Alternate-traction traction device for flat knitting machine and flat knitting machine

Abstract

The invention relates to an alternate traction traction device for a flat knitting machine, which comprises a plurality of traction mechanisms, and each traction mechanism comprises a fixed seat, a driving piece moving up and down, a pushing piece moving up and down along with the action control of the driving piece, a traction rake pushed by the upward movement of the pushing piece, and a fixed panel covering the outer side of the fixed seat, the traction rakes comprise the first traction rakes and the second traction rakes, and the first traction rakes and the second traction rakes are alternately arranged in the transverse direction at intervals one by one. The first traction harrow and the second traction harrow are respectively pushed by the upwards-moving pushing piece to alternately 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 initial stage 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. Therefore, the traction width can be made to be in a narrow range limited physically, the situation that the weaving quality is affected due to the fact that local fabric retracts due to the fact that no traction force exists in the weaving process is avoided, and the traction requirements needed by different weaving structures can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to an alternating pulling cross-knitting machine pulling device, belonging to the technical field of cross-knitting machines. BACKGROUND

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

[0003] At present, full-form cross-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 fabric, and many knitting styles cannot be done.

[0005] The corresponding pulling device of the pulling rake can be seen in the granted invention patents: CN112663218B, CN113026191B, and CN112663219B, although it can better complete the pulling action required by the full-form knitting process of the cross-knitting machine, the effect is obviously better than that of the roller device, and it has been widely used, but it has the following shortcomings:

[0006] 1. The basic pulling width is formed by several pulling rakes driven at the same time, which makes the pulling width wider, and cannot adapt to the local narrow twisting or local non-pulling knitting requirements.

[0007] 2. When the pulling rakes complete the local pulling action and go up, the corresponding local fabric is in a state of no pulling force, which makes the fabric easily shrink back to the cylinder direction under the action of its own elasticity, affecting the knitting quality.

[0008] 3. In addition, since the pulling starting position of the pulling rakes acting on the fabric is relatively far from the knitting cylinder, the pulling of the initial knitting requires a base needle comb device and an opening and closing device that coordinates the lifting comb in the base needle comb device with the machine head of the cross-knitting machine and the pulling rake, which makes the manufacturing cost high, and the size of the pulling force of the base needle comb needs to be strictly controlled. The position control of the torque motor used is not very accurate, which can easily cause misoperation and further cause serious needle collision accidents.

[0009] 4. In addition, when the pulling rakes pull the fabric, there is usually a problem of easily pulling the edge of the loop to make it larger and longer (commonly known as large eyes), and the fabric surface is hooked by the needle, which cannot be allowed, thereby affecting the fabric surface quality. SUMMARY

[0010] In order to solve the problems existing in the prior art, the present application provides a pulling device for a cross-knitting machine, and the specific scheme is as follows:

[0011] A pulling device for a horizontal knitting machine with alternating pulling includes several pulling mechanisms respectively arranged symmetrically on the front and rear sides below the needle plate of the horizontal knitting machine. Each pulling mechanism includes a fixed base, a vertically movable driving member, a pushing member slidably mounted on the fixed base and moving vertically with the movement of the driving member, pulling rakes arranged horizontally side-by-side and pushed upwards by the pushing member, and a fixed panel covering the outside of the fixed base and having rake groove holes. The pulling rakes are guided by a guide structure and have rotatable rake teeth. The device is characterized in that: each pulling rake includes a first pulling rake and a second pulling rake, with one set of first pulling rakes and one set of second pulling rakes arranged horizontally... The first and second pulling rakes are arranged alternately at intervals. They are pushed upward by the upward-moving pusher and move upward alternately. When they reach the highest position, they are guided by their own guide structure to retract inward in the lateral direction of the fixed seat. The first and second pulling rakes move downward with the pusher and, at least under their own weight, move downward alternately from their respective highest positions. At the beginning of the downward movement, they are guided by the guide structure to extend outward in the lateral direction of the fixed seat, so that the rake teeth are exposed in the rake groove holes, hook the woven fabric, and pull the woven fabric downward during the downward movement. The first and second pulling rakes repeatedly move upward and downward alternately until the weaving is completed.

[0012] The alternating pulling device for the horizontal knitting machine also includes a set of pulling needle combs arranged horizontally side by side, which are pushed upward by a pushing member. The pulling needle combs are provided with pulling hooks and are located at the horizontal intervals of the pulling rake and are guided by a guide structure. The fixed panel is also provided with needle comb slots. During the initial knitting, the pulling needle combs are pushed upward by the upward pushing member, passing through the needle comb slots to the highest position near the opening of the cylinder, which is higher than the highest position of the pulling rake. They are then guided by the guide structure to retract inward in the horizontal direction of the fixed panel. The pulling needle combs at the highest position move downward with the pushing member and at least follow downward under their own weight. At the beginning of the downward movement, they are guided by the guide structure to extend outward in the horizontal direction of the fixed seat, so that the pulling hooks are exposed in the needle comb slots to hook the knitted fabric and pull the knitted fabric downward during the downward movement. At the end of the downward movement, the pulling needle combs are guided by the guide structure to retract inward in the horizontal direction of the fixed panel and disengage from the knitted fabric. The pulling needle combs are no longer pushed upward by the pushing member.

[0013] The pushing component is a push rod, which includes a first push rod, a second push rod, and a third push rod.

[0014] The first set of first pulling rakes and the second set of second pulling rakes are respectively supported on the first push rod and the second push rod, and the set of pulling needle combs is supported on the third push rod.

[0015] The first push rod and the second push rod each comprise 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 in parallel in the horizontal direction and used for supporting the lower end of the handle of the pulling rake; the first push rod and the second push rod are arranged in the inner cavity of the fixed seat in a sliding manner with the opposite surfaces of the first push rod and the second push rod abutting against each other; 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 one side of the inner side of the fixed seat.

[0016] The pulling rake comprises a rake handle and a rake head arranged at the upper end of the rake handle, and the rake teeth are arranged on the rake head; the pulling needle comb comprises a needle comb rod, and the pulling hook is arranged at the upper end of the needle comb rod.

[0017] 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.

[0018] The fixed seat further comprises a fixed plate, a plurality of rake grooves and a plurality of needle comb grooves are arranged in parallel in the horizontal direction above the inner cavity of the fixed seat and are used for slidingly connecting the handle of the pulling rake and the needle comb rod of the pulling needle comb, the rake grooves and the needle comb grooves are arranged in the horizontal direction in a manner matched with the pulling rake and the pulling needle comb, two horizontal push rod grooves are arranged below the rake grooves and the needle comb grooves and are used for guiding the up-and-down movement of the first push rod and the second push rod, respectively, the fixed plate is fixed to one side of the outer side of the push rod grooves, and the first push rod and the second push rod are arranged between the fixed plate and the inner cavity of the fixed seat in a slidable manner, the fixed plate is provided with a guide sliding groove used for slidingly connecting the guide sliding block relative to one side of the outer side of the fixed seat, and the third push rod is arranged outside the fixed plate in a slidable manner, the motor is arranged in the inner cavity of the fixed seat below the fixed plate, and the nut rotatably connected to the screw rod on the rotating shaft of the motor is arranged in a matched position with the pushed push rod.

[0019] The nut comprises two first nuts, and the two first nuts are used to alternately drive the first push rod and the second push rod to move upward.

[0020] The first nut is provided with a first driving block on at least one side in the horizontal direction, the top end surface of the first driving block constitutes a first driving surface, the left side of the lower end of the vertical rod of the first push rod in the horizontal direction and the right side of the lower end of the vertical rod of the second push rod in the horizontal direction are respectively provided with a notch matched with one side of the upper end of the first driving block and downward in direction, and the end surface of the notch downward constitutes a driven surface, and when the two first nuts move upward alternately, the first push rod and the second push rod are respectively pushed by the first driving surface of the first driving block of each first driving block to the driven surface of the lower end of the vertical rod of the first push rod and the second push rod, so that the first push rod and the second push rod move upward alternately.

[0021] The pulling device of the weft knitting machine further comprises a first switching swing rod and a third switching swing rod, and the nut comprises one first nut; the first nut is driven to move upward and downward to drive the first switching swing rod and the third switching swing rod to swing, respectively, the first switching swing rod and the third switching swing rod driven to swing push the first push rod and the second push rod to move upward, respectively, so that the first push rod and the second push rod move upward alternately.

[0022] The first nut is provided with first driving blocks on both lateral sides, the top end face and the bottom end face of the two first driving blocks respectively form first driving face and fourth driving face; the first switching swing rod and the third switching swing rod are placed on the inner side of the push rod in the inner cavity of the fixed seat, the first switching swing rod includes coaxially rotating first long arm rod and first short arm rod, the third switching swing rod includes driving gear short rod and driven gear long rod which are in meshing engagement; the vertical rod of the first push rod and the second push rod is respectively provided with sliding groove; the first short arm rod and the driving gear short rod respectively touch the first driving face and the fourth driving face of the first nut, the first long arm rod and the driven gear long rod are respectively 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 rod is pushed upward by the first driving face, the driving gear short rod is rotated and the driven gear long rod in meshing engagement is swung upward, the first switching swing rod and the driven gear long rod which are swung upward respectively and alternately push the first push rod and the second push rod upward.

[0023] The nut includes two first nuts and one third nut, the two first nuts are used to alternately drive the first push rod and the second push rod upward in turn, and the third nut is used to drive the third push rod upward.

[0024] The first nut is provided with first driving blocks on both lateral sides, the top end face and the fourth driving face of the two first driving blocks respectively form first driving face and fourth driving face; the first switching swing rod and the third switching swing rod are placed on the inner side of the push rod in the inner cavity of the fixed seat, the first switching swing rod includes coaxially rotating first long arm rod and first short arm rod, the third switching swing rod includes driving gear short rod and driven gear long rod which are in meshing engagement; the vertical rod of the first push rod and the second push rod is respectively provided with sliding groove; the first short arm rod and the driving gear short rod respectively touch the first driving face and the fourth driving face of the first nut, the first long arm rod and the driven gear long rod are respectively 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 rod is pushed upward by the first driving face, the driving gear short rod is rotated and the driven gear long rod in meshing engagement is swung upward, the first switching swing rod and the driven gear long rod which are swung upward respectively and alternately push the first push rod and the second push rod upward.

[0025] The alternating pulling transverse knitting machine pulling device further includes two first switching swing rods and at least one second switching swing rod, the nut includes two second nuts, the two second nuts are used to alternately drive one first switching swing rod to swing upward in turn, the two first switching swing rods which are alternately swung upward respectively push the first push rod and the second push rod 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 is swung upward pushes the third push rod upward.

[0026] 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 first driving surface continues to move upward, the first short arm lever abuts against 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 no longer abuts against the end of the first short arm lever.

[0027] The pulling device for the transverse knitting machine further comprises a first switching swing lever and a third switching swing lever, and the nut comprises a first nut and a third nut; the first nut is driven to move upward and downward to drive the first switching swing lever and the third switching swing lever to swing respectively, the swinging first switching swing lever and the third switching swing lever respectively push the first push rod and the second push rod to move upward, the first push rod and the second push rod are alternately moved upward, and the third nut is used to drive the third push rod to move upward.

[0028] The first nut is provided with first driving blocks on both sides, and the top and bottom ends of the two first driving blocks form first driving faces and fourth driving faces respectively; the first and third switching swing rods 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 in meshing engagement; the vertical rods of the first and second push rods are provided with sliding grooves; the first short arm and the driving gear short rod are in contact with the first driving faces and the fourth driving faces of the first nut respectively, and 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 and second push rods respectively; the first short arm is pushed upward by the first driving faces, so that the first switching swing rod swings upward, the driving gear short rod is rotated by the fourth driving faces, and the driven gear long rod in meshing engagement is swung upward, the first switching swing rod and the driven gear long rod swung upward push the first and second push rods upward respectively and alternately; the third nut is provided with a third driving block extending outward from the fixed plate, the top end of the third driving block forms a third driving face, the third push rod is provided with a triggering end below, the fixed plate is provided with a clearance slot hole corresponding to the position of the third driving block, the third driving block extends outward from the outer side of the fixed plate through the clearance slot hole and is attached to the triggering end below, and one third nut drives the supported pulling needle comb to move upward by pushing the triggering end of the third push rod through the third driving face on the top end of the third driving block.

[0029] The alternating pulling device for the flat knitting machine further comprises first and third switching swing rods, and the nut comprises a fourth nut, which is used to drive the swinging of the first switching swing rod and the upward movement of the third push rod upwardly, and to drive the swinging of the third switching swing rod downwardly, the swinging first and third switching swing rods push the first and second push rods upward respectively and alternately in sequence.

[0030] The first and third switch swing rods are arranged on the inner side of the fixed plate and correspond to the vertical rods of the first and second push rods respectively, the first switch swing rod comprises a first long arm rod and a first short arm rod rotating on the same axis, and the third switch 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 four nuts in the transverse direction and the outer side of the fixed plate respectively, 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; 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 upward movement of the first driving surface to swing upward, and when the end 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 fourth nut, and when the first driving surface continues to move upward, the first short arm rod abuts against the abutting surface, 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 no longer abuts against the end of the first short arm rod; the driving gear short rod is rotated by the downward movement of the fourth driving surface and the tooth-meshed driven gear long rod swings upward, the first switch swing rod and the driven gear long rod which swings upward 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 driving surface.

[0031] The guide structure comprises a shaft pin and a guide groove in relative movement, the shaft pin is arranged on the fixed seat, and the guide groove is arranged on the rake handle and the needle comb rod, the guide groove comprises a first guide groove arranged on the rake handle and a second guide groove arranged on the needle comb rod; the first guide groove comprises a first inclined straight groove and a first straight groove arranged in the up-down direction, and the first inclined straight groove is composed of a straight groove segment and an inclined groove segment connected to one end of the straight groove segment; the second guide groove comprises a second inclined straight groove and a second straight groove arranged in the up-down direction, and the second inclined straight groove is composed of a straight groove segment and an inclined groove segment connected to the upper and lower ends on the same side of the straight groove segment.

[0032] The pulling device for the transverse knitting machine with the alternate pulling further comprises a tension spring and a tension spring adjusting plate, the tension spring is provided with hooks at both ends, the outer side of the fixed plate is provided with a plurality of hooks holes arranged side by side and matched with the positions of the pulling comb, the tension spring adjusting plate is arranged on the outer side of the fixed plate and can be adjusted up and down, the tension spring adjusting plate is provided with a plurality of hooks holes arranged side by side and matched with the positions of the pulling rake, the pulling rake and the pulling comb are both provided with the hooks holes, the hooks holes of each pulling comb and the hooks holes of each pulling rake are connected by the hooks of the tension spring, and the pulling rake and the pulling comb are pulled down by the tension of the tension spring.

[0033] The pulling device for the transverse knitting machine with the alternate pulling further comprises a push rod position adjusting unit, the push rod position adjusting unit is arranged on the horizontal two sides below the fixed seat and comprises an adjusting rod for receiving the falling position of the push rod, a nut seat arranged at one end of the adjusting rod and an adjusting screw rod screwed with the nut seat, the horizontal two sides below the fixed seat are respectively provided with a placing groove for placing the adjusting rod, one side of the horizontal below the placing groove is provided with a nut seat sliding groove communicated with the placing groove, the lower side of the nut seat sliding groove is provided with a screw rod groove communicated 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 the falling position of the push rod is adjusted by rotating the adjusting screw rod to move the adjusting rod up and down.

[0034] The pulling combs are arranged at the horizontal interval positions of the pulling rakes, which are arranged between every two adjacent pulling rakes or every two adjacent pulling rake units formed by a plurality of horizontally arranged pulling rakes

[0035] A transverse knitting machine adopting the pulling device for the transverse knitting machine with the alternate pulling.

[0036] The present application has the following beneficial effects:

[0037] 1. The pulling rakes are divided into two groups, a group of first pulling rakes and a group of second pulling rakes are alternately arranged at the horizontal interval positions, and the first pulling rakes and the second pulling rakes are alternately pushed up by the pushers, so that the local fabric without pulling force does not appear, and the pulling width can be made to be within the narrow range limited by physics, and the pulling requirements of different knitting structures can be met.

[0038] 2. And the present invention provides a drawing needle comb, the highest position of which can be close to the lower part of the cylinder, and can adapt to the drawing of the base knitting, so that only a few rows of knitting (commonly known as waste yarn) are needed in the base knitting. The drawing needle comb can hook the waste yarn first, and then the drawing comb takes over the drawing of the knitting when the drawing needle comb draws the knitting to the position of the drawing comb. In this way, the length of the waste yarn knitting required before the waste yarn is drawn to the position of the drawing comb can be greatly reduced, saving the amount of waste yarn and the time spent on waste yarn knitting. And it can completely avoid the needle collision and machine stoppage accidents caused by the occasional misoperation of the base needle comb when it is stretched out of the cylinder to complete the yarn hooking action after the first row of base knitting is completed in the machine head. At the same time, the complex base needle comb device and the opening and closing device of the drawing comb are saved, which greatly simplifies the complex drawing system and saves the manufacturing cost.

[0039] 3. The present invention also provides a push rod position adjusting unit to adjust the stroke of the push rod to prevent the problem of large eye caused by the overlarge stroke of the edge of the loop or the problem of insufficient drawing force caused by the over small stroke.

[0040] 4. The drawing needle comb and the drawing comb can share one driving member to be driven by the switching lever provided by the present invention, which can save the number of motors and thus save the manufacturing cost of the whole machine. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 The position structure diagram below the needle plate of the flat knitting machine for the drawing mechanism of the first embodiment of the present invention;

[0042] Figure 2 The structure diagram of the drawing mechanism of the first embodiment, wherein: a is the front view (part of the fixed panel is omitted), and b is the side view;

[0043] Figure 3 The three-dimensional structure diagram of the drawing comb;

[0044] Figure 4 The position diagram of the drawing comb, push rod and driving member in the fixed seat in the drawing mechanism of the first embodiment;

[0045] Figure 5 The driving structure diagram of the drawing comb in the drawing mechanism shown in the figure; Figure 4

[0046] Figure 6

[0047] Figure 7 Figure 8 The structure diagram of the drawing mechanism of the second embodiment;

[0048] Figure 9 ​​​This is a schematic diagram showing the positions of the traction rake, push rod, and drive component in the traction mechanism of Embodiment 2;

[0049] Figure 10 for Figure 9 A schematic diagram of the first nut in the pulling mechanism shown;

[0050] Figure 11 for Figure 9 The diagram shows the first switching lever in the traction mechanism; where: Figure a is a 3D view; Figure b is a 2D view;

[0051] Figure 12 for Figure 9 A schematic diagram of the third switching lever in the traction mechanism shown;

[0052] Figure 13 This is a schematic diagram of the position structure below the needle plate of the horizontal knitting machine for the tensioning mechanism in Embodiment 3 of the present invention;

[0053] Figure 14 for Figure 13 A magnified view of point C in the schematic diagram of the location structure shown;

[0054] Figure 15 This is a schematic diagram of the traction mechanism in Embodiment 3, where: Figure a is the main view (with the fixed panel omitted), and Figure b is the side view;

[0055] Figure 16 This is a schematic diagram of the three-dimensional structure of the traction comb;

[0056] Figure 17 This is a schematic diagram showing the positions of the fixed plate, push rod, and switching swing arm in the traction mechanism of Embodiment 3;

[0057] Figure 18 This is a schematic diagram of the transmission structure of the pulling rake, the pulling comb push rod, and the driving component in the pulling mechanism of Embodiment 3.

[0058] Figure 19 This is a schematic diagram of the fixed plate structure in the traction mechanism of Embodiment 3;

[0059] Figure 20 This is a schematic diagram of the swing component structure in the traction mechanism of Embodiment 3;

[0060] Figure 21 This is a schematic diagram of the third push rod in the traction mechanism of Embodiment 3;

[0061] Figure 22 The diagram shows the structure of the fixed seat in the traction mechanism of Embodiment 3, where: Figure a is a front view of the fixed seat and Figure b is a side view of the fixed seat;

[0062] Figure 23 This is a schematic diagram showing the positions of the adjusting rod and the push rod in the traction mechanism of Embodiment 3;

[0063] Figure 24 Position diagram of the first pulling rake and the second pulling rake in the pulling mechanism of Example Three; wherein, Fig. a is a diagram of the first pulling rake in the highest position and the second pulling rake in the lowest position, Fig. b is a diagram of the first pulling rake in the lowest position and the second pulling rake in the highest position;

[0064] Figure 25 Position diagram of the pulling needle comb in the pulling mechanism of Example Three; wherein, Fig. a is a diagram of the pulling needle comb in the highest position, Fig. b is a diagram of the pulling needle comb in the extended state, and Fig. c is a diagram of the pulling needle comb in the lowest position;

[0065] Figure 26 Diagram of the fixed panel in the pulling mechanism of Example Three;

[0066] Figure 27 Diagram of the second nut in the pulling mechanism of Example Three; wherein, Fig. a is a right view, Fig. b is a front view, and Fig. c is a left view;

[0067] Figure 28 Diagram of the second switching swing rod in the pulling mechanism of Example Three; wherein, Fig. a is a three-dimensional view, and Fig. b is a plan view;

[0068] Figure 29 Position diagram of the pulling rake and the pulling needle comb when the pulling mechanism of Example Three is used for bottom knitting; wherein, Fig. a is a diagram of the pulling rake and the pulling needle comb both in the highest position, and Fig. b is a diagram of the pulling needle comb in the lowest position and the pulling rake in the highest position;

[0069] Figure 30 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 Three;

[0070] Figure 31 Diagram of the pulling rake, the pulling needle comb, the push rod and the driving member transmission structure in the pulling mechanism of Example Four;

[0071] Figure 32 Diagram of the pulling rake, the pulling needle comb, the push rod and the driving member transmission structure in the pulling mechanism of Example Five;

[0072] Figure 33 Diagram of the third push rod in the pulling mechanism of Example Five;

[0073] Figure 34 Diagram of the third nut in the pulling mechanism of Example Five;

[0074] Figure 35 Diagram of the fixed panel structure in the pulling mechanism of Example Five;

[0075] Figure 36Figure 6 is a schematic diagram of the transmission structure of the pulling rake, the pulling needle comb, the push rod and the driving member in the pulling mechanism of Example 6;

[0076] Figure 37 Figure 7 is a schematic diagram of the transmission structure of the pulling rake, the pulling needle comb, the push rod and the driving member in the pulling mechanism of Example 7;

[0077] Figure 38 Figure 8 is a schematic diagram of the fourth nut in the pulling mechanism of Example 7; wherein, a is a right view, b is a front view, and c is a left view;

[0078] In the 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 straight and inclined slot, 412-first straight slot, 42-second guide slot, 421-second straight and inclined 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 member, 72-tension spring, 701-tension spring hole, 8-fixing plate, 81-clearance slot hole, 82-guiding sliding slot, 91-fixing base, 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 member 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 base, 903-adjusting screw rod. DETAILED DESCRIPTION

[0079] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0080] The following directional terms are defined as follows: 1) "inner" and "outer" are defined based on the inner cavity of the fixed seat; 2) the transverse direction is consistent with the transverse direction of the flat knitting machine; 3) the front and back are consistent with the front and back of the front and back needle beds of the flat knitting machine.

[0081] Example 1

[0082] The pulling device for the horizontal knitting machine in this embodiment, such as Figure 1 As shown, it includes several tensioning mechanisms B respectively arranged symmetrically on the front and rear sides below the needle plate A of the horizontal knitting machine, combined with Figure 2 As shown, the traction mechanism B includes a fixed base 91, a fixed panel 92 covering the outside of the fixed base 91, a traction rake 1 that slides up and down and is rotatable within the fixed base 91 and guided by a guide structure, a drive member that moves up and down within the fixed base 91, and a push member that moves up and down within the fixed base 91 as the drive member operates. Figure 3 As shown, the pulling rake 1 is divided into a first pulling rake 11 and a second pulling rake 12. The first pulling rake 11 and the second pulling rake 12 have the same structure, both including a rake handle 102 and a rake head 103 disposed on the upper end of the rake handle 102. The rake head 103 is provided with rotatable rake teeth 101 (for details, please refer to the published patent 202011120222.9 A pulling rake for a horizontal knitting machine pulling device).

[0083] The guiding structure of the present invention is composed of a shaft pin and a guide groove that move relative to each other. In this embodiment, the shaft pin 43 is set on the fixed seat 91. The shaft pin 43 includes an upper shaft pin and a lower shaft pin that pass through all the rake grooves and are arranged in parallel vertically. The guide groove is a first guide groove 41 set on the rake handle 12. The first guide groove 41 includes a first inclined straight groove 411 and a first straight groove 412 arranged vertically. The first inclined straight groove 411 is composed of a straight groove section and a lower inclined groove section that is connected to the lower end of the straight groove section and is inclined downward and outward towards the fixed seat. Furthermore, the aforementioned fixed panel 92, which covers the outside of the fixed base 91, is provided with several rake groove holes that allow the rake teeth 11 on the pulling rake to protrude. When the upper shaft pin moves relative to the lower inclined groove section to the straight groove section, the pulling rake rotates inward around the lower shaft pin, presenting a retracted state that retracts inward in the lateral direction of the fixed panel 92, i.e., a non-pulling state. When the upper shaft pin moves relative to the lower inclined groove section from the straight groove section, the pulling rake rotates outward around the lower shaft pin, presenting an extended state that extends outward in the lateral direction of the fixed panel 92.

[0084] Combination Figure 4 and Figure 5As shown, the pushing member in the embodiment includes a first pushing rod 31 and a second pushing rod 32, the first pushing rod 31 and the first pushing rod 32 are slidably arranged in the fixed seat, and a set of first pulling harrows 11 and a set of second pulling harrows 12 are respectively supported on the first pushing rod 31 and the first pushing rod 32, and the set of first pulling harrows 11 and the set of second pulling harrows 12 are alternately arranged in the lateral direction and are spaced apart from each other. A fixed panel 92 is covered on the outside of the fixed seat 91, and a plurality of harrow slot holes are provided on the fixed panel 92 to expose the harrow teeth 11 on the pulling harrows. The driving member of the embodiment is two first nuts 51 which are movable up and down, and at least one side of the first nut 51 in the lateral direction is provided with a first driving block 511 for driving the pushing rod to move upward, and the upper end surface of the first driving block 501 forms a first driving surface 5011. In combination Figure 6 and Figure 7 As shown, the first pushing rod 31 and the second pushing rod 32 each include a horizontal rod and a vertical rod having a plate-shaped body, the horizontal rod 301 is connected perpendicularly to the upper end of the vertical rod 302, and the upper end of the horizontal rod is provided with a plurality of rectangular teeth 3011 arranged in parallel in the lateral direction for supporting the lower ends of the harrow handles of the pulling harrows; the first pushing rod 31 and the second pushing rod 32 are slidably arranged in the inner cavity of the fixed seat with the opposite surfaces of the first pushing rod 31 and the second pushing rod 32 abutting against each other; the left side of the vertical rod of the first pushing rod 31 in the lateral direction and the right side of the vertical rod of the second pushing rod 32 in the lateral direction are respectively provided with a notch which is adapted to one side of the upper end of the first driving block and is downward in direction, and the end surface of the notch which faces downward forms a driven surface 3025. Two first nuts 51 described above are respectively screw-connected to a screw rod 56 provided on the motor shaft of the motor 55, and when the two first nuts 51 are alternately screw-pushed upward by the screw rod on the rotating motor shaft, the first driving surface on the upper end of the first driving block 511 of each first nut 51 pushes against the first driven part of the first pushing rod and the second pushing rod, respectively, to push the corresponding pushing rod to move upward alternately, and the first pushing rod 31 and the second pushing rod 32 which move upward alternately push a set of first pulling harrows 11 and a set of second pulling harrows 12 to move upward alternately until the highest position, and when moving upward to the highest position, the first pushing rod 31 and the second pushing rod 32 are guided by the self-guiding structure to be in a retracted state of retracting inward in the lateral direction of the fixed seat, and the two nuts 51 move downward alternately, and the first pushing rod 31 and the set of first pulling harrows 11 thereon and the second pushing rod 32 and the set of second pulling harrows 12 thereon move downward alternately under the action of gravity, and are guided by the guiding structure to be in an extended state of extending outward in the lateral direction of the fixed seat at the beginning of the downward movement, so that the harrow teeth expose the harrow slot holes to hook the knitted fabric and pull the knitted fabric downward in the downward movement stroke, and the first pulling harrow and the second pulling harrow perform repeated pulling actions of alternating upward movement and alternating downward movement until the knitting is completed.

[0085] Embodiment two

[0086] The pulling device of the flat knitting machine in the embodiment is basically the same as that in embodiment one, and the difference is that Figure 8As shown, the first pulling rake 11 and the second pulling rake 12 are the same as those in the above-mentioned embodiment 1, the first pulling rake 11 and the second pulling rake 12 are guided by the same guide structure, and the first pulling rake 11 and the second pulling rake 12 are respectively supported on the first push rod 31 and the second push rod 32, and the first pulling rake 11 on the first push rod 31 and the second pulling rake 12 on the second push rod 32 are arranged alternately.

[0087] But different from the above-mentioned embodiment 1, the first push rod 31 and the second push rod 32 are driven by a common driving member, and the driving member in this embodiment is also a first nut, as shown in Figure 9 As shown, the first push rod 31 and the second push rod 32 in this embodiment are driven by a common driving member, and the driving member in this embodiment is also a first nut, as shown in Figure 10 As shown, the first nut 51 drives the first push rod 31 and the second push rod 32 alternately by the swing of the first switching swing rod 61 and the third switching swing rod 63, and the transverse two sides of the first nut 51 are respectively provided with first driving blocks 501, and the top end face and the bottom end face of the two first driving blocks 501 respectively form the first driving face 5011 and the fourth driving face 5013; 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 As shown, the first switching swing rod comprises a first long arm rod and a first short arm rod coaxially rotating, and the third switching swing rod comprises a driving gear short rod and a driven gear long rod meshing with each other, and 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 respectively provided with a sliding groove 3022, and Figure 5 As shown, the sliding groove 3022 is arranged at the lower part of the vertical rod to accept the pushing of the third switching swing rod 63; the first short arm rod and the driving gear short rod can respectively touch the first driving face 5011 and the fourth driving face 5013 of the first nut 51, and the first long arm rod and the driven gear long rod are respectively connected with the sliding groove 3022 on the vertical rod of the first push rod 31 and the second push rod 32; when the first nut 51 moves upward, the first driving face 5011 pushes the first short arm rod to make the first long arm rod swing upward, and when the first nut 51 moves downward, the fourth driving face 5013 pushes the driving gear short rod to rotate and makes the driven gear long rod meshing with each other swing upward, and the upward swinging first switching swing rod and the driven gear long rod alternately push the first push rod 31 and the second push rod 32 to move upward respectively and in turn, so that the first pulling rake 11 and the second pulling rake 12 repeatedly move upward and downward alternately to complete the pulling action.

[0088] Embodiment three

[0089] This embodiment is a further more specific design of the pulling device for the flat knitting machine based on the mechanism of the above-mentioned embodiments.

[0090] The pulling mechanism in this embodiment is as shown in Figure 13 ,Figure 14 and Figure 15 , with the same first pulling rake 11 and second pulling rake 12 as the above-mentioned embodiments, but further comprising a set of pulling needle combs 2, the pushing member further comprising a third pushing rod 33, the set of pulling needle combs 2 being supported on the third pushing rod 33 while being in the transversely spaced positions of the pulling rake, as shown in Figure 16 , the pulling needle comb 2 comprising a needle comb rod 22 and a pulling hook 21 arranged on the upper end of the needle comb rod 22.

[0091] In the guiding structure of the present embodiment, the shaft pin is arranged on the fixed seat 91, the guiding groove is arranged on the rake handle 12 and the needle comb rod 22, as shown in Figure 3 and Figure 16 , the rake handle 102 is provided with a first guiding groove 41, the first guiding groove 41 comprising a first oblique straight groove 411 and a first straight groove 412 arranged in sequence, the first oblique straight groove 411 being composed of a straight groove segment and a lower oblique groove segment connected to the lower end of the straight groove segment and inclined downward and outward of the fixed seat; the needle comb rod 22 is provided with a second guiding groove 42, the second guiding groove 42 comprising a second oblique straight groove 421 and a second straight groove 422 arranged in sequence, the second oblique straight groove 421 being composed of a straight groove segment and an upper oblique groove segment and a lower oblique groove segment connected to the upper and lower ends of the outer side of the straight groove segment, the upper oblique groove segment being an oblique groove segment inclined upward and outward of the fixed seat, the lower oblique groove segment being an oblique groove segment inclined downward and outward of the fixed seat, the upper oblique groove segment and the lower oblique groove segment being symmetrically arranged with respect to the center line of symmetry of the second oblique straight groove segment 421 in the height direction.

[0092] In combination with Figure 17 and Figure 18 , in the present embodiment, the first pushing rod 31, the second pushing rod 32 and the third pushing rod 33 are driven by two second nuts 52 cooperating with two first switching swing rods 61 and two second switching swing rods 62, the two second nuts alternately drive the first pushing rod 31 and the second pushing rod 32 by respectively and alternately driving the swinging of the two first switching swing rods 61, and the two second nuts simultaneously drive the swinging of the two second switching swing rods 62 to drive the third pushing rod 33; the present embodiment is further provided with a tension spring 72 and a swing member 71, and a fixed plate 8 is arranged 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 member 71 and between each pulling needle comb 2 and the fixed plate 8, so that when the pulling rake 1 and the pulling needle comb 2 pull down the knitted fabric, in addition to the gravity suffered when moving downward, the tension spring also provides pulling force downward.

[0093] In combination with Figure 6 and Figure 7In this embodiment, the first push rod 31 and the first push rod 32 have a structure that is basically the same as that in Embodiment 1. That is, both push rods are composed of a horizontal rod 301 and a vertical rod 302 connected vertically to the lower end of the horizontal rod, and are placed in a symmetrical arrangement, respectively on the opposite side of the two second nuts; Figure 21 As shown, 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 inner side of the fixed seat. A touch end 332 is provided at each of the two second switching swing rods 62. The two touch ends 332 are respectively located on the side of the two second nuts facing each other. The two first switching swing rods 61 and the two second switching swing rods 62 are placed on the inner side of the push rod relative to the inner and outer sides of the fixed seat. The two first switching swing rods 61 are respectively located at the positions of the first push rod 31 and the second push rod 32. The two second switching swing rods 62 are placed at the touch end positions of the two third push rods. The switching swing rods are in contact with the second nuts 52 and are movably connected to the corresponding push rods, so that when pushed upward by the second nuts 52, the four switching swing rods swing upward and downward when pushed downward.

[0094] The aforementioned pull rake 1, pull needle comb 2, first push rod 31, first push rod 32, third push rod 33, first switching swing rod, second switching swing rod, second nut 51, tension spring 72, swinging component 71 and fixing plate 8 are all arranged in the inner cavity of the fixing seat 91, and the outer side of the fixing seat 91 is covered by the fixing panel 92.

[0095] like Figure 22 As shown, the inner cavity of the fixed base 91 is provided with several vertically arranged and horizontally parallel rake grooves 911 and needle comb grooves 912. The rake grooves 911 and needle comb grooves 912 are arranged horizontally at intervals to match the pulling rake 1 and the pulling needle comb 2. The rake handle 12 of the pulling rake 1 and the needle comb rod 22 of the pulling needle comb 2 are respectively inserted into the rake grooves 911 and the needle comb grooves 912. The shaft pin in the guide structure of this embodiment is a long shaft pin. The shaft pin hole 915 is provided on the groove side wall of the rake groove 911 and the needle comb groove 912. Two shaft pins arranged vertically and horizontally pass through all the rake grooves 911 and the needle comb grooves 912. They are respectively connected to the first oblique straight groove 411 and the first straight groove 412 on the rake handle inserted in the rake groove 911 and the second oblique straight groove 421 and the second straight groove 422 on the needle comb rod in the needle comb groove. They are positioned on the fixed base 91 through the shaft pin hole 915. When the pins 43 in the first inclined straight groove 411 and the second inclined straight groove 421 move relative to each other from the straight groove section to the lower inclined groove section, the pulling rake and the pulling needle comb swing relative to the pins 43 in the first straight groove 412 and the second straight groove 422 toward the inside of the fixed seat 91, respectively forming the retracted state of the pulling rake 1 and the pulling needle comb 2. Figure 24 The first traction rake 11 in Figure a, the second traction rake 12 in Figure b, and Figure 25The highest (working) position of each of the drawing pin combs 2 in Fig. a; conversely, when the shaft pin 43 in the first inclined straight slot 411 moves to the straight slot section, the shaft pin in the first straight slot 412 and the shaft pin in the second straight slot 422 of the drawing pin comb 2 and the drawing rake 1 are respectively swung to the outside of the fixed seat 91, forming the extended state of the drawing rake 1 and the drawing pin comb 2, as shown in Fig. b. Figure 24 The first drawing rake 12 in Fig. a, the first drawing rake 11 in Fig. b, and Figure 25 The drawing pin comb 2 in Fig. b; when the shaft pin 43 in the second inclined straight slot 421 moves to the straight slot section, the long shaft pin in the second straight slot 422 of the drawing pin comb 2 is swung to the inside of the fixed seat 91, forming the retracted state of the drawing pin comb, as shown in Fig. c. Figure 25 The position of the drawing pin comb 2 in Fig. c, corresponding to the lowest position; conversely, when the shaft pin 43 in the second inclined straight slot 421 moves to the straight slot section from the upper inclined slot section, the shaft pin in the second straight slot 422 of the drawing pin comb 2 is swung to the outside of the fixed seat 91, forming the extended state of the drawing pin comb.

[0096] Continuing to refer to Figure 22 , the middle part of the inner cavity of the fixed seat 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 fixed seat 91 is further provided with a hinged groove, which includes two swing piece hinged grooves 917 located below the two nut grooves 914 and switch lever hinged grooves 916 located on both sides of the swing piece hinged grooves and corresponding to the positions of the two first switch levers and the two second switch levers. The swing piece 71 and the four switch levers are respectively hinged in the swing piece hinged grooves 917 and the switch lever hinged grooves 916, and the fixed plate 8 is arranged in the inner cavity of the fixed seat in a parallel manner with the bottom surface of the middle part of the inner cavity, forming a space 919 between the fixed plate 8 and the bottom surface of the middle part of the inner cavity, which accommodates the first push rod and the second push rod. The horizontal rods of 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 horizontal rods are in close contact with each other, and the vertical rods of the first push rod and the second push rod are respectively arranged in a push rod groove. The outer side of the fixed 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 fixed plate between the fixed plate 92 and the fixed panel 93. The lower part of the inner cavity of the fixed seat 91 is provided with a motor groove 918 communicating 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 is accommodated in the nut groove 914, the nut screw-connected to the motor shaft moves up and down along the nut sliding groove, and the movement stroke of the second nut 52 can be controlled by the motor.

[0097] Again in combination with Figure 15 and Figure 18As shown, the fixed seat of the embodiment is also provided with a push rod position adjusting unit 90 for adjusting the lowest position of the two push rod strokes (i.e. adjusting the push rod stroke), which can be seen from Figure 9 The push rod position adjusting unit 90 is provided on the lateral sides below the fixed seat, and includes an adjusting rod 901 for receiving the downward displacement of the push rod, a nut seat 902 provided at one end of the adjusting rod, and an adjusting screw 903 screwed to the nut seat. The lateral sides below the fixed seat are respectively provided with a placement groove for placing the adjusting rod, a nut seat sliding groove in communication with the placement groove for slidingly connecting the nut seat 902, and a screw groove provided below the sliding groove and in communication with the sliding groove, in which the screw is rotatable but not vertically movable. The adjusting rod 901 of the embodiment is a horizontally arranged rod. Rotating the adjusting screw 903 causes the nut seat to move vertically along the nut seat sliding groove, so that the horizontally arranged adjusting rod moves vertically. When the push rod is displaced downward, its position is adjusted by following the upward or downward movement of the adjusting rod, so that the stroke of the upward and downward movement of the push rod is adjusted.

[0098] The further arrangement of the adjusting unit 90 is to provide a protruding block at the adjusting rod corresponding to the position of the push rod, so as to reduce the upward movement surface of the horizontally arranged adjusting rod when it moves upward, and to minimize the interference of the upward movement of the adjusting rod to other components.

[0099] As shown in Figure 26 The fixed panel 92 is provided with rake groove holes 921 and needle comb groove holes 922 corresponding to the horizontally spaced rake 12 and the pulling needle comb 22, and the rake teeth 122 and the pulling hooks 222 can respectively extend out of the rake groove holes 921 and the needle comb groove holes 922 to pull the knitted fabric.

[0100] As shown in Figure 27 The second nut 51 of the embodiment is respectively provided with a first driving block 501 and a second driving block 502 on the lateral sides of the body, the top end faces of the first driving block 501 and the second driving block 502 respectively form a first driving face 5011 and a second driving face 5021, and the first driving face 5011 is higher than the second driving face 5021. At the same time, the side face of the first driving block 501 perpendicular to the top end face forms an abutting face 5012, which faces the inside of the fixed seat 91.

[0101] The driving blocks on the two sides of the second nut 51 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 28As shown, the first switch swing lever 61 is used to push the first push lever 31 or the second push lever 32, and the structure is the same as that of the second embodiment, including the coaxial first long arm lever 611 and the first short arm lever 612, and the second switch swing lever 62 is used to push the third push lever 33 and includes the coaxial second long arm lever 621 and the second short arm lever 622, the first long arm lever is shorter than the second long arm lever, and the two first switch swing levers 61 and the two second switch swing levers 62 are coaxially arranged in the hinge groove 916 in the inner cavity of the relative fixed seat. One side of the first short arm lever 612 of the first switch swing lever 61 and one side of the second short arm lever 622 of the second switch swing lever are used to respectively receive the driving of the first driving block 511 and the second driving block 512 on the second nut 52, and thus one side of the two short arm levers respectively forms the first driven part 611 and the second driven part 621 that receive the driving of the corresponding driving surface. The first driving surface on the first driving block of the second nut 52 pushes the first switch swing lever 61 to swing through the first driven part 611, and when the first switch swing lever 61 swings to make the first driven part 611 of the first short arm lever disengage from the first driving surface 5011, the end surface 613 of the first short arm lever abuts against the abutting surface 5012 of the first driving block, and when the second nut 52 moves, the abutting surface 5012 of the first driving block slides relative to the end surface 613 of the first short arm lever, and the second nut cannot push the first switch swing lever, and thus the driving of the first switch swing lever is stopped. Figure 29 As shown, in this state, the second nut 52 moves, forming the sliding of the abutting surface 5012 of the first driving block relative to the end surface 613 of the first short arm lever, and the second nut cannot push the first switch swing lever, and thus the driving of the first switch swing lever is stopped. One end of the first long arm lever 611 of the two first switch swing levers 61 is used to push the first push lever and the second push lever, and one end of the second long arm lever 621 of the two second switch swing levers 62 is used to push the two contact ends of the third push lever, and thus one end of the first long arm lever and the second long arm lever respectively forms the first driving end 612 and the second driving end 622. The driving end of the two long arm levers is connected with the sliding groove 3022 of the corresponding push lever, and the connection adopts sliding connection, and for this reason, the side surface of the driving end is arranged in a circular arc shape to reduce the friction of sliding.

[0102] Again, as shown in Figure 6 and Figure 7 As shown, the connection end of the long arm lever of the first switch swing lever 61 and the first push lever 31 and the second push lever 32 is arranged on the vertical rod 302 of the push lever, and thus the vertical rod of the two push levers is respectively provided with the sliding groove 3022, and the first driving end 612 of the two first switch swing levers is respectively arranged in the sliding groove 3022 of the first push lever and the sliding groove 3022 of the second push lever, and because the corresponding second long arm lever of the second switch swing lever 62 is longer than the corresponding first long arm lever of the first switch swing lever 61, the swing amplitude is large, and the sliding length is also increased, and thus the moving stroke of the pulling comb 2 is greater than the moving stroke of the pulling harrow 1.

[0103] And, the thickness of the horizontal rod 301 of the first push rod 31 and the second push rod 32 of the embodiment is 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 matching the thickness of the horizontal rod 301, the side 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 sides 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 inner side of the horizontal rod of the second push rod 32, and the two horizontal rods will not interfere with each other when driving the first pulling rake 11 and the second pulling rake 12 arranged at intervals to move up and down, and the groove 3021 provides the possibility for the horizontal rods of the two push rods to move up and down relative to each other in a space with a width of only one vertical rod thickness.

[0104] The embodiment further provides at least two sliding protrusions 3023 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 matches the width of the sliding protrusion, 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, reducing the guide surface and thus reducing the sliding friction.

[0105] The both ends of the tension spring 72 of the embodiment are provided with hooks, combined with Figure 3 and Figure 16 , the pulling rake and the pulling needle comb are provided with a hook hole 701 for hooking the hook of the tension spring, each pulling rake 1 and each pulling needle comb 2 arranged above the inner cavity of the fixed seat are respectively hooked by the hook hole to receive the hook of one end of the corresponding tension spring; the hooks of the other end of the tension spring respectively hooked to the pulling rake 1 and the pulling needle comb 2 are hooked to the swing member 71 and the fixed plate 8.

[0106] As Figure 20As shown, the swing member 71 includes two hinged parts 711 provided with hinged holes and a connecting rod 712 connected to the swing ends of the two hinged parts and arranged transversely, the connecting rod is provided with a plurality of hook holes 701 arranged transversely in parallel, the swing member is hinged in the swing member hinged groove 917 of the fixed seat 91 through the hinged holes of the hinged parts, and the other end of the hooking spring hooked on each pulling rake 1 is hooked on the hook hole 701 at the corresponding position of the connecting rod. Since the two swing member hinged grooves 917 are arranged at positions below the two nut grooves 914, and a space for the threaded rod to pass through is arranged in the middle of the hinged part, when the nut is lowered to the corresponding position below the hinged part, the hinged part can be pushed, thereby controlling the angle of the swing member 71, controlling the pulling force of the corresponding hooking spring 72 of the pulling rake, and controlling the pulling force of the pulling rake. Since the first pulling rake 11 and the second pulling rake 12 are alternately pulled by the two second nuts in the embodiment, the two nuts can be controlled to always have one nut in the lower position to resist the swing member 71, so that the swing member 71 maintains a certain angle, and the angle of the swing member 71 can be adjusted by controlling the lowest position of the second nut, so that the pulling force of the pulling rake can be adjusted during the weaving process without stopping to adjust. When the second nut 52 is lowered to the bottom of the push rod to resist the adjusting rod 93 of the position adjusting unit, the push rod reaches the maximum position, and the second nut can continue to be lowered to push the swing member 71, so that the pulling force of the pulling rake exerted by the hooking spring reaches the set value.

[0107] As shown in Figure 19 , the lower end of the fixed plate 8 is provided with a plurality of hooking spring holes 701 arranged in parallel, and the other end of the hooking spring hooked on each pulling needle comb 2 is hooked on the hook hole 701 at the corresponding position of the connecting rod, the fixed plate 8 is provided with a displacement slot hole 81 at the position corresponding to the second long arm rod of the second switching swing rod, so that the second long arm rod can extend from the inside to the outside of the fixed plate to push the third push rod 33, and the fixed plate 8 is provided with a guide sliding groove 82 on the side outside the fixed seat 91 for sliding connection and guide of the sliding block 331, and the third push rod 33 is arranged outside the fixed plate 8 and slides up and down.

[0108] Before starting the bottom weaving, at least one group of pulling rakes 1 and pulling needle combs 2 need to be pushed to the highest position, as shown in Figure 29 , the second nut 52 is raised by the motor 32, and since the first driving surface 5011 is higher than the second driving surface 5021, the first driving surface 5011 first pushes the upward swing of the first switching swing rod 61, the first driven part 611 of the upward long arm rod drives the first push rod 31 and the second push rod 32 to move upward, and the first push rod 31 and the second push rod 32 push the first pulling rake 11 and the second pulling rake 12 to move upward until they are pushed to the highest position, as shown in 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 lever 62 to swing upward, the second driven part 621 of the long arm lever pushes the third push lever 33 to move upward, the third push lever 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 lever 61 to swing upward, the first driven part 611 on the short arm lever is driven upward by the first driving surface 5011 to swing, at the same time, the first driven part 611 (i.e. one side of the first short arm lever) slides relative to the first driving surface 5011, 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 lever slides out of the first driving surface 5011, as the driving surface 5111 continues to move upward, the end surface 613 of the first short arm lever is opposite to (abuts against) the abutting surface below the driving surface 5111, 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 lever, the abutting surface 5012 limits the swing of the first switching swing lever 61, and the first pulling rake 1 is maintained at the highest position.

[0109] When starting to weave, 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 first driving block 501 is driven to move downward by the first nut 51, and the second driving block 502 is driven to move upward by the second nut 52. At this time, the abutting surface 5012 of the first driving block 501 abuts against the end surface 613 of the first short arm of the first switching swing rod 61, and the first driving block 501 cannot drive the first switching swing rod 61 to swing downward. At the same time, the second driving surface 5021 of the second driving block 502 abuts against the end surface 623 of the second short arm of the second switching swing rod 62, and the second driving block 502 can drive the second switching swing rod 62 to swing downward. The pulling comb 2 is driven to move downward by the second switching swing rod 62 under the action of the weight and the tension spring 72, and the pulling hook 21 pulls the knitted fabric and moves downward. In this process, the first driving block 511 moves downward with the first nut 51, and the abutting surface 5012 of the first driving block 511 slides off the end surface 613 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 first 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 is completed. The subsequent control of the highest position of the two nuts moving upward makes the nuts no longer drive the pulling comb. The second nut 52 corresponding to the first push rod 31 continues to move downward, and 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 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, and drives the second pulling rake 12 to move upward. Then the second nut 52 corresponding to the second push rod 32 moves downward, and the second pulling rake 12 moves downward to pull the knitted fabric. The second nut 52 corresponding to the second push rod 32 abuts against the swing member 71. The two second nuts 52 controlled by the motor 55 repeatedly move upward and downward in the above-mentioned manner, and the first pulling rake and the second pulling rake move upward and downward alternately, and alternately pull the knitted fabric. The stroke of the two second nuts 52 is controlled by the motor 52, so that the two second nuts 52 only repeatedly drive the first switching swing rod 61 and do not drive the second switching swing rod 62. The first pulling rake and the second pulling rake repeatedly move upward and downward alternately 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 knitted fabric pulled by the tines 11, 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.

[0110] Embodiment Four

[0111] The pulling device of the flat knitting machine of the embodiment is basically the same as that of the third embodiment, except that:

[0112] As shown in Figure 31 , only one second switching swing rod 62 is arranged in the embodiment, which is arranged on the side of the second driving block of the second nut 52. The bottom of the third push rod 33 is only provided with a touch end 332 at the second driving end 622 corresponding to the second long arm end of the second switching swing rod. The third push rod 33 is driven by the second switching swing rod 62.

[0113] In the embodiment, each pulling needle comb 2 is arranged between every two adjacent pulling rake units. Two transversely arranged and adjacent pulling rakes 1 form a pulling rake unit. In the embodiment, more than two adjacent pulling rakes 1 can also form a pulling rake unit.

[0114] Embodiment five

[0115] The pulling device of the flat knitting machine of the embodiment is basically the same as that of the third embodiment, except that:

[0116] As shown in Figure 32 , the nut of the embodiment includes two first nuts 51 and one third nut 53. The two first nuts 51 are used to drive the first push rod 31 and the second push rod 32 to move upward alternately. The third nut 53 is used to drive the third push rod 33 to move upward.

[0117] The structures of the two first nuts 51 and the corresponding first push rod 31 and the second push rod 32 are the same as those of the first embodiment. As shown in Figure 34 , the third nut 53 is provided with a third driving block 5033 extending outward from the fixed plate. The top end surface of the third driving block 503 forms 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. The two touch ends 332 are arranged on the two sides of the guide sliding block 331. As shown in Figure 35 , the fixed plate 8 is provided with a clearance groove 81 corresponding to the position of the third driving block 503. The third driving block 503 extends outward from the outer side of the fixed plate and is attached to the lower side of the touch end 332. The third nut 53 pushes the touch end 332 of the third push rod through the third driving surface of 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 grooves. The third nut 53 is arranged in the middle nut groove, and the two first nuts 51 are arranged in the two side nut grooves.

[0118] During the knitting of the base, the driving process of the first pulling rake, the second pulling rake, and the pulling needle comb is the same as that of the third embodiment. Only two first nuts and one third nut are used to drive them respectively.

[0119] Embodiment six

[0120] The pulling device for the flat knitting machine of the present embodiment is basically the same as that of Embodiment Three, except that, as shown in Figure 36 the nut includes a first nut 51 and a third nut 53, the switching swing rod includes a first switching swing rod 61 and a third switching swing rod 63, the first nut 51 drives the first switching swing rod 61 and the third switching swing rod 63 to swing respectively by moving upward and downward, the swinging first switching swing rod 61 and the third switching swing rod 63 respectively 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, and the third nut 53 is used to drive the third push rod 33 to move upward alone.

[0121] The first nut 51 and the corresponding first switching swing rod 61 and third switching swing rod 63 are the same as those of Embodiment Two, the third nut 53 and the corresponding third push rod 33 are the same as those of Embodiment Five, the fixed seat 91 is horizontally centrally symmetrical and provided with two nut grooves, the first nut 51 and the third nut 53 are arranged in the two nut grooves, and the corresponding first push rod 31 and second push rod 32 are no longer symmetrically arranged, but the two vertical rods are inclined to the left side to be driven by the first nut 51, and the guide sliding block 331 of the third push rod 33 is no longer arranged at the middle position, but is inclined to the right side to be driven by the third nut 53.

[0122] Embodiment Seven

[0123] The pulling device for the flat knitting machine of the present embodiment is basically the same as that of Embodiment Three, except that, as shown in Figure 37 the nut includes a first nut 51 and a third nut 53, the switching swing rod includes a first switching swing rod 61 and a third switching swing rod 63, the first nut 51 drives the first switching swing rod 61 and the third switching swing rod 63 to swing respectively by moving upward and downward, the swinging first switching swing rod 61 and the third switching swing rod 63 respectively 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, and the third nut 53 is used to drive the third push rod 33 to move upward alone.

[0124] The first switching swing rod 61 is the same as that of Embodiment Three, and the third switching swing rod 63 is the same as that of Embodiment Two, as shown in Figure 38 the fourth nut 54 is provided with a first driving block 501 on each side in the horizontal direction, and a third driving block 503 is arranged opposite to the outer side of the fixed plate, the top end face and the bottom end face of the two first driving blocks 501 respectively form a first driving face 5011 and a fourth driving face 5013, the top end face of the third driving block 503 forms a third driving face 5031, and the height of the first driving face 5011 is higher than that of the third driving face 5031; at the same time, the side face of the first driving block 501 perpendicular to the top end face forms an abutting face 5012, which faces the inner side of the fixed seat 91.

[0125] The first push rod 31 and the second push rod 32 have the same structure as that of the second embodiment, and the vertical rods are provided with sliding grooves 3022, and the difference is that the positions of the vertical rods are adjusted according to the positions of the corresponding fourth nuts and the first switching swing rods, and the third push rod 53 has the same structure as that of the third embodiment.

[0126] The first short arm rod of the first switching swing rod 61 and the driving gear short rod of the third switching swing rod 63 can touch the first driving surface 5011 and the fourth driving surface 5013 of the fourth nut 54 respectively, and the first long arm rod and the driven gear long rod are slidably connected with the sliding grooves on the vertical rods of the first push rod 31 and the second push rod 32 respectively; when the fourth nut 54 moves upward, the first switching swing rod 61 is swung upward by the first driving surface pushing the first short arm rod, and the first switching swing rod 61 pushes the first pulling rake 11 to move upward, when the first driven part of the first short arm rod is separated from the first driving surface 5011, the end surface 613 of the first short arm rod abuts against the abutting surface 5012 of the first driving block, in this state, the fourth nut 54 moves to form 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 fourth nut 54 cannot push the first switching swing rod, the fourth nut 54 continues to move upward, and the third push rod 33 and the pulling needle comb 2 are pushed upward by the third driving surface 5031; the pulling needle comb 2 moves downward under the action of gravity and the tension spring, when the abutting surface 5012 of the first driving block is separated from the end surface 613 of the first short arm rod, the fourth nut 54 continues to move downward, the first pulling rake 11 moves downward under the action of gravity and the tension spring, and the driving gear short rod is rotated by the fourth driving surface 5013 pushing the driving gear short rod to rotate and the tooth-engaged driven gear long rod swings upward, the driven gear long rod swinging upward pushes the second push rod 32 and the second pulling rake 12 to move upward.

[0127] In the bottom-up weaving process, the driving processes of the first pulling rake, the second pulling rake and the pulling needle comb are the same as those of the third embodiment, and the difference is that the driving is segmented by the fourth nut.

[0128] In the embodiment, only one nut is provided, so that the swinging angle of the swinging part 71 cannot be maintained during the pulling process, and therefore the swinging part is adjusted to a set angle by the nut moving downward before pulling, and then the swinging part 71 is fixed by the limiting structure, so that the swinging part maintains the set angle when the nut moves upward during pulling.

[0129] The technical scheme of the present application is not limited to the above-mentioned embodiments, for example, the driving part in the present application can also be a rack driven by a gear, and therefore all the technical schemes obtained by equivalent replacement fall within the scope of protection of the present application.

Claims

1. A pulling device for a horizontal knitting machine with alternating pulling, 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 that moves up and down, a pushing member that is slidably disposed on the fixed base and moves up and down with the operation of the driving member, 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 have rotatable rake teeth, characterized in that: The pulling rake includes a first pulling rake and a second pulling rake. A set of first pulling rakes and a set of second pulling rakes are arranged alternately in the horizontal direction. The first pulling rake and the second pulling rake are pushed upward by the upward pushing member and move upward alternately. When they move to the highest position, they are guided by their own guide structure to retract inward in the horizontal direction of the fixed seat. The first pulling rake and the second pulling rake move downward with the pushing member. At least under their own weight, they move downward alternately from their respective highest positions and are initially guided by the guide structure to extend outward in the horizontal direction of the fixed seat, so that the rake teeth are exposed in the rake groove holes to hook the woven fabric and pull the woven fabric downward during the downward stroke. The first pulling rake and the second pulling rake repeatedly move upward and downward alternately to perform the pulling action until the weaving is completed.

2. The alternating tensioning device for a horizontal knitting machine according to claim 1, characterized in that: It also includes a set of pull needle combs arranged horizontally side by side, which are pushed upward by the pusher. The pull needle combs are provided with pull hooks and are located at the horizontal interval of the pull rake and are guided by the guide structure. The fixed panel is also provided with needle comb slots. During the initial knitting, the pull needle combs are pushed upward by the pusher and move through the needle comb slots to the highest position near the opening of the tube, which is higher than the highest position of the pull rake. They are then guided by the guide structure to retract inward in the horizontal direction of the fixed panel. The pull needle combs at the highest position move downward with the pusher and at least follow downward under their own weight. At the beginning of the downward movement, they are guided by the guide structure to extend outward in the horizontal direction of the fixed seat, so that the pull hooks are exposed in the needle comb slots to hook the knitted fabric and pull the knitted fabric downward during the downward movement. At the end of the downward movement, the pull needle combs are guided by the guide structure to retract inward in the horizontal direction of the fixed panel and disengage from the knitted fabric. The pull needle combs are no longer pushed upward by the pusher.

3. The alternating tensioning device for a horizontal knitting machine according to claim 2, characterized in that: The pushing component is a push rod, which includes a first push rod, a second push rod, and a third push rod.

4. The alternating tensioning device for a horizontal knitting machine according to claim 3, characterized in that: The first set of first pulling rakes and the second set of second pulling rakes are respectively supported on the first push rod and the second push rod, and the set of pulling needle combs is supported on the third push rod.

5. The alternating tensioning device for a horizontal knitting machine according to claim 4, characterized in that: The first push rod and the second push rod each include a horizontal bar and a vertical bar with plate-shaped bodies. The horizontal bar is vertically connected to the upper end of the vertical bar, and the upper end of the horizontal bar is provided with several rectangular teeth arranged horizontally to support and contact the lower end of the rake handle. The first push rod and the second push rod are slidably disposed in the cavity of the fixed seat with their partially opposing surfaces abutting each other. 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 on the side opposite to the inner side of the fixed seat.

6. The alternating tensioning device for a horizontal knitting machine according to claim 5, characterized in that: The pulling rake includes a rake handle and a rake head disposed on the upper end of the rake handle, with the rake teeth disposed on the rake head; the pulling comb includes a comb rod, with the pulling hook disposed on the upper end of the comb rod.

7. The alternating tensioning device for a horizontal knitting machine according to claim 6, characterized in that: The driving component is a nut that moves up and down along a screw, and the screw is mounted on the motor shaft.

8. The alternating tensioning device for a horizontal knitting machine according to claim 7, characterized in that: The fixed base also includes a fixed plate. Above the inner cavity of the fixed base, there are several rake grooves and several needle comb grooves arranged horizontally side by side for sliding connection of the rake handle and the needle comb rod. The rake grooves and needle comb grooves are arranged horizontally at intervals to match the rake and the needle comb. Below the rake grooves and needle comb grooves, there are two horizontally arranged push rod grooves that guide the up and down movement of the first push rod and the second push rod, respectively. The fixed plate is fixed on the outer side of the push rod groove. The first push rod and the second push rod are slidably placed between the fixed plate and the inner cavity of the fixed base. The fixed plate has a guide sliding groove on the outer side of the fixed base for sliding connection of the guide sliding block. The third push rod is slidably arranged on the outer side of the fixed plate. The motor is located in the inner cavity of the fixed base below the fixed plate, and the nut screwed to the screw on the motor shaft is in a matching position with the push rod being pushed.

9. The alternating tensioning device for a horizontal knitting machine according to claim 8, characterized in that: The nut includes two first nuts, which are used to drive the first push rod and the second push rod to move upward in an alternating manner.

10. The alternating tensioning device for a horizontal knitting machine according to claim 9, characterized in that: The first nut has a first driving block on at least one side in the lateral direction. The top surface of the first driving block forms a first driving surface. The lower end of the vertical rod of the first push rod and the lower end of the vertical rod of the second push rod are respectively provided with notches that are adapted to the upper side of the first driving block and face downward. The downward-facing end face of the notch forms a driven surface. When the two first nuts move upward alternately, they push against the driven surfaces of the lower ends of the vertical rods of the first push rod and the second push rod through the first driving surface of their respective first driving blocks, so that the first push rod and the second push rod move upward alternately.

11. The alternating tensioning device for a horizontal knitting machine according to claim 8, characterized in that: It also includes a first switching lever and a third switching lever, and the nut includes a first nut; the first nut moves upward and downward respectively to drive the first switching lever and the third switching lever to swing, and the swinging first switching lever and the third switching lever push the first push rod and the second push rod to move upward respectively, so that the first push rod and the second push rod move upward alternately.

12. The alternating tensioning device for a horizontal knitting machine according to claim 11, characterized in that: The first nut has first driving blocks on both sides of its lateral side. The top and bottom surfaces of the two first driving blocks form the first driving surface and the fourth driving surface, respectively. The first switching rocker arm and the third switching rocker arm are located on the inner side of the push rod in the cavity of the fixed seat. The first switching rocker arm includes a first long arm and a first short arm that rotate coaxially. The third switching rocker arm includes a short driving gear and a long driven gear that mesh with each other. The vertical rods of the first push rod and the second push rod are provided with sliding grooves. The first short arm and the short driving gear can respectively contact the first driving surface and the fourth driving surface of the first nut. The first long arm and the long driven gear are slidably connected to the sliding grooves on the vertical rods of the first push rod and the second push rod, respectively. The first driving surface moves up to push the first short arm to make the first switching rocker arm swing upward. The fourth driving surface moves down to push the short driving gear to rotate and make the long driven gear that meshes with each other swing upward. The swinging first switching rocker arm and the long driven gear push the first push rod and the second push rod upward, respectively and alternately.

13. The alternating tensioning device for a horizontal knitting machine according to claim 8, characterized in that: The nut includes two first nuts and one third nut. The two first nuts are used to drive the first push rod and the second push rod to move upward in turn, and the third nut is used to drive the third push rod to move upward.

14. The alternating tensioning device for a horizontal knitting machine according to claim 13, characterized in that: The first nut has a first driving block on at least one side in the lateral direction. The top surface of the first driving block forms a first driving surface. The lower end of the vertical rod of the first push rod and the lower end of the vertical rod of the second push rod are respectively provided with notches that are adapted to the upper side of the first driving block and face downward. The downward-facing end face of the notch forms a driven surface. When the two first nuts move upward alternately, they push against the driven surfaces of the lower ends of the vertical rods of the first push rod and the second push rod through the first driving surface at the upper end of their respective first driving blocks, driving the supported first pulling rake and the second pulling rake to move upward alternately. The third nut has a third driving block extending outward from the fixed plate. The top surface of the third driving block forms a third driving surface. The third push rod has a contact end below it. The fixed plate has a clearance slot corresponding to the position of the third driving block. The third driving block extends outward from the outer side of the fixed plate through the clearance slot and fits against the lower part of the contact end. A third nut pushes against the contact end of the third push rod through the third driving surface at the top of the third driving block, driving the supported pulling comb to move upward.

15. The alternating tensioning device for a horizontal knitting machine according to claim 8, characterized in that: It also includes two first switching levers and at least one second switching lever. The nut includes two second nuts, which are used to alternately drive a corresponding first switching lever to swing upward. The two first switching levers swinging upward alternately push a first push rod and a second push rod to move upward respectively. At least one of the two second nuts is also used to drive a second switching lever to swing upward. The swinging second switching lever pushes a third push rod to move upward.

16. The alternating tensioning device for a horizontal knitting machine according to claim 15, characterized in that: The first switching lever includes a first long arm and a first short arm that rotate coaxially. The second switching lever includes a second long arm and a second short arm that rotate coaxially, with the second long arm being longer than the first long arm. A first driving block and a second driving block are respectively provided on both sides of the second nut in the lateral direction. The top surfaces of the first and second driving blocks respectively form a first driving surface and a second driving surface, with the first driving surface higher than the second driving surface. The vertical side below the top surface of the first driving block forms a contact surface. Sliding grooves are provided on the vertical rods of both the first and second push rods. An actuating end is provided below the third push rod. The two first short arms respectively contact the first driving surface corresponding to one of the second nuts, and the two first long arms respectively contact the vertical rods of the first and second push rods. The sliding groove is slidably connected; the second short arm contacts the second driving surface of the third nut, and the second long arm contacts the contact end of the third push rod; the two first driving surfaces alternately move upward to push the corresponding first short arm, causing the corresponding first switching lever to swing upward and move the end of the first short arm relative to the first driving surface. The upwardly swinging first switching lever pushes the first push rod or the second push rod upward through the sliding connection between the first long arm and the first push rod or the second push rod. When the end of the first short arm slides out of the first driving surface, it is disengaged from the push of the second nut, and when the first driving surface continues to move upward, it abuts against the abutting surface. The first push rod or the second push rod remains in the position when it is disengaged from the push of the second nut until the abutting surface moves out and no longer abuts against the end of the first short arm.

17. The alternating tensioning device for a horizontal knitting machine according to claim 8, characterized in that: It also includes a first switching lever and a third switching lever. The nut includes a first nut and a third nut. The first nut moves up and down, respectively, driving the first switching lever and the third switching lever to swing. The swinging first switching lever and the third switching lever push the first push rod and the second push rod to move up, so that the first push rod and the second push rod move up alternately. A third nut is used to drive the third push rod to move up.

18. The alternating tensioning device for a horizontal knitting machine according to claim 17, characterized in that: The first nut has first driving blocks on both sides of its lateral direction. The top and bottom surfaces of the two first driving blocks respectively form the first driving surface and the fourth driving surface. The first switching rocker arm and the third switching rocker arm are located on the inner side of the push rod in the cavity of the fixed seat. The first switching rocker arm includes a first long arm and a first short arm that rotate coaxially. The third switching rocker arm includes a short driving gear and a long driven gear that mesh with each other. The vertical rods of the first push rod and the second push rod are both provided with sliding grooves. The first short arm and the short driving gear can respectively contact the first driving surface and the fourth driving surface of the first nut. The first long arm and the long driven gear are slidably connected to the sliding grooves on the vertical rods of the first push rod and the second push rod. The first driving surface moves upward to push the first... A short arm causes the first switching lever to swing upward, and the fourth driving surface moves downward to push the short rod of the driving gear to rotate and cause the long rod of the driven gear, which meshes with each other, to swing upward. The first switching lever and the long rod of the driven gear, which swing upward, push the first push rod and the second push rod upward respectively and alternately. The third nut is provided with a third driving block extending outward from the fixed plate. The top surface of the third driving block forms the third driving surface. The third push rod is provided with a contact end below it. The fixed plate is provided with a clearance slot corresponding to the position of the third driving block. The third driving block extends outward from the outer side of the fixed plate through the clearance slot and fits against the lower part of the contact end. A third nut pushes the contact end of the third push rod through the third driving surface at the top of the third driving block, driving the supported pull comb to move upward.

19. The alternating tensioning device for a horizontal knitting machine according to claim 8, characterized in that: It also includes a first switching lever and a third switching lever. The nut includes a fourth nut, which is used to drive the first switching lever to swing and the third push rod to move upward, and to drive the third switching lever to swing downward. The swinging first switching lever and the third switching lever push the first push rod and the second push rod to move upward, respectively and alternately.

20. The alternating tensioning device for a horizontal knitting machine according to claim 19, characterized in that: The first and third switching levers are located on one side of the fixed plate and correspond to the positions of the vertical rods of the first and second push rods, respectively. The first switching lever includes a first long arm and a first short arm that rotate coaxially. The third switching lever includes a short rod of a driving gear and a long rod of a driven gear that mesh with each other. Two first driving blocks and one third driving block are respectively provided on both sides of the four nuts in the lateral direction and in the direction relative to the outer side of the fixed plate. The top and bottom surfaces of the two first driving blocks respectively form the first driving surface and the fourth driving surface. The top surface of the third driving block forms the third driving surface. The first driving surface is higher than the third driving surface, and the vertical side below the top surface of the first driving block forms the abutment surface. The vertical rods of the first and second push rods are provided with sliding grooves. The third push rod has a contact end that is pushed by the third driving surface below it. The first short arm... The rod and the short rod of the driving gear can respectively contact the first driving surface and the fourth driving surface of the first nut. The first long rod and the long rod of the driven gear are slidably connected to the sliding grooves on the vertical rod of the first push rod and the vertical rod of the second push rod, respectively. The first driving surface moves up and pushes the first short rod to make the first switching rocker arm swing upward. When the end of the first short rod slides out of the first driving surface, it is disengaged from the push of the fourth nut and abuts against the abutting surface when the first driving surface continues to move upward. The first push rod is kept in the position when it is disengaged from the push of the fourth nut until the abutting surface moves out and no longer abuts against the end of the first short rod. The fourth driving surface moves down and pushes the short rod of the driving gear to rotate and makes the driven gear long rod with meshing teeth swing upward. The first switching rocker arm and the driven gear long rod swing upward and push the first push rod and the second push rod upward, respectively. The third driving surface moves up and pushes the third push rod upward through the third driven surface.

21. The alternating tensioning device for a horizontal knitting machine according to any one of claims 9 to 20, characterized in that: The guiding structure includes a pivot pin and a guide groove that move relative to each other. The pivot pin is mounted on a fixed base, and the guide groove is mounted on the rake handle and the comb rod. The guide groove includes a first guide groove on the rake handle and a second guide groove on the comb rod. The first guide groove includes a first inclined straight groove and a first straight groove arranged vertically. The first inclined straight groove is composed of a straight groove section and an inclined groove section connected to one end of the straight groove section. The second guide groove includes a second inclined straight groove and a second straight groove arranged vertically. The second inclined straight groove is composed of a straight groove section and an inclined groove section connected to the upper and lower ends of the straight groove section on the same side.

22. The alternating tensioning device for a horizontal knitting machine according to claim 21, characterized in that: It also includes a tension spring and a tension spring adjusting plate. The tension spring has hooks at both ends. The outer side of the fixed plate has several hook holes arranged in parallel and adapted to the position of the pull needle comb. The tension spring adjusting plate is adjustable up and down and is arranged on the outer side of the fixed plate. The tension spring adjusting plate has several hook holes arranged in parallel and adapted to the position of the pull rake. The pull rake and the pull needle comb are both provided with hook holes. The hook holes of each pull needle comb and the corresponding hook holes of the fixed plate, as well as the hook holes of each pull rake and the corresponding hook holes of the tension spring adjusting plate, are connected by hooks at both ends of the tension spring to the corresponding hook holes. The pull rake and the pull needle comb also use the tension spring to pull the knitted fabric downward.

23. The alternating tensioning device for a horizontal knitting machine according to claim 22, characterized in that: It also includes a push rod position adjustment unit, which is located on both sides of the lower part of the fixed base. It includes an adjustment rod for receiving the push rod as it moves down, a nut seat at one end of the adjustment rod, and an adjustment screw screwed to the nut seat. The lower part of the fixed base has symmetrical placement slots for placing the adjustment rod on both sides. A nut seat sliding slot communicating with the placement slot is located on one side of the lower part of the placement slot. A screw groove communicating with the nut seat sliding slot is located below the nut seat sliding slot. The nut seat is slidably located in the nut seat sliding slot, which can move up and down. The adjustment screw is rotatable but cannot move up and down and is located in the screw groove. Rotating the adjustment screw causes the adjustment rod to move up and down, so that the position of the push rod when it moves down is adjusted according to the vertically movable adjustment rod.

24. The alternating tensioning device for a horizontal knitting machine according to claim 23, characterized in that: The pull comb is positioned at a lateral interval between pull rakes, either between two adjacent pull rakes or between two adjacent pull rake units, wherein the pull rake unit is formed by multiple laterally parallel pull rakes.

25. A horizontal knitting machine, characterized in that: The alternating pulling device for a horizontal knitting machine as described in any one of claims 1 to 24 is adopted.

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