CN114277497B - Transfer pick-up device of circular knitting machine - Google Patents

Abstract

The invention discloses a transfer pick-up device and a pick-up method for a circular knitting machine, which comprise a sleeving component, wherein a grabbing component is arranged below the sleeving component, the sleeving component and the grabbing component are arranged concentrically, the sleeving component and the grabbing component are respectively provided with a plurality of sleeving needles and grabbing pieces which are correspondingly matched and can move radially, and an axial driving device for driving the sleeving component and the grabbing component to move up and down relatively is arranged between the sleeving component and the grabbing component. According to the invention, the grabbing component capable of moving up and down in the axial direction is arranged below the nesting component, so that after the knitting of the hosiery fabrics is finished, the lower grabbing piece is matched with the nesting needle through axial and radial movement to separate and transfer the loops from the knitting needle. According to the invention, the loop is separated from the knitting needle and transferred to the outside of the V-shaped semi-closed loop sleeved with the picking needle through the matching of the picking sheet, and the picking sheet is firmly grabbed and fixed, so that the accidental separation of the knitting loop in the transfer process can be prevented, and the stable transfer process and the reliable operation are ensured.

Description

Transfer pick-up device of circular knitting machine

Technical Field

The invention relates to the technical field of circular knitting mechanical equipment, in particular to a hosiery machine, and more particularly relates to a transfer and pickup device of a circular knitting machine.

Background

In the field of the production of knitted articles for hosiery knitting machines or the like circular knitting machines, it is necessary to transfer the article from the machine for producing the article to another production unit in order to perform further work on the article which cannot be performed on said machine or which is not economically convenient.

In particular, in the field of hosiery production, methods have been developed in recent years for automatically performing the closing of the toe thereof by stitching or looping. Some of these methods are based on picking up the article from the machine for producing the article and transferring it to a station separate from the production machine to perform further work in order to close the toe of the article in other work stations, while the machine can continue to be used for producing the next article of hosiery. This method has the advantage over other methods based on performing the closing of the toe of the hosiery item directly on the machine for the production thereof, that the productivity of the machine is not unduly impaired.

Transfer pick-up devices act, firstly, to transfer the hosiery items, or the like tubular items, from the machine for their production to the next work station, and, secondly, to take the loops of knitting of the items individually from the needles of the machine by means of pick-up elements and to hold them during the transfer of the items.

The current technique for transferring the pick-up devices is basically complex and requires the hosiery knitting machine to leave enough axial space for the pick-up devices to enter when picking up the articles. In order to leave enough axial space for the pick-up device to enter, the yarn nozzle disc and the machine head are lifted very high, which not only complicates the structure of the machine but also causes the adjacent yarns to be wound, which affects the next work. Meanwhile, the knitting needle can deform after being used for a period of time, so that the error of the radial position of the knitting needle and the needle cylinder is caused, and the defects of missed grabbing of knitting loops and the like are caused during grabbing.

Disclosure of Invention

In view of the drawbacks of the prior art, the present invention provides a circular knitting machine transfer pick-up device for picking up a knitted tubular article from a circular knitting machine for hosiery or the like and transferring it to a unit adapted to perform additional operations on the article, having a high safety performance against accidental drops of loops of knitting during the transfer pick-up, a simple structure, a small axial occupation and a high precision of the abutment of the pick-up unit with the needles.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a circular knitting machine shifts pickup apparatus, gets the subassembly including the cover, the below of getting the subassembly is provided with snatchs the subassembly, the cover get the subassembly with snatch the subassembly and set up for concentric circles, the cover get the subassembly with it is provided with a plurality of corresponding complex cover that can radially move respectively and gets the needle and snatch the piece to snatch the subassembly, the cover get the subassembly with it gets the axial drive arrangement that both reciprocated relatively to snatch to be provided with the drive between the subassembly.

The picking device comprises an upper sleeving component and a lower sleeving component, the grabbing component can move axially up and down relative to the sleeving component, the sleeving needle is slidably mounted on a sleeving needle mounting disc of the sleeving component, the grabbing piece is slidably mounted on a grabbing piece mounting disc of the grabbing component, and the front and back radial sliding of the grabbing piece and the grabbing piece are controlled by respective corresponding control triangles. The sleeving and taking assembly is provided with sleeving and taking needles with the number corresponding to that of the knitting needles, the positions of the sleeving and taking needles correspond to those of the knitting needles one by one, the sleeving and taking needles can move outwards in the radial direction under the action of the cam disc and the sleeving and taking needle control cam, and the outer sides of the sleeving and taking needles are hooped with hoop springs for inward resetting. The sleeving and taking needle moves inwards in a reset mode, due to the action of elastic force of the hoop spring, the head of the sleeving and taking needle can automatically adapt to the error of the radial position of the knitting needle when the knitting needle is aligned, and the phenomenon that the loop is missed to be grabbed due to the fact that the knitting needle is not aligned with the upper hook is avoided. The grabbing component is provided with grabbing pieces with the number corresponding to that of the knitting needles, the grabbing pieces are positioned between the two sets of the grabbing needles, and the grabbing pieces can move outwards and inwards in the radial direction under the action of the cam disc and the grabbing needle control cam.

After the machine knitting is finished, the knitting needle is at the height to be picked up, the sock suction copper pipe rises to lift the hosiery knitting product, and the knitting loop is positioned on the needle tongue. The pick-up device is transferred to enter the upper part of the needle cylinder, the grabbing piece is at the first position, the covering needle is at the second position, and the grabbing device is at the ascending position. The transfer pick-up device descends and ascends, and the grabbing piece is matched with the sleeving and taking needle to separate the loop from the knitting needle and transfer the loop to the sleeving and taking needle, so that the loop can be prevented from being separated accidentally in the transfer process, and the transfer is stable and the operation is reliable.

Furthermore, the axial driving device comprises a plurality of axial driving cylinders connected with the grabbing assembly, and a guide shaft and an elastic resetting device are arranged between the sleeving assembly and the grabbing assembly.

Further, the below of snatching the subassembly is provided with the installation piece, the upper end of guiding axle with the subassembly is got to the cover is fixed, the lower extreme of guiding axle with the installation piece is fixed, just the guiding axle with snatch the subassembly clearance fit. The guiding axle is fixed and is being installed the piece and the cover is got between the subassembly, and the axial drives actuating cylinder and promotes to snatch the subassembly and reciprocate along the guiding axle, improves the precision of motion, avoids producing the displacement deviation. The grabbing component is provided with the mounting hole for mounting the guide sleeve, the guide sleeve and the grabbing component are in interference fit, the mounting structure is stable, the guide shaft moves up and down in the guide sleeve, direct abrasion between parts is reduced, and the service life is prolonged.

Furthermore, the elastic resetting device comprises a resetting pressure spring guide rod arranged between the sleeving component and the grabbing component, and a resetting pressure spring is sleeved on the resetting pressure spring guide rod. The bottom of the reset pressure spring guide rod is connected with the grabbing component, the guide rod is in clearance fit with the sleeving component, when the grabbing component is driven to move upwards, the reset pressure spring guide rod moves upwards, and the reset pressure spring is compressed to generate deformation. When the grabbing component needs to move downwards, the acting force generated by the restoration deformation of the reset pressure spring pushes the grabbing component downwards, so that the grabbing component can be quickly restored to the initial position.

Furthermore, the upper surface of snatching the subassembly with the lower surface of cover is got the subassembly and has been seted up the pressure spring mounting groove that resets, the bottom of pressure spring guide arm that resets is installed in the pressure spring mounting groove that resets, the upper end with the device sliding fit is got to the cover. One end of the reset pressure spring is abutted in a reset pressure spring mounting groove of the sleeving component, and the other end of the reset pressure spring is abutted in a reset pressure spring mounting groove of the grabbing component. When the lower grabbing component moves up and down, the reset pressure springs are driven to compress and stretch in the two reset pressure spring mounting grooves.

Furthermore, the upper end of the reset pressure spring guide rod is provided with a limiting clamp spring, and the upper surface of the sleeving and taking assembly is provided with a limiting step matched with the limiting clamp spring. The upper end at the pressure spring guide arm that resets is fixed to spacing jump ring, and when the effort that the pressure spring that resets resumes deformation production makes the below snatch the subassembly and reply the displacement downwards, the spacing jump ring in upper end and spacing step cooperation carry on spacingly to it, avoid moving down excessively, improve the precision of motion.

Further, the subassembly is got to the cover and is got needle mounting disc fixing base including the cover, the inner circle of needle mounting disc fixing base is got to the cover is provided with the cover and gets the needle mounting disc, the cover is got needle slidable mounting and is in on the cover gets the needle mounting disc, the cover is got needle mounting disc fixing base and is connected with the cover and gets needle control triangle mounting disc, the cover is got the below of needle control triangle mounting disc and is installed a plurality of curved covers and get needle control triangle, the cover is got the top of needle control triangle mounting disc and is connected with the cover and gets needle triangle control cam disc, the cover is got needle triangle control cam disc and is connected with its pivoted cover of drive and gets needle control cylinder, thereby the cover is got needle control cylinder and promotes the cover and get needle triangle control cam disc and rotate and promote the cover and get the radial movement that needle was got to the needle control triangle realization cover, snatch the subassembly with the cover is got the subassembly longitudinal symmetry and distributes and sets up. The grabbing component and all the components on the sleeving component are arranged in a vertically symmetrical distribution mode, so that the structure compactness is improved, and the axial occupied space is reduced.

Furthermore, the needle is got including the location guide card to the cover, the both sides of location guide card respectively set up a cover and get the needle piece, two the head contact laminating that the needle piece was got to the cover forms a V font semi-closed loop, the front end of grabbing the piece is equipped with two upper and lower snatching salient angles, the location mounting groove has been seted up to the both sides of location guide card, it sets up to triangle-shaped to snatch the salient angle. Through the descending and ascending of the transfer pick-up device, the two grabbing convex angles with different heights are matched with the sleeving needle, so that the loops are separated from the knitting needle and transferred to the outside of the V-shaped semi-closed loop of the sleeving needle, and are firmly grabbed by the grabbing pieces, the accidental separation of the knitted loops in the transfer process can be prevented, and the transfer is stable and the operation is reliable. The needle withdrawing sheet is arranged on two sides of the positioning guide sheet through the positioning mounting groove, so that the assembling accuracy and the operation convenience are improved. The triangle-shaped convex angle design of snatching is convenient for snatch and press to the coil, and the pointed end sets up the arcwall face, avoids the damage of closed angle to the coil.

Further, it includes grabbing piece control triangle to grab the subassembly, it is equipped with and snatchs piece effect groove to grab piece control triangle, the inner wall circular arc that snatchs piece effect groove is that the centre of a circle is concentric with the subassembly of snatching when grabbing piece control triangle in the outside, and the outer wall circular arc is that the centre of a circle is concentric with the subassembly of snatching when grabbing piece control triangle the most inboard.

The benefit that the inner and outer walls of the grabbing piece acting groove are not concentric is that when the grabbing piece control triangle moves outwards and the inner wall arc pulls the mounting boss of the grabbing piece, each grabbing piece on the circumference can move outwards to the same circumference, and otherwise when the grabbing piece control triangle moves inwards and the outer wall arc pushes the mounting boss of the grabbing piece, each grabbing piece on the circumference can move inwards to the same circumference.

The pick-up method of the transfer coil of the transfer pick-up device of the circular knitting machine comprises the following steps: the loop is released from the knitting needle to the extraction needle by the axial and radial movement of the lower gripping tab in cooperation with the extraction needle and is gripped by the gripping tab.

In summary, the grabbing component capable of moving axially up and down is arranged below the withdrawing component, so that after the knitting of the hosiery fabric is finished, the lower grabbing piece is matched with the withdrawing needle through axial and radial movement to separate and transfer the loops from the knitting needle. According to the invention, the loop is separated from the knitting needle and transferred to the outside of the V-shaped semi-closed loop sleeved with the picking needle through the matching of the picking sheet, and the picking sheet is firmly grabbed and fixed, so that the accidental separation of the knitting loop in the transfer process can be prevented, and the stable transfer process and the reliable operation are ensured. The present invention is used to pick up a knitted tubular article from a circular knitting machine for hosiery or the like and transfer it to a unit adapted to perform additional operations on the article, with high safety against accidental disengagement of the loops of knitting from the pick-up element; the structure is simple, the butt joint precision with the knitting needle is high, and the omission phenomenon of the pickup coil can not be caused; compact structure and small axial occupied space.

Drawings

FIG. 1 is a top view of the withdrawal assembly of the present invention with a schematic illustration of the configuration of the withdrawal control triangulation needle in which the withdrawal needle is in the first position, with some elements omitted for simplicity and clarity.

FIG. 2 is a top view of the withdrawal assembly of the present invention and a schematic structural view of a withdrawal control triangulation withdrawal needle with the withdrawal needle in a second position, with some elements omitted for simplicity and clarity.

Fig. 3 is a bottom view of the grasping assembly of the present invention and a schematic view of the grasping tab control cam grasping tab with the grasping tab in the first position and some elements omitted for simplicity and clarity.

Fig. 4 is a bottom view of the grasping element of the present invention and a schematic view of the structure of the grasping tab controlling the trigonometric grasping pin with the grasping tab in the second position, with some elements omitted for simplicity and greater clarity.

Fig. 5 is a left side view of the invention with a partial cross-sectional view of the gripping disk guide shaft and a partial cross-sectional view of the gripping disk axial drive cylinder with the gripping assembly in a lowered position.

Fig. 6 is a left side view of the invention with the gripping disk guide shaft partially cut away and the gripping disk axial drive cylinder partially cut away with the gripping assembly in the raised position.

Fig. 7 is an enlarged view of the axial driving device in fig. 6.

Figures 8-17 are exploded views of various actions of the transfer pick-up fabric loop of the present invention.

Description of the labeling: 1. a needle mounting plate fixing seat is sleeved; 2. a needle-taking control triangle mounting disc is sleeved; 2a, a guide groove; 2b, positioning pins; 3. a cam disc is controlled by a needle withdrawing triangle; 3a, a cam slot; 4. sleeving and taking a needle; 4a, sleeving a needle taking sheet on the left; 4b, positioning guide sheets; 4c, sleeving a needle taking sheet on the right side; 4d, V-shaped semi-closed loop; 4e, a hoop spring positioning opening; 5. a needle-taking control cylinder is sleeved; 6. a cylinder connector; 7. a pickup tray connection assembly; 8. an axial driving cylinder; 9. a pressure spring guide rod is reset; 10. an axial screw; 11. a needle-taking control triangle is sleeved; 12. a grabbing piece mounting disc fixing seat; 13. the grabbing piece controls the triangular mounting plate; 13a, a guide groove; 14. the cam plate is controlled by a grabbing plate triangle; 14a, a cam slot; 15. grabbing the sheet; 15a, an upper gripping lobe; 15b, a lower gripping lobe; 15c, a boss; 16. the grabbing piece controls the cylinder; 17. the cylinder is connected with a joint bearing; 18. mounting a sheet; 19. a grabbing piece control triangle; 19a, a grasping sheet acting groove; 19b, inner wall arc; 19c, outer wall arc; 20. a cylinder piston; 21. a guide shaft; 22. a guide sleeve; 23. resetting the pressure spring; 24. sleeving a needle mounting disc; 24a, sleeving a sheet mounting groove; 25. grabbing a piece mounting disc; 26. knitting needles; 26a, a latch; 27. a hoop spring; 28. hosiery knits; 28a, knitting loops; 29. a sock-absorbing copper tube; 30. a limiting clamp spring; 31. a boss; 32. a reset pressure spring mounting groove; 33. and a limiting step.

Detailed Description

A detailed embodiment of a transfer pick-up device of a circular knitting machine according to the present invention will be further described with reference to fig. 1 to 17.

The utility model provides a circular knitting machine shifts pickup apparatus, gets the subassembly including the cover, the below of getting the subassembly is provided with snatchs the subassembly, the cover get the subassembly with snatch the subassembly and set up for concentric circles, the cover get the subassembly with snatch the subassembly and be provided with a plurality of corresponding complex cover that can radially move respectively and get needle 4 and snatch piece 15, the cover get the subassembly with snatch and be provided with the axial drive arrangement that drives both reciprocal and reciprocate between the subassembly.

The transferring and picking device comprises a sleeving component and a grabbing component which are arranged up and down, the grabbing component can move axially up and down relative to the sleeving component, the sleeving needle 4 is slidably mounted on a sleeving needle mounting disc 24 of the sleeving component, the grabbing piece 15 is slidably mounted on a grabbing piece mounting disc 25 of the grabbing component, and the front and back radial sliding of the sleeving needle and the grabbing piece are controlled by respective corresponding control triangles. The extracting component is provided with extracting needles 4 with the number corresponding to the knitting needles 26, the positions of the extracting needles 4 correspond to the knitting needles 26 one by one, the extracting needles 4 can move outwards in the radial direction under the control cam action of the cam disc and the extracting needles 4, and the outer side of the extracting needles 4 is hooped with a hoop spring 27 for resetting inwards. The withdrawing needle 4 is reset to the inner side, and the head part of the withdrawing needle can automatically adapt to the error of the radial position of the knitting needle 26 when the knitting needle 26 is aligned due to the elastic force of the hoop spring 27, so that the stitch is prevented from being missed to be caught due to the fact that the upper hook is not aligned. The gripping assembly is provided with gripping tabs 15, corresponding in number to the needles 26, positioned between two sets of extraction needles 4, which can be moved radially outwards and inwards by the action of a cam disc and a gripping tab control cam 19.

At the end of the machine knitting, the needle 26 is at the level to be picked up, the suction tube 29 is raised and the hosiery knitting 28 is lifted, with the loop of knitting 28a above the latch 26 a. The pick-up device is transferred over the needle cylinder with the gripping tab 15 in the first position, the covering needle 4 in the second position and the gripping assembly in the raised position. The loop is separated from the knitting needle 26 and transferred to the covering needle 4 by the descending and ascending of the transferring and picking device and the cooperation of the grabbing piece 15 and the covering needle 4, thereby preventing the knitting loop 28a from being separated accidentally in the transferring process, and having stable transferring and reliable operation.

Preferably, in this embodiment, the axial driving device includes a plurality of axial driving cylinders 8 connected to the grasping assemblies, and a guide shaft 21 and an elastic resetting device are disposed between the extracting assembly and the grasping assembly.

Further, an installation piece 18 is arranged below the grabbing component, the upper end of the guide shaft 21 is fixed to the sleeving component, the lower end of the guide shaft 21 is fixed to the installation piece 18, and the guide shaft 21 is in clearance fit with the grabbing component. The guiding axle 21 is fixed between installation piece 18 and the assembly is got to the cover, and the axial drives actuating cylinder 8 and promotes to snatch the subassembly and reciprocate along guiding axle 21, improves the precision of motion, avoids producing the displacement deviation. The grabbing component is provided with a mounting hole for mounting the guide sleeve 22, the guide sleeve 22 and the grabbing component are in interference fit, the mounting structure is stable, the guide shaft 21 moves up and down in the guide sleeve 22, direct abrasion between parts is reduced, and the service life is prolonged.

Preferably, in this embodiment, the elastic resetting device includes a resetting compressed spring guide rod 9 disposed between the extracting assembly and the grabbing assembly, and a resetting compressed spring 23 is sleeved on the resetting compressed spring guide rod 9. The bottom of the reset pressure spring guide rod 9 is connected with the grabbing assembly, the guide rod is in clearance fit with the sleeving assembly, when the grabbing assembly is driven to move upwards, the reset pressure spring guide rod 9 moves upwards, and the reset pressure spring 23 is compressed to generate deformation. When the grabbing component needs to move downwards, the acting force generated by the restoration deformation of the reset pressure spring 23 pushes the grabbing component downwards, so that the grabbing component can be quickly restored to the initial position.

Preferably, in this embodiment, a reset pressure spring installation groove 32 is formed in the upper surface of the grabbing component and the lower surface of the sleeving component, the bottom of the reset pressure spring guide rod 9 is installed in the reset pressure spring installation groove 32, and the upper end of the reset pressure spring guide rod is in sliding fit with the sleeving device. One end of the reset pressure spring 23 is abutted in the reset pressure spring mounting groove 32 of the sleeving component, and the other end is abutted in the reset pressure spring mounting groove 32 of the grabbing component. When the lower grabbing component moves up and down, the reset pressure springs 23 are driven to compress and stretch in the two reset pressure spring mounting grooves 32.

In this embodiment, preferably, the upper end of the reset pressure spring guide rod 9 is provided with a limiting clamp spring 30, and the upper surface of the sleeving and taking assembly is provided with a limiting step 33 matched with the limiting clamp spring 30. The limiting clamp spring 30 is fixed at the upper end of the reset pressure spring guide rod 9, when the reset pressure spring 23 recovers the acting force generated by deformation to enable the grabbing component below to return to the displacement downwards, the upper limiting clamp spring 30 is matched with the limiting step 33 to limit the grabbing component, downward movement is avoided excessively, and the movement precision is improved.

As shown in fig. 5-7, a grabbing component is arranged below the nesting component, and the grabbing component can move up and down relative to the nesting component. The sleeving and taking needle mounting disc fixing seat 1 is provided with three groups of guide shaft mounting holes, and the upper ends of three groups of six guide shafts 21 are fixed by screws. The grabbing piece mounting disc fixing seat 12 is provided with 3 groups of guide sleeve mounting holes, three groups of six guide sleeves 22 (the guide sleeves and the guide sleeves are in interference fit) are arranged in the guide sleeve mounting holes, and the guide sleeve 22 is sleeved into the corresponding guide shaft 21, and the lower end of the guide shaft is provided with the guide shaft mounting piece 18 and fixed by screws. An axial driving cylinder 8 is arranged in the middle of each group of guide shafts 22, and the axial driving cylinder 8 is installed in a cylinder installation hole of the grabbing piece installation disc fixing seat 12. The bottom of a cylinder piston 20 arranged in the axial driving cylinder 8 is propped against the guide shaft mounting plate 18, the cylinder piston 20 is ventilated to push the axial driving cylinder 8 up under the action of air pressure, and then the axial driving cylinder 8 drives the grabbing component to move upwards axially. Three snatch a set pressure spring guide arm 9 that resets are adorned in the pressure spring pole guiding hole of cover needle mounting disc fixing base 1, and the top is blocked with spacing jump ring, and the pressure spring that resets 23 is gone into to the cover in the pole for it does the axial and resets down to snatch the subassembly.

This embodiment is preferred, the subassembly is got to the cover and gets needle mounting disc fixing base 1 including the cover, the inner circle that the needle mounting disc fixing base 1 was got to the cover is provided with the cover and gets needle mounting disc 14, the cover is got 4 slidable mounting of needle and is in the cover is got on the needle mounting disc 14, the cover is got needle mounting disc fixing base 1 and is connected with the cover and gets needle control triangle mounting disc 2, the cover is got needle control triangle mounting disc 2's below and is installed a plurality of curved covers and get needle control triangle 11, the cover is got needle control triangle mounting disc 2's top and is connected with the cover and gets needle triangle control cam disc 3, the cover is got needle triangle control cam disc 3 and is connected with its pivoted cover of drive and is got needle control cylinder 5, and the cover is got needle control cylinder 5 and promotes the cover and gets needle triangle control cam disc 3 and rotate thereby promote the cover and get needle control triangle 11 and realize the radial movement of cover and get needle 4, snatch the subassembly with the cover is got the subassembly and is gone up-and down the symmetric distribution setting. The grabbing component and all the components on the sleeving component are arranged in a vertically symmetrical distribution mode, so that the structure compactness is improved, and the axial occupied space is reduced.

In this embodiment, as shown in fig. 1-2, the extracting assembly preferably includes an extracting cam plate 3 installed above the extracting cam plate 2, the extracting cam plate 3 is provided with a plurality of cam slots 3a corresponding to the guide grooves 2a on the extracting cam plate 2, the cam slots 3a are spiral, the cam slots 3a are provided with shaft screws 10, and the shaft screws 10 penetrate from the cam slots 3a and are connected to the extracting cam 11 through the guide grooves 2 a.

5 groups of cam slots are uniformly distributed on the needle sleeving triangular control cam disc 3, the cam slots are similar to Archimedes spiral shapes, and the corresponding radius is changed along with the change of a rotation angle; the five sleeving and taking needle control triangles 11 are arranged in the space cavities among the sleeving and taking needle mounting disc fixing seat 1, the sleeving and taking needle mounting disc 24 and the sleeving and taking needle control triangle mounting disc 2; the shaft position screw 10 penetrates through the cam slot 3a of the cam control cam plate 3 and is connected with the screw hole of the needle withdrawing control cam 11 through the guide groove 2a of the control cam mounting plate 2. Thus, when the setting needle cam plate 3 is rotated, the cam slot 3a acts on the shaft screw 10, and the shaft screw 10 carries the setting needle cam 11 in the track direction of the guide groove 2 a. The needle sleeving and taking cam plate 3 is connected with a needle sleeving and taking control cylinder 5, the needle sleeving and taking control cylinder 5 is installed on a pickup device connecting assembly 7, the head of a piston rod of the needle sleeving and taking control cylinder 5 is connected with a cylinder connector 6, the connector of the needle sleeving and taking control cylinder 5 is connected with a cylinder connecting hole of the needle sleeving and taking cam plate 3, and therefore the needle sleeving and taking control cylinder 5 can stretch out and draw back to push the needle sleeving and taking cam plate 3 to rotate. The cam mounting disc 2 is provided with a plurality of positioning pins 2b distributed in equal radius, and the positioning pins 2b limit the outer diameter of the needle withdrawing cam control cam disc. The outer diameter of the sleeving and taking needle cam control cam disc 3 is limited by 3 positioning pins 2b with equal radius distribution, and the sleeving and taking needle cam control cam disc 3 can rotate around the center of the outer diameter.

The grabbing component comprises a grabbing plate triangular control cam disc 14 arranged above a grabbing plate triangular control cam mounting disc 13, a plurality of cam slots 14a are formed in the grabbing plate triangular control cam disc 14 and correspond to guide grooves 13a in the grabbing plate triangular control cam mounting disc 13, the cam slots 14a are spiral, shaft position screws 10 are arranged in the cam slots 14a, and the shaft position screws 10 penetrate through the cam slots 14a and are connected with grabbing needle control cams 19 through the guide grooves 13 a.

5 groups of cam slots 14a are uniformly distributed on the grabbing piece triangular control cam disc 14, the cam slots 14a are similar to Archimedes spiral shapes, and the corresponding radius is changed along with the change of the rotation angle; five grabbing piece control triangles 19 are arranged in the space cavities among the grabbing piece mounting disc fixing seat 12, the grabbing piece mounting disc 25 and the grabbing piece control triangle mounting disc 13; the shaft position screw 10 penetrates through the cam slot 14a of the cam control cam plate 14 and is connected with the screw hole of the grabbing needle control cam 19 through the guide groove 13a of the control cam mounting plate 13. Thus, when the cam plate 14 is rotated by the cam plate cam, the cam slot 14a acts on the axial screw 10, and the axial screw 10 carries the cam plate cam 19 in the track direction of the guide groove 14 a. The grabbing piece triangular control cam disc 14 is connected with a grabbing piece control cylinder 16, the grabbing piece control cylinder 16 is installed on the grabbing device connecting assembly 7, the head of a piston rod of the grabbing piece control cylinder 16 is connected with a cylinder connecting joint bearing 17, the cylinder connecting joint bearing 17 is connected with a cylinder connecting hole of the grabbing piece triangular control cam disc 14, and therefore the grabbing piece control cylinder 16 can stretch out and draw back to push the grabbing piece triangular control cam disc 14 to rotate. A plurality of positioning pins 13b distributed with equal radius are arranged on the triangular mounting disc 13, and the positioning pins 13b limit the outer diameter of the grabbing piece triangular control cam disc 14. The outer diameter of the cam disc is controlled by the grabbing plate cam 14 limited by 3 positioning pins 13b with equal radius distribution, and the grabbing plate cam 14 can rotate around the center of the outer diameter.

Preferably, in this embodiment, the withdrawing needle 4 includes a positioning guide plate 4b, two withdrawing needle plates are respectively disposed on two sides of the positioning guide plate 4b, the heads of the two withdrawing needle plates contact and attach to form a V-shaped semi-closed loop 4d, and the front end of the grasping plate 15 is provided with an upper grasping convex angle and a lower grasping convex angle. Through the descending and ascending of the transfer pick-up device, the two grabbing convex angles with different heights are matched with the covering needle 4, the loop is separated from the knitting needle 26 and transferred to the outside of the V-shaped semi-closed loop 4d of the covering needle 4 and is firmly grabbed by the grabbing piece 15, the accidental separation of the knitting loop 28a in the transfer process can be prevented, and the transfer is stable and the operation is reliable.

As shown in figure 7, the withdrawing needle 4 is formed by riveting and compounding a left withdrawing sheet 4a, a positioning guide sheet 4b and a right withdrawing sheet 4c, the head part of the withdrawing needle is contacted and jointed by a left withdrawing needle and a right withdrawing needle to form a V-shaped semi-closed loop 4d, the V-shaped semi-closed loop 4d corresponds to a needle hook 26 when a fabric loop is withdrawn, and the rear part of the withdrawing needle 4 is provided with a hoop spring positioning opening 4e.

The withdrawing needle mounting disc 24 is radially provided with withdrawing sheet mounting grooves 24a with the number corresponding to that of knitting needles 26, the withdrawing needles 4 with the corresponding number are arranged in the mounting grooves 24a of the withdrawing needle mounting disc 24 and can slide in the grooves, and a hoop spring positioning opening 4e at the rear part of the withdrawing needle 4 is hooped with a hoop spring 27 so as to be kept towards the inner side all the time. The withdrawing needle 4 slides radially in the mounting groove 24a of the withdrawing needle mounting plate 24 through the withdrawing control cam 11, and when the withdrawing control cam 11 is reset under the action of the hoop spring 27, the withdrawing needle 4 is reset inwards (when the position of the knitting needle 26 is deformed, the withdrawing needle 4 can automatically adapt to the position error of the knitting needle 26 when the position of the knitting needle is changed into an error.

In this embodiment, the grabbing component preferably comprises a grabbing piece control triangle 19, the grabbing piece control triangle 19 is provided with a grabbing piece acting groove 19a, an inner wall arc 19b of the grabbing piece acting groove 19a is that the circle center of the grabbing piece control triangle 19 is concentric with the grabbing component when the grabbing piece control triangle is at the outermost side, and an outer wall arc 19c is that the circle center of the grabbing piece control triangle 19 is concentric with the grabbing component when the grabbing piece control triangle is at the innermost side.

The benefit that the inner and outer walls of the grabbing piece acting groove are not concentric is that when the grabbing piece control triangle 19 moves outwards, the inner wall arc pulls the mounting boss 15c of the grabbing piece, each grabbing piece on the circumference can move outwards to the same circumference, and conversely, when the grabbing piece control triangle 19 moves inwards, the outer wall arc 19c pushes the mounting boss 15c of the grabbing piece, each grabbing piece on the circumference can move inwards to the same circumference.

The grabbing piece mounting disc 25 is radially provided with grabbing piece mounting grooves 25a of which the number is corresponding to that of the knitting needles 26, the grabbing pieces 15 of which the number is corresponding are arranged in the mounting grooves 25a of the grabbing piece mounting disc 25 and can slide in the grooves, the rear end of each grabbing piece 15 is provided with a boss 15c, and the boss 15c is embedded in a grabbing piece acting groove 19a of the grabbing piece control cam 19. The grasping pieces 15 are radially slid in the mounting grooves 25a of the grasping piece mounting plate 25 by the grasping piece controlling cams 19.

In this embodiment, preferably, two sides of the positioning guide piece 4b are provided with positioning installation grooves, and the grabbing convex angle is set to be triangular. The 4 pieces of needle are got to cover and are installed in the both sides of location guide card 4b through the location mounting groove, improve the precision of assembly and the convenience of operation. The triangle-shaped convex angle design of snatching is convenient for snatch and press to the coil, and the pointed end sets up the arcwall face, avoids the damage of closed angle to the coil.

The pick-up method of the transfer coil of the transfer pick-up device of the circular knitting machine comprises the following steps: the loop is released from the knitting needle to the extraction needle by the axial and radial movement of the lower gripping tab in cooperation with the extraction needle and is gripped by the gripping tab. The method specifically comprises the following steps:

as shown in figure 8, the machine knitting is finished, the needle 26 is at the height to be picked up, the suction tube 29 is raised and the hosiery knitting 28 is lifted, the loop 28a being above the latch 26 a. The pick-up device is transferred over the needle cylinder with the gripping tab 15 in the first position, the covering needle 4 in the second position and the gripping assembly in the raised position.

As shown in fig. 9, the transfer pick-up is lowered and the bottom of the 15-grip tab presses the 28a loop of knitting down under the 26a needle bar.

As shown in fig. 10, the grip tab 15 is withdrawn in the second position out of contact with the loop of knitting 28 a.

As shown in fig. 11, the gripper assembly is lowered in the lowered position.

As shown in fig. 12, the grip tab 15 is brought into the first position, the lower grip lobe 15b gripping the loop of knitting 28 a; the extraction needle 4 enters a first position, and a loop cavity of a V-shaped semi-closed loop 4d at the head part of the extraction needle is inserted with a needle hook 26.

As shown in fig. 13, the gripping disc assembly is raised in the raised position and the lower gripping lobes 15b lift the loop of knitting 28a by one height.

As shown in figure 14, the grip tab 15 is withdrawn in the second position, out of contact with the loop of knitting 28 a.

As shown in fig. 15, the gripping assembly is lowered in the lowered position, the gripping tab 15 is brought into the first position and the upper gripping lobe 5a grips the loop of knitting 28 a.

As shown in fig. 16, the gripping disk assembly is raised to the raised position, and the upper gripping lobe 15a pulls the loop of knitting 28a out of the latch 26a and over the V-shaped semi-closed loop 4d, whereupon the loop of knitting 28a is placed over the V-shaped semi-closed loop and secured by the gripping tab 15.

As shown in fig. 17, the transfer pick-up device is raised, and the zigzag semi-closed loop 4 dv of the covering needle 4 is formed by two pieces, which automatically spring open to avoid catching the hook of the knitting needle 26 when lifted off the hook. So that the hosiery knitting 28 is successfully picked up from the cylinder needle 26.

To sum up, the transfer pick-up device of the invention described above is capable of fitting the loops of knitting of hosiery knitting outside the V-shaped semi-closed loop and secured by the grip flaps, picking up the knitted tubular article and transferring it to a unit adapted to perform additional operations on the article in a circular knitting machine for hosiery or the like; the invention has a high safety against accidental disengagement of the loop of knitting from the pick-up element, in any case with a high constructive simplicity and ensures an excellent precision of the coupling of the pick-up element to the needles of the machine for producing the manufactured articles; the invention is composed of a thin nesting disk and a grabbing disk, and the axial space occupies a small space; the loop-taking needles of the invention correspond to knitting needles one by one, each loop-taking needle has an error which is automatically adapted to the radial position of the knitting needle when a hoop spring is pushed into a first position, so as to avoid missing knitting loops.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (8)

1. A circular knitting machine transfer pick-up device is characterized in that: get the subassembly including the cover, the below that the subassembly was got to the cover is provided with and snatchs the subassembly with it sets up for the concentric circles to snatch the subassembly with it is provided with a plurality of corresponding complex cover respectively and gets the needle and grab the piece to snatch the subassembly, the cover get the subassembly with it is provided with the drive axial drive device that both reciprocated relatively to snatch between the subassembly, the cover gets the subassembly and gets needle mounting disc fixing base including the cover, the cover is got the inner circle of needle mounting disc fixing base and is provided with the cover and gets the needle mounting disc, the cover is got needle slidable mounting and is in on the cover gets the needle mounting disc, the cover is got needle mounting disc fixing base and is connected with the cover and gets needle control triangle mounting disc, the cover of cover is got needle control triangle mounting disc and is installed a plurality of curved cover and is got needle control triangle, the cover is got needle control triangle control mounting disc top of cover and is connected with the cover and gets needle triangle control cylinder, the cover is got needle triangle control cam disc and is connected with its pivoted cover and is got needle control cylinder, thereby the cover is got needle triangle control cylinder and promote the cover and is got needle triangle control cylinder and rotate and promote to push the cover and realize that the cover and get needle control triangle cover and get the radial removal that the needle control triangle cover subassembly and set up and get the contact piece and pick the head and get two closed loop and get the closed loop and draw the needle slice and draw the head portion and draw the contact and set up and draw the closed loop and draw the needle control head portion and draw the formation.

2. The circular knitting machine transfer pick-up device according to claim 1, characterized in that: the axial driving device comprises a plurality of axial driving cylinders connected with the grabbing component, and a guide shaft and an elastic resetting device are arranged between the sleeving component and the grabbing component.

3. The circular knitting machine transfer pick-up device according to claim 2, characterized in that: the lower part of the grabbing component is provided with a mounting piece, the upper end of the guide shaft is fixed with the sleeving component, the lower end of the guide shaft is fixed with the mounting piece, and the guide shaft is in clearance fit with the grabbing component.

4. The circular knitting machine transfer pick-up device according to claim 2, characterized in that: the elastic resetting device comprises a resetting pressure spring guide rod arranged between the sleeving component and the grabbing component, and a resetting pressure spring is sleeved on the resetting pressure spring guide rod.

5. A circular knitting machine transfer pick up according to claim 4, characterized in that: the upper surface of snatching the subassembly with the lower surface of cover subassembly is got and has been seted up the pressure spring mounting groove that resets, the bottom of pressure spring guide arm that resets is installed in the pressure spring mounting groove that resets, the upper end with the subassembly sliding fit is got to the cover.

6. A circular knitting machine transfer pick up according to claim 5, characterized in that: the upper end of the reset pressure spring guide rod is provided with a limiting clamp spring, and the upper surface of the sleeving component is provided with a limiting step matched with the limiting clamp spring.

7. The circular knitting machine transfer pick-up device according to claim 1, characterized in that: and positioning mounting grooves are formed in two sides of the positioning guide sheet, and the grabbing convex angle is triangular.

8. The circular knitting machine transfer pick-up device of claim 7, wherein: the grabbing component comprises a grabbing piece control triangle, the grabbing piece control triangle is provided with a grabbing piece action groove, the inner wall arc of the grabbing piece action groove is concentric with the grabbing component when the inner wall arc grabs the piece control triangle at the outermost side, and the outer wall arc grabs the piece control triangle at the innermost side and is concentric with the grabbing component.

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