JP2014051755A - Bare yarn supplying device and circular knitting machine comprising the bare yarn supplying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bare yarn supplying device installed in a circular knitting machine 2 in which a cylinder needle 10 is up-and-down movably held on an outer circumference of a cylinder 5 rotating around its longitudinal shaft, in which yarn breakage and yarn spring of the bare yarn s and failure in knitted tissue are completely overcome, a special needle is not need to be developed and operative control of the knitting machine in supplying the bare yarn s is not necessary.SOLUTION: A bare yarn supplying device comprises a bare yarn guide roller 20 rotatably supported around a horizontal rotating shaft 26 at upper circumference of a cylinder 5 such that a bare yarn s is introduced into a bare yarn supply point BP set on an up-and-down movement track of a cylinder needle 10, a roller holding mechanism 22 in which an installed position of the bare yarn guide roller 20 can be adjusted such that the bare yarn s at reaching part to the bare yarn supply point BP guided with the bare yarn guide roller 20 is positioned to be an acute angle of longitudinal directed yarn supplying angle α against a horizontal surface including the bare yarn supply point BP.

Description

  The present invention, for example, when knitting a fabric that does not fray even if it is cut (cut off) at an arbitrary location, more specifically, when trying to adopt a bear milling mesh knitting or the like during this knitting. The present invention relates to a bare yarn feeding device that can be suitably employed and a circular knitting machine including the bare yarn feeding device.

  Conventionally, the part to be finished as an opening of clothing (cuffs, collar, hem, etc.) is made into a fabric structure knitted with heat-sealed elastic yarns such as polyurethane processed yarn and other yarns, A function to prevent fraying at the opening by heating to a temperature at which self-adhesion occurs in the heat-fusion elastic yarn (referred to as “heat setting process”. In some cases, compression may be applied) A technique for generating a function that can be cut off is known (for example, see Patent Document 1).

  In the plating knitting, as shown in FIG. 9 (A), two yarns of different materials are knitted by guiding them to two yarn feeders provided at one place and feeding them to a knitting point. Is the method. In this plating, the two supplied yarns are distributed on both the front and back sides of the fabric, differences in properties such as stretchability and tightness (function sharing), or differences in texture and color (reversible), etc. There is a feature that can be clearly generated.

  Therefore, in the case where the plating knitting is adopted with the heat fusion elastic yarn and the other yarns, the heat fusion elastic yarn can be brought close to all the loops only on one side of the fabric. For this reason, if the heat-sealed elastic yarn is fed through all the necks of a circular knitting machine (either a single machine or a double machine), the stitches can be stabilized (bonded) as a whole fabric. In some cases, fraying does not occur even if cutting (cutting out) at an arbitrary position.

  The term “split yarn” is a synonym for “plating”. However, in general, in a case called “plating knitting” or “split yarn knitting”, as shown in FIG. 9 (B), a plurality of yarns are aligned and guided to one yarn feeder. It is sometimes confused or misunderstood as meaning including so-called “co-editing (sometimes called popular names such as assorted editions)”. Therefore, in the following, the term “plating” will be unified to identify the yarn feeding method in FIG.

Japanese Patent No. 3983729

In the case where plating knitting is performed using a heat fusion elastic yarn as a splicing yarn and a yarn other than the heat fusion elastic yarn as a ground yarn, for example, when trying to adopt a bear milling mesh knitting, The problem described may have occurred.
“Bare milling” is a knitting that uses a double circular knitting machine (circular knitting machine having a cylinder and a dial) to knitting rubber using bare yarn (a bare yarn that is an elastic yarn such as polyurethane and is not covered). Method or fabric knitted by this knitting method. Here, bear milling includes bear smooth and other changing structures.

The mesh knitting is a knitting method for generating a watermark in a knitted structure, and is realized by performing transfer (transfer of a loop) from a cylinder needle to a dial needle during knitting.
In plating knitting using such a mesh pattern of bear milling, when transferring (when the loop comes off from the cylinder needle), the latch of the cylinder needle (the swing claw for opening and closing the hook at the needle tip) is used. (This is also called Bella). Naturally, the cylinder needle immediately after the transfer has no loop to be held (because it is delivered to the dial needle).

Therefore, in order to supply a new yarn to the cylinder needle, the latch is forcibly opened by a latch opener, which will be described later. There was a problem that did not eat well.
In particular, when the heat-sealing elastic yarn used as a splicing yarn is a bare yarn, the bare yarn has a characteristic that it is thinner, less slipping, and easier to cut than a yarn (polyester or the like) used as a ground yarn. For this reason, mistakes in bare yarn feeding occur frequently.

In addition, even when the splicing thread is successfully fed to the hook of the cylinder needle, there is a problem that the arrangement of the ground thread and the splicing thread is switched in the hook, resulting in poor plating (attaching to one side of the fabric) There was also a problem that the thread does not concentrate.
Conventionally, in order to solve these problems, there have been attempts to variously devise the hook shape of the cylinder needle. However, changing the hook shape alone is not enough to solve the problem, and it is necessary to control the knitting speed, yarn feeding speed, etc., which leads to a decrease in operating efficiency during knitting machine operation. Not in. In addition, there is a problem that the production cost of cylinder needles is extremely high because a quantitative balance between supply and demand cannot be secured with respect to the production of cylinder needles.

  The present invention has been made in view of the above circumstances, and is capable of completely eliminating yarn breakage, sag, defective knitting structure, and the like with respect to bare yarn (bare yarn such as polyurethane). A bare yarn feeding device that can eliminate the need for the operation control of the knitting machine associated with bare yarn feeding, and a circular knitting machine including the bare yarn feeding device. The purpose is to provide.

In order to achieve the above object, the present invention has taken the following measures.
That is, the bare yarn supplying device according to the present invention is provided with a circular knitting machine in which a cylinder needle is held on the outer peripheral surface of a cylinder rotating around a vertical axis so as to be movable up and down. A bare yarn guide roller rotatably held around a horizontal rotation axis at the upper peripheral portion of the cylinder so as to guide the bare yarn toward a yarn feed point for the bare yarn set on a moving track, and for the bare yarn The position of the bare yarn guide roller is adjusted so that the portion of the bare yarn that is guided by the guide roller and reaches the yarn feeding point has an acute vertical yarn feeding angle with respect to the horizontal plane that includes the yarn feeding point. And a roller holding mechanism that makes it possible.

A portion of the bare yarn led to the bare yarn guide roller and reaching the bare yarn feeding point has an acute lateral feeding angle with respect to a cylinder tangential vertical plane including the yarn feeding point. It is preferable to have a second roller holding mechanism that can adjust the installation position of the bare yarn guide roller.
At the position upstream of the bare yarn guide roller in the bare yarn supply direction, it is rotatably held around another horizontal rotation axis set to intersect the horizontal rotation axis of the bare yarn guide roller. It is preferable that an idle roller for circumscribing and supporting the bare yarn is provided.

On the other hand, the circular knitting machine according to the present invention includes the bare yarn feeding device having the above-described configuration.
A yarn feeding point for ground yarn that feeds the yarn used as the ground yarn of the plating knitting toward the vertical movement track of the cylinder needle at a position upstream of the yarn feeding point for the bare yarn in the rotation direction of the cylinder. Is set, and the ground yarn guides the ground yarn to the yarn feeding point for the ground yarn while maintaining a positional relationship that is relatively inward in the radial direction of the cylinder with respect to the installation position of the bare yarn guide roller A yarn feeding guide may be provided.

A dial that rotates integrally concentrically with the cylinder is provided at an upper portion of the cylinder, and a dial needle is held on the upper surface of the dial so as to be movable in a radial direction. A latch opener is provided at the upstream position in the rotational direction to contact the latch of the cylinder needle that has been closed by transferring from the cylinder needle to the dial needle. The yarn feeding point may be set between the latch opener and the bare yarn feeding point in the cylinder rotation direction.

  In the bare yarn feeding device according to the present invention and the circular knitting machine including the bare yarn feeding device, the yarn breakage, the stitches, the knitting structure defect, etc. are caused with respect to the bare yarn (bare yarn such as polyurethane). It is possible to completely eliminate the problem, and it is unnecessary to develop a special needle. Further, it is possible to eliminate the operation control of the knitting machine accompanying the supply of the bare yarn.

It is the sectional side view which showed the circular knitting machine provided with the bare yarn feeding apparatus which concerns on this invention. It is the front view (AA line arrow view of FIG. 1) which showed the yarn supply condition by the bare yarn supplying apparatus which concerns on this invention. It is the top view which showed the bare yarn feeding apparatus which concerns on this invention. It is the front view which showed the bare yarn feeding apparatus which concerns on this invention. It is the plane schematic diagram explaining the position adjustment of the guide roller for bare yarns by the 2nd roller holding mechanism (2nd holding mechanism). It is the front schematic diagram explaining the position adjustment by another pattern of the guide roller for bare yarns by a roller holding mechanism (1st holding mechanism). It is the perspective view which showed the yarn supply condition of the bare yarn by the bare yarn supply apparatus which concerns on this invention in an easy-to-understand manner. It is operation | movement explanatory drawing which showed the relationship between the up-and-down movement of a cylinder needle | hook, a supplementary thread (bare thread | yarn), and the supply of a ground thread with time. (A) is a schematic diagram outlining the plating, and (B) is a schematic diagram outlining the knitting.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 8 show a bare yarn feeding device 1 according to the present invention and a circular knitting machine 2 including the bare yarn feeding device 1.
First, the circular knitting machine 2 will be described. As shown in FIG. 1, the circular knitting machine 2 includes a cylindrical cylinder 5 and a disk-shaped dial 6 provided concentrically on the cylinder 5. Organization) is possible.

  The cylinder 5 and the dial 6 can rotate integrally around the longitudinal axis P that is the center thereof, and a driving force for rotation is transmitted through the transmission means 7. The cylinder 5 holds a large number of cylinder needles 10 parallel to the longitudinal axis P so as to surround the entire outer periphery of the cylinder 5, and the dial 6 has a dial needle extending along the radial direction on the upper surface thereof. 11 are held in a radial arrangement around the vertical axis P.

  A cam holder 12 is installed and fixed on the outer peripheral portion of the cylinder 5, and a stitch cam for causing each cylinder needle 10 to move up and down (knitting operation) at a predetermined timing is provided on the inner peripheral surface of the cam holder 12. It has been. Accordingly, when the cylinder 5 is rotated, the cylinder needle 10 is caused to move up and down along the stitch cam of the cam holder 12 (see the locus L in FIG. 8).

  Further, an upper cam holder 13 is provided in a stationary state on the upper portion of the dial 6, and a dial cam for causing the dial needle 11 to move laterally (knitting operation) is provided on the lower surface of the upper cam holder 13. ing. Accordingly, the dial 6 that rotates integrally with the cylinder 5 causes the dial needle 11 to move laterally along the dial cam of the upper cam holder 13.

  In this way, there are knitting points (knitting points) by the hooks of the cylinder needle 10 and / or the dial needle 11 at a plurality of locations in the circumferential direction along the upper peripheral side of the cylinder 5 (the outer peripheral side of the dial 6). It is formed. Therefore, if yarns are fed to each knitting point, a cylindrical fabric W of milling (= double = rubber knitting) or tengu (= single = flat knitting) is knitted down toward the inside of the cylinder 5.

A winding device 14 is provided at the lower part of the cylinder 5, and the tubular fabric W knitted down through the inside of the cylinder 5 is taken up by the winding device 14.
In the present embodiment, “plating knitting” using a heat-fusing elastic yarn as a splicing yarn as a material for knitting a fabric that can be prevented from fraying even if it is cut (cut off) at an arbitrary place. It is set to perform. A bare yarn (bare yarn such as polyurethane) is used as the heat-sealing elastic yarn. The ground yarn of the plating knitting is not particularly limited, but for example polyester is used.

  Therefore, in this circular knitting machine 2, as shown in FIGS. 7 and 8, the splicing yarn (hereinafter referred to as “bearing yarn s”) is directed toward the vertical movement trajectory of the cylinder needle 10 at each knitting point. The bare yarn supplying point BP for supplying yarn and the ground yarn supplying point GP for supplying the ground yarn g toward the vertical movement track of the cylinder needle 10 are set to be adjacent to each other. These two points BP and GP are arranged so that the ground yarn feeding point GP is upstream in the rotational direction of the cylinder 5 and the bare yarn feeding point BP is downstream. Is fed first, and then the bare yarn s is fed.

  Note that “yarn feeding points” such as the bare yarn feeding point BP and the ground yarn feeding point GP are often the same positions as the knitting points generated in the trajectory in which the cylinder needle 10 moves up and down. However, it is not necessarily limited to knitting points. For example, the yarn feeding point can be set while the cylinder needle 10 moves up and down toward the knitting point (non-knitting point). In short, the position where the yarn should be fed at a suitable timing with respect to the hook of the cylinder needle 10 moving up and down toward the knitting at the knitting point is the yarn feeding point for that yarn.

In the vicinity of the upper peripheral portion of the cylinder 5, a bare yarn feeding device 1 for guiding the bare yarn s to the bare yarn feeding point BP and a ground for guiding the ground yarn g to the ground yarn feeding point GP. The yarn supply guide 15 for yarn is provided so as to make a pair with each other.
In the present embodiment, “mesh knitting” is set. Therefore, the cylinder needle 10 used in the circular knitting machine 2 has a dedicated transfer needle that enables transfer to the dial needle 11 (a structure that guides the entry of the dial needle 11 into the loop held by the cylinder needle 10). Selected needle). In such a cylinder needle 10 (dedicated transfer needle), when the cylinder needle 10 descends, transfer to the dial needle 11 (loop feed) is performed while taking off the loop, so that it is latched in the loop to be removed. 17 is caught, and after the transfer, the latch 17 is closed (see the cylinder needle 10 at the left end of FIG. 2).

Therefore, in this circular knitting machine 2, as shown in FIG. 2, in the upper peripheral portion of the cylinder 5, the transfer position (the rotation of the cylinder 5 is more than the bare yarn feeding point BP and the ground yarn feeding point GP). A latch opener 18 is provided at a position immediately downstream of the upstream side in the direction).
The latch opener 18 is configured such that a cam rail 18 a formed of a wire rod is attached to a row of cylinder needles 10 that travels as the cylinder 5 rotates, and the tip of the cam rail 18 a is opposite to the rotation direction of the cylinder 5. The direction is (upstream). For this reason, the cam rail 18a is inserted into the hook of the cylinder needle 10 and forcibly swings (opens) the latch 17 while contacting the latch 17 in the closed state. Enables the ground yarn g and the bare yarn s to be fed.

Next, the bare yarn supplying device 1 will be described. As shown in FIG. 1, a plurality of bare yarn feeders 1 are provided in the circumferential direction of the cylinder 5 so as to individually correspond to each knitting point in the circular knitting machine 2.
The bare yarn feeding device 1 includes a bare yarn guide roller 20 provided so as to be close to an upper peripheral portion of a cylinder 5 and an idle roller provided so as to guide the bare yarn s to the bare yarn guide roller 20. 3, and as shown in FIGS. 3 and 4, the roller holding mechanism 22 and the second roller holding mechanism 23 provided at the installation portion of the bare yarn guide roller 20 are provided.

In order to clarify the roller holding mechanism 22 and the second roller holding mechanism 23, the roller holding mechanism 22 is hereinafter referred to as “first holding mechanism 22” and the second roller holding mechanism 23 is referred to as “second holding mechanism”. 23 ”in other words.
The bare yarn guide roller 20 is formed with a V-shaped groove, a U-shaped groove, a square groove (a U-shaped groove), or the like that guides the bare yarn s on the outer peripheral surface of the roller. It is rotatably held by a horizontal rotation shaft 26 provided (including the case where it is above or radially outward). The groove provided on the outer peripheral surface of the roller is preferably a V-shaped groove in order to prevent the running yarn from fluctuating (meandering) and coming off.

This bare yarn guide roller 20 receives a rotational force due to contact resistance with the bare yarn s as the bare yarn s is fed, and lightly rotates (driven rotation).
As described above, it is important that the bare yarn guide roller 20 has a freely rotating structure, and the rotational speed difference between the bare yarn guide roller 20 and the bare yarn s is zero, and the bare yarn s is not scratched. Can be maintained. The bare yarn guide roller 20 is preferably formed of a resin material such as POM or nylon.

  The first holding mechanism 22 can adjust the installation height of the bare yarn guide roller 20, the separation distance from the bare yarn supply point BP, or both the installation height and the separation distance. By performing these adjustments, the vertical direction generated between the bare yarn s that is guided to the bare yarn guide roller 20 and reaches the bare yarn supply point BP and the horizontal plane that includes the bare yarn supply point BP. The direction yarn feeding angle α (FIG. 2) is set to an acute angle.

  Here, the acute angle of the longitudinal yarn feeding angle α is set to 0 ° or more and less than 90 °. However, with respect to a horizontal plane including the bare yarn supply point BP, a vertical yarn supply angle α is generated on the lower side (in the case of FIG. 2) and a vertical yarn supply angle on the upper side of the horizontal plane. It is assumed that both cases where α is generated (in the case of FIG. 6) are included. That is, it is within a range of −90 ° to + 90 ° with respect to the horizontal plane. Specifically, the range of −60 ° to + 60 ° was suitable.

  On the other hand, the second holding mechanism 23 can adjust the direction of the bare yarn guide roller 20 (the angle in the horizontal plane for sending the bare yarn s). By performing this adjustment, a portion of the bare yarn s which is guided to the bare yarn guide roller 20 and reaches the bare yarn supply point BP, and a vertical surface in the cylinder tangential direction including the bare yarn supply point BP. The transverse yarn feeding angle β (FIG. 5) generated therebetween is set to an acute angle.

  Here, the acute angle of the transverse yarn feeding angle β is set to 0 ° or more and less than 90 °. However, with reference to the vertical surface in the cylinder tangential direction including the yarn supply point BP for bare yarn, the lateral yarn feeding angle β is generated on the outer side in the radial direction (in the case of FIG. 5), and the diameter of the vertical surface It includes both cases where the lateral yarn feeding angle β is generated on the inner side in the direction (not shown). In order to generate the transverse yarn feeding angle β on the radially inner side of the vertical surface, the bare yarn guide roller 20 may be disposed above the outer peripheral portion of the cylinder 5. That is, it is within a range of −90 ° to + 90 ° with respect to the vertical plane. Specifically, the range of −60 ° to + 60 ° was suitable.

  Specifically, the first holding mechanism 22 and the second holding mechanism 23 for enabling the position adjustment of the bare yarn guide roller 20 adopt a structure as shown in FIGS. 3 and 4. Can be realized. That is, the horizontal rotation shaft 26 of the bare yarn guide roller 20 is formed by an L-shaped roller support shaft 28 having a suspension shaft 27 connected in a bent shape at one end thereof, and the suspension shaft 27 of the roller support shaft 28. Is held by the horizontal arm 30 so as to be movable up and down.

The horizontal arm 30 is provided with a vertical straight hole for allowing the drooping shaft 27 of the roller support shaft 28 to pass therethrough, and a hexagon socket head screw (Imo screw) is formed in the middle of the straight hole so as to be orthogonal to the hole direction. Or a screw (also called a hollow set or the like) 31 is screwed in.
Further, the horizontal arm 30 is structured to be cantilevered by the horizontal overhanging piece 33 by an L-shaped bracket 34 having a vertical mounting piece 32 and a horizontal overhanging piece 33. In the horizontal arm 30, a long long hole 36 is formed in a portion supported by the horizontal overhanging piece 33 along the longitudinal direction of the horizontal arm 30, and a mounting bolt 37 inserted into the long hole 36 is attached. It is assumed that the L-shaped bracket 34 is screwed into the horizontal projecting piece 33.

The L-shaped bracket 34 fixes the vertical mounting piece 32 to the device frame of the circular knitting machine 2 (the fixed side that supports the rotation of the cylinder 5 and the dial 6) or the upper cam holder 13 and the like. 33 is set to project outward in the radial direction of the cylinder 5.
By adopting such a structure, the roller support shaft 28 can be moved up and down by slightly loosening the hexagon socket head screw 31 of the horizontal arm 30 (see Z in FIG. 4). Accordingly, the height of the bare yarn guide roller 20 can be adjusted. In addition, the horizontal arm 30 can be slid along the long hole 36 by slightly loosening the mounting bolts 37 of the L-shaped bracket 34 (see X in FIGS. 3 and 4). Thus, the distance for separating the bare yarn guide roller 20 from the bare yarn supply point BP can be adjusted.

Therefore, the structure that enables the height adjustment and the separation distance adjustment constitutes the first holding mechanism 22 for the longitudinal yarn feeding angle α.
Further, when the mounting bolt 37 of the L-shaped bracket 34 is slightly loosened, the horizontal arm 30 can be swung horizontally around the mounting bolt 37 (see R in FIGS. 3 and 4). Accordingly, the orientation of the bare yarn guide roller 20 can be adjusted. In the state where the hexagon socket head screw 31 of the horizontal arm 30 is slightly loosened, the roller support shaft 28 can be rotated around the hanging shaft 27 (see Q in FIGS. 3 and 4). Also, the orientation of the bare yarn guide roller 20 can be adjusted.

Therefore, the structure that enables these orientation adjustments constitutes the second holding mechanism 23 for the lateral yarn feeding angle β.
In the ground yarn feeding guide 15, the ground yarn g fed to the ground yarn feeding point GP intersects with the bare yarn s fed from the bare yarn guide roller 20 to the bare yarn feeding point BP. In order to prevent this, in the radial direction of the cylinder 5, it is arranged so as to maintain a positional relationship that is inward relative to the installation position of the bare yarn guide roller 20.

  The idle roller 21 is set in another horizontal position that intersects with the horizontal rotation shaft 26 of the bare yarn guide roller 20 at a position upstream of the bare yarn guide roller 20 in the yarn feeding direction of the bare yarn s. The bear yarn s is circumscribedly supported by being rotatably held around the rotation shaft 40. The idle roller 21 also has a V-shaped groove, a U-shaped groove, a square groove (a U-shaped groove) or the like formed on the outer peripheral surface of the roller. For the same reason as in the case of the bare yarn guide roller 20, the groove on the outer peripheral surface of the roller is preferably a V-shaped groove.

  The horizontal rotation shaft 40 of the idle roller 21 may be provided so as to intersect with the horizontal rotation shaft 26 of the bare yarn guide roller 20 at an intersection angle of 60 ° to 90 °. In other words, when both of the grooves provided on the roller outer peripheral surfaces of the bare yarn guide roller 20 and the idle roller 21 are V-shaped grooves, the bare yarn s is guided on the roller outer peripheral surface of the bare yarn guide roller 20. The rotation surface and the rotation surface which guides the bare yarn s among the roller outer peripheral surfaces of the idle roller 21 are in a state where they intersect at an intersection angle of 60 ° to 90 °.

In this case, since the bare yarn s is subjected to unambiguous position restraint from both directions by the two rollers 20 and 21, there is an advantage that fluctuation (meandering) can be suppressed as much as possible. That is, since no vibration is generated in the bare yarn s fed from the bare yarn guide roller 20 to the bare yarn feeding point BP, there is an advantage that a mistake in feeding or a knitting error is prevented.
The crossing angle of the horizontal rotation shafts 26 and 40 is not particularly limited as long as it is within 60 ° to 90 °, but the orthogonal relationship (90 °) prevents contact interference with peripheral equipment. It is suitable in the above.

By providing such an idle roller 21, it is possible to expect an action to cancel the twist when a twisting action occurs in the bare yarn s, and the bare yarn s fed through the bare yarn guide roller 20 can be expected. Straightness can be imparted.
As described above in detail, in the bare yarn feeding device 1 according to the present invention and the circular knitting machine 2 including the bare yarn feeding device 1, the bare yarn by the first holding mechanism 22 and the second holding mechanism 23 is used. By adjusting the position of the yarn guide roller 20, the longitudinal yarn feeding angle α and the lateral yarn feeding angle β of the portion of the bare yarn s that is guided to the bare yarn guide roller 20 and reaches the bare yarn feeding point BP. Can be set to have an acute angle.

Therefore, with respect to the supply of the bare yarn s, it is possible to obtain an optimum yarn supply state that can completely eliminate yarn breakage, looseness, knitting structure failure, and the like. Naturally, this makes it unnecessary to develop special needles having variously changed hook shapes, and also eliminates the need for operation control of the circular knitting machine 2 accompanying the supply of the bare yarn s.
Therefore, a fabric that does not fray can be knitted with a high yield even if it is cut (cut off) at an arbitrary location, and it is also possible to employ a bare milling mesh knitting.

The present invention is not limited to the embodiment described above, and can be changed as appropriate according to the embodiment.
For example, the circular knitting machine 2 is not limited to a double machine (for double knitting), and may be a single machine (for single knitting), a sock knitting machine, or the like. In short, any knitting machine (including a double cylinder or the like) having a cylindrical cylinder 5 rotating around the vertical axis P and having a cylinder needle 10 held on the outer peripheral surface thereof may be used.

Even in the case where the circular knitting machine 2 is a double machine, it is possible to employ a usage method in which a cylinder 5 or a dial 6 is used to knit a sheet.
The transfer is not limited to the transfer from the cylinder needle 10 to the dial needle 11, but as the transfer from the dial needle 11 to the cylinder needle 10, or the transfer performed between the cylinder needles 10 or between the dial needles 11. Also good.

The bare yarn supplying apparatus 1 according to the present invention is not limited to be provided corresponding to all the knitting points, and in short, it may be provided at a position where the bare yarn is desired to be supplied. Also, the provision of the bare yarn feeding device 1 and the ground yarn feeding guide 15 as a pair is not limited, and the bare yarn feeding device 1 may be provided alone.
Therefore, the bare yarn feeding device 1 according to the present invention can be used for ground yarn feeding when performing the plating knitting, and yarn feeding when performing other than the plating knitting. In this case, the “bear yarn” in the claims and the name of the invention may be replaced with the name of the yarn to be supplied.

The bare yarn feeding device 1 according to the present invention is not limited to the case where transfer is performed, and can be beneficially used for bare yarn feeding when tack knitting or the like is performed.
The first holding mechanism 22 and the second holding mechanism 23 provided for the bare yarn guide roller 20 are not limited to those exemplified in the above embodiment, and various conventionally known structures can be employed. In short, the first holding mechanism 22 can adjust the installation height of the bare yarn guide roller 20, the separation distance from the bare yarn supply point BP, or both the installation height and the separation distance. The second holding mechanism 23 only needs to be capable of adjusting the orientation of the bare yarn guide roller 20.

Two or more idle rollers 21 may be provided along the yarn feeding direction of the bare yarn s. In this case, the horizontal rotation shafts 40 may be arranged to cross each other between the idle rollers 21.
In the case where the groove provided on the outer peripheral surface of the bare yarn guide roller 20 or idle roller 21 is a V-shaped groove, FIG. 3 shows an example in which a V-shaped pointed end is provided with a concave round groove bottom shape. did. However, the V-shaped pointed portion may have a groove bottom shape with an internal folding angle.

DESCRIPTION OF SYMBOLS 1 Bare yarn feeder 2 Circular knitting machine 5 Cylinder 6 Dial 7 Transmission means 10 Cylinder needle 11 Dial needle 12 Cam holder 13 Upper cam holder 14 Winding device 15 Ground yarn feeding guide 17 Latch 18 Latch opener 18a Cam rail 20 Bear Guide roller for yarn 21 Idle roller 22 Roller holding mechanism (first holding mechanism)
23 Second roller holding mechanism (second holding mechanism)
26 Horizontal rotary shaft 27 Drooping shaft 28 Roller support shaft 30 Horizontal arm 31 Hexagon socket head screw 32 Vertical mounting piece 33 Horizontal overhanging piece 34 L-shaped bracket 36 Long hole 37 Mounting bolt 40 Horizontal rotational shaft α Longitudinal feeding angle β Horizontal Direction yarn feed angle BP Bare yarn feed point GP Ground yarn feed point L Trajectory P Vertical axis W Cylindrical fabric g Ground yarn s Bear yarn

Claims (6)

A bare yarn supplying device provided in a circular knitting machine in which a cylinder needle is held on an outer peripheral surface of a cylinder rotating around a vertical axis so as to be movable up and down,
A bare yarn guide roller rotatably held around a horizontal rotation axis at an upper peripheral portion of the cylinder so as to guide the bare yarn toward a yarn feeding point for the bare yarn set on a vertical movement track of the cylinder needle. ,
The bare yarn guide roller is guided so that a portion of the bare yarn that is guided to the bare yarn guide roller and reaches the yarn feeding point has an acute vertical yarn feeding angle with respect to a horizontal plane including the yarn feeding point. A roller holding mechanism that makes the installation position adjustable;
A bare yarn supplying device.   A portion of the bare yarn led to the bare yarn guide roller and reaching the bare yarn feeding point has an acute lateral feeding angle with respect to a cylinder tangential vertical plane including the yarn feeding point. 2. The bare yarn feeding device according to claim 1, further comprising a second roller holding mechanism that enables adjustment of an installation position of the bare yarn guide roller.   At the position upstream of the bare yarn guide roller in the bare yarn supply direction, it is rotatably held around another horizontal rotation axis set to intersect the horizontal rotation axis of the bare yarn guide roller. The bare yarn supplying device according to claim 1, further comprising an idle roller that circumscribes and supports the bare yarn.   A circular knitting machine comprising the bare yarn feeding device according to any one of claims 1 to 3. A yarn feeding point for ground yarn that feeds the yarn used as the ground yarn of the plating knitting toward the vertical movement track of the cylinder needle at a position upstream of the yarn feeding point for the bare yarn in the rotation direction of the cylinder. Is set,
A ground yarn feeding guide is provided that guides the ground yarn to the yarn feeding point while maintaining a positional relationship that is relatively inward in the radial direction of the cylinder with respect to the installation position of the bare yarn guide roller. The circular knitting machine according to claim 4, wherein the circular knitting machine is provided. A dial that rotates concentrically with the cylinder is provided at the upper part of the cylinder, and a dial needle is held on the upper surface of the dial so as to be movable in the radial direction.
At the position upstream of the yarn feed point for the bare yarn in the rotation direction of the cylinder, the latch is opened by contact with the latch of the cylinder needle that is in the latch closed state by transferring from the cylinder needle to the dial needle. A latch opener is provided,
The circular knitting machine according to claim 5, wherein the ground yarn feeding point is set between the latch opener and the bare yarn feeding point in the cylinder rotation direction.