cross-sectional area of the elastic band 21 is larger than the free space between the side surface 11 and the wall 16 (FIG. 2). As the elastic band 21 stretches, its length increases, but its cross-sectional area decreases. The elastic band 21 has such a dimension that, when stretched, its cross-sectional area becomes smaller than the distance between the side surface 11 and the wall 16. The elastic band 21 has a high recovery capability. When the elastic band 21 is released, it basically contracts to a length corresponding to its original length, and its cross-sectional area also returns to its original size.

  The shaft rod 1 is attached as follows.

In order to fix the shaft crosspiece 3 to the shape element 2, the fixing rib 9 of the shaft crosspiece 3 is introduced into the recess 14. With this operation, the shoulder 13 engages behind the corresponding step, which is formed on the side surface 12 and is in this case rectangular. It may have a bevel shape on the surface of the step that provides a certain wedge-proofing effect. The wedge prevention effect can be exploited to press the flat side 8 against the abutment surfaces 17,18. The steps may be provided in the extruded profile and may remain rough or may be precision machined thereafter.

  As described above, after the shaft crosspiece 3 is attached to the shape element, the elastic band 21 extends, for example, as shown in FIG. Placed. Such an operation can be achieved, for example, by connecting its front end to a wire or other suitable pulling means and holding the other end firmly in the extended state. In this way, the elastic cord 21 can be pulled in the recess 14 in the longitudinal direction. The state shown in FIG. 5 is reached when the elastic cord 21 is pulled into the recess 14 such that both ends protrude approximately equally beyond the opening in the front surface of the recess 14. . The elastic band 21 is placed with play in the recess 14. Here, when the elastic band 21 is released, the elastic band 21 contracts in the longitudinal direction and spreads radially until reaching the state shown in FIG. 2, at which time the fixing rib 9 is firmly clamped to the wall 15. The step 13 fixes the shaft crosspiece 3 to the shape element 2 with the shape fixed.

In this state, the shaft crosspiece 3 is held firmly. The attachment of the fixing rib 9 between the wall 15 and the side surface 12 is permanently maintained by the elastic band 21. Therefore, the force acting on the horizontal rail 3 by the rod 7 cannot move the horizontal rail 3 with respect to the shape element 2. For example, vibration generated by applying an impact to the edge 6 of the end of the shaft on the horizontal rail 3 in the front-rear direction is braked by the elastic band 21.

  In the case of disassembly, a tensile force is applied to the rubber string 21. The portion of the string exposed for pulling extends radially and shrinks. As a result, this is disengaged from each seating surface of the fixing rib 9 and the wall 16. The extending region gradually progresses along the entire length of the elastic band 21 until the elastic band 21 is fully extended and can therefore be removed axially from the recess 14. In this way, the shaft crosspiece 3 is freed again, replaced or repaired and re-installed.

FIG. 3 shows a modified embodiment of the shaft 1. The first modification is the original shape of the shaft crosspiece 3. 2 is designed for the eye of the end of the C shape, but the shaft 3 of FIG. 3 has the eye 6 of the end of the J shape. It functions to receive. For this reason, the horizontal rail 3 of the shaft has a wide, groove-shaped depression 22 on the opposite side. For mounting, the principle shown in FIG. 2 can be used. However, the principle shown in FIG. 3 can also be used, in which case the fixing rib 9 is held in the recess 14 by two elastic cords 21, 23. Also in this embodiment, the walls 15, 16 are provided with slightly enlarged steps 24, 25. However, as in the embodiment of FIG. 2, it is not the inside of the wall 15 but the bottom 26 of the recess 14 that functions as an abutment surface for the fixing rib 9. In this embodiment, the bottom is subdivided into two strip-like regions that are arranged at an obtuse angle. However, the bottom can also be flat or stepped. The fixation rib 9 comprises an enlarged end having a surface oriented away from the fixation rib 9 and directed towards the bottom 26. The surface is also formed by two strip-like flat regions 27, 28 arranged at an obtuse angle with respect to each other. Regions 27 and 28 constitute a surface that coincides with the surface of bottom 26. The elastic bands 21, 23 press the fixing rib 9 against the bottom 26 and thus make the shaft crosspiece 3 on the shape element 2 immobile.

However, in order to press the flat side 8 of the shaft crosspiece 3 against the abutment surfaces 17, 18, a gap is left between the bottom 26 and the fixing rib 9, or more precisely its enlarged end. It is also possible. In a modified embodiment, the abutment surfaces 17, 18 can be provided with shape fixing means. Such a shape fixing means can be configured by arranging the contact surfaces 17, 18 at an obtuse angle. In this case, instead of the flat side 8, a corresponding matching surface area is then formed on the shaft cross 3.

Furthermore, in one or both abutment surfaces 17, 18 there are provided longitudinally extending steps or ribs on the flat side 8 of the shaft cross 3 that have a shape-fixing relationship with the matching structure. It is also possible. This serves to position the cross rail of the shaft.

  FIG. 4 shows a further embodiment of the shaft 1. The shape element 2 has a recess 14 that opens in a direction parallel to the wall 5, so that the wall 5 appropriately constitutes a wall that bounds the recess 14. The interior of the wall 5 is shaped by a groove 29 penetrating in the longitudinal direction. The wall 5 faces a wall 31 shaped to define a step 32 adjacent to the bottom 33 of the recess 14 thus formed. The wall 31 is bent inwardly in the vicinity of the groove-like opening of the recess 14 oriented downward.

  In this embodiment, the shaft crosspiece 3 is made of sheet metal (such as steel), for example. This has a hook-shaped portion 34 for receiving the hook. A straight part 35 provided with a bead 36 extends into the recess 14.

  The bead 36 is coupled to the stage 32. Between the step 32 and the bead 36, a rod-shaped or flat strip-shaped braking element 37 is positioned. Furthermore, a braking element 38 can be arranged between the wall 5 and the part 35, for example acting as a saddle brake. The elastic band 21 works so as to prevent the horizontal rail 3 of the shaft from moving in the manner described above. Accordingly, the elastic band 21 on the one hand presses the bead 36 against the braking element 37 in order to fasten it to the step 32 and, on the other hand, the component 35 of the shaft crosspiece 3 on the plate-like extension 39 of the braking element 38. Press on. A fixing rib 41 protruding into the groove 29 can be formed on the plate-like extension part 39. The extension 39 carries the head of the braking element 38 with a substantially trapezoidal cross section. The head forms a buffer for the eyelids at the end of the eyelid, and has an impact surface 42 that is oriented towards the eyelet at the end of the eyelid and against which the eyelid can abut. The braking element 38 is made, for example, from a synthetic material that dampens.

  The same applies to the braking element 37.

FIG. 8 shows a further embodiment of the shaft 1 according to the invention. In this embodiment, the shaft crosspiece 3 has a lower cornered (bent) end 43. This end 43 provides the rubber strap 21 with an abutment surface 44 having two strip-shaped pedestal regions oriented substantially perpendicular to each other. The outward facing wall 16 is bent towards the elastic band in order to make the mouth of the recess 14 narrower. In contrast, the wall 15 is basically straight and extends from the wall 5 substantially vertically.

  As described above, the elastic band 21 is inserted into the recess 14 in an extended state and then released, so that its cross-sectional area increases again and the end 43 is pressed against the walls 5, 15. The elastic band 21 engages the bent end of the wall 16.

  In this embodiment, similar to the embodiment of FIG. 4, the elastic band 21 is not covered by the shaft crosspiece or is not completely covered. For this reason, it may also be pressed radially into the recess 14 through an uncovered slot-like opening. For this purpose, it is placed, for example, in a slot-like opening and first lies between the location 45 of the shaft crosspiece and the end 46 of the wall 16. The elastic band 21 can then be compressed by one or more rollers and pressed into the recess 14. The roller can travel along the length of the elastic band 21 and press it into the recess 14 little by little.

  In an alternative form, it is conceivable to suitably deform the shape element 2. FIG. 7 thus shows the initial, undeformed shape element 2, both walls 15, 16 being straight and oriented substantially perpendicular to the wall 5. When the elastic band 21 is initially placed in the depression 14 that has not yet been provided with a relief groove, the elastic band is not biased in either way and lies loosely in the depression 14. Here, when the wall 16 bends inward, i.e., deforms, for example, by passing a pressure roller over and along the wall 16, the wall 16 assumes the shape shown in FIG. Change. In this way, the desired clamping of the shaft crosspiece 3 is again obtained.

  According to the invention, the shaft 1 comprises a shape element 2 and a shaft crosspiece 3 fixed to the shape member 2 by means of a rubber string 21 or a suitable spring element. An easy-to-manufacture, reliable and economical device is obtained, and the shaft cross 3 is supported in a damped state.

It is a fragmentary perspective view which shows a shaft rod. FIG. 2 is a partial cross-sectional view of the shaft bar of FIG. 1 with the ridge partially shown in side view. It is a cross-sectional view showing a modified embodiment of the shaft rod together with the flange. FIG. 6 shows a further embodiment of the shaft bar shown with a braked shaft crosspiece support. FIG. 3 is a diagram showing a crosspiece of the shaft of FIG. 2 when a spring element is inserted. It is a figure which shows the elastic band which functions as a spring element in the extended and loose state. FIG. 6 shows an alternative embodiment of a shaft bar having a deformable recess, showing the state before the shaft crosspieces can move. FIG. 8 shows the shaft rod of FIG. 7 in a fully attached state.

Explanation of symbols

1 shaft rod 2 shaped element 3 axes of the rungs 4 carrier portions 5 parts 6 end of eyelets 7 heald 8 flat side 9 fixing ribs 11, 12 side 13 shoulder 14 recess 15, 16 walls 17 and 18 those Contact surface 19 Spring element 21, 23 Rubber string 22 Dimple 24, 25 Step 26 Bottom 27, 28 Region 29 Groove 31 Wall 32 Step 33 Bottom 34, 35 Part 36 Bead 37, 38 Braking element 39 Extension part 41 Fixing rib 42 Impact Surface 43 End 44 Contact surface 45 Location 46 End

Claims (6)

A shaft rod (1) for a loom frame of a loom,
A shape element (2) having an elongated depression (14);
A shaft crosspiece (3) with a fixed rib (9) extending into the recess (14) in the installed state;
An elongated spring element (19),
The recess (14) has a slot-shaped opening , the slot-shaped opening being narrower than the recess (14),
The recess (14) has a seating surface for the fixing rib (9), the seating surface comprising a step (24),
The fixing rib (9) comprises a shoulder (13),
The seat surface and the fixing rib (9) have a shape complementary to each other of the shape of the step (24) and the shoulder (13) , and are in close contact with each other,
The spring element (19) is an elastic band, which is arranged in an extended state in the recess (14) and then released, contracts in the longitudinal direction, expands in the lateral direction and expands in the shoulder (13 ) Against the step (24), so that the fixing rib (9) is tightened tightly,
The rubber cord (19) is a shaft bar characterized in that it is elastic in the longitudinal direction, is made of an elastomer, and its cross-sectional area decreases when it is stretched . 2. A shaft according to claim 1, characterized in that the spring element (19) is arranged in the recess (14) and is glued to the shape element .   2. A shaft rod according to claim 1, wherein the shape element (2) is an extruded shape material. Between the seating surface and the fixing rib, a braking element (37) for at least one axial crosspiece or a saddle braking element (38) carried by at least one axial crosspiece is arranged. The shaft bar according to claim 1 or 2, wherein   3. Axle bar according to claim 1 or 2, characterized in that the spring element (19) has a circular cross section when in a relaxed state.   3. A method for attaching a shaft according to claim 1 or 2, wherein the spring element (19) is first introduced into the recess (14) with the fixing rib (9) extending afterwards, and then the spring. A method characterized in that the element (19) is released and thus contracts in the longitudinal direction, spreads in the lateral direction and tightens the fixing rib (9) tightly.

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