Clamp for a rapier loom
By using 3D-printed lightweight metal clamps, combined with an integrated design and movable clamping elements, the problem of heavy and insufficiently rigid clamps for rapier looms has been solved, achieving lightweight and efficient clamping of weft yarns.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- PICANOL NV
- Filing Date
- 2022-05-31
- Publication Date
- 2026-04-21
AI Technical Summary
The existing clamps of rapier looms are heavy and not rigid enough, making it difficult to meet the requirements of lightweight and efficient weft clamping.
The fixture is manufactured using 3D printing technology, utilizing lightweight metals such as titanium and an integrated design. It combines movable clamping elements, spring elements, and opening elements, and connects the upper and lower parts through a web plate, reducing or eliminating the use of screws and optimizing the fixture structure to improve rigidity and lightness.
This design achieves lightweighting and increased rigidity of the clamps, reduces the use of screws, lowers manufacturing complexity and wear risk, and improves weft yarn clamping efficiency.
Smart Images
Figure CN117480290B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a clamp for a rapier loom, also known as a clamped loom. More specifically, the invention relates to a clamp having hooks and clamping elements, wherein the weft yarn can be clamped between the hooks and the clamping elements. Furthermore, the invention relates to a clamp assembly comprising a clamp and a rapier for carrying the clamp, the rapier being particularly a clamping belt. Additionally, the invention relates to a loom and a method for manufacturing the clamp. Background Technology
[0002] As is well known, clamp looms typically include two clamps for feeding the weft yarn through the weft opening. These clamps are, for example, referred to as a traction clamp and a receiving clamp. The traction clamp is designed to guide the weft yarn through the first half of the weft opening, and the receiving clamp is designed to guide the weft yarn through the second half of the weft opening after it has been removed from the traction clamp. Typically, the clamp equipped with hooks is used as the receiving clamp.
[0003] For example, a receiving clamp is shown in WO 2009 / 135636 A1, which further includes an opening element and a spring element, referred to as a drive lever in WO 2009 / 135636 A1. With the aid of the opening element, the clamping element can reciprocate substantially in the longitudinal direction of the clamp relative to the clamp housing. The spring element forces the clamping element toward the hook, thereby pressing the clamping face of the hook and the clamping face of the clamping element against each other to allow the weft yarn to be clamped between the clamping faces.
[0004] US 4739805 also shows a receiving clamp in which a cover, formed separately from the clamp body, is screwed onto the clamp body by two screws. Summary of the Invention
[0005] The object of the present invention is to provide a lightweight and rigid clamp and a method for manufacturing such a clamp.
[0006] According to a first aspect, a clamp for a rapier loom, particularly a receiving clamp, is provided, wherein the clamp includes a clamp body and a clamping device for clamping weft yarn, wherein the clamp body includes a base, a first side portion adjacent to the base, a second side portion adjacent to the base opposite to the first side portion, and a hook disposed at a distal end of the clamp body, wherein the clamping device includes a movable clamping element, a spring element, and an opening element, wherein the movable clamping element is movably mounted within the clamp body, and wherein the spring element is configured... For pushing a movable clamping element toward a hook, for clamping a weft yarn between the movable clamping element and the hook, and the opening element is configured to allow the movable clamping element to move away from the hook against the restoring force of a spring element, wherein the clamping body includes an upper portion opposite to a base, wherein the upper portion is adjacent to a first side portion and connected to at least one of a second side portion and a base portion via a web, wherein the first side portion, the second side portion, the upper portion and the web portion are integrally formed with the base portion, and wherein the opening element is mounted between the upper portion and the base portion.
[0007] In the context of this application, a web is defined as a sheet-like, plate-like, or strip-like element that connects the upper portion to at least one of the second side portion and the base. Connecting the upper portion to the base and / or the second side portion via a web, especially via at least two webs, allows for a sufficiently rigid arrangement of the upper portion, wherein the number of screws or other connecting elements used to fasten the upper portion to the base can be minimized or even avoided.
[0008] In the context of this application, the terms "first" and "second" should not be interpreted as limiting a series or number of terms, but are used only to distinguish or identify individual members within a group. "A" and "one" are used as indefinite articles and should not be interpreted as "exactly one". In particular, in embodiments of the clamp, the clamp body has more than one web, the upper portion of which is connected to the base and / or a second side portion via said web.
[0009] The opening element is installed between the base and the upper part; in other words, the opening element and / or the support unit supporting the opening element in the clamping body are clamped between the base and the upper part.
[0010] Using 3D printing technology, the base, two sides, and top can be formed as a single unit.
[0011] In one embodiment, the fixture is designed to be manufactured by 3D printing. In another embodiment, for this purpose, large flat surfaces are avoided at the top, first side, and / or second side, and these portions are configured to have openings or perforations.
[0012] In the context of this application, a hook is defined as a structure having a curved free end section for forming two opposing flanks, referred to as a first flank and a second flank. In one embodiment, the first flank, located at the free end section, extends obliquely to the longitudinal direction of the clamping body, while the second flank extends at least substantially parallel to the longitudinal direction of the clamping body. In one embodiment, the hook is formed separately and mounted on other parts of the clamping body. In other embodiments, the hook is also integrally formed with other parts of the clamping body, for example, by using 3D printing technology. In one embodiment, a movable clamping element contacts the first flank for clamping the weft yarn between the clamping element and the hook. In other embodiments, a fixed clamping element is provided at least at the first flank, wherein the movable clamping element interacts with the first flank for clamping the weft yarn between the clamping element and the hook. In one embodiment, the fixed clamping element is made of abrasion-resistant material. In one embodiment, the fixed clamping element is bonded to the interior of the hook. In particular, clamps with hooks are suitable for use as receiving clamps.
[0013] In one embodiment, the web connecting the upper portion to the base and / or to the second side extends below the horizontal level of the top flanges of the first and second sides. In other words, the fabric does not protrude beyond the top flanges of the sides, so that the web connecting the upper portion to the second side and / or to the base does not come into contact with the warp threads, thus preventing the warp threads from being caught or otherwise damaged due to openings or perforations in and / or between the multiple webs in the form of strip-shaped elements.
[0014] The clamping body is made of a lightweight material suitable for 3D printing. In one embodiment, the clamping body is made of titanium. Using titanium to manufacture the clamping body is advantageous because titanium has a high strength-to-weight ratio, thus enabling the formation of thin structures with sufficient strength. Preferably, the clamping body is formed using 3D printing.
[0015] In one embodiment, the opening element is mounted between the upper portion and the base, such that the surface of the opening element contacts the inner surface of the base and / or the upper portion. In other embodiments, a first bearing housing and a second bearing housing are disposed at opposing surfaces of the base and the upper portion, wherein a support unit for supporting the opening element is clamped between the first bearing housing and the second bearing housing. If a support unit is provided that is clamped and thus held in place, high-quality surface treatment or machining of the opposing surfaces of the fixture body is not required. Furthermore, since the opening element does not contact the opposing surfaces, the opposing surfaces of the fixture body do not need to be configured with a wear-resistant layer. In one embodiment, the support surface is manufactured in 3D printing, wherein a sufficiently smooth (i.e., without perforations and / or undulations) and flat surface can be provided without additional processing steps, such as milling or polishing of the support surface. This provides the advantage that the upper portion and the base of the fixture body do not need to be machined. In an alternative, the bearing surface can be processed, for example, by milling or polishing.
[0016] In one embodiment, one of the first and second bearing housings is configured to have a through hole, and the other is configured to have aligned threaded holes, with a screw extending through both the through hole and the aligned threaded holes for clamping the support unit. Since the upper portion is integrally formed with the other parts of the clamping body, the support unit can be clamped between the upper portion and the base with only one screw. Furthermore, the support unit clamped between the upper portion and the base helps to reinforce the clamping body. The threaded hole in this embodiment can be formed by 3D printing without requiring additional threading. In other embodiments, the threaded hole is formed in an additional manufacturing step.
[0017] In one embodiment, the opening element is a slider, and the support unit is configured to slide the slider onto the clamping body. In other embodiments, the support unit is a bushing, and the opening element is a lever rotatably mounted on the support unit via a bearing element. This embodiment is advantageous not only in the manufacture of the opening element but also in its operation.
[0018] In one embodiment, at each axial end of the support unit, the support unit is configured to have a collar, wherein the collar restricts axial movement of the opening element relative to the support unit. Because the collar restricts the axial movement of the opening element, contact between the opening element and the upper and lower parts can be avoided. The bushing and support unit are advantageously designed for use alone as well as in combination with clamps according to this application and other clamps, such as the clamp with a cover screwed onto the clamp body shown in US 4739805 and / or the clamp with a U-shaped clamp body shown in WO 2009 / 135636 A1.
[0019] In one embodiment, the bushing is a two-piece element comprising two components, wherein an opening element is held between the two components together with a support element. This allows for simple assembly, wherein the opening element is inserted between the two components of the bushing's two-piece element, and the sleeve, together with the supported opening element, can be clamped between the upper and base, for example, when using screws. In another embodiment, the bushing is a three-piece element comprising three components, which also allows for simple assembly of the bushing.
[0020] In one embodiment, the base is configured to have a short post integrally formed with the base, wherein a threaded hole is formed in a through-hole or blind hole in the short post. Forming the threaded hole as a blind hole allows for a smooth outer surface of the clamping body, especially at the bottom of the clamping body in contact with the warp yarns. Furthermore, screws screwed into the threaded hole will not protrude outside the clamping body, especially not beyond the base, and avoid any contact between the screws in the threaded hole and the weft or warp yarns. The threaded hole can be obtained by 3D printing or by machining the threaded hole from a 3D-printed portion.
[0021] In one embodiment, the short post is configured to have a slit at least near the bottom of the blind hole. This slit allows the adhesive used to hold the screw in the threaded hole to easily exit the blind hole, thereby enabling the screw to be screwed into the threaded hole along its entire length.
[0022] In one embodiment, the upper portion is connected to the base via a web, wherein the web includes a reinforcing element configured to counteract forces acting on the clamping body during use of the opening element. The design and orientation of the reinforcing element can be suitably selected by those skilled in the art to allow the mounting structure formed by the upper portion and the base to withstand forces acting on the mounting structure during use, and, if necessary, to allow the upper portion to move within a certain range toward the base for clamping the support unit for the opening element between the base and the upper portion.
[0023] In one embodiment, the reinforcing element is arranged at an angle relative to the base and the top, in other words, it has an inclined orientation from the top to the base.
[0024] In one embodiment where the opening element is a lever, a reinforcing element is arranged to allow reinforcement of the rotational or oscillating axis near the lever, particularly to counteract the force acting on the lever when the clamp is opened or closed, wherein the reinforcing element is arranged to allow a support unit designed as a bushing to be clamped between the upper and the base.
[0025] In one embodiment, the spring element is mounted on the clamp body using screws, as shown, for example, in US4739805 and / or WO 2009 / 135636 A1. In other embodiments, the clamp body includes a support for the spring element, which is integrally manufactured with the clamp body, wherein, in particular, in one embodiment, the support provides a form-fitting assembly for the spring element. Manufacturing a support that provides a form-fitting assembly for the spring element integrally manufactured with the clamp body allows the elimination of screws for securing the support for the spring element, thereby enabling the spring element to be held in position via, for example, a barbed clip or a bayonet engagement.
[0026] In one embodiment, the support does not protrude beyond the clamping body. Therefore, damage to the weft or warp yarns is avoided.
[0027] In one embodiment, the clamp further includes a guide for guiding the movable clamping element away from the hook when it moves out of the clamping position against the restoring force of the spring element. The guide is mounted on the clamp body via a guide support. In particular, in one embodiment, the guide support is integrally manufactured with the clamp body. Furthermore, by integrally manufacturing the guide support with the clamp body, the assembly of the clamp can be simplified.
[0028] In one embodiment, the clamp further includes supports for a guiding portion and / or supports for a reinforcing element, the guiding portion being disposed within an extension of the spar, and the reinforcing element being installed between the spar and the clamp. These supports can be integrally manufactured with the clamp, preferably by 3D printing, wherein, in particular, the supports for the guiding portion provide form-fitting components for the guiding portion, and the supports for the reinforcing element provide form-fitting components for the reinforcing element.
[0029] As described above, the design of the clamp body can be optimized by those skilled in the art for manufacturing using 3D printing, wherein, for example, large flat surfaces are avoided at the top, first side, and / or second side, and these portions are configured to have openings or perforations. Nevertheless, in embodiments of the invention, the base of the clamp body has a smooth outer surface at least in front of the opening element facing the hook. In the context of this application, a smooth surface is defined as a surface without perforations and / or undulations. In use, the outer surface of the base can contact the weft and / or warp yarns. If a smooth outer surface is provided, the outer surface capable of contacting the weft or warp yarns will not cause damage to the weft or warp yarns or will only cause minor damage. In one embodiment, a guide portion is provided on the outer surface of the clamp body in the region of the opening element. The guide portion in the embodiment is adapted to reinforce the clamp body, particularly to reinforce the clamping region of the support unit for the opening element.
[0030] In one embodiment, the movable clamping element is capable of moving at least substantially in the longitudinal direction of the clamping body against the restoring force of the spring element.
[0031] In one embodiment, the movable clamping element comprises a 3D-printed body having at least a partial hollow structure with an internal space surrounded by walls. For example, the body is printed from titanium.
[0032] According to a second aspect, a clamp assembly is provided, comprising a clamp having a clamp body and a clamping strap for carrying the clamp. The clamp body has a base, a first side, a second side, and a top portion, the base, the first side, the second side, and the top portion being integrally formed with each other. In particular, in one embodiment, a clamp assembly is provided with a flexible clamping strap, wherein the base of the clamp is arranged in an extension of the clamping strap.
[0033] According to a third aspect, a loom is provided, the loom including a clamp, particularly a receiving clamp, the clamp having a clamping body having a base, a first side, a second side, and an upper part, the base, the first side, the second side, and the upper part being integrally formed with each other.
[0034] According to a fourth aspect, a method for manufacturing a fixture is provided, the fixture having a clamping body having a base, a first side, and a second side, wherein the clamping body is at least partially formed using 3D printing. If the fixture is manufactured using 3D printing, it is possible to provide a clamping body that is at least partially enclosed, having a sufficiently rigid upper arrangement, wherein the number of screws or other fastening elements for securing the upper portion to the base can be minimized or even avoided. Attached Figure Description
[0035] In the following description, embodiments of the invention will be described in detail with reference to the accompanying drawings. Throughout the drawings, the same elements will be indicated by the same reference numerals.
[0036] Figure 1 One embodiment of the clamp is shown in a top perspective view. The clamp includes a clamp body and a clamping device.
[0037] Figure 2 Shown in perspective Figure 1 Details of the fixture.
[0038] Figure 3 Show Figure 1 The specific clamp is based on the view indicated by arrow III.
[0039] Figure 4 Shown in perspective Figure 1 The specific details of the clip.
[0040] Figure 5 Shown in top view Figure 2 Details of the fixture.
[0041] Figure 6 Show separately Figure 5 The opening element.
[0042] Figure 7 Shown in the sectional view Figure 5 Details.
[0043] Figure 8 Shown at magnification Figure 7 The details of the cross-section.
[0044] Figure 9 The diagram illustrates an alternative implementation method. Figure 8 Similar details.
[0045] Figure 10 Shown in the perspective drawing from below Figure 5 Details.
[0046] Figure 11 Showing with Figure 1 A similar clamp body has details of threaded blind holes, and the clamp body has guide supports for guides of the clamping device.
[0047] Figure 12 Show along Figure 11 The clamping device passes through the longitudinal direction Figure 11 The cross-section of the threaded blind hole.
[0048] Figure 13 Details of another embodiment of the clamping device are shown, the clamping device having features for use with... Figure 11 Another implementation of a similar guide member is a guide support member.
[0049] Figure 14 Details of yet another embodiment of the clamping device are shown, the clamping device having features for use with... Figure 11 Another implementation of a similar guide component is a guide support component.
[0050] Figure 15 Show Figure 1 Details of the clamping device, which has a support for the spring element for the clamping device.
[0051] Figure 16 Show Figure 1 Details of the clamp body, which has a support member for the guide portion of the spring element.
[0052] Figure 17 The exploded view shows the clamp, guide section, reinforcement elements, and sword shaft.
[0053] Figure 18 The clamp is shown before the guide portion is mounted on the clamp body, which is then mounted on the reinforcing element and the rapier.
[0054] Figure 19 Another embodiment of the clamp with springs is shown. Figure 16 Similar details.
[0055] Figure 20 Show Figure 19 Details before installing the spring.
[0056] Figure 21 Showing through Figure 17 Details of the section marked by arrow F21.
[0057] Figure 22 Shown in perspective Figure 1 Clamping elements.
[0058] Figure 23 Shown in the bottom view Figure 22 Clamping elements.
[0059] Figure 24 Shown in perspective Figure 22 Details of the clamping element IV.
[0060] Figure 25 Shown in the cross-sectional view Figure 22 The upper part of the clamping element.
[0061] Figure 26 The front region of the upper portion of the clamping element is shown in the bottom-view cross-sectional perspective view.
[0062] Figure 27 Show Figure 26 VII. Detail of the cross-sectional view of the clamping element.
[0063] Figure 28 Shown in perspective cross-sectional view with Figure 22 This is part of a second embodiment of a similar clamping element.
[0064] Figure 29 Shown in top view and Figure 22 A third embodiment of a similar clamping element.
[0065] Figure 30 Shown in top view and Figure 22 A fourth embodiment of a similar clamping element.
[0066] Figure 31 Shown in perspective cross-sectional view Figure 30 The lower part of the clamping element. Detailed Implementation
[0067] Figure 1 A clamp 1 for a rapier loom is shown, particularly a receiving clamp, which includes a clamp body 2 and a clamping device 3 for clamping the weft yarn. Figure 2 Show Figure 1 Details.
[0068] The clamping body 2 is an integral structure formed by 3D printing. The clamping body includes a base 20, a first side portion 21 adjacent to the base 20, a second side portion 22 opposite to the first side portion 21 adjacent to the base 20, and an upper portion 23. In the illustrated embodiment, the upper portion 23 is connected to the second side portion 22 via a web 24. Furthermore, the upper portion 23 is connected to the base 20 via a web 25.
[0069] In the described embodiment, the clamp body 2 is made of a light metal, such as titanium or aluminum. Forming the clamp body 2 as a monolithic structure by 3D printing allows the closed structure to have the required rigidity even when using light metals and / or thin profiles.
[0070] The clamp 1 shown in the attached drawings is a receiving clamp, wherein the proximal end of the base 20 of the clamp body 2 is mounted on the shank 5. A reinforcing element 4 is installed between the shank 5 and the clamp body 2. A guide portion 6 is provided on the outer surface of the base 20 of the clamp body 2, and this guide portion 6 is arranged in the extension of the shank 5. A hook 26 is provided at the distal end 10 of the clamp body 2 opposite to the shank 5.
[0071] The clamping device 3 includes a movable clamping element 30, a spring element 31, an opening element 32, and a guide 33. The movable clamping element 30 is movably mounted within the clamping body 2 so as to be movable substantially along the longitudinal direction of the clamp 1. The spring element 31 is configured to push the movable clamping element 30 toward the hook 26 for clamping the weft yarn between the movable clamping element 30 and the hook 26. To clamp the weft yarn, the movable clamping element 30 interacts with a first wing of the hook 26. In the illustrated embodiment, a retaining clamping element 34 made of abrasion-resistant material is provided at the first wing of the hook 26.
[0072] The opening element 32 is configured to cause the movable clamping element 30 to move away from the hook 26 against the restoring force of the spring element 31. Figure 1 and 2 The clamping device 3 shown includes a support element 36 for the spring element 31.
[0073] The guide 33 is configured to guide the movable clamping element 30 away from the hook 26 when the movable clamping element 30 moves out of the clamping position against the restoring force of the spring element 31. The guide 33 is fixed to the clamping body 2 using screws 35.
[0074] In the illustrated embodiment, the opening element 32 revolves around the pivot axis 320 (see...). Figure 2 and 8 It is pivotally mounted on the clamp body 2, wherein the first end 321 of the opening element 32 protrudes to the outside of the clamp body 2.
[0075] More specifically, in the illustrated embodiment, the opening element 32 is pivotally mounted between the upper portion 23 and the base 20 about the pivot axis 320 when using the screw 7. Support unit 9 (see...) Figures 7 to 9 The support unit 9 is arranged between the upper part 23 and the base 20, and will be described in more detail below.
[0076] Figure 3 According to Figure 1 The view of arrow III shows clamp body 2. Figure 4 The clamp body 2 is shown in a longitudinal view along its length. (See figure.) Figure 3 and 4 As shown, in the region of the upper part 23, the first side part 21 is higher than the second side part 22, and the web 24 connecting the upper part 23 and the second side part 22 and the web 25 connecting the upper part 23 and the base part 20 extend below the height of the top flanges 210, 220 of the first side part 21 and the second side part 22.
[0077] As in Figure 4As best seen in the middle, the upper part 23 is connected to the base 20 via a web 25, wherein the web 25 is configured as a reinforcing element, the reinforcing element being configured and arranged for use when the opening element 32 is used (see... Figure 1 and 2 That is, when the opening element 32 pivots around the pivot axis 320, it counteracts the force acting on the clamp body 2.
[0078] Figure 5 Show Figure 1 Details of the clamp 1, which has an opening element 32 of the clamping device 3 and a movable clamping element 30, wherein, for clarity, in Figure 5 The support element 36 for the spring element 31 of the clamping device 3 (not shown) Figure 1 and 2 ). Figure 6 The opening element 32 is shown separately. Figure 7 Shown in the sectional view Figure 5 The details, and Figure 8 Shown at magnification Figure 7 Details. For clarity, in Figure 7 The section lines are omitted in the text, while... Figure 8 The cross-sectional lines are shown in the figure. Figure 9 Show Figure 8 An alternative. Figure 10 Shown in the perspective drawing from below Figure 5 The details include the guide section 6.
[0079] As in Figure 6 As best seen in the diagram, the opening element 32 is in the form of a double-sided lever having a first end 321 and a second end 322. A through-hole is provided at the pivot axis 320, in which a bearing element 8 is mounted, for example, in which the bearing element 8 is bonded to the opening element 32. In the illustrated embodiment, the second end 322 of the opening element 32 includes a pin 325 projecting parallel to the pivot axis 320.
[0080] like Figure 5 and 6 As shown, the opening element 32 is pivotally mounted in the clamping body 2, wherein the first end 321 of the opening element 32 protrudes outside the clamping body 2, and the pin 325 of the second end 322 is connected to the movable clamping element 30, so that by pushing the first end 321 inward into the clamping body 2, the opening element 32... Figure 5 The clamping element 30, which can rotate clockwise in the drawing plane and move, overcomes the spring element 31 (see...). Figure 1 The force is away from the hook 26 (see Figure 1 )sports.
[0081] The opening element 32 is installed between the base 20 and the upper part 23, wherein, as in Figure 7 and 8 As best seen in the cross-sectional view, the first bearing housing 200 and the second bearing housing 230 are disposed on the opposing surfaces of the base 20 and the upper portion 23. More specifically, in the illustrated embodiment, the base 20 is configured to have a short post 201 integrally formed with the base 20, particularly by 3D printing, the short post protruding toward the upper portion 23, wherein the first bearing housing 200 is disposed at the short post 201.
[0082] exist Figure 8 In the illustrated embodiment, a support unit 9 forming a bushing is provided, which is clamped between the first bearing housing 200 and the second bearing housing 230 when screws 7 are used. The opening element 32 is rotatably mounted on the support unit 9 via the bearing element 8.
[0083] exist Figure 8 In the illustrated embodiment, the upper portion 23 is configured to have a through hole 232, and the base 20, more specifically the short post 201 of the base 20, is configured to have a threaded hole 202 aligned with the through hole 232. A screw 7 extends through the through hole 232 and the aligned threaded hole 202 to clamp the support unit 9 between the first bearing housing 200 and the second bearing housing 230. In the illustrated embodiment, the through hole 232 is tapered, allowing the use of a screw 7 with a tapered screw head. However, other designs are also possible.
[0084] like Figure 8 As shown, at each axial end of the support unit 9, the support unit 9 is configured to have a collar 90, wherein the collar 90 restricts the axial movement of the opening element 32 relative to the support unit 9 along the pivot axis 320. The collar 90 prevents the opening element 32 from contacting the bearing seats 200, 230 during its movement. Therefore, wear due to frictional contact between the opening element 32 and the clamping body 2 is avoided.
[0085] In the illustrated embodiment, the support unit 9 forming the bushing is a two-piece element comprising two components 91 and 92, wherein the opening element 32 is held between the two components 91 and 92 together with the support element 8. Each component 91 and 92 includes a collar 90 as described above. The arrangement of the two components 91 and 92 allows for simple assembly, wherein the two components 91 and 92 are arranged on opposite sides of the opening element 32, and the opening element 32 with the support element 8 is inserted between the two components 91 and 92. The assembly including the support unit 9 and the opening element 32 can then be clamped between the upper portion 23 and the base 20 using a screw 7. To secure the screw 7, the screw 7 can be glued into the threaded hole 202, wherein excess adhesive provided for securing the screw 7 can exit the threaded hole 202.
[0086] Figure 9 An alternative embodiment of the support unit 9 for forming the bushing is shown, wherein the support unit 9 is a three-piece element comprising three parts 93, 94, and 95, wherein an opening element 32, together with a support element 8, is held along part 93 between two parts 94 and 95. Each part 94 and 95 is in the form of a disk and achieves the following for... Figure 8 The function of the collar 90 is described. The three-piece support unit 9 can be easily arranged between the upper part 23 and the base 20, and can be fixed using screws 7.
[0087] Figure 11 and 12 Showing with Figure 1 The clamp body is similar in detail to clamp body 2, which has a guide 33 for clamping device 3 (see details). Figure 1 The guide support 27. Figure 11 and 12 In the embodiment shown, the guide support 27 includes a short post 270 having a threaded blind hole 271 and a slit 272. The guide support 27 is integrally formed with the fixture body 2 by 3D printing. More specifically, the short post 270 of the guide support 27 protrudes from the base 20 toward the interior of the fixture body 2. In one embodiment, the screw thread 273 at the blind hole 271 is formed during the 3D printing of the fixture body 2, wherein no additional machining is required. In other embodiments, the screw thread 273 is machined into the short post 270 after the fixture body 2 is formed. For example, to form the screw thread 273 of the threaded blind hole 271, the short post 270 is integrally formed with the base 20 by 3D printing. Next, a drill hole is drilled in the short post 270, and the screw thread 273 is formed in the drill hole using a thread tap. This allows for the formation of a high-quality threaded blind hole 271.
[0088] exist Figure 11The design shown allows for the use of screws 35 to secure guide 33 (see...). Figure 1 The screw 35 can be secured to the threaded blind hole 271 using adhesive, wherein excess adhesive can flow out of the threaded blind hole 271 through the slit 272. (As in...) Figure 10 and 12 As best seen in the image, the base 20 of the clamp body 2 has a smooth outer surface in front of the opening element 32 facing the hook 26, especially the base 20 of the clamp body 2 opposite to the short post 270. This is beneficial for engagement with the warp thread. The smooth outer surface without openings also helps to prevent the clamp body 2 from breaking due to fatigue.
[0089] Figure 13 and 14 Details of another embodiment of the clamp body 2 are shown, which clamp body has a design for engaging with... Figure 11 Another embodiment of the similar guide device 33 includes a guide support 27. In Figure 13 and 14 In the embodiment shown, the guide 33 is in every case a bent leaf spring that contacts the first end of the movable clamping element 30 of the clamping device 3 and is mounted on the clamping body 2 with the opposite end. Between the two ends, the guide 33 abuts against the first side 21 of the clamping body 2.
[0090] Figure 5 and 15 All shown Figure 1 Details of the clamp body 2, which has a support 28 for the spring element 31 of the clamping device 3, and in particular two supports 28 having a support element 36 for the spring element 31. Figure 5 Show Figure 15 The details are shown, but it does not have the support element 36 for the spring element 31, thus allowing the two support members 28 to be seen. Figure 5 and 15 The support member 28 shown can form a barbed clip.
[0091] Figure 16 Another embodiment of the clamp body 2 is shown. Figure 15 Similar details, among which, Figure 16 In the embodiment shown, the support member 28 and the support element 36 form a bayonet-type fit.
[0092] Figure 17 The clamp assembly 40 is shown in the disassembled state, the clamp assembly including as follows Figure 1The clamp 1 shown comprises a clamp body 2, a reinforcing element 4, a shank 5, and a guide portion 6. The guide portion 6 has multiple protrusions 60 and 61 for positioning and / or securing the guide portion 6 relative to the clamp body 2. The clamp body 2 has supports 50 and 54 for engaging with the protrusions 60 and 61. In one embodiment, the support 50 of the clamp body 2 is shaped as a circular opening (see...). Figure 5 and 7 The circular protrusion 60 of the guide portion 6 can mate with the circular protrusion 60 of the guide portion 6 to provide a form-fitting assembly between the circular protrusion 60 of the guide portion 6 and the support member 50 of the clamp body 2. Furthermore, the support member 54 of the clamp body 2, which is shaped as a rectangular opening, can mate with the rectangular protrusion 61 of the guide portion 6 to provide a form-fitting assembly between the rectangular protrusion 61 of the guide portion 6 and the rectangular support member 54 of the clamp body 2. In other embodiments, support members and protrusions with other shapes are provided.
[0093] In one embodiment, when the jig body 2 is formed using 3D printing technology, open supports 50 and 54 are formed in the base 20. In one example, the protrusions 60 and 61 of the guide portion 6 have a shape that widens from the base of the guide portion 6 over a distance longer than the thickness of the base 20 of the jig body 2, and then narrows again toward the distal end of the protrusions 60 and 61, allowing the protrusions 60 and 61 to engage with the corresponding supports 50 and 54 in the base 20 of the jig body 2. Alternatively or additionally, the guide portion 6 can be bonded to the jig body 2. In another alternative embodiment, the protrusions are provided on the base 20 of the jig body 2, and the corresponding supports or openings are provided in the guide portion 6.
[0094] In the illustrated embodiment, the reinforcing element 4 is secured to the sword shank 5 via a plurality of fastening elements, such as bolts 42, washers 43, 44, and nuts 45. One of the bolts 42 extends through an opening 46 in the sword shank 5, an opening 47 in the base 20, and an opening 48 in the reinforcing element 4, thereby allowing the base 20 to be clamped between the reinforcing element 4 and the sword shank 5. The other bolts 42 extend only through the reinforcing element 4 and the sword shank 5. Furthermore, the base 20 includes, for example, at least one support 51 for the reinforcing element 4, such as at least one support 51 integrally manufactured with the clamping body 2 by 3D printing, wherein, in particular, the support 51 for the reinforcing element 4 can provide a form-fitting assembly for the reinforcing element 4. Alternatively or additionally, as in Figure 17 As shown in the embodiment, two support members 51 are provided. These support members are threaded supports that can mate with washers 52 and nuts 53 to secure the reinforcing element 4 to the base 20 of the clamp body 2. Other shaped-fit components are also possible.
[0095] Figure 18 Showing with Figure 17 The clamp is similar to clamp 1 in the following state: In this state, the clamp body 2 is mounted on the rapier 5 via a reinforcing element 4 and a guide portion 6 to be mounted on the clamp body 2. This arrangement allows for easy replacement of the guide portion 6, for example, for replacing a worn guide portion via another guide portion. Before or after the clamp body 2 is mounted on the rapier 5, the movable clamping element 30, spring element 31, and opening element 32 (see...) are movable. Figure 17 It can be installed on the fixture 2.
[0096] Figure 19 and 20 Details of another embodiment of the clamp 1 are shown, the clamp including a clamp body 2 and a clamping device 3, wherein the clamp body 2 is an integral structure formed by 3D printing.
[0097] like Figure 19 and 20 The clamp body 2 shown includes a base 20, a first side portion 21 adjacent to the base 20, a second side portion 22 opposite to the first side portion 21 adjacent to the base 20, and an upper portion 23. Figure 19 and 20 In the embodiment shown, the upper part 23 is connected to the base 20 only via the web 25. The support member 28 and the support element 36 are... Figure 16 Similarly, in this configuration, the support member 28 and the support element 36 form a bayonet-like fit. (Instead of...) Figure 16 The support member 51 is located at the ground. Figure 19 and 20 The clamp body 2 shown has an opening 49 for a screw used to secure the reinforcing element 4 to the clamp body 2.
[0098] exist Figure 20 The image shows the state just before the support element 36 is positioned on the support member 28, wherein the support element 36 rotates about the longitudinal length of the spring element 31. The support element 36 is capable of... Figure 19 and 20 The positions shown are shifted and rotated to form a bayonet fit.
[0099] In order to mount the opening element 32 to Figure 8 In an alternative embodiment (not shown) of a similar clamp body, instead of a clamp body 2 having a base 20 with a short post 201, a clamp body 2 having a base 20 is provided, the base 20 having a similar... Figure 12 The guide support 27 shown is a similar guide support. The opening element 32 can be mounted between the guide support at the base 20 and the upper part 23 via the support unit 9. For example, as... Figure 12As shown, the guide support has a threaded blind hole 271, wherein a slit 272 is provided near the bottom of the threaded blind hole 271. Subsequently, the assembly including the support unit 9 and the opening element 32 can be clamped between the upper part 23 and the base 20 using a screw 7. To secure the screw 7, the screw 7 can be glued into the threaded blind hole 271, wherein the slit 272 allows excess adhesive used to secure the screw 7 in the threaded blind hole 271 to exit the threaded blind hole 271.
[0100] In one embodiment (not shown), the distal end 10 of the clamp body 2 is provided with protruding ribs on one or both sides, which are configured to shield the end of the hook 26 from contact with the warp threads. In this embodiment, the protruding ribs can be integrally formed with the clamp body 2 by 3D printing.
[0101] exist Figure 21 In the illustrated embodiment, the movable clamping element 30 is guided between two guides 70 and 71. Guide 70 is located at a top 29, which is positioned near the hook 26 and above a portion 41 of the base 20, which is also positioned near the hook 26. Guide 71 is located at portion 41 of the base 20. Guides 70 and 71 prevent the movable clamping element 30 from moving between the guides 70 and 71.
[0102] like Figure 1 As shown, the movable clamping element 30, also known as a clamping element or clamping tongue, is configured to contact the hook 26 of the clamping body 2 of the clamping assembly 1 and the fixed clamping element 34 for clamping the weft yarn.
[0103] The clamping element 30 is mounted on the clamp body 2 so that it can move substantially along the longitudinal direction of the clamp 2. Figure 1 Clamping element 30 in Figures 22 to 28 It is shown separately in multiple views.
[0104] The clamping element 30 has a body 18. The body 18 can be made of titanium, and preferably, the body 18 is 3D printed. In the illustrated embodiment, at the proximal end 14, i.e., at the end facing the shank 5 (see... Figure 1 The main body 18 at the location is configured to have an eyelet 16. In the illustrated embodiment, a bearing element 17 is provided, which is configured to mount the clamping element 30 onto the ring-shaped opening element 32 (see Figure 1 The bearing element 17 is made of wear-resistant material and is therefore also called a wear-resistant bearing element or simply a wear-resistant element.
[0105] At the distal end 15 of the main body 18, a contact element 19 is provided, which is configured to contact the clamping surface of the hook 26 of the clamping body 2 (see...). Figure 1 Contact element 19 is made of wear-resistant material and is therefore also called wear-resistant contact element or simply wear-resistant element.
[0106] Between the distal end 15 and the proximal end 14, the body 18 is configured to have a support element 64, which is, for example, a protrusion. The support element 64 is configured to contact the guide 33 of the clamp 1 (see...). Figure 1 In the illustrated embodiment, the support element 64 is shaped like a wedge and is integrally formed with the body 18. In one embodiment, a wear-resistant coating is provided on the support element 64.
[0107] like Figures 25 to 27 As shown in the cross-sectional view, the body 18 in the illustrated embodiment has a hollow structure with an internal space 66 surrounded by a wall 37. In the illustrated embodiment, the wall 37 has a lower surface 371, an upper surface 372, a first side surface 373, and a second side surface 374. To prevent powder from the powder bed used for 3D printing from accumulating in the internal space 66, cutouts 370 are provided in the wall 37 (see...). Figure 27 This is to allow the aggregated powder to escape. In this embodiment, the cut 370 is provided in the lower surface 371 of the wall 37 near the distal end 15 of the body 18. However, this design is merely exemplary, and other locations for the cut are conceivable.
[0108] Due to its hollow structure, the weight of the main body 18 is reduced compared to a solid structure. Furthermore, because the internal space 66 is surrounded by walls 37, i.e., restricted in all spatial directions, the main body 18 possesses sufficient strength and resistance to impact and vibration. Such a main body 18 can be manufactured using 3D printing.
[0109] As shown in the figure, in the illustrated embodiment, the thickness of wall 37 is not constant. The thickness and / or variation in thickness will be selected by a person skilled in the art, taking into account boundary conditions such as the load applied to a specific area of body 18 and / or the material used for printing on body 18.
[0110] The external structure of the contact element 19 is adapted to the design of the clamp body 2. In the illustrated embodiment, the external structure is configured to allow the contact element 19 to engage with the hook bend of the hook 26 of the clamp body 2 (see...). Figure 1 ).
[0111] like Figure 24As shown in the details, in the illustrated embodiment, the contact element 19 is configured to have a guide structure 330 that is form-fitted with the hook 26 (see...). Figure 1 The complementary structures (not shown) on the contact element 19 interact to allow guided movement of the contact element 19 into and out of the hook bend.
[0112] In the illustrated embodiment, end 38 is a pointed end. Contact element 19 is V-shaped and attached to the pointed end. The body 18 at end 38 is configured with a mounting structure 380 having a protrusion 381, wherein the contact element 19 contacts the body 18 at the protrusion 381, thereby forming a gap 384 defined by the protrusion 381 between the body 18 and the contact element 19. The mounting structure 380 facilitates bonding or soldering the contact element 19 to the body 18, wherein the gap 384 allows a defined amount of adhesive or solder to be disposed between the body 18 and the contact element 19.
[0113] As in Figure 26 As best seen in the illustrated embodiment, the support element 64 is integrally formed with the body 18 and has a hollow structure, wherein the internal space 66 has a region for the support element 64. To increase rigidity, ribs 340 are provided in the region of the support element 64, extending from the first side surface 373 between the lower surface 371 and the upper surface 372 and perpendicular to both surfaces. In another embodiment, the support element 64 has a solid structure. In yet another embodiment, instead of or in addition to the support element 64, a support element made of a wear-resistant material is provided, which is attached to the body 18.
[0114] As described above, in the illustrated embodiment, the bearing element 17 is disposed at the eyelet 16. The bearing element 17 is bonded to the eyelet 16. (As in...) Figure 27 As best seen in the image, the orifice communicates via outlet 310 with a hollow structure having an internal space 66 to allow excess adhesive to be extruded from the area of the orifice 16.
[0115] exist Figure 28 In the illustrated embodiment, the end 38 has a hollow structure, wherein ribs 382 extending parallel to the lower surface 371 and upper surface 372 of the wall 37 are disposed within the internal space 66 in the region of the end 38 to increase rigidity, particularly to ensure that the clamping element 30 has sufficient rigidity in the clamping region. In other embodiments, the end 38 is a solid structure. Figure 28In the illustrated embodiment, the body 18 has a solid portion 39, i.e., a portion with a solid structure, which is located near the proximal end 14 of the body 18, particularly near the eyelet 16. Ribs 340 extending between the lower surface 371 and the upper surface 372 and perpendicular to the lower surface 371 and the upper surface 372 are provided in the region of the support element 64 to increase rigidity.
[0116] Figure 29 The clamping element 30 is shown in the top view. Figures 21 to 28 The clamping element shown is implemented in a similar manner. Figure 29 The clamping element 30 shown in the figure is in Figures 21 to 28 The difference in the clamping element shown lies in the shape of the end 38 and the shape of the contact element 19 attached to the tip 38. Figure 29 In the embodiment shown, the contact element 19 is attached to only one side surface, particularly to the first side surface 373 of the wall 37 in the embodiment shown.
[0117] Figure 30 and 31 Show the same as in the top view and sectional view respectively. Figure 22 Another embodiment of the clamping element 30, similar to the clamping element shown in the diagram. Figure 30 and 31 In the illustrated embodiment, the contact element 19 is attached to only one side surface, particularly in the illustrated embodiment, to the first side surface 373 of the wall 37 of the clamping element 30. Figure 30 and 31 In the illustrated embodiment, the first mounting structure 380 configured to mount the contact element 19 onto the body 18 is provided with a cavity 383 for adhesive or solder. The cavity 383 is provided with an outlet 311 for excess adhesive or solder.
[0118] Figure 30 and 31 The clamping element 30 shown is Figure 22 The difference in the clamping element shown is that the cutout 370 is provided not only on the lower surface 371 of the wall 37, but also on the upper surface 372 of the wall 37. Furthermore, Figure 30 and 31 The clamping element 30 shown is Figures 21 to 28The difference in the clamping element shown is that the rib 340 provided at the support element 64 extends between the first side surface 373 and the second side surface 374 of the wall 37, and also extends between and perpendicular to the lower surface 371 and the upper surface 372. In one embodiment, the rib 340 extends between the lower surface 371 and the upper surface 372, dividing the internal space 66 into multiple segments. In other embodiments, the rib 340 does not extend entirely between the lower surface 371 and the upper surface 372 to avoid powder accumulation.
[0119] exist Figures 21 to 31 The specific combinations of elements and features in the illustrated embodiments are merely exemplary and can be varied, especially by interchange and substitution of features shown in one embodiment with features shown in other embodiments.
[0120] exist Figures 21 to 31 In the illustrated embodiment, the internal space 66 of the body 18 is empty. In other embodiments, reinforcing elements or fillers are disposed within the internal space 66 of the body 18. For example, reinforcing elements or fillers can be disposed within the internal space 66 of the body 18 via a cutout 370.
[0121] Figures 1 to 31 The illustrated embodiments are merely exemplary, and other embodiments are conceivable, wherein a clamping body 2 is provided, having a base 20, a first side 21, a second side 22, and a top 23, and the clamping body is an integral structure formed by 3D printing. The clamping body 2 in the embodiments is integrally formed with a structure that allows for the mounting of elements and / or additional elements of the clamping device 3 of the clamping fixture 1.
Claims
1. A clamp for a rapier loom, wherein, The clamp (1) includes a clamp body (2) and a clamping device (3) for clamping the weft yarn. The clamp body (2) includes a base (20), a first side (21) adjacent to the base (20), a second side (22) adjacent to the base (20) opposite to the first side (21), and a hook (26). The hook is disposed at the distal end (10) of the clamp body (2). The clamping device (3) includes a movable clamping element (30), a spring element (31), and an opening element (32). The movable clamping element (30) is movably mounted in the clamp body (2). The spring element (31) is configured to push the movable clamping element (30) toward the hook (26) to clamp the weft yarn in the movable clamping device. Between the element (30) and the hook (26), and wherein the opening element (32) is configured to move the movable clamping element (30) away from the hook (26) against the restoring force of the spring element (31), characterized in that the clamping body (2) includes an upper portion (23) opposite to the base (20), wherein the upper portion (23) is adjacent to the first side portion (21) and connected via webs (24, 25) to at least one of the second side portion (22) and the base (20), wherein the first side portion (21), the second side portion (22), the upper portion (23) and the webs (24, 25) are integrally formed with the base (20), and wherein the opening element (32) is mounted between the upper portion (23) and the base (20).
2. The clamp according to claim 1, characterized in that, The web (24, 25) connecting the upper part (23) to the base (20) and / or to the second side (22) extends to below the height of the top flange (210, 220) of the first side (21) and the second side (22).
3. The clamp according to claim 1 or 2, characterized in that, The clamp body (2) is made of titanium.
4. The clamp according to claim 3, characterized in that, The clamp body (2) is formed using 3D printing.
5. The clamp according to claim 1 or 2, characterized in that, The first bearing housing (200) and the second bearing housing (230) are disposed on the opposing surfaces of the base (20) and the upper part (23), wherein the support unit (9) for supporting the opening element (32) is clamped between the first bearing housing (200) and the second bearing housing (230).
6. The clamp according to claim 5, characterized in that, One of the first bearing housing (200) and the second bearing housing (230) is configured to have a through hole (232) and the other is configured to have an aligned threaded hole (202), and a screw (7) extends through the through hole (232) and the aligned threaded hole (202) for clamping the support unit (9).
7. The clamp according to claim 5, characterized in that, The support unit (9) is a bushing and the opening element (32) is a lever, which is rotatably mounted on the support unit (9) via a bearing element (8).
8. The clamp according to claim 7, characterized in that, At each axial end of the support unit (9), the support unit (9) is configured to have a collar (90), wherein the collar (90) restricts the axial movement of the opening element (32) relative to the support unit (9).
9. The clamp according to claim 6, characterized in that, The base (20) is configured to have a short post (201) integrally formed with the base (20), wherein the threaded hole (202) is formed in the short post (201).
10. The clamp according to claim 1, characterized in that, The upper part (23) is connected to the base (20) via the web (25), wherein the web (25) includes a reinforcing element configured to counteract the force acting on the clamp body (2) when the opening element (32) is used.
11. The clamp according to claim 1, characterized in that, The clamping body (2) includes at least one of a support (28) for the spring element (31), a support (50, 54) for the guide portion (6), and a support (51) for the reinforcing element (4), the guide portion being arranged in the extension of the sword (5), the reinforcing element being installed between the sword (5) and the clamping body (2), and the support (51) for the reinforcing element (4) being integrally manufactured with the clamping body (2).
12. The clamp according to claim 11, characterized in that, The support member (28) for the spring element (31) provides a form-fitting assembly for the spring element (31), the support members (50, 54) for the guide portion (6) provide a form-fitting assembly for the guide portion (6), and the support member (51) for the reinforcing element (4) provides a form-fitting assembly for the reinforcing element (4).
13. The clamp according to claim 1, characterized in that, The clamp (1) includes a guide (33) for guiding the movable clamping element (30) away from the hook (26) when the movable clamping element (30) moves out of the clamping position against the restoring force of the spring element (31), wherein the guide (33) is mounted on the clamp body (2) by a guide support (27).
14. The clamp according to claim 13, characterized in that, The guide support (27) is manufactured integrally with the clamping body (2).
15. The clamp according to claim 13, characterized in that, The guide support (27) and the clamping body (2) are manufactured as a single unit by 3D printing.
16. The clamp according to claim 1, characterized in that, The base (20) of the clamp body (2) has an outer surface at least in front of the opening element (32) of the hook (26) such that the outer surface does not have perforations and / or undulations.
17. The clamp according to claim 1, characterized in that, The movable clamping element (30) is at least substantially capable of moving against the restoring force of the spring element (31) in the longitudinal direction of the clamping body (2).
18. The clamp according to claim 1, characterized in that, The movable clamping element (30) includes a 3D-printed body (300) having at least a partial hollow structure with an internal space (66) surrounded by a wall (37).
19. The clamp according to claim 18, characterized in that, The main body (300) is printed from titanium.
20. A clamping assembly, characterized in that, The clamp assembly (40) includes a clamp (1) according to any one of claims 1 to 19 and a sword shaft (5) for carrying the clamp (1), the clamp having a clamp body (2), wherein the base (20) of the clamp body (2) is arranged in an extension of the sword shaft (5).
21. The clamping assembly according to claim 20, characterized in that, The sword shaft is a flexible clamp belt.
22. A loom, characterized in that, The loom includes a clamp (1) according to any one of claims 1 to 19.
23. A method for manufacturing a fixture according to any one of claims 1 to 19, wherein, The clamping body (2) is formed at least in part using 3D printing.
Citation Information
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