Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
  • D01G19/00—Combing machines
  • D01G19/06—Details
  • D01G19/14—Drawing-off and delivery apparatus
  • D01G19/16—Nipper mechanisms
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T74/00—Machine element or mechanism
  • Y10T74/18—Mechanical movements
  • Y10T74/18856—Oscillating to oscillating
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T74/00—Machine element or mechanism
  • Y10T74/18—Mechanical movements
  • Y10T74/18888—Reciprocating to or from oscillating
  • Y10T74/1892—Lever and slide
  • Y10T74/18952—Lever and slide toggle transmissions

Definitions

• the present invention relates to a wrap-holding mechanism for a wrapping machine that forms a thin group of fibers called fleece by removing short fibers from a group of fibers called wrap when producing cotton yarn.
• the present invention relates to swing control of a nipper frame having a cushion plate used for gripping the wrap in a wrap gripping mechanism.
• the average fiber length of cotton varies depending on the place of origin and the variety, and the average fiber length of the same variety is not uniform and uneven.
• it is necessary to remove cotton short fibers (including contaminants such as NEP) to increase the yarn strength and improve the appearance of the yarn. It is effective.
• the comber includes a combing cylinder, a top comb, a pair of detaching rollers, and a nipper device.
• the brim device swings back and forth while holding a sheet-like fiber group called a supplied wrap.
• the combing cylinder has a row of needles (cylindrical needles) implanted on the outer peripheral surface (cylindrical half wrap), and when the futaba device retreats, the row of needles combs the tip of the wrap. This operation is called comming.
• the comb removes the short fibers from the wrap, and the wrap becomes a group of thin sheet-like fibers called fleece.
• the fleece moves toward the detaching roller by the advance of the nipper device.
• the detaching roller reverses in response to the advance of the fleece, retreats the fleece (leading fleece) drawn out from between the rollers, and moves the rear end of the leading fleece and the newly carded fleece. (Following fleece).
• the detachable grinder rotates forward again, and pulls out the subsequent fleece joined to the preceding fleece in the forward direction. This operation is called piecing.
• the top comb combs the trailing edge of the subsequent release. In Komae, By repeating such an operation, cotton short fibers are effectively removed from the wrap.
• the nipper device includes a nipper frame, a cushion plate fixed to the tip thereof, and a two-knife for gripping the lap in cooperation with the cushion plate.
• Two Tsubanaifu is, to grip the wrapping at the tip of the click Tsu cane Npure door (Nippafu frame is, and the most retracted position the tip of the click Ssho Npure door is close to the Siri Ndani dollars, and the most advanced position in close proximity to the deterministic Tsuchingurora It swings between the spaces.
• the swinging method of the nipper frame in the frame can be roughly classified into the following three types according to the trajectory drawn by the tip of the cushion plate.
• Type 1 The nipper frame is swingably supported by a swing mechanism provided above it.
• the tip of the cushion plate has an arc-shaped trajectory projecting downward due to the movement of the nipper frame, that is, a circle drawn by the tip of the needle as the combing cylinder is driven. (Referred to as a circle).
• Type 2 The nipper frame is swingably supported by a four-bar link mechanism that uses a nipper shaft provided below it as a drive shaft and uses it as a fixed point of the link.
• the tip of the cushion plate moves along an arc-shaped trajectory (that is, a trajectory where the cylinder circle becomes an inscribed circle) protruding upward due to the swing of the nipper frame.
• Type 3 The nipper frame is designed such that the tip of the cushion plate moves along a substantially linear horizontal trajectory (that is, a trajectory that is tangent to the cylinder circle) by its swing. .
• the type 1 device when the tip of the cushion plate moves, the section where the tip approaches the cylinder circle is shortened, making it difficult to perform sufficient communication.
• the type 2 device has a longer combing action than the type 1 device because the section where the tip of the cushion plate approaches the cylinder circle is longer.
• the tip of the cushion plate moves to the most advanced position, the tip becomes lower than the position where the pair of upper and lower data cutting rollers grips the subsequent flies. Obedience Therefore, at the time of piecing, the tip of the following fleece is easily bent, which may hinder smooth piecing.
• the type 2 device has a larger swing stroke of the two-frame than the type 1 device, and tends to generate vibration when the machine base is operated at high speed.
• Type 3 devices are a compromise of type 1 and 2 devices, but this design resulted in inadequate combing and piecing action. Also, since the tip of the cushion plate approaches the needle just above the cylinder circle, the swing stroke of the nipper frame is inevitably large.
• Japanese Patent Laid-Open No. 54-92626 discloses an automatic control method for a nipper frame as described below.
• the tip of the cushion plate swings due to the swinging of the nipper frame
• the tip cooperates with the nipper knife to grip the wrap and release the wrap.
• Futaba open / close position exists in the entire section.
• the section from the flange opening / closing position to the last retreat position is defined as a rear section
• the section from the nipper opening / closing position to the most advanced position is defined as a front section.
• the tip of the cushion plate moves along an arc-shaped trajectory that protrudes upward near the cylinder circle.
• the tip of the cushion plate moves along a diagonally upward trajectory continuing from the front end of the trajectory in the following section.
• this method uses a four-bar link mechanism consisting of an automatic lever 31, a nipper frame 32, and a driven link 33.
• the swing motion of 32 is performed, and the swing fulcrum 34 of the driven link 33 that supports the front part of the two-piece frame 32 is displaced during the swing motion. Therefore, the driven link 33 has a two-stage configuration including the first link 35 and the second link 36.
• the second link 36 which is the base end side of the driven link 33, is in contact with the stopper 38 by the action of the spring 37.
• the first link 35 which is the tip side of the driven link 33, turns around the second link 36 and the support shaft 36a. It is possible to move.
• the first and second links 35 and 36 rotate integrally about the support shaft 36a. Due to this rotation, the tip of the cushion plate 40 is moved forward (in the form of an arc that protrudes upward) from the front end of the trajectory, and the position where the data latch 39 grips the subsequent fleece (hereinafter referred to as the nip position). ) Move along a diagonally upward trajectory connecting with.
• the second link 36 supporting the nipper frame 32 repeatedly contacts with the stopper 38 and separates from the stopper 38 as the upper frame 32 swings. 2
• the link 36 and the storage collar 38 are worn out, and noise and vibration are generated by the contact. These noises and vibrations become more remarkable with the high-speed operation of the machine.
• the nipper frame 32 does not swing along a predetermined trajectory.
• the Japanese Patent Application Laid-Open No. 54-113133 when the tip of the cushion plate is located in the rear section due to the swing of the two-piece frame, the Japanese Patent Application Laid-Open No. — Reciprocates along the same trajectory as in 6 9 26. Then, in the previous section, the tip of the cushion plate is turned obliquely upward from the opening / closing point of the nipper to the most advanced position and then advanced, and then turned horizontally or diagonally downward toward the nip position. It moves along a predetermined trajectory approaching, retreating diagonally downward from the most advanced position to the double opening / closing point, and returning.
• the two-piece device according to this method is composed of a swing lever ⁇ —31, a nipper frame 32, a driven link 43, and a swing arm 44. It has a four-bar link mechanism.
• the driven link 43 has a first end (upper end) connected to the front of the nipper frame 32, and a second end (lower end) connected to the swing arm 44.
• the swing arm 44 swings up and down via a cam 46 fixed to the cylinder shaft 45. Then, with the swing of the swing arm 44, the swing fulcrum 43a of the driven link 43 is displaced up and down, and the tip of the cushion plate 40 swings along the predetermined locus. Move.
• this flap device not only requires lubrication for maintenance, but also easily causes fly waste to enter between the cam 46 and the cam ball 47 of the swing arm 44. This incorporation of fly waste prevents the nipper frame 32 from swinging along a predetermined trajectory.
• the cam 46 since the cam 46 is used, troubles due to the trouble of adjusting the cam 46 and loosening of the screws are liable to occur. Disclosure of the invention
• An object of the present invention is to provide a comb wrap gripping mechanism that can achieve a high-speed machine base without using a cam mechanism, generating no noise, vibration, and foreign matter such as fly waste. It is in.
• an improved wrap gripping mechanism for a comma includes a pair of data rollers, a combing cylinder that combs the provided wrap to form a subsequent fleece, and a top comb that combs the rear end of the subsequent fleece. Have. When the preceding fleece held by the pair of detaching rollers is conveyed forward, the succeeding fleece is joined to the preceding fleece.
• the gripping mechanism according to the present invention includes a nipper frame disposed above the comming cylinder so as to swing back and forth. A cushion plate is attached to the tip of the nipper frame.
• the cushion plate grips the wrap in cooperation with the two flange members according to the swing of the nipper frame.
• the tip of the drive arm is rotatably connected to the rear end of the nipper frame.
• the base end of the drive arm is fixed to a forward / reverse rotatable nipper shaft disposed behind the combing cylinder and below the nipper frame.
• Two fixed fulcrums are arranged above and below the two-piece frame, respectively.
• a four-joint link mechanism having two movable fulcrums having a driven link as a joint is provided between the two fixed fulcrums.
• the upper fixed fulcrum is located behind the lower fixed fulcrum, and the front part of the nipper frame is rotatably connected to the driven link. Then, the nipper frame swings by cooperation of the two shaft shaft, the drive arm and the four-bar linkage.
• the swing of the nipper frame causes the tip of the cushion plate to move At a position close to the cylinder, it moves along an arc-shaped trajectory that protrudes upward. Therefore, the tip of the cushion plate moves while maintaining a constant distance from the cylinder circle, so that the lap is subjected to a combing action for a longer time, and effective coaming becomes possible.
• the tip of the cushion plate moves along the arc-shaped locus that protrudes downward from a position close to the combing cylinder to the most advanced position, the tip of the cushion plate is gripped by the detaching roller. Placed at height. Therefore, the leading fleece does not bend at the time of joining the leading fleece and the trailing fleece, and good piercing is enabled.
• FIG. 1 is a side view showing a state in which a two-piece frame is located at a most advanced position by a wrap gripping mechanism according to the present invention.
• FIG. 2 is a side view showing a state in which the two-piece frame is located at the rearmost position.
• FIG. 3 is an operation explanatory view of the nipper frame swinging device.
• FIG. 4 is a schematic diagram showing the swing fulcrum of the driven link and the swing locus of the tip of the flange.
• FIG. 5 is a side view showing a state in which the conventional nipper frame is disposed at the rearmost position.
• FIG. 6 is a side view showing a state where the two-piece frame of FIG. 5 is arranged at a most advanced position.
• FIG. 7 is a side view showing a state in which another conventional two-pper frame is disposed at a rearmost position.
• FIG. 8 is a side view showing a state where the nipper frame of FIG. 7 is arranged at a most advanced position.
• a pair of detaching rollers 2 are arranged vertically above the front side of the combing cylinder 1.
• the detaching roller 2 transports the fleece F1, F2 in the front-rear direction.
• a zipper frame 3 is disposed above the coating cylinder 1, and a cushion plate 4 is fixed to a tip of the nipper frame 3.
• a feed roller 5 is rotatably supported.
• a wrap Lp is supplied between the feed roller 5 and the cushion plate 4 from a wrap supply source (not shown), and the intermittent rotation of the feed roller 5 causes a wrap Lp required for one comming operation.
• Lp is provided near the tip 4 a of the cushion plate 4.
• a nipper arm pin 6 is attached to the center of the nipper frame 3, and a nipper arm 8 is rotatably supported on the nipper arm pin 6.
• a futaba knife 7 is fixed.
• the nipper knife 7 moves up and down at a predetermined timing by a known mechanism (not shown) in synchronization with the swinging movement of the nipper frame 3 based on the forward / backward movement.
• the top comb 9 is fixed so as to be disposed in front of the cushion plate 4 via a mechanism (not shown). The top com 9 performs a predetermined movement in synchronization with the nipper frame 3.
• An auxiliary nipper 10 is rotatably supported on the nipper arm pin 6.
• the catching nipper 10 is a well-known method for gripping the wrap pressed against the cushion plate 4 when the rear end of the bonded lap is pressed by the top comb 9.
• the drive mechanism (not shown) operates at a predetermined evening in accordance with the swinging of the flange 3.
• a nipper shaft 11 is disposed behind the combing cylinder 1 and below the flange frame 3 so as to be rotatable in both forward and reverse directions.
• the base end of the nipper frame drive arm 12 is fixed to the upper shaft 11 so as to be integrally rotatable.
• a support shaft 13 is fixed to the distal end of the arm 12, and the rear end of the two-bar frame 3 is rotatably supported on the support shaft 13.
• the lower support shaft 15 is disposed in the vicinity of the cylinder shaft 16, and the upper support shaft 14 is located behind the lower support shaft 15 and is shown in FIG.
• the nipper frame 3 is disposed forward of the position of the support shaft 13 when the nipper frame 3 is disposed at the most advanced position.
• the first ends (base ends) of the first and second swing levers 17 and 18 are rotatably supported by the support shafts 14 and 15 respectively.
• the second ends (tips) of the swing levers 17 and 18 are connected to both ends of the driven link 19 via support shafts 20 and 21 as movable fulcrums.
• a four-joint link is provided by both swinging levers 17 and 18, a driven link 19 as a connecting node, a support shaft 14 and 15 as a fixed support, and a support shaft 20 and 21 as a movable support.
• the mechanism is configured.
• a boss 19a is formed at the upper center of the driven link 19, and a hole 19b is formed by the boss 19a.
• the futaba frame 3 is moved relative to the driven link 19. It is rotatably supported.
• the distance from the fixed fulcrum 14 to the movable fulcrum 20 on both swing levers 17 is set to be equal to the distance from the fixed fulcrum 15 to the movable fulcrum 21 on the swing lever 18 .
• the second end of the swing lever 17 draws an arc-shaped trajectory protruding downward on the side of the nipper frame 3 (hereinafter referred to as a downwardly convex arc-shaped trajectory).
• an arc-shaped trajectory whose second end protrudes upward on the side of the cushion plate 4 hereinafter referred to as an upwardly projecting arc
• the arm 12 swings about the nipper shaft 11, and the support shaft 13 supported at the distal end of the arm 12 rotates as shown in FIG. It moves along the upwardly convex arc-shaped trajectory (a1 to a2) shown in Fig. 5
• the tip of the first swing lever 17 having the support shaft 14 as a fixed fulcrum is as shown in FIG.
• the tip of the second swing lever 18 with the support shaft 15 as a fixed fulcrum is along the upward convex arc (cl-c 2).
• the nipper frame When 3 is retracted from the most advanced position shown in Fig. 1, the support shaft 2 2 on the driven link 19 moves along the smooth S-shaped curve (A-B-C) shown in Fig. 4.
• the tip of the cushion plate 4 fixed to the nipper frame 3 (hereinafter referred to as the nipper tip) 4a has a smooth curve (L-M) shown in FIG. — Move along N).
• the position M is the position of the flap tip 4 a at the flap opening / closing position where the flap tip 4 a grips the lap Lp and releases the grip of the lap Lp in cooperation with the flute knife 7.
• the position N is the most retreat position of the flange 4a
• the position L is the most advanced position of the flange 4a. That is, the tip portion 4a reciprocates in the section between the position N and the position L, and in the rear section E2 between the position M and the position N in the entire reciprocating section, the nipper knives 7 and 2
• the wrap Lp gripped by the brim tip 4 a is subjected to a combing action by the needle segment (not shown) of the combing cylinder 1.
• the support shaft 22 moves in the rear section E 2 so as to draw an upwardly protruding arc-shaped trajectory, and the flange tip 4 a protrudes upward along the cylinder circle in the subsequent section E 2. Move so as to draw an arc.
• the zipper tip 4a moves from the retreating position N to the Move forward to position M. Also at this time, the nipper tip 4a draws an upwardly convex arc-shaped locus (N ⁇ M) along the cylinder cycle in the same manner as described above. Coating is also performed when the tip 4a of the flange moves from position N to position M. That is, at the time of swinging back toward the most retracted position N and at the time of swinging forward from the most retracted position N toward the position M, the flange 4a approaches the cylinder cycle, and Draw a convex arc-shaped locus along it.
• the tip end portion 4a of the wrapper moves at a constant interval with the cylinder cycle, so that the combing time of the lap Lp is prolonged and an effective coating is performed.
• One mining can be done.
• the operating range of the nipper frame 3 is as follows. It is smaller than the conventional configuration (type 3) that swings the nipper frame so that it moves along the tangent.
• the swing mechanism of the nipper frame 3 is constituted only by the link mechanism without using the cam mechanism, it is unlikely that the fly cotton or the like gets caught.
• the swing mechanism of the two-piece frame 3 according to the present invention does not employ a conventional multi-stage link that also uses a collar, generation of noise and vibration is suppressed, which is suitable for speeding up the machine base. Make it possible to get a corner.
• the first and second swing levers 17 and 18 constituting the four-bar link may have different lengths, or the length of the driven link 19 may be changed.
• the positions of the supporting shafts 14 and 15 as fixed fulcrums may be changed, or the position of the swinging fulcrum on the driven link 19, that is, the position of the supporting shaft 22 may be changed.
• a plurality of drive arms 12 may be fixed to one nipper shaft 11, and the nipper frames 3 may be rotatably connected to the respective drive arms 12 to swing. Further, the present invention may be applied to a frame not equipped with the auxiliary flange 10.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Preliminary Treatment Of Fibers (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=16083820

Family Applications (1)

Country Status (7)

Cited By (5)

Families Citing this family (14)

Citations (3)

Family Cites Families (19)

• 1993
  • 1993-07-21 JP JP5180472A patent/JPH0734332A/ja active Pending
• 1994
  • 1994-06-24 EP EP94918567A patent/EP0661395B1/en not_active Expired - Lifetime
  • 1994-06-24 CN CN94190460A patent/CN1111913A/zh active Pending
  • 1994-06-24 WO PCT/JP1994/001018 patent/WO1995003440A1/ja not_active Ceased
  • 1994-06-24 DE DE69400993T patent/DE69400993T2/de not_active Expired - Fee Related
  • 1994-06-24 US US08/362,543 patent/US5495643A/en not_active Expired - Fee Related
  • 1994-08-24 KR KR1019950700486A patent/KR0130005B1/ko not_active Expired - Fee Related

Patent Citations (3)

Also Published As

Similar Documents

Legal Events