Horizontal knitting machine traction device capable of achieving vertical multi-layer traction and horizontal knitting machine

Abstract

The invention relates to an up-and-down multi-layer traction flat knitting machine traction device which comprises a plurality of traction mechanisms, and each traction mechanism comprises a fixed seat, a driving part, a pushing part which is operated by the action of the driving part to move up and down, a traction rake which is pushed by the upward movement of the pushing part, and a fixed panel which covers the outer side of the fixed seat, the traction harrows at least comprise a first group of traction harrows and a second group of traction harrows, and harrow heads of different groups of traction harrows are respectively positioned at different height positions; the first traction harrow and the second traction harrow are respectively pushed by the upwards-moving pushing piece to move upwards, move downwards along with the downward movement of the pushing piece, at least alternately move downwards from respective highest positions under the action of self weight, and are in an extending state at the beginning of downward movement, so that the harrow teeth hook and pull the braided fabric downwards; the first traction harrow and the second traction harrow repeatedly and alternately move upwards and downwards until knitting is completed. The braided fabric is pulled by multiple layers of upper and lower pulling rakes to replace a roller, so that the partial part of the braided fabric can always keep proper pulling force, and the defect that the partial part of the braided fabric retracts upwards due to loss of the pulling force is overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to a multi-layer pulling device for a flat knitting machine, and belongs to the technical field of flat knitting machines. BACKGROUND

[0002] In order to prevent the loops from floating during the knitting process, a pulling device is usually provided to pull the knitted fabric. For full-form knitting, such pulling is even more important.

[0003] Currently, full-form flat knitting machines usually use roller pulling or pulling rake plus lower roller pulling.

[0004] Roller pulling has single roller or upper and lower double roller pulling methods. Although the structure is simple, easy to manufacture, and low in cost, the use effect is not ideal, the rate of defective and waste products is high, and the effect is even worse for fine-gauge high-count yarn fabrics, and many knitting styles cannot be done.

[0005] The flat knitting machine pulling device using pulling rake (for example, the granted invention patents CN112663218 B, CN113026191 B, and CN112663219 B, etc.) can better complete the pulling action required by the full-form knitting process of the flat knitting machine, and the effect is obviously better than that of the roller device, making it widely used. However, it still has the following shortcomings: first, when the pulling rake completes a pulling stroke, the corresponding fabric will be in a state of no pulling force, at which time the fabric will easily shrink back to the cylinder direction under the action of its own elasticity, thereby affecting the knitting quality; and a basic pulling width is relatively wide, formed by the pulling widths of multiple pulling rakes, which cannot adapt to the local pulling or local non-pulling knitting requirements of the fabric.

[0006] At the same time, the existing pulling device generally also needs to be equipped with a starting plate to realize pulling of the starting knitting fabric. The starting plate is mainly composed of a thin steel plate and a row of starting needle combs uniformly arranged on the thin steel plate. During starting knitting, the row of starting needle combs as a whole performs a pulling action, which cannot meet the local pulling requirements and cannot realize the pulling requirements of local knitted fabrics with inconsistent lengths in full-form knitting, such as the same pulling effect when the sleeve and the body have inconsistent lengths. For flat knitting machines using roller pulling, especially for flat knitting machines using upper and lower double roller pulling, the starting knitting fabric needs to be knitted long enough to be below the lower roller, thereby increasing the amount of starting waste yarn and the invalid knitting time, and thus increasing the cost.

[0007] In addition, the pulling rake acts on the fabric at a position far from the cylinder port, and the initial pulling of the initial knitting requires a base needle comb device and a coordinated opening and closing device of the base needle comb device, and the cooperation of the needle comb and the machine head of the flat knitting machine and the pulling rake, which makes the manufacturing cost high, and all the base needle combs are fixed on a rigid and fixed thin steel plate, and the base needle comb cannot realize the local pulling work requirement, and the pulling force of the base needle comb needs to be strictly controlled, and a torque motor is used, and the position control is not accurate, which may cause misoperation and serious needle collision accident. SUMMARY

[0008] To solve the problems in the prior art, the application provides a pulling device for a flat knitting machine, and the specific scheme is as follows. A pulling device for a flat knitting machine, comprising a plurality of pulling mechanisms arranged on the front and rear sides of the needle plate of the flat knitting machine, wherein each pulling mechanism comprises a fixed seat, a driving member, a pushing member moving up and down under the action of the driving member, a first group of pulling rakes arranged side by side and pushed upward by the pushing member, and a fixed panel arranged on the outer side of the fixed seat and provided with rake slot holes, wherein the pulling rakes are guided by a guide structure and comprise a rake handle and a rake head provided on the upper end of the rake handle and provided with rake teeth, and at least a second group of pulling rakes are arranged side by side, the rake heads of different groups of pulling rakes are arranged at different layer heights, and the rake heads of the first group of pulling rakes are arranged at the uppermost layer, the pulling rakes in each group of pulling rakes are pushed upward by the pushing member and pushed to the highest position, the pulling rakes at the highest position are guided by the guide structure to retract to the inside of the horizontal direction of the fixed seat, the pulling rakes at the highest position move downward under the action of gravity and are guided by the guide structure to extend to the outside of the horizontal direction of the fixed seat, the rake teeth extend out of the rake slot holes of the fixed panel to hook the knitted fabric and pull the knitted fabric downward in the downward stroke, and the pulling rakes participating in the pulling action are repeatedly pushed upward by the pushing member and move downward with the pushing member until the knitting is completed.

[0009] Further design of the above technical scheme is that the different groups of pulling rakes are arranged in a set arrangement order and an interlaced number, forming an interlaced arrangement unit, and the interlaced arrangement units are arranged in series in the horizontal direction, forming a row of pulling rakes.

[0010] The pushing member is a push rod, the number of the push rods is at least the same as the number of the groups of pulling rakes, and the same group of pulling rakes in the row of pulling rakes is supported on at least one push rod, or the interlaced arrangement units of the row of pulling rakes are grouped according to the arrangement numbers to form a plurality of grouped units, the number of the grouped units is at least the same as the number of the groups of pulling rakes, and the pulling rakes corresponding to the interlaced arrangement units of each grouped unit are supported on at least one push rod.

[0011] The inter-phase arrangement unit is composed of one pulling harrow of the first group of transversely adjacent pulling harrows and one pulling harrow of the second group of pulling harrows.

[0012] The inter-phase arrangement unit comprises a first inter-phase arrangement unit and a second inter-phase arrangement unit, one pulling harrow head of the first group of transversely adjacent pulling harrows and one pulling harrow head of the second group of pulling harrows form the first inter-phase arrangement unit at the same transverse position at different heights, one pulling harrow head of the first group of transversely adjacent pulling harrows and one pulling harrow head of the second group of pulling harrows form the second inter-phase arrangement unit at two transverse positions at different heights.

[0013] The pushing rod comprises a first pushing rod and a second pushing rod; the first group of pulling harrows and the second group of pulling harrows in one row of pulling harrows arranged according to the first inter-phase arrangement unit are respectively supported on the first pushing rod and the second pushing rod, or the pulling harrows corresponding to the first inter-phase arrangement units of the odd-numbered groups and the even-numbered groups are respectively supported on the first pushing rod and the second pushing rod; the first group of pulling harrows and the second group of pulling harrows in one row of pulling harrows arranged according to the second inter-phase arrangement unit are respectively supported on the first pushing rod and the second pushing rod, or the pulling harrows corresponding to the second inter-phase arrangement units of the odd-numbered groups and the even-numbered groups are respectively supported on the first pushing rod and the second pushing rod.

[0014] The first pushing rod and the second pushing rod each comprise a horizontal rod with a plate-shaped body and a vertical rod, the horizontal rod is vertically connected to the upper end of the vertical rod, and the upper end of the horizontal rod is provided with a plurality of transversely arranged rectangular teeth for supporting the lower end of the handle of the pulling harrow.

[0015] The first pushing rod and the second pushing rod are slidably arranged in the inner cavity of the fixed seat with part of the opposite surfaces abutting against each other.

[0016] The driving member is a nut moving up and down along a screw rod, and the screw rod is arranged on the rotating shaft of the motor.

[0017] The nut comprises two first nuts, when the two first nuts move upwards, they respectively push against the first pushing rod and the second pushing rod, so that the first pushing rod and the second pushing rod move upwards.

[0018] The pulling device of the multi-layer transverse weaving machine further comprises a first switching swing rod and a third switching swing rod, and the nut comprises one first nut; when the first nut moves upwards and downwards, it respectively drives the swinging of the first switching swing rod and the third switching swing rod, the swinging first switching swing rod and the third switching swing rod respectively push the first pushing rod and the second pushing rod to move upwards, so that the first pushing rod and the second pushing rod move upwards alternately. The first nut is provided with a first driving block on each lateral side, the top end and bottom end of the first driving block form a first driving surface and a fourth driving surface respectively, and the side surface of the driving block perpendicular to the top end forms an abutting surface; the first switching swing rod and the third switching swing rod are placed on one side of the inner side of the push rod in the fixed seat, the first switching swing rod includes a first long arm rod and a first short arm rod coaxially rotating, and the third switching swing rod includes a driving gear short rod and a driven gear long rod meshing with each other; the vertical rod of the first push rod and the second push rod is provided with a sliding groove; the first short arm rod and the driving gear short rod can touch the first driving surface and the fourth driving surface of the first nut respectively, and the first long arm rod and the driven gear long rod are slidingly connected with the sliding grooves on the vertical rods of the first push rod and the second push rod; the first short arm rod is pushed upward by the first driving surface, the driving gear short rod is rotated and the driven gear long rod meshing with each other is swung upward, and the first switching swing rod and the driven gear long rod swing upward respectively and alternately push the first push rod and the second push rod upward.

[0019] The guide structure includes a shaft pin and a guide groove in relative motion, the shaft pin is arranged on the fixed seat, the fixed seat further includes a fixed plate, the inner cavity of the fixed seat is provided with a plurality of rake grooves arranged laterally side by side and used for inserting and connecting the rake handle of the pulling rake, the shaft pin includes an upper shaft pin and a lower shaft pin arranged in parallel upward and downward and penetrating through all the rake grooves, the lower part of the rake groove is provided with two lateral guide grooves for guiding the upward and downward movement of the first push rod and the second push rod respectively, the fixed plate is fixed on one side outside the guide groove, the first push rod and the second push rod are placed on the inner side of the fixed plate and can slide upward and downward, and the motor is arranged in the inner cavity of the fixed seat below the fixed plate and the nut rotated by the screw rod on the rotating shaft of the motor is in a position suitable for driving the corresponding push rod.

[0020] The pulling rake includes at least a first pulling rake and a second pulling rake, the rake handle of the first pulling rake is longer than that of the second pulling rake, and the first group of pulling rakes and the second group of pulling rakes are respectively composed of the first pulling rake and the second pulling rake.

[0021] The rake handles of the first pulling rake and the second pulling rake in the second interphase arrangement unit are of the same width and are adapted to the width of the rake groove on the fixed seat, and the symmetric center lines of the rake head and the rake handle coincide, and the width of the rake handle is not wider than the width of the rake head.

[0022] The rake handles of the first pulling rake and the second pulling rake in the first interphase arrangement unit are symmetrically arranged in one rake groove by being deviated to the left and right sides of the rake head respectively, and the widths of the rake handles of the first pulling rake and the second pulling rake are smaller than the width of the rake groove and not greater than the width of the rake head.

[0023] The upper and lower multi-layer pulling transverse knitting machine pulling device further comprises a plurality of tension springs and a tension spring adjusting plate or a swing member, the tension spring adjusting plate is adjustably arranged on the outside of the fixed plate or is hingedly connected to the inner cavity of the fixed seat at one end of the swing member, and each pulling rake is connected to the tension spring adjusting plate or the swing end of the swing member through a tension spring.

[0024] The upper and lower multi-layer pulling transverse knitting machine pulling device further comprises a group of pulling needle combs which are arranged in parallel and are pushed upward by the pushing member, and the fixed panel is further provided with needle comb slots, the pulling needle comb is guided by a guide structure composed of a relative motion shaft pin and a guide slot and comprises a needle comb rod and a pulling hook arranged at the upper end of the needle comb rod, and the pulling needle comb is at least arranged at a position between two adjacent interval arrangement units; during the starting knitting, the pulling needle comb is pushed upward by the upward movement of the pushing member, the pulling hook is extended out of the needle comb slot of the fixed panel to the highest position of the pulling needle comb which is higher than the highest position of the pulling rake and close to the cylinder mouth, and is guided by the guide structure to be in a retracting state of retracting to the inside of the transverse direction of the fixed panel, the pulling needle comb at the highest position is followed by the downward movement of the pushing member and is followed by the downward movement under the action of at least its own gravity, and is guided by the guide structure to be in an extending state of extending to the outside of the transverse direction of the fixed seat at the beginning of the downward movement, the pulling hook is extended out of the rake slot of the fixed panel to hook the knitted fabric and pull the knitted fabric downward in the downward movement stroke, and the pulling needle comb is guided by the guide structure to be in a retracting state of retracting to the inside of the transverse direction of the fixed panel at the end of the downward movement stroke to release the pulling of the starting knitted fabric, and the pulling needle comb is no longer pushed upward by the upward movement of the pushing member.

[0025] The pushing rod further comprises a third pushing rod, and a group of pulling needle combs are supported on the third pushing rod, the third pushing rod has a plate-shaped body, and a guide sliding block is arranged at the lower end of the plate-shaped body relative to the inner side of the fixed seat.

[0026] The nut comprises two first nuts and one third nut, the one third nut is used to drive the upward movement of the third pushing rod, and the two first nuts are used to respectively drive the upward movement of the first pushing rod and the second pushing rod.

[0027] The upper and lower multi-layer pulling transverse knitting machine pulling device further comprises two first switching swing rods and at least one second switching swing rod, the nut comprises two second nuts, the two second nuts are used to respectively drive the upward swinging of a corresponding one of the first switching swing rods, the two first switching swing rods which are swung upward respectively push the first pushing rod and the second pushing rod to move upward, and at least one of the two second nuts is further used to drive the upward swinging of the second switching swing rod, and the second switching swing rod which is swung upward pushes the third pushing rod to move upward. The first switching swing lever comprises a first long arm lever and a first short arm lever rotating on the same axis, and the second switching swing lever comprises a second long arm lever and a second short arm lever rotating on the same axis, the second long arm lever being longer than the first long arm lever; the second nut is provided with a first driving block and a second driving block on the two sides in the transverse direction, the top end surfaces of the first driving block and the second driving block form a first driving surface and a second driving surface respectively, the first driving surface is higher than the second driving surface, and the vertical side surface below the top end surface of the first driving block forms an abutting surface; the vertical rods of the first push rod and the second push rod are provided with sliding grooves, and the third push rod is provided with a triggering end below; the two first short arm levers are respectively in contact with the first driving surfaces of the corresponding second nuts, and the two first long arm levers are in sliding connection with the sliding grooves on the vertical rods of the first push rod and the second push rod; the second short arm lever is in contact with the second driving surface of the third nut, and the second long arm lever is in contact with the triggering end of the third push rod; the two first driving surfaces are alternately moved upward to respectively push the corresponding first short arm lever to make the corresponding first switching swing lever swing upward and make the end of the first short arm lever move relative to the first driving surface, the first switching swing lever swinging upward pushes the first push rod or the second push rod to move upward through the sliding connection of the first long arm lever and the first push rod or the second push rod, and when the end of the first short arm lever slides out of the first driving surface, the first short arm lever is separated from the pushing of the second nut, and when the second driving surface continues to move upward, the first short arm lever is opposite to the abutting surface, the first push rod or the second push rod remains at the position when the first push rod or the second push rod is separated from the pushing of the second nut, until the abutting surface moves out and is no longer opposite to the end of the first short arm lever.

[0028] The up-and-down multi-layer pulling transverse knitting machine pulling device further comprises a first switching swing lever and a third switching swing lever, the nut comprises a fourth nut, the fourth nut is used to drive the swing of the first switching swing lever and the upward movement of the third push rod, and drive the swing of the third switching swing lever, the swinging first switching swing lever and the third switching swing lever respectively and alternately push the first push rod and the second push rod to move upward in sequence; The first and third switching swing rods are arranged on one side of the inner side of the fixed plate and correspond to the vertical rods of the first and second push rods respectively, the first switching swing rod comprises a first long arm rod and a first short arm rod rotating on the same axis, and the third switching swing rod comprises a driving gear short rod and a driven gear long rod in meshing engagement; two first driving blocks and a third driving block are arranged on the two sides of the transverse direction of the four nuts and opposite the outer side of the fixed plate, the top end surface and the bottom end surface of the two first driving blocks form a first driving surface and a fourth driving surface respectively, and the top end surface of the third driving block forms a third driving surface; the first driving surface is higher than the third driving surface, and the vertical side surface below the top end surface of the first driving block forms an abutting surface; the vertical rods of the first and second push rods are each provided with a sliding groove, and the third push rod is provided below the third driving surface and is pushed by the third driving surface; the first short arm rod and the driving gear short rod can touch the first driving surface and the fourth driving surface of the first nut respectively, and the first long arm rod and the driven gear long rod are in sliding connection with the sliding grooves on the vertical rods of the first and second push rods respectively; the first short arm rod is pushed by the first driving surface moving upward to make the first switching swing rod swing upward, the first short arm rod is separated from the pushing of the fourth nut when the end of the first short arm rod slides out of the first driving surface, and the first short arm rod is in abutment with the abutting surface when the first driving surface continues to move upward, the first push rod remains in the position when the first short arm rod is separated from the pushing of the fourth nut until the abutting surface moves out and is no longer in abutment with the end of the first short arm rod; the fourth driving surface pushes the driving gear short rod to rotate and makes the driven gear long rod in meshing engagement swing upward, the first switching swing rod and the driven gear long rod swing upward to push the first and second push rods to move upward respectively, and the third driving surface moves upward to push the third push rod to move upward through the third driven surface.

[0029] The shaft pin in the guide structure is arranged on the fixed seat, the fixed seat further comprises a fixed plate, the inner cavity of the fixed seat is provided with a plurality of rake grooves and a plurality of needle comb grooves arranged in parallel in the transverse direction and used for inserting and connecting the rake handles and the needle comb rods of the pulling rake and the pulling needle comb, and the rake grooves and the needle comb grooves are arranged in transverse spacing corresponding to the pulling rake and the pulling needle comb, the shaft pin comprises an upper shaft pin and a lower shaft pin arranged in parallel in the up-down direction and penetrating through all the rake grooves and the needle comb grooves, the lower side of the rake grooves and the needle comb grooves is provided with two transversely parallel guide grooves for guiding the up-down movement of the first and second push rods respectively, the fixed plate is fixed on one side of the outer side of the guide grooves, the first and second push rods are arranged on the inner side of the fixed plate and can slide up and down, and the third push rod is arranged on the outer side of the fixed plate and can slide up and down, the motor is arranged in the inner cavity of the fixed seat below the fixed plate, and the nut rotated by the screw rod on the rotating shaft of the motor is in a matched position with the corresponding push rod driven by the motor.

[0030] The pulling rake comprises at least a first pulling rake and a second pulling rake, the rake handle of the first pulling rake is longer than the rake handle of the second pulling rake, and the first and second groups of pulling rakes are respectively composed of the first and second pulling rakes.

[0031] The rake handle width of the first pulling rake and the second pulling rake in the second pulling rake combination is the same and is adapted to the rake slot width on the fixed seat, and the symmetric center line of the rake head and the rake handle coincides, and the rake handle width is not wider than the rake head width.

[0032] The first pulling rake and the second pulling rake in the pulling rake combination are symmetrically arranged in a rake slot by respectively deviating to the left and right sides of the rake head transversely, and the rake handle width of the first pulling rake and the second pulling rake is smaller than the rake slot width and not larger than the rake head width.

[0033] The pulling device of the upper and lower multi-layer pulling flat knitting machine further comprises a plurality of tension springs and tension spring adjusting plates or swing members, the tension spring adjusting plates are adjustably arranged on the outside of the fixed plate or are hingedly connected to the inner cavity of the fixed seat at one end of the swing member, each pulling rake is connected to the tension spring adjusting plate or the swing end of the swing member through a tension spring, and each pulling needle comb is connected to the fixed plate through a tension spring, and the pulling rake and the pulling needle comb form downward pulling force through the weight and the tension of the tension spring to pull the knitted fabric.

[0034] The pulling device of the upper and lower multi-layer pulling flat knitting machine further comprises a third group of pulling rakes, the rake head of the second group of pulling rakes and the rake head of the third group of pulling rakes are arranged below the rake head of the first group of pulling rakes from top to bottom, and the interlaced arrangement unit is composed of at least one pulling rake in the first group of pulling rakes, one pulling rake in the second group of pulling rakes and one pulling rake in the third group of pulling rakes arranged transversely in sequence.

[0035] The pushing member is a push rod, and the push rod comprises a first push rod, a second push rod and a fourth push rod.

[0036] The first group of pulling rakes, the second group of pulling rakes and the third group of pulling rakes are transversely arranged in a loop according to the interlaced arrangement unit to form a row of pulling rakes, and the pulling rakes in the first group of pulling rakes, the second group of pulling rakes and the third group of pulling rakes are respectively supported on the first push rod, the second push rod and the fourth push rod.

[0037] The first push rod, the second push rod and the fourth push rod each comprise a horizontal rod and a vertical rod with a plate-shaped body, the horizontal rod is vertically connected to the upper end of the vertical rod, and the upper end of the horizontal rod is provided with a plurality of rectangular teeth arranged transversely in parallel for supporting the lower end of the rake handle of the pulling rake.

[0038] The first push rod, the second push rod and the fourth push rod are slidably arranged in the inner cavity of the fixed seat by abutting against each other in sequence on the opposite surfaces of the first push rod and the second push rod and the second push rod and the fourth push rod.

[0039] The driving member is a nut moving up and down along a screw rod, and the screw rod is arranged on the rotating shaft of the motor.

[0040] The nut comprises three first nuts for driving the first push rod, the second push rod and the fourth push rod to move upward respectively.

[0041] The shaft pin in the guide structure is arranged on the fixed seat, the fixed seat further comprises a fixed plate, the inner cavity of the fixed seat is provided with a plurality of rake grooves arranged transversely and in parallel and used for inserting and connecting the rake handles of the pulling rakes, the shaft pin comprises an upper shaft pin and a lower shaft pin arranged transversely and in parallel through all the rake grooves, a lower portion of each rake groove is provided with three transversely and in parallel arranged guide grooves for guiding the upward and downward movements of the first push rod, the second push rod and the fourth push rod respectively, the fixed plate is fixed on one side outside the guide grooves, the first push rod, the second push rod and the fourth push rod are arranged on the inner side of the fixed plate and can slide upward and downward, and the motor is arranged below the inner cavity of the fixed seat and the nut on the rotating shaft of the motor is arranged at a position suitable for pushing the corresponding push rod.

[0042] The pulling rakes comprise a first pulling rake, a second pulling rake and a third pulling rake, the rake handle of the first pulling rake is longer than that of the second pulling rake, the rake handle of the second pulling rake is longer than that of the third pulling rake, and the first group of pulling rakes, the second group of pulling rakes and the third group of pulling rakes are respectively composed of the first pulling rake, the second pulling rake and the third pulling rake.

[0043] The phase arrangement unit is composed of one pulling rake in the first group of pulling rakes, one pulling rake in the second group of pulling rakes and one pulling rake in the third group of pulling rakes which are arranged transversely and adjacently, the rake handles of the first pulling rake, the second pulling rake and the third pulling rake in the phase arrangement unit have the same width and are adapted to the width of the rake grooves on the fixed seat, the center lines of the rake heads and the rake handles coincide, and the width of the rake handle is not wider than the width of the rake head.

[0044] The pulling device of the flat knitting machine with multiple layers of pulling up and down further comprises a plurality of tension springs and a tension spring adjusting plate or a swing member, the tension spring adjusting plate is arranged on the outer side of the fixed plate and can be adjusted up and down or the swing member is hinged to the inner cavity of the fixed seat at one end, each pulling rake is connected to the swing end of the tension spring adjusting plate or the swing member through a tension spring, and the pulling rake is pulled downward by the downward pulling force formed by the weight and the tension force of the tension spring to pull the knitted fabric.

[0045] The upper and lower multi-layer pulling transverse knitting machine pulling device further comprises a group of pulling needle combs which are pushed up and arranged in parallel laterally, the fixed panel is further provided with needle comb slots, the pulling needle comb is guided by a guide structure composed of a relative movement shaft pin and a guide slot and comprises a needle comb rod and a pulling hook arranged at the upper end of the needle comb rod, and the pulling needle comb is at least arranged at a position between two adjacent and alternating arrangement units; during the starting bottom knitting, the pulling needle comb is pushed up by the upward movement of the pusher, the pulling hook is extended from the needle comb slot of the fixed panel to the highest position of the pulling rake which is higher than the highest position of the pulling rake and close to the cylinder mouth, and is guided by the guide structure to be in a retracting state which is retracted to the inside of the lateral direction of the fixed panel, the pulling needle comb at the highest position is followed by the downward movement of the pusher and is followed by the downward movement at least under the action of its own gravity, and is guided by the guide structure to be in an extending state which is extended to the outside of the lateral direction of the fixed base at the beginning of the downward movement, the pulling hook is extended from the rake slot of the fixed panel to hook the knitted fabric and pull the knitted fabric downward in the downward movement stroke, and the pulling needle comb is guided by the guide structure to be in a retracting state which is retracted to the inside of the lateral direction of the fixed panel at the end of the downward movement stroke to release the pulling of the starting bottom knitted fabric, and the pulling needle comb is no longer pushed up by the upward movement of the pusher.

[0046] The push rod further comprises a third push rod, a group of pulling needle combs are supported on the third push rod, and the third push rod has a plate-shaped body, and the lower end of the plate-shaped body is provided with a guide sliding block relative to the inside of the fixed base.

[0047] The upper and lower multi-layer pulling transverse knitting machine pulling device further comprises two first switching swing rods and at least one second switching swing rod, the nut comprises a first nut and two second nuts, the two second nuts are used to respectively drive a corresponding one of the first switching swing rods to swing upward, the two first switching swing rods which swing upward respectively push the first push rod and the second push rod to move upward, at least one of the two second nuts is also used to drive the second switching swing rod to swing upward, the second switching swing rod which swings upward pushes the third push rod to move upward, and a first nut is used to push the fourth push rod to move upward.

[0048] The shaft pin in the guide structure is arranged on the fixed base, the fixed base further comprises a fixed plate, the inner cavity of the fixed base is provided with a plurality of rake slots and a plurality of needle comb slots which are arranged in parallel laterally and used for inserting the rake handle of the pulling rake and the needle comb rod of the pulling needle comb, and the rake slots and the needle comb slots are arranged in the lateral direction alternately matched with the pulling rake and the pulling needle comb, the shaft pin comprises an upper shaft pin and a lower shaft pin which are arranged in parallel up and down and pass through all the rake slots and the needle comb slots, the lower part of the rake slot and the needle comb slot is provided with three lateral guide slots which guide the upward and downward movement of the first push rod, the second push rod and the fourth push rod respectively, the fixed plate is fixed on the outside of the guide slot, the first push rod, the second push rod and the fourth push rod are arranged on the inside of the fixed plate and can slide up and down, the third push rod is arranged on the outside of the fixed plate and can slide up and down, and the motor is arranged in the inner cavity of the fixed base below the fixed plate, and the nut which is rotated by the screw rod on the rotating shaft of the motor is matched with the corresponding push rod which is driven.

[0049] The pulling rakes include a first pulling rake, a second pulling rake, and a third pulling rake, the rake handle of the first pulling rake is longer than the rake handle of the second pulling rake, the rake handle of the second pulling rake is longer than the rake handle of the third pulling rake, and the first group of pulling rakes, the second group of pulling rakes, and the third group of pulling rakes are respectively composed of the first pulling rake, the second pulling rake, and the third pulling rake.

[0050] The interphase arrangement unit is composed of one pulling rake in the first group of pulling rakes, one pulling rake in the second group of pulling rakes, and one pulling rake in the third group of pulling rakes, the rake handle widths of the first pulling rake, the second pulling rake, and the third pulling rake in the interphase arrangement unit are the same and are adapted to the width of the rake slot on the fixed seat, the center lines of the rake head and the rake handle are coincident, and the rake handle width is not wider than the rake head width.

[0051] The pulling device of the upper and lower multi-layer pulling flat knitting machine further includes a plurality of tension springs and a tension spring adjusting plate or a swing member, the tension spring adjusting plate is adjustably arranged on the outside of the fixed plate or is hingedly connected to the inner cavity of the fixed seat at one end of the swing member, each pulling rake is connected to the swing end of the tension spring adjusting plate or the swing member through a tension spring, and each pulling needle comb is connected to the fixed plate through a tension spring, the pulling rakes and the pulling needle combs form downward pulling force through their own weight and the pulling force of the tension springs to pull the knitted fabric.

[0052] The pulling device of the upper and lower multi-layer pulling flat knitting machine further includes a push rod position adjusting unit, the push rod position adjusting unit is arranged on the lateral sides below the fixed seat and includes an adjusting rod for receiving the downward displacement of the push rod, a nut seat arranged at one end of the adjusting rod, and an adjusting screw rod screwed to the nut seat, the lateral sides below the fixed seat are symmetrically provided with placing grooves for placing the adjusting rods, one lateral side below the placing grooves is provided with a nut seat sliding groove in communication with the placing grooves, the lower side of the nut seat sliding groove is provided with a screw rod groove in communication with the nut seat sliding groove, the nut seat is slidably arranged in the nut seat sliding groove, the adjusting screw rod is rotatably and non-movably arranged in the screw rod groove, and rotation of the adjusting screw rod causes the adjusting rod to move up and down, so that the displacement position of the push rod when moving downward is adjusted along with the up-and-down movement of the adjusting rod.

[0053] A flat knitting machine adopting the pulling device of the upper and lower multi-layer pulling flat knitting machine.

[0054] The above-mentioned application has the following beneficial effects: The present application sets at least one group of pulling rakes under a group of pulling rakes, and each group of pulling rakes is at different height position, so as to replace the action of rollers by at least one group of pulling rakes at lower position, to overcome the defects of fabric stability and fabric surface effect caused by fabric shrinkage due to pulling by pulling rakes, so as to save a pair of double rollers and power transmission device, and also save roller opening and closing device, to reduce the complexity of flat knitting machine, make the structure more simple, facilitate installation and maintenance, and reduce the cost.

[0055] The group of pulling rakes at upper position is also arranged alternately with each group of pulling rakes at lower position, so as to be driven alternately by driving member, so that the pulling width is separated very small, and can adapt to the local pulling requirement of knitting.

[0056] The present application sets pulling needle comb, and the highest pulling position can be close to the lower position of cylinder, so as to adapt to the pulling of starting knitting, so that in starting knitting, only a few rows of knitting (commonly known as waste yarn) are needed, and the pulling needle comb can hook the waste yarn, and then the pulling rakes replace the pulling of the knitting fabric, so as to greatly reduce the length of the waste yarn knitting to the position of the pulling rakes, save the amount of waste yarn and the time of waste yarn knitting, and completely avoid the needle collision and machine stop accident caused by the accidental action of the starting needle comb when the starting needle comb is stretched out of the cylinder to complete the hooking action after the first row of starting knitting is completed, and the complicated starting needle comb device and the opening and closing device of the pulling rakes are saved, so that the complicated pulling system is greatly simplified, and the manufacturing cost is greatly saved. The pulling needle comb and the pulling rakes in the present application can share one driving member to drive through the setting of switching lever in the present application, so as to save the number of motors, and save the manufacturing cost of the whole machine.

[0057] The present application also sets push rod position adjusting unit, to adjust the stroke of the push rod, so as to prevent the problem of large eye caused by too large stroke or insufficient pulling force caused by too small stroke. BRIEF DESCRIPTION OF DRAWINGS

[0058] Figure 1 The position structure diagram of the pulling mechanism of the first embodiment of the present application is set below the needle plate of the flat knitting machine; Figure 2 The structure diagram of the pulling mechanism of the first embodiment is shown, wherein: a is the front view (part of the fixed panel is omitted), and b is the side view; Figure 3 The structure diagram of the pulling rakes is shown, wherein: a is the second pulling rake, and b is the first pulling rake; Figure 4 The position diagram of the pulling rakes, push rod and driving member in the fixed seat of the pulling mechanism of the first embodiment is shown (the fixed panel is omitted). Figure 5 For Figure 4 The driving member transmission structure diagram of the pulling rake in the pulling mechanism shown in the figure; Figure 6 For the push rod perspective diagram, wherein: a diagram is the first push rod, b is the second push rod; Figure 7 For the structure diagram of the pulling mechanism of example two; Figure 8 For the position diagram of the pulling rake, the push rod in the fixed seat in the pulling mechanism of example two; Figure 9 For the position diagram of the pulling rake, the push rod and the driving member in the pulling mechanism of example two (omit the fixed panel); Figure 10 For Figure 8 The first nut diagram in the pulling mechanism shown in the figure; Figure 11 For Figure 8 The first switching swing rod diagram in the pulling mechanism shown in the figure; wherein: a diagram is a three-dimensional diagram; b is a plane view; Figure 12 For Figure 8 The third switching swing rod diagram in the pulling mechanism shown in the figure; Figure 13 For the position structure diagram of the pulling mechanism of example three is arranged below the needle plate of the flat knitting machine; Figure 14 For Figure 13 The local enlarged view of C in the position structure diagram shown in the figure; Figure 15 For the structure diagram of the pulling mechanism of example three, wherein: a diagram is a front view (omit the fixed panel), b is a side view; Figure 16 For the pulling needle comb perspective structure diagram; Figure 17 For the position diagram of the fixed plate and the push rod and the switching swing rod in the pulling mechanism of example three; Figure 18 For the pulling rake, the pulling needle comb is driven by the push rod and the driving member transmission structure diagram in the pulling mechanism of example three; Figure 19 For the fixed plate structure diagram in the pulling mechanism of example three; Figure 20 For the swing member structure diagram in the pulling mechanism of example three; Figure 21 For the third push rod diagram in the pulling mechanism of example three; Figure 22Figure 1 is a schematic diagram of the fixed seat structure in the pulling mechanism of Example 3, wherein: Figure a is a front view of the fixed seat, and Figure b is a side view of the fixed seat; Figure 23 Figure 2 is a schematic diagram of the position of the adjusting rod and the push rod in the pulling mechanism of Example 3 (the fixed panel is omitted); Figure 24 Figure 3 is a schematic diagram of the position of the first pulling rake and the second pulling rake in the pulling mechanism of Example 3, wherein: Figure a shows that the first pulling rake is in the highest position and the second pulling rake is in the lowest position, and Figure b shows that the first pulling rake is in the lowest position and the second pulling rake is in the highest position; Figure 25 Figure 4 is a schematic diagram of the position of the pulling needle comb in the pulling mechanism of Example 3, wherein: Figure a shows that the pulling needle comb is in the highest position, Figure b shows that the pulling needle comb is in the extended state, and Figure c shows that the pulling needle comb is in the lowest position; Figure 26 Figure 5 is a schematic diagram of the fixed panel in the pulling mechanism of Example 3; Figure 27 Figure 6 is a schematic diagram of the second nut in the pulling mechanism of Example 3, wherein: Figure a is a right view, Figure b is a front view, and Figure c is a left view; Figure 28 Figure 7 is a schematic diagram of the second switching swing rod in the pulling mechanism of Example 3, wherein: Figure a is a three-dimensional view, and Figure b is a plan view; Figure 29 Figure 8 is a schematic diagram of the position of the pulling rake and the pulling needle comb when the bottom knitting of the pulling mechanism of Example 3 is started, wherein: Figure a shows that the pulling rake and the pulling needle comb are both in the highest position, and Figure b shows that the pulling needle comb is in the lowest position and the pulling rake is in the highest position; Figure 30 Figure 9 is a schematic diagram of the abutting state of the end surface of the first switching swing rod and the abutting surface of the second nut in the pulling mechanism of Example 3; Figure 31 Figure 10 is a schematic diagram of the pulling rake, the pulling needle comb, the push rod and the driving member transmission structure in the pulling mechanism of Example 4; Figure 32 Figure 11 is a schematic diagram of the pulling rake, the pulling needle comb, the push rod and the driving member transmission structure in the pulling mechanism of Example 5 (the fixed panel is omitted); Figure 33 Figure 12 is a schematic diagram of the third push rod in the pulling mechanism of Example 5; Figure 34 Figure 13 is a schematic diagram of the third nut in the pulling mechanism of Example 5; Figure 35 Figure 14 is a schematic diagram of the fixed panel structure in the pulling mechanism of Example 5; Figure 36 Figure 15 is a schematic diagram of the pulling rake, the pulling needle comb, the push rod and the driving member transmission structure in the pulling mechanism of Example 6; Figure 37 Figure 7 is a schematic diagram of the drive member transmission structure in the drawing mechanism of Example Seven; Figure 38 Figure 8 is a schematic diagram of the fourth nut in the drawing mechanism of Example Seven; wherein a is a right side view, b is a front view, and c is a left side view; Figure 39 Figure 9 is a structural side view of the drawing mechanism of Example Seven; Figure 40 Figure 10 is a schematic diagram of the drawing mechanism of Example Eight; Figure 41 Figure 11 is a schematic diagram of the drawing rake, drawing pin comb, push rod, and drive member transmission structure in the drawing mechanism of Example Eight; Figure 42 Figure 12 is a schematic diagram of the drawing mechanism of Example Nine; Figure 43 Figure 13 is a schematic diagram of the drawing rake, drawing pin comb, push rod, and drive member transmission structure in the drawing mechanism of Example Nine; Figure 44 Figure 14 is a schematic diagram of the position of the drawing rake, push rod, and drive member in the drawing mechanism of Example Ten; Figure: A-needle plate, A1-cylinder port, B-pulling mechanism, 1-pulling rake, 11-first pulling rake, 12-second pulling rake, 101-rake tooth, 102-rake handle, 103-rake head, 2-pulling needle comb, 21-pulling hook, 22-needle comb rod, 31-first push rod, 32-second push rod, 301-horizontal rod, 3011-rectangular tooth, 302-vertical rod, 3021-groove, 3022-sliding slot, 3024-sliding surface, 3025-driven surface, 33-third push rod, 331-guiding sliding block, 332-actuating end 41-first guide slot, 411-first oblique straight slot, 412-first straight slot, 42-second guide slot, 421-second oblique straight slot, 422-second straight slot, 43-long shaft pin, 51-first nut, 52-second nut, 53-third nut, 54-fourth nut, 501-first driving block, 5011-first driving surface, 5012-abutting surface, 5013-fourth driving surface, 502-second driving block, 5021-second driving surface, 503-third driving block, 5031-third driving surface, 55-motor, 56-screw rod, 61-first switching swing rod, 611-first driven part, 612-first driving end, 613-end surface, 62-second switching swing rod, 621-second driven part, 622-second driving end, 63-third switching swing rod, 631-driving gear short rod, 6311-third driven part, 632-driven gear long rod, 6321-third driving end, 71-swinging part, 72-tension spring, 701-tension spring hole, 73-tension spring adjusting plate, 8-fixing plate, 81-clearance slot hole, 82-guiding sliding slot, 91-fixing seat, 911-rake slot, 912-needle comb slot, 913-push rod slot, 914-nut slot, 915-shaft pin hole, 916-switching swing rod hinging slot, 917-swinging part hinging slot, 918-motor slot, 919-space, 92-fixing panel, 921-rake slot hole, 922-needle comb slot hole, 90-adjusting unit, 901-adjusting rod, 902-nut seat, 903-adjusting screw rod. DETAILED DESCRIPTION

[0059] The application will be described in detail below with reference to the drawings and specific embodiments.

[0060] The following orientation words: 1) "inner" and "outer" are defined according to the inner cavity of the fixing seat; 2) the transverse direction is consistent with the transverse direction of the flat knitting machine; 3) front and back are consistent with the front and back of the front and back needle bed of the flat knitting machine. Embodiment one

[0061] The flat knitting machine pulling device of the embodiment, as shown in the figure, comprises a plurality of pulling mechanisms B arranged on the front and back sides of the flat knitting machine needle plate A respectively. Figure 1 The pulling mechanisms B are arranged on the front and back sides of the needle plate A respectively, and the pulling mechanisms B are arranged on the front and back sides of the needle plate A respectively. Figures 2-3As shown, the pulling mechanism B includes a fixed seat 91, a fixed panel 92 covering the outer side of the fixed seat 91, a pulling rake rotatably and slidably arranged in the fixed seat 91 through a guide structure, a driving member arranged in the fixed seat 91 and moving up and down, and a pushing member arranged in the fixed seat 91 and moving up and down under the action of the driving member. The pulling rake includes a first group of pulling rakes formed by a plurality of first pulling rakes 11 and a second group of pulling rakes formed by a plurality of second pulling rakes 12. The first pulling rake 11 and the second pulling rake 12 both have a rake handle 102 and a rake head 103 arranged at the upper end of the rake handle 102. The rake head 103 is provided with a rotatable rake tooth 101 disclosed in the prior art (for details, see the published patent 202011120222.9 A pulling rake for a pulling device of a flat knitting machine). The rake handle width is not wider than the rake head, and the symmetry center lines of the rake head and the rake handle coincide. However, the rake handle length of the first pulling rake 11 is longer than that of the second pulling rake 12. The two groups of pulling rakes are arranged in corresponding rake grooves in the fixed seat through the rake handles, and the rake handle width is matched with the rake groove width, and are rotatably and slidably arranged in the fixed seat 91 through the guide structure (for details, see Example Three). In this embodiment, the rake heads of the two groups of rakes are arranged at different height positions by setting different rake handle lengths, forming two layers of rake heads, and the rake heads of the second group of pulling rakes are always below the first group of pulling rakes.

[0062] The two groups of pulling rakes are arranged alternately to form an alternating arrangement unit containing the first group of pulling rakes and the second group of pulling rakes. In this embodiment, one first pulling rake in the first group of pulling rakes and one second pulling rake in the second group of pulling rakes are arranged alternately, and the rake heads of the first pulling rake and the second pulling rake are arranged at two transverse positions at different heights to form a further defined second alternating arrangement unit. According to the present application, the alternating arrangement unit can also have other forms, for example, the alternating sequence is a first pulling rake and a second pulling rake, and the alternating number is two first pulling rakes and one second pulling rake.

[0063] The guiding structure of the present application is composed of the shaft pin and the guiding slot with relative movement. In the embodiment, the shaft pin 43 is arranged on the fixed seat 91, and the shaft pin 43 includes the upper shaft pin and the lower shaft pin which are arranged in parallel from top to bottom and pass through all the rake slots. The guiding slot is the first guiding slot 41 arranged on the rake handle 12, and the first guiding slot 41 includes the first inclined straight slot 411 and the first straight slot 412 arranged from top to bottom. The first inclined straight slot 411 is composed of the straight slot segment and the lower inclined slot segment which is inclined downward and outward of the fixed seat and connected to the lower end of the straight slot segment. The fixed panel 92 which covers the outside of the fixed seat 91 is provided with a plurality of rake slot holes for exposing the rake teeth 11 on the pulling rake. When the upper shaft pin moves from the lower inclined slot segment to the straight slot segment, the pulling rake rotates inward around the lower shaft pin, and presents the retracting state, i.e. the non-pulling state, which retracts inward in the transverse direction of the fixed panel 92. When the upper shaft pin moves from the straight slot segment to the lower inclined slot segment, the pulling rake rotates outward around the lower shaft pin, and presents the extending state which extends outward in the transverse direction of the fixed panel 92.

[0064] In the embodiment, the pushing member is the push rod. As shown in Figure 4 and Figure 5 , the push rod includes the first push rod 31 and the second push rod 32. The first pulling rake 11 and the second pulling rake 12 in the row of pulling rakes which are arranged in the second interlaced arrangement unit in series in the transverse direction are respectively supported on the first push rod 31 and the second push rod 32, that is, the first group of pulling rakes and the second group of pulling rakes are respectively supported on the first push rod 31 and the second push rod 32. As shown in Figure 6 , the first push rod 31 and the second push rod 32 each include the horizontal rod and the vertical rod with the plate-shaped body. The horizontal rod 301 is vertically connected to the upper end of the vertical rod 302. The horizontal rod 301 is provided with a plurality of rectangular teeth 3011 which are arranged in parallel in the transverse direction and used for supporting the lower end of the rake handle of the pulling rake. The first push rod 31 and the second push rod 32 are arranged in the fixed seat in sliding mode with the partial opposite surfaces abutting against each other.

[0065] The driving member of the embodiment is two first nuts 51 which can move up and down, and the first nut 51 is provided with a first driving block 511 on at least one lateral side for driving the push rod to move up, and the upper end surface of the first driving block 501 forms a first driving surface 5011. The left side of the vertical rod of the corresponding first push rod 31 and the right side of the vertical rod of the second push rod 32 are respectively provided with a notch which is adapted to the upper end of the first driving block and is downward, and the end surface of the notch towards the lower side forms a driven surface 3025. The two first nuts 51 are respectively screwed on a screw rod 56 provided on the motor shaft of the motor 55, and when the two first nuts 51 are alternately pushed up by the screw rod on the rotating motor shaft, the first driving surface on the upper end of the first driving block 511 respectively pushes against the first driven part of the first push rod and the second push rod, and drives the corresponding push rod to move up alternately, and the first push rod 31 and the second push rod 32 which move up alternately drive a group of first pulling harrows 11 and a group of second pulling harrows 12 to move up alternately until the highest position, and when moving up to the highest position, they are guided by the self-guiding structure to retract towards the inside of the lateral direction of the fixed seat, and the two nuts 51 move down alternately, and the first push rod 31 and the group of first pulling harrows 11 and the second push rod 32 and the group of second pulling harrows 12 follow the downward movement under the action of gravity, and are guided by the guiding structure to extend outwardly to the lateral direction of the fixed seat, so that the harrow teeth are exposed to the harrow slot hole to hook the woven fabric and pull the woven fabric downward in the downward stroke, and in the process of alternating upward and downward movement of the first pulling harrow 11 and the second pulling harrow 12, the harrow head of the second pulling harrow is always below the harrow head of the first pulling harrow, and the first pulling harrow and the second pulling harrow perform repeated pulling actions of alternating upward and downward movement until the weaving is completed.

[0066] The embodiment also moves the two first nuts 51 up and down simultaneously, so as to drive a group of first pulling harrows 11 and a group of second pulling harrows 12 to move up simultaneously and move down under the action of gravity.

[0067] According to the design of the present application, more push rods can be used to support a row of pulling harrows according to actual needs, which can not only reduce the length of the push rod to increase the rigidity, but also realize different upward driving of a row of pulling harrows. For example, the first push rod 31 and the second push rod 32 are respectively provided with two, and the first group of first pulling harrows and the second group of second pulling harrows are divided into two parts in the lateral direction, and the first pulling harrow 11 and the second pulling harrow 12 of the two parts are respectively supported on the two first push rods 31 and the two second push rods 32. Embodiment two

[0068] The embodiment is another arrangement of pulling mechanism based on the same mechanism as the above embodiment. The same as embodiment 1 is that there are two groups of pulling harrows with harrow heads at two levels, and the first pulling harrow 11 of the first group and the second pulling harrow 12 of the second group are guided by the guide structure as described in embodiment 1 to slide up and down and rotate in the fixed seat 91. The length of the harrow handle of the first pulling harrow 11 is longer than that of the second pulling harrow 12. The first pulling harrow 11 and the second pulling harrow 12 are arranged alternately to form an alternating arrangement unit.

[0069] But different from embodiment 1, the harrow handle 102 of the first pulling harrow 11 and the second pulling harrow 12 in the same alternating arrangement unit is arranged in the same harrow groove 911, so that the harrow head of one first pulling harrow in the first group of pulling harrows and the harrow head of one second pulling harrow in the second group of pulling harrows are at the same transverse position at different heights to form a further defined first alternating arrangement unit, and the first alternating arrangement units are arranged transversely in series to form a row of pulling harrows, and the first group of pulling harrows and the second group of pulling harrows in the row of pulling harrows are supported on the first push rod and the second push rod respectively.

[0070] The pulling harrow structure of the embodiment is slightly different from that of embodiment 1. The harrow handle 102 of the first pulling harrow 11 and the second pulling harrow 12 is symmetrically arranged in the same harrow groove 911 of the fixed seat 91, respectively deviating to the left and right sides of the harrow head 103. The width of the harrow handle of the first pulling harrow 11 and the second pulling harrow 12 is smaller than the width of the harrow groove and not greater than the width of the harrow head, as shown in Figure 8 The width of the rectangular teeth 311 on the corresponding first push rod 31 and second push rod 32 is reduced to adapt to the reduced width of the harrow handle.

[0071] And in the embodiment, the first push rod 31 and the first push rod 32 are driven by a common driving member. The driving member is also a first nut 51 as in embodiment 1, which is screwed on the rotating shaft of the motor, as shown in Figure 10 The first nut 51 alternately drives the first push rod 31 and the first push rod 32 through the swing of the first switching swing rod 61 and the third switching swing rod 63. The first nut 51 is provided with first driving blocks 501 on the transverse two sides, and the top end face and the bottom end face of the two first driving blocks 501 form the first driving face 5011 and the fourth driving face 5013 respectively. The first switching swing rod and the third switching swing rod are arranged on the inner side of the inner cavity of the fixed seat, as shown in Figure 11 and Figure 12 The first switching swing rod 61 includes a first long arm rod 611 and a first short arm rod 612 rotating on the same axis, and the third switching swing rod 63 includes a driving gear short rod 631 and a driven gear long rod 632 meshing with each other. The first long arm rod and the first short arm rod and the driving gear short rod and the driven gear long rod are arranged staggered in the transverse direction. The vertical rod of the first push rod 31 and the second push rod 32 is provided with a sliding groove 3022, which is matched withFigure 5 The second push rod is different from the first push rod in that a sliding groove 3022 is arranged at the lower part of the vertical rod to receive the pushing of the third switching swing rod 63; the first short arm rod and the driving gear short rod are respectively in contact with the first driving surface 5011 and the fourth driving surface 5013 of the first nut 51, and the first long arm rod and the driven gear long rod are respectively in sliding connection with the sliding grooves 3022 on the vertical rods of the first push rod 31 and the second push rod 32; the first nut 51 moves upward, the first driving surface 5011 pushes the first short arm rod to make the first long arm rod swing upward, the first nut 51 moves downward, the fourth driving surface 5013 pushes the driving gear short rod to rotate and makes the driven gear long rod that is in meshing with each other swing upward, the first switching swing rod and the driven gear long rod swing upward and push the first push rod 31 and the second push rod 32 to move upward alternately and successively, so that the first pulling rake 11 and the second pulling rake 12 are repeatedly and alternately moved upward and downward, and the pulling action is completed.

[0072] According to the design of the present application, the first phase interval arrangement unit with an odd number and the first phase interval arrangement unit with an even number are not limited to being supported by one push rod, and more push rods can be used to support one row of pulling rakes according to actual needs, so that the length of the push rod can be reduced to increase the rigidity, and different upward pushing of one row of pulling rakes can be realized. For example, as shown in Figure 9 As shown, the first push rod 31 and the second push rod 32 can be provided in two, and the transverse width of the two first push rods 31 and the two second push rods 32 is half of the push rod in the first embodiment, so that the two first push rods 31 and the two second push rods 32 can be arranged side by side in the fixed seat 91; one group of first pulling rakes 11 and one group of second pulling rakes 12 are divided into two parts in the transverse direction, and the two parts of the one group of first pulling rakes 11 and the one group of second pulling rakes 12 are supported on the two first push rods 31 and the two second push rods 32, respectively, and a first push rod 31 and a second push rod 32 corresponding to each other are driven by a first nut 51 cooperating with a first switching swing rod 61 and a third switching swing rod 63, as shown in Figure 8 As shown, the first push rod 31 and the second push rod 32 can be provided in two, and the transverse width of the two first push rods 31 and the two second push rods 32 is half of the push rod in the first embodiment, so that the two first push rods 31 and the two second push rods 32 can be arranged side by side in the fixed seat 91; one group of first pulling rakes 11 and one group of second pulling rakes 12 are divided into two parts in the transverse direction, and the two parts of the one group of first pulling rakes 11 and the one group of second pulling rakes 12 are supported on the two first push rods 31 and the two second push rods 32, respectively, and a first push rod 31 and a second push rod 32 corresponding to each other are driven by a first nut 51 cooperating with a first switching swing rod 61 and a third switching swing rod 63, as shown in Embodiment Three

[0073] This embodiment is a further design of the pulling device for the flat knitting machine provided with the pulling needle comb 2 based on the above-mentioned embodiments, and is further designed based on the first embodiment.

[0074] The pulling mechanism therein is as shown in Figure 13 , Figure 14 and Figure 15, with the same first pulling rake 11 and second pulling rake 12 as in the above-mentioned embodiment one, and similarly, the several first pulling rakes 11 arranged in transverse direction form a first group of pulling rakes, and the several second pulling rakes 12 arranged in transverse direction form a second group of pulling rakes, the first group of pulling rakes and the second group of pulling rakes are respectively supported on the first pushing rod and the second pushing rod, and the first pulling rake and the second pulling rake are arranged adjacently to form a second interlaced arrangement unit, and the second interlaced arrangement unit is arranged in transverse direction to form a row of pulling rakes.

[0075] The pulling needle comb 2 is arranged in transverse direction, and each pulling needle comb 2 is arranged in the transverse direction interval position of a row of pulling rakes, or arranged in the transverse direction interval position of the second interlaced arrangement unit of a row of pulling rakes, and the pulling needle comb 2 is arranged in the fixed seat 91 through the guiding structure and can slide up and down and rotate, and is pushed by the upward pushing of the pushing member, and the pushing member for pushing the pulling needle comb 2 in this embodiment is the third pushing rod, and the pulling needle comb 2 is supported on the third pushing rod 33.

[0076] As shown in Figure 16 , the pulling needle comb 2 includes the needle comb rod 22 and the pulling hook 21 arranged on the upper end of the needle comb rod 22, and is guided by the guiding structure to move up and down and swing, and the guiding structure of the pulling rake 1 and the pulling needle comb 2 in this embodiment includes the shaft pin arranged on the fixed seat, and the shaft pin 43 includes the upper shaft pin and the lower shaft pin arranged in parallel, and the guiding groove is arranged on the rake handle and the needle comb rod, and the rake handle of the pulling rake 1 and 2 is provided with the first guiding groove as in the first embodiment, and the needle comb rod 22 of the needle comb rod is provided with the second guiding groove 42, and the second guiding groove 42 includes the second oblique straight groove 421 and the second straight groove 422 arranged in vertical direction, and the second oblique straight groove 421 is composed of the straight groove segment and the upper oblique groove segment and the lower oblique groove segment connected on the upper end and the lower end of the outer side of the straight groove segment, the upper oblique groove segment is the oblique groove segment inclined upward and outward of the fixed seat, and the lower oblique groove segment is the oblique groove segment inclined downward and outward of the fixed seat, and the upper oblique groove segment is symmetrically arranged with the lower oblique groove segment with respect to the center line of symmetry of the second oblique straight groove 421 in the height direction. When the upper shaft pin 43 moves relatively to the upper end of the straight groove segment to the upper oblique groove segment, the pulling needle comb 2 swings relatively to the lower shaft pin 43 to the inner side of the fixed seat 91, and forms the retracting state of the pulling hook on the pulling needle comb to the inner side of the fixed seat, and Figure 25 , when the upper shaft pin 43 moves relatively to the upper oblique groove segment to the upper end of the straight groove segment, the pulling needle comb 2 swings relatively to the lower shaft pin 43 to the outer side of the fixed seat 91, and forms the extending state of the pulling hook on the pulling needle comb to the outer side of the fixed seat, and Figure 25 , when the upper shaft pin 43 moves relatively to the upper end of the straight groove segment to the lower oblique groove segment, the pulling needle comb 2 swings relatively to the lower shaft pin 43 to the inner side of the fixed seat 91, and forms the retracting state of the pulling hook on the pulling needle comb to the inner side of the fixed seat, and Figure 25 , as shown in the c drawing.

[0077] In combination Figure 17 and Figure 18 , the first push rod 31, the second push rod 32 and the third push rod 33 are pushed upward by two second nuts 52 driven by the motor 55, two first switching swing rods 61 and two second switching swing rods 62, the two second nuts alternately push the corresponding first switching swing rods 61 to swing, to alternately push the first push rod 31 and the second push rod 32 to move upward, at least one of the two second nuts drives the corresponding second switching swing rod 62 to swing to drive the third push rod 33 to move upward. The embodiment also provides a tension spring 72 and a swing piece 71, and a fixed plate 8 is provided in the fixed seat, as shown in Figure 19 and Figure 20 , the tension spring 72 is connected between each pulling rake 1 and the swing piece 71 and each pulling needle comb 2 and the fixed plate 8, so that when the pulling rake 1 and the pulling needle comb 2 pull the knitted fabric downward, in addition to the gravity when moving downward, the tension spring also provides pulling force downward.

[0078] The embodiment adopts a push rod which is basically the same as the structure of the first embodiment, which can be referred to Figure 6 and Figure 7 , the first push rod 31 and the first push rod 32 are composed of a horizontal rod 301 and a vertical rod 302 connected perpendicularly at the lower end of the horizontal rod, and are placed in a left-right symmetrical structure, and the two vertical rods thereon are placed on the opposite side of the two second nuts. As shown in Figure 21 , the third push rod 33 has a plate-shaped body, a guide sliding block 331 is provided on the lower end of the plate-shaped body relative to the center position of the inner side of the fixed seat, and a downward extending touch end 332 is provided corresponding to the two second switching swing rods 62, the two touch ends 332 are respectively corresponding to the opposite side of the two second nuts, the two first switching swing rods 61 and the two second switching swing rods 62 are placed on the inner side of the fixed seat relative to the inner and outer directions of the fixed seat, the two first switching swing rods 61 are respectively corresponding to the positions of the first push rod 31 and the second push rod 32, and the two second switching swing rods 62 are placed on the touch end positions of the two third push rods, the switching swing rods are in contact with the second nuts 52 and are respectively in movable connection with the corresponding push rods, so that when pushed upward by the second nuts 52, the four switching swing rods are swung upward, and when moved downward, they are swung downward.

[0079] The pulling rake 1, the pulling needle comb 2, the first push rod 31, the first push rod 32, the third push rod 33, the first switching swing rod, the second switching swing rod, the second nut 51, the tension spring 72, the swing piece 71 and the fixed plate 8 are all arranged in the inner cavity of the fixed seat 91, and the outer side of the fixed seat 91 is covered with a fixed panel 92.

[0080] As shown in Figure 22As shown, the inner cavity of the fixing base 91 is provided with a plurality of vertically arranged and horizontally parallel rake grooves 911 and needle comb grooves 912, and the rake grooves 911 and the needle comb grooves 912 are arranged alternately in the horizontal direction corresponding to the pulling rake 1 and the pulling needle comb 2, the rake handle 12 of each pulling rake 1 and the needle comb rod 22 of each pulling needle comb 2 are respectively inserted into a rake groove 911 and a needle comb groove 912, and the shaft pin in the guide structure of the embodiment is a long shaft pin, the groove side wall of the rake groove 911 and the needle comb groove 912 is provided with a corresponding shaft pin hole 915, two shaft pins arranged in parallel are transversely through all the rake grooves 911 and the needle comb grooves 912 and the shaft pin holes 915, and are respectively connected to the first inclined groove 411 and the first straight groove 412 on the rake handle inserted into the rake groove 911 and the second inclined groove 421 and the second straight groove 422 on the needle comb rod inserted into the needle comb groove.

[0081] Continuing to refer to Figure 22 , the middle part of the inner cavity of the fixing base 91 is provided with two horizontally parallel nut grooves 914 and two horizontally parallel push rod grooves 913, and the inner side of the middle part of the inner cavity of the fixing base 91 is further provided with a hinge groove, the hinge groove includes two swing piece hinge grooves 917 provided on one side of the inner side of the two nut grooves 914 and two switch swing rod hinge grooves 916 provided on the two symmetrical sides above the swing piece hinge grooves 917, the two switch swing rod hinge grooves 916 correspond to the positions of the two first switch swing rods and the two second switch swing rods respectively, and the swing piece 71 and the switch swing rod are respectively hinged in the swing piece hinge groove 917 and the switch swing rod hinge groove 916.

[0082] The fixing base of the present application further includes a fixing plate 8, which is arranged in the inner cavity of the fixing base in parallel with the cavity bottom surface of the middle part of the inner cavity, and forms a space 919 with the cavity bottom surface of the middle part of the inner cavity to accommodate the first push rod and the second push rod, the first push rod 31 and the second push rod 32 are slidably arranged in the space in a manner that the opposite surfaces of the first push rod and the second push rod are in close contact with each other, and the vertical rod of the first push rod and the vertical rod of the second push rod are respectively arranged in a push rod groove, the outer side of the fixing plate is provided with a sliding guide groove matched with the sliding guide block of the third push rod, and the third push rod slides on the outer side of the fixing plate and between the fixing plate 92 and the fixing panel 93. The inner cavity of the fixing base 91 is provided with a motor groove 918 communicated with the nut groove, the body of the motor driving the second nut is accommodated in the motor groove 918, the motor shaft provided with a screw rod and screw-connected with the nut is accommodated in the nut groove 914, the nut screw-connected with the motor shaft moves up and down along the nut sliding groove, and the moving stroke of the second nut 52 can be controlled by the motor.

[0083] As Figure 27As shown, the second nut 52 is provided with a first driving block 501 and a second driving block 502 on the two sides of the body respectively, the top end surface of the first driving block 501 and the second driving block 502 respectively forms a first driving surface 5011 and a second driving surface 5021, and the first driving surface 5011 is higher than the second driving surface 5021, and the side surface of the first driving block 501 perpendicular to the top end surface forms an abutting surface 5012, which is directed to the inside of the fixed seat 91.

[0084] The driving blocks on the two sides of the second nut 52 are respectively used to drive a first switching swing rod 61 and a second switching swing rod 62 to swing, as shown in Figure 11 and Figure 28 As shown, the first switching swing rod 61 is used to push the first push rod 31 or the second push rod 32, and the structure is the same as that of the second embodiment, and the second switching swing rod 62 is used to push the third push rod 33 and includes a second long arm rod 621 and a second short arm rod 622 which rotate on the same axis, the first long arm rod is shorter than the second long arm rod, the two first switching swing rods 61 and the two second switching swing rods 62 are arranged on the same axis, the first short arm rod 612 of the first switching swing rod 61 and the second short arm rod 622 of the second switching swing rod are used to respectively receive the driving of the first driving block 511 and the second driving block 512 on the second nut 52, when the first switching swing rod 61 swings to make the first short arm rod disengage the first driving surface 5011, the end surface 613 of the first short arm rod is opposite or abuts against the abutting surface 5012 of the first driving block, as shown in Figure 29 In this state, the movement of the second nut 52 is only the sliding of the abutting surface 5012 of the first driving block relative to the end surface 613 of the first short arm rod, and the second nut cannot push the first switching swing rod, so the driving of the first switching swing rod is stopped. One end of the first long arm rod 611 of the two first switching swing rods 61 is used to push the first push rod and the second push rod respectively, and one end of the second long arm rod 621 of the two second switching swing rods 62 is used to push the two contact ends of the third push rod respectively, so that one end of the first long arm rod and the second long arm rod respectively forms a driving end. The driving end of the two long arm rods is slidably connected with the sliding contact groove 3022 of the corresponding push rod, and the side surface of the driving end is provided in an arc shape to reduce the friction force of sliding.

[0085] In combination with the design of the switching swing rod, the more specific design of the push rod can be seen from Figure 6, the long arm of the first switching swing rod 61 is arranged on the vertical rod 302 of the push rod, and the vertical rod of the two push rods is provided with a sliding groove 3022, the first driving end 612 of the two first switching swing rods is arranged in the sliding groove 3022 of the first push rod and the sliding groove 3022 of the second push rod respectively, and because the second long arm of the second switching swing rod 62 is longer than the first long arm of the first switching swing rod 61, the swing amplitude is large, and the sliding length is also increased, so that the moving stroke of the pulling comb 2 is greater than the moving stroke of the pulling rake 1.

[0086] Furthermore, the thickness of the horizontal rod 301 is designed to be 1 / 2 of the thickness of the vertical rod 302, the upper end of the vertical rod 302 is provided with a groove 3021 with a depth suitable for the thickness of the horizontal rod 301, the side surface of the horizontal rod 301 corresponding to the groove is flush with the groove bottom surface of the vertical rod 302, forming a sliding surface 3024 coplanar with the horizontal rod and the vertical rod, the first push rod 31 and the second push rod 32 are arranged in abutment with the sliding surface 3024, so that the inner and outer side surfaces of the vertical rod 302 of the first push rod 31 and the second push rod 32 are coplanar, and the horizontal rods 301 of the first push rod 31 and the second push rod 32 are arranged inside and outside, the horizontal rod of the first push rod is on the inside of the horizontal rod of the second push rod 32, and when the two horizontal rods drive the first pulling rake 11 and the second pulling rake 12 arranged in the interval to move up and down, they will not interfere with each other, and the groove 3021 provides the possibility for the horizontal rods of the two push rods to move up and down in a space with a width of only one vertical rod thickness.

[0087] In this embodiment, at least two sliding protrusions 3023 are arranged on the side of the vertical rod of the push rod corresponding to the push rod groove, the groove width of the push rod groove on the fixed seat 91 is suitable for the width of the sliding protrusion, and the first push rod 31 and the second push rod 32 move up and down by sliding in the push rod groove through the sliding protrusion, thereby reducing the guide surface and reducing the sliding friction.

[0088] Again, as shown in Figure 15 and Figure 18 , the embodiment further comprises a push rod position adjusting unit 90, the two adjusting units 90 are symmetrically arranged below the fixed seat, and are used for adjusting the lowest position of the two push rods (that is, adjusting the stroke of the push rod), which can be seen from Figure 9Located on both sides of the fixed base, the push rod position adjustment unit 90 includes an adjustment rod 901 for receiving the push rod as it moves downward, a nut seat 902 at one end of the adjustment rod, and an adjustment screw 903 screwed to the nut seat. On the symmetrical sides of the fixed base below the fixed base, there are respectively a placement groove for placing the adjustment rod, a nut seat sliding groove communicating with the placement groove for slidingly connecting the nut seat 902, and a screw groove located below and communicating with the sliding groove. The screw is rotatable but not vertically movable within the screw groove. In this embodiment, the adjustment rod 901 is a horizontally positioned rod. Rotating the adjustment screw 903 causes the nut seat to move vertically along the nut seat sliding groove, thereby causing the horizontally positioned adjustment rod to move vertically. When the push rod moves downward, its position follows the upward or downward movement of the adjustment rod, thus adjusting the stroke of the push rod's vertical movement.

[0089] A further feature of the adjustment unit 90 is that a protruding block is provided at the position of the adjustment rod corresponding to the push rod, so as to reduce the overall upward movement surface of the adjustment rod when the horizontally positioned adjustment rod moves upward, and minimize the interference to other components when the adjustment rod moves upward.

[0090] like Figure 26 As shown, the fixed panel 92 is provided with rake groove holes 921 and needle comb groove holes 922 that are adapted to the traction rake 12 and traction needle comb 22 which are arranged laterally. When the traction rake 12 and traction needle comb 22 are in the "retracted state" and "extended state" respectively, the rake teeth 122 and the traction hook 222 can be retracted and extended relative to the fixed panel through the rake groove holes 921 and the needle comb groove holes 922.

[0091] In this embodiment, both ends of the tension spring 72 are provided with hooks, which are combined with Figure 3 and Figure 16 Both the pull rake and the pull needle comb are provided with hook holes 701 for hooking the tension spring hooks. Each pull rake 1 and each pull needle comb 2 located above the inner cavity of the fixed base respectively receive the hook of the corresponding tension spring at one end through the hook hole; the hooks hooked to the other end of the tension spring of the pull rake 1 and the pull needle comb 2 respectively are hooked to the swing member 71 and the fixed plate 8.

[0092] like Figure 20As shown, the swing member 71 includes two hinged parts 711 with hinge holes and a connecting rod 712 connected to the swing ends of the two hinged parts and arranged laterally. The connecting rod is provided with a plurality of hook holes 701 arranged laterally in parallel. The swing member is hinged to the swing member hinge groove 917 of the fixed base 91 by the hinge holes of the hinged parts. The other end of the tension spring hooked on each pulling rake 1 is hooked to the hook hole 701 at the corresponding position of the connecting rod. Since the two swing member hinge slots 917 are located below the two nut slots 914, and the hinge part has a space 702 through which the screw passes, when the nut moves down to the position corresponding to the hinge part, it can push the hinge part to control the angle of the swing member 71, thereby controlling the tension of the tension spring 72 corresponding to the pulling rake and controlling the pulling force of the pulling rake. Since this embodiment uses the two second nuts to alternately move up and down to push the first pulling rake 11 and the second pulling rake 12 to alternately pull the woven fabric, it is possible to control the two nuts so that one nut is always in the lower position against the swing member 71, so that the swing member 71 maintains a certain angle. The angle of the swing member 71 can be adjusted by controlling the lowest position of the second nut. The pulling force of the pulling rake can be adjusted during the weaving pulling process without stopping the machine for adjustment. When the second nut 52 moves down to the bottom of the corresponding push rod and abuts against the adjusting rod 93 of the position adjusting unit, the push rod reaches the maximum position, and the second nut can continue to move down to push the swing member 71, so that the pulling force of the pulling rake applied by the tension spring reaches the set value.

[0093] like Figure 19 As shown, the lower end of the fixed plate 8 has several parallel spring holes 701. The other end of the spring hooked on the pull needle comb 2 is hooked on the hook hole 701 at the corresponding position of the connecting rod. The fixed plate 8 has a clearance slot hole 81 at the second long arm corresponding to the second switching swing arm to allow the second long arm to pass through, so that the second long arm can extend from the inside of the fixed plate to the outside to push the third push rod 33. The fixed plate 8 has a guide sliding groove 82 on the outer side of the fixed seat 91 for sliding connection of the guide sliding block 331. The third push rod 33 is slidably disposed on the outer side of the fixed plate 8.

[0094] Before starting the knitting process, at least one set of pull rakes 1 and pull needle combs 2 must be pushed to their highest positions, such as... Figure 29 As shown in Figure a, a second nut 52 is moved upward by a motor 32. Since the first driving surface 5011 is higher than the second driving surface 5021, the first driving surface 5011 first pushes the first switching lever 61 to swing upward. The first driven part 611 of the long arm on the lever drives the first push rod 31 and the second push rod 32 to move upward. The first push rod 31 and the second push rod 32 push the first pulling rake 11 and the second pulling rake 12 upward until they reach the highest position. Figure 29Position shown in Fig. b, the position is the same as the retracted position of the first pulling rake 1; the second driving surface 5121 pushes the second switching swing rod 62 to swing upward, the second driven part 621 of the long arm rod pushes the third push rod 33 to move upward, the third push rod 33 pushes the pulling needle comb 2 to move upward until the highest position close to the cylinder mouth, as shown in Fig. c. Figure 29 Position shown in Fig. a, the position is the same as the retracted position of the first pulling rake 1; the first driving surface 5011 pushes the first switching swing rod 61 to swing upward, the first driven part 611 (i.e. one side of the first short arm rod) slides relative to the first driving surface 5011 while the first driven part 611 on the short arm rod is driven upward by the first driving surface 5011 to swing, when the first pulling rake 1 is in the retracted position at the highest position, the first driven part 611 of the first short arm rod slides out of the first driving surface 5011, and the end surface 613 of the first short arm rod is opposite to (abuts against) the abutting surface below the driving surface 5111 as the driving surface 5111 continues to move upward, as shown in Fig. b. Figure 30 Position shown in Fig. b, the end surface 613 is basically in a vertical state, the second nut 52 continues to move upward, the abutting surface 5012 on the second nut 52 slides relative to the end surface 613 of the first short arm rod, the abutting surface 5012 limits the swing of the first switching swing rod 61, and the first pulling rake 1 is maintained at the highest position.

[0095] When the bottom knitting starts, at least one group of the first pulling rake 11 and the pulling needle comb 2 are at the highest position, as shown in Fig. c. Figure 29At the position shown in FIG. 12A, the upper second nut 52 is driven to move downward by the motor 32. At this time, the abutting surface 5012 of the first driving block 501 is opposite to the end surface 613 of the first short arm of the first switching swing rod 61, so the downward movement of the first driving block 501 cannot drive the first switching swing rod 61 to swing downward. At this time, the downward movement of the second driving surface 5021 can drive the second switching swing rod 62 to swing downward, and the pulling comb 2 is driven to move downward under the action of the weight and the tension spring 72. In the initial stage of the downward movement, the pulling comb 2 swings from the retracted state to the extended state, the pulling hook 21 pulls the knitted fabric and pulls it downward. In this process, the first driving block 511 moves downward with the downward movement of the nut until the abutting surface slides out of the end surface of the first short arm of the first switching swing rod 61. At this time, the pulling comb 2 moves downward to the highest working position of the pulling rake 1, and the abutting surface 5012 of the first driving block 501 no longer limits the rotation of the first switching swing rod 61. The first switching swing rod 61 swings downward with the downward movement of the second nut 51, and the first pulling rake 11 starts to move downward under the action of the weight and the tension spring 72, and is guided by the guide structure to swing from the retracted state to the extended state. The tines 11 pull the knitted fabric, and at the same time, the pulling comb 2 is guided by the guide structure to swing from the extended state to the retracted state, and is disengaged from the pulling of the knitted fabric. The pulling comb 2 moves downward to the lowest position, and the bottom knitting pulling is completed. Subsequently, by controlling the highest position of the upward movement of the two nuts, the nuts no longer drive the pulling comb. If the second nut 52 corresponding to the first push rod 31 continues to move downward, the first pulling rake 11 continues to move downward until it is guided by the guide structure to swing from the extended state to the retracted state, and is disengaged from the pulling of the knitted fabric. The first pulling rake 11 moves downward to the lowest position, and completes one stroke of pulling of the knitted fabric. The second nut 52 abuts against the swing member 71, and then the second nut 52 corresponding to the second push rod 32 moves upward to drive the second pulling rake 12 to move upward. Then, the second nut 52 corresponding to the second push rod 32 moves downward to drive the second pulling rake 12 to move downward to pull the knitted fabric. The second nut 52 corresponding to the second push rod 32 abuts against the swing member 71. By controlling the two second nuts 52 by the motor 55, the above-mentioned alternating upward and downward movements of the two second nuts 52 are repeated, so that the first pulling rake and the second pulling rake are alternately moved upward and downward to alternately pull the knitted fabric. By controlling the stroke of the two second nuts 52 by the motor 52, the two second nuts 52 only repeatedly drive the first switching swing rod 61 but not the second switching swing rod 62, so that the first pulling rake and the second pulling rake are repeatedly and alternately moved upward and downward to repeatedly complete one stroke of pulling until the knitting is completed. When the tines 11 of the pulling rake 1 move upward with the pulling of the knitted fabric, the tines 11 rotate downward relative to the rake head 13, the tines 11 are retracted, are disengaged from the knitted fabric, and slide upward along the knitted fabric. When the tines 11 move downward, the tines 11 hook the knitted fabric, and gradually rotate upward relative to the rake head 13, and are supported to effectively pull the knitted fabric. Embodiment Four

[0096] The pulling device of the flat knitting machine of the present embodiment adopts the pulling rake 1, the pulling needle comb 2 and the transverse arrangement mode of the pulling rake 1 and the pulling needle comb 2 shown in Embodiment Three, and the supporting mode of the pulling rake 1 and the pulling needle comb 2 on the corresponding push rod and the mode of the pulling rake 1 and the pulling needle comb 2 being respectively inserted into the rake slot 911 and the needle comb slot 912 in the inner cavity of the fixed seat are also the same, but the driving mode of the push rod of the present embodiment is different from that of Embodiment Three.

[0097] As shown in Figure 32 , the present embodiment directly pushes the push rod with a nut, the nut is driven by a screw rod on the motor shaft, the nut includes two first nuts 51 and one third nut 53, the two first nuts 51 are used to alternately drive the first push rod 31 and the second push rod 32 to move upward in sequence, and the third nut 53 is used to drive the third push rod 33 to move upward. The present embodiment does not adopt the switching swing rod 61, 62 for switching power as adopted in Embodiment Three, but adopts a third nut separately driven by a motor to push the third push rod, thereby increasing one motor but simplifying the pulling mechanism.

[0098] The structure of the first nut 51 and the first push rod 31 and the second push rod 32 is the same as that of Embodiment One; as shown in Figure 34 , the third nut 53 is provided with a third driving block 503 extending outward from the fixed plate, the top end surface of the third driving block 503 constitutes a third driving surface 5031, as shown in Figure 33 , the lower end of the third push rod 33 is provided with a touch end 332, and the two touch ends 332 are arranged on both sides of the guide sliding block 331, as shown in Figure 35 , the fixed plate 8 is provided with a clearance slot hole 81 corresponding to the position of the third driving block 503, the third driving block 503 extends outward from the outer side surface of the fixed plate through the clearance slot hole 81 and is attached below the touch end 332, and the third nut 53 pushes the touch end 332 of the third push rod through the third driving surface on the top end of the third driving block to drive the pulling needle comb 2 supported thereby to move upward. The inner cavity of the fixed seat 91 is adaptively provided with three parallel nut slots, the third nut 53 is arranged in the middle nut slot, and the two first nuts 51 are arranged in the nut slots on both sides.

[0099] In the present embodiment, each pulling needle comb 2 is arranged between every two adjacent pulling rakes, and the driving process of the first pulling rake, the second pulling rake and the pulling needle comb during the base knitting is the same as that of Embodiment Three, except that they are separately driven by two first nuts and one third nut. Embodiment Five

[0100] The pulling device of the flat knitting machine of the present embodiment is based on Embodiment Two, and is additionally provided with the pulling needle comb 2 and the corresponding third push rod 53 and the third nut shown in Embodiment Four, as shown in Figure 31As shown, the pull needle comb 2 and the alternating units in the same rake groove 911 are arranged laterally at intervals. The inner cavity of the fixing base 91 is provided with three parallel nut grooves adapted to the corresponding nut positions, wherein: the third nut 53 is set in the middle nut groove, and the two first nuts 51 are set in the nut grooves on both sides. Furthermore, the first nut 51 cooperates with the first switching rocker arm 61 and the third switching rocker arm 63 to alternately drive the first push rod 31 and the second push rod 32, and the third nut 53 drives the third push rod alone. Example 6

[0101] The pulling device for the horizontal knitting machine in this embodiment adopts a first pulling rake 11 and a second pulling rake 12 as shown in Embodiment 2. The first pulling rake 11 and the second pulling rake 12 are arranged alternately. The pulling needle comb 13 is arranged at the interval position of the adjacent pulling rakes, and the adjacent first pulling rakes 11 and second pulling rakes 12 form an alternating arrangement unit. In the same alternating arrangement unit, the rake handles 102 of the first pulling rake 11 and the second pulling rake 12 are arranged in the same rake groove 911, forming a further... The first phase arrangement unit is defined in the first step. The first phase arrangement unit is arranged horizontally continuously to form a row of pull rakes. The phase arrangement units of this row of pull rakes are grouped and arranged according to the sequence number of the arrangement. The arrangement is carried out according to the odd sequence number and the even sequence number to form two arrangement groups with odd sequence number and even sequence number. That is, there are two arrangement groups containing the first phase arrangement unit with odd sequence number and the first phase arrangement unit with even sequence number. The pull rakes corresponding to the two arrangement groups are supported on the first push rod 31 and the second push rod 32 respectively.

[0102] like Figure 36 As shown, in this embodiment, the push rod is driven by a first nut 51 and a third nut 53, which are driven by a motor, and a switching lever. The switching lever includes a first switching lever 61 and a third switching lever 63. The first nut 51 drives the first switching lever 61 and the third switching lever 63 to swing by moving upward and downward, respectively. The swinging first switching lever 61 and the third switching lever 63 push the first push rod 31 and the second push rod 32 to move upward, so that the first push rod and the second push rod move upward alternately. The third nut 53 is used to drive the third push rod 33 to move upward independently.

[0103] The first nut 51 and the corresponding first switching lever 61 and third switching lever 63 are the same as in Embodiment 2. The third nut 53 and the corresponding third push rod 33 are the same as in Embodiment 5. The fixed base 91 is provided with two nut slots symmetrically at the transverse center. The first nut 51 and the third nut 53 are set in the two nut slots. The corresponding first push rod 31 and second push rod 32 are no longer symmetrically arranged. Instead, the two vertical rods are biased to the left to be driven by the first nut 51. The guide sliding block 331 of the third push rod 33 is no longer set in the middle position. Instead, it is biased to the right to be driven by the third nut 53.

[0104] According to the design of the present application, the number of push rods can also be set to four, including two first push rods 31 and two second push rods 32 arranged side by side, the lateral width of which is half of the push rod in Embodiment One, so that the two first push rods 31 and the two second push rods 32 can be arranged side by side in the fixed seat 91 respectively; the several interlaced arrangement units arranged side by side are divided into two parts in the lateral direction, the odd-numbered interlaced arrangement units and the even-numbered interlaced arrangement units in one part are arranged on a first push rod 31 and a second push rod 32 respectively, and the odd-numbered interlaced arrangement units and the even-numbered interlaced arrangement units in the other part are arranged on another first push rod 31 and another second push rod 32 respectively; a corresponding first push rod 31 and a second push rod 32 are driven by a third nut 53 cooperating with a first switching swing rod 61 and a third switching swing rod 63 as shown in Figure 36 Fig. 6B. Embodiment Seven

[0105] The pulling device of the flat knitting machine of the present embodiment adopts the same first pulling rake 11, second pulling rake 12 and pulling needle comb 2 as well as the same supporting mode of the push rod as Embodiment Six, but the driving of the push rod is different from Embodiment Six, as shown in Figure 37 Fig. 6B.

[0106] The first switching swing rod 61 has the same structure as Embodiment Three, and the third switching swing rod 63 has the same structure as Embodiment Two, as shown in Figure 38 Fig. 6B.

[0107] The basic structure of the first push rod 31 and the second push rod 32 is the same as in Embodiment 2. Both vertical rods are provided with sliding grooves 3022, but the position of the vertical rod relative to the horizontal rod varies depending on the contact position of the fourth nut on the first switching rocker arm. The first short arm of the first switching rocker arm 61 and the driving gear short rod of the third switching rocker arm 63 can respectively contact the first driving surface 5011 and the fourth driving surface 5013 of the fourth nut 54. The first long arm and the driven gear long rod are slidably connected to the sliding grooves on the vertical rods of the first push rod 31 and the second push rod 32, respectively. The fourth nut 54 moves upward, pushing the first short arm through the first driving surface to make the first switching rocker arm 61 swing upward. The first switching rocker arm 61 pushes the first pulling rake 11 upward. When the first driven part of the first short arm disengages from the first driving surface 5011, the end face 613 of the first short arm abuts against the abutting surface 5012 of the first driving block. In this state, the fourth nut 54 moves, forming the first driving... The sliding of the abutment surface 5012 of the block relative to the end face 613 of the first short arm prevents the fourth nut 54 from pushing the first switching lever. The fourth nut 54 continues to move upward, pushing the third push rod 33 and the pulling needle comb 2 upward through the third drive surface 5031. The fourth nut 54 moves downward, and the pulling needle comb 2 moves downward under the action of gravity and tension spring. When the abutment surface 5012 of the first drive block disengages from the end face 613 of the first short arm, the fourth nut 54 continues to move downward, and the first pulling rake 11 moves downward under the action of gravity and tension spring. At the same time, it pushes the drive gear short rod to rotate through the fourth drive surface 5013 and causes the driven gear long rod with meshing teeth to swing upward. The upward swinging driven gear long rod pushes the second push rod 32 and the second pulling rake 12 upward.

[0108] During the initial knitting process, the driving process of the first pulling rake, the second pulling rake, and the pulling needle comb is the same as in Example 3, except that they are driven in segments by the fourth nut.

[0109] In this embodiment, the swing element for adjusting the pulling force of the traction rake is a tension spring adjusting plate 73, such as... Figure 39 As shown, the tension spring adjusting plate 73 is adjustable up and down on the outside of the fixed plate 8. Each pulling rake is connected to the tension spring adjusting plate 73 by a tension spring 72, and each pulling needle comb 2 is connected to the fixed plate 8 by a tension spring 72. The pulling rake and the pulling needle comb form a downward pulling force to pull the knitted fabric by their own weight and the tension of the tension spring. Example 8

[0110] Based on the principle of this invention, more sets of pulling rakes can be set. This embodiment provides a case with a third set of pulling rakes, such as... Figure 40As shown, the embodiment is based on the basis of example three, and a third group of pulling rakes is added, which is formed by a plurality of third pulling rakes 13. The structure of the third pulling rake 13 is basically the same as that of the first pulling rake 11 and the second pulling rake 12 in example three, except that the rake handle length is shorter than that of the first pulling rake 11 and longer than that of the second pulling rake 12, so that the rake head height of the third pulling rake 13 is lower than that of the first pulling rake 11 but higher than that of the second pulling rake 12, so that the pulling rake arranged in the fixed seat forms three layers of rake heads with different heights.

[0111] The first pulling rake 11, the second pulling rake 12 and the third pulling rake 13 are arranged in sequence and alternately, and the rake heads in the first pulling rake 11, the second pulling rake 12 and the third pulling rake 13 are in three horizontal positions on the left and right, that is, the rake handles of the three pulling rakes are inserted into the three rake grooves 911 in the fixed seat 91 in sequence and arranged in two adjacent horizontal positions, forming the second alternate unit as described above, and a row of pulling rakes is formed by the horizontal continuous arrangement of the second alternate unit.

[0112] The fourth push rod 34 is also provided in the embodiment, and the first pulling rake 11, the second pulling rake 12 and the third pulling rake 13 in a row of pulling rakes are supported on the first push rod 31, the second push rod 32 and the fourth push rod 34 in sequence, respectively. The structure of the first push rod 31 and the second push rod 32 is basically the same as that in example three, except that the thickness of the horizontal rod is one third of the thickness of the vertical rod, and a groove 3021 with a depth matching the thickness of the horizontal rod 301 is arranged on one side of the upper end of the vertical rod 302 in the thickness direction, so that the side surface of the horizontal rod 301 corresponding to the groove is flush with the groove bottom surface of the vertical rod 302, forming two sliding surfaces of the horizontal rod and the vertical rod in the same plane; the fourth push rod 34 supporting the pulling needle comb has the same basic structure as the first push rod 31 and the second push rod 32, except that the horizontal rod is arranged at the middle of the upper end of the vertical rod in the thickness direction, and grooves with a depth matching the thickness of the horizontal rod are arranged on both sides of the upper end of the vertical rod in the thickness direction, so that the side surfaces of the horizontal rod are flush with the groove bottom surfaces of the vertical rod corresponding to the grooves, forming two sliding surfaces of the horizontal rod and the vertical rod in the same plane, so that the horizontal rods of the first push rod 31, the fourth push rod 34 and the second push rod 32 are arranged in sequence with the sliding surfaces abutting each other, as shown. Figure 41

[0113] The nut of the embodiment includes three first nuts 51, and the inner cavity of the fixed seat 91 is adaptively provided with three parallel nut grooves, and the three first nuts 51 are arranged in parallel in the three nut grooves. The structure of the three first nuts 51 is the same as that of example one, and they respectively drive the first push rod 31, the second push rod 32 and the fourth push rod 34.

[0114] ​The pulling rakes in the row can also be arranged as the second phase interval arrangement units according to the needs, and the pulling rakes in the row are arranged according to the second phase interval arrangement unit numbers, for example, three groups of number arrangement groups are formed, the numbers of the first group are 1, 4, 7,..., the numbers of the second group are 2, 5, 8,..., and the numbers of the third group are 3, 6, 9,..., and the pulling rakes corresponding to the second phase interval units of the numbers of the three groups are respectively supported on the first push rod, the second push rod and the fourth push rod. Embodiment nine

[0115] In the embodiment, the pulling pin comb 2 shown in the embodiment four and the corresponding third push rod 53 and third nut are additionally arranged on the basis of the embodiment eight, as shown in Figure 42 and 43 The difference is that the pulling pin comb 2 is arranged at intervals with the pulling rakes.

[0116] The nut of the embodiment includes a first nut 51 and two second nuts 52, and the inner cavity of the fixing seat 91 is adaptively provided with three parallel nut grooves, the first nut 53 is arranged in the middle nut groove, and the two second nuts 51 are arranged in the two side nut grooves. The two second nuts are the same as those in the embodiment three, and drive the first push rod 31, the second push rod 32 and the pulling pin comb 2 in cooperation with the two first switching swing rods 61 and the two second switching swing rods 62. The first nut is the same as that in the embodiment one and drives the fourth push rod 34 alone. Embodiment ten

[0117] In the embodiment, the design is based on the embodiment two, and the difference from the embodiment two is that, as shown in Figure 44 A plurality of phase interval arrangement units are grouped and arranged according to odd or even arrangement numbers, two arrangement groups are formed, and the two arrangement groups are respectively supported on the first push rod 31 and the second push rod 32.

[0118] The technical solutions of the application are not limited to the above embodiments, for example, the driving member in the application can also be a rack driven by a gear, therefore, all the technical solutions obtained by equivalent replacement fall within the scope of protection of the application.

Claims

1. A multi-layered horizontal knitting machine pulling device, comprising a plurality of pulling mechanisms respectively arranged symmetrically on the front and rear sides below the needle plate of the horizontal knitting machine, each pulling mechanism comprising a fixed base, a driving member, a pushing member that moves up and down under the action of the driving member, a first set of pulling rakes arranged horizontally side by side and pushed upward by the pushing member, and a fixed panel covering the outside of the fixed base and having rake groove holes, wherein the pulling rakes are guided by a guiding structure and include a rake handle and a rake head provided at the upper end of the rake handle and having rake teeth, characterized in that: The second group of pulling rakes is arranged transversely in parallel, the rake heads of different groups of pulling rakes are respectively arranged at different layer height positions, and the rake head of the first group of pulling rakes is arranged at the position of the rake head of the uppermost layer. The pulling rake in each group of pulling rakes is pushed upward by the pushing member and is pushed to the respective highest position. The pulling rake at the highest position is guided by the self-guiding structure to present a retracting state of retracting to the inner side of the transverse direction of the fixed seat. The pulling rake at the highest position is followed by the pushing member to move downward at least under the action of its own gravity and is guided by the guiding structure to present an extending state of extending to the outer side of the transverse direction of the fixed seat. The tines are extended out of the rake slot hole of the fixed panel to hook the woven fabric and pull the woven fabric downward in the downward stroke. The pulling rake participating in the pulling action is repeatedly pushed upward by the pushing member and is followed by the pushing member to move downward until the weaving is completed.

2. The draw frame of claim 1, wherein: The different groups of pulling rakes are arranged in a set arrangement sequence and are arranged in an interlaced manner with an interlaced number, form an interlaced arrangement unit, and are arranged transversely in succession with the interlaced arrangement units to form a row of pulling rakes.

3. The draw frame of claim 2, wherein: The pushing member is a push rod, the number of the push rod is at least the same as the number of the groups of pulling rakes, the same group of pulling rakes in the row of pulling rakes is supported on at least one push rod, or the interlaced arrangement units in the row of pulling rakes are grouped according to the arrangement sequence to form a plurality of grouped groups, the number of the grouped groups is at least the same as the number of the groups of pulling rakes, and the pulling rakes corresponding to the interlaced arrangement units of each grouped group are supported on at least one push rod.

4. The draw frame of claim 3, wherein: The interlaced arrangement unit is composed of at least one pulling rake in the first group of pulling rakes and one pulling rake in the second group of pulling rakes which are transversely adjacent.

5. The draw frame of claim 4, wherein: The interlaced arrangement unit includes a first interlaced arrangement unit and a second interlaced arrangement unit. The rake head of one pulling rake in the first group of pulling rakes and the rake head of one pulling rake in the second group of pulling rakes which are transversely adjacent are arranged at the same transverse position at different heights to form the first interlaced arrangement unit. The rake head of one pulling rake in the first group of pulling rakes and the rake head of one pulling rake in the second group of pulling rakes which are transversely adjacent are arranged at two transverse positions at different heights to form the second interlaced arrangement unit.

6. The draw frame of claim 5, wherein: The push rod includes a first push rod and a second push rod. The first group of pulling rakes and the second group of pulling rakes in the row of pulling rakes arranged according to the first interlaced arrangement unit are respectively supported on the first push rod and the second push rod, or the pulling rakes corresponding to the first interlaced arrangement units of the odd-numbered grouped groups and the pulling rakes corresponding to the first interlaced arrangement units of the even-numbered grouped groups are respectively supported on the first push rod and the second push rod. The first group of pulling rakes and the second group of pulling rakes in the row of pulling rakes arranged according to the second interlaced arrangement unit are respectively supported on the first push rod and the second push rod, or the pulling rakes corresponding to the second interlaced arrangement units of the odd-numbered grouped groups and the pulling rakes corresponding to the second interlaced arrangement units of the even-numbered grouped groups are respectively supported on the first push rod and the second push rod.

7. The draw frame of claim 6, wherein: The first push rod and the second push rod each include a horizontal rod with a plate-shaped body and a vertical rod. The horizontal rod is vertically connected to the upper end of the vertical rod, and the upper end of the horizontal rod is provided with a plurality of transversely arranged rectangular teeth for supporting the lower end of the rake handle of the pulling rake.

8. The draw frame of claim 7, wherein: The first push rod and the second push rod are arranged in the inner cavity of the fixed seat in a sliding manner with part of the opposite surfaces abutting against each other.

9. The draw frame of claim 8, wherein: The driving member is a nut moving up and down along the screw rod, and the screw rod is arranged on the rotating shaft of the motor.

10. The draw down device for a top and bottom multi-layer draw down flat knitting machine of claim 9, wherein: The nut comprises two first nuts, and when the two first nuts move up, the first nut and the second nut push the first push rod and the second push rod respectively, so that the first push rod and the second push rod move up.

11. The draw down device for a top and bottom multi-layer draw down flat knitting machine of claim 9, wherein: The first switching swing rod and the third switching swing rod are further included, the nut comprises a first nut, the first nut drives the swing of the first switching swing rod and the third switching swing rod when the first nut moves up and down, and the swinging first switching swing rod and the third switching swing rod push the first push rod and the second push rod to move up respectively, so that the first push rod and the second push rod move up alternately. The first driving block is arranged on the lateral side of the first nut, the top end surface and the bottom end of the first driving block form the first driving surface and the fourth driving surface respectively, the side surface of the driving block perpendicular to the top end surface forms the abutting surface, the first switching swing rod and the third switching swing rod are arranged on the inner side of the push rod in the inner cavity of the fixed seat, the first switching swing rod comprises a first long arm and a first short arm rotating on the same axis, and the third switching swing rod comprises a driving gear short rod and a driven gear long rod meshing with each other, the vertical rod of the first push rod and the second push rod is provided with a sliding groove, the first short arm and the driving gear short rod can touch the first driving surface and the fourth driving surface of the first nut respectively, the first long arm and the driven gear long rod are in sliding connection with the sliding grooves on the vertical rods of the first push rod and the second push rod, the first short arm is pushed by the first driving surface moving up to swing the first switching swing rod upward, the driving gear short rod is rotated by the fourth driving surface moving down and the driven gear long rod meshing with each other swings upward, and the swinging first switching swing rod and the driven gear long rod push the first push rod and the second push rod to move up respectively and alternately.

12. A drawframe for a top and bottom multi-layer flat knitting machine according to claim 10 or 11, characterised in that: The guiding structure comprises a shaft pin and a guiding groove in relative motion, the shaft pin is arranged on the fixed seat, the fixed seat further comprises a fixed plate, the inner cavity of the fixed seat is provided with a plurality of rake grooves arranged laterally side by side and used for inserting and connecting the rake handles of the pulling rakes, the shaft pin comprises an upper shaft pin and a lower shaft pin arranged in parallel up and down and penetrating through all the rake grooves, the lower part of the rake groove is provided with two lateral guiding grooves guiding the up and down movement of the first push rod and the second push rod respectively, the fixed plate is fixed on one side outside the guiding groove, the first push rod and the second push rod are arranged on the inner side of the fixed plate and can slide up and down, and the motor is arranged in the inner cavity of the fixed seat below the fixed plate and the nut rotatingly connected with the screw rod on the rotating shaft of the motor is in the adaptive position of driving the corresponding push rod.

13. The draw down device of claim 12, wherein: The pulling rakes comprise at least a first pulling rake and a second pulling rake, the rake handle of the first pulling rake is longer than that of the second pulling rake, and the first group of pulling rakes and the second group of pulling rakes are respectively composed of the first pulling rake and the second pulling rake.

14. The draw down device of claim 13, wherein: The rake handles of the first pulling rake and the second pulling rake in the second phase arrangement unit are of the same width and are adapted to the width of the rake groove on the fixed seat, the center lines of the rake heads and the rake handles are coincident, and the width of the rake handle is not wider than the width of the rake head.

15. The draw down device of claim 13, wherein: The rake handles of the first pulling rake and the second pulling rake in the first phase arrangement unit are symmetrically arranged in one rake groove by being deviated to the left side and the right side of the rake head respectively, the width of the rake handle of the first pulling rake and the second pulling rake is smaller than the width of the rake groove and not greater than the width of the rake head.

16. The draw down device for a top and bottom multi-layer draw down flat knitting machine of claim 13, wherein: Still further comprising a plurality of tension springs and tension spring adjusting plates or swing members, the tension spring adjusting plates being adjustably arranged on the outside of the fixed plate or being hingedly arranged in the inner cavity of the fixed seat at one end of the swing members, each of the tension rakes being connected to the tension spring adjusting plates or the swing members at the other end by a tension spring, and the tension rakes being pulled downward by the weight and the tension force of the tension springs.

17. The draw down device of claim 9, wherein: Still further comprising a group of pulling needle combs arranged in parallel laterally and being pushed upward by the pushing members, the fixed panel being further provided with needle comb slots, the pulling needle combs being guided by the guide structure composed of the axially movable shaft pins and the guide slots and comprising needle comb rods and pulling hooks arranged at the upper ends of the needle comb rods, the pulling needle combs being at least arranged at the spaced positions between the adjacent two interlaced rows; during the initial knitting, the pulling hooks of the pulling needle combs are extended out of the needle comb slots of the fixed panel to the highest positions of the pulling needle combs which are higher than the highest positions of the tension rakes and close to the cylinder mouth, and are guided by the guide structure to be in the retracted state which is retracted inwardly in the lateral direction of the fixed panel, the pulling needle combs at the highest positions are followed to be lowered down by the pushing members and are followed to be lowered down at least by the gravity, and are guided by the guide structure to be in the extended state which is extended outwardly in the lateral direction of the fixed seat at the beginning of the lowering, the pulling hooks are extended out of the rake slots of the fixed panel to hook the knitted fabric and pull the knitted fabric downwardly in the lowering stroke, the pulling needle combs are guided by the guide structure to be in the retracted state which is retracted inwardly in the lateral direction of the fixed panel at the end of the lowering stroke to be disengaged from the pulling of the initial knitted fabric, and the pulling needle combs are no longer pushed upwardly by the pushing members.

18. The draw down device of claim 17, wherein: The pushing rods further comprise a third pushing rod, and a group of pulling needle combs are supported on the third pushing rod, the third pushing rod having a plate-shaped body, and the plate-shaped body being provided with a guide sliding block at the lower end relative to the inner side of the fixed seat.

19. The draw down device of claim 18, wherein: The nuts comprise two first nuts and one third nut, the one third nut being used to drive the third pushing rod to move upwardly, and the two first nuts being used to respectively drive the first pushing rod and the second pushing rod to move upwardly.

20. The draw down device of claim 18, wherein: The nuts further comprise two second nuts and at least one second switching swing rod, the two second nuts being used to respectively drive the corresponding one first switching swing rod to swing upwardly, the two first switching swing rods which swing upwardly respectively push the first pushing rod and the second pushing rod to move upwardly, and at least one of the two second nuts being further used to drive the second switching swing rod to swing upwardly, the second switching swing rod which swings upwardly pushes the third pushing rod to move upwardly. The nuts further comprise two second nuts and at least one second switching swing rod, the two second nuts being used to respectively drive the corresponding one first switching swing rod to swing upwardly, the two first switching swing rods which swing upwardly respectively push the first pushing rod and the second pushing rod to move upwardly, and at least one of the two second nuts being further used to drive the second switching swing rod to swing upwardly, the second switching swing rod which swings upwardly pushes the third pushing rod to move upwardly. The first switching swing rod comprises a first long arm rod and a first short arm rod rotating on the same axis, and the second switching swing rod comprises a second long arm rod and a second short arm rod rotating on the same axis, the second long arm rod being longer than the first long arm rod; the second nut is provided with a first driving block and a second driving block on the two sides in the transverse direction, the top end surfaces of the first driving block and the second driving block form a first driving surface and a second driving surface, respectively, the first driving surface being higher than the second driving surface, and the vertical side surface below the top end surface of the first driving block forms an abutting surface; the vertical rods of the first push rod and the second push rod are provided with sliding grooves, and the third push rod is provided with a triggering end below; the two first short arm rods are respectively in contact with the first driving surfaces of the corresponding second nuts, and the two first long arm rods are in sliding connection with the sliding grooves on the vertical rods of the first push rod and the second push rod; the second short arm rod is in contact with the second driving surface of the third nut, and the second long arm rod is in contact with the triggering end of the third push rod; the two first driving surfaces are alternately moved upward to respectively push the corresponding first short arm rods, so that the corresponding first switching swing rods swing upward and the end portions of the first short arm rods move relative to the first driving surfaces, the first switching swing rods swinging upward push the first push rod or the second push rod to move upward through the sliding connection of the first long arm rod and the first push rod or the second push rod, and when the end portion of the first short arm rod slides out of the first driving surface, the first short arm rod is separated from the pushing of the second nut, and when the second driving surface continues to move upward, the first short arm rod is opposite to the abutting surface, the first push rod or the second push rod remains at the position when the first push rod or the second push rod is separated from the pushing of the second nut, until the abutting surface moves out and is no longer opposite to the end portion of the first short arm rod.

21. The draw down device for a top and bottom multi-layer draw down flat knitting machine of claim 18, wherein: The first switching swing rod and the third switching swing rod are further included, the nut comprises a fourth nut, the fourth nut is used to drive the swing of the first switching swing rod and the upward movement of the third push rod, and drive the swing of the third switching swing rod, the swinging first switching swing rod and the third switching swing rod alternately push the first push rod and the second push rod to move upward, respectively and in sequence; The first and third switching swing rods are arranged on one side of the inner side of the fixed plate and correspond to the vertical rods of the first and second push rods, respectively. The first switching swing rod comprises a first long arm rod and a first short arm rod rotating on the same axis, and the third switching swing rod comprises a driving gear short rod and a driven gear long rod in meshing engagement with each other. Two first driving blocks and a third driving block are arranged on the two sides of the transverse direction of the four nuts and opposite to the outer side of the fixed plate. The top and bottom end faces of the two first driving blocks form first and fourth driving faces, respectively, and the top end face of the third driving block forms a third driving face. The first driving face is higher than the third driving face, and the vertical side face below the top end face of the first driving block forms an abutting face. The vertical rods of the first and second push rods are each provided with a sliding groove, and the third push rod is provided below with a touch end pushed by the third driving face. The first short arm rod and the driving gear short rod can touch the first and fourth driving faces of the first nut, respectively, and the first long arm rod and the driven gear long rod are in sliding connection with the sliding grooves on the vertical rods of the first and second push rods, respectively. The first short arm rod is pushed by the first driving face to make the first switching swing rod swing upward, and when the end of the first short arm rod slides out of the first driving face, it is separated from the pushing of the fourth nut, and when the first driving face continues to move upward, it abuts against the abutting face. The first push rod remains in the position when it is separated from the pushing of the fourth nut until the abutting face moves out and no longer abuts against the end of the first short arm rod. The fourth driving face pushes the driving gear short rod to rotate and makes the driven gear long rod in meshing engagement swing upward. The first switching swing rod and the driven gear long rod swing upward to push the first and second push rods to move upward, respectively, and the third driving face moves upward to push the third push rod to move upward through the third touch face.

22. The draw down device of a multi-layered warp knitting machine according to claim 19 or 20 or 21, wherein: The shaft pin in the guide structure is arranged on the fixed seat, the fixed seat further comprises a fixed plate, the inner cavity of the fixed seat is provided with a plurality of rake grooves and a plurality of needle comb grooves arranged in parallel in the transverse direction and used for inserting and connecting the rake handles and the needle comb rods, and the rake grooves and the needle comb grooves are arranged in transverse spacing matching the rake and the needle comb. The shaft pin comprises an upper shaft pin and a lower shaft pin arranged in parallel in the up and down direction and passing through all the rake grooves and the needle comb grooves. The lower side of the rake grooves and the needle comb grooves is provided with two transversely parallel guide grooves for guiding the up and down movement of the first and second push rods, respectively. The fixed plate is fixed on one side of the outer side of the guide groove, the first and second push rods are arranged on the inner side of the fixed plate and can slide up and down, and the third push rod is arranged on the outer side of the fixed plate and can slide up and down. The motor is arranged in the inner cavity of the fixed seat below the fixed plate, and the nut rotated by the screw rod on the rotating shaft of the motor is in a matching position with the corresponding push rod driven by the motor.

23. The draw down device of claim 22, wherein: The rake at least comprises a first rake and a second rake, and the rake handle of the first rake is longer than that of the second rake. The first group of rakes and the second group of rakes are respectively composed of the first rake and the second rake.

24. The draw down device of claim 23, wherein: The rake handles of the first rake and the second rake in the second rake combination have the same width and are matched with the width of the rake grooves on the fixed seat, and the symmetry center lines of the rake heads and the rake handles coincide. The width of the rake handle is not wider than the width of the rake head.

25. The draw down device of claim 23, wherein: The rake handles of the first and second pulling rakes in the pulling rake combination are symmetrically arranged in a rake slot, respectively on the left and right sides of the rake head transversely, and the rake handle width of the first and second pulling rakes is less than the rake slot width and not greater than the rake head width.

26. The draw down device for a top and bottom multi-layer draw down flat knitting machine of claim 23, wherein: The pulling rakes are connected to the pulling needle combs by a plurality of tension springs, and the pulling rakes and the pulling needle combs form downward pulling force by their own weight and the pulling force of the tension springs to pull the knitted fabric.

27. The draw down device of claim 3, wherein: The third group of pulling rakes is arranged below the second group of pulling rakes from top to bottom.

28. The draw down device of claim 27, wherein: The pushing member is a pushing rod, and the pushing rod includes a first pushing rod, a second pushing rod, and a fourth pushing rod.

29. The draw down device of claim 27, wherein: The first group of pulling rakes, the second group of pulling rakes, and the third group of pulling rakes are arranged in the interlaced arrangement unit to form a row of pulling rakes, and the pulling rakes in the first group, the second group, and the third group are respectively supported on the first pushing rod, the second pushing rod, and the fourth pushing rod.

30. The draw down device of claim 28, wherein: The first pushing rod, the second pushing rod, and the fourth pushing rod each include a horizontal rod and a vertical rod, the horizontal rod is vertically connected to the upper end of the vertical rod, and the upper end of the horizontal rod is provided with a plurality of rectangular teeth arranged transversely and side by side for supporting the lower end of the rake handle of the pulling rake.

31. The draw down device for a top and bottom multi-layer draw down flat knitting machine of claim 29, wherein: The first pushing rod, the second pushing rod, and the fourth pushing rod are arranged in the inner cavity of the fixed seat in a sliding manner with the opposite surfaces of the first pushing rod and the second pushing rod and the second pushing rod and the fourth pushing rod abutting each other.

32. The draw down device of claim 31, wherein: The driving member is a nut moving up and down along a screw rod arranged on the rotating shaft of the motor.

33. The draw down device of claim 32, wherein: The nut includes three first nuts for driving the first pushing rod, the second pushing rod, and the fourth pushing rod to move upward, respectively.

34. The draw down device of claim 33, wherein: The shaft pin in the guide structure is arranged on the fixed seat, the fixed seat further includes a fixed plate, the inner cavity of the fixed seat is provided with a plurality of rake slots arranged transversely and side by side and used for inserting the rake handle of the pulling rake, the shaft pin includes an upper shaft pin and a lower shaft pin arranged in parallel from top to bottom and passing through all the rake slots, the lower part of the rake slot is provided with three transversely arranged guide grooves for guiding the upward and downward movement of the first pushing rod, the second pushing rod, and the fourth pushing rod, respectively, the fixed plate is fixed on one side outside the guide groove, and the first pushing rod, the second pushing rod, and the fourth pushing rod are arranged in the inner side of the fixed plate in a slidable manner, and the motor is arranged below the inner cavity of the fixed seat and the nut connected with the screw rod on the rotating shaft of the motor is in an adaptive position for pushing the corresponding pushing rod.

35. The draw down device of claim 34, wherein: The pulling rakes include first pulling rakes, second pulling rakes, and third pulling rakes, the rake handle of the first pulling rake is longer than that of the second pulling rake, the rake handle of the second pulling rake is longer than that of the third pulling rake, and the first group of pulling rakes, the second group of pulling rakes, and the third group of pulling rakes are respectively composed of the first pulling rakes, the second pulling rakes, and the third pulling rakes.

36. The draw down device of claim 35, wherein: The interphase arrangement unit is composed of one pulling rake in the first group of pulling rakes, one pulling rake in the second group of pulling rakes and one pulling rake in the third group of pulling rakes, the rake handle widths of the first pulling rake, the second pulling rake and the third pulling rake in the interphase arrangement unit are the same and are adapted to the rake slot width on the fixed seat, and the symmetric center lines of the rake head and the rake handle coincide, and the rake handle width is not wider than the rake head width.

37. The draw down device for a top and bottom multi-layer draw down flat knitting machine of claim 36, wherein: Further comprising a plurality of tension springs and tension spring adjusting plates or swing members, the tension spring adjusting plates are adjustably arranged on the outside of the fixed plate or are hingedly connected to the inner cavity of the fixed seat at one end of the swing member, and each pulling rake is connected to the tension spring adjusting plate or the swing end of the swing member by a tension spring, and the pulling rake is pulled downward by the weight and the tension force of the tension spring.

38. The draw down device for a top and bottom multi-layer draw down flat knitting machine of claim 33, wherein: Further comprising a group of pulling needle combs which are arranged in parallel and are pushed upward by the pushing member, and the fixed panel is further provided with needle comb slot holes, the pulling needle comb is guided by a guide structure composed of an axially movable shaft pin and a guide slot and comprises a needle comb rod and a pulling hook arranged at the upper end of the needle comb rod, and the pulling needle comb is at least in the interval position between the adjacent two interphase arrangement units; during the starting weaving, the pulling needle comb is pushed upward by the upward movement of the pushing member, the pulling hook is stretched out from the needle comb slot of the fixed panel to the highest position of the pulling needle comb which is higher than the highest position of the pulling rake and close to the cylinder port, and is guided by the guide structure to the retracting state of retracting to the inside of the transverse direction of the fixed panel, the pulling needle comb at the highest position follows the downward movement of the pushing member and is at least under the action of its own gravity, and is guided by the guide structure to the stretching-out state of stretching out to the outside of the transverse direction of the fixed seat at the initial stage of the downward movement, the pulling hook is stretched out from the rake slot hole of the fixed panel to hook the woven fabric and pulls the woven fabric downward in the downward movement stroke, and at the end of the downward movement stroke, the pulling needle comb is guided by the guide structure to the retracting state of retracting to the inside of the transverse direction of the fixed panel to release the pulling of the starting woven fabric, and the pulling needle comb is no longer pushed upward by the upward movement of the pushing member.

39. The draw down device of claim 38, wherein: The pushing rod further comprises a third pushing rod, and a group of pulling needle combs are supported on the third pushing rod, and the third pushing rod has a plate-shaped body, and the plate-shaped body is provided with a guide sliding block on the lower end relative to the inner side of the fixed seat.

40. The draw down device of claim 39, wherein: Further comprising two first switching swing levers and at least one second switching swing lever, the nut comprises a first nut and two second nuts, and the two second nuts are used to respectively drive one corresponding first switching swing lever to swing upward, the two first switching swing levers which swing upward respectively push the first pushing rod and the second pushing rod to move upward, and at least one of the two second nuts is also used to drive the second switching swing lever to swing upward, the second switching swing lever which swings upward pushes the third pushing rod to move upward, and a first nut is used to push the fourth pushing rod to move upward.

41. The draw down device of claim 40, wherein: The shaft pin in the guide structure is arranged on the fixed seat, the fixed seat further comprises a fixed plate, the inner cavity of the fixed seat is provided with a plurality of rake slots and a plurality of needle comb slots arranged transversely and used for inserting the rake handle and the needle comb rod of the pulling rake and the pulling needle comb, and the rake slots and the needle comb slots are arranged transversely and alternately with the transverse direction of the pulling rake and the pulling needle comb, the shaft pin comprises an upper shaft pin and a lower shaft pin arranged transversely and parallelly through all the rake slots and the needle comb slots, the lower part of the rake slots and the needle comb slots is provided with three transversely arranged guide slots for guiding the upward and downward movement of the first push rod, the second push rod and the fourth push rod respectively, the fixed plate is fixed on one side outside the guide slots, the first push rod, the second push rod and the fourth push rod are arranged slidably on the inner side of the fixed plate, and the third push rod is arranged slidably on the outer side of the fixed plate, the motor is arranged in the inner cavity of the fixed seat below the fixed plate, and the nut rotated and connected with the screw rod on the rotating shaft of the motor is in a matched position with the corresponding push rod driven by the motor.

42. The draw down device of claim 41, wherein: The pulling rake comprises a first pulling rake, a second pulling rake and a third pulling rake, the rake handle of the first pulling rake is longer than that of the second pulling rake, the rake handle of the second pulling rake is longer than that of the third pulling rake, and the first group of pulling rakes, the second group of pulling rakes and the third group of pulling rakes are respectively composed of the first pulling rake, the second pulling rake and the third pulling rake.

43. The draw down device of claim 42, wherein: The interlaced arrangement unit is composed of one pulling rake in the first group of pulling rakes, one pulling rake in the second group of pulling rakes and one pulling rake in the third group of pulling rakes which are arranged transversely, the rake handle widths of the first pulling rake, the second pulling rake and the third pulling rake in the interlaced arrangement unit are the same and are matched with the width of the rake slot on the fixed seat, and the symmetric center line of the rake head and the rake handle is coincident, and the rake handle width is not wider than the rake head width.

44. The draw down device of claim 43, wherein: Further comprising a plurality of tension springs and a tension spring adjusting plate or a swing piece, the tension spring adjusting plate is arranged adjustably on the outer side of the fixed plate or is hinged to the inner cavity of the fixed seat at one end of the swing piece, each pulling rake is connected to the swing end of the tension spring adjusting plate or the swing piece through a tension spring, and each pulling needle comb is connected to the fixed plate through a tension spring, and the pulling rake and the pulling needle comb form downward pulling force through the weight and the tension of the tension spring to pull the knitted fabric.

45. The draw down device of claim 3, wherein: Further comprising a push rod position adjusting unit arranged on the two lateral sides below the fixed seat, the push rod position adjusting unit comprises an adjusting rod for receiving the downward falling position of the push rod, a nut seat arranged at one end of the adjusting rod and an adjusting screw rod screwed to the nut seat, the lateral sides below the fixed seat are respectively provided with a placing slot for placing the adjusting rod, one lateral side below the placing slot is provided with a nut seat sliding slot communicated with the placing slot, and a screw rod slot communicated with the nut seat sliding slot is arranged below the nut seat sliding slot, the nut seat is arranged slidably in the nut seat sliding slot, the adjusting screw rod is arranged rotatably and non-slipably in the screw rod slot, and the adjusting rod is adjusted upwardly or downwardly by rotating the adjusting screw rod, so that the falling position of the push rod is adjusted following the upwardly or downwardly movable adjusting rod.

46. A flat knitting machine characterized by The flat knitting machine adopts the upward and downward multi-layer pulling device of the flat knitting machine of any one of claims 1-45.

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