CN107385685B

CN107385685B - Device and method for sewing tubular fabric

Info

Publication number: CN107385685B
Application number: CN201710595118.7A
Authority: CN
Inventors: 杨志林
Original assignee: Zhejiang Jiazhili Intelligent Technology Co ltd
Current assignee: Zhejiang Jiazhili Intelligent Technology Co ltd
Priority date: 2017-07-20
Filing date: 2017-07-20
Publication date: 2022-11-01
Anticipated expiration: 2037-07-20
Also published as: CN107385685A

Abstract

The invention discloses a device and a method for sewing tubular fabrics, comprising a transfer device, a clamping disc, a turnover device and a sewing device; the transfer device comprises a transfer disc, and the transfer disc is used for taking off the woven tubular fabric and transferring the tubular fabric to a clamping disc for clamping; the clamping disc comprises 2 semi-circular seaming discs which can be folded; the stitching device is positioned on the side surface of the clamping disc; the turnover device comprises a first tubular part and a second tubular part, the first tubular part is coaxially positioned below the clamping disc, and the second tubular part is coaxially fixed above the clamping disc; the first tubular part and the second tubular part are both connected with a negative pressure air source. The invention realizes the turnover of the tubular fabric by using the pneumatic device, replaces a device for turnover by using a mechanical principle in the prior art, and reduces the complexity and the failure rate of the structure.

Description

Device and method for sewing tubular fabric

Technical Field

The invention belongs to the technical field of circular knitting machines, and particularly relates to a device and a method for sewing tubular fabrics.

Background

Circular hosiery knitting machines often require sewing of tubular fabrics after they have been knitted. Devices are known in the prior art for picking up the tubular fabric knitted by circular hosiery knitting machines and for transferring it to a sewing or looping station provided with a sewing or looping head through which the tubular fabric is sewn. In general, the pick-up device picks up the fabric from the circular hosiery knitting machine and transfers it to the transfer device, optionally by cooperating respectively with the loops of knitting of the row of knitting of the end of the fabric, so that the half-rows of loops of knitting of the row of knitting of the end of the fabric face respectively the other half-rows of loops of knitting before the sewing or looping, so as to join the two loops of the two half-rows of knitting of the row facing each other by means of the sewing or looping head, thus acting to close the end of the fabric.

In the process of automatically closing tubular knitted articles, the sewing or looping operation is generally carried out on fabrics turned inside out, so that the sewing or looping stitches are hardly visible on the front side of the fabric, i.e. on the side normally not visible when the fabric is worn, so that fabrics such as hosiery can be obtained with good precision and aesthetic appearance. Tubular fabrics knitted by circular knitting machines are usually faced outwards, so that when the tubular fabrics are closed at the sewing or looping station, the tubular fabrics are subjected to the sewing or looping operation after being turned inside out by a turner.

The known flippers are basically tubular structures, which are positioned under a gripper or pick-up device that grips the bottom closed end of the tubular fabric, with the upper end of the tubular structure facing the suspended fabric, then the inside of the tubular structure is connected to a suction device, so that the suspended fabric is sucked through its upper end, and then the tubular structure is raised to pass with its upper end through the to-be-closed end of the tubular fabric, while during the passage the fabric is turned inside out onto the outer surface of the tubular structure, turning the inside out.

Patent No. 2009801088587 discloses a device for turning over a tubular knitted article, in particular for automatically closing a sewing or looping station of the tubular article at an axial end thereof, comprising a lower portion and an upper portion, the upper and lower portions being respectively arranged below and above a middle region at which is arranged or arrangeable a device for supporting the tubular article to be turned over, the tubular article being suspended and substantially vertically arranged at an axial end thereof; and a tubular body insertable with its upper axial end from the bottom upwards through the axial end of the article suspended on the support means after having sucked it through the upper axial end of the tubular body, so as to cause the article held by the support means to be everted onto the outer lateral surface of the tubular body, the article being progressively extracted from the upper axial end of the tubular body, the eversion means comprising auxiliary sliding means movable on command with respect to the tubular body parallel to the axis of the tubular body and periodically engageable and disengageable with respect to the article everted onto the outer lateral surface of the tubular body, so as to generate a sliding of the article towards the lower axial end of the tubular body. The auxiliary sliding device is used for pushing down the article outside the tubular body, and the article is sucked from the lower part of the tubular piece by air suction inside the tubular piece, so that the article which is sewn and turned outwards is turned over again. Although this device satisfies the requirement of upset fabric basically, the overall structure of device is too complicated, and the auxiliary sliding device often breaks down when using moreover, leads to the machine to halt by accident or tubulose fabric card is bad, is unfavorable for promoting on a large scale. And the final finished product of the tubular fabric is outward in front, the suture line or the crocheted line is inward, the tubular fabric still needs to be turned outwards during the quality inspection of a factory, and the sewing effect is detected, so that the device turns the front out from the inner side at last, the quality inspection process of the factory is increased, and the labor cost is increased.

Disclosure of Invention

A first object of the present invention is to solve the above problems and to provide a device for seaming tubular fabrics which is simple in structure and low in failure rate.

A second object of the present invention is to provide a method for sewing tubular fabrics that allows to pick up the tubular fabric from the circular knitting machine and to turn it over.

In order to realize the first purpose, the technical scheme of the invention is as follows: an apparatus for seaming a tubular fabric, characterized by: comprises a transfer device, a clamping disc, a turnover device and a sewing device; the transfer device comprises a transfer disc, and the transfer disc is used for taking off the woven tubular fabric and transferring the tubular fabric to the clamping disc for clamping; the clamping disc comprises 2 semicircular sewing discs which can be folded; the stitching device is positioned on the side surface of the clamping disc; the turnover device comprises a first tubular part and a second tubular part, the first tubular part is coaxially positioned below the clamping disc, and the second tubular part is coaxially fixed above the clamping disc; the first tubular part and the second tubular part are both connected with a negative pressure air source.

Furthermore, a first lifting device for driving the first tubular part to axially move up and down is arranged on the side face of the first tubular part, and when the first tubular part is at a lifting position, the top end of the first tubular part is lower than the position of the clamping disc.

Further, the first tubular member is also connected with a positive pressure air source.

Furthermore, the connecting end of the first tubular part and the positive pressure air source is positioned on a pipeline of the first tubular part connected with the negative pressure air source; and a solenoid valve is arranged on a pipeline between the negative pressure air source and the positive pressure air source and is used for communicating or isolating the atmosphere.

Furthermore, a platform is fixedly arranged on the side surface of the turnover device and is positioned below the moving track of the transfer disc; the surface of the platform is made of smooth materials.

Furthermore, the turnover device is provided with 2 infrared monitors, and the monitoring areas of the 2 infrared monitors are respectively above and below the clamping disc.

Further, the turnover device further comprises a pressing plate which is independently arranged on the outer side of the first tubular member, the pressing plate is used for moving the tubular fabric upwards from the transfer plate to the clamping plate, and the first tubular member and the pressing plate form an absorbing component; and a second lifting device for driving the whole object suction assembly to move up and down is arranged on the outer side of the object suction assembly.

Further, the top end of the first tubular part is an inclined flat cut or a concave hyperbolic cut.

In order to achieve the second purpose, the technical scheme of the invention is as follows: a method for seaming a tubular fabric, characterized by: the method comprises the following steps:

a) The transfer device transfers the tubular fabric knitted on the circular knitting machine to a transfer disc;

b) The transfer disc moves to a position between the clamping disc and the first tubular member, the first tubular member is in a negative pressure state, the electromagnetic valve is isolated from the atmosphere, and the other end of the tubular fabric is sucked into the first tubular member;

c) The first tubular part stops negative pressure, the electromagnetic valve is communicated with the atmosphere, the second tubular part is in a negative pressure state, the tubular fabric is sucked upwards and sucked into the second tubular part, the tubular fabric is turned over once, and the reverse side of the tubular fabric faces outwards;

d) The pressing disc moves upwards to transfer the tubular fabric on the transfer disc to the clamping disc, and the clamping disc fixes one end of the tubular fabric to be sewn;

e) After the pressure plate moves downwards, the infrared monitor monitors, and the transfer plate leaves the axis of the clamping plate and the first tubular part;

f) Folding 2 semicircular ring-shaped sewing disks of the clamping disk, and sewing by using a sewing device;

g) After the sewing operation is completed, the tubular fabric is released by the clamping disc, and the tubular fabric is separated from the second tubular member, so that the sewing operation is completed.

Further, during step c), the first tubular member is in a positive pressure state, assisting the tubular fabric to evert upwardly into the second tubular member.

Further, during step c), the first tubular member is moved to the raised position by the first lifting device.

Further, during step b), the assembly of the first tubular member and the platen is driven to move downwards by the second lifting device, so that the other end of the tubular fabric enters the first tubular member, and then the second lifting device drives the assembly to move upwards integrally to the original position.

When the tubular fabric suction device works, the tubular fabric is transferred to the clamping disc through the transfer device, the other end of the tubular fabric hanging down is sucked into the first tubular part by utilizing the negative pressure (air suction) state in the first tubular part, so that the tubular fabric is in a vertical state as a whole, if the tubular fabric is too long, the first tubular part can move up and down for several times to ensure that the tubular fabric is completely sucked, and at the moment, the front side of the tubular fabric faces outwards, namely, the visible side faces outwards when the fabric is worn. Then stopping negative pressure (air suction) state of the first tubular part, namely the electromagnetic valve is communicated with the atmosphere, cutting off the connection between the first tubular part and a negative pressure air source, utilizing the negative pressure (air suction) state of the second tubular part to suck the tubular fabric upwards, sucking the tubular fabric into the second tubular part, and because one end of the tubular fabric is fixed, after the tubular fabric is sucked up by the second tubular part, turning the tubular fabric from inside to outside, wherein the reverse side of the fabric faces outwards at the moment, namely the side which is usually invisible when the fabric is worn is beyond the outside; if the tubular fabric is too long, the first tubular member can be switched to a positive pressure (blowing) state to assist the tubular fabric to turn upwards into the second tubular member. After the 2 semicircular ring seaming disks of the clamping disk are folded in half, the tubular fabric on the clamping disk is sewed by the side sewing device, after sewing is finished, the tubular fabric is separated from the clamping disk, the tubular fabric is continuously adsorbed by the second tubular part and comes out from a discharge port connected with the upper end pipeline of the second tubular part, and the whole weaving and sewing work of the tubular fabric is finished.

The first tubular part integrates a negative pressure (air suction) function and a positive pressure (air blowing) function, the negative pressure state plays a role in transferring the tubular fabric, the positive pressure state plays a role in assisting the turning of the tubular fabric, the first tubular part utilizes the electromagnetic valve between the negative pressure air source and the positive pressure air source to communicate or isolate the atmosphere, and when the first tubular part is in the negative pressure state, namely the tubular fabric needs to be adsorbed, the electromagnetic valve isolates the atmosphere to ensure that the interior of the first tubular part is in the negative pressure state; when the second tubular piece needs to adsorb the tubular fabric, especially when the first tubular piece is in the positive pressure state and blows air, the solenoid valve needs to be communicated with the atmosphere to avoid a vacuum state in the first tubular piece, so that the fabric can smoothly enter the second tubular piece. A platform on the side of the first tubular element, which connects the first tubular element to the circular knitting machine, makes it easier for the first tubular element to suck the tubular fabric; the first tubular part can be driven by the first lifting device on the side surface to move up and down for several times, so that the difficulty of sucking tubular fabrics is reduced; the whole structure of the first tubular member is driven by the second lifting device to move downwards, so that the difficulty of sucking tubular fabrics can be reduced. The clamping disc between the first tubular element and the second tubular element is inevitably communicated with the atmosphere, so that pressure is relieved, and therefore when tubular fabric needs to be sucked into the second tubular element, the first tubular element is in a lifting position, so that air leakage can be reduced as much as possible, and negative pressure in the second tubular element can be maintained.

First infrared monitor is installed in second tubular part bottom, and monitoring range closes on the grip slipper top for whether the monitoring tubulose fabric is sucked and targets in place, and the infrared monitor of second is located the grip slipper below, and monitoring range is the grip slipper below, and to this region of first tubular part top, the fabric on the transfer dish begins the monitoring after transferring to the grip slipper, is used for monitoring whether the tubulose fabric is all sucked in the second tubular part, guarantees the normal clear of tubulose fabric upset work.

The invention realizes the turnover of the tubular fabric by using the pneumatic device, replaces a device for turnover by using a mechanical principle in the prior art, and reduces the complexity and the failure rate of the structure; the back surface of the sewn fabric faces outwards, so that subsequent quality inspection work is facilitated, and the labor cost is reduced; the whole device has simple structure and stable operation, and is more suitable for large-scale popularization.

Drawings

The following detailed description is made with reference to the accompanying drawings and embodiments of the present invention

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural diagram of the turning device of the present invention;

FIG. 3 is a cross-sectional view of the flipping mechanism of the present invention;

FIG. 4 is an enlarged partial view of an absorbent web of the absorbent assembly of the present invention;

FIG. 5 is an enlarged view of a portion of the suction fabric of the material transfer assembly of the present invention;

FIG. 6 is a schematic view of the present invention;

FIG. 7 is a cross-sectional view of the material handling assembly of the present invention;

FIG. 8 is a schematic view of the construction of the getter assembly of the present invention;

figure 9 is a cross-sectional view of a blotter assembly of the present invention;

FIG. 10 is a cross-sectional view of an alternative construction of the inverting apparatus of the present invention;

fig. 11 is a partially enlarged view of fig. 10.

Labeled as: the automatic cloth feeding and conveying device comprises a turnover device 1, a suction assembly 11, a first tubular member 111, a lifting motor 112, a screw 113, a movable block 114, a first suction pipe 115, a first control valve 116, a blowing pipe 117, an electromagnetic valve 118, a pressing plate 119, a clamping assembly 12, a clamping disc 121, a cloth conveying assembly 13, a second tubular member 131, a rack 132, a platform 14, a second lifting device 15, a lifting base 151, a guide rail 152, a slide block 153, an air cylinder 154, a movable rod 155, a fixed block 156, a circular knitting machine 2, a transfer device 3, a transfer disc 31, a sewing device 4, a rack 5 and a tubular fabric 6.

Detailed Description

See the drawings. The embodiment comprises a turnover device 1, a circular knitting machine 2, a transfer device 3, a sewing device 4 and a frame 5; the frame 5 is arranged on the side of the circular knitting machine 2, the turnover device 1 is arranged on the frame 5, the side of the turnover device 1 is provided with a platform 14, the surface of the platform is made of smooth materials, one end of the platform 14 is fixed on the turnover device 1, the other end of the platform is close to the circular knitting machine 2 and can be put on the circular knitting machine or only face the circular knitting machine, and the platform 14 is positioned below the moving track of the transfer disc 31, so that the tubular fabric can be transferred conveniently.

The turnover device 1 can be divided into an article suction component 11, a clamping component 12 and an article conveying component 13; the transfer device comprises a transfer disc 31 and a transfer arm, the transfer arm is arranged on the rack 5, and the transfer disc 31 is arranged on the transfer arm and can move back and forth under the driving of the transfer arm; the transfer disc is of a circular structure, transfer needles are arranged on the inner ring of the transfer disc and are wound into a circle, and the transfer needles are used for transferring tubular fabrics from a needle bed of the circular knitting machine 2 in a needle-to-needle manner; the stitching device 4 is mounted on the frame 5, on the side of the central position of the overturning device, i.e. on the side of the clamping assembly.

The turnover device 1 can be divided into an article suction component 11, a clamping component 12 and an article delivery component 13, wherein the article suction component 11 is positioned below the clamping component 12, the article delivery component 13 is positioned above the clamping component 12, and the article suction component 11, the clamping component 12 and the article delivery component 13 are positioned on the same axis; the article suction assembly 11 comprises a rectangular shell, a first tubular member 111 and a pressure plate 119 are arranged in the rectangular shell, the pressure plate 119 is independently sleeved on the periphery of the first tubular member, the pressure plate can independently lift, a circle of floating bridge (tooth sheet) is arranged on the outer ring of the upper surface of the pressure plate, and a coil at one end to be sewn of a tubular fabric can be moved to the clamping assembly from a transfer needle of the transfer plate.

A first lifting device is arranged on the side surface of the first tubular member 111, the first lifting device comprises a lifting motor 112, a screw rod 113 and a movable block 114, the lifting motor 112 drives the screw rod 113 to rotate, and the movable block 114 is in rotary fit with the screw rod 113; the first tubular member 111 and the movable block 114 are fixed into a whole, the lead screw 113 drives the movable block 114 and simultaneously drives the first tubular member 111 to move up and down, and when the first tubular member 111 adsorbs tubular fabrics, the first tubular member 111 is moved up and down rapidly, so that the tubular fabrics can be completely adsorbed into the first tubular member 111.

The lower end of the first tubular member 111 is connected with a first air suction pipe 115, the first air suction pipe 115 is connected with a suction fan, a first control valve 116 is arranged in the first air suction pipe 115, the first control valve is of a three-way structure and comprises a valve body and a valve motor, 3 ports are arranged on the valve body, the first end is communicated with the suction fan, the second end is connected with the first tubular member, and the third end is of an open structure, namely is connected with the external atmosphere; the valve body is internally provided with a rotary valve plate which is connected with a valve motor, and the valve motor drives the rotary valve plate to rotate to connect each port; when the first tubular part is in a suction state and needs to adsorb tubular fabrics, the first end is communicated with the second end, and the first tubular part is directly connected with a suction fan; when the first tubular member is in a non-suction state, the first end and the second end are respectively communicated with the third end, and the suction fan cannot be closed because the suction fan is also connected with the rest air pipes, so that the suction fan is communicated with the atmosphere, and the first tubular member is also connected with the atmosphere, so that the first tubular member is separated from a state of adsorbing tubular fabrics.

The lower end of the first tubular member 111 is further connected with an air blowing pipe 117, the air blowing pipe 117 is connected with an air pump, the connecting end of the air blowing pipe and the first tubular member 111 is located in front of the connecting end of the first tubular member and the suction fan, and a solenoid valve 118 is arranged on a pipeline between the connecting end of the air blowing pipe and the first tubular member 111 and the suction fan and used for communicating or isolating the atmosphere. The air pump is closed by computer program control, and when the tubulose fabric of production is too long, in order to make the fabric overturn to the top completely, the air pump is aerifyd first tubulose 111, and first tubulose 111 is blown to the tubulose fabric, and supplementary tubulose fabric upset, at this moment, first end and second end are equallyd divide and are do not communicate with the third end in the first control valve, avoid the first tubulose of vacuum state to be difficult to blow. When the first tubular element 111 is in the suction condition, the solenoid valve 118 is isolated from the atmosphere and communicates the first tubular element with the suction fan; when the first tubular member 111 is in a non-aspirating state, taking the first tubular member in an aspirating state as an example, the solenoid valve 118 is connected to the atmosphere to block the connection between the first tubular member and the suction fan, thereby ensuring that the first tubular member is in an air blowing state.

As shown in fig. 10, another structure of the suction assembly 11 is that a second lifting device 15 is disposed at an outer side of a rectangular housing of the suction assembly 11 to drive the whole suction assembly 11 to move up and down, the second lifting device 15 includes a lifting base 151, the lifting base 151 is mounted on a machine frame, a guide rail 152 is disposed on the lifting base 151, and a slide block 153 matched with the guide rail is fixed to the suction assembly 11; an air cylinder 154 is installed on the lifting base 151, a fixed block 156 is fixed at the top end of a movable rod 155 of the air cylinder, and the fixed block 156 and the object suction assembly 11 are fixed into a whole. The cylinder 154 drives the movable rod 155 and the fixed block 156 to move, and can drive the suction assembly 11 to move downwards and then move upwards for resetting, and the sliding block 153 on the suction assembly is matched with the guide rail 152 to ensure the stability of moving upwards and downwards. When the tubular fabric is too long, in order to enable the tubular fabric to be smoothly sucked into the first tubular member 111, the air cylinder pushes the movable rod 155 downwards to drive the whole object suction assembly 11 to move downwards, so that the distance between the object suction assembly 11 and the transfer assembly 12 is increased, the tubular fabric can conveniently enter the first tubular member 111, and after the tubular fabric smoothly enters the first tubular member 111, the whole object suction assembly 11 can move upwards to the original position for subsequent work.

The centre gripping subassembly 12 has centre gripping dish 121, the centre gripping dish comprises 2 semicircle ring stitches dishes that can fold each other, initial condition, 2 semicircle ring stitches dish formation a ring annular structure, the transfer needle of transfer dish aligns the back with the seam needle of semicircle ring stitches dish, pressure disk 119 shifts up and utilizes floating bridge (dentate lamella) to push away tubular fabric from the transfer needle to the seam needle of this semicircle ring stitches dish on, 2 semicircle ring stitches dishes can be to folding under drive arrangement's drive afterwards, to folding back, the scraper blade scrapes the coil of top semicircle ring stitches dish on the semicircle ring stitches dish of below, make tubular fabric wait to sew up the coil alignment after one end is folded, be convenient for the quick seam tubular fabric of suturing device. The sewing needle of the sewing device can move to the folded semicircular sewing disk to start to perform quick sewing, so that the problems of wrong sewing and missed sewing of the sewn fabric can be avoided.

The article conveying component 13 is fixed on the frame 5 and comprises a second tubular member 131, the second tubular member 131 is fixed on a shelf 132, the shelf 132 is fixed with the clamping component 12, and the lower port of the second tubular member 131 is aligned with 2 semicircular ring sewing discs of the clamping component 12; the upper end of the second tubular member 131 is connected with a second air suction pipe, one way of the second air suction pipe is connected with a suction fan, the other way of the second air suction pipe is connected with a discharge port, a second control valve is arranged in the second air suction pipe, the second control valve controls the air suction on-off of the second air suction pipe, the air suction state in the second tubular member is a normally open state, tubular fabrics arranged in the first air suction pipe are sucked up, in the adsorption process, one end of the tubular fabrics is fixed on the clamping component 12, all the tubular fabrics adsorbed in the second tubular member 131 are in an outwards-turned state, namely, the inner side faces face faces outwards, and the sewing thread convenient to use is positioned on the inner side of the fabrics. The sewed fabric is separated from the clamping assembly and is adsorbed to the discharge hole by the second air suction pipe, and at the moment, due to the existence of suction force, the fabric cannot fall down, so that the second control valve is closed instantly and is opened again, the fabric can fall into the discharge hole, and the discharge work is completed.

In order to prevent the fabric from being jammed in the overturning process, a first infrared monitor is arranged at one end, close to the clamping disc 121, of the second tubular member 131 and used for monitoring whether the fabric is overturned into the second tubular member, a second infrared monitor is arranged on one side below the clamping assembly 12, when a coil on the transfer disc is transferred onto the clamping disc 121 and the transfer disc is not moved away, monitoring is started to monitor whether the fabric is overturned into the second tubular member completely and whether no fabric remains in the area, if yes, the fabric jamming problem is indicated, and the second infrared monitor sends alarm information to a computer control system. For safety reasons, a third infrared monitor can also be provided on the platform between the turning device and the circular knitting machine to monitor whether the fabric has been transferred to the turning device.

When knitting a tubular fabric 6 of a general length like a sock of short style:

1) The circular knitting machine 2 well knits the tubular fabric, the transfer disc 31 of the transfer device 3 is driven by the transfer arm to move to the position above the circular needle bed of the circular knitting machine 2, the knitted tubular fabric 6 is moved onto the transfer disc 31, and at the moment, the front side of the tubular fabric 6 faces outwards;

2) After the transfer disc 31 rotates to the position below the semicircular sewing disc of the clamping assembly 12, namely, above the first tubular element 111, the first tubular element 111 of the suction assembly is in a suction state, the solenoid valve is isolated from the atmosphere, and the first tubular element 111 starts to suck the remaining other end of the tubular fabric 6, so that the tubular fabric 6 is completely sucked into the first tubular element 111, as shown in fig. 4;

3) After the first tubular member 111 stops sucking air, the electromagnetic valve is communicated with the atmosphere, the second tubular member 131 above the clamping assembly 12 is in an air sucking state, the tubular fabric 6 is adsorbed, and as one end of the tubular fabric is fixed, the fabric adsorbed into the second tubular member is reverse side outward, as shown in fig. 5, namely, the tubular fabric is turned over once from inside to outside, and the reverse side of the fabric is backward;

4) Subsequently, the platen 119 on the outer side of the first tubular member 111 is moved up, and the floating bridge (tooth piece) on the upper periphery of the platen moves the loops of the end to be sewn of the tubular fabric 6 from the transfer needles of the transfer plate to the needles of the 2 semicircular ring-shaped sewing plates arranged in a circular shape, so that the end to be sewn of the tubular fabric is fixed to the semicircular ring-shaped sewing plates;

5) The pressing plate 119 moves down to the original position after the tubular fabric is transferred, the second infrared monitor starts monitoring, the monitoring range is from the lower part of the clamping plate to the upper part of the first tubular part 111, no fabric exists in the range under normal conditions, and if the fabric exists, an alarm is given; next, the transfer plate 31 leaves the axis of the gripping plate 121 and the first tubular member 111;

6) The 2 semicircular ring sewing disks of the clamping disk 121 are folded with the coils of the tubular fabric in half, after the coils are folded in half, a scraping plate is arranged in the clamping disk, and the scraping plate scrapes the coils of the upper semicircular ring sewing disk onto the sewing needles of the lower semicircular ring sewing disk, so that the coils to be sewn of the tubular fabric are overlapped together; the suturing device 4 then starts suturing;

7) After the fabric is sewn, the folded 2 semicircular ring sewing disks are loosened and restored to be circular, the scraping plates scrape the coils of the tubular fabric out of sewing needles, namely the clamping disks loosen the sewn tubular fabric, the tubular fabric quickly enters the second air suction pipe to the discharge port under the action of the suction force of the second tubular piece 131, the second control valve is quickly interrupted, so that the tubular fabric 6 falls down from the discharge port, and a series of work such as weaving, turning, sewing, discharging and the like of the tubular fabric 6 is completed.

When knitting tubular fabrics of greater length, like stockings:

1) The circular knitting machine 2 weaves the tubular fabric, the transfer disc 31 of the transfer device 3 moves to the upper part of the circular needle bed of the circular knitting machine 2 under the driving of the transfer arm, and the weaved tubular fabric 6 is moved to the transfer disc 31, and at the moment, the front side of the tubular fabric 6 faces outwards;

when the first tubular member 111 sucks air, the first tubular member 111 is driven by the first lifting device, the lifting motor 112 drives the screw rod 113, and the screw rod 113 drives the first tubular member 111 to move up and down for a plurality of times, so that the tubular fabric is completely adsorbed into the first tubular member;

meanwhile, if the second lifting device 15 is arranged outside the article suction assembly, the air cylinder 154 in the second lifting device 15 is controlled to push the movable rod 155 downwards to drive the whole article suction assembly 11 to move downwards, the distance between the article suction assembly 11 and the transfer assembly 12 is increased, tubular fabrics can conveniently enter the first tubular member 111, and after the tubular fabrics smoothly enter the first tubular member 111, the whole article suction assembly 11 can move upwards to the original position for subsequent work;

meanwhile, after the first tubular member 111 stops adsorption work, the first tubular member can be converted into an air blowing state, an air pump connected with the first tubular member 111 is opened, a first control valve in a first air suction pipe rotates to a first end and a second end to be respectively communicated with a third end, so that the first tubular member is further prevented from being difficult to blow in a vacuum state, and the first tubular member 111 blows air to the tubular fabric to assist in overturning the tubular fabric;

5) The pressing plate 119 moves down to the original position after the tubular fabric is transferred, at this time, the second infrared monitor starts to monitor, the monitoring range is from the lower part of the clamping plate to the upper part of the first tubular member 111, no fabric exists in the range under the normal condition, and if the fabric exists, the alarm processing is carried out; then, the transfer disc 31 leaves the axis of the gripping disc 121 and of the first tubular member 111;

Claims

1. A method for sewing tubular fabrics, the adopted device comprises a transfer device, a clamping disk, a turnover device and a sewing device; the transfer device comprises a transfer disc, and the transfer disc is used for taking off the woven tubular fabric and transferring the tubular fabric to a clamping disc for clamping; the clamping disc comprises 2 semi-circular seaming discs which can be folded; the stitching device is positioned on the side surface of the clamping disc; the turnover device comprises a first tubular part and a second tubular part, the first tubular part is coaxially positioned below the clamping disc, and the second tubular part is coaxially fixed above the clamping disc; the first tubular part and the second tubular part are both connected with a negative pressure air source, and the first tubular part is also connected with a positive pressure air source; the side surface of the first tubular part is provided with a first lifting device which drives the first tubular part to move up and down axially, and when the first tubular part is at a lifting position, the top end of the first tubular part is lower than the position of the clamping disc; the method is characterized in that: the method comprises the following steps:

2. A method of seaming a tubular fabric according to claim 1, wherein: during the step b), the first tubular member is driven by the first lifting device to move up and down for a plurality of times, so that the other end of the tubular fabric enters the first tubular member.

3. A method of seaming a tubular fabric according to claim 1, wherein: during step c), the first tubular member is in a positive pressure state, assisting the tubular fabric to evert upwards into the second tubular member.

4. A method of seaming a tubular fabric according to claim 1, wherein: during step c), the first tubular member is moved to the raised position by the first lifting device.

5. A method of seaming a tubular fabric according to claim 1, wherein: during step b), the assembly of the first tubular member and the platen is driven by the second lifting device to move downwards so as to facilitate the entry of the other end of the tubular fabric into the first tubular member, and then the second lifting device drives the assembly to move upwards as a whole to the original position.