• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:BE1019756A3
    申请号:E201000504
    申请日:2010-08-25
    公开日:2012-12-04
    发明作者:
    申请人:Toyota Jidoshokki Kk；
    IPC主号:
    专利说明:

    FRAME WIRE DETECTOR FOR WEAVING
    TYPE A JET
    FOUNDATION OF THE INVENTION
    The present invention relates to a weft yarn sensor for a jet-type loom that ejects fluid to propel a weft yarn through warp yarns and which mounts the weft yarn propelled with combs onto a flapper.
    Japanese Patent Laid-Open Publication No. 5-71046 discloses a weft detector including a light-projection optical fiber and a light-receiving optical fiber for monitoring the flight status of a light source. weft yarn, which strongly affects the quality of a fabric. The light-projection optical fiber and the light-receiving optical fiber are arranged in an optical fiber conduit which extends through a support member (support housing) which moves inwardly and outwardly a crowd formed between rows of warp threads. When the distal portion of the weft yarn flying through a weft guiding passageway (passage for theft) enters a projection range of the light-projection optical fiber, the light projected from the distal surface ( light projection surface) of the light projection optical fiber is reflected by the distal portion of the weft yarn and is received by the distal surface (light receiving surface) of the light receiving optical fiber.
    As shown in FIG. 7 of the publication described above, to obtain a perfectly incident light on the weft yarn flying through the weft guide passageway, the distal side (side concerned with the passage of guiding the weft yarn) of the light-projection optical fiber must have a curvature to orient the light-projection optical fiber towards the weft guide passage. In addition, to correctly receive the light reflected by the weft yarn, the distal side (the side concerned by the weft guide passage) of the light-receiving optical fiber must represent a curvature to orient the optical fiber of the light-receiving optical fiber. receiving light in the direction of the weft guide passage.
    In this manner, the fiber optic conduit must have a curvature at the distal side of the support member. When inserting an optical fiber into the fiber optic conduit, the optical fiber that is inserted from the base of the fiber optic conduit must have a curvature in accordance with the fiber optic conduit. However, it is difficult to bend the optical fiber during insertion.
    The optical fibers, which are arranged in the support member which moves inwardly and outwardly of a shed formed between the warp threads, may wear due to friction with the warp threads. Glass fibers that have superior wear resistance can be used for optical fibers. However, it is difficult to bend glass fibers when it comes to bending them when they are inserted.
    Accordingly, the support member may be two segments, each segment having a recess. By joining the two segments, the recesses form a conduit for optical fiber between the two segments. Such a structure makes it easy to insert the optical fibers, which are curved in advance in accordance with the configuration of the optical fiber conduit, into the fiber optic conduit.
    An adhesive agent can be used to join and adhere the two segments to each other. However, the adhesive is likely to spread out of the area between the joined surface of the two segments. As the spreading adhesive solidifies, the warp yarns can rub against the solidified adhesive agent, so that they can break.
    In order to prevent wear caused by friction with the warp yarns, it is desirable to make the support member, which moves inwardly and outwardly of a shed formed between rows of warp yarns. , from a metallic material. In addition, to avoid problems resulting from friction against the adhesive, it is preferable to weld two metal segments to one another. Cutting of the warp yarns caused by the friction of the support member against warp yarns by grinding of the welded surface can be prevented following welding.
    However, when the two segments are welded to each other after arranging the optical fibers together, the heat generated by the weld is likely to deform the optical fibers. This situation can lead to a decrease in the light transmission capacity of the optical fibers.
    SUMMARY OF THE INVENTION
    It is an object of the present invention to insert optical fibers into a carrier housing that moves inwardly and outwardly of a shed formed between rows of warp yarns, without decreasing the transmission capacity of light manifested by the optical fibers.
    One aspect of the present invention relates to a weft yarn detector for a jet type loom, including a tapered comb, a weft yarn which has been propelled by an ejected fluid, into a shed formed between two rows of warp threads, and a flapper holding the comb. The weft detector is provided with a support housing which includes a conduit for the fibers and which is arranged on the wing. The support housing moves inwardly and outwardly of the shed via a free space formed between warp yarns in one of the two rows of warp yarns. The support housing has a first side surface oriented toward the comb and a second side surface away from the first side surface and facing toward a cut. An optical fiber which represents at least one light-projection optical fiber and a light-receiving optical fiber, is arranged in the fiber duct so as to face a passage for the flight of a weft yarn formed by the comb. The fiber conduit includes a distal opening disposed on the distal side of the support housing facing the passage for theft, an insertion opening disposed at the base of the support housing and used for insertion of the fiber optical, and a curved conduit extending between the insertion opening and the distal opening. The insertion opening opens into at least one surface selected from the first lateral surface and the second lateral surface.
    Other aspects and advantages of the present invention will become apparent from the following description when taken in conjunction with the accompanying drawings which illustrate by way of example the principles of the invention.
    BRIEF DESCRIPTION OF THE DRAWINGS
    The invention, together with its objects and advantages, can best be understood by reference to the following description of the presently preferred embodiments, together with the accompanying drawings in which: FIG. 1 is a perspective view in which there is shown a jet-type loom including a weft detector according to a first embodiment of the present invention; Fig. 2A is a cross-sectional side view showing a support member of Fig. 1; Fig. 2B is a cross-sectional side view showing an auxiliary jet weft propelling nozzle of Fig. 1; Fig. 3A is a cross-sectional side view showing a support member of Fig. 2A; Fig. 3B is a cross-sectional side view showing the support case of Fig. 3A; Fig. 4A is a cross-sectional side view showing the support case of Fig. 2A; Figure 4B is an enlarged partial view of Figure 4A; Fig. 5A is a cross-sectional view taken along line 5A-5A in Fig. 3A; Fig. 5B is a cross-sectional view taken along line 5B-5B in Fig. 3A; Fig. 5C is a cross-sectional view taken along line 5C-5C in Fig. 3A; Figure 5D is a cross-sectional view taken along line 5D-5D in Figure 3A; Figure 6A is a schematic plan view of Figure 1; Figure 6B is a cross-sectional side view of Figure 3A; Figs. 7A to 7F are diagrams showing the processes for inserting glass fibers; Fig. 8 is a cross-sectional view showing another embodiment; Fig. 9 is a cross-sectional view showing another embodiment; Figure 10 is a cross-sectional view showing another embodiment.
    DETAILED DESCRIPTION OF THE EMBODIMENTS
    PREFERRED
    A first embodiment of the present invention will now be discussed with reference to Figs. 1-7.
    Referring to FIG. 1, a leaf 11 has a main weft propellant nozzle 12 that ejects air (fluid) to propel a weft yarn through a shed formed between two rows of threads. chain T. Several auxiliary weft propulsion nozzles 13 are arranged in alignment along a mounting surface 111 which is defined by a front surface of the wing 11. The auxiliary nozzles 13 respectively eject air from an ejection hole 131 (as can be seen in FIGS. 2B and 6A) so as to relay the weft yarn Y which has been propelled into the crowd of the T warp yarns. Consequently, the weft yarn Fly through a passage for the flight 142 extending between the combs 141 of a wing 14.
    After propelling a predetermined length of the weft yarn Y through the shed, the combs 141 of the leaf 14, which oscillates integrally with the leaf 11, tamp the Y weft yarn against the cut W1 of a woven fabric W.
    As shown in FIGS. 2A and 2B, a support groove 16 extends through the mounting surface 111 in the longitudinal direction of the leaf 11. The support groove 16 includes a narrow portion 161 which opens on the mounting surface 111, a wide portion 162 which is formed below the narrow portion 161 and a step 163. The step 163 between the narrow portion 161 and the wide portion 162 extends parallel to the mounting surface 111.
    Referring to FIG. 2A, it can be seen that a plurality of support blocks 17 are coupled to the mounting surface 111. Each support block 17 receives two bolts 18. Each bolt 18 has a threaded portion 181 which includes a distal portion protrusion outside the support block 17. A locking nut 19 is fixed to the projecting portion of the bolt 18. The bolt 18 has a hexagonal head 182 which is housed in the wide portion 162. The corners of the head 182 abut the surface of --------- walls of the wide portion 162 to allow the tightening of the locking nut 19. The tightening of the locking nut 19 forces the head 182 against the step 163 and fixed the support block 17 against the wing 11. The coupling position of the support block 17 can be modified in the longitudinal direction of the wing 11.
    Referring to FIG. 2B, it can be seen that support blocks 15 which support the auxiliary nozzles 13 are coupled to the wing 11 via a means which is identical to the means for coupling the support blocks 17 to the wing 11, more specifically bolts 18 and lock nuts 19. Each auxiliary nozzle 13 has a distal portion which moves inwardly and outwardly of the shed via a free space formed between the warp yarns T during oscillation of the flying 11.
    Referring to FIGS. 3A and 4A, a tubular support 26 is attached to each support block 17. The support 26 includes an upper side defining a diameter tube 27 and a lower side defining a large diameter tube 28. The large diameter tube 28 has a diameter which is larger than that of the small diameter tube 27. The small diameter tube 27 has a cavity in which is housed a metal support housing 20 in the form of a rod.
    As shown in FIG. 2A, the support housing 20 has a distal portion 23 which moves towards and away from the shed via a free space formed between the warp yarns T when the leaf 11 is swinging. The support 26 and the support housing 20 form a support member which .................
    is able to move towards and away from the crowd through a free space formed between the T-warp wires.
    With reference to FIGS. 5A to 5D, the housing 20 is formed by joining two segments 24 and 25.
    As shown in FIG. 5B, the segment 24 has a base side defining a retaining cavity 291 and the segment 25 has a base side defining a retaining cavity 292. In addition, the segment 24 has a distal side encompassing two communication cavities 301 and 311 and the segment 25 has a distal side encompassing two communication cavities 302 and 312.
    Referring to FIG. 3B, the communication cavities 301 and 311 are continuous with the retaining cavity 291. The communication cavities 320 and 311 represent linear grooves which extend parallel to each other. The retaining cavity 291 includes a curved cavity portion 341 whose curvature is near the continuous portion with the communication cavity 301 and 311, and a straight cavity portion 351 which is continuous with the curved cavity portion 341. The retaining cavity 291 has an opening 321 which opens in a base portion of the segment 24 and in a rear portion of the segment 24 facing the combs 141.
    The curved cavity portion 341 is formed by a conduit-forming wall. The portion of the duct wall closer to the combs 141 includes a curved segment surface 331 (as can be seen in FIG. 3B). The curved cavity portion 341 narrows from the opening 321 toward the communication cavity 311 so that the wall surface of the conduit formation closer to the combs 141 is close to the opposite wall surface.
    Referring to FIG. 4A, the communication cavities 302 and 312 are continuous with the retaining cavity 292. The communication cavities 302 and 312 represent linear grooves extending parallel to each other. The retaining cavity 292 includes a curved cavity portion 342 which is curved near the continuous portion with the communication cavities 302 and 312, and a straight cavity portion 352 which is continuous with the curved cavity portion 342. The cavity retainer 292 has an opening 322 which opens into a base portion of the segment 25 and into a rear portion of the segment 25 facing the combs 141.
    The curved cavity portion 342 is formed by a conduit-forming wall. The portion of the duct wall closer to the combs 141 includes a curved segment surface 331 (as can be seen in FIG. 3B), the curvature extending towards the combs 141. The curved cavity portion 342 narrows between the opening 322 and the communication cavity 312, such that the surface of the duct wall which is closer to the combs 141 approaches the opposite wall surface.
    As shown in FIG. 5A, in a state in which the joining surfaces 241 and 251 of the segments 24 and 25 are joined to each other, the holding cavities 291 and 292 form a retaining conduit 29. In addition, the straight cavity portions 351 and 352, which form part of the holding cavities 291 and 292, form a straight conduit 35 which forms part of the retaining conduit 29.
    As shown in FIG. 5B, in a state in which the joining surfaces 241 and 251 of the segments 2425 are joined to each other, the communication cavities 301 and 302 form a first communication conduit 30 which is placed in communication with one another. In addition, in a state in which the joining surfaces 241 and 251 of the segments 24 and 25 are joined to each other, the communication cavities 311 and 312 form a second communication conduit. 31 which is communicated with the restraining duct 29.
    As shown in FIGS. 3A and 4A, the first communication conduit 30 and the second communication conduit 31 extend in parallel in the direction in which the T chain wires extend. The first communication conduit 30 has an opening light projection 303 facing the passage for the flight 142 and the second communication conduit 31 has a light-receiving opening 313 facing the passage for the flight 142. The light projection opening 303 serves as distal opening, is spaced from the light receiving aperture 313 which also serves as a distal opening.
    The first communication conduit 30 and the retaining conduit 29 form a first fiber conduit for insertion of a light projection glass fiber 21, i.e., an optical fiber.
    The second communication duct 31 and the retaining duct 29 form a second fiber duct intended for the insertion of a light-receiving glass fiber 22, namely an optical fiber.
    As shown in FIG. 5B, in a state in which the joining surfaces 241 and 251 of the segments 24 and 25 are joined to each other, the openings 321 and 322 form an insertion opening 32. As shown in FIG. 5C, the curved cavity portions 341 and 342 form a curved conduit 34 and the curved segment surfaces 331 and 332 form a curved guide surface 33 which acts as a guide surface.
    As shown in FIGS. 3A and 4A, the insertion aperture 32 includes an aperture 36 which opens onto the combs 141 and an opening 37 which opens in a direction extending from the distal side to the side basic case the bracket. The curved guide surface 33 approaches the surface of the conduit-forming wall opposite the wall surface closest to the combs 141 between the insertion opening 32 and the distal opening.
    Referring to Figure 5B, the joining surfaces 241 and 251 of the segments 24 and 25 respectively have outer edges 242 and 252 which are welded and thereby form a welded portion 201. The surface of the welded portion 201 is ground.
    As shown in FIGS. 3A and 4A, the light projection glass fiber 21 and the light receiving glass fiber 22 are inserted into the retaining conduit 29. The light projection glass fiber 21 is in the first communication conduit 30 and the light-receiving glass fiber 22 is inserted into the second communication conduit 31. The opening 36 is elongated in the longitudinal direction of the retaining conduit 29 which forms the first and second conduits for fibers.
    The light projecting fiberglass 21 and the light receiving glass fiber 22 are made in accordance with the configurations shown in Figs. 3A and 4A before being inserted into the first and second fiber ducts. The light projection glass fiber 21 includes a base portion 211, a distal straight portion 212, and a curved portion 213 connecting the base portion 211 and the straight portion 212. The light receiving glass fiber 22 includes a base portion 221, a distal straight portion 222 and a curved portion 223 connecting the base portion 221 and the straight portion 222.
    The curved guide surface 33 has a radius of curvature traced along a plane parallel to the joining surfaces 241 and 251 which is smaller than the smallest radius of curvature of the curved portion 223 plotted along the same hypothetical plane.
    Referring to FIG. 5A, the insertion aperture 32 (as can be seen in FIG. 5B) in the direction of passage for the flight 142 has an entry width H1 which is equal to the diameter of the flight fiber. light production glass 21 and the diameter of the light receiving glass fiber 22 -------- In addition -, - the restraining duct 29 in - the direction of the passage for the flight 142 possesses a path width H2 which is equal to the entry width H1 except for the portion opposite to the insertion aperture 32 (i.e. the curved portion located on the side nearest to the woven fabric W). In addition, the first communication duct 30 and the second communication duct 31 have duct diameters that are equal to the duct width H2 of the retaining duct 29. The retaining duct 29 has a duct width H3 in the direction in which the chain wires T extend, which is twice as large as the path width H2.
    As shown in FIG. 4B, a metal coupling 38A for the light projection glass fiber 21 and a metal coupling 38B for the light receiving glass fiber 22 are retained in the large diameter tube 28. The coupling 38A includes a first insertion bore 39 and a second insertion bore 41 which extend in the longitudinal direction of the large diameter tube 28. The coupling 38B includes a first insertion bore 40 and a second insertion bore 42 which extend in the longitudinal direction of the large-diameter tube 28.
    A base portion (terminal portion opposite the passage for the flight 142) of the light projection glass fiber 21 is inserted into the first insertion bore 39 of the coupling 38A. A base portion of the light receiving glass fiber 22 is inserted into the first insertion bore 40 of the coupling 38B. A distal portion (end portion closer to the light projection glass fiber 21) of a plastic light projection fiber 43 is inserted into the second insertion bore. 41 of the coupling 38A. A distal portion (end portion closer to the light receiving glass fiber 22) of a plastic light receiving fiber 44 is inserted into the second insertion bore 42 of the coupling 38B.
    A base end face 215 of the light projection glass fiber 21 and a distal end face 431 of the plastic light projection fiber 43 are coupled to each other in a planar contact. A base end face 225 of the light receiving glass fiber 22 and a distal end face 441 of the plastic light projection fiber 44 are coupled to each other in a planar contact.
    The couplings 38A and 38B are fixed by an adhesive 45 which is used to fill the large-diameter tube 28. In the couplings 38A and 38B, the adhesive fixes the base portion of the light-projection glass fiber 21 , the base portion of the light receiving glass fiber 22, the distal portion of the plastic light projection fiber 43, and the distal portion of the plastic light receiving fiber 44. In addition, in the support housing 20, the adhesive 45 fixes the base portion of the light-projection glass fiber 21 and the base portion of the light-receiving glass fiber 22.
    The light projection fiberglass 21 is a glass multifibre obtained by forming a beam from a plurality of fiber elements. The light receiving fiberglass 22 is a glass multifibre obtained by forming a bundle from a plurality of glass fiber elements 220. The plastic light projection fiber 43 is a multi-fiber plastic material obtained by forming a bundle from a plurality of plastic fiber elements 430.
    The plastic light-receiving fiber 44 is a plastic multifibre obtained by forming a bundle from a plurality of plastic fiber elements 440. The plastic fiber elements 430 and 440 have higher transmission of light, such as acrylic resin polycarbonate.
    The plastic light projection fiber 43 is connected to a light generating unit (e.g. a light emitting diode) which is attached to a stationary portion of a loom. The plastic light receiving fiber 44 is connected to a photoelectric conversion unit which is also attached to a stationary portion of a loom.
    As shown in FIGS. 6A and 6B, the light projection glass fiber 21 has a distal end face 214 (end face closer to the passage for the flight 142) facing the light projecting aperture 303 of the first conduit of FIG. communication 30 (as can be seen in Figure 4A).
    The light receiving glass fiber 22 has a distal end face 224 (end face closer to the passage for the flight 142) facing the light receptacle opening 313 of the second one. ---------------------- communication path 31 (as can be seen in Figure 4A). The light emitted by the light projection unit passes through the plastic light producing fiber 43 and the light projection glass fiber 21 to reach the distal end face 214 of the light producing glass fiber. 21. The light passing through the light projection glass fiber 21 is projected from the distal end face 214 towards the passage for the flight 142.
    As shown in FIG. 6A, the light projection glass fiber 21 forms an X-light projection zone in the passage for the flight 142. In addition, the distal end face 224 of the light-receiving glass fiber 22 is arranged to be oriented toward the X light projection area which is part of the passage for flight 142.
    When the distal portion of the weft yarn Y, which is propelled through the passage for the flight 142, reaches the light projection zone X, the light projected by the light projection fiberglass 21 strikes the distal portion of the wire Y-frame, which reflects light. The light reflected by the distal portion of the weft yarn Y is received by the distal end face 224 of the light receiving glass fiber 22.
    The light receiving glass fiber 22 sends the light, which has been received by the distal end face 224, via the light receiving glass fiber 22 and via the plastic-light-receiving fiber-44, To the photoelectric conversion device. In accordance with the amount of light received, the photoelectric conversion device generates an electrical signal that is sent to a control unit (not shown).
    The control unit uses the electrical signal to determine the moment corresponding to the arrival of the distal end of the weft yarn Y in the light projection zone X. The information concerning the moment corresponding to the arrival of the the distal end of the weft yarn Y, which is recognized in this manner is used for example to adjust the moment corresponding to the ejection and the ejection period of the auxiliary nozzles 13 for the subsequent propulsion of the weft yarn and to control the braking of the weft thread.
    In Figure 3A, there is shown a state in which the shed formed between the warp threads T is the largest. In this state, the upper portion of the insertion opening 32 is disposed in the crowd of the T chain son.
    The glass fibers 21 and 22 are used as optical fibers in the support case 20. Thus, the wear of the glass fibers 21 and 22 caused by the friction with the warp yarns is prevented. The light projection fiber plastic material 43 and the plastic light receiving fiber 44 undergo repeated deformations by the threshing action of the loom. However, the plastic light projection fiber 43 and the plastic light receiving fiber 44 have superior durability over repeated deformations. Thus, the looming action of the loom does not damage the light-plastic-material projection fiber 43 and the plastic light-receiving fiber 44.
    The methods of forming the support housing 20 and inserting the light projection glass fiber 21 and the light receiving glass fiber 22 into the support housing 20 will now be discussed.
    Referring to Fig. 7A, an adhesive (not shown) is applied to the joining surfaces 241 and 251 of the separate segments 24 and 25. Referring to Fig. 7B, the joining surface 241 and 251 are then joined together. to one another, so that the adhesive temporarily bonds the segments 24 and 25.
    Referring to FIG. 7C, after the solidification of the adhesive, the outer edges 242 and 252 of the joining surfaces 241 and 251 in the temporarily bonded segments 24 and 25 undergo laser beam welding to obtain the welded portion. 201. The support housing 20 is thus obtained.
    As shown by the dotted lines in FIG. 7D, the light-producing glass fiber 21 is inserted into the insertion opening 32 through the opening 36. Then, as represented by the solid lines in FIG. 7D, the distal end of the light projection glass fiber 21 is inserted into the first communication conduit 30. In this state, the distal end of the light projection glass fiber 21 protrudes out of the first conduit communication portion 30 through the light projection opening 303. The right-hand portion 212 of the light-projection glass fiber 21 is inserted into the first communication conduit 30 of the first fiber conduit, and the curved portion 213 of the light-projection glass fiber 21 is inserted into the curved duct 34 of the retaining duct 29. The base portion 211 of the light-projection glass fiber 21 is inserted into the CONDUCT BEHAVIOR rectilinear 35 of the retaining conduit 29.
    After inserting the light receiving fiberglass 22 into the insertion opening 32 from the opening 36 as shown by the solid lines in FIG. 7D, the distal end of the light receiving glass fiber 22 is inserted into the second communication conduit 31 as indicated by the solid lines in Figure 7D. The straight portion 222 of the light receiving glass fiber 22 is inserted into the second communication conduit 31 while maintaining the curved portion 223, on the distal side of the light receiving glass fiber 22, in contact with the curved guide surface 33. The distal end of the light receiving glass fiber 22 is inserted into the second communication conduit 31 until it projects out of the receiving aperture light 313 (as shown in FIG. 7C). The straight portion 222 of the light-receiving glass fiber 22 is inserted into the second communication duct 31, and the curved portion 223 of the light-receiving glass fiber 22 is inserted into the curved duct 34 the second conduit for fiber. The base portion 221 of the light-receiving glass fiber 22 is inserted into the rectilinear duct 35 of the duct. Retention 29.
    After inserting the light receiving fiberglass 22 into the second communication conduit 31, the retaining conduit 29 is filled with an adhesive 47 (as can be seen in FIG. 7F). For example, it is preferable to use an epoxy resin as adhesive agents 45 and 47.
    After the solidification of the adhesive 47, the surface of the support case 20 is subjected to grinding. The welded portion 201, the distal end of the light projection glass fiber 21, and the distal end of the light receiving glass fiber 22 are also grinded. Accordingly, the distal end face 214 of the light projection glass fiber 21 and the distal end face 224 of the light receiving glass fiber 22 are formed to have a curved surface.
    When grinding the opening flanges 361 and 362 (as can be seen in FIG. 5A) forming the opening 36 of the insertion opening 32, the outer surface 471 (as can be seen in FIG. 5A) of the adhesive 47 which escapes from the opening 36 by spreading is also subjected to grinding.
    The first embodiment has the advantages as described below.
    (1) The opening 36, which is part of the insertion opening 32, opens on the combs 141. In addition, the opening 36 extends along the longitudinal direction of the retaining conduit 29 which is part of the fiber duct. The opening 36 has a configuration which facilitates the insertion of the light projection glass fiber 21 into the first fiber conduit between the two segments 24 and 25 which are welded and joined. to one another. After inserting the light projection fiberglass 21 into the first communication conduit 30, the light receiving glass fiber 22 is inserted into the second communication conduit 31. The rear side of the insertion opening 32 or the portion of the insertion aperture 32 facing the combs 141 is used to at least insert the light receiving glass fiber 22 into the second communication conduit 31. The insertion opening 32 facilitates the insertion of the light receiving glass fiber 22 into the second fiber conduit between the two welded and seamed segments 24 and 25. Accordingly, the optical fiber can be inserted after joining metal segments 24 and 25 to form the support case 20 by welding. Thus, the heat generated during the welding of the segments 24 and 25 does not reduce the light transmission capacity exhibited by the optical fibers.
    (2) The curved guide surface 33 guides the curved portion 223 of the light receiving glass fiber 22 when the straight portion 222 of the light receiving glass fiber 22 has been inserted into the second communication conduit 31. The curved guide surface 33 facilitates insertion of the light receiving glass fiber 22 into the second communication conduit 31 which is part of the second fiber conduit.
    (3) The radius of curvature of the curved guide surface 33 along a hypothetical plane parallel to the junction surfaces-241 and 251 is less than ------ --------- small radius of curvature of the curved portion 223 along the hypothetical plane. Thus, during the insertion of the light-receiving glass fiber 22 into the second communication duct 31, a free space is obtained between the curved guiding surface 33 and the curved portion 223 of the glass receiving fiber. 22. Such a free space facilitates the insertion of the light-receiving glass fiber 22 into the second communication conduit 31.
    (4) The structure in which the width H1 of the insertion opening 32 in the direction of the passage for the flight 142 is equal to the diameter of the optical fiber facilitates the insertion of the light projection glass fiber 21 and the light receiving glass fiber 22 in the retaining pipe 29.
    (5) The first right communication duct 30, which has a duct diameter which is equal to the diameter of the light projection glass fiber 21, increases the directivity of the light projection glass fiber 21 and improves the accuracy of the detection of the weft thread. In the same way, the second straight communication duct 31, the diameter of which is equal to the diameter of the light-receiving glass fiber 22, increases the directivity of the light-receiving glass fiber 22 and improves the accuracy of the light-receiving glass fiber 22. detection of the weft thread.
    (6) Before welding, the two segments 24 and 25 are temporarily bonded to each other with the adhesive. By temporarily gluing in advance the two segments 24 and 25 with-1 -'-- adhered s-if, it facilitates the welding mi implements ------------ --- thereafter.
    (7) The detection accuracy of the weft yarn increases as the distal end faces of the light projection glass fiber 21 and the light receiving glass fiber 22 are more planar. The distal end faces of the light-projection glass fiber 21 and the light-receiving glass fiber 22 are ground to obtain curved surfaces. Thus, in the glass fibers 21 and 22 having a multifiber glass type structure respectively forming beams with the glass fiber elements 210 and 220, the distal end face of each of the fiberglass members 210 and 220 is almost flat. Thus, the detection accuracy of the weft yarn is increased.
    (8) The light projection glass fiber 21 and the light receiving glass fiber 22 are reciprocally aligned in the direction in which the T chain wires extend. In addition, the retaining pipe 29 has a cross-sectional configuration which is elongated in the direction in which the T-warp yarns extend. Thus, the light-projection glass fiber 21 can be inserted into the first communication duct 30, even in the same direction. lack of insertion opening 32. However, once the light projection fiberglass 21 has been inserted into the first fiber conduit, the marginal space disappears. Thus, the light-receiving fiberglass 22 can not be inserted into the retaining conduit 29 through the opening 37 of the insertion opening --- 32 ---------- The opening ------ insertion 32 which ------------------ the opening 36 opens towards the combs 141 is preferable for application to the structure wherein the light-projection glass fiber 21 and the light-receiving glass fiber 22 are arranged in reciprocal alignment in the direction in which the T-warp wires extend.
    (9) The support housing 20 has a cylindrical distal portion which includes the first communication conduit 30 and the second communication conduit 31 and a base portion which is located at the base of the distal portion and which encompasses the straight conduit 35 and the insertion opening 32 which opens into the side of the support housing 20 facing the combs 141. The free space formed between the warp threads T by the cylindrical distal portion is greater than the width H1 (as it can be seen in FIG. 5A) of the insertion opening 32. Thus, the edges of the insertion opening 32 do not come into contact with the T-warp yarns. In addition, the distal ends of the light-projection glass fiber 21 and the light-receiving glass fiber 22 have a curvature, with respect to the straight duct 35, towards the combs 141. Thus, being given that insertion opening 32 opens in the side of the support housing 20 facing the combs 141, an even more uniform insertion of the light projection glass fiber 21 and the light receiving glass fiber 22 into the conduit for fiber of the support housing 20.
    The present invention may take several embodiments as follows.
    As shown in FIG. 8, the opening flanges 361A and 362A that form the opening 36 of the insertion opening 32 may be chamfered (rounded). Thus, friction is prevented with the opening flanges 361A and 362A which would cause the T-warp yarns to be cut. In addition, by spacing the outer surface 471 of the adhesive 47 from the opening flanges 361 and 362. 362, it is no longer necessary to grind the outer surface 471 of the adhesive 47.
    Instead of the curved guide surface 33, as shown in FIG. 9, an inclined surface 48 which is straight when viewed along a hypothetical plane extending along the joining surfaces 241 and 251 (FIG. as can be seen in Figure 5A) segments 24 and 25.
    As shown in FIG. 10, it is possible to adjust the length of the opening 36 in the longitudinal direction of the fiber duct so that the insertion opening 32 is located outside the shed formed between the threads of the thread. chain T, where the crowd is the largest. Thus the contact of the opening flanges 361 and 362 (as can be seen in FIG. 5A) is avoided with the warp threads T and a deterioration of the warp threads T which may occur as a result of the friction of the flanges of opening 361 and 362 with the warp yarns T.
    The opening width H1 of the insertion opening 32 in the direction of passage for the flight 142 may be greater than the diameter of the optical fiber. Thus, it is possible to obtain even more regular insertion of the optical fibers in the retaining conduit 29.
    It is possible to envisage a weld only at the external edges 242 and 252 at the distal portion 23 of the support case 20.
    The outer edges 242 and 252 of the segments 24 and 25 may be welded to each other in the absence of temporary bonding and segments 24 and 25 with the adhesive.
    The light projection glass fiber 21 and the light receiving glass fiber 22 may respectively represent a single optical fiber filament.
    The light projection fiberglass 21 and the light receiving glass fiber 22 may be arranged separately in discrete and adjacent support members.
    The insertion opening 32 may be open in the side of the support housing 20 turned towards the W1 or in both sides facing the combs 141 and the W1 cut.
    The support case 20 may be made in one piece by molding or the like. Even in such a case, as long as the support housing 20 includes the insertion opening 32, optical fibers can be inserted into the molded support housing 20.
    Thus, a reduction in the light transmittance capability of the optical fibers is prevented, whether by heat, deformation or the like.
    权利要求:
    Claims (7)
    [1]
    A weft yarn sensor for a jet-type loom, including a comb (141) which mounts a weft yarn (Y) which has been propelled by an ejected fluid into a shed formed between two rows of yarns chain (T) and a leaf (11) which holds the comb (141), the weft detector comprising: a support housing (20) which includes a conduit for the fibers (29, 30, 31) and which is arranged on the leaf (11), the support casing (11) moving towards and away from the shed via a free space formed between warp threads (T) of which one of the two rows of warp threads (T), and the support case (20) having a first side surface facing the comb (141) and a second side surface facing the first side surface and towards a face (W1); and an optical fiber (21, 22, 43, 44) which represents at least either a light projection optical fiber (21, 43) or a light receiving optical fiber (22, 44) arranged in the conduit for fiber (29, 30, 31) facing a passage for the flight (142) of a weft yarn (Y) formed by the comb (141); characterized in that the fiber conduit (29, 30, 31) includes a distal opening (303, 313 ) located on the distal side of the support housing (20) facing the flight passage (142), an insertion opening (32) located in the base of the support housing (20) and used for insertion of the optical fiber (21, 22, 43, 44), and a curved conduit (34) extending between the insertion opening (32) and the distal opening (303, 313), the opening insertion device (32) opening in at least one of the first lateral surface and a second lateral surface.
    [2]
    A weft yarn sensor according to claim 1, characterized by: a duct forming wall forming the curved duct (34) and including a first wall surface closer to the comb (141) and a second facing wall surface; the first wall surface, the first wall surface including a guide surface (33) curved towards the comb (141), and the guide surface (33) approaching the second wall surface from the insertion opening (32) towards the distal opening (330, 313) at least to a mid-way position before reaching the distal end.
    [3]
    A weft yarn sensor according to claim 1 or 2, characterized in that the insertion aperture (32) has an opening width (H1) in a direction in which the passage for flight extends ( 142), and the optical fiber (21, 22, 43, 44) has a diameter which is equal to the width of the opening (H1).
    [4]
    A weft yarn sensor according to any one of claims 1 to 3, characterized in that the fiber conduit (29 , 30, 31) includes a communication conduit (30, 31) which is continuous at the distal opening (303, 313), the communication conduit (30, 31) being a rectilinear conduit.
    [5]
    Weft yarn sensor according to one of Claims 1 to 4, characterized in that the support housing (20) includes a retaining duct (29), a first communication duct (30) in communication with the retaining duct (29) and a second communication duct (31) in communication with the retaining duct (29), the light-projection optical fiber (21, 43) and the light receiving optical fiber (22, 44). ) being held in parallel in the retaining duct (29), the light-projection optical fiber (21, 43) being inserted into the first communication duct (30), the light-receiving optical fiber (22, 44) being inserted in the second communication duct (31), the first communication duct (30) and the second communication duct (31) being arranged in alignment in the oscillation direction of the comb (141), and the opening of insertion (32) is formed in the retaining conduit (29 ).
    [6]
    The weft yarn sensor according to claim 5, characterized in that the first communication duct (30) includes a light projection aperture (303) facing the flight passage (142), the second communication duct (31) includes a light receiving aperture (313) facing the flight path (142), and the light projecting aperture (303) is spaced from the light receiving aperture (313).
    [7]
    Weft yarn sensor according to one of Claims 1 to 6, characterized in that the optical fiber (21, 22, 43, 44) is obtained by forming a bundle from a plurality of fibrous elements (210, 220).
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    同族专利:
    公开号 | 公开日
    JP2011047078A|2011-03-10|
    CN102002799A|2011-04-06|
    CN102002799B|2012-03-21|
    JP5218340B2|2013-06-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0204093A1|1985-04-05|1986-12-10|Kabushiki Kaisha Toyoda Jidoshokki Seisakusho|A method and an apparatus for detecting the weft yarn in a jet loom|
    JPS61252344A|1985-04-25|1986-11-10|Toyoda Automatic Loom Works|Weft yarn detector in jet loom|
    JPH0571046A|1991-06-01|1993-03-23|Toyota Autom Loom Works Ltd|Weft yarn sensor in fluid jetting type loom|BE1023209B1|2014-08-04|2016-12-21|Kabushiki Kaisha Toyota Jidoshokki|Device for detecting a weft yarn in a jet-type loom|DE3268297D1|1981-09-25|1986-02-13|Nissan Motor|Optical weft sensor for a loom|
    JP2649468B2|1992-12-28|1997-09-03|一吉 木田|Weft detector|
    SE510657C2|1997-11-24|1999-06-14|Eltex Sweden Ab|Monitoring device|
    JP2003149504A|2001-11-14|2003-05-21|Auto Network Gijutsu Kenkyusho:Kk|Optical connector|
    JP2006328591A|2005-05-26|2006-12-07|Toyota Industries Corp|Apparatus for detecting weft in jet loom|CN102346251A|2011-11-01|2012-02-08|江苏万工科技集团有限公司|Weft yarn floatation characteristic measurement device|
    JP5999136B2|2014-05-13|2016-09-28|株式会社豊田自動織機|Weft detection device in air jet loom|
    JP6367784B2|2015-03-27|2018-08-01|株式会社豊田自動織機|Weft detection device for air jet loom|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2009196814|2009-08-27|
    JP2009196814A|JP5218340B2|2009-08-27|2009-08-27|Weft detection device in jet loom|
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