Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
  • D01H1/14—Details
  • D01H1/40—Arrangements for connecting continuously-delivered material to bobbins or the like
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H65/00—Securing material to cores or formers
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
  • D01H1/14—Details
  • D01H1/38—Arrangements for winding reserve lengths of yarn on take-up packages or spindles, e.g. transfer tails
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H7/00—Spinning or twisting arrangements
  • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
  • D01H7/04—Spindles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2701/00—Handled material; Storage means
  • B65H2701/30—Handled filamentary material
  • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

• the invention relates to a clamping device for threads on a spindle of a spinning or twisting machine according to the preamble of claim 1.
• a clamping device which has a fixedly mounted on a whorl of a spindle clamping element and an axially displaceable to the longitudinal axis of the spindle clamping element.
• the clamping elements are pressed against each other by a compression spring, which is supported on the displaceable clamping element and the whorl, so that forms a clamping gap between the clamping elements.
• the displaceable clamping element In order to open the nip by the displacement of the displaceable clamping element against the force of the compression spring, the displaceable clamping element has an inwardly inclined conical annular surface which defines an annular chamber with the fixed clamping element, in which movable centrifugal elements are arranged.
• the force applied by the centrifugal bodies on the displaceable clamping element force is greater than the spring force, which leads to a movement of the displaceable clamping element in the axial direction and thereby to open the nip.
• the clamping device moves into its clamping position.
• the clamping position in which the end faces of the two clamping elements are pressed against each other, engages a arranged on the end face of the displaceable clamping element shoulder in a corresponding annular groove on the end face of the fixed clamping element to isolate the annular chamber relative to the clamping gap.
• a disadvantage of this clamping device proves that it can come despite the shoulder to penetration of thread residues in the annular chamber. This is facilitated by the fact that the annular groove is formed as an undercut, in which can be pulled to be clamped thread residues, fiber material or the like.
• the invention is based on the object to further develop the clamping device so that a largely uninterrupted continuous operation of the clamping device is ensured.
• the inventive construction of the clamping device provides that the receptacles for the centrifugal elements on the opposite side of the clamping gap of the clamping device are arranged, wherein between the receptacles and the nip a compression spring is arranged. Due to the spatial spacing of the arrangement and guidance of the centrifugal serving recordings from the nip, the susceptibility to fouling of the clamping device according to the invention is reduced. The penetration of thread remnants, fiber material or the like via the nip in the shots of the centrifugal elements is largely avoided in this way, whereby the occurrence of blockages of the centrifugal elements is prevented by penetrating into the guides thread remnants or the like.
• the spaced apart from the nip positioning of the centrifugal elements allows the use of the clamping device for rings with smaller ring diameter, which surround the spindle top concentric and on which a rotor rotates, which deflects the thread to the sleeve.
• the receptacles may be formed as two mutually corresponding, extending in the radial direction shells, which enclose the centrifugal elements.
• This has the advantage that the centrifugal elements are forcibly guided due to the positive connection.
• the leadership of the centrifugal elements takes place in channels, which are arranged on the underside of the fixed clamping element and thus allow a relatively large game, are located by the positive control according to the invention all centrifugal bodies always on a lane with the same center distance, whereby imbalances can be avoided.
• centrifugal elements are guided virtually free of play in any position within the receptacles and exert the same axial forces on the displaceable clamping element, whereby tilting of the clamping element is prevented.
• the closed version of the recordings also prevents this Penetration of thread residues or the like, whereby the risk of impairment of functionality is further reduced.
• the receptacles can be distributed uniformly over the circumference of the clamping device.
• This arrangement of the recordings causes a largely tilt-free guidance of the displaceable clamping element on the spindle upper part.
• the images can be arranged offset at an angle less than or equal to 180 °, in particular at an angle of 90 ° or 60 ° to each other. This allows the arrangement of two or more distributed over the circumference of the clamping device centrifugal elements.
• a half-shell can be arranged on the displaceable clamping element and the respective corresponding half-shell on a fixed base element.
• the base element is supported on a spindle arranged at the top of the drive whirlpool and serves the sliding clamping element as an abutment.
• the backdrop-like guidance of the centrifugal elements can be formed in the half-shells of the base element or the displaceable clamping element with an inclined to the horizontal backdrop and the corresponding half-shells with a horizontal substantially parallel backdrop, the scenes serve the leadership of the centrifugal elements.
• the scenes of the half-shells with the horizontal substantially parallel scenes cause that the centrifugal elements can move in these shells substantially in the radial direction outwards, while the centrifugal force elements move the displaceable clamping element in the axial direction by the inclination of the scenes of the corresponding half-shell to to open the nip.
• the inclination of the scenes in the displaceable clamping element between 10 ° and 70 °, in particular between 15 ° and 65 °. This allows the selection of the spring force which presses the two clamping elements in the clamping position of the clamping device against each other, since depending on the design of the inclination of the scenes, the opposing force varies.
• the displaceable clamping element with its half-shells can be guided in grooves arranged on the outer circumference of the base element.
• the grooves simplify assembly during the supply of the displaceable clamping element and ensure the mutually corresponding arrangement of the half shells to each other, so that the centrifugal elements are almost completely enclosed by the half-shells.
• a rotation of the displaceable clamping element relative to the base element is prevented by the grooves.
• the clamping elements may have complementary webs and recesses on their mutually facing end surfaces. In this way, the clamping effect can be increased by a more acute clamping angle between the webs and recesses and the increase of the yarn contact surface between the webs and recesses.
• the lateral surfaces of the clamping elements in the region of the clamping gap may be at least partially conical.
• the supply of the thread is simplified if it is not inserted directly into the nip, but rests against the lateral surface of one of the clamping elements.
• the conicity of the lateral surface causes the thread can slip into the nip due to the thread tension, to ensure during braking of the spindle that the thread is over its supplied length in the nip.
• Fig. 1 is a partial perspective view of a spindle top part
• FIG. 2 is a sectional view of a clamping device according to the invention in its clamping position.
• Fig. 3 is a sectional view of the clamping device in the open
• Fig. 4 is a perspective view of a base element.
• Fig. 1 shows a spindle upper part 1 of a spindle of a textile machine, in particular a spinning and twisting spindle.
• the spindle upper part 1 has a shaft made of metal, which serves to receive a sleeve, not shown, on which a thread is to be wound into a cop.
• an unillustrated spinning ring is arranged on the spindle upper part 1, which concentrically surrounds the spindle upper part 1 and on which a rotor rotates, which deflects the yarn to the sleeve and winds on this.
• a drive whorl 2 is arranged, via which the spindle upper part 1 can be driven during operation of the textile machine.
• the drive whorl 2 has a thread 3, which serves to fasten a clamping device 4 according to the invention for clamping the thread when Doffen the cop manufactured.
• the clamping device 4 is centrifugally operated and can take two positions, a clamping position in which the thread is clamped, and an open position in which the thread can be supplied or released and thrown off.
• Fig. 2 illustrates the clamping device 4 according to the invention in its clamping position, while in Fig. 3, the clamping device 4 is shown in the open position. In the clamping position, the end faces of two clamping elements 5, 6 are pressed against each other, while in the open position, a clamping gap 16 between the two clamping elements 5, 6 is formed.
• the clamping device 4 is designed in several parts and comprises a fixed clamping element 5 and an axially displaceable, against the fixed clamping element 5 anpressbares clamping element 6 and a base member 7, which is supported in the mounted position of the clamping device 4 on a flange-shaped shoulder 10 of the Antriebswirteis 2 to the Clamping device 4 to fix in the axial direction.
• the clamping device 4 comprises a compression spring 8 and a plurality of centrifugal force elements 9, which in particular are designed as balls and which are arranged at an angle offset from each other over the circumference of the spindle upper part 1 uniformly distributed in the clamping device 4.
• the clamping elements 5, 6 have at their mutually facing end faces complementary webs and recesses, which engage in the clamping position of the clamping device 4 in one another to exert a greater clamping action on the thread in the nip 16 thread.
• the lateral surfaces 17, 18 of the clamping elements 5, 6 are formed in sections conical.
• the substantially cylindrical base element 7 has a coaxial to the longitudinal axis of the spindle top 1 wall 11, which is provided with a number of centrifugal elements 9 corresponding number of through holes 12.
• half shells 13 are arranged, which, as shown in Fig. 4, starting from the through holes 12 extending radially to the longitudinal axis of the spindle upper part 1 to the outside.
• the half shells 13 close to the through holes 12 in the axial direction.
• the displaceable clamping element 6 has half shells 13 which correspond to the half shells and extend in the radial direction.
• the half-shells 13, 15 serving to receive the centrifugal force elements 9 are designed in accordance with the shape of the spherical centrifugal force elements 9 and adapted to their dimensions.
• the wall 11 in the axial direction of the spindle upper part 1 extending grooves 14, which are arranged adjacent to the half-shells 13 on the wall 11.
• the grooves 14 serve to position and the rotation of the displaceable clamping element 6.
• the grooves 14 of the base member 7 a width of the half-shells 15 corresponding width, so that the half-shells 15 are guided in this.
• the Kle ⁇ tmelement 6 is positioned and guided by the grooves 14 in such a manner relative to the base element 7, that in mounted on the spindle upper part 1 position of the clamping device 4 the
• Centrifugal elements 9 are enclosed by the half-shells 13, 15 and sealed to the outside by the two corresponding half-shells 13, 15 in mounted on the spindle upper part 1 position of the clamping device 4 form a closed chamber. In this way, a guidance of the centrifugal elements 9 is achieved and the centrifugal elements 9 are protected from contamination by thread residues, fiber material or the like.
• the leadership of the centrifugal elements 9 is achieved by a backdrop-like leadership.
• the angle of the inclined backdrop is preferably between 10 ° and 70 °, in particular 15 ° to 65 °.
• the compression spring 8 is supported on the base element 7 and on which the base element 7 surrounding displaceable clamping element 6 and pushes it in the direction of the fixed clamping element 5.
• the transition between the clamping position and the open position of the clamping device 4 takes place at a lower or exceeded a Limit speed in spinning operation.
• the limit speed corresponds to the speed of the spindle upper part 1, in which the force exerted by the centrifugal force elements 9 on the displaceable clamping element 6, acting in the axial direction is lower than the force acting by friction and the compression spring 8 on the clamping elements 5, 6 force.
• a ring rail not shown, is guided so far down that the guided by the rotating on the spinning ring rotor runner is placed in the region of the opened nip 16. It is not necessary to wind the thread with a full turn around the clamping device 4.
• 6 slides the thread due to the taper and the thread tension in the Kle ⁇ unspalt 16 and the thread is placed directly in the nip 16.
• the undershooting of the limit speed by the following deceleration operation leads to a reduction of the centrifugal force, so that the centrifugal elements 9 move inwardly and finally abut against the surface of the Antriebswirteis 2 at standstill of the spindle, as shown in Fig. 2, whereby no sufficient, the Compression spring 8 opposing force is applied to the displaceable clamping element 6.
• the spring force presses the displaceable clamping element 6 against the fixed clamping element 5, whereby the clamping gap 16 is closed.
• the mutually complementary webs and recesses on the end faces of the clamping elements 5, 6 engage with each other and clamp the yarn located in the nip 16.
• the subsequent Doffen the sleeve causes the severing of the thread.
• the webs which are for example trapezoidal or formed as a serration, executed sharp-edged, whereby the cutting of the thread is simplified.
• the clamping gap 16 is opened again when the limiting rotational speed is exceeded, which leads to the spin-off of the thread remnant therein, which until then has remained in the clamping gap 16.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Spinning Or Twisting Of Yarns (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=38174491

Family Applications (1)

Country Status (5)

Cited By (5)

Families Citing this family (7)

Citations (4)

Family Cites Families (7)

• 2006
  • 2006-05-13 DE DE102006022484.1A patent/DE102006022484B4/de active Active
• 2007
  • 2007-02-28 EP EP07722954A patent/EP2024265B1/de active Active
  • 2007-02-28 WO PCT/EP2007/001701 patent/WO2007131562A1/de not_active Ceased
  • 2007-02-28 DE DE502007003750T patent/DE502007003750D1/de active Active
  • 2007-02-28 CN CN2007800164141A patent/CN101437741B/zh active Active
  • 2007-02-28 JP JP2009510296A patent/JP2009536989A/ja active Pending

Patent Citations (4)

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