TWI518220B - Feeding device for circular knitting machine - Google Patents

Description

Yarn feeding device for circular knitting machine

The present invention relates to a yarn feeding device for feeding a yarn to a circular knitting machine, in particular, a circular knitting machine having a yarn changing device and a circular jacquard knitting machine.

The prior art documents are known in the art, for example, Japanese Patent Publication No. Sho 61-4777 and Japanese Patent Application Laid-Open No. Hei No. Hei No. Hei 10-273858. It is suitable for a circular knitting machine having a yarn converting device (changing device) that supplies a yarn of a multi-color yarn to a knitting machine as needed.

In general, the belt-driven yarn feeding device used in the circular knitting machines is provided with an endless (annular) belt that travels through a plurality of driving wheels, which are usually used together with the knitting machine during the operation of the knitting machine. The yarn feeding wheel that is driven integrally with the driving wheel driven by the endless belt is covered by a stretchable resin tape such as a rubber belt having a friction surface having a large frictional force. . A fixed yarn guide having an introduction hole and a discharge hole on each of the yarn inlet side and the yarn outlet side is disposed adjacent to the yarn feeding wheel, and a yarn guiding hole having a guiding yarn at the front end and the yarn feeding along the yarn feeding hole The movable guide of the circular motion of the surface of the wheel is in a position opposite to each other. The movable yarn guide is provided with an elastic device for driving the movable yarn guide to move along the surface of the yarn feeding wheel to reduce the contact angle of the yarn to the non-feeding state, and the circular knitting machine The tension of the yarn selected by the yarn changing device to produce an elastic force greater than the elastic means forcing the movable yarn guide to move to the yarn feeding state. The yarn is fed into the knitting machine at a speed substantially the same as the peripheral speed of the surface of the yarn feeding wheel by the frictional force of the rubber band on the surface of the yarn feeding wheel.

When the above conventional device is used in a circular knitting machine having a yarn changing device, when the yarn is stopped, the movable yarn guide moves to a non-feeding state in which the yarn contact angle is reduced, and only a conventional device is known. The yarn does not completely leave the surface of the yarn feeding wheel and still has a part of contact. The contact yarn sometimes entangles on the friction surface of the yarn feeding wheel due to friction with the friction surface of the yarn feeding wheel or breaks due to friction. situation. Moreover, when used in a jacquard knitting machine, the amount of yarn required by the knitting machine required to match the pattern may be different from the amount of yarn fed from the yarn feeding device, and the yarn may be loosely entangled in the friction surface of the yarn feeding wheel. The situation happened. As a result, the yield of the knitting machine is reduced or the quality of the woven fabric is lowered.

Further, in the form of Japanese Patent Publication No. 61-47777, in order to prevent the yarn from being displaced to the non-feeding position without contacting the yarn guiding surface, the distance from the fulcrum of the yarn guiding device to the yarn guiding hole must be lengthened. In the lateral space in which the yarn feeding device is disposed, it is necessary to be wider, and in addition, the yarn guiding device is not long enough to achieve a rapid reaction.

The yarn feeding device of the circular knitting machine of the present invention comprises at least one yarn feeding wheel, a fixed yarn guide disposed adjacent to the yarn feeding wheel, at least two movable yarn guides, and a support for the movable yarn guide. The fixed yarn guide has a lead-in hole on the yarn inlet side and a lead-out hole on the yarn outlet side; the movable yarn guide is composed of a first movable yarn guide and a second movable yarn guide Each of the movable yarn guides has a yarn guide hole guiding the yarn to the front end, and moves along a surface of the yarn feeding wheel about a rocking axis that is offset from a central axis of the yarn feeding device; : The first movable guide has the first feasible circular motion a rocking member, the second movable yarn guide has a second rocking member capable of circular motion; the first rocking member is provided with a first elastic member capable of forming a resistance force of the yarn feeding tension of the yarn, and the second shaking The member is provided with a second elastic member capable of forming a resistance force of the yarn feeding tension of the yarn.

Preferably, the lower seat and the second rocking member are coupled by the second elastic member, and the second rocking member and the first rocking member are coupled by the second shaft and the first elastic member.

Preferably, the second movable guide is configured to move in a direction of travel of the yarn with a weaker force than the first movable guide, in other words, by a second elastic member corresponding to the second movable guide. The resistance force for forcing the second movable guide to move toward the traveling direction of the reverse yarn is set to force the first movable guide yarn by the first elastic member corresponding to the first movable guide The tendency of the device to move toward the direction in which the reverse yarn travels is weak.

More preferably, the second elastic member and the first elastic member are configured to bring at least one of the following functions (a) to (e):

(a) when the yarn feeding device is in the non-feeding state, the first movable guide is passed through the introduction hole, and the yarn of the second movable guide and the lead-out hole is kept out of contact with the yarn guide surface. .

(b) the force for causing the second movable guide to move in the traveling direction of the yarn by the yarn feeding tension of the yarn passing through the yarn guiding hole is large (strong) by the second elastic member When the second movable guide is forced to move in the traveling direction of the reverse yarn, the second movable guide moves from the non-feeding state to the first movable guide while maintaining the interval therebetween. Start state.

(c) after the second movable yarn guide reaches the position of the yarn feeding state, the first movable yarn guide is caused to move in the traveling direction of the yarn by the yarn feeding tension of the yarn passing through the yarn guiding hole When the force becomes large (strong) by the first elastic member corresponding to the first movable yarn guide to urge the first movable guide to move in the traveling direction of the reverse yarn, the first A movable yarn guide moves from the initial state to the yarn feeding state.

(d) the force that causes the first movable guide to move in the traveling direction of the yarn by the yarn feeding tension of the yarn passing through the yarn guiding hole becomes small (weak) by the first movable guide When the yarn feeder corresponds to the first elastic member to urge the first movable yarn guide to move in the traveling direction of the reverse yarn, only the first movable yarn guide moves from the yarn feeding state to the initial state.

(e) when the force of the second movable guide moving in the traveling direction of the yarn by the yarn feeding tension of the yarn passing through the yarn guiding hole becomes small (weak) by the second When the movable guide corresponds to the second elastic member to urge the second movable guide to move in the traveling direction of the reverse yarn, the second movable guide and the first movable guide Keep the spacing and move together to the non-feeding position.

Preferably, the elastic force of the second elastic member and/or the first elastic member is configured to be adjustable by the elastic adjusting device.

The elastic force adjusting device may be a device that can be arbitrarily selected on the base, and can change the end setting position of the second elastic member, or can be arbitrarily selected on the base. A plurality of holes, and a rocking arm having a rocking arm at one end that can be inserted into the protrusion of the hole. Preferably, the rocker arm is formed by a leaf spring, and the protrusion is pushed into the hole by the spring force. Further, the elastic force adjusting device is not limited to the above configuration, and may be a mechanism for forming the rocker arm to be freely stopped within the moving range of the rocker arm.

Further, it is preferable that the above apparatus is provided with means for restricting the arcuate movement angle between the second rocking member and the first rocking member.

The means for restricting the arcuate motion angle between the two may be, for example, a combination of one of the pins and one of the interlocking grooves provided as one of the second rocking member and the first rocking member.

Preferably, the device is further provided with a stopper for restricting the circular motion of the movable guide for restricting the range of movement of the first movable guide and the second movable guide.

The stopper may be formed, for example, by a vertical portion that abuts the second movable guide and an arc-shaped holding portion that is disposed above the vertical portion, and the mechanical housing of the yarn feeding device is provided with the above-mentioned The arcuate groove of the holding portion is configured to hold the vertical portion so as to be movable in a circular arc along the circumferential surface of the yarn feeding wheel.

More preferably, the stopper is provided with an adjustment mechanism that adjusts the contact range of the yarn feeding wheel depending on the type of the yarn.

The adjustment mechanism may be formed, for example, by a plurality of notches provided in the holding portion, a ball corresponding to the notch provided on the casing, and a hole provided with a spring and a screw provided in the upper portion of the ball.

In another configuration, the first rocking member may be omitted from the first movable yarn guide, and the first movable yarn guide itself may be replaced by a single leaf spring.

According to the invention, the first movable guide and the second movable guide can be displaced along the yarn guiding hole and the lead-out hole along the circumference of the yarn guiding surface, and the first movable The yarn guide and the second movable yarn guide can increase or decrease the yarn feeding tension according to the required knitting pattern, move the yarn of the yarn guiding surface to increase the contact angle, and move to the yarn feeding position, or make the yarn guiding surface The increased contact angle of the yarn is reduced to move to the non-feeding position.

In the non-feeding position, the knitting yarn passing through the first movable guide, the second movable guide, and the lead-out hole from the introduction hole can be kept in a state of not contacting the yarn guiding surface, and therefore, the yarn The thread does not entangle with the friction surface of the yarn feeding wheel, or the yarn is broken due to friction.

When the non-feeding position is moved to the feeding position, as the yarn feeding tension increases, first, the second movable guide is moved toward the lead-out hole, and the first movement is linked to the second movable guide. a movable yarn guide that moves closer to the lead-out hole while maintaining the interval between the first movable yarn guide and the second movable yarn guide while being held in the non-feeding position, so that is, No excess yarn is produced by slack without the entanglement of the yarn on the friction surface of the yarn feeding wheel.

After the second movable guide moves to the limited maximum position, the first movable guide moves to the maximum position, and at this time, the angle of the yarn becomes maximum for the yarn guiding surface.

Further, when used for woven flowers whose yarn amount varies, since the yarn is given a tight length by a plurality of yarn guiding devices, the yarn does not loosen so as to be entangled with the friction surface of the yarn feeding wheel.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[Example 1]

4 shows a side view of a yarn feeding device 1 for feeding yarn to a circular knitting, the yarn feeding device 1 having a casing 2 which is fixed to the circular support ring 4 by screws 3. The front portion of the outer casing 2 has a shaft 6 supported by a ball bearing 5 as shown in FIG. A drive unit 7 is provided at the upper end of the shaft 6, and the drive unit 7 is constituted by two drive wheels 7a, 7b which are fixed to the shaft 6 by screws 8.

The yarn feeding device 1 is provided on a plurality of circular support rings 4, and an annular transmission belt 9 is wound around the driving wheels 7a, 7b. The annular transmission belts 9 are the same as the conventional transmission belts. Synchronous drive with the action of the circular knitting machine.

A clutch 12 that can be moved up and down to be set in a three-stage position is provided between the first drive wheel 7a and the second drive wheel 7b. When the clutch 12 is moved to the upper side, the rotation of the upper first drive wheel 7a is transmitted to the yarn feeding wheel 10, and when the lower side is moved, the rotation of the lower second drive wheel 7b is transmitted to the yarn supplying wheel 10. When the clutch 12 is moved to the intermediate position, the rotation of the upper and lower driving wheels 7a, 7b is not transmitted to the neutral position of the yarn feeding wheel 10.

A plurality of yarn feeding wheels 10 having a plurality of yarn feeding devices having at least one yarn guiding surface are provided at the lower portion of the shaft 6, and the yarn feeding wheels 10 are fixed to the shaft 6 by screws 11.

As shown in FIGS. 2 and 4, a fixed yarn guide 15 and at least two first movable yarn guides 16 and a second movable yarn guide 17 are provided adjacent to the yarn feeding wheel 10.

The fixed yarn guide 15 is provided with a yarn introduction hole 15a and a lead-out hole 15b at the yarn inlet side and the yarn outlet side, respectively.

The first movable guide 16 and the second movable guide 17 move in conjunction with each other between the introduction hole 15a and the lead-out hole 15b around the yarn guiding surface 10a. The first movable guide 16 and the second guide hole 17a for guiding the yarn are respectively provided at the front ends of the first movable guide 16 and the second movable guide 17. The first yarn guiding hole 16a and the second yarn guiding hole 17a are preferably made of a material such as a ceramic or ceramic which is resistant to friction of the knitting yarn and which is not easily worn.

As shown in FIG. 4, the fixed yarn guide 15, the first movable yarn guide 16, and the second movable yarn guide 17 are provided in plural numbers corresponding to the positions of the plurality of yarn feeding wheels 10.

Hereinafter, the structure and action of each yarn guide will be described in detail based on Fig. 5 which is partially enlarged in Fig. 2 .

One end of the base 18 is fixed in the vicinity of the introduction hole 15a of the fixed yarn guide 15 (refer to Figs. 2 and 4). The other end of the base 18 is pivotally connected with a first rocking member 21 and a second rocking member 19 which are pivoted about the second shaft 22, and the shaft portions of the first rocking member 21 and the second rocking member 19 are preferably provided with bearings. .

The first movable guide 16 is fixed to the first rocking member 21, and the second movable guide 17 is fixed to the second rocking member 19. The rocking member and the movable yarn guide may also be integrally molded by resin. Further, the second rocking member 19 has an extension portion, and a first pin 20 for locking the elastic member is provided at the end of the extension portion (see Fig. 5).

Further, the first rocking member 21 is provided with a guide groove 21a for regulating the arcuate movement angle, and the third pin 23 fixed to the second rocking member 19 is fitted into the guide groove 21a.

The second movable guide 17 is provided with a second elastic member 24 for adjusting the elastic force, and the second elastic member 24 is for reducing the contact angle of the yarn along the surface of the yarn feeding wheel 10 to make the second movable guide The yarn feeder 17 is moved to a non-feeding state. The second elastic member 24 preferably uses a tension spring, one end of which is hung on the base 18 and the other end of which is hung on the second rocking member 19. Moreover, as shown in FIG. 2, the base 18 is provided with a plurality of pins 26, and the one end of the base side of the second elastic member 24 is selectively moved to one of the pins 26 to adjust the second. The amount of elastic force of the elastic member 24.

The first movable guide 16 is provided with a first elastic member 25 for adjusting the elastic force, and the first elastic member 25 is for reducing the contact angle of the yarn along the surface of the yarn feeding wheel 10 to make the first movable guide The yarn feeder 16 is moved to a non-feeding state. Preferably, the first elastic member 25 is a tension spring, one end of which is hung on the first pin 20 of the second rocking member 19, and the other end of which is hung on the first rocking member 21. Further, although not shown, the first elastic member 25 may also have an adjustable elastic force as the second elastic member 25. For example, the spring force of the spring is adjusted by changing the spring of different elastic forces.

The second elastic member 24 and the first elastic member 25 are set to have the following relationship, that is, the elastic force of the elastic member is multiplied by the total force of the product of the force point of the elastic member to the point of action, and the second elastic member 24 should be It is weaker than the first elastic member 25.

Fig. 2 is a view showing the (a) non-feeding state, (b) initial state, and (c) yarn feeding state of the yarn feeding device 1.

As shown in Fig. 2(a), when the yarn supplying device 1 is in the non-feeding state, the weaving yarn comes out from the yarn introducing hole 15a via the first movable yarn guide 16, the second movable yarn guide 17, and the discharge hole 15b. And kept in a state of not contacting the yarn guide surface.

The second movable yarn guide 17 is driven by the yarn feeding tension of the yarn selected by the yarn changing device of the circular knitting machine, or the yarn amount required for the yarn amount of the pattern which varies with the pattern. The force of 117 moving in the direction of the yarn becomes greater than the second elastic members 24, 124 of the corresponding second movable guide 17, 117 forcing the second movable guide 17, 117 to reverse the direction of the yarn. When the resistance is moved, the second movable guides 17, 117 are moved from the non-feeding state to the initial state (movement A) while being spaced apart from the first movable guides 16, 116.

After the second movable guide 17 reaches the position of the yarn feeding state, the first movable yarn guides 16, 116 are further forced to move toward the yarn by the yarn feeding tension of the yarn passing through the yarn guiding holes 16a, 116a. The force becomes greater than the first elastic member 25, 125 corresponding to the first movable guide 16, 16, forcing the first movable guide 16, 116 to resist the direction of the reverse yarn, only the first movable The yarn guides 16, 116 are moved from the initial state to the yarn feeding state (motion B).

On the other hand, the force of the yarn moving by the yarn passing through the yarn guiding holes 16a, 116a forcing the first movable yarn guides 16, 116 to move in the direction of the yarn becomes weaker than that of the corresponding first movable yarn guide 16, When the first elastic members 25, 125 of the 116 force the first movable guides 16, 116 to resist the direction of the reverse yarn, only the first movable guides 16, 116 are moved from the yarn feeding state to the initial state ( Exercise C).

Then, the force of the second movable yarn guides 17, 117 moving in the direction of the yarn by the yarn feeding tension of the yarn passing through the yarn guiding holes 17a, 117a becomes weaker than the corresponding second movable yarn guide 17,117 When the second elastic members 24, 124 force the second movable guides 17, 117 to resist the direction of the reverse yarn, the second movable guide 17 and the first movable guide 16 are spaced apart from each other. Move to the non-feed position (motion D).

When the yarn quantity changes at any time, the yarn tension changes due to the necessary yarn amount, and the movement B and motion C are repeated to send the necessary yarn amount of the knitting machine while maintaining the yarn. The feeding yarn tension is fed into the knitting machine. Therefore, the yarn is loosened so that the problem of entanglement on the friction surface of the yarn feeding wheel can be eliminated.

When changing from the non-feeding state to the feeding state, in order to be able to limit the circular motion range of the second movable guide 17, in order to respond to the frictional resistance of the yarn guiding surface and the yarn, another second can be blocked. The stopper 27 of the movable yarn guide 17 (refer to Fig. 9). The stopper 27 is constituted by a vertical portion 27a that can block the second movable guide 17, and an arc-shaped holding portion 27b provided above the vertical portion 27a. The outer casing 2 of the yarn feeding device 1 is provided with an arcuate groove corresponding to the holding portion 27b, and the vertical portion 27a is held to be rotatable along the circumference of the yarn feeding wheel 10.

The stopper 27 is provided with adjustment mechanisms 2a and 27d which can adjust the contact range of the yarn with the yarn feeding wheel depending on the type of the yarn. This adjustment mechanism is composed of a plurality of notches 27d provided in the holding portion 27b and balls corresponding to the notches 27d provided on the outer casing 2. Above the ball is provided a hole 2a in which a spring and a screw are housed, and can be held by a plurality of notches 27d.

When the first and second movable guides 16, 17 are not in use, the rod portions 16b, 17b of the first and second movable guides 16, 17 are hooked to the L-shaped portion of the vertical portion 27a of the stopper. The inside of the groove 27c is kept fixed. In order to keep the movable guide, the L-shaped groove 27c is provided in this example, but the fixing device is not limited to the L-shaped groove.

For convenience, although not shown in the drawings, in actuality, the upper portion of the base 18 of FIGS. 2 and 5 is covered with a cover to prevent dust such as batt generated by the yarn from adhering to the rocking member or the elastic member.

[Embodiment 2]

In the second embodiment, the schematic configuration of the yarn feeding device is still as described in the first embodiment (please refer to the explanation of the full page on page 8). Therefore, the description of this portion will be omitted and will not be described again.

Hereinafter, the configuration and operation of each of the yarn guides will be described in detail with reference to FIG. 3 and a partial enlarged view of FIG.

One end of the base 118 is disposed in the vicinity of the yarn introduction hole 15a of the fixed yarn guide 15, (refer to FIG. 2 and FIG. 4), and the other end of the base 118 is pivotally connected by the fourth pin 100. The second rocking member 119 is a center of the circular motion member, and the second movable member 119 is fixed to the second rocking member 119.

One end of the second rocking member 119 is provided with a first rocking member 121 which is movable in a circular arc centered on the second shaft 122, and the first rocking member 121 is fixed with the first movable yarn guide 116. The base 18 is not directly connected to the first rocking member 121.

The second rocking member 119 is further provided with a first positioning member 119a and a second positioning member 119b that limit the arc motion angle of the first movable yarn guide 116.

The second movable guide 117 is provided with a second elastic member 124. In order to move the second movable thread guide 117 to a position where the contact angle of the yarn along the surface of the yarn feeding wheel 10 is reduced to a position which becomes a non-feeding state. Preferably, the second elastic member 124 is a tension spring, one end of which is hung on the base 118, and the other end is hung on the first pin 120 fixed to the central portion of the second rocking member 119.

The second elastic member 124 is configured to adjust the magnitude of its elastic force. As shown in FIG. 8, the base 118 is pivotally provided with a rocker arm 126 that can be rocked by a pivot point 126a provided at the center of the rocker arm. One end of the rocker arm 126 is provided with a protrusion 127. The protrusion 127 is movable on the circular path by the other end of the rocker arm 126. A plurality of holes 118a are formed in the circular path for the projections 127 to be engaged with and fastened. One end of the base side of the second elastic member 124 is supported between the fulcrum 126a of the rocker arm 126 and the protrusion 127. The elastic force of the second elastic member 124 can be adjusted by selectively moving the protrusion 127 to one of the plurality of holes 118a. Preferably, the rocker arm 126 is a leaf spring, and the protrusion 127 is pressed by the elastic force. Further, the elastic force adjusting device is not limited to the above configuration, and a mechanism for freely locking the rocker arm within the moving range of the rocker arm is also possible.

Referring back to FIG. 6, the first movable guide 116 is provided with a first elastic member 125 to move the first movable guide 116 to reduce the contact angle of the yarn along the surface of the yarn feeding wheel 10 to a non-feeding state. The location. Preferably, the first elastic member 125 is a torsion spring, and one end thereof is hooked on the first pin 120 provided at the central portion of the second vibrating member 119, and the other end is wound around the central portion of the first rocking member.

The second movable guides 17,117 are set to be movable in the direction of the yarn weaker than the force of the first movable guide 16, 116, in other words, by corresponding to the second movable guide 17,117 The second elastic members 24, 124 force the second movable guides 17, 117 to resist the direction of the reverse yarn, and are set to be relatively larger than the first elastic members 25 corresponding to the first movable guides 16, 116. , 125 forces the resistance of the first movable guide 16, 16, to move in the direction of the reverse yarn to be weak.

The functions and effects of the respective yarn guides of the second embodiment are substantially the same as those of the first embodiment (please refer to pages 10 to 11), and therefore, the description thereof will not be repeated.

[Efficacy Confirmation Experiment]

Prepare an electronic jacquard knitting machine V-LEC3DGTY6 with a thread adjusting device made by Fukuhara Seiki Co., Ltd., 34-inch, 18-gauge (gauge), polyester wire 84 dtex/36 filament, and perform the following weaving test.

Used in the case of stripe weaving, when the yarn is changed from the stopped state to the feeding state: As shown in Table 1, the movable yarn guide maintains the relationship of the tension state of the yarn, that is, the slack of the excess yarn, and thus the yarn is not entangled in the friction surface of the yarn feeding wheel.

b) When the yarn is woven, the yarn is stopped.

As shown in Table 2, since the yarn is completely out of contact with the surface of the yarn feeding wheel, no yarn is entangled in the friction surface of the yarn feeding wheel and the yarn is broken due to friction.

c) used in jacquard weave

As shown in Table 3, since the yarn tension is imparted by a plurality of yarn guides, the yarn does not slack, and the yarn is entangled in the friction surface of the yarn.

As is apparent from the above experimental results, according to the present invention, the working efficiency and the weaving quality of the knitting machine can be improved, and the lateral mounting space required for the yarn feeding device to be mounted on the circular knitting machine is the same as that of the conventional device.

[Example 3]

10 and 11 show that the third embodiment of the present invention differs from the second embodiment in that only the first rocking member is omitted, and the first movable yarn guide 216 itself is replaced by a single leaf spring. In the embodiment 3, the components corresponding to the embodiment 2 are denoted by the same numerals except that the 100 (hundred) digits of the component symbols in the embodiment 2 are changed from 1 to 2, and the detailed description thereof is omitted. . The effects of this embodiment 3 are similar to those of the first and second embodiments.

[Possibility of industrial use]

The device provided by the invention is a yarn feeding device suitable for a circular knitting machine, in particular, a circular knitting machine with a yarn changing device and a circular jacquard knitting machine, which can effectively improve the yarn from the yarn. The type is changed so as to entangle the friction surface of the yarn feeding wheel, or the yarn is broken by the rubber band of the yarn feeding wheel to cause yarn breakage.

1. . . Yarn feeding device

2. . . shell

3,8,11. . . Screw

4. . . Support ring

5. . . Bearing

6,122. . . axis

7. . . Drive unit

7a. . . First drive wheel

7b. . . Second drive wheel

9. . . Transmission belt

10. . . Feeding wheel

12. . . clutch

15. . . Fixed yarn guide

15a. . . Yarn introduction hole

15b. . . Yarn export hole

16,116,216. . . First movable guide

16a, 116a, 216a. . . First guide hole

16b, 17b. . . Rod

17,117,217. . . Second movable guide

17a, 117a, 217a. . . Second guide hole

27. . . Stopper

27a. . . Vertical part

27b. . . Holding department

27c. . . L-shaped groove

126,226. . . Rocker arm

126a. . . Pivot

127. . . Protrusion

18,118,218. . . Pedestal

118a. . . hole

19,119,219. . . Second shaking member

119a, 119b. . . Positioning member

21,121. . . First shaking member

122. . . axis

219. . . Guide groove

24,124,224. . . Second elastic member

25,125. . . First elastic member

20,23,26,100,120,200,220. . . pin

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a plan view showing a prior art yarn feeding device, wherein (a) shows a non-feeding state and (b) shows a yarn feeding state.

Fig. 2 is a plan view showing a yarn feeding device according to a first embodiment of the present invention, wherein (a) shows a non-feeding state, (b) shows an initial state, and (c) shows a yarn feeding state.

Fig. 3 is a plan view showing a yarn feeding device according to a second embodiment of the present invention, wherein (a) shows a non-feeding state, (b) shows a starting state, and (c) shows a yarn feeding state.

Fig. 4 is a side view showing the yarn supplying device of the present invention provided in a circular knitting machine.

5(a) to 5(c) are partially enlarged schematic views showing the yarn supplying device of the first embodiment of the present invention.

6(a) to 6(c) are partially enlarged schematic views showing the yarn supplying device of the second embodiment of the present invention.

Figure 7 is a partial longitudinal sectional view showing the periphery of the drive pulley.

Fig. 8 is a partially enlarged view showing the elastic force adjusting mechanism of the second elastic member.

Figure 9 is a schematic view showing a stopper for limiting the range of motion of the arc of the second movable yarn guide.

Fig. 10 is a partially enlarged schematic view showing the yarn supplying device of the third embodiment of the present invention.

Fig. 11 is a plan view showing a yarn supplying device according to a third embodiment of the present invention, wherein (a) shows a non-feeding state, (b) shows a starting state, and (c) shows a yarn feeding state.

1. . . Yarn feeding device

2. . . shell

3. . . Screw

4. . . Support ring

6. . . axis

7. . . Drive unit

9. . . Transmission belt

10. . . Feeding wheel

11. . . Screw

12. . . clutch

15. . . Fixed yarn guide

16,116. . . First movable guide

17,117. . . Second movable guide

16a, 116a. . . First guide hole

17a, 117a. . . Second guide hole

Claims (15)

A yarn feeding device for a circular knitting machine comprises at least one yarn feeding wheel, a fixed yarn guide disposed adjacent to the yarn feeding wheel, at least two movable yarn guides, and a base for supporting the movable yarn guide The fixed yarn guide has a lead-in hole on the yarn inlet side and a lead-out hole on the yarn outlet side, and the movable yarn guide is composed of a first movable yarn guide and a second movable yarn guide. The movable yarn guide has a yarn guiding hole for guiding the yarn to the front end, and moves along a surface of the yarn feeding wheel centering on a rocking axis which is located away from a central axis of the yarn feeding device; The first movable guide has a first rocking member capable of circular motion, and the second movable guide has a second rocking member capable of circular motion; the first rocking member is provided with a yarn feeding tension capable of forming a yarn a first elastic member of the resistance force, wherein the second rocking member is provided with a second elastic member capable of forming a resistance force of the yarn feeding tension of the yarn, by the second elastic member corresponding to the second movable yarn guide To force The resistance force of the second movable guide moving toward the traveling direction of the reverse yarn is set to force the first movable guide yarn by the first elastic member corresponding to the first movable guide The tendency of the device to move toward the direction in which the reverse yarn travels is weak. The yarn feeding device of claim 1, wherein the base and the second rocking member are coupled by the second elastic member, and the second shaking The member and the first rocking member are coupled by the second shaft and the first elastic member. The yarn feeding device of claim 1 or 2, wherein the second elastic member and the first elastic member are configured to bring about at least one of the following (a) to (e): (a) feeding the yarn When the device is in the non-feeding state, the first movable guide is passed through the introduction hole, and the yarn of the second movable guide and the lead-out hole is kept out of contact with the yarn guide surface; (b) The force of the yarn feeding through the yarn of the yarn guiding hole to urge the second movable yarn guide to move in the traveling direction of the yarn is large (strong) to correspond to the second movable yarn guide by the above When the two elastic members force the resistance of the second movable guide to move in the traveling direction of the reverse yarn, the second movable guide is kept from the non-feeding while maintaining the interval with the first movable guide. The yarn state is moved to the initial state; (c) after the second movable yarn guide reaches the position of the yarn feeding state, the first movable yarn guide is urged by the yarn feeding tension of the yarn passing through the yarn guiding hole If the force moving in the direction of travel of the yarn becomes large (strong) by the first When the movable guide corresponds to the first elastic member to urge the first movable guide to move in the traveling direction of the reverse yarn, the first movable guide moves from the initial state to the feeding state; (d) the force that causes the first movable guide to move in the traveling direction of the yarn by the yarn feeding tension of the yarn passing through the yarn guiding hole becomes small (weak) by the first movable guide The first corresponding to the yarn feeder When the elastic member urges the first movable guide to move in the traveling direction of the reverse yarn, only the first movable guide moves from the feeding state to the initial state; and (e) when passing through The yarn feeding tension of the yarn of the yarn guiding hole causes the force of the second movable yarn guide to move in the traveling direction of the yarn to become small (weak) by the above-mentioned first corresponding to the second movable yarn guide When the two elastic members urge the second movable guide to move in the traveling direction of the reverse yarn, the second movable guide moves to the non-moving position while maintaining the interval with the first movable guide. Feeding position. The yarn feeding device of claim 1 or 2, wherein the elastic adjusting device is disposed to adjust the elastic force of the second elastic member and/or the first elastic member. The yarn feeding device of claim 4, wherein the elastic adjusting device is a device that is arbitrarily selectable on the base and that can change the end setting position of the second elastic member. The yarn feeding device of claim 4, wherein the elastic adjusting device is composed of a plurality of holes arbitrarily selectable on the base, and a rocking arm having a rocking arm at one end which can be inserted into the protrusion of the hole. The yarn feeding device of claim 1, wherein the device further comprises means for restricting a circular arc movement angle between the second rocking member and the first rocking member. The yarn feeding device of claim 7, wherein the means for restricting the arcuate movement angle between the ones is provided on one of the third pins and the other of the interlocking grooves. The yarn feeding device of claim 7, wherein the means for restricting the arcuate movement angle between the two is provided in one of the second rocking member and the first rocking member. The yarn feeding device of claim 1, wherein the device is further provided to limit the movement range of the first movable guide and the second movable guide to limit the circular motion of the movable guide. Stopper. The yarn feeding device of claim 10, wherein the stopper is constituted by a vertical portion that abuts the second movable yarn guide and an arc-shaped holding portion that is disposed above the vertical portion, and the yarn feeding device An arc-shaped groove corresponding to the holding portion is provided on the casing so that the vertical portion is held to be movable in a circular arc along the circumferential surface of the yarn feeding wheel. The yarn feeding device of claim 11, wherein the stopper is provided with an adjustment mechanism for adjusting a contact range of the yarn feeding wheel depending on a yarn type. The yarn feeding device of claim 12, wherein the adjusting mechanism is provided by a plurality of notches provided in the holding portion, a ball corresponding to the notch disposed on the casing, and a spring disposed in the upper portion of the ball The hole of the screw is formed. A yarn feeding device for a circular knitting machine comprises at least one yarn feeding wheel, a fixed yarn guide disposed adjacent to the yarn feeding wheel, at least two movable yarn guides, and a base for supporting the movable yarn guide The fixed yarn guide has a lead-in hole on the yarn inlet side and a lead-out hole on the yarn outlet side, and the movable yarn guide is composed of a first movable yarn guide and a second movable yarn guide. The movable yarn guide has a yarn guiding hole for guiding the yarn to the front end, and is located at a position deviating from the central axis of the yarn feeding device. The rocking shaft has a circular arc along the surface of the yarn feeding wheel; wherein the first movable yarn guide is composed of a first elastic member capable of forming a resistance force of the yarn feeding tension of the yarn, and the above The second movable guide has a second rocking member that is movable in a circular arc, and the second rocking member is provided with a second elastic member capable of forming a resistance force of the yarn feeding tension of the yarn. The yarn feeding device of claim 14, wherein the first movable yarn guide is constituted by a leaf spring.