Knitting machine, yarn hooking device and yarn hooking method for flat knitting machine

Abstract

The present invention provides a yarn hooking device for a flat knitting machine, comprising a yarn hooking plate arranged below a yarn clamp, the yarn hooking plate having a yarn hooking head for hooking and pulling the needle thread end, a driving device for dragging the yarn hooking plate to perform the yarn hooking action, and a zero position sensor for controlling the action of the driving device after the flat knitting machine has knitted for a predetermined time. When the flat knitting machine starts knitting, the needle thread end is clamped by the yarn clamp, and the fabric is self-transported after a predetermined time of knitting, triggering the zero position sensor, causing the driving device to act, dragging the yarn hooking plate to swing, and the yarn hooking head of the yarn hooking plate hooks the starting thread end out of the yarn clamp. By setting the triggering control of the yarn hooking plate by the zero position sensor, it is ensured that the needle thread end is hooked out of the flat knitting machine, and it is avoided that the needle thread end of the fabric is hooked on the yarn clamp, resulting in the fabric being derailed or unable to be pulled and transported, thereby improving the knitting safety. The present invention also provides a knitting flat knitting machine and a yarn hooking method for a flat knitting machine.

Description

Technical Field

[0001] The present invention relates to the technical field of flat knitting machines, and more specifically, to a flat knitting machine, a yarn hooking device for the flat knitting machine, and a yarn hooking method for the flat knitting machine. Background Art

[0002] When the flat knitting machine is working, the yarn is weaved by the knitting needles. When the fabric is started to be knitted, the yarn ends need to be pressed and pulled by the flat knitting machine. After the first row of yarn is knitted, the base plate clamps the fabric by the bottom of the flat knitting machine and drags the fabric under the knitting plate for transportation.

[0003] Since the initial thread ends of the woven fabric are clamped by the clamping structure on the flat knitting machine, it is difficult to pull the thread ends out of the clamping structure during the transportation of the woven fabric, resulting in the woven fabric being unable to be smoothly transported in the flat knitting machine, affecting the normal knitting operation of the flat knitting machine.

[0004] Therefore, how to meet the requirements for pulling out the starting thread in the flat knitting machine process is a problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0005] In view of this, the present invention provides a yarn hooking device for a flat knitting machine to meet the requirements for pulling out the starting thread in the flat knitting machine weaving process; the present invention also provides a knitting flat knitting machine and a yarn hooking method for a flat knitting machine.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A yarn hooking device for a flat knitting machine comprises a yarn hooking plate arranged below a yarn clamp, wherein the yarn hooking plate has a yarn hooking head for hooking and pulling a needle thread end.

[0008] It also includes a driving device for dragging the yarn hooking plate to perform the yarn hooking action, and a zero position sensor for controlling the action of the driving device after the flat knitting machine has knitted for a predetermined time.

[0009] Preferably, in the above-mentioned yarn hooking device of the flat knitting machine, the yarn hooking head has a yarn hooking tooth portion extending from the yarn hooking plate.

[0010] Preferably, in the above-mentioned yarn hooking device of the flat knitting machine, the driving device is a driving motor that drags the yarn hooking plate to swing.

[0011] Preferably, the above-mentioned yarn hooking device for a flat knitting machine further includes a mounting bracket for mounting and supporting the hooking and pulling action of the yarn hooking plate.

[0012] Preferably, in the above-mentioned flat knitting machine yarn hooking device, the mounting bracket is provided with a first position sensor and a second position sensor for sensing and controlling the starting position and terminal position of the swinging of the yarn hooking plate, and the base of the yarn hooking plate is provided with a first sensing probe for sensing and cooperating with the first position sensor and the second position sensor.

[0013] Preferably, the above-mentioned flat knitting machine yarn hooking device also includes a bottom plate sliding device arranged in the flat knitting machine for pulling and transporting the woven fabric, the zero position sensor is arranged at the bottom of the slide rail of the bottom plate sliding device, and the second sensing probe of the zero position sensor is arranged at the bottom plate end of the bottom plate sliding device.

[0014] Preferably, in the above-mentioned yarn hooking device of the flat knitting machine, a controller is further included, and when the zero position sensor is triggered, the controller controls the driving motor to move in the first direction to drive the yarn hooking plate to perform the yarn hooking action;

[0015] When the second position sensor is triggered, the drive motor is controlled to move in a second direction, and when the first position sensor is triggered, the drive motor is controlled to stop.

[0016] Preferably, in the above-mentioned yarn hooking device of the flat knitting machine, a cover plate is also extended from the mounting bracket to separate and protect the yarn hooking plate and the weaving channel of the flat knitting machine.

[0017] Preferably, in the above-mentioned yarn hooking device of the flat knitting machine, the yarn hooking plate is provided with a mounting hole which runs through the thickness direction thereof, and the first sensing probe is embedded in the mounting hole.

[0018] A flat knitting machine, wherein a weaving channel for conveying fabric is arranged in its body, a bottom plate sliding device for pulling the fabric is arranged in the weaving channel, and a flat knitting machine yarn hooking device as described in any one of the above items cooperating with the bottom plate sliding device is arranged in the weaving channel.

[0019] A yarn hooking method for a flat knitting machine comprises a yarn hooking plate located below a yarn clamp of the flat knitting machine, the yarn hooking plate is driven by a driving device, and a zero position sensor is arranged on a bottom plate sliding device;

[0020] The bottom plate sliding device pulls the fabric for conveying. After the bottom plate slides to the bottom, the zero position sensor is triggered. The controller receives the control signal of the zero position sensor, controls the driving device to work, and the driving device drives the yarn hooking plate to perform the yarn hooking action.

[0021] Preferably, in the above-mentioned yarn hooking method for a flat knitting machine, a first sensing probe is arranged at the starting position of the yarn hooking plate, and a second sensing probe is arranged at the terminal position of the yarn hooking plate;

[0022] The driving device reverses when the yarn hooking plate swings and triggers the second sensing probe;

[0023] When the swing of the yarn hooking plate triggers the first sensing probe, the yarn hooking plate stops.

[0024] The yarn hooking device of the flat knitting machine provided by the present invention comprises a yarn hooking plate arranged below the yarn clamp, the yarn hooking plate has a yarn hooking head for hooking and pulling the needle thread end, and also comprises a driving device for dragging the yarn hooking plate to perform the yarn hooking action, and a zero position sensor for controlling the action of the driving device after the flat knitting machine weaves for a predetermined time. When the flat knitting machine starts knitting, the needle thread end is clamped by the yarn clamp, and the fabric is self-transported after the predetermined time of weaving, triggering the zero position sensor, the driving device is actuated, and the yarn hooking plate is dragged to swing, and the yarn hooking head of the yarn hooking plate hooks the starting thread end out of the yarn clamp. By setting the triggering control of the yarn hooking plate by the zero position sensor, it is ensured that the needle thread end is hooked out of the flat knitting machine, and it is avoided that the needle thread end is hooked on the yarn clamp during fabric transportation, resulting in the fabric being derailed or unable to be pulled and transported, thereby improving the knitting safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the arrangement position of the yarn hooking device of the flat knitting machine provided by the present invention on the flat knitting machine;

[0027] Figure 2 for Figure 1 Top view of;

[0028] Figure 3 for Figure 1 Schematic diagram of the first arrangement direction of the middle hook yarn plate;

[0029] Figure 4 for Figure 1 Schematic diagram of the second arrangement direction of the middle hook yarn plate;

[0030] Figure 5 for Figure 1 Schematic diagram of the layout of the center zero position sensor. DETAILED DESCRIPTION

[0031] The invention discloses a yarn hooking device for a flat knitting machine, which meets the requirement of pulling out the starting thread in the knitting process of the flat knitting machine; the invention also provides a flat knitting machine and a yarn hooking method for the flat knitting machine.

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1-Figure 5 As shown, Figure 1 A schematic diagram of the arrangement position of the yarn hooking device of the flat knitting machine provided by the present invention on the flat knitting machine; Figure 2 for Figure 1 Top view of; Figure 3 for Figure 1 Schematic diagram of the first arrangement direction of the middle hook yarn plate; Figure 4 for Figure 1 Schematic diagram of the second arrangement direction of the middle hook yarn plate; Figure 5 for Figure 1 Schematic diagram of the layout of the center zero position sensor.

[0034] This embodiment provides a yarn hooking device for a flat knitting machine, including a yarn hooking plate 1 arranged below a yarn clamp, the yarn hooking plate 1 having a yarn hooking head 11 for hooking and pulling the needle thread end, a driving device 2 for dragging the yarn hooking plate 1 to perform the yarn hooking action, and a zero position sensor 3 for controlling the action of the driving device after the flat knitting machine has knitted for a predetermined time. When the flat knitting machine starts knitting, the needle thread end is clamped by the yarn clamp (shown in the figure is the yarn clamp installation position 4, which is located on one side of the length direction of the flat knitting machine 5), the fabric is self-transported after a predetermined time of knitting, the zero position sensor 3 is triggered, the driving device is actuated, the yarn hooking plate 1 is dragged to swing, and the yarn hooking head 11 of the yarn hooking plate 1 hooks the starting thread end out of the yarn clamp, and the yarn hooking plate 1 is controlled by the triggering of the zero position sensor 3 to ensure that the needle thread end is hooked out of the flat knitting machine 5, so as to avoid the needle thread end of the fabric being hooked on the yarn clamp, resulting in the fabric being derailed or unable to be pulled and transported, thereby improving the knitting safety.

[0035] In a specific embodiment of the present case, the yarn hooking head 11 has a yarn hooking tooth portion extending from the yarn hooking plate 1. When the flat knitting machine 5 is knitting, the needle thread end is clamped by the yarn clamp. During the knitting process of the knitting needle, the fabric is pulled down, driving the needle thread end to fall synchronously. Due to the adhesion between the yarn clamp and the needle thread end, the needle thread end cannot be smoothly detached. The protruding height of the yarn hooking head is set to extend below the knitting position of the fabric output needle plate. After the needle thread is tightened by the fabric or falls with the fabric, it can be hooked by the yarn hooking head 11. In particular, a tooth-shaped yarn hooking tooth portion is set on the yarn hooking head 11. The yarn hooking tooth portion has a serrated structure as a whole, which prevents the yarn from slipping and escaping from the yarn hooking plate, and ensures that the needle thread end can be hooked and pulled from the yarn clamp by the yarn hooking tooth portion.

[0036] Preferably, the driving device 2 is a driving motor that drags the yarn hooking plate 1 to swing. The needle thread is pulled along the length direction of the flat knitting machine 5, and the hooking plate 1 swings in the width direction of the flat knitting machine, so that the needle yarn can be hooked and pulled. The driving device 2 uses a driving motor, and the forward and reverse rotation of the yarn hooking plate can be adjusted by controlling the forward and reverse rotation of the motor.

[0037] In a specific embodiment of the present case, a mounting bracket 6 is also included to support the hooking action of the yarn hooking plate 1. The mounting bracket 6 provides support for the work of the yarn hooking plate 1. Specifically, the mounting bracket 6 is fixedly mounted on the bottom of the needle bed base of the flat knitting machine 5, the driving motor is fixedly mounted on the mounting bracket 5, and the yarn hooking plate 1 is fixedly mounted on the output end of the driving motor.

[0038] In a specific embodiment of the present case, a first position sensor 12 and a second position sensor 13 for sensing and controlling the starting position and terminal position of the swing of the yarn hooking plate 1 are provided on the mounting bracket 6, and a first sensing probe 14 for sensing and cooperating with the first position sensor 12 and the second position sensor 13 is provided at the base of the yarn hooking plate 1.

[0039] The driving motor drives the yarn hooking plate 1 to swing, and it has a starting position and a terminal position. The starting position is the normal arrangement position of the yarn hooking plate 1 before the knitting work begins, and at this time, the bottom plate does not perform the pulling work of the fabric. The terminal position is the maximum rotation position driven by the driving motor to swing the yarn hooking plate 1 after the yarn hooking plate 1 swings to hook the yarn during the knitting work. At this position, the yarn hooking plate 1 hooks and drags the needle thread end with its yarn hooking head 11. When the yarn hooking plate 1 swings to this position, due to the weight of the fabric and the pulling of the needle thread end, its hooking length has exceeded its reserved maximum length, and the needle thread end can be detached from the yarn clamp.

[0040] In order to accurately determine the starting position and the terminal position to ensure that the drive motor realizes the drive state conversion when reaching the predetermined position, a first position sensor 12 and a second position sensor 13 are provided. The first position sensor 12 and the second position sensor 13 are control switches for the working state of the drive motor.

[0041] In a specific embodiment of the present case, the yarn hooking plate 1 is provided with a mounting hole 14 penetrating through the thickness direction thereof, and the first sensing probe is embedded in the mounting hole 14 .

[0042] Specifically, a first induction probe is arranged near the base of the yarn hooking plate 1, and a first position sensor 12 and a second position sensor 13 are distributed at the top and bottom of the shaft end of the driving motor. The first position sensor 12 and the second position sensor 13 are magnetic induction sensors or iron induction sensors, and the corresponding first induction probe is a magnetic induction probe or an iron induction probe.

[0043] To illustrate the working control of the driving motor by the first position sensor 12 and the second position sensor 13, the yarn hooking device further includes a base plate slide device 7 arranged in the flat knitting machine 5 for pulling and transporting the woven fabric, the zero position sensor 3 is arranged at the bottom of the slide rail of the base plate slide device 7, and the second sensing probe of the zero position sensor 3 is arranged at the base plate end of the base plate slide device.

[0044] When the fabric is woven on the flat knitting machine, it is transported by the fabric conveying channel inside the base. In the initial knitting of the few coils, the fabric is short in length and light in weight, so it is difficult to transport the fabric by itself in the flat knitting machine. The bottom plate sliding device 7 includes a bottom plate (not shown in the figure), which clamps the fabric at the beginning of fabric weaving and drags the fabric along the built-in slide rail guide of the bottom plate sliding device 7 to provide the conveying power of the fabric. By utilizing the up and down sliding of the bottom plate, a zero position sensor 3 is set on the bottom plate sliding device 7 to cooperate with the position sensing of the bottom plate. The bottom plate drags the fabric down to the bottom of the high roller, releases the fabric, and when the bottom plate automatically descends to the position of the zero position sensor 3, the zero position sensor 3 is triggered to control the driving motor to work, and the yarn hooking plate 1 performs the yarn hooking action. The zero position sensor 3 is also triggered by the second sensing probe. The second sensing probe is set at the end of the bottom plate. When it slides to the bottom of the bottom plate sliding device, the zero position sensor triggers and outputs the control instruction to the driving motor.

[0045] This embodiment also provides a yarn hooking method for a flat knitting machine, comprising a yarn hooking plate 1 located below a yarn clamp of the flat knitting machine, the yarn hooking plate 1 being driven by a driving device 2, and a zero position sensor 3 being arranged on a bottom plate sliding device 7;

[0046] The bottom plate sliding device 7 pulls the fabric for conveying. After the bottom plate slides to the bottom, the zero position sensor 3 is triggered. The controller receives the control signal of the zero position sensor 3, controls the driving device to work, and the driving device 2 drives the yarn hooking plate 1 to perform the yarn hooking action.

[0047] Preferably, a first position sensor 12 is provided at the starting position of the yarn hooking plate 1, and a second position sensor 13 is provided at the terminal position of the yarn hooking plate 1; the driving device 2 reverses when the yarn hooking plate 1 swings and triggers the second position sensor 13;

[0048] When the swing of the yarn hooking plate triggers the first position sensor, it stops.

[0049] In a specific embodiment of the present case, a controller is also included. When the zero position sensor 3 is triggered, the controller controls the drive motor to move in the first direction to drive the yarn hooking plate 1 to perform the yarn hooking action; when the second position sensor 13 is triggered, the controller controls the drive motor to move in the second direction, and when the first position sensor 12 is triggered, the controller controls the drive motor to stop.

[0050] The first direction and the second direction are the two directions of forward rotation and reverse rotation of the driving motor. The yarn hooking device also includes a controller, which controls the driving motor to rotate forward when the zero position sensor 3 is triggered, driving the yarn hooking plate 1 to perform the yarn hooking action; when the yarn hooking plate 1 rotates a predetermined angle, the first sensing probe on it rotates to the second position sensor 13, the second position sensor 13 is triggered, and the controller controls the driving motor to reverse. Specifically, the reverse control of the driving motor can be set to issue a reverse command immediately after the zero position sensor 3 is triggered, or it can be set to start reversing after the fabric is woven for a predetermined number of rows, so as to meet the weaving requirements of different fabrics.

[0051] The yarn hooking plate 1 is reversed, so that the first sensing probe thereon approaches the first position sensor 12 and is triggered, and the driving motor is controlled to stop.

[0052] The control process of the driving motor by the above controller starts from the bottom plate moving down to the zero position sensor triggering, and the driving motor reverses to drive the yarn hooking plate to return to the initial position structure, ensuring that the yarn hooking action can be effectively performed during each weaving operation of the flat knitting machine.

[0053] In a specific embodiment of the present case, a cover plate 61 is also extended from the mounting bracket 6 to isolate and protect the yarn hooking plate 1 and the weaving channel of the flat knitting machine. The drive motor and the yarn hooking plate 1 are arranged on the mounting bracket 6, which is arranged close to the yarn clamp and located below the base. In order to avoid the hooking of the yarn hooking plate 1 during the fabric conveying process, the cover plate 61 is set to block the output shaft of the yarn hooking plate 1 and the drive motor. The cover plate 61 is fixed to the bottom of the mounting bracket 6, and an opening slit for the swing of the yarn hooking plate is provided on the cover plate 61 to avoid interference with the swing of the yarn hooking plate.

[0054] A flat knitting machine, wherein a weaving channel for conveying fabric is arranged in its body, a bottom plate sliding device for pulling the fabric is arranged in the weaving channel, and a flat knitting machine yarn hooking device as described in any one of the above items cooperating with the bottom plate sliding device is arranged in the weaving channel.

[0055] Based on the flat knitting machine yarn hooking device provided in the above embodiment, the present invention also provides a knitting flat knitting machine, in which a weaving channel for conveying the fabric is arranged in the machine body, a bottom plate sliding device for pulling the fabric is arranged in the weaving channel, and a flat knitting machine yarn hooking device as provided in the above embodiment and cooperating with the bottom plate sliding device is arranged in the weaving channel.

[0056] Since the knitting machine adopts the yarn hooking device of the above-mentioned embodiment, please refer to the above-mentioned embodiment for the beneficial effects brought by the yarn hooking device of the knitting machine.

[0057] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A yarn hooking device for a flat knitting machine, characterized in that: The invention comprises a yarn hooking plate arranged below the yarn clamp, wherein the yarn hooking plate has a yarn hooking head for hooking and pulling the needle thread end. It also includes a driving device for dragging the yarn hooking plate to perform the yarn hooking action, and a zero position sensor for controlling the action of the driving device after the flat knitting machine has knitted for a predetermined time; The yarn hooking head has a yarn hooking tooth portion extending from the yarn hooking plate; The driving device is a driving motor that drives the yarn hooking plate to swing; It also includes a mounting bracket for mounting and supporting the hooking and pulling action of the yarn hooking plate; The mounting bracket is provided with a first position sensor and a second position sensor for sensing and controlling the starting position and the terminal position of the swing of the yarn hooking plate, and the base of the yarn hooking plate is provided with a first sensing probe for sensing and cooperating with the first position sensor and the second position sensor; the first position sensor is located at a position on the mounting bracket corresponding to the top of the shaft end of the driving motor, and the second position sensor is located at a position on the mounting bracket corresponding to the bottom of the shaft end of the driving motor; It also includes a bottom plate slide device arranged in the flat knitting machine for pulling and conveying the fabric, the zero position sensor is arranged at the bottom of the slide rail of the bottom plate slide device, and the second sensing probe for triggering the zero position sensor is arranged at the bottom plate end of the bottom plate slide device; It also includes a controller, which controls the driving motor to move in a first direction to drive the yarn hooking plate to perform a yarn hooking action when the zero position sensor is triggered; When the second position sensor is triggered, the drive motor is controlled to move in a second direction, and when the first position sensor is triggered, the drive motor is controlled to stop.

2. The yarn hooking device of a flat knitting machine according to claim 1, characterized in that: A cover plate for isolating and protecting the yarn hooking plate and the weaving channel of the flat knitting machine also extends out from the mounting bracket.

3. The yarn hooking device of a flat knitting machine according to claim 1, characterized in that: The yarn hooking plate is provided with a mounting hole which runs through the thickness direction thereof, and the first sensing probe is embedded in the mounting hole.

4. A flat knitting machine, wherein a knitting channel for conveying fabric is provided in the machine body, characterized in that: The weaving channel is provided with a flat knitting machine yarn hooking device as described in any one of claims 1-3.

5. A flat knitting machine hooking method, characterized in that: It adopts the flat knitting machine yarn hooking device as described in any one of claims 1 to 3; The bottom plate sliding device pulls the fabric for transportation. After the bottom plate slides to the bottom, the zero position sensor is triggered. When the zero position sensor is triggered, the controller controls the driving motor to move in a first direction to drive the yarn hooking plate to perform a yarn hooking action; When the second position sensor is triggered, the drive motor is controlled to move in a second direction, and when the first position sensor is triggered, the drive motor is controlled to stop.

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