JP2022104202A - Device for supplying yarns to knitting machine - Google Patents

Abstract

To provide a device for supplying yarns to a knitting machine, which can supply yarns of required lengths from a yarn source even when consumption of a plurality of yarns is different.SOLUTION: A roller 21 can feed warp 9 to a flat-knitting machine 2 or the like from a creel 10 or the like to be a yarn source by rotation of the roller 21 in a closed state through a downstream section 26 from an upstream section 25 to be a route of the warp 9. The roller 21 is provided with a roller position detection section 21b so as to stop in an open state. The warp 9 excessively fed to the downstream section 26 on an upper side from the roller 21 returns to the upstream side 25 on a lower side in the open state. The warp 9 retuned to the upstream side 25 is stored in a storage section 27 and is loosened by gravity. The stored warp 9 can be supplied to a warp pipe 8 of the flat-knitting machine 2 through the roller 21 in the open state. The warp 9 which is insufficient in the storage section 27 is fed from the creel 10 by rotation of the roller 21 in the closed state.SELECTED DRAWING: Figure 1

Description

The present invention relates to a yarn supply device for a knitting machine that simultaneously supplies a plurality of yarns to a knitting machine for knitting a knitted fabric.

The knitting machine is roughly classified into a weft knitting machine for knitting a weft knitting structure and a warp knitting machine for knitting a warp knitting structure. Of the weft knitting machines, the weft knitting machine basically supplies one knitting yarn as a weft from above the tooth opening facing the tip side of the needle bed, and the knitting needles lined up laterally along the tooth opening act in sequence. Then, a course in which the stitches are lined up is formed, and the knitted fabric is knitted while connecting the stitches of the sequentially formed courses to the vertical wale. By knitting while guiding a plurality of warps from above the tooth openings of the flat knitting machine, it is possible to obtain a structure in which a plurality of warps are inserted in the knitted fabric (for example, FIGS. 3, 4, 5 of Patent Document 1). reference). Patent Document 1 discloses a configuration in which a jig in which a large number of holes are lined up is fixed above the tooth opening as a mechanism for guiding a plurality of warps to the tooth opening. The mechanism for guiding a plurality of warps to the tooth opening may be provided with a plurality of warp pipes for supplying the warp threads from above the tooth opening to the tooth opening (see, for example, Patent Document 2). Patent Document 2 discloses a drive roller for arranging and feeding warps from a plurality of yarn sources up to a warp pipe, an air injection mechanism for blowing an air flow into each warp pipe, and an active warp feeding device including the warp pipe.

Conventionally, a warp knitting machine knits a knitted fabric while supplying a plurality of warp yarns as knitting yarns. A yarn feeder capable of simultaneously supplying a plurality of warp yarns to a warp knitting machine is also known (see, for example, Patent Document 3). The yarn feeder disclosed in Patent Document 3 can simultaneously supply a plurality of warp yarns as a yarn group from a yarn source in a state where they are wound side by side as a warp beam, and a movable yarn tension rod is crimped to the yarn group. , A portion to be a storage loop is formed in the path of the warp to be deflected by the thread guide rod provided on the thread source side. When the tension of the warp increases due to sudden consumption, the thread tension rod moves in the direction of relaxing the tension by reducing the storage loop by the tension of the warp.

Japanese Unexamined Patent Publication No. 2013-040411 JP-A-2015-048536 Japanese Unexamined Patent Publication No. 47-012023

When multiple warp threads are inserted into the flat knitting machine, the inserted warp threads are lined up in the knitting width direction of the knitted fabric. The inserted warp is pulled down to the lower part of the tooth opening and consumed together with the knitted fabric in which the knitting progresses. If the number of courses is increased at a specific point of the knitting width by flechage knitting instead of uniformly knitting the knitting width with the weft, the number of warps to be inserted may increase at a specific point, resulting in a difference in consumption. There is. In the positive feed device as in Patent Document 2, when the consumption of the warp is different, there is a possibility that the supply of the warp may be excessive or insufficient.

Since the yarn feeder of Patent Document 3 feeds the yarn from the warp beam only by the tension of the warp itself consumed as the knitting machine of the warp knitting machine, if the speed of the yarn feeding is increased, an excessive load may be applied to the yarn. There is.

An object of the present invention is to provide a yarn supply device to a knitting machine capable of supplying yarn of a required length from a yarn source even when the consumption of a plurality of yarns is different.

The present invention relates to a knitting machine provided with a guide mechanism capable of simultaneously supplying a plurality of yarns when knitting a knitted fabric, in a yarn supply device to the knitting machine that simultaneously supplies the plurality of yarns to the guide mechanism. ,
A yarn source that holds the plurality of yarns so that they can be fed out, and
An upstream portion that serves as a path for the plurality of yarns drawn from the yarn source, and
A downstream portion that serves as a path for sending the plurality of yarns to the knitting machine,
Including a feed member provided between the upstream portion and the downstream portion.
The feed member is
It is possible to switch between a closed state in which the plurality of threads are sandwiched and restrained at the same time and an open state in which the plurality of threads are released.
In the closed state, the plurality of threads are fed from the upstream portion and supplied to the downstream portion.
In the open state, the plurality of threads are allowed to return from the downstream part to the upstream part by gravity.
A storage unit provided in the upstream portion or the downstream portion, which stores the plurality of yarns as an increase in slackening due to gravity and can supply the plurality of yarns to be stored to the guide mechanism.
A yarn supply device for a knitting machine, further comprising a driving means for driving a feed member so that an open state and a closed state can be switched.

Further, in the present invention, the feed member is arranged so that the direction of feeding the plurality of threads from the upstream portion to the downstream portion is from the lower side to the upper side.
The driving means drives the feed member so as to supply the plurality of threads from the lower side to the upper side in the closed state and then return the plurality of threads from the upper side to the lower side in the open state.
The storage section is provided in the upstream section and is provided.
The plurality of threads supplied to the guide mechanism are characterized in that they pass through the feed member in an open state from the storage portion.

Further, in the present invention, the feed member is arranged so that the direction of supplying the plurality of threads from the upstream portion to the downstream portion is the lateral direction, and the gravity applied to the plurality of threads is larger in the upstream portion than in the downstream portion. Being done
The storage section is provided in the upstream section and is provided.
The driving means is
After driving the feed member in the closed state and supplying multiple threads from the upstream part to the downstream part,
By opening and stopping the feed member, it is possible for multiple yarns to return from the downstream portion to the upstream portion of the reservoir.
The plurality of threads supplied to the guide mechanism are characterized in that they pass through the feed member in an open state from the storage portion.

Further, in the present invention, the feed member is
Includes at least one roller with a notch in at least a portion of the outer circumference, including
It is characterized in that the closed state and the open state are switched by the angular displacement of the roller.

Further, in the present invention, the driving means is
In the storage unit, the slack of the plurality of threads is detected, and the slack is detected.
It is characterized in that the feed member is driven in the closed state when the slack of at least one thread becomes smaller than a preset reference.

According to the present invention, a feed member capable of switching between a closed state and an open state by being driven by a driving means is provided between an upstream portion and a downstream portion of a path for supplying a plurality of yarns from a yarn source to a knitting machine. Be done. The feed member in the closed state sandwiches a plurality of threads and supplies the feed member from the upstream portion to the downstream portion. A storage section is provided in the upstream portion or the downstream portion in which a plurality of threads are stored as an increase due to gravity and the stored threads can be supplied to the guide mechanism. Since the feed member allows a plurality of threads to return from the downstream portion to the upstream portion by gravity in the open state, the length of the yarn stored in the reservoir is adjusted. A plurality of yarns are unwound from the yarn source according to the consumption of each yarn, stored in the storage unit, and supplied from the storage unit to the knitting machine, so that the required length can be obtained even if the consumption is different. Thread can be supplied.

Further, according to the present invention, the direction of the yarn supplied from the upstream portion to the downstream side in the closed state of the feed member is from the lower side to the upper side. Therefore, if the feed member is opened, gravity is used to utilize the feed member. Can be returned to the reservoir by passing it from above to below. Since a plurality of threads are supplied from the storage portion to the guide mechanism of the knitting machine via the downstream portion through the feed member in the open state, the yarn can be smoothly supplied even from the storage portion provided in the upstream portion.

Further, according to the present invention, in the plurality of yarns laterally supplied from the upstream portion to the downstream portion in the closed state of the feed member, the gravity becomes larger in the upstream portion than in the downstream portion, so that the feed member is in the open state. It is pulled to the upstream part and returns from the downstream part to the storage part in the upstream part. When the feed member is opened, the yarn can be supplied from the storage unit to the guide mechanism of the knitting machine.

Further, according to the present invention, the driving means can switch the feeding member between the open state and the closed state only by driving the roller as the feeding member so as to be angularly displaced.

Further, according to the present invention, among a plurality of yarns, the yarn that consumes a lot is detected and the yarn is fed out from the yarn source, so that the yarn that consumes a lot can be reliably supplied. The yarn that consumes less is not unwound from the yarn source, or is not excessively unwound even if it is unwound, and the unwinding of the yarn from the yarn source is appropriately adjusted according to the consumption.

FIG. 1 is a simplified right side view showing the overall configuration of the yarn supply device 1 to the knitting machine according to the first embodiment of the present invention. FIG. 2 is a schematic right side view showing the configuration of the main part of the thread supply device 1 to the knitting machine of FIG. 1 as an open state of the feed mechanism 20. FIG. 3 is a schematic right side view showing a closed state of the feed mechanism 20 of FIG. FIG. 4 is a schematic right side view showing the configuration of the feed mechanism 30 of the yarn supply device 29 to the knitting machine according to the second embodiment of the present invention. FIG. 5 is a schematic right side view showing an open state of the feed mechanism 30 of FIG. FIG. 6 is a schematic right side view showing the configuration of the feed mechanism 40 which is an application form of the second embodiment. FIG. 7 is a schematic right side view showing the configuration of the feed mechanism 50 of the yarn supply device 49 to the knitting machine according to the third embodiment of the present invention.

Hereinafter, FIGS. 1 and 2 relate to the configuration and operation of the yarn supply device 1 to the knitting machine according to the first embodiment of the present invention. 3 and 4 relate to the configuration and operation of the second embodiment of the present invention. FIG. 5 relates to the configuration and operation of the third embodiment of the present invention. Corresponding parts in each figure are indicated with the same reference numerals, and duplicate explanations may be omitted. Further, for convenience of explanation, parts not described in the figure to be explained may be referred to with reference numerals described in other figures.

FIG. 1 shows a schematic configuration of a yarn supply device 1 for a knitting machine according to a first embodiment of the present invention. For the sake of simplification of the illustration, some configurations that support each component are omitted from the illustration. The flat knitting machine 2 to be supplied with the yarn is provided with the front needle bed 3 and the rear needle bed 4 in a state of facing each other in the front-rear direction with the tooth opening 5 interposed therebetween. The hook of the knitting needle (not shown) moves back and forth to the tooth opening 5 from the tip end side of the front needle bed 3 or the rear needle bed 4 facing the tooth opening 5. Knitting yarn can be supplied from above the tooth opening 5 to the tooth opening 5 from a plurality of yarn feeders 6 and 7. In such a flat knitting machine 2, basically one knitting yarn is supplied as a weft while one of the yarn feeders 6 and 7 moves. The knitting yarns supplied from the moving yarn feeders 6 and 7 form a course in which the knitting needles lined up in the depth direction of the figure act sequentially along the tooth opening 5 to form a course in which the stitches are lined up, and the stitches of the sequentially formed course are vertically formed. It is knitted as a knitted fabric while being connected to the wales of the direction.

The weft knitting machine 2 of the first embodiment includes a guide mechanism capable of simultaneously supplying a plurality of yarns that can be inserted as warp yarns when knitting a knitted fabric with a knitting yarn serving as a warp and weft. The guide mechanism includes a plurality of warp pipes 8 arranged in the depth direction in the figure. Each warp pipe 8 is arranged at a position that does not interfere with the yarn feeders 6 and 7 that move in the depth direction, and supplies each warp 9 to the tooth opening 5 from above. The plurality of warp threads 9 are fed from the thread source reels 11, 12, 13, 14 stored in the creel 10 in a state of being aligned in the depth direction. The creel 10 is a thread source that holds a plurality of warp threads 9 so that they can be fed out. The yarn supply device 1 to the knitting machine can simultaneously supply a plurality of warp yarns 9 from a yarn source such as a creel 10 via a warp yarn pipe 8 when knitting a knitted fabric with a flat knitting machine 2. .. When the warp 9 supplied through the warp pipe 8 is inserted into the knitted fabric knitted by the knitting needle of the front needle bed 3, the knitting yarn supplied from the yarn feeder 7 on the rear needle bed 4 side of the warp pipe 8 is knitted. Organize the ground.

The yarn supply device 1 to the knitting machine of the first embodiment includes a feed mechanism 20. The feed mechanism 20 includes a roller 21, a direction changing member 22, a consumption detection mechanism 23, and a thread guide plate 24. Two rollers 21 arranged side by side are arranged as feed members, and each of the rollers 21 can be sandwiched from the left and right sides of the figure so as to contact all of the plurality of warps 9, and is in a closed state in which the rollers 21 are in contact with the plurality of warps 9 at the same time. It is possible to switch between the open state and the separated state. The two rollers 21 rotate so as to feed the warp 9 from the bottom to the top in the closed state. The direction changing member 22 arranged below the roller 21 converts the direction of the warp 9 supplied between the rollers 21 from the horizontal direction from right to left in the figure to the vertical direction from bottom to top. The consumption detection mechanism 23 and the thread guide plate 24 are arranged between the direction changing member 22 and the creel 10. The consumption detection mechanism 23 comes into contact with the plurality of warp threads 9 from above. The thread guide plate 24 has a large number of through holes 24a, and a plurality of through holes 24a are lined up in the depth direction and the vertical direction in the figure, and each warp 9 passes through each of the through holes 24a separately. Between the lower part of the roller 21 and the thread guide plate 24, there is an upstream portion 25 of the path of the warp 9, and it becomes a path of a plurality of warps 9 unwound from the thread source. The upper part of the roller 21 is a downstream portion 26 of the path of the warp 9, and is a path for sending a plurality of warp 9 to the weft knitting machine 2. In the upstream portion 25 of the first embodiment, the space between the direction changing member 22 and the thread guide plate 24 also functions as a storage portion 27, as will be described later.

FIG. 2 shows the configuration of a main part of the yarn supply device 1 for the knitting machine of FIG. The roller 21 has a notch portion 21a whose outer periphery is partially notched. When the notches 21a of the two rollers 21 face each other, a gap is formed between the surfaces of the notched outer periphery, and the two rollers 21 are in an open state. The plurality of warp threads 9 can pass in the vertical direction through the gap in the open state. The outer periphery of the roller 21 excluding the notch portion 21a is closed when the facing portions come into contact with each other, and a plurality of warp threads 9 can be fed at the same time by rotating. The rotation of the roller 21 is driven by a motor (not shown).

The roller 21 is arranged so that the direction in which the plurality of warp threads 9 are sent from the upstream portion 25 to the downstream portion 26 is from the lower side to the upper side. With the rotation of the roller 21 in the closed state, the warp 9 is fed from the lower side to the upper side by the route shown by the alternate long and short dash line. The roller 21 is provided with, for example, a roller position detection unit 21b using a proximity sensor so that the roller 21 stops when it is in the open state. The warp 9 extraly sent from the roller 21 is once received by the holder 28, and returns to the lower upstream side in the open state of the roller 21. In the upstream portion 25, the path between the direction changing member 22 and the thread guide plate 24 functions as a storage portion 27 for storing the excess warp 9 as an increase portion 9a slackened by gravity as shown by a broken line. The warp 9 including the increased portion 9a stored in the storage unit 27 can be supplied to the warp pipe 8 through the roller 21 in the open state. Since the yarn is supplied from the storage unit 27 through the roller 21 in the open state, it can be smoothly performed even if the storage unit 27 is provided in the upstream portion 25.

The consumption detection mechanism 23 includes a lever 23a, a support shaft 23b, and a wire 23c. The levers 23a are arranged on both sides of the knitting width in the depth direction in the drawing, are connected in the knitting width direction by the support shaft 23b, and can swing around the support shaft 23b. A wire 23c is linearly stretched on the upstream side of the lever 23a. The wire 23c is in contact with the width of the entire warp 9 from above. When the warp 9 is continuously supplied to the weft knitting machine 2 with the roller 21 open, the slack of the consumed warp 9 among the plurality of warp 9 is reduced. The warp 9 that is stretched with reduced slack pushes the wire 23c upward, and the lever 23a swings in the counterclockwise direction in the figure from the state shown by the broken line when the entire warp 9 has slack. It is detected by a sensor 23d such as a micro switch that the consumption of the warp 9 may be higher than the preset reference by, for example, swinging the lever 23a to the position shown by the solid line. As the sensor, an optical sensor or the like that can be detected in a non-contact manner can also be used. The optical sensor can also directly detect the slack of the warp 9 without using the consumption detection mechanism 23. As a driving means, the micro switch as the sensor 23d functions to directly control the energization of the motor, or inputs a signal to the controller that drives the motor to rotate the roller 21. The driving means drives the roller 21, which is a feed member, so that the open state and the closed state can be switched, detects the yarn that consumes a large amount of the plurality of yarns, and feeds the yarn from the yarn source, so that the yarn is consumed. It is possible to reliably supply a large amount of yarn. The yarn that consumes less is not unwound from the yarn source, or is not excessively unwound even if it is unwound, and the unwinding of the yarn from the yarn source is appropriately adjusted according to the consumption.

When the roller 21 rotates, the notch portions 21a do not face each other, the open state is switched to the closed state, and the missing warp thread 9 is unwound from the thread source reels 11, 12, 13, 14 to the upstream portion. It is supplied from 25 to the downstream portion 26. The warp 9 that is not deficient is supplied to the downstream portion 26 from the increased portion 9a remaining in the storage portion 27. When the roller 21 is in the open state, it is detected by the roller position detection unit 21b and the rotation is stopped. With the roller 21 open, the warp 9 once supplied to the downstream portion 26 returns to the storage portion 27 of the upstream portion 25, and the warp 9 is supplied to the flat knitting machine 2 from the storage portion 27. In this way, the driving means drives the roller 21 so as to supply the warp 9 from the lower side to the upper side in the closed state and then return the warp 9 from the upper side to the lower side in the open state. Even if the length of the warp 9 stored in the storage portion 27 changes according to the consumption of the warp 9, when the warp 9 is sent to the downstream portion 26 in the closed state of the roller 21, if the stored warp 9 is long, it is short. The length of the warp 9 unwound from the creel 10 is adjusted so that the shorter the length, the longer the length.

FIG. 3 shows an operation example in which the roller 21 of FIG. 2 is closed and the storage portion 27 is provided in a part of the downstream portion 26. When the roller 21 in the closed state is rotated, the warp 9 is supplied from the lower side to the upper side, and the warp 9 before being used for knitting in the flat knitting machine 2 is temporarily stored in the holder 28 or the like. Since the warp 9 in the holder 28 remains in the holder 28 if the rotation of the roller 21 in the closed state is stopped, the inside of the holder 28 can be made to function as the storage portion 27. If the consumption amount in the flat knitting machine 2 is detected, the remaining amount in the storage unit 27 can be detected by subtracting it from the storage amount of the warp 9 in the storage unit 27. Further, in the downstream portion 26 on the downstream side of the storage portion 27, a mechanism similar to the thread consumption detection mechanism 23 in FIG. 2 may be provided in the lateral path shown in FIG. Such a mechanism can detect that the slack in the storage unit 27 with respect to the warp 9 having a small remaining amount becomes small. When the roller 21 is opened, the low-consumption warp 9 remaining in the holder 28 returns to the upstream portion 25. The warp 9 returning to the upstream portion 25 is fed out from the creel 10 because the warp 9 is supplied to the downstream portion 26 again when the roller 21 rotates in the closed state and supplies the warp 9 from the upstream portion 25 to the downstream portion 26. The number of warp threads 9 to be formed is reduced. In this way, the feeding of the warp 9 from the creel 10 is adjusted according to consumption.

FIG. 4 shows a simplified configuration of the yarn supply device 29 to the knitting machine according to the second embodiment of the present invention. The configuration of the portion not shown is the same as that of the first embodiment. Similar to the roller 21 of the first embodiment, the roller 31 of the feed mechanism 30 has a notch portion 31a whose outer periphery is partially cut out. The direction in which the plurality of warp threads 9 are supplied from the upstream portion 25 to the downstream portion 26 is the lateral direction. The gravity applied to the plurality of warps 9 is arranged so as to be larger in the upstream portion 25 than in the downstream portion 26. The plurality of warp threads 9 can pass sideways through the gaps between the rollers 31 in the open state. The outer periphery of the roller 31 excluding the notch portion 31a is closed when the facing portions come into contact with each other, and the plurality of warp threads 9 can be fed at the same time by rotating. The rotation of the roller 31 is driven by a motor (not shown). In the second embodiment, the roller 31 is rotated in a closed state, and the warp 9 is temporarily supplied to the downstream portion 26 to cause slack.

FIG. 5 shows an open state of the roller 31. The length of the warp 9 as a supply path between the upstream portion 25 and the downstream portion 26 sandwiching the roller 31 is longer in the upstream portion 25. When the roller 31 is in the open state, the gravity acting on the warp 9 becomes larger in the upstream portion 25 than in the downstream portion 26, so that the warp 9 is pulled by the gravity and begins to return to the upstream portion 25. When the roller 31 is left open, the warp 9 returns to the upstream portion 25 to cause slack, and the storage portion 27 is formed. The warp 9 is supplied from the storage unit 27 to the flat knitting machine 2 in the same manner as in the first embodiment with the roller 31 open. Although not shown, the roller 31 can be driven in the same manner as in the first embodiment by providing the yarn consumption detecting mechanism 23 in the storage portion 27 and detecting the yarn consumption based on the slack of the warp yarn 9. It is also possible to stop the closed roller 31 in the state of FIG. 4 and make the downstream portion 26 function as the storage portion 27.

FIG. 6 shows a simplified configuration of the feed mechanism 40, which is an application embodiment of the second embodiment. The roller 41 of the feed mechanism 40 has a plurality of notches 41a and 41b, for example, two notches 41a and 41b, and can switch between an open state and a closed state by rotation and operate in the same manner as the feed mechanism 30. The outer periphery of the roller 41 is supported by contacting the receiving member 42 provided at least in the middle in the width direction from above and below. Since the roller 41 becomes longer in the knitting width direction perpendicular to the paper surface, it may bend due to gravity in the middle of the knitting width. The receiving member 42 is reinforced so that the roller 41 does not easily bend. The rollers 31 of FIGS. 4 and 5 can be reinforced in the same manner. The figure shows a state in which the roller 41 is stopped while supplying the warp 9 to the downstream portion 26, and the storage portion 27 is provided in the downstream portion 26. Although not shown, the storage unit 27 is provided with a mechanism similar to that of the thread consumption detection mechanism 23. Depending on the consumption of the warp 9 in the storage portion 27, a difference occurs in the warp 9 that returns to the upstream portion 25 when the roller 41 opens, and the roller 41 closes to supply the warp 9 from the upstream portion 25 to the downstream portion 26. At this time, it is adjusted as a difference in the length of the warp 9 unwound from the creel 10. The switching of opening and closing by driving the roller 41 may be performed as described above according to the decrease in the slack of the warp 9 stored in the storage unit 27.

FIG. 7 shows a simplified configuration of the feed mechanism 50 of the yarn supply device 49 to the knitting machine according to the third embodiment of the present invention. The feed mechanism 50 makes it possible to move between the axes of the pair of rollers 51, and makes it possible to switch between the rollers 51 in a closed state shown by a solid line and an open state shown by a broken line. The operation of switching between the closed state and the open state may be performed in the same manner as in other embodiments. When the storage portion 27 is provided in the downstream portion 26 as shown in the figure, the warp yarn 9 is supplied to the weft knitting machine 2 by closing and stopping the space between the rollers 51. It is also possible to provide the storage portion 27 in the upstream portion 25 and stop the space between the rollers 51 in an open state to supply the warp 9 to the flat knitting machine 2. The decrease in the slack of the warp 9 in the reservoir 27 is detected by providing a mechanism similar to that of the thread consumption detection mechanism 23. In the third embodiment, the rollers 51 are arranged vertically as in the second embodiment, but they can be arranged side by side as in the first embodiment. In any case, the operation can be performed in the same manner as in the second embodiment or the first embodiment. Although the feed mechanism 50 includes a roller 51 which is a feed member and a drive unit that opens and closes between the rollers 51, the illustration of the drive unit is omitted. The feed member may be a member that circulates, such as a belt, or may be a member that repeatedly reciprocates for a certain section, moves in a state where the warp 9 is sandwiched in the outward path, and moves in a state where the return path is released. Such a feed member can switch between a closed state in which a plurality of threads are simultaneously sandwiched and restrained and an open state in which the plurality of threads are released, and in the closed state, the plurality of threads are fed from the upstream portion and supplied to the downstream portion. In the open state, it is sufficient to allow a plurality of threads to return from the downstream part to the upstream part by gravity.

In each embodiment, the warp threads 9 for insertion are simultaneously supplied to the flat knitting machine 2, but the present invention is similarly applied to other types of knitting machines as long as the application is to supply a plurality of threads at the same time. Can be applied to. When the present invention is applied, a plurality of yarns are stored in at least one of the upstream portion 25 or the downstream portion 26 in which the feed member is interposed as an increase due to gravity, and the stored yarns can be supplied to the guide mechanism 27. Is provided. Since the feed member allows a plurality of threads to return from the downstream portion 26 to the upstream portion 25 by gravity in the open state, the length of the threads stored in the storage portion 27 is adjusted. Since the plurality of yarns are fed out from the yarn source 10 according to the consumption of each yarn, stored in the storage unit 27, and supplied from the storage unit 27 to the knitting machine, they are necessary even if the consumption is different. A length of thread can be supplied.

Although the driving means of the feed mechanism drives the roller 21 according to the detection of the sensor 23d in the first embodiment, the rollers 21, 31, and 41 of the first and second embodiments may be continuously rotated. can. The cutout portions 21a, 31a, 41a, 41b may be provided only on the rollers 21, 31, 41 on one side. By including at least one roller 21, 31, 41 having notches 21a, 31a, 41a, 41b in at least a part of the outer circumference of the feed member, the driving means is displaced by the angular displacement of the rollers 21, 31, 41. It is possible to switch between the closed state and the open state. The rollers 21, 31 and 41 may control the rotation according to preset knitting conditions such as a set value of the consumption amount of the knitting yarn and an actually measured value. Unless the rotation speed is such that the supply is insufficient, the length of the warp 9 stored in the storage unit 27 is adjusted by repeating the open state and the closed state.

1,29,49 Thread supply device to knitting machine 2 Weft knitting machine 3 Front needle bed 4 Rear needle bed 5 Tooth opening 8 Warp pipe 9 Warp 10 Creel 11, 12, 13, 14 Thread source reel 20, 30, 40, 50 Feeding mechanism 21, 31, 41, 51 Roller 21a, 31a, 41a, 41b Notch 21b Roller position detection part 23 Consumption detection mechanism 25 Upstream part 26 Downstream part 27 Storage part

Claims (5)

In a knitting machine provided with a guide mechanism capable of simultaneously supplying a plurality of yarns when knitting a knitted fabric, in a yarn supply device to the knitting machine for simultaneously supplying the plurality of yarns to the guide mechanism.
A yarn source that holds the plurality of yarns so that they can be fed out, and
An upstream portion that serves as a path for the plurality of yarns drawn from the yarn source, and
A downstream portion that serves as a path for sending the plurality of threads (9) to the knitting machine,
Including a feed member provided between the upstream portion and the downstream portion.
The feed member is
It is possible to switch between a closed state in which the plurality of threads are sandwiched and restrained at the same time and an open state in which the plurality of threads are released.
In the closed state, the plurality of threads are fed from the upstream portion and supplied to the downstream portion.
In the open state, the plurality of yarns are allowed to return from the downstream portion to the upstream portion by gravity, and are provided in the upstream portion or the downstream portion, and the plurality of yarns are stored and stored as an increase in slackening due to gravity. A storage unit capable of supplying the plurality of threads to the guide mechanism,
A yarn feeding device for a knitting machine, further comprising a driving means for driving a feed member so that an open state and a closed state can be switched. The feed member is arranged so that the direction of feeding the plurality of threads from the upstream portion to the downstream portion is from the lower side to the upper side.
The driving means drives a feed member so as to supply a plurality of threads from the lower side to the upper side in the closed state and then return the plurality of threads from the upper side to the lower side in the open state.
The storage section is provided in the upstream section and is provided.
The yarn supply device for a knitting machine according to claim 1, wherein the plurality of yarns supplied to the guide mechanism pass through a feed member in an open state from a storage unit. The feed member is arranged so that the direction of supplying the plurality of threads from the upstream portion to the downstream portion is the lateral direction, and the gravity applied to the plurality of threads is larger in the upstream portion than in the downstream portion.
The storage section is provided in the upstream section and is provided.
The driving means is
After driving the feed member in the closed state and supplying multiple threads from the upstream part to the downstream part,
By opening and stopping the feed member, it is possible for multiple yarns to return from the downstream portion to the upstream portion of the reservoir.
The yarn supply device for a knitting machine according to claim 1, wherein the plurality of yarns supplied to the guide mechanism pass through a feed member in an open state from a storage unit. The feed member is
Includes at least one roller with a notch in at least a portion of the outer circumference, including
The thread supply device for a knitting machine according to any one of claims 1 to 3, wherein the closed state and the open state are switched by the angular displacement of the roller. The driving means is
In the storage unit, the slack of the plurality of threads is detected, and the slack is detected.
The knitting machine according to any one of claims 1 to 4, wherein when the slack of at least one yarn becomes smaller than a preset reference, the feed member is driven in the closed state. Thread supply device.

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