TW202041736A - Method and apparatus for producing tubular knitted articles with a closed toe - Google Patents

Abstract

There are described a method and an apparatus for producing tubular knitted articles (10). At the end of knitting of the article there is arranged coaxially to the needle cylinder (220) of the circular machine a pick-up member (300) of the article (10), provided with a plurality of pick-up hooks (100) arranged according to a circular ring (310) divided into two circular half-rings (310a, 310b) of pick-up hooks (100), overturned one onto the other. The tubular knitted article (10) is removed from the needle cylinder (220) by means of the pick-up member (300). The circular half-rings (310a, 310b) are overturned one onto the other to close the toe of the article (10). The pick-up hooks (100) comprise a shank (101) and a latch portion (105) sliding along the longitudinal axis (102) of the pick-up hook to close the hook portion (103).

Description

Method and equipment for manufacturing tubular knitted articles with closed toes

The present invention relates to a method for manufacturing tubular knitted articles (especially stockings and socks) with closed toes.

The invention also relates to a device for implementing this method.

For example, WO2004035894, WO2010086708, WO2014167047, WO2017/067801, WO2014167047, EP0592376, WO2007135697, WO2018011076 disclose various well-known methods and equipment for manufacturing tubular knitted articles with closed toes.

In some of these prior art solutions, a textile picking device is provided, which, after knitting a tubular object on the cylinder of a circular knitting machine, picks up the object with the open toe and transfers it to A suturing/joining machine that automatically performs toe stitching or joining to finally obtain a tubular object with closed toes.

In WO2004035894, a pick-up part of a tubular knitted article coaxially with the needle cylinder is provided, which is provided with an axial pick-up element or tube aligned with the needle cylinder. In this way, each stitch of the last stitch is transferred to the respective pickup element.

The yarn loops are then held on the pick-up element by respective latches for unloading onto the pick-up part, thereby releasing the needle cylinder from the tubular object. The pick-up part is divided into two halves, one of which can be rotated 180° relative to the other half, so that the individual tubes are aligned with each other, and therefore the individual needle loops of the last loop of the tubular object are moved toward each other. In this way, it is possible to close the tubular knitted article outside the circular machine by means of an external stitching or joining machine which joins or stitches the loops of the two halves joined on the tube. By opening the two halves, the tubular object can be unloaded with the toe closed. The disadvantages of this method are the complicated and lengthy joining procedure and the need to manufacture high-precision pick-up components, which must be able to join each stitch of the last stitch.

In WO2010086708, the picking component is provided with a plurality of fixed picking hooks, which penetrate into the needle yarn loop of the last stitch of the tubular object, allowing the yarn loop to be unloaded from the needle of the cylinder, thereby holding the object at the open toe. The pick-up unit then conveys the tubular object to the external stitching or joining machine of the closed toe. Also in this situation, there are disadvantages of complicated connections and the need for high precision of picking parts.

In WO2014167047, the picking component has a plurality of tiltable picking hooks, which are arranged according to a circular ring divided into two circular halves of the hooks, and the two circular halves can be flipped onto each other. The hooks are configured to engage with the tubular knitted article still loaded on the needles of the circular machine by means of rotational movement, so as to pass between the needles to pick up the sinker yarn existing between two adjacent needles Loops and avoid picking up needle loops. The pick-up component may also include a tilt-fixed latch which closes the hook after the hook has engaged the individual sinker yarn loops. After the latch has been closed, the needle loop is unloaded from the needle so that the pick-up member can move, thereby releasing the needle cylinder from the tubular article. Subsequently, the two circular halves of the hooks of the pick-up part are turned over, thereby superimposing the two opposite edges of the toe of the tubular object and allowing the sewing machine to close the toe, thereby joining the two edges to each other. This system is much faster than the system mentioned above without its complexity. However, it still does not allow high-quality suture of the toe.

Therefore, it is necessary to further improve the pick-up device for tubular knitted articles to increase the quality of the final product while maintaining the simplicity of the structure.

Therefore, one object of the present invention is to provide a method for manufacturing a tubular knitted article with a closed toe, which overcomes the shortcomings of the current advanced technology. In detail, one of the objectives of the specific examples disclosed in this article is to provide a method that can achieve maximum accuracy in the step of suturing/attaching toes while maintaining a simple mechanical structure.

In addition, an object of the present invention is to provide a device for implementing this method.

One of the goals of the specific examples disclosed in this article is to provide a device of this type that is less complicated than similar devices currently on the market.

One of the goals of other specific examples is to provide a device of this type that requires minimal maintenance and provides maximum reliability relative to existing equipment.

One goal of some specific examples is also to provide a method and related equipment for manufacturing a tubular knitted article with a closed toe, in which fine joining or stitching of the toe can be implemented.

An object of the present invention is to provide a device for picking up tubular knitted articles made by a circular knitting machine and placing them on a sewing station to implement the method.

According to one aspect, a method for manufacturing a tubular knitted article on a circular knitting machine is provided, the circular knitting machine including a needle cylinder having a circular needle bed. The method first includes a step of knitting a tubular knitted article on the needle cylinder starting from an edge and ending at an open toe. After finishing the knitting of the object and after removing any dial that cooperates with the needle cylinder to knit the object, the method provides a step of arranging a picking member to be coaxial with the needle cylinder, the picking member is provided with A plurality of picking hooks arranged in a ring on one axis of the component. The ring is divided into two circular half-rings of the pick-up hook, which can be turned over to each other and rotate around a radial axis, which is also extended according to the diameter of the ring divided into two half-rings One axis. Each picking hook may include: a handle movably constrained to the picking member, the handle having a longitudinal axis and terminating in a hook portion; and a latch portion having: a rod, the rod The handle constrained to the hook portion in a manner of sliding along the longitudinal axis of the handle; and a head configured to coact with the hook portion of the handle. In addition, the method includes the step of arranging each pick-up hook in a first position spaced apart from the tubular knitted article. In the first position, the head of the latch part keeps the hook part open. Subsequently, the method includes the step of moving each pick-up hook and the latch part integrally to a second position relative to the moving part toward the tubular knitted article, in which each pick-up hook The hook part engages with the tubular knitted article. After performing this step, the rod of each latch part of each picking hook is slid along the longitudinal axis of the handle until the hook part is closed, thereby preventing the tubular knitted article from being picked up The release of the hook. Once the yarn loops are fixed to the hooks in this way, the tubular knitted article is removed from the needle cylinder by means of the pick-up member and the pick-up hooks that engage the tubular knitted article. Once the knitted article is removed from the needle cylinder, the two circular halves of the picking hook are turned over to each other, thereby superimposing the two opposite edges of the toe of the tubular knitted article on each other. After turning over, the two opposite edges are joined to each other by stitching or joining, thereby forming a closed toe. The closing operation by means of stitching or joining is preferably performed in a toe closing machine which is positioned close to the syringe and the pick-up member moves towards the toe closing machine. When the tubular knitted object is still constrained to the picking hooks of the picking component, the toe closing operation is performed. Once the closing of the toe is performed, the tubular object with the closed toe is unloaded from the picking member.

In the case of the method described above, it is possible, for example, to use a rotating or pivoting movement to move each latch part integrally with the hook part of the picking hook. This makes it possible to maintain the control of the loops of the tubular object while simultaneously tightening the yarns that make the tubular knitted object during some steps of the manufacturing process. In detail, it is possible to tighten the end yarn loop of the edge of the toe radially outward during the stitching or joining step. Because the heads of the latch parts pivot and rotate together with the hook parts, the yarn loops engaged by the hook parts of each pick-up hook remain tightly engaged. As will be described below with reference to specific illustrative examples, it is possible to obtain a higher quality toe suture in this way.

In the context of this specification and the scope of the appended application, generally speaking, reference will be made to toe closure operations. Generally speaking, the toe of the knitted article can be closed by joining or sewing. The technology used to implement the closed operation is not binding.

In a particularly advantageous embodiment, the step of moving each pick-up hook toward the tubular object includes the step of inserting each pick-up hook between two consecutive needles of the needle bed to engage a portion of the fabric between the consecutive needles . In a practical example, each pick-up hook engages the sinker loop in this way, that is, the loop formed by the sinker arranged between consecutive (ie adjacent) needles. Therefore, not only the advantages according to the present invention are achieved, but also the advantages related to the prior art method, where at the sinker loops, that is, between successive needles of the circular knitting machine, rather than between the Pick up the tubular object at the needle loop.

In a particularly advantageous embodiment, the step of moving each pick-up hook toward the tubular object includes rotating each pick-up hook and the latch portion integrally with respect to the pick-up member, thereby moving toward the axis of the pick-up member Each step of picking up the hook parts of the hook.

Preferably, the step of rotating each pick-up hook relative to the pick-up component may include the step of rotating each pick-up hook around a rotation axis oriented at 90° with respect to the axis of the pick-up component. This allows the pick-up hook to move radially toward or away from the axis of the pick-up member during the step of picking up the yarn loop and during the step of tightening the yarn loop for sewing/joining, respectively.

As mentioned, because each latch part is rotatably constrained to the hook part, that is, rotates or pivots integrally therewith, it is possible to close the toe (that is, to engage the toe). During the step of two opposite edges of the part), the hook part and the head of the latch part are rotated integrally. The movement is advantageously a radial movement towards the outside with respect to the axis of the pickup member. In this way, the loop portion forming the opposite edge of the toe to be closed is tightened radially toward the outside, thereby promoting stitching or joining and increasing the quality of the final result. In detail, during stitching or joining, by tensioning the last stitch of the toe of the tubular knitted object radially outwards, it is possible for the stitching or joining yarn to join a smaller number of stitches, such as only the last One coil. In this way, a thinner seam is obtained and finally an object of better quality is obtained.

According to another aspect, a picking device is provided for picking up tubular knitted articles from a circular knitting machine including a cylinder with a circular needle bed. In the specific example disclosed in this article, the pick-up device includes a pick-up part, which is provided with a plurality of pick-up hooks, and the plurality of pick-up hooks are divided into two circular halves of the pick-up hooks that can be flipped onto each other according to the A ring of the ring is arranged around an axis of the picking member.

The ring may include a circular support, and the picking hooks are constrained on the circular support. In addition, the circular support may be divided into two semicircular parts, the two semicircular parts are hingedly connected to each other around an axis that is substantially orthogonal to the axis of the pickup member and is radially relative to the ring . Each picking hook may include a handle having a longitudinal axis, terminating in a hook portion, and movably constrained to the picking component.

In detail, each picking hook is movably constrained to the circular support of the ring. In addition, the pick-up component may include: a handling device that moves the pick-up component between at least two operating positions; and a turning device that turns the circular half-rings of the pick-up hook onto each other. In addition, a pickup hook driving device is provided, which moves each pickup hook relative to the axis of the pickup component so as to move the hook portions of the pickup hooks radially toward the axis of the pickup component and the like The hook part moves away from the axis of the pick-up component.

In the advantageous embodiments disclosed herein, each pick-up hook may include a latch part having a rod that slides along the longitudinal axis of the pick-up hook and a head that cooperates with the hook part unit. In addition, a control device may be advantageously provided to slide each latch part along the handle of the respective pick-up hook between a first position and a second position. In the first position, the head The part keeps the hook part open, and in the second position, the head closes the hook part to hold the tubular knitted article.

In this way, each latch portion is constrained to the handle and the hook portion of the picking hook so as to integrally participate in the movement of the hook portion toward the axis of the picking member in the radial direction and self The movement away from the axis of the pickup component. At the same time, the latch part can move relative to the hook part, and a movement is substantially parallel to the longitudinal axis of the handle of the picking hook so as to be able to move to an open position and a closed position instead. In the first open position, the head of the latch portion idles the hook portion so that it can engage the tubular knitted article by moving radially toward one of the axes of the pickup member. In the second closed position, the head of the latch part closes the hook part so that the part of the yarn engaged by the hook part remains constrained to the hook part even if the pick-up hook is from the pick-up hook The axis of the component is moved away radially, for example to tighten the loops of the tubular knitted article radially towards the outside.

Each picking hook can be provided with a radial translational movement relative to the picking component. However, in a preferred embodiment, the movement of the picking hook and especially the hook portion radially toward and away from the axis of the picking member is a rotational movement so as to be radial Moving the hook portion toward and away from the axis of the picking component toward and away from the axis of the picking component, the latch portion moves integrally with the picking hook during the rotational movement. The rotation may be performed around an axis oriented substantially at 90° with respect to the axis of the pick-up component, and the pick-up hooks are arranged around the axis of the pick-up component.

In a possible specific example, the handle of each picking hook may have a layered shape and may have at least one protrusion or a slot, and the lever of the latch part may have the protrusion of the handle therein The part is engaged by at least one slot of sliding engagement, or a protrusion engaged in the slot of the handle. In the case of this specific example, a picking hook that has a finite thickness and is therefore suitable for cooperation with a barrel with extremely fine needles is obtained.

In other specific examples, the handle of each pick-up hook may be box-shaped and the rod containing the corresponding latch part accommodates one of the internal sliding seats. In this way, a stronger structure and better guidance of the latch part of the handle relative to the picking hook is obtained.

In order to obtain easier coupling of the pick-up hook to the ring and therefore ultimately to the pick-up component, in a particularly advantageous embodiment, the handle of each pick-up hook may have a fixing or anchoring part to The picking hook is movably constrained to the picking component. The fixing part may include two mutually complementary elements, which form a coupling seat, which is, for example, substantially circular in shape. The two elements can be elastically deformed to open and close the seat. For this purpose, at least one of the two elements or both of these elements can be manufactured by means of a part of an elastically flexible plate. The portion of the elastically flexible plate can be obtained by cutting or shearing from a sheet of the handle forming the respective pick-up hooks.

According to another aspect, a system for manufacturing tubular knitted articles is described herein, which in combination includes: A circular knitting machine with a needle cylinder including a circular needle bed; Pickup device as defined above; A machine equipped with stitching or connecting needles for closing two opposite yarn loop edges of a toe of the tubular object.

According to a particularly advantageous specific example, the pick-up hooks are configured and configured to be inserted between two adjacent needles of the circular needle bed, and in this way engage the circular needle of the knitting machine The sinker yarn loop of the tubular knitted article manufactured by the bed.

The present invention also relates to a method for manufacturing a tubular knitted article on a circular knitting machine for knitting tubular knitted articles, the circular knitting machine including a needle cylinder with a circular needle bed. The method includes the following steps: knitting the tubular object starting from an edge and ending at an open toe; and then arranging a picking member with a plurality of picking hooks to be coaxial with the needle cylinder, the plurality of picking hooks The configuration is based on a circular ring divided into two circular half-rings flipped to each other. By means of the plurality of pick-up hooks, the loop part of the tubular object is then engaged by means of the pick-up member and removed from the needle cylinder. Next, the circular half-loop of the picking hook is turned over, so that the two opposite edges of the toe portion of the tubular knitted article are superimposed on each other and the two opposite edges are joined to each other by means of a joining or sewing step, and thereafter Unload the tubular object with closed toes.

The method has the following characteristics: the pick-up hooks include a handle having a longitudinal axis, terminate in a hook portion and are fixed to the pick-up component by means of a fixing portion, and the pick-up hooks include a latch Part, which has a rod that slides along the longitudinal axis on the hook part, the latch part has a head on the same side as the hook part and a part on the opposite part of the head One tail.

In addition, it has the following feature: the step of joining the tubular knitted article by means of the plurality of pick-up hooks may include: Disposing the latch part of each pick-up hook in a first position, in which the head keeps the hook part open; Move the pick-up component towards the tubular knitted article until the hook portion of each of the pick-up hooks is coupled to the tubular knitted article, Push the latch part of each pick-up hook to slide the rod along the longitudinal axis of the handle to a second position, in which the head closes the hook part, thereby preventing the tubular The knitted object is released from the picking hooks.

Finally, the method has the following feature: the step of joining includes a step of elongating the yarn loop parts by means of integral rotation of the picking hooks and the latch parts.

This method solves the problem of uncertainty in the stitching of the suture needle that occurs in the step of closing the toe. In fact, the integrated rotation of the picking hook and the latch widens the yarn loop and leaves ample space for the stitching needle. This solution is impossible in the prior art, in which the latch does not slide on the picking component and does not slide on the picking hook, and therefore cannot rotate together with the picking hook, making the picking hook impossible Any movement to widen the yarn loop.

Preferably, the step of moving the pickup member toward the tubular knitted article until the hook portion of each of the pickup hooks is coupled to the tubular knitted article includes making the pickup hooks and the latch The step of rotating partly into the first position.

In a possible specific example of the method, a picking hook is provided obliquely every two needles of the circular machine on the picking component, and the picking hooks have a cross-sectional dimension larger than that between adjacent needles. One of the front sections of the distance. The picking hooks are inserted between several pairs of alternating needles, which increases the distance between the pairs of needles that penetrate the picking hooks and reduces the distance between the pairs of needles that do not penetrate the picking hooks . In this way, the step of closing the toe is implemented using fine stitching/joining and double pitch.

According to another aspect of the present invention, there is provided an apparatus for manufacturing tubular knitted articles, which is configured to operate in association with a circular knitting machine, the circular knitting machine having a circular needle bed Needle cylinder, the circular knitting machine is used to knit the tubular knitted articles starting from an edge and ending at an open toe. The equipment contains: A pickup device, which includes A pick-up part configured to be coaxially arranged with the needle cylinder in a first station, the pick-up part is provided with a plurality of pick-up hooks, and the plurality of pick-up hooks are divided into pick-up hooks that are turned over to each other according to division One of the two circular half-rings is configured in a circular ring, and the plurality of picking hooks are configured to engage the part of the yarn loop of the tubular object in the picking station; A lifting and rotating device for taking the pick-up component from the first stage to a second stage, so as to remove the tubular knitted article from the needle cylinder by means of the pick-up component; A reversing device for reversing one of the circular half-rings of the picking hook of the picking component, and superimposing the two opposite edges of the toe of the tubular knitted article on each other; A joining or sewing device configured to join two opposing yarn loop edges to each other by means of a joining or sewing operation; An unloading device configured to unload the tubular object with closed toes after the joining or sewing operation is completed.

The feature of the device is that the pick-up hooks include: A handle having a longitudinal axis and terminating in a hook portion, wherein the handle is fixed to the picking member by means of a fixing portion, And a latch part having a rod that slides along the longitudinal axis on the hook part, the latch part having a head on the same side as the hook part and a head opposite to the head One of the tails on the side, The device is characterized in that the device further includes a driving device of the picking hooks, which is used to rotate the picking hooks around the driving part and in which the head keeps the hook part open in a first position and Wherein the head closes the hook portion to prevent the tubular knitted article from sliding the latch portion in each picking hook between a second position released from the picking hooks, the picking hooks The driving device is configured to rotate the pick-up hooks and the latch parts integrally to extend the yarn loop part in the second station during the joining or sewing operation.

This type of equipment makes it possible to provide the methods indicated above to achieve the aforementioned goals.

In a variant of the device, the picking part is provided with a picking hook obliquely every two needles of the circular machine, and the picking hooks have a front section with a lateral dimension greater than the distance between adjacent needles .

In this way, the picking hooks are inserted between the pairs of alternating needles, which increases the distance between the pairs of needles that penetrate the picking hooks and reduces the pairs of needles that do not penetrate the picking hooks. the distance between. This makes it possible to obtain stitches that are closer to the pitch of the needle to perform fine joining or stitching.

FIG. 1 shows in a partial section on a vertical plane an apparatus according to a specific example of the present invention, which includes a circular knitting machine 200 in the step of completing the knitting of a tubular knitted article 10.

In a known manner, the machine 200 performs the knitting process of the tubular object 10, which starts with the formation of the edge 20 usually using elastic yarn and ends with the formation of the last loop 30.

In the object of the present invention, the last stitch 30 and some of the stitches formed immediately before the last stitch (for example, the second to last stitch, the third to last stitch, and the fourth to last stitch) form the tubular knitted article 10 The final end edge 31 must be stitched or joined to form a closed toe, such as the toe of the foot of stockings or socks.

As in the prior art, the circular machine 200 includes a jack 230, a needle cylinder 220, a control cam 215, and an actuator 240 to perform the reciprocating vertical movement of the needle 210. In the needle cylinder, the needle 210 of the circular needle bed Engage in a sliding manner.

In addition, the circular machine 200 cooperates with the dial 250 coaxial with the axis of rotation 201 of the needle cylinder 220 and cooperates with the yarn guide 400, which is more visible in FIG. 1A, which feeds the yarn 410 to the needle 210 to align the tube The knitted article 10 is knitted.

A sinker 225 is arranged between the needles 210, which is composed of a plurality of thin plates, which are designated to cooperate with the needles 210 to form the loops of the tubular knitted article 10. Again, as shown in Figure 1, after the circular knitting is completed, the last stitch 30 of the tubular knitted article 10 is joined on the circular needle bed 210 of the needle cylinder 220, and the dial 250 starts to be relative to the circular needle bed. 210 rose. Known to those with ordinary knowledge in the technical field, these devices and their operations are not described in further detail.

FIG. 1B shows, as an example, a top view of a part of the final end edge 31 of the tubular knitted article 10 after the knitting is completed in the step in which the needle 210 is still engaged in the last stitch of the yarn loop 30. The yarn loop 30 is referred to herein as a needle yarn loop, and the adjacent pairs of the needle yarn loop 30 are joined by individual sinker yarn loops by joining parts or yarns of the needle yarn loops. Loops are formed, and the needle yarn loops are engaged with the continuous needles 210, that is, adjacent to each other in the circular needle bed.

After completing the knitting of the tubular object 10, the yarn guide 400 is lifted in the direction indicated by the arrow 401 shown in FIGS. 2 and 3, and the yarn guides are shown on the dial in the direction indicated by the arrow 251 The further lifting of 250 creates space and allows (see FIG. 4) the lifting of the tubular knitted article 10 on the needle 210, for example by means of a tube 205, which is arranged inside the needle cylinder 220 and is movably coaxial with respect to it. In this step, the needle loop 30 remains engaged with each pin 210 without being unloaded. In order to protect the tubular knitted article 10 from jamming in the knitted part and in particular the needle 210 and the sinker 225, the tube 205 is positioned coaxially with the barrel 220 and includes an open upper edge 206. The tube 205 is then lifted so that its upper edge 206 is above the ring of sinker 225. In order to allow the pipe 205 to be lifted over the sinker 225, a groove not shown in the figure may be provided on the upper edge 206 of the pipe 205 for passing on the sinker 225.

In detail, as shown in FIG. 4, a specific example of the apparatus according to the present invention includes the picking component 300 described in more detail below. In FIG. 4, the pickup member 300 is divided in a vertical plane different from the vertical plane of the yarn guide 400. The pick-up component 300 is a part of the pick-up device 318, which can be rotated around an axis 301 between at least two positions opposite to each other in a cantilever manner, as described below.

As shown in FIG. 5, when the needle 210 of the circular needle bed is still in the raised position to hold the tubular knitted article 10 in this position, the picking member 300 rotates around the axis 301 and reaches the needle cylinder 220 and the tubular knitted The coaxial position of the object 10. This movement is made possible by the rotation of the entire pickup device 318 around the axis 301 (arrow 304), until the pickup part 300 reaches the coaxial position on the needle cylinder 220, which is in the empty space due to the previously raised dial 250 internal.

In detail, the rotation of the pickup member 300 around the axis 301 according to the arrow 304 is made possible by the drive member 350, which in addition to allowing the aforementioned rotation about the axis 301, also enables the shaft 354 to be raised or lowered axially , As described below.

The picking component 300 includes a circular support 310 which is divided into two semi-supports, and the two semi-supports form two circular semi-rings 310 a and 310 b of the picking hook 100. The two circular half-rings 310a, 310b can be turned around the pivot 305 onto each other. The two half-rings 310a, 310b are concentric with respect to the axis 315 of the picking member 300 when they are configured to be approximately coplanar to form a circular support. The pivot 305 defines a tilt axis that is substantially orthogonal to the axis 315 of the pick-up member 300, and the pick-up hooks 100 visible in the magnification of FIG. 5A are distributed around this axis. Each picking hook 100 is constrained to the corresponding connecting part 308 by means of the fixing part 104, and each picking hook 100 is fixed to the picking part 300 by the corresponding connecting part. The constraint between the pick-up hook 100 and the pick-up part 300 allows each pick-up hook 100 to rotate relative to the axis of rotation 302 (see especially FIG. 8A ), which is oriented substantially 90° with respect to the axis 315 of the pick-up part 300. In detail, the rotation axis of the picking hook 100 of FIG. 5A is substantially orthogonal to the plane of FIG. 5A. Each picking hook 100 has its own horizontal rotation axis 302 which is different from the axis of other picking hooks 100. The rotation axes 302 are formed by straight lines tangent to the circumference coaxial with the pickup member 300.

For example, the constraint between each picking hook 100 and the respective circular half-rings 310a, 310b can be obtained in a known manner from WO2017067801. Figures 5B and 5C show implementation details of specific examples. Along the semicircular extension of each half ring 310a, 310b, the groove 311 is provided along a radial plane (that is, a plane containing the axis 315 of the pickup member 300). Each circular half ring 310 a, 310 b is provided with a semi-annular recess 312 (FIG. 5B ), which extends around the axis 315 of the pickup member 300. The above-mentioned position of the groove relative to the axis 315 is the position used when the circular half-rings 310a and 310b are positioned to be coplanar (Figure 4 and Figure 5). The assembly of the picking hook 100 is by inserting a wire with a circular section or a coil spring (indicated by 308 in FIG. 5C) into the recess 312 and then coupling each picking hook 100 with its fixed portion 104 To the wire or coil spring 308.

Specific examples of the picking hook 100 according to the present invention are illustrated in FIGS. 6, 6A, 6B, 6C, and 6D. The picking hook 100 includes a handle 101 which has a longitudinal axis 102 and terminates in a hook portion 103.

The handle 101 includes a fixing portion 104, which fits in the connecting portion 308 of the picking member 300 of FIG. 5A, for example, by a snap, that is, is coupled by a snap to a wire or wire having a circular section received in the recess 312 Spring (Figure 5B, Figure 5C). In detail, the fixed portion 104 may be formed by elastically connecting to the two opposite halves 104a, 104b of the handle 101 in a cantilever manner. This facilitates the insertion and removal of the picking hook 100 into and removing the picking hook 100 from the connection portion 308 formed by the spring or wire of FIG. 5C of the picking member 300 in the case of maintenance or replacement operations, while ensuring the surrounding Minimum rotational friction of the connecting part 308.

The picking hook 100 further includes a latch portion 105 having a rod 106 which is constrained to the handle 101 by a pair of prisms (that is, a sliding pair) so as to be able to be relative to the handle along the longitudinal axis 102 (that is, parallel to the longitudinal direction) Axis 102) sliding. The latch portion 105 may have a tail or tip 107 at one end and may have a head 108 at the opposite end, which is located on the same side as the hook portion 103 and is configured to close the hook portion 103 for Block the yarn loop part on the picking hook 100 as described below. In other specific examples, the tail or end 107 may be disposed in an intermediate position along the longitudinal extension of the rod 106 and may have a shape different from the shape shown in FIGS. 6 to 6D.

In FIGS. 5 and 5A, the latch portion 105 of the picking hook 100 is shown in the first position. In the first position, the head 108 is spaced apart from the end of the hook of the hook portion 103 and the hook The hook portion 103 remains open. In addition, each pick-up hook 100 is in a dispersed position, that is, where the head 108 of the latch portion 105 and the hook portion 103 are radially spaced apart with respect to the axis 315 of the pick-up member 300. In this way, the pick-up hook 100 prepares to approach the tubular knitted article 10 in the manner shown in FIGS. 7 and 7A, wherein the pick-up member 300 is positioned coaxially with the axis of rotation 201 of the needle cylinder 220 and then faces the needle according to the arrow 365 The tubular knitted article 10 lifted on 210 moves vertically downward.

In some specific examples, such as the specific example shown in the enlargement of FIG. 7A, the pick-up member 300 may include a tubular element 320 mounted on a circular support 310 to align the loop of the last loop of the tubular knitted article 10 On a plane substantially orthogonal to the axis of rotation 201 of the barrel 220 of the circular machine 200 (FIG. 7). This makes it easier to capture the tubular knitted article 10 by picking up the hook 100.

As shown in Figures 8 and 8A, after having approached the tubular knitted article 10, the picking hook 100 is rotated about its respective axis of rotation 302 by means of an actuator 331, which is part of the drive assembly 330 and Move in the direction of arrow 335.

In detail, each of the picking hooks 100 rotates around its own rotation axis 302, and moves the hook portion 103 (lower end portion), starting from the first position radially farthest from the axis 315 of the picking member (FIG. 8C), Towards the axis of rotation 201 of the barrel 220 (Fig. 8D) and towards the axis 315 of the pick-up member rotating as indicated by arrow 216 (Fig. 8D), thus reaching the axis 315 shown in Fig. 8A which is radially closer to the pick-up member In the second position, each hook portion 103 engages the tubular knitted article 10.

As can be seen in FIG. 8B, the picking hook 100 of the picking component 300 is staggered with respect to the needle 210 of the barrel 220. In this way, according to the arrow 216 (FIG. 8D) to rotate around the respective axis of rotation 302 (FIG. 8A), each pick-up hook 100 is inserted between two adjacent (ie continuous) needles 210 and each The hook portion 103 engages the edge 31 (Figure 8B). In detail, the hook portion 103 engages the loop portion 32 visible in FIG. 8B, that is, the sinker loop, which is located between two adjacent needles 210. The latch part 105 is constrained to the remaining part of the picking hook 100 so as to rotate integrally with the remaining part about the rotation axis 302. In essence, two components that can slide relative to each other in the direction of the longitudinal axis 102 are constrained to rotate together about the longitudinal axis 102 with each other.

As shown in FIGS. 9 and 9A, in order to block the yarn loop engaged by the hook portion 103 of each picking hook 100, the latch portion 105 is provided by an actuator 340 mounted on the picking member 300 (FIG. 9A ) Push in the direction indicated by arrow 336 so that the handle 106 of the latch portion 105 slides parallel to the axis 102 (see also FIG. 6B). In this way, the head 108 of each latch portion 105 closes the hook portion 103, thereby trapping therein the yarn loop portion 32 engaged with the hook portion (FIG. 9A). The sliding movement of the latch portion 105 along the axis 102 of the picking hook is controlled by an actuator 340 acting on the end portion 107.

At this time, starting from the position of FIG. 9 and FIG. 9A, as shown in FIG. 9B and FIG. 9C, each needle yarn loop (suture) is unloaded by each needle 210 forming the needle yarn loop. For this purpose, in a known manner, each needle 210 first travels upward as indicated by the arrow 217 of FIG. 9B until the needle latch 211 of the needle 210 moves beyond the individual yarn turns of the last stitch 30, and then as As indicated by the arrow 218 in Figure 9C, travel downwards, so that the needle latch 211 pivots upward, rests on the hook of the needle 210 and closes the hook, thereby allowing the needle to be drawn downward from the last stitch formed . By performing this operation for each of the needles 210, the last stitch of the suture is completely unloaded from the needle 210 and transferred to the picking hook 100. In this way, the tubular knitted article 10 is kept engaged only to the pickup member 300 by means of each pickup hook 100.

The aforementioned movement of the rotation of the picking hook 100 of FIG. 8D, the closing of the latch 105 of FIG. 9A, and the unloading of the yarn loops or sutures of FIGS. 9B and 9C are surrounded by the circular machine 200 around the axis 201 and the picking member 300 The axis 315 is gradually and synchronously indexed and rotated (Figure 9).

In other specific examples, these movements may also occur at the same time.

As shown in FIG. 10, once the tubular knitted article 10 has been engaged by the two half loops 310 a, 310 b of the picking hook 100, the picking member 300 together with the tubular knitted article 10 is lifted by the drive assembly 350 according to the arrow 303.

Next, as shown in FIGS. 11 and 11A, the picking member 300 rotates around the axis 301 by an angle 304 (for example, between 120° and 180°) in a cantilever manner, thereby completely removing the tubular knitted article 10 from the needle cylinder 220 .

In a possible specific example, the suction tube 360 is arranged above the picking member 300, so that by means of air suction 361, the tubular knitted article 10 is pulled upward (FIG. 12) and turned over to carry the elastic edge 20 upward, and At the bottom, the end edge 31 is held by the picking hook 100.

Referring again to FIG. 12, by advancing the actuator 332 of the drive assembly 330, the picking hook 100 rotates to the unfolded position again to perform the reverse movement with respect to FIG. 8D, but the latch 105 (which is connected to each The hook portion 103 of the picking hook 100 rotates integrally) and is maintained in the closed position of FIG. 9A. The rotation has been performed around the fixed part 104 and the axis of rotation 302 (FIG. 8A), so that the hook end portion 103 of each picking hook 100 moves away from the axis 315 of the picking part 300, thereby widening the edge 31 to facilitate stitching, as follows Described. The aforementioned rotational movement of the picking hook 100 is performed in sequence according to the corresponding indexing movement of the picking member 300 around the axis 315.

Next, as shown in FIG. 13, in order to perform the toe stitching or joining (or more generally closing), the half ring 310a of the picking hook 100 is attached to a pivot 305 (which may be a motorized pivot, for example) The rotation is turned 180° until it is superimposed on the half ring 310b. In this way, the half loops 310a and 310b of the picking hook 100 are opposed to each other; the respective yarn loop portions 32 and edge stitches 31 are maintained slender by the above-described rotation of the picking hook 100, and the hook portions 103 With this rotation, it moves away from the axis of the pick-up member 300 in the radial direction.

According to one of the aspects of the present invention, after integrally rotating and moving to a position separated from the picking hook 100 and the latch portion 105, it is possible to keep the edge yarn loop or the stitch 31 widened and make the catch The hook portion remains closed so that the loop or suture remains engaged in the picking hook 100. The provision of the latch portion 105 that remains integral with the hook 100 so as to rotate with it about the rotation axis 302 is therefore particularly advantageous relative to the prior art. In fact, by rotating the pick-up hook 100 to extend the loop portion 32, the quality of the stitching used to close the toe of the tubular knitted article 10 is greatly improved, as explained below. In the prior art solution in which other parts are used to close the picking hook to pick up the object, this rotation will be impossible, because the hook part will lose the yarn loop or stitch.

As shown in Figure 14, Figure 14A, Figure 14B, Figure 14C, the closure of the toe is therefore possible, wherein the closure device 500, such as a connecting or suture device with a curved needle 505, is adjacent to the picking hooks 100 positioned opposite to each other The two half rings 310a, 310b are placed. The curved needle 505 therefore performs stitching/joining, and the picking part 300 performs a synchronous indexing rotation about its axis 315.

In this step, the actuators 332 and 333 maintain the unfolded angular position of the picking hook 100 around the rotation axis 302, thereby widening the yarn loop portion 32 held by the respective half-rings 310a, 310b as much as possible to obtain two The edges of the yarn loops are fully stitched/connected to each other along the half circumference of the two opposite half loops 310a, 310b of the picking hook 100.

In this step, according to two possible alternative variants of the specific example, the picking hook 100 may have been opened in the previous step before the two opposite half-rings 310a, 310b of the picking hook 100 are closed, or may be The half ring is closed after it is closed.

In the second situation, by means of the actions of the actuators 332 and 333, the picking hook 100 performs a pivotal opening and closing movement along the vertical plane synchronized with the stitching movement of the needle 505 around the rotation axis 506 (Figure 14B) (See Figure 14D) to allow the toe of the tubular knitted article to be closed along the arc defined by the half-loop of the hook.

It must be emphasized that in both cases, since each hook portion 103 is closed by the latch portion 105, there is no risk of the elongated yarn loop detaching from the pick-up hook 100 during the stitching/attaching toe step This is guaranteed by the fact that during the rotation of each pick-up hook 100 around the respective fixed portion 104 and the rotation axis 302, the respective latch portion 105 also rotates integrally with the respective pick-up hook 100 around the rotation axis 302 .

After the toe portion of the tubular article 10 is closed, for example, by stitching or joining, the two half-rings 310a, 310b are still facing each other and the tubular knitted article 10 is held upward by air suction 361. In order to release the tubular object 10 with closed toes from the pick-up member 300 and be able to be pulled upward by suction, the pick-up hook 100 performs two consecutive operations to release the yarn loop, as described below.

The first operation shown in FIGS. 15 and 15A involves the action of the actuators 343, which push the end 107 of the picking hook 100 of the single half ring 310b by means of the cam 344, thereby lifting the latch 105之头108。 The unloading of the tubular knitted article 10 with closed toes is therefore unloaded from the picking hook 100 of the half ring 310b of the picking hook 100. This operation is performed by using the support 310 to move around the axis 315 at the same time.

Then, as shown in FIG. 16, by rotating the pivot 305 according to the angle 306 of 180°, the two half-rings 310a, 310b of the picking hook 100 are returned to the coplanar position by reverse rotation. Then, since the half-loop 310b of the picking hook 100 has been released from the yarn loop or suture (Figure 15A), and the half-loop 310a of the picking hook 100 still has the latch 105 in the closed position, the tubular knitted article 10 The closed edge 31 follows the half ring 310a of the picking hook 100.

In order to release the tubular knitted article 10 from the half ring 310a of the picking hook 100 by means of the cam 344, as shown in FIG. 16A, the actuator 343 selectively pushes the end of the latch 105 of the single half ring 310a upward according to the arrow 343 The portion 107 causes the head 108 of the latch 105 to lift in this way, thereby obtaining the unloading of the tubular knitted article 10 with closed toes from the picking hook 100 for the half ring 310a. This operation is also implemented by using the support 310 to move around the axis 315 at the same time.

The indexing rotation of the pick-up member 300 around the axis 315 is made possible, for example, by the drive member 350, which rotates around the pivot 355 mounted on the toothed belt wheel 356 and the rotating shaft 354 (not shown in this figure). The toothed belt wheel is adapted to drive a conveyor belt 357 connected to the picking part 300 (Figure 16).

Figures 17 to 19 show a series of possible steps for unloading the tubular knitted article 10 with closed toes obtained by lowering the suction tube 360, positioned coaxially with the tubular knitted article 10 and having a smaller outer diameter. The tube penetrates and moves to approach the outer surface of the picking part 300. After the air is sucked 361, the stitched toe is first lifted, resulting in a sharp point due to the pressure difference between the inside and outside of the suction tube, until the tubular knitted article 10 exiting from the suction tube 360 is completely turned over.

20, 20A, and 20B illustrate another specific example of the picking hook 100. In this situation, similar to what was described for the picking hook 100 of FIGS. 6 to 6D, the picking hook includes a handle 101 having a longitudinal axis 102 and terminating in a hook portion 103. The handle 101 includes a fixing part 104 by which the picking hook 100 is fixed to the half-rings 310 a and 310 b, and has the possibility of rotating around a respective rotation axis 302. In detail, the fixed portion 104 may be formed by elastically connecting to the two opposite halves 104a, 104b of the handle 101 in a cantilever manner. The picking hook 100 further includes a latch portion 105 having a rod 106 that slides on the hook portion 103 along the longitudinal axis 102. The latch portion 105 may have a tip 107 at one end and may have a head 108 at the opposite end, which is located on the same side as the hook portion 103 and is configured to close the hook portion 103 for blocking Pick up the yarn loop or suture part in the hook 100. In this embodiment, the handle 101 may have a laminar shape with protrusions 101b generated by pulling, for example, and the protrusions are configured to engage the grooved portion 106b of the rod 106 in a sliding manner. As in the specific example previously described, also in this situation, the connection between the two components of the picking hook 100 allows the latch part 105 to rotate integrally with the handle 101 and the hook part 103, but can be relatively The handle and the hook portion slide parallel to the longitudinal axis 102 of the picking hook 101.

Similar to one of FIGS. 20 to 20B, FIGS. 21, 21A, and 21B illustrate another specific example of the picking hook 100. Reference numeral 101c indicates a protruding portion configured to engage the groove portion 106c of the rod 106 in a sliding manner, which is produced by stamping and bending the sheet material forming the element 101.

22 to 22A illustrate another specific example of the picking hook 100, in which the handle 101 may be box-shaped and includes an internal sliding seat 101a for the rod 106 of the latch portion 105. Although this solution is not as substantial as previous solutions, it has the advantage of protecting the latch 105 inside the handle 101.

FIGS. 23 and 24 show a modified specific example of the present invention, in which the hook portion 103 of the picking hook 100 has a front area facing the axis 315 of the picking member 310. The front area has a tapered shape, where the maximum lateral dimension 224 is greater than the distance 226 between adjacent needles. In detail, the figures show a two-step sequence of moving the picking hook 100 toward the needle 210 and inserting therebetween. In detail, the picking hooks 100 inserted between adjacent pairs of needles 210 reduce the distance 226, in this way, it is possible to obtain finer stitching and double pitch in the joining or stitching step. This variant has the advantage that there are fewer picking hooks than needles and therefore a simpler structure.

25 to 25C show a specific example of the picking hook 100, which has been adapted to obtain the stitching or connection as described in FIGS. 23 to 24. In this situation, similar to the content described for the picking hook 100 of FIGS. 6 to 6D, the picking hook includes a handle 101 having a longitudinal axis 102 and terminating in a hook portion 103, wherein the handle 101 includes a fixed portion 104. In detail, the fixed portion 104 may be formed by elastically connecting to the two opposite halves 104a, 104b of the handle 101 in a cantilever manner. The picking hook 100 further includes a latch portion 105 having a rod 106 that slides on the hook portion 103 along the longitudinal axis 102. The latch portion 105 may have a tail or tip 107 at one end and may have a head 108 at the other end, which is on the same side as the hook portion 103 and is configured to close the hook portion 103 In order to block the yarn loop or suture part on the picking hook 100. The part of FIG. 25B shows the larger size 224 of the picking hook 100 and the section with the tapered geometry of the hook portion 103 to facilitate access between 210.

Although the present invention has been described based on various specific specific examples, it will be obvious to those with ordinary knowledge in the technical field that various modifications, changes and omissions are possible without departing from the spirit and scope of the patent application. In addition, unless otherwise specified, the order or sequence of any process step or method may be changed or reconfigured according to alternative specific examples.

no

Other features and/or advantages of the present invention will be more obvious from the following description of its specific examples, which are provided as non-limiting examples with reference to the accompanying drawings, in which: [Figure 1] Shows a cross-sectional view according to the vertical plane of the circular knitting machine in the step of knitting the tubular knitted fabric; [Figure 1A] shows an enlargement of a part of Figure 1, which illustrates the needle, the yarn guide with the associated yarn, the tubular knitted article, the sinker, and the most terminal edge of the tubular knitted article; [Figure 1B] shows the final stitch after the knitting step is completed; [Fig. 2] and [Fig. 3] show the vertical section of the circular knitting machine during the step of lifting the dial and the yarn guide from the circular needle bed to leave space for the pick-up part; [Fig. 4] and [Fig. 5] schematically show the arrival sequence and arrangement of the pick-up part of the tubular knitted article coaxial with the needle cylinder and above the needle bed; [Figure 5A] Shows a magnification of a part of Figure 5, where the picking hooks in an open configuration are visible; [Fig. 5B] and [Fig. 5C] show the enlargement of the practical implementation of the restriction between the picking hook and the picking part; [Fig. 6] to [Fig. 6D] schematically show possible specific examples of the picking hook according to the present invention as in Fig. 5A, respectively showing a side view and an open position (Fig. 6), a plan view according to the arrow VIA (Figure 6A), side view and closed position (Figure 6B) and its components (Figure 6C, Figure 6D); [Figure 7] Schematically show the steps of positioning the pick-up component coaxially with the needle cylinder and positioned at the height of the yarn loop to engage with the pick-up hook; [Fig. 7A] shows an enlargement of a part of Fig. 7, which illustrates the picking hook in an open configuration arranged close to the knitted component; [Figure 8] Schematically show the picking step after the picking hook is rotated around the respective rotation axis; [Figure 8A] shows an enlargement of a part of Figure 8; [FIG. 8B] and [FIG. 8C] respectively show the position of the pick-up hook before the step of threading the loop of the tubular knitted object in a cross-sectional view and a plan view; [Figure 8D] shows the steps of picking up hooks to rotate around respective rotation axes to engage coils; [Figure 9] Shows the steps of unloading the yarn loop from the needle after closing the picking hook; [Figure 9A] shows an enlargement of a part of Figure 9 with the latch closing the hook; [Figure 9B] and [Figure 9C] respectively show the lifting of the needle and the steps of unloading the tubular knitted object from the cylinder by lowering the needle; [Figure 10] Schematically show the steps of lifting a tubular knitted article by means of a picking member; [FIG. 11] and [FIG. 11A] In front view and plan view, the pick-up member rotates and moves around its axis of rotation to perform the removal of the tubular knitted article by means of the pick-up hook and the positioning in the toe stitching table; [Figure 12] Schematically show the steps of inverting the tubular knitted article in the toe suture station with the aid of a suction tube; [Figure 13] Schematically shows the step of turning over one of the half loops of the picking hook so as to superimpose two opposite edges of the tubular knitted article on each other; [FIG. 14], [FIG. 14A], [FIG. 14B], [FIG. 14C] respectively show a cross-sectional view of the equipment in the toe-closing station in the step of joining the opposite edges of the tubular knitted article by means of joining or stitching, and the picking part Partial plan view and two zooms; [Figure 14D] A cross-sectional view showing the step of closing the toe, in which the yarn loop is extended by the hook; [Figure 15] Shows the steps of completing stitching and picking up the hook head from the loop; [Figure 15A] shows an enlargement of a part of Figure 15, which better illustrates the opening of the half-ring latch to release the yarn loop; [Figure 16] Shows the steps of inverting the half loop of the picking hook and unloading the tubular knitted object from the picking hook; [Figure 16A] shows an enlarged part of Figure 16; [FIG. 17], [FIG. 18], [FIG. 19] show the sequence of unloading and removing the tubular knitted object with closed toe from the picking hook after the step of joining two opposite edges is completed; [FIG. 20], [FIG. 20A], [FIG. 20B] schematically show possible variations of specific examples of the pick-up hook according to the present invention in a side view, a longitudinal cross-sectional view according to arrow XKA, and an exploded view; [FIG. 21], [FIG. 21A], [FIG. 21B] schematically show another possible modification of the pick-up hook according to the present invention in a side view, a longitudinal sectional view according to the arrow XXIA, and an exploded view; [FIG. 22], [FIG. 22A] A side view and a cross-sectional view according to arrow XXIIA schematically show another possible modification of the specific example of the pick-up hook according to the present invention; [Figure 23], [Figure 24] shows a modification of the specific example of the picking hook described in the step of inserting between the needles; [FIG. 25], [FIG. 25A], [FIG. 25B], [FIG. 25C] are shown in a side view, a cross-sectional view of a separate hook part, a cross-sectional view according to the arrow XXVB, and an exploded view schematically showing the basis A possible modification of the specific example of the picking hook of the modification of FIGS. 23 and 24.

Claims (15)

A method for manufacturing a tubular knitted article (10) on a circular knitting machine (200), the circular knitting machine comprising a needle cylinder (220) having a circular needle bed (210); wherein the method comprises The following steps: Knitting a tubular knitted article (10) starting from an edge and ending at an open toe; A pick-up part (300) is configured to be coaxial with the needle cylinder (220), the pick-up part is provided with a plurality of pick-up hooks (100), and the plurality of pick-up hooks surround the pick-up part (300) according to a ring (310) ) One axis (315) configuration, the ring (310) is divided into two circular half-rings (310a, 310b) of the picking hooks (100) that can be flipped to each other, wherein each picking hook (100) ) Comprises: a handle (101), which is movably constrained to the picking part (300), has a longitudinal axis (102) and terminates in a hook part (103); and a latch part (105), It has a rod (106) constrained to the handle (101) of the hook portion (103) in a sliding manner along the longitudinal axis (102), and a rod (106) configured to cooperate with the hook portion (103) A head (108); Each picking hook (100) is arranged in a first position spaced apart from the tubular knitted article (10). In the first position, the head (108) of the latch portion clamps the The hook part (103) remains open; Make each picking hook (100) and the latch part (105) move integrally from the first position toward the tubular knitted article (10) to a second position, wherein each picking hook (100) The hook part (103) engages the tubular knitted article (10); Slide the rod (106) of each latch part (105) of each pick-up hook (100) along the longitudinal axis (102) of the handle (101) until the hook part (103) is closed , Thereby preventing the tubular knitted article (10) from releasing from the picking hooks (100); Removing the tubular knitted article (10) from the needle cylinder (220) by means of the pick-up component (300) and the pick-up hooks (100) joined to the tubular knitted article (10); Turn the two circular half-rings (310a, 310b) of the picking hook (100) upside down to each other, so that the two opposite edges of the open toe of the tubular knitted article (10) are superimposed on each other; Join the two opposite edges to each other to form a closed toe; The tubular knitted article (10) with the closed toe is unloaded. The method of claim 1, wherein the step of moving each picking hook (100) toward the tubular knitted article (10) comprises inserting each picking hook (100) between two needles (210) of the needle bed The step of joining a part of the tubular knitted article (10) between successive needles (210). Such as the method of claim 1 or 2 or 3, wherein the step of moving each picking hook (100) toward the tubular knitted article (10) includes forming approximately 90 degrees around the axis (315) relative to the picking member (300) ° An angular orientation and a respective axis of rotation (302) relative to the pick-up part (300) makes each pick-up hook (100) and the latch part (105) rotate integrally so as to face the pick-up part ( The step of moving the hook part (103) of each picking hook (100) on the axis of 300). Such as the method of one or more of claims 1 to 3, wherein the step of joining the two opposite edges of the open toe portion of the tubular knitted article (10) to each other includes the step of using the picking hooks (100) A radially outward movement of the hook parts (103) and the corresponding latch parts (105) integrally pulls the yarn loop part radially outward with respect to the axis (315) of the pick-up member (300) 32) Steps. For example, the method of one or more of claims 1 to 4, wherein a picking hook (100) is provided every two needles (210) on the picking component (300), and the picking hooks (100) The hook portion (103) is tapered in a front area of the axis (315) facing the pick-up part (300) and has a maximum lateral dimension greater than the distance (226) between adjacent needles (210) (224). The picking hooks (100) are inserted between several pairs of alternating needles (210), which increases the distance between several pairs of adjacent needles (210) interspersed with the picking hooks (100) ( 226) and reduced the distance (226) between the pairs of adjacent needles (210) without interspersing the picking hooks (100), making it possible to obtain a closer pitch than the needles (201) The suture loop to perform fine connection or stitching. A picking device (318) for picking up tubular knitted objects (10) from a circular knitting machine (200), which comprises a needle cylinder (220) with a circular needle bed; the picking device comprises: A pick-up component (300), which is provided with a plurality of pick-up hooks (100), the plurality of pick-up hooks are arranged according to a ring (310) around an axis (315) of the pick-up component (300), and the ring ( 310) is divided into two circular half-rings (310a, 310) of picking hooks (100) that can be turned over to each other, wherein each picking hook includes a handle (101) with a longitudinal axis (102) ), terminating in a hook part (103), movably constrained to the picking component (300); A handling device (350) configured to move the picking part (300) between at least two operating positions; A turning device (305) for turning the circular half-rings (310a, 310b) of the picking hook (100) onto each other; A driving device (330) of the picking hooks (100), which is used to move each picking hook (100) relative to the axis of the picking component (300), The pick-up device is characterized in that: each pick-up hook (100) includes a latch part (105), which has a rod (106) that can be slidably moved along the longitudinal axis (102) and is connected to the card The hook part (103) cooperates with a head (108); and a control device is provided in which the head (108) keeps the hook part (103) open in a first position and the head (108) 108) Enclose the hook part (103) to hold the tubular knitted article (10) between a second position and slide each latch part (101) along the handle (101) of the respective picking hook (100) 105). Such as the picking device of claim 6, wherein each picking hook (100) is provided with a rotational movement relative to the picking part (300), so that the hook part (103) is radially directed toward the picking part (300) The axis moves and the hook part is moved away from the axis of the pick-up component, and the latch part (105) and the pick-up hook (100) move integrally in the rotational movement. Such as the device of claim 7, wherein the rotational movement is a rotational movement around a respective rotational axis (302) oriented at an angle of approximately 90° with respect to the axis (315) of the pickup member (300). Such as the device of claim 7 or 8, wherein the handle (101) of each picking hook (100) has a shape selected from the following: A layered shape with at least one protrusion (101b), the lever (106) of the latch portion (105) has at least one slot (106b), and the protrusion (101b) of the handle engages in a sliding manner In the at least one slot; It has a layered shape with at least one slot (106c), and the rod (106) of each latch portion (105) has at least one protrusion ( 101c); A box shape including an inner sliding seat (101a), and the rod (106) of the corresponding latch part (105) is accommodated in the inner sliding seat. For example, the device of one or more of claims 6 to 9, wherein the handle (101) of each picking hook (100) has a fixed part (104), which can move the picking hook (100) Constrained to the picked part (300). Such as the device of claim 10, wherein the fixed part (104) is formed by two opposite halves (104a, 104b), and at least one of the two opposite halves is connected to the handle (101) in a cantilever manner . A system for manufacturing tubular knitted articles (10), which comprises: A circular knitting machine (200) with a needle cylinder (220) containing a circular needle bed; Pick up devices (318) as in one or more of claims 6 to 11; A closing device (500) is provided with suture needles (505) to close the two opposite edges of a toe of the tubular knitted article (10). Such as the system of claim 12, wherein the picking hooks (100) are adapted to be inserted between two adjacent needles (210) of the circular needle bed (210). Such as the system of claim 12 or 13, wherein on the picking component (300), a picking hook (100) is provided every two needles of the circular needle bed, and wherein the picking hooks (100) have A hook portion (103), which faces the front section of the axis (315) of the picking part (300) and has a distance (226) greater than that between adjacent needles (210) of the circular needle bed (210) ) One of the largest horizontal dimensions (224). Such as the system of claim 12, 13 or 14, wherein the picking hooks (100) have a tapered shape, which is configured to intersect between pairs of adjacent needles (210).

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