JP2010159531A - Heald shaft with robust corner connection - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heald shaft with a simple and reliable connection of the heald shaft and the lateral support. <P>SOLUTION: The heald shaft comprises at least one connection device 6 between a shaft rod 3 having, on its end, a hollow chamber 14 that is open on the front, and a lateral support 4 having an extension 17 extending into the hollow chamber 14, whereby the connecting device comprises a tensioning device 134 that is to be inserted in a passage 31 traversing the hollow chamber 14 of the shaft rod 3, and that is disposed for tensioning the extension against the strips 12 and 13 of the hollow chamber 14. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heald frame used in looms, particularly looms operating at low speed, such as looms operating with fluids, such as water looms.

  In textile manufacturing, heald frames are used for lacing, each of the heald frames having a number of healds with small holes that move the warp threads. The heddle frame is configured as a rectangular frame, also called a “held frame”. This type of heald frame is known from US Pat. It consists of two shaft rods arranged horizontally during use and two vertical side supports for connecting the shaft rods to each other. In order to connect the side support and the shaft rod, the side support has an extension that extends into the hollow space of the shaft rod. The extension can be secured to the shaft rod by a hollow rivet extending continuously in the lateral direction.

  Patent document 2 discloses a heald frame, in which a side support has an extended portion having a continuous opening facing sideways. This opening is provided to fix and attach an adapter provided in the extension. At least one pin of the adapter extends through the opening and a vibration damping member is provided between the pin and the edge of the opening. To connect the shaft rod to the side support, the extension of the side support is fixed by diagonally arranged clamping bolts that extend through the narrow side of the top of the shaft rod, the extension being The adapter is inserted into the hollow space of the shaft / rod.

  Further, Patent Document 3 discloses a heald frame in which a side support is screwed to a shaft / rod, and for this purpose, the end of the shaft / rod is sandwiched. The heddle frame has a wall surface provided with a fixed opening for connecting a side support between an upper band configured as a hollow body and a lower band configured as a hollow body. To secure the side support, the adapter part slides over a flat wall region having an opening that coincides with the fixing opening of the shaft rod. The sleeve is fitted into the overlapping opening. The two ends of the side support are slid over the adapter until their openings overlap the fixing holes in the heald frame, on which the countersunk bolts and countersunk nuts are inserted and tightened.

  In simple looms it is important that a rigid and cost-effective heald frame is used. To that end, the possibility of disassembling the heald frame may be a secondary problem.

Swiss Patent No. 643 310 European Patent No. 0 466 700 JP 2001-64843 A

  It is an object of the present invention to provide a heald frame having a connection with a side support that is simple and reliable.

  This object is achieved by the heald frame of claim 1.

  The heddle frame has a connecting device between the shaft rod and the side support of the heald frame at least at one of its corners, the side support having a particularly simple and robust design. The connecting device is in the form of a clamping device, preferably an expansion sleeve, through the hollow chamber of the shaft rod and two openings provided on the flat side of the shaft rod defining the hollow chamber. It consists of something that extends in the transverse direction.

  The clamping device consists of one or more parts. In the simplest case, the device is a wedge-shaped or similar conical member that fits into a passage extending transversely through the shaft rod. In that case, the passage is configured between the extension of the side support and the clamping piece, and the extension extends into the hollow chamber. Preferably, the clamping piece and the extension are separated from each other by fitting a conical member or by expanding the member radially. As a result, the entire device is fixed in place in the hollow chamber.

  Preferably, the hollow chamber has a rectangular cross section with two opposing short edges and two long edges, so that the connecting device—in response to tightening of the tightening device—between the short edges of the cross section Generate tension acting on the. The tightening of the tightening device is achieved by fitting the tightening member into an expansion member (two-part tightening device) provided in the passage or by fitting the member into the passage (partly composed tightening device). .

  The clamping device consists of two parts, for example, a sleeve and another expansion member. The inflating member is provided to expand the inflating device. The expansion member is fitted into the opening of the expandable body. In the simplest case, the expansion member is a cylinder with extra dimensions. Then, the column is inserted into an expandable main body (for example, an expansion sleeve) with an appropriate pressure to expand the main body. The body may be round or have a corner. In order to satisfy the functions of expansion and clamping, it is sufficient if the body is expanded in the vertical direction, i.e. in the length direction of the side supports.

  Preferably, the inflatable body is a plastic sleeve. Preferably the sleeve has a cylindrical outer surface and a cylindrical passage opening. On one or both sides, the passage opening may be provided with an extension such as a funnel to facilitate insertion of the expansion member. In addition, preferably the cylindrical expansion member may be provided with a more or less distinct bevel or conical portion on one or both sides to facilitate insertion into the inflatable body.

  The expansion device configured as a sleeve may be annular and closed or may have a slit. For example, it may have one or more slits that extend only over a portion of the length of the sleeve axis.

  Preferably, the clamping piece described above is part of a spacer which can be fixed to a side support or extension, preferably a side support made of metal, for example steel, directly with a shaft rod made of, for example, aluminum. Ensure that there is no contact. As a result, the spacer acts as an electrical insulator that separates the different metals of the side support and shaft rod from each other, thus preventing contact corrosion due to different electronegativity of the associated metal. This is particularly advantageous for looms that drive wefts with water (so-called hydroweaving machines) or for other looms that operate in wet environments.

  Preferably, the spacer is of a one-piece or multi-piece plastic body with an open or closed pocket at its end to accommodate an extension of the side support. In addition, the passage extends in the transverse direction of the plastic body. Preferably, half of this passage is bounded by an arcuate recess in the extension and the other half by a recess delimited by the arcuate shape of the clamping piece, said clamping piece being part or part of the spacer Composed.

  The spacer may be an injection molded plastic part. Preferably, the part consists of a plastic material which is at least slightly elastic and not very hard. The elasticity particularly affects the choice of whether to extend the spacer slightly in a direction that coincides with the length direction of the side support in order to fix the spacer in place in the hollow space of the shaft and rod. Since the flat side portion has a recess, the stretchability of the spacer can be increased.

  Preferably, the spacer is held on the side support. For this purpose, the spacer may be provided with one or more connecting means, for example, a detent for preventing detent, a detent for protrusion. The corner connection of the present invention is a corner connection that is extremely robust, simple, cost effective and non-corrosive. It is stable and allows low to medium speeds, for example 300-600 revolutions per minute.

  Preferably, the heald carrier rail is removably suspended from the shaft rod. During the warp exchange, the hanger (also called lidar) is removed and the heald carrier rail is removed together with the heald. The heddle frame remains in the device. Since the heald frame remains on the loom except during repair, and since they are not removed during warp exchange, the side supports and shaft rods are configured with open bolts that are pushed into the expansion sleeve. It can be connected by a non-removable pressure fitting connection. However, it is instead provided with a removable expansion member, e.g. a conical screw or a non-circular or eccentric expansion member, in combination with a round or cornered integral or multi-part expansion sleeve Is also possible.

  Further details of advantageous embodiments of the invention will be apparent from the description, the drawings or the claims. The description is limited to the essential features of the invention and various circumstances. The drawings disclose further details, but are to be referenced as supplements. They are as follows:

The schematic front view of the heald frame of the present invention. The schematic explanatory drawing of the detail of the heald frame of FIG. FIG. 3 is a cross-sectional view of the corner connection device of the heald frame of FIG. 2. FIG. 3 is an exploded perspective view of a lower left corner of the heald frame of FIG. 1 or FIG. 2. The simplified whole layout figure of the left side support body lower end of the heald frame of FIG. FIG. 6 is a cross-sectional view in a horizontal section of a corner connection portion of the side support in FIG. 5. FIG. 8 is a schematic front view of a spacer for corner connection along line II-II in FIG. 7. FIG. 8 is a cross-sectional view of the spacer of FIG. 7 taken along line II-II of FIG. The schematic explanatory drawing of the left end of the lower heald rod of the heald frame of FIG. FIG. 10 is a cross-sectional view of the heald frame of FIG. 9 along line II. The longitudinal cross-sectional view of the side support body which has the spacer of the hollow space of a shaft rod. The front view of an expansion sleeve. The longitudinal cross-sectional view of the expansion sleeve of FIG. FIG. 4 is an illustration of a shaft-rod hollow space expansion sleeve with a side support with an adapter and an unexpanded expansion sleeve. The front view of an opening bolt. The side view of the opening bolt of FIG. FIG. 17 is a longitudinal sectional view of a fixed corner connection having the members of FIGS. FIG. 18 is a cross-sectional view of the corner connection of FIG. 17 along line III-III. FIG. 13 is an illustration of the expansion sleeve of FIG. 12. FIG. 17 is a view of the opening bolt of FIG. 16. FIG. 20 is a longitudinal cross-sectional view of the expansion sleeve according to FIG. 19 including the force generated by the open bolt. FIG. 6 is a front view of a modified expansion sleeve having an expansion cone. FIG. 23 is a longitudinal sectional view of the radially expandable device of FIG. The front view of the fastening device which has an elliptical cam. FIG. 25 is a longitudinal sectional view of the tightening device of FIG. 24. The longitudinal cross-sectional view of the corner connection of FIG. FIG. 18 is a longitudinal sectional view of the corner connection of FIG. 17. The figure of another Example of the fastening apparatus before tightening. FIG. 29 is a longitudinal sectional view of the tightening device of FIG. 28 while applying a tightening force. FIG. 29 is a longitudinal sectional view of the tightening device of FIG. 28 in a tightened state.

  FIG. 1 shows a heald frame 1 comprising an upper shaft rod 2, a lower shaft rod 3 and two side supports 4, 5. Vertically arranged side supports 4, 5 connect the shaft rods 2, 3 to each other. The connection parts 6, 7, 8 and 9 are provided at the corners of the rectangular heald frame 1. For the following description of the connecting device, the lower left connecting portion 6 is cited. The remaining connection parts 7, 8, 9 are similarly configured.

  FIG. 2 shows the connection site 6 between the shaft rod 3 and the side support 4. The side support 4 is preferably a folded sheet metal member. It has an open U-shaped cross section facing the shaft rod 3. It consists of, for example, a stainless steel plate or other suitable material. Preferably, the shaft rod 3 consists of an aluminum extrusion. Its cross section is shown in FIG. It has two flat, flat side walls 10, 11, each connected to each other by strips 12, 13-top and bottom. The side wall surrounds a hollow space 14 which is basically rectangular in cross section, which opens to the front end of the shaft rod 3 facing the side support 4.

  Above the strip 13 there is also a smaller groove 15 extending through the shaft rod 3 for securing the heald carrier rail by the lidar.

  As shown in FIGS. 2 and 5, the corner connection 6 also includes a connection piece 16 extending as an extension 17 that is spaced from the side support 4 to the hollow space 14. For example, the connecting piece 16 is configured as a planar body having the shape of a parallelepiped extending between the two legs of the U-shaped profile of the side support 4 and is connected thereto by suitable means, for example by means of flanges 48,49. And a larger portion of the connecting piece 16 is held to extend away from the side support 4. As shown in FIGS. 4 and 5, the connecting piece 16 has a straight narrow side or edge 18, and a second narrow side or edge 19 is provided parallel thereto. Edge 18 is continuous while edge 19 is delimited by a recess 20 having a semicircular edge 21. As shown in FIG. 6, the connection piece 16 is narrower than the side support 4.

  The cross section of the connecting piece 16 is substantially smaller than the cross section of the hollow space 14 shown in FIG. The adapter 22 is used for adaptation, and the adapter acts as a spacer 23, as can be seen in particular from FIGS. The spacer 23 is a plastic body having an outer shape that can be inserted into the hollow space 14 with minimal play. In order to be fitted to the connecting piece 16 or the extension 17, the hollow space has a pocket 24 with a basically rectangular cross section, the cross section of the pocket approximately corresponding to the cross section of the connecting piece 16. Preferably larger by a slight tolerance.

  The spacer 23 is preferably symmetrical with respect to the vertical plane E and is integrally formed. However, the spacer is divided along a vertical central plane E and may therefore consist of two halves.

  The adapter has a narrow strip 25 on its narrow side. Below that, a relatively large pressing piece 26 constitutes the end of the spacer 23. The strip 25 and the pressing piece 26 are connected to each other by side walls 29, 30 which are flat, parallel, preferably slightly elastic, between which a pocket 24 is delimited.

  The pressing piece 26 adjacent to the pocket 24 is provided with a recess 28 delimited by an arcuate edge 27, which also extends to the side walls 29, 30 and forms two round holes therein. To do. The recess 28 thus delimits a half of the passage 31 extending across the spacer 23 and its pocket 24. The pocket 24 may be open at the end, that is, at both ends of the spacer 23.

  On the side facing the side support 4, the spacer 23 may be provided with detent protrusions 32 and 33 provided to hold the adapter 22 on the connection piece 16. As shown in FIG. 2, the detent protrusions 32, 33 extend to the back of the connection piece 16, and thus fix the spacer 23 or the adapter 22 on the side support 4.

  The connecting device constituting the corner connection 6 preferably further comprises a clamping device 134, for example comprising an inflating device in the form of an inflating sleeve 34, which are respectively in FIG. 4 as in FIGS. 12, 13 and 19. Indicated. The expansion sleeve 34 is fitted into the side walls 10, 11 through holes 35, 36 that are centered with each other—in the assembled state—with cores 31. The expansion sleeve 34 has an axial length that at least reaches the thickness measured between the outer flat sides of the side walls 10, 11 of the shaft rod 3, but preferably from FIGS. As is apparent, it has a length slightly exceeding the length. Preferably, the expansion sleeve 34 is made of a plastic material that is slightly elastic and stretchable. Preferably it has the shape of a closed ring. Alternatively, it may have a complete slit on at least one position on its circumference, or it may be partly cut in the longitudinal direction of the shaft, but in that case it consists of a plastic material that does not stretch very much. Preferably, the inflatable sleeve includes a cylindrical opening 37 provided for receiving an inflatable member 38, for example in the form of a bolt or cylinder 39 of metal or other material.

  The dimensional relationship of the members of the corner connection 6 is particularly apparent from FIGS. FIG. 11 shows the side support 4 provided with a connection piece 16 together with an adapter 22 or a spacer 23 inserted into the hollow space 14 of the shaft / rod 3. Here, the passage 31 is aligned with the holes 35 and 36. The spacer 23 has some vertical play V. This results from the difference between the vertical distance Y of the strips 12, 13 and the vertical height X of the spacers 23. The diameter B of the passage 31 matches the diameter of the holes 35 and 36. As shown in FIG. 12, the outer diameter Da of the expansion sleeve 34 is smaller than the diameter B. In turn, the inner diameter Di is smaller than the outer diameter A of the preferred cylindrical expansion member 38 (FIGS. 15 and 16). As shown in FIG. 14, a clearance S exists between the expansion sleeve 34 and the passage 31 or the holes 35 and 36, and the clearance is half of the difference between the diameter B and the diameter Da. The difference in diameter between the diameter of the expansion member 38 and the inner diameter Di of the expansion sleeve 34 minus A minus Di is preferably greater than the vertical play V.

  The corner connection 6 is assembled as follows.

  Initially, a spacer 23, shown separately in FIGS. 7 and 8, is fitted over the extension 17 or connecting piece 16 of FIG. Then, the side support 4 provided with the spacer 23 is inserted into the hollow space 14 of the shaft / rod 3 as shown in FIGS. 9 and 10. In this way, the configuration of FIG. 11 is obtained. Then, the expansion sleeve 34 is inserted into the passage 31 as shown in FIG. In order to seal the clearance S and remove the vertical play V, the expansion member 38 is inserted into the opening 37, and the state shown in FIGS. Due to the strong radial expansion of the expansion sleeve 34, the pressing piece 26 is repositioned away from the connection piece 16. As a result, the vertical height of the adapter 22 is greatly increased, and the strip plate 25 and the pressing piece 26 move away from each other.

  Due to the vertical extension of the adapter 22, there is no vertical play V and the adapter 22 is fixed in place in the hollow space 14. Due to the extension, ie the extension of the adapter 22, a vertical clamping force is generated between the strips 12 and 13. In this state, the corner connection 6 is firm. There is a firm bond between the side support 4 and the shaft rod 3. The same applies to the other corner connections 7, 8, and 9.

  19 to 21 show the expansion action of the expansion sleeve 34 by the operation of the tightening device 134, that is, the expansion member 38. When the expansion member 38 is inserted into the relatively narrow opening 37, a force distribution having a radially outward direction occurs. This movement is facilitated if the cylindrical expansion member 38 has at least one suitable bevel 40.

  FIG. 23 shows another clamping device 134. As shown, the expansion sleeve 34 has a double conical passage and includes parts 41, 42 that are suitably conically shaped. The molded part 41 has a threaded hole, and the molded part 42 has a pocket for receiving a bolt tip 43. By tightening the bolts, both molded parts 41, 42 are pulled simultaneously, thus expanding the expansion sleeve 34 radially.

  In another tightening device 134, the expansion sleeve 34 may be configured as shown in FIGS. In this case, the inflatable sleeve 34 is not circular, for example, it has square and rounded corners. Correspondingly, the passage 31 and the holes 35, 36 are also not circular but have the shape of their openings. The passage 31 of the expansion sleeve 34 is not circular, i.e., for example, elliptical. Similarly, there is an oval shaped part that acts as an expansion member 38. If it is rotated by a suitable tool, the expansion member 34 expands at least in the vertical direction, thus performing the function as a clamping device as described above.

  The corner connection 6 of the heddle frame 1 provides a mechanically stable and electrically isolated connection between the side support 4 and the shaft rod 3 made of any metal or other material. An adapter 22 attached to the connecting piece 16 of the side support 4 and simultaneously inserted into the hollow space 14 of the shaft rod 3 by means of the connecting piece is provided for connection.

  FIGS. 26 and 27 again show the connection device of FIGS. 14 and 17 as a cross-section. As can be seen, the inflatable sleeve 34 exhibits some elasticity. It is enlarged radially by the expansion member 38, but in particular the cross section located between the side walls 10, 11 is enlarged in the radial direction so that the connecting piece 16 and the pressing piece 26 for the strips 12, 13 are separated from each other. Apply vertical tension in the direction of travel.

  28 to 30 show a modified and particularly simple embodiment. In this case, the clamping device 134 has a body 50, for example conical, which tapers in one direction. The two end faces 51, 52 have different sizes. The body 50 may have a circular cross section, a rectangular cross section, or any other cross section. Therefore, the main body 50 represents a cone or a prism. Preferably it consists of at least a minimally elastic material, for example a plastic material. It may be composed of one part or a plurality of parts and made of the same material. Alternatively it may consist of several materials. For example, it may be a metal core with a plastic jacket.

  In the present embodiment, as shown in FIG. 28, the passage 31 has a conical shape. In the central plane M, the diameter D of the conical passage 31 matches the diameter and size of the end face 41.

  When the main body 50 is inserted into the passage 31, the main body 50 moves to separate the connection piece 16 and the pressing piece 26 as shown in FIG. By elastically deforming the main body 50, the main body is pressed sufficiently deeply into the passage 31 as shown in FIG. 30, so that both end faces 51, 51 are slightly from the corresponding side walls 10, 11. Stick out. In this manner, the main body 50 applies tension to the pressing piece 26 and the connecting piece 16 so as to be separated from each other, and presses them against the strips 12 and 13.

  This embodiment of the clamping device 134 is characterized by being particularly simple.

  The passage 31 extends in a direction transverse to the dividing line between the shaft rod 3, the connecting piece 16 and the pressing piece 26 of the adapter 22, where the clamping device is inserted into the passage. The tightening device includes, for example, an expansion sleeve 34 and an expansion member 38 that can be press-fitted into the expansion sleeve 34. As a result, the expansion sleeve expands. Expansion causes a vertical pulling force on the adapter 22 and thus tightens the corner connection 6.

1 Held frame 2, 3 Shaft rod 4, 5 Side support 6, 7, 8, 9 Corner connection, connection device 10, 11 Side wall 12, 13 Strip 14 Hollow part 15 Groove 16 Connection piece 17 Extension 18, 19 Edge 20 Recess 21 Edge 22 Adapter 23 Spacer 24 Pocket E Upright projection surface 25 Strip 26 Pressing piece 27 Edge 28 Recess 29, 30 Side wall 31 Passage 32, 33 Anti-slip 34 Inflator / expansion sleeve 35, 36 Hole 37 Opening 38 Expansion member 39 Cylinder V Vertical play Y Vertical internal dimension X of hollow space 14 Vertical height B of adapter 22 Diameter Da of passage 31 External diameter Di of expansion sleeve 34 Internal diameter A of expansion sleeve 34 External diameter of cylinder 39 S Play 40 Bevel 41, 42 Molded piece 42 Head 43 Bolt 48, 49 鋲 50 Main body 51, 52 Both end face D Diameter M Center plane 134 Tight Equipment

Claims (15)

At least one located between a shaft rod (3) having a hollow chamber (14) open to the front at the end and a side support (14) having an extension (17) extending into the hollow chamber (14). Connection device (6)
The connecting device is inserted into a passage (31) traversing the hollow chamber (14) of the shaft rod (3) and extended to oppose the strips (12, 13) of the hollow chamber (14). A heald frame (1) comprising a tightening device (134) provided to tension the part. The clamping device (134) is an expansion member that is fitted into the opening (37) of the expansion device (34) to secure the expansion device (34) and the side support (4) on the shaft rod (3). The heald frame of claim 1, comprising: (38). The tightening device (134) comprises a body (50) which is tapered at one end and fitted into the passage (31) at right angles to the shaft rod (3). The heald frame according to 1. Held frame according to claim 1, characterized in that the side support (4) and the extension (17) are made of metal and / or the shaft rod (3) is made of metal. The heald frame according to claim 1, characterized in that an electrical insulator (23) is provided between the side support (4) and the shaft rod (3). The heald frame according to claim 1, characterized in that a spacer (23) is provided on the extension (17). 7. Held frame according to claim 5 and 6, characterized in that the spacer (23) defines a certain distance between all edges of its cross section and the extension (17). The spacer (23) is a plastic body comprising one or more parts, the body having the passage (31) for accommodating the expansion device (34). The described heald frame. The passage (31) of the expansion device (34) is centered with a hole (35, 36) in a side wall (10, 11) of the shaft rod (3). The heald frame according to claim 8. The spacer (23) has a pocket (24) having a shape suitable for the shape of the extension (17) for receiving the extension, and the passage (31) is at the end of the pocket (24). The heald frame according to claim 8, which intersects with the pocket. The spacer (23) can expand at least slightly in a direction parallel to the side support (4), so that the spacer (23) is located on at least one of the narrow sides of the pocket (24), 9. Held frame according to claim 8, characterized in that it has a rigid part (26) that can be repositioned away from the extension (17) by means of the expansion device (34). The heald frame according to claim 1, characterized in that the extension (17) has a recess (21) delimiting a part of the passage (31) in one of its narrow sides. 12. A heald frame according to claim 11, wherein the pressing piece (26) has a recess (28) separating a part of the passage (31). The heald frame according to claim 5 and 6, characterized in that the spacer (23) is connected to the side support (4). The expansion member (38) is a metal cylinder (39), and the cylinder has an outer diameter (A) that exceeds an inner diameter (Di) of the expansion device (34) configured as an expansion sleeve. The heald frame according to claim 1.

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