A pulling rake for computerized flat knitting machine

Abstract

A pulling rake for a computerized flat knitting machine comprises a pulling hook, a pulling seat, a pulling rod, a rake frame, a cover, a support seat, an arc-shaped piece and a transmission shaft, wherein the support seat is installed in the cover, the transmission shaft is installed on the support seat, a plurality of arc-shaped pieces are installed on the transmission shaft at intervals, and two adjacent arc-shaped pieces are staggered to form an "S" shape; the rake frame is installed on the cover, and a plurality of vertical slide grooves are provided on the rake frame along its own length direction; a plurality of pulling rods are installed in corresponding vertical slide grooves, each pulling rod has a pulling seat at the top, and a pulling hook is provided on the pulling seat; a curved piece is provided at the bottom of each pulling rod, and when the transmission shaft drives the curved piece to rotate, each pulling rod can independently reciprocate up and down under the driving action of the curved piece; a plurality of stop devices are installed on the rake frame, which are used to stop the action of the corresponding pulling rod according to demand. The present invention can reduce the local pulling width to 0.5 inches, so that the flat knitting machine can not only weave a braided fabric with a complex structure, but also greatly improve the yield rate of the braided fabric.

Description

Technical Field

[0001] The invention relates to the technical field of computerized flat knitting machines, in particular to a pulling rake for a computerized flat knitting machine. Background Art

[0002] As is known in the industry, during the process of weaving fabrics on a flat knitting machine, a pulling device is usually used to pull the woven fabric downwards in order to prevent the coils from floating up.

[0003] Initially, the pulling devices installed on the flat knitting machines were mostly roller devices. When working, two rollers with opposite rotation directions were used to clamp the woven fabric, and the woven fabric was pulled downward under the action of the rotational force. Since the roller device pulls the woven fabric simultaneously through the overall rotational movement, that is, the woven fabric is pulled as a whole, its pulling force depends on the rotation speed of the roller roller and the surface friction of the roller rubber layer. It is impossible to achieve precise control of the pulling force during normal operation, and it is even more impossible to achieve selective local pulling of the woven fabric. Even if it is improved to a segmented roller device, its pulling effect is not very ideal and it is easy to produce waste. In case of complex weaving, such as fully molded weaving, the required pulling effect cannot be achieved. In addition, the rubber layer in the roller also has a certain lossiness. When the woven fabric is pulled to a certain extent, it will be deformed, increasing the scrap rate.

[0004] Later, some manufacturers designed pulling rakes, such as the Chinese utility model patent No. ZL201922199702.8, named "A motor-driven woven fabric pulling device". When it is in operation, it replaces the original roller device by arranging several groups of pulling rakes arranged side by side under the needle plate of the knitting machine corresponding to one side or both sides of the path of the woven fabric. When working, the pulling hooks in adjacent pulling rakes move up and down alternately to achieve continuous downward pulling of the woven fabric.

[0005] Although the above-mentioned pulling rake overcomes the shortcomings of the existing roller device that it is unable to selectively pull the woven fabric locally, it is restricted by some factors (such as the specifications of the motor, because the thinner the diameter of the motor, the smaller the power). The width of each pulling rake is designed to be 1.5 inches (other types of pulling rakes on the market currently also have this width), and the several rows of pulling hooks arranged on the upper part of each pulling rake are all driven upward by the motor at the bottom when working. In other words, the existing pulling rake can only reduce the local pulling width of the woven fabric to 1.5 inches. Although this pulling width has met the production requirements of most woven fabrics at present, for woven fabrics with complex structures, if a pulling rake with this pulling width is forcibly used, it will be easy to cause the parts of the woven fabric that do not need to be pulled to become fluffy or even scratched due to the reciprocating pulling of the pulling hooks, which seriously affects the yield of the woven fabric. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a pulling rake for a computerized flat knitting machine which can reduce the local pulling width to 0.5 inches, so that the flat knitting machine can not only weave a woven fabric with a complex structure, but also greatly improve the yield of the woven fabric.

[0007] The technical solution of the present invention is to provide a pulling rake for a computer flat knitting machine with the following structure, including a pulling hook, a pulling seat, a pulling rod, a rake frame, a cover, a support seat, an arc-shaped piece and a transmission shaft, wherein the support seat is installed in the cover, the transmission shaft is transversely installed on the support seat, and one end is connected to the driving device, there are a plurality of arc-shaped pieces, and they are all installed on the transmission shaft at intervals, and two adjacent arc-shaped pieces are staggered to form an "S" shape; the rake frame is vertically installed on the cover, and a plurality of vertical slide grooves are provided on the rake frame along its own length direction; there are a plurality of pulling rods, and they are respectively installed in corresponding vertical slide grooves, each pulling rod has a pulling seat at the top, and a pulling hook is installed on the pulling seat; each pulling rod has an arc-shaped piece at the bottom, and when the transmission shaft drives the arc-shaped piece to rotate, each pulling rod can independently reciprocate up and down under the pushing action of the arc-shaped piece; a plurality of stopping devices are installed on the rake frame for stopping the action of the corresponding pulling rod according to demand.

[0008] The present invention discloses a pulling rake for a computerized flat knitting machine, wherein the stopping device is an electromagnet, and each pulling rod is provided with an iron sheet seat attracted by a power supply magnet.

[0009] The present invention discloses a pulling rake for a computerized flat knitting machine, wherein the stopping device is a solenoid valve, and a notch for inserting a valve stem of the solenoid valve is provided on the side wall of each pulling rod.

[0010] The present invention relates to a pulling rake for a computerized flat knitting machine, wherein an elastic reset device is provided at the bottom of the pulling rod.

[0011] The present invention discloses a pulling rake for a computerized flat knitting machine, wherein the elastic reset device comprises a tension spring, a tension spring seat and a tension adjustment screw, wherein the tension spring seat is located in the lower inner cavity of the rake frame, and the tension adjustment screw is vertically installed at the bottom of the rake frame and inserted into a threaded hole provided on the tension spring seat, wherein the number of the tension springs corresponds one to one to the number of pulling rods, and one end of each tension spring is mounted on the corresponding pulling rod, and the other end is mounted on the tension spring seat.

[0012] The present invention provides a pulling rake for a computerized flat knitting machine, wherein each pulling rod is provided with a raised section at the bottom, and a roller is provided on the raised section, and the roller is in contact with the arched outer wall of the arc-shaped sheet.

[0013] The present invention discloses a pulling rake for a computerized flat knitting machine, wherein the pulling hook is composed of a hook portion and a counterweight portion as an integral whole, and the contact portion between the hook portion and the counterweight portion is connected to the pulling seat through a pin shaft and a pin hole, and when the pulling rod drives the pulling seat to move upward, the hook portion of the pulling hook automatically retracts into the pulling seat under the blocking effect of the woven fabric, and when the pulling rod drives the pulling seat to move downward, the hook portion automatically extends out from the pulling seat under the action of the counterweight portion.

[0014] The present invention relates to a pulling rake for a computerized flat knitting machine, wherein a limiting step is provided at the front of the hooking portion.

[0015] The present invention discloses a pulling rake for a computerized flat knitting machine, wherein a waist-shaped hole is provided on the counterweight portion near the pin hole, a limit pin is provided in the waist-shaped hole, and the limit pin is installed on the pulling seat.

[0016] The present invention discloses a pulling rake for a computerized flat knitting machine, wherein a protective cover is installed on the upper part of the rake frame, and a vertical long groove corresponding to the pulling hook position on the protective cover is provided for the pulling hook to move up and down, and a guide groove is provided on the pulling rod along its own length direction, and a cylindrical pin is provided in the guide groove, and the cylindrical pin is installed on the rake frame, and the guide groove consists of an upper vertical groove section and a bottom oblique groove section. When the pulling rod drives the pulling seat to move upward, the pulling hook automatically retracts into the cavity surrounded by the protective cover and the rake frame under the action of the guide groove and the cylindrical pin, and when the pulling rod drives the pulling seat to move downward, the pulling hook will automatically extend from the cavity surrounded by the protective cover and the rake frame under the action of the guide groove and the cylindrical pin.

[0017] After adopting the above structure, compared with the prior art, the pulling rake for a computer flat knitting machine of the present invention has the following advantages: the pulling rake of the present invention is designed to be a structure consisting of a pulling hook, a pulling seat, a pulling rod, a rake frame, a cover shell, a support seat, an arc-shaped piece and a transmission shaft, and the support seat is installed in the cover shell, the transmission shaft is horizontally installed on the support seat, and one end is connected to the driving device, there are a plurality of arc-shaped pieces, and they are all installed on the transmission shaft at intervals, and two adjacent arc-shaped pieces are staggered to form an "S" shape, the rake frame is vertically installed on the cover shell, and a plurality of vertical slide grooves are provided on the rake frame along its own length direction, there are a plurality of pulling rods, and they are respectively installed in corresponding vertical slide grooves, each pulling rod has a pulling seat on the top, a pulling hook is installed on the pulling seat, and each pulling rod has an arc-shaped piece at the bottom, when When the transmission shaft drives the arc-shaped piece to rotate, each pulling rod can independently reciprocate up and down under the pushing action of the arc-shaped piece. A number of stop devices are installed on the rake frame to stop the movement of the corresponding pulling rod according to demand. It can be seen that the present invention realizes the individual control of a certain pulling rod through reasonable structural design. Since each pulling rod only occupies a width of 0.5 inches, the present invention reduces the local pulling width of the fabric to 0.5 inches. Therefore, when weaving a fabric with a complex structure, if a certain part does not need to be pulled, the corresponding pulling rod can be stopped separately, thereby avoiding the pulling hook driving the pulling hook to reciprocate and pull the part that does not need to be pulled, causing the fabric to fuzz and crack, thereby greatly improving the yield rate of the flat knitting machine when weaving fabrics with complex structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a left-view stereoscopic structural schematic diagram of a pulling rake for a computerized flat knitting machine of the present invention;

[0019] Figure 2 yes Figure 1 Schematic diagram of the partial decomposition structure when the cover is hidden;

[0020] Figure 3 yes Figure 1 A schematic diagram of the right-side stereoscopic structure when the cover is hidden;

[0021] Figure 4 yes Figure 2 A three-dimensional enlarged structural diagram of the middle pulling hook, the pulling seat and the pulling rod when assembled together;

[0022] Figure 5 yes Figure 3 A schematic diagram of the three-dimensional structure when the middle arc-shaped piece and the transmission shaft are assembled together;

[0023] Figure 6 yes Figure 4 A three-dimensional enlarged structural diagram of the middle traction hook;

[0024] Figure 7is a schematic diagram of the three-dimensional structure of the second embodiment of the invention;

[0025] Figure 8 It is a three-dimensional enlarged structural schematic diagram of the pulling hook, the pulling seat and the pulling rod in the third embodiment of the invention when they are assembled together. DETAILED DESCRIPTION

[0026] The following is a further detailed description of a pulling rake for a computerized flat knitting machine of the present invention in conjunction with the accompanying drawings and specific embodiments:

[0027] Embodiment 1

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, in this specific embodiment, a pulling rake for a computerized flat knitting machine of the present invention comprises a pulling hook 11, a pulling seat 10, a pulling rod 7, a rake frame 6, a cover 1, a support seat 2, an arc-shaped sheet 3 and a transmission shaft 5. The support seat 2 is installed in the inner cavity of the cover 1; the transmission shaft 5 is transversely installed on the support seat 2 through a bearing; one end of the transmission shaft 5 is connected to a driving device, and driven by the driving device, the transmission shaft 5 can rotate around its own axis; combined with Figure 5 There are four arc-shaped pieces 3, and they are all installed on the transmission shaft 5 at intervals, and two adjacent arc-shaped pieces 3 are staggered to form an "S" shape.

[0029] The rake frame 6 is vertically mounted on the cover 1, and four vertical slide grooves 61 are arranged along the length direction of the rake frame 6. There are four pulling rods 7, which are respectively mounted in the corresponding vertical slide grooves 61.

[0030] A pulling seat 10 is provided at the top of each pulling rod 7 , and a pulling hook 11 is mounted on the pulling seat 10 ; and cover plates 101 are mounted on both sides of each pulling seat 10 for protecting the pulling hook 11 .

[0031] Combination Figure 6 The pulling hook 11 is composed of a hook portion 111 and a counterweight portion 112 as an integral whole, and the contact portion of the hook portion 111 and the counterweight portion 112 is connected to the pulling seat 10 through a pin shaft and a pin hole 113. When the pulling rod 7 drives the pulling seat 10 to move upward, the hook portion 111 of the pulling hook 11 automatically retracts into the pulling seat 10 under the blocking effect of the braid; when the pulling rod 7 drives the pulling seat 10 to move downward, the hook portion 111 automatically extends from the pulling seat 10 under the effect of the counterweight portion 112, and starts to pull the braid downward.

[0032] A limiting step 115 is provided at the front of the hooking part 111, and the limiting step 115 plays a limiting role to prevent the pulling hook 11 from piercing a large hole in the braid when pulling the braid downward, thereby damaging the braid. A waist-shaped hole 114 is provided near the pin hole 113 on the counterweight part 112, and a limiting pin is provided in the waist-shaped hole 114, and the limiting pin is installed on the pulling seat 10. The setting of the waist-shaped hole 114 and the limiting pin can limit the travel range of the pulling hook 11, ensuring that the pulling hook 11 is extended and retracted in time during work, thereby achieving the purpose of improving the working efficiency of pulling the braid.

[0033] The bottom of the pulling rod 7 is provided with an elastic reset device 4, which includes a tension spring 41, a tension spring seat 42 and a tension adjustment screw 43. The tension spring seat 42 is located in the lower inner cavity of the rake frame 6, and the tension adjustment screw 43 is vertically inserted into the mounting hole 62 opened at the bottom of the rake frame 6. The upper part of the adjustment screw 43 is located in the threaded hole opened on the tension spring seat 42. The number of tension springs 41 corresponds to the number of pulling rods 7, which is also four. One end of each tension spring 41 is hooked on the corresponding pulling rod 7, and the other end is hooked on the tension spring seat 42. In actual use, by twisting the adjustment screw 43, the tension of the tension spring 41 can be adjusted, thereby changing the reset force of the pulling rod 7.

[0034] Each pulling rod 7 has an arc-shaped piece 3 at the bottom. When the transmission shaft 5 drives the arc-shaped piece 3 to rotate, each pulling rod 7 can independently reciprocate up and down under the pushing action of the arc-shaped piece 3.

[0035] Each pulling rod 7 has a raised section 71 at the bottom, and a roller 72 is provided on the raised section 71, and the roller 72 is in contact with the arched outer wall of the arc-shaped sheet 3. When the arc-shaped sheet 3 pushes the pulling rod 7 to move upward, the roller 72 directly contacts with the arched outer wall of the arc-shaped sheet 3, which can effectively reduce the friction between the arc-shaped sheet 3 and the bottom of the pulling rod 7.

[0036] A plurality of stop devices 8 are installed on the rake frame 6. The number of the stop devices 8 corresponds to the number of the pulling rods 7, which is also four, and is used to individually stop the up and down pulling action of the corresponding pulling rods 7 according to demand. The stop device 8 is specifically an electromagnet, and each pulling rod 7 is equipped with an iron sheet seat 13 attracted by a power supply magnet. When weaving a woven fabric with a complex structure, if a certain part does not need to be pulled, the electromagnet at that part can be energized to make the electromagnet and the corresponding iron sheet seat 13 that moves upward with the pulling rod 7 attract each other. This attraction force is greater than the downward reset pulling force of the tension spring 41 on the pulling rod 7, thereby stopping the pulling rod 7 at that part individually.

[0037] The upper part of the rake frame 6 is provided with a shield 9, and the shield 9 is provided with a vertical slot 91 for the pulling hook 11 to move up and down. The lower part of the rake frame 6 is provided with a side cover 12, which plays a certain protective role on the elastic reset device 4.

[0038] Combination Figure 4 A guide groove 73 is provided on the pulling rod 7 along its length direction; a cylindrical pin is provided in the guide groove 73, and the cylindrical pin is installed on the rake frame 6; the guide groove 73 is composed of an upper vertical groove section 731 and a bottom oblique groove section 732. When the pulling rod 7 drives the pulling seat 10 to move upward, the pulling hook 11 automatically retracts into the cavity surrounded by the shield 9 and the rake frame 6 under the action of the oblique groove section 732 and the cylindrical pin. When the pulling rod 7 drives the pulling seat 10 to move downward, the pulling hook 11 will automatically extend from the cavity surrounded by the shield 9 and the rake frame 6 under the action of the vertical groove section 731 and the cylindrical pin, and start to pull the braided fabric.

[0039] When in use, several pulling rakes of the present invention can be installed side by side under the needle plate corresponding to one side or both sides of the path through which the fabric passes, and the pulling hooks 11 in each pulling rod 7 can be alternately moved up and down to realize continuous pulling downward of the fabric. The present invention realizes the individual control of a certain pulling rod 7 through reasonable structural design. Since each pulling rod 7 only occupies a width of 0.5 inches, the present invention reduces the local pulling width of the fabric to 0.5 inches. Therefore, when weaving a fabric with a complex structure, if a certain part does not need to be pulled, the corresponding pulling rod 7 can be stopped separately, avoiding the pulling hook 11 from driving the pulling hook 11 to reciprocate and pull the part that does not need to be pulled, causing the fabric to be fluffed and cracked, and greatly improving the yield rate of the flat knitting machine when weaving a fabric with a complex structure.

[0040] Embodiment 2

[0041] See also Figure 7 The difference between the second embodiment and the first embodiment is that two stop devices 8 are provided, and each stop device 8 can stop the up and down pulling action of the two pulling rods 7 at the same time. Calculated based on the width of each pulling rod occupying 0.5 inches, the two pulling rods 7 are 1 inch in total, that is, the present invention reduces the local pulling width of the braided fabric to 1 inch, which can basically meet the braiding requirements for complex braided fabrics.

[0042] Embodiment 3

[0043] See also Figure 8 The only difference between the third embodiment and the first embodiment is that the stopping device 8 is designed as an electromagnetic valve, and a notch 74 for inserting the valve stem of the electromagnetic valve is provided on the side wall of each pulling rod 7, so that when working, the corresponding pulling rod 7 can be stopped separately by controlling the electromagnetic valve to prevent it from driving the pulling hook 11 to reciprocate the part of the braid that does not need to be pulled.

[0044] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope of the present invention.

Claims

1. A pulling rake for a computerized flat knitting machine, comprising a pulling hook (11), a pulling seat (10), a pulling rod (7) and a rake frame (6), characterized in that: It also comprises a housing (1), a support seat (2), an arc-shaped sheet (3) and a transmission shaft (5), wherein the support seat (2) is mounted in the housing (1), the transmission shaft (5) is transversely mounted on the support seat (2), one end of which is connected to a driving device, a plurality of arc-shaped sheets (3) are mounted on the transmission shaft (5) at intervals, and two adjacent arc-shaped sheets (3) are staggered to form an "S" shape; The rake frame (6) is vertically mounted on the cover (1), and a plurality of vertical slide grooves (61) are provided on the rake frame (6) along its length direction; There are a plurality of pulling rods (7), which are respectively installed in corresponding vertical slide grooves (61). A pulling seat (10) is provided at the top of each pulling rod (7), and a pulling hook (11) is installed on the pulling seat (10); Each of the pulling rods (7) has an arc-shaped piece (3) at the bottom, and when the transmission shaft (5) drives the arc-shaped piece (3) to rotate, each pulling rod (7) can independently reciprocate up and down under the driving action of the arc-shaped piece (3); The rake frame (6) is provided with a plurality of stop devices (8) for stopping the movement of the corresponding pulling rods (7) according to requirements; An elastic reset device (4) is provided at the bottom of the pulling rod (7); The elastic reset device (4) comprises a tension spring (41), a tension spring seat (42) and a tension adjustment screw (43), wherein the tension spring seat (42) is located in the lower inner cavity of the rake frame (6), and the tension adjustment screw (43) is vertically mounted on the bottom of the rake frame (6) and inserted into a threaded hole provided on the tension spring seat (42). The number of the tension springs (41) corresponds to the number of the pulling rods (7), and one end of each tension spring (41) is mounted on the corresponding pulling rod (7), and the other end is mounted on the tension spring seat (42); The pulling hook (11) is composed of a hook portion (111) and a counterweight portion (112) which are integrally formed. The portion where the hook portion (111) and the counterweight portion (112) are in contact is connected to the pulling seat (10) via a pin shaft and a pin hole (113). When the pulling rod (7) drives the pulling seat (10) to move upward, the hook portion (111) of the pulling hook (11) is automatically retracted into the pulling seat (10) under the blocking effect of the braided fabric. When the pulling rod (7) drives the pulling seat (10) to move downward, the hook portion (111) is automatically extended from the pulling seat (10) under the effect of the counterweight portion (112).

2. A pulling rake for a computerized flat knitting machine according to claim 1, characterized in that: The stopping device (8) is an electromagnet, and each of the pulling rods (7) is provided with an iron sheet seat (13) attracted by a power supply magnet.

3. The pulling rake for a computerized flat knitting machine according to claim 1, characterized in that: The stopping device (8) is a solenoid valve, and a notch (74) for inserting a valve stem of the solenoid valve is provided on the side wall of each pulling rod (7).

4. The pulling rake for a computerized flat knitting machine according to claim 1, characterized in that: The bottom of each pulling rod (7) is provided with a raised section (71), and a roller (72) is provided on the raised section (71), and the roller (72) fits with the arched outer wall of the arc-shaped sheet (3).

5. The pulling rake for a computerized flat knitting machine according to claim 1, characterized in that: A limiting step (115) is provided at the front of the hook portion (111).

6. A pulling rake for a computerized flat knitting machine according to claim 5, characterized in that: A waist-shaped hole (114) is provided on the counterweight portion (112) near the pin hole (113), a limit pin is provided in the waist-shaped hole (114), and the limit pin is mounted on the pulling seat (10).

7. A pulling rake for a computerized flat knitting machine according to claim 6, characterized in that: The upper part of the rake frame (6) is provided with a shield (9), and a vertical long groove (91) is provided on the shield (9) at a position corresponding to the pulling hook (11) for the pulling hook (11) to move up and down. The pulling rod (7) is provided with a guide groove (73) along its length direction, and a cylindrical pin is provided in the guide groove (73). The cylindrical pin is installed on the rake frame (6). The guide groove (73) consists of a vertical groove section (731) at the upper part and an inclined groove section (732) at the bottom. When the pulling rod (7) drives the pulling seat (10) to move upward, the pulling hook (11) automatically retracts into the cavity formed between the shield (9) and the rake frame (6) under the action of the guide groove (73) and the cylindrical pin; when the pulling rod (7) drives the pulling seat (10) to move downward, the pulling hook (11) automatically extends out from the cavity formed between the shield (9) and the rake frame (6) under the action of the guide groove (73) and the cylindrical pin.

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