CN220099325U - Knitted fabric sheeting device of flat knitting machine - Google Patents

Abstract

The utility model provides a knitting fabric sheeting device of a flat knitting machine, which can realize stabilization of loop transfer by disabling bristles even if loop forming sheeting is performed. The knitted fabric presser device (2) prevents the brush hair (6) from acting, and even if the latch needle (5) at the transfer side of the loop is raised higher than the tooth mouth (4) during loop forming, the latch needle (5) can not be contacted and toppled. Since the latch needle (5) on the transfer side does not fall, transfer failure caused by inconsistent timing of transfer with the latch needle (5) on the receiving side can be avoided, and transfer can be stabilized.

Description

Knitted fabric sheeting device of flat knitting machine

Technical Field

The present utility model relates to a knitting fabric presser device for a flat knitting machine, which is mounted on a carriage of the flat knitting machine and advances and retreats a loop forming presser of a knitting fabric knitted by pressing the loop forming presser against a needle bed gap.

Background

Conventionally, a flat knitting machine is provided with at least one pair of needle beds so as to face each other across a needle bed gap. A plurality of needle grooves are arranged in parallel on each needle bed. The knitting needle accommodated in each needle groove is separated so as to correspond to the front and rear needle beds, and knitting is performed while being driven by a cam system mounted on a carriage. The knitted fabric presser device is also mounted on the carriage in a pair from front to rear, and has a loop presser that can be switched between active and inactive. The loop pressing piece has pressure bars extending in the front-rear direction to one side and the other side in the knitting width direction, respectively. When the looping and tabletting is performed, the pressure bar extending in the direction opposite to the traveling direction of the carriage is made to enter the tooth mouth and act, and the other pressure bar is made to exit from the tooth mouth and does not act. The pressure bar acting on the knitting machine presses the knitted fabric at the needle bed gap, prevents the old stitch from lifting up together with the knitting needle, and reliably withdraws the old stitch, thereby reliably releasing the stitch as a result. If the knitting needle is a latch needle, the needle hook is opened and closed through the latch needle. The knitted fabric presser device further includes bristles for opening the latch. The brush hair contacts with a latch for closing a hook of a knitting needle entering a needle bed gap from an opposite needle bed at the front end thereof, and the hook is opened. When the loop forming presser advances and retreats relative to the tooth mouth, the loop forming presser breaks the bristles when the bristles at the action position contact the loop forming presser, and therefore the knitted fabric presser device also has a function of retracting the bristles to avoid interference with the loop forming presser (for example, refer to patent document 1).

[ Prior Art literature ]

[ patent literature ]

Japanese patent application laid-open No. 2012-117188 (patent document 1)

Disclosure of Invention

[ problem ] to be solved by the utility model

In the conventional knitted fabric presser device as described in patent document 1, the bristles are retracted to a position separated from the loop-forming presser only when the pressure bar advances and retreats relative to the tooth mouth during the loop-forming presser. The transfer in the case where the knitting needle is a latch needle is performed using a transfer blade provided on the needle bar side away from the hook. The knitting needle on the side that is handed over the stitch moves the stitch from the hook to the blade by relative movement based on entry to the mouth of the tooth. The knitting needle on the side receiving the stitch entering from the opposite needle bed side to the needle bed gap receives the stitch from the blade to the hook. Therefore, during transfer, the knitting needle on the side that is handed over the stitch needs to enter the slit to the portion of the blade, and the needle hook at the front end rises higher at the slit than during looping. If the bristles of the knitted fabric presser mounted on the traveling carriage act on the needles that rise high, the timing of the transfer between the needles on the transfer side and the needles on the receiving side does not coincide with each other, and there is a possibility that a transfer failure may occur. In particular, if the fine pitch in which knitting needles are densely arranged is made to be capable of knitting fine knitting yarns or the like, the possibility of instability due to poor transfer becomes significant.

The utility model aims to provide a knitted fabric tabletting device of a flat knitting machine, which can realize stable loop transfer by enabling bristles to be not acted even if loop forming tabletting is acted.

[ means for solving the problems ]

The utility model provides a knitted fabric sheeting device of a flat knitting machine, which is a flat knitting machine provided with at least one pair of needle beds in a manner of being opposite to each other in front and back by sandwiching a tooth mouth, and each needle bed is provided with a latch needle as a knitting needle,

the knitting fabric presser device of the flat knitting machine is mounted on a carriage that reciprocates in a longitudinal direction of a needle bed, switches between a position where a loop forming presser that presses a knitted fabric is applied and a position where the loop forming presser is not applied and is separated from the knitted fabric,

during switching, the bristles of the latch needle can be retracted from the acting position in a mode that the looping press piece is not contacted,

the knitted fabric sheeting device of the flat knitting machine is characterized in that,

comprises a switching mechanism which switches the position of the bristles between active and inactive with respect to the respective active and inactive positions of the looping press blade.

In addition, the present utility model is characterized by comprising a motor as a single driving source,

the switching mechanism includes:

a pressing swing part for swinging and displacing the looped pressing sheet through the rotation output of the motor; a kind of electronic device with high-pressure air-conditioning system

A bristle swinging part for swinging and displacing the bristles,

the switching between the active position and the inactive position of the looped presser and the brush is performed at a position midway in the oscillating displacement caused by the rotation of the motor.

In the present utility model, the switching between the active position and the inactive position includes a state in which the looped sheet is inactive and the bristles are inactive.

In the present utility model, the switching between the active position and the inactive position includes a state in which the looped sheet is active and the bristles are inactive.

In the present utility model, the motor is a stepping motor, and is characterized by

The switching of the combination of the action and the non-action of the bristles, as opposed to the action and the non-action of the looped sheeting, is controlled by the pulse number driving a stepper motor.

[ Effect of the utility model ]

According to the present utility model, the switching mechanism can switch the brush to the inactive position, regardless of the position where the looped presser is active or inactive. As the stitch length of the flat knitting machine becomes finer, the knitting needles become finer. If the brush is moved to the inactive position, the brush does not act on the knitting needle that is raised to the transfer side of the tooth mouth during the transfer, and therefore the knitting needle does not fall. Since the knitting needles on the transfer side do not fall down, the transfer failure caused by the timing of the transfer with the knitting needles on the receiving side being inconsistent can be avoided, and the transfer can be stabilized.

Further, according to the present utility model, the driving and stopping of the motor can be controlled, and the combination of the action and the non-action of the loop sheet and the brush can be switched.

In addition, according to the present utility model, even when the loop forming presser is rendered inactive according to the traveling direction of the carriage, the brush is rendered inactive, and the loop transfer failure can be avoided.

Further, according to the present utility model, the bristles are switched to the inactive position at the position where the loop forming and pressing work is performed, and the loop transfer can be performed stably while avoiding the loop transfer failure by pressing the knitted fabric with the pressure bar.

Further, according to the present utility model, the number of pulses for driving the stepping motor can be controlled, so that the switching between the operation and the non-operation of the loop sheet and the brush can be reliably performed.

Drawings

Fig. 1 is a simplified left side sectional view of a flat knitting machine 1 of a first embodiment of the present utility model.

Fig. 2 is a plan view of the knitted fabric sheet pressing apparatus 2.

Fig. 3 (a) and 3 (b) are partial left side views schematically showing the structure and operation of the knitted fabric tabletting device 2.

Fig. 4 (a) and 4 (b) are partial left side views showing the structure and operation of the knitted fabric tabletting device 2 in a simplified manner, following fig. 3 (a) and 3 (b).

[ reference numerals description ]

1. Flat knitting machine

2. Knitted fabric tabletting device

3. Needle bed

4. Tooth mouth

5. Latch needle

5a needle hook

5b latch

5c blade

6. Brushing hair

7. Looping tabletting

7a pressure bar

10. Switching mechanism

16. Bristle swinging part

17. Tablet swing part

Detailed Description

Hereinafter, fig. 1 to 4 (a) and 4 (b) show a simplified structure and operation of a knitted fabric presser device 2 of a flat knitting machine 1 according to an embodiment of the present utility model. Fig. 1 also shows an operation of stabilizing the loop transfer in the flat knitting machine 1. In the drawings, corresponding parts are denoted by the same reference numerals, and duplicate description may be omitted. For convenience of explanation, a portion not shown in the drawing is present, and a portion existing on the front side may be indicated by a two-dot chain line of a thin line.

[ example ]

As shown in fig. 1, the flat knitting machine 1 includes a knitting fabric presser 2, and includes at least one pair of needle beds 3 that face each other across a needle bed gap 4, and each needle bed 3 includes a latch needle 5 as a knitting needle. The needle bed 3 has needle grooves arranged in parallel in a longitudinal direction perpendicular to the drawing sheet, and latch needles 5 are accommodated in the respective needle grooves. The latch needle 5 is slidable in the needle groove, and when slid, the needle hook 5a at the tip is advanced and retracted relative to the tooth opening 4. The needle bed 3 is inclined so that the needle bed gap 4 side is raised, the hook 5a is lifted up toward the needle bed gap 4, the knitting yarn supplied to the hook 5a is received from above the needle bed gap 4, and the needle hook 5a is lowered to draw in the needle bed 3 side, thereby forming a new stitch. In knitting the knitted fabric, knitting of the knitted fabric is performed while repeatedly forming a new stitch, and the stitch formed before forming the new stitch becomes an old stitch, and is released from the hook 5a and hangs down toward the welt 4. The latch needle 5 is driven to slide by a cam system mounted on a carriage that reciprocates in the longitudinal direction of the needle bed 3. The knitting fabric presser device 2 is further mounted on the carriage. Latch needle 5 opens and closes hook 5a by latch 5b. If the needle hook 5a is closed by the latch 5b, the knitting yarn cannot be received in the mouth 4, so that the bristles 6 for opening the latch 5b are also provided in the knitting fabric presser 2. In addition, the latch needle 5 also has a blade 5c for transferring loops. In the transfer, the latch needle 5 on the transfer side is raised higher than the needle bed gap 4 during the knitting, and the loop in the hook 5a is moved relatively to the blade 5c. The latch needle 5 on the receiving side makes the hook 5a enter the blade 5c to receive the loop. The knitted fabric presser device 2 further includes a loop forming presser 7 as described later, but is not shown in fig. 1.

The knitted fabric presser device 2 shown in fig. 2 is provided for each cam system mounted on the carriage. For example, if three cam systems are arranged on each needle bed 3, the knitted fabric presser device 2 is also arranged with three groups on each needle bed 3. Each knitted fabric presser device 2 includes a bristle 6, and further includes a looping presser 7, the looping presser 7 having a pressure bar 7a pressing the old loop after the looper at the mouth 4. The loop pressing piece 7 has a substantially L-shape, and the pressure bar 7a has a shape extending in one direction of the knitting width direction. Since the illustrated pressure bar 7a extends rightward, the looping press piece 7 enters the tooth opening 4 and is switched to a position that acts on the knitted fabric when the carriage travels leftward. When the carriage travels rightward, the illustrated loop forming presser 7 is withdrawn from the needle bed gap 4 to a position where it is inactive while leaving the knitted fabric, and the loop forming presser 7 on the opposite needle bed 3 side is switched to the active position. The pressure bar 7a presses the knitted fabric against the needle bed gap 4, prevents the old stitch from lifting up together with the latch needle 5 which enters the needle bed gap 4, and reliably withdraws the old stitch, thereby reliably releasing the stitch as a result. When the looped presser 7 is switched from the active position to the inactive position, the brush staples 6 are retracted to the inactive position, and interference is avoided.

The knitted fabric presser device 2 includes a switching mechanism 10 for switching the positions of the bristles 6 to active and inactive with respect to the respective active and inactive positions of the looping presser 7, and a motor 11 as a single driving source. The switching mechanism 10 includes: a bristle swinging part 16 supported by the bracket 12 and configured to swing and displace the bristles 6 by the rotational output of the motor 11; and a presser swing portion 17 supported by the base 13 for swinging the looped presser 7. In association with the tablet swing portion 17, a sensor 18 that detects the origin position of the motor 11 is also mounted on the bracket 12. The switching mechanism 10 is controlled as follows: the motor 11 is driven to rotate from the origin position to the end position, and stops at a position including a middle position of the swing displacement described below. This control enables switching between the combination of the action and the non-action of the looped pile 7 and the brush 6.

Fig. 3 (a) and 3 (b) and fig. 4 (a) and 4 (b) show simplified structures and operations of the knitted fabric tabletting device 2. Fig. 3 (a) shows the origin position of the motor 11, in which the looped presser 7 is in the inactive position and the brush 6 is in the active position. The output shaft of the motor 11 extends toward both the front and rear sides, and drives the presser swing 17 and the bristle swing 16 in rotation. In the tablet swing portion 17, the rotary member 17a is driven by the output of the motor 11, and the crank lever 17b is displaced. The crank rod 17b deforms a quadrangular link formed by the link 17c, the mount 17d, and the link 17 e. Since the looped presser 7 is attached to the attachment table 17d, the output of the motor 11 can perform the oscillating displacement of the looped presser 7 via the presser swing portion 17. In addition, both the pair of front and rear looped-compression pieces 7 can be made inactive, and the looped-compression pieces 7 can be made inactive. The state in which the looped sheet 7 is deactivated by the action of the brush 6 can be switched in the conventional art, for example, patent document 1.

Fig. 3 (b) shows a state in which the output shaft of the motor 11 rotates leftward from fig. 3 (a), and the bristles 6 are switched from the active position to the inactive position via the bristle oscillating portion 16. During this time, the looped sheeting 7 continues to be in an inactive state. In the bristle swinging portion 16, a drive gear 16a is driven by the output of the motor 11, and an arm 16d is swung from a driven gear 16b via a link 16 c. The connecting portion between the link 16c and the arm 16d is fitted into the long hole of the holder 6a, and the tip ends of the bristles 6 held by the holder 6a are inclined upward by the swinging displacement of the arm 16d, so that the position is switched to the inactive position. The state where both the bristles 6 and the looped presser 7 are inactive cannot be switched in patent document 1.

Fig. 4 (a) shows a state in which the output shaft of the motor 11 is rotated further to the left than in fig. 3 (b), and the looped presser 7 is switched from the inactive position to the active position via the presser swing portion 17. The bristles 6 continue to be in the inactive position as in fig. 3 (b). At the position where the looping press piece 7 acts, the pressure bar 7a enters the tooth mouth 4 to press the knitted fabric, and the old loop can be prevented from rising. In the knitted fabric presser device of patent document 1, it is impossible to switch to such a state, and if the loop-forming presser 7 as shown in fig. 4 (b) is set to the active position, the bristles 6 are also set to the active position.

Fig. 4 (b) shows a state in which the output shaft of the motor 11 is rotated further to the left than in fig. 4 (a), and the bristles 6 are switched from the inactive position to the active position via the bristle oscillating portion 16. The looped sheeting 7 continues to be in the active position. This is a state that can be switched even in the knitted fabric tabletting device of patent document 1. The knitted fabric presser device 2 of the present embodiment can be switched to the state of fig. 3 (b) and 4 (a) by changing the gear ratio of the driving gear 16a and the driven gear 16b of the bristle oscillating portion 16 to the gear ratio of the corresponding portion in the knitted fabric presser device of patent document 1. That is, by making the gear ratio of the drive based on the rotational output of the motor 11 different from that of the corresponding portion in patent document 1, the timing of swinging the looped presser 7 and the brush 6 is shifted. By shifting the timing of swinging the looped presser 7 and the bristles 6, it is possible to easily realize a combination in which the bristles 6 are continuously inactive while switching between the inactive operation of the looped presser 7 as shown in fig. 3 (b) and the active operation of the looped presser 7 as shown in fig. 4 (a). In addition, a stepping motor is used for the motor 11. The switching by the switching mechanism 10 shown in fig. 3 (a) to 4 (b) is performed at a position in the middle of the oscillating displacement due to the rotation in the same direction by controlling the number of pulses for driving the stepping motor, and the switching of the combination of the action and the non-action of the looped presser 7 and the brush 6 can be reliably performed. For convenience of explanation, in fig. 3 (a) to 4 (b), the switching mechanism 10 is sequentially switched by rotationally driving the motor 11 in the same direction, but the switching of the combination is not necessarily performed while sequentially stopping. The rotation direction of the motor 11 may be changed to the direction shown in the drawing, or may be stopped at a target position without stopping at a halfway position.

As shown in fig. 1, the knitted fabric presser device 2 of the present embodiment is configured such that the bristles 6 are not activated, and even if the latch needle 5 on the transfer side of the transfer rises relatively high toward the needle bed gap 4, the latch needle 5 does not come into contact with the needle bed gap, and the latch needle 5 does not fall. Since the latch needle 5 on the transfer side does not fall, transfer failure due to the timing of transfer between the latch needle 5 on the receiving side and the transfer is prevented, and transfer can be stabilized. In addition, since the hook 5a of the latch needle 5 on the transfer side does not catch the knitting yarn even when it is lifted up toward the mouth piece 4, it is not necessary to open the latch needle 5b with the brush 6. If the bristles 6 are retracted to the inactive position without contacting the latch needle 5, the durability of the bristles 6 is also improved.

The knitted fabric presser device 2 of the present embodiment can switch the total of 4 modes by combining the action and the non-action of the loop-forming presser 7 and the action and the non-action of the brush 6. For example, the action of the loop forming sheet 7 and the bristles 6 is used for knitting such as loop forming. When the loop forming presser 7 is used for loop transfer without the brush 6 being applied, loop transfer failure can be avoided while pressing the knitted fabric by the pressure bar 7a, and loop transfer can be performed stably. The case where the loop-forming preform 7 does not act and the bristles 6 act is used in rib knitting. The loop-forming presser 7 and the brush 6 are not used for loop transfer, and the loop-forming presser 7 is not used depending on the traveling direction of the carriage, and the brush 6 is also not used, so that loop transfer failure can be avoided. In addition, if the number of pulses driving the stepping motor is changed, the bristles 6 can be made to contact the latch 5b more deeply, enhancing the effectiveness of the bristles 6. As the driving source, any motor may be used as long as the rotational position can be detected, and other actuators such as solenoids may be used.

Claims (5)

1. A knitted fabric presser device for a flat knitting machine comprising at least one pair of needle beds arranged to face each other across a needle bed gap, each of the needle beds having a latch needle as a knitting needle,

the knitting fabric presser device of the flat knitting machine is mounted on a carriage that reciprocates in a longitudinal direction of a needle bed, switches between a position where a loop forming presser that presses a knitted fabric is applied and a position where the loop forming presser is not applied and is separated from the knitted fabric,

during switching, the bristles of the latch needle can be retracted from the acting position in a mode that the looping press piece is not contacted,

the knitted fabric sheeting device of the flat knitting machine is characterized in that,

comprises a switching mechanism which switches the position of the bristles between active and inactive with respect to the respective active and inactive positions of the looping press blade.

2. The knitted fabric sheeting apparatus of a flat knitting machine according to claim 1, characterized in that,

comprising an electric motor as a single driving source,

the switching mechanism includes:

a pressing swing part for swinging and displacing the looped pressing sheet through the rotation output of the motor; a kind of electronic device with high-pressure air-conditioning system

A bristle swinging part for swinging and displacing the bristles,

the switching between the active position and the inactive position of the looped presser and the brush is performed at a position midway in the oscillating displacement caused by the rotation of the motor.

3. The knit fabric sheeting apparatus of a flat knitting machine according to claim 1 or 2, characterized in that,

switching between the active and inactive positions includes the looped sheeting becoming inactive and the bristles becoming inactive.

4. The knit fabric sheeting apparatus of a flat knitting machine according to claim 1 or 2, characterized in that,

switching between the active and inactive positions includes the looped sheetings being active and the bristles being inactive.

5. The knitted fabric sheeting apparatus of a flat knitting machine according to claim 2, characterized in that,

the motor is a stepper motor and the motor is a stepper motor,

the switching of the combination of the action and the non-action of the bristles, as opposed to the action and the non-action of the looped sheeting, is controlled by the pulse number driving a stepper motor.