Autonomous weft yarn insertion nozzle device and flat knitting machine

Abstract

The utility model relates to an automatic weft yarn insertion nozzle device and a flat knitting machine, the automatic weft yarn insertion nozzle device comprises a Uz seat, a yarn nozzle rod, a yarn guide piece, a yarn threading piece and a machine head connecting piece, the machine head connecting piece is horizontally arranged at the upper end of the Uz seat along the left-right direction, two ends of the machine head connecting piece protrude to form lugs, the yarn nozzle rod is vertically arranged in the middle of the lower part of the Uz seat, and the yarn guide piece is arranged on the yarn nozzle rod. The upper end of the yarn feeder rod is connected with the yarn feeder seat, the yarn guide piece is installed in the middle of the yarn feeder rod, the yarn threading piece is installed at the lower end of the yarn feeder rod, the yarn feeder is characterized by further comprising two yarn pressing mechanisms, the two yarn pressing mechanisms are both vertically arranged below the two sides of the yarn feeder seat, and the two convex lugs are both provided with induction pieces used for inducting whether the machine head gets close to or makes contact with the yarn feeder seat. Each sensing piece corresponds to the corresponding yarn pressing mechanism on the opposite side, the two sensing pieces and the two yarn pressing mechanisms are all electrically connected with an upper controller of the flat knitting machine, the upper controller controls the corresponding yarn pressing mechanism to extend when any sensing piece senses a signal, and the yarn pressing mechanism is simple in structure and good in adaptability.

Description

Technical Field

[0001] This utility model belongs to the field of looms, and in particular relates to an independent weft insertion nozzle device and a flat knitting machine. Background Technology

[0002] When knitting double-sided weft-inserted fabrics using a flat knitting machine, typically one or two yarns are used to knit the double-sided fabric on the front and back needle beds, while another yarn is used as a float yarn to weave between the two sides. Depending on the properties of the weft yarn, additional functions can be added to the double-sided fabric. Commonly used fine yarns can be fully inserted into the fabric under the action of yarn-pressing components such as sinkers, without affecting the subsequent needle work. However, when thicker elastic tubing is used as a weft yarn in knitting, due to its large diameter and high friction, it will be pulled upwards by the needles when the next row of knitting begins. The unstable yarn floating will cause the elastic tubing, which should be placed between the two sides of the fabric, to float up incorrectly and form loops, which will not only damage the needles but also require manual removal of the elastic tubing and re-knitting. Utility Model Content

[0003] To solve the above-mentioned technical problems, the purpose of this utility model is to provide an independent weft insertion nozzle device with a simple structure that can meet the requirement of using an elastic flexible tube as a weft insertion yarn.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A self-contained weft insertion nozzle device includes a U-shaped seat, a nozzle rod, a yarn guide, a yarn threading component, and a machine head connector. The U-shaped seat is vertically arranged in the left-right direction, and the machine head connector is horizontally arranged on the upper end of the U-shaped seat in the left-right direction, with protruding lugs on both sides of the upper end of the machine head connector. The nozzle rod is vertically arranged in the middle of the lower part of the U-shaped seat, and the upper end of the nozzle rod is connected to the U-shaped seat. The yarn guide is installed in the middle of the nozzle rod, and the yarn threading component... The device is installed at the lower end of the yarn feeder rod, characterized in that it further includes two yarn pressing mechanisms. Both yarn pressing mechanisms are vertically arranged below the sides of the U-shaped seat. The two lugs have sensors at their close ends for sensing whether the machine head is close to or in contact with the machine head. Each sensor corresponds to the yarn pressing mechanism on the opposite side. Both sensors and the two yarn pressing mechanisms are electrically connected to the upper controller of the flat knitting machine. When any sensor senses a signal, the upper controller controls the corresponding yarn pressing mechanism to extend.

[0005] The beneficial effects of the above technical solution are as follows: by setting sensors on the two machine head connectors and setting a yarn pressing mechanism on each side of the lower end of the Us seat, the entire autonomous weft yarn feeding device can be pressed down by the yarn pressing mechanism on the opposite side to prevent it from floating up incorrectly when it moves to the left or right position, thereby protecting the loom.

[0006] The sensing element described in the above technical solution is a proximity switch or a limit switch.

[0007] The advantages of the above technical solution are that it has a simple structure and high sensing sensitivity.

[0008] In the above technical solution, the U-shaped seat is provided with a connecting hole in the middle, and the yarn nozzle rod is provided with a strip-shaped hole along the vertical edge. The strip-shaped hole is aligned with the connecting hole and allows the bolting component to pass through, so as to install the yarn nozzle rod on the U-shaped seat.

[0009] The beneficial effect of the above technical solution is that the vertical installation position of the yarn feeder bar on the U-shaped seat is adjustable, so as to meet the weaving needs of different knitted fabrics.

[0010] In the above technical solution, multiple connecting holes, strip holes, and bolts are provided, and the multiple connecting holes, strip holes, and bolts correspond one-to-one with each other.

[0011] The beneficial effect of the above technical solution is that it makes the yarn feeder rod more stable when installed on the Usu seat, and it is less prone to shaking.

[0012] The yarn guide component described in the above technical solution includes a connecting plate and a yarn guide wheel. The connecting plate is arranged along the left-right direction and installed at the middle part corresponding to the length direction of the yarn feeder rod. The two yarn guide wheels are respectively installed at both ends of the connecting plate, and the axles of the two yarn guide wheels are distributed along the front-back direction.

[0013] The beneficial effect of the above technical solution is that its structure is simple, which allows the weft yarn to be fed from the left or the right as needed.

[0014] The lower end of the yarn threading component described in the above technical solution is provided with a vertically penetrating yarn threading hole.

[0015] The advantages of the above technical solution are that it has a simple structure and allows the weft yarn to be limited by the threading hole.

[0016] The yarn pressing mechanism described in the above technical solution includes an electric telescopic component and a yarn pressing plate. The electric telescopic component is vertically arranged on the corresponding side of the U-shaped seat, with its telescopic end facing downwards. The yarn pressing plate is horizontally arranged and installed on the telescopic end of the electric telescopic component.

[0017] The beneficial effect of the above technical solution is that its structure is simple, which allows the weft yarn to be pressed down by the pressure plate at its lower end by the electric telescopic component to prevent it from floating up incorrectly.

[0018] The electric telescopic component mentioned in the above technical solution is an electric telescopic cylinder.

[0019] The advantages of the above technical solution are that it has a simple structure and a small size.

[0020] In the above technical solution, the lower ends of both sides of the U-shaped base are provided with mounting holes that are recessed upwards, and the upper ends of the two electric telescopic components are embedded in the mounting holes.

[0021] The beneficial effect of the above technical solution is that it can further reduce the space occupied by the electric telescopic component.

[0022] The second objective of this invention is to provide a knitting flat knitting machine with a simple structure that can accommodate elastic flexible tubing as the weft yarn.

[0023] To achieve the above objectives, the technical solution of this utility model is as follows: a flat knitting machine, including the self-inserting weft yarn feeder device as described above.

[0024] The advantages of the above technical solution are that it has a simple structure, a high degree of automation, and can meet the knitting needs of coarser weft yarns. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the self-inserting weft yarn nozzle device described in Embodiment 1 of this utility model;

[0026] Figure 2 This is a bottom view of the Ussor described in Embodiment 1 of this utility model;

[0027] Figure 3 This is a schematic diagram showing the connection between the Uss seat and the yarn feeder rod as described in Embodiment 1 of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the head connector described in Embodiment 1 of this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the flat knitting machine described in Embodiment 2 of this utility model.

[0030] In the diagram: 100, Self-propelled weft yarn feeder device; 1, U-shaped seat; 11, connecting hole; 12, mounting hole; 2, yarn feeder rod; 21, strip hole; 3, yarn guide; 31, connecting plate; 32, yarn guide wheel; 4, yarn threading component; 41, yarn threading hole; 5, machine head connector; 51, lug; 6, yarn pressing mechanism; 61, electric telescopic component; 62, yarn pressing plate; 7, sensing component; 8, bolt; 81, bolt; 82, nut; 200, needle bed; 300, weft yarn. Detailed Implementation

[0031] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will be more clearly described in light of the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0032] Example 1

[0033] like Figure 1 and Figure 4 As shown, this embodiment provides an autonomous weft insertion nozzle device, including a U-shaped seat 1, a nozzle rod 2, a yarn guide 3, a yarn threading component 4, and a machine head connector 5. The U-shaped seat 1 is vertically arranged in the left-right direction, and the machine head connector 5 is horizontally arranged on the upper end of the U-shaped seat 1 in the left-right direction, with lugs 51 protruding from both sides of the upper end of the machine head connector 5. The nozzle rod 2 is vertically arranged in the middle below the U-shaped seat 1, and the upper end of the nozzle rod 2 is connected to the U-shaped seat 1. The yarn guide 3 is installed in the middle of the nozzle rod 2, and the yarn threading component 4 is installed at the lower end of the nozzle rod 2. The device is characterized by further including two yarn pressing mechanisms 6, both of which are vertically arranged below the sides of the U-shaped seat 1. Each of the two lugs 51 has a sensor 7 at one end that is close to each other to sense whether the knitting machine head is close to or in contact with the machine. Each sensor 7 corresponds to the yarn pressing mechanism 6 on the opposite side. Both sensors 7 and the two yarn pressing mechanisms 6 are electrically connected to the upper controller of the knitting machine. When any sensor 7 senses a signal, the upper controller controls the corresponding yarn pressing mechanism 6 to extend. By setting sensors on the two machine head connectors and setting a yarn pressing mechanism on each side of the lower end of the U-shaped seat, the entire autonomous weft yarn feeding device can be pressed down by the yarn pressing mechanism on the opposite side to prevent it from floating up incorrectly when it moves to the left or right position, thereby protecting the loom.

[0034] The sensing element 7 in the above technical solution is a proximity switch or limit switch, which has a simple structure and high sensing sensitivity.

[0035] like Figure 3 As shown, in the above technical solution, the U-shaped seat 1 is provided with a connecting hole 11 in the middle, and the yarn feeder rod 2 is provided with a strip-shaped hole 21 along the vertical edge. The strip-shaped hole 21 is aligned with the connecting hole 11 and allows the fastener 8 to pass through, so as to install the yarn feeder rod 2 on the U-shaped seat 1. This makes the vertical installation position of the yarn feeder rod on the U-shaped seat adjustable, so as to meet the weaving needs of different knitted fabrics.

[0036] In the above technical solution, multiple connecting holes 11, strip holes 21, and bolts 8 are provided, and each of the multiple connecting holes 11, strip holes 21, and bolts 8 corresponds to the other, thus improving the stability of the yarn feeder rod installed on the U-shaped seat and making it less prone to shaking. In this embodiment, two connecting holes, strip holes, and bolts are provided, and they correspond to each other. The two connecting holes are distributed vertically at intervals, and the two strip holes are also distributed vertically at intervals. The bolts include bolts 81 and nuts 82. The aligned connecting holes and strip holes allow one bolt 81 to pass through, and at least one nut 82 is tightened onto the threaded end of the bolt 81.

[0037] The yarn guide 3 described in the above technical solution includes a connecting plate 31 and yarn guide wheels 32. The connecting plate 31 is arranged along the left-right direction and installed at the middle of the yarn feeder rod 2 along its length. The two yarn guide wheels 32 are respectively installed at both ends of the connecting plate 31, and the axles of the two yarn guide wheels 32 are distributed along the front-back direction. Its structure is simple, allowing the weft yarn to be fed from the left or right side as needed. In this embodiment, the yarn guide wheel can be a grooved wheel, which also allows it to limit the movement of the weft yarn.

[0038] The lower end of the yarn threading component 4 described in the above technical solution is provided with a vertically penetrating yarn threading hole 41, which has a simple structure and allows the weft yarn to be limited by the yarn threading hole.

[0039] like Figure 1 As shown, the yarn pressing mechanism 6 in the above technical solution includes an electric telescopic component 61 and a yarn pressing plate 62. The electric telescopic component 61 is vertically arranged on the corresponding side of the U-shaped seat 1, with its telescopic end facing downwards. The yarn pressing plate 62 is horizontally arranged and installed on the telescopic end of the electric telescopic component 61. Its structure is simple, allowing the weft yarn to be pressed down by the electric telescopic component via the lower yarn pressing plate to prevent it from erroneously floating upwards. In this embodiment, the yarn pressing plate is a circular plate, and it is coaxially connected to the telescopic end of the electric telescopic component.

[0040] The electric telescopic component 61 described in the above technical solution is an electric telescopic cylinder, which has a simple structure and small size. In this embodiment, the electric telescopic component is electrically connected to the controller.

[0041] like Figure 2 As shown, in the above technical solution, the lower ends of both sides of the U-shaped base 1 are provided with mounting holes 12 that are recessed upwards, and the upper ends of the two electric telescopic components 61 are embedded in the mounting holes 12, which can further reduce the space occupied by the electric telescopic components.

[0042] The autonomous weft insertion nozzle device provided in this embodiment is designed to meet normal weaving needs by using an elastic flexible tube as the weft insertion yarn to insert into double-sided fabric, ensuring the integrity and aesthetics of the fabric surface, while saving manual operation time.

[0043] In this embodiment, the knitting head connector can be integrally formed with the U-shaped seat, and the U-shaped seat is slidably mounted on the slide bar of the flat knitting machine. The knitting head of the flat knitting machine is located between the two lugs. The knitting head of the flat knitting machine moves left and right to drive the autonomous weft insertion nozzle device to move left and right (when the knitting head moves to the left and abuts against the lug on the left, the left sensor can sense the signal of the arrival of the knitting head. Similarly, when the knitting head moves to the right and abuts against the lug on the right, the right sensor can sense the signal of the arrival of the knitting head).

[0044] Example 2

[0045] like Figure 5 As shown, this embodiment provides a flat knitting machine, including the autonomous weft insertion nozzle device as described in Embodiment 1. It has a simple structure and a high degree of automation, while also meeting the knitting needs of thicker weft insertion yarns. The flat knitting machine has two needle beds 200, both arranged in the left-right direction and spaced apart in the front-back direction. The autonomous weft insertion nozzle device is located above the two needle beds. When the weft insertion yarn is pressed down, the pressing mechanism presses the weft insertion yarn 300 down to a position slightly below the two needle beds. The weft insertion yarn is guided downwards by a guide roller to pass through the threading hole and under any pressing plate.

[0046] The operating principle of the flat knitting machine provided in this embodiment is as follows:

[0047] Initially, when the sensor on either side of the knitting head connector detects the approach or contact of the knitting head, the controller of the flat knitting machine will control both pressing mechanisms to retract, causing the two pressing plates to move up to a position above the yarn feed hole. This ensures that the needle operation is not affected during normal knitting. After the pressing mechanism passes the position of the first needle in the pressing area of ​​the process design, the controller will send a command to the pressing mechanism on the opposite side to drive the corresponding pressing plate to move down below the bottom of the yarn feeder hole. At this time, because the needle is in a horizontal position where it does not extend when the self-inserting weft feeder device is working, the pressing mechanism can smoothly insert the elastic tube between the two layers of fabric. When the pressing mechanism passes the position of the first needle in the pressing area of ​​the process design... After the last needle in the pressing area is in position, the controller sends a command to the pressing mechanism on the opposite side, specifically driving the pressing plate to move up to reset so that other yarn feeders can weave normally (in short, when the machine head drives the autonomous weft feeder device to move to the left, the pressing mechanism on the right is in an extended state from the position of the first needle in the pressing area in the process design to the last needle, and similarly, the pressing mechanism on the left is always in a retracted state. When the machine head drives the autonomous weft feeder device to move to the right, the pressing mechanism on the left is in an extended state from the position of the first needle in the pressing area in the process design to the last needle, while the pressing mechanism on the right is always in a retracted state).

[0048] The telescopic length of the electric telescopic component must be sufficient to ensure that the bottom of the pressing plate is 2-3mm away from the tip of the knitting needle during the pressing operation, so that the elastic tube can be pressed into the double-sided fabric. If the distance is too large, it may damage the double-sided fabric, and if the distance is too small, the elastic tube may not be able to be pressed into the fabric.

[0049] The size of the yarn pressing mechanism needs to be controlled to prevent the yarn pressing plate from hitting the yarn nozzle during the lifting and lowering process; and the width of the yarn pressing plate in the front and back direction should not be between the two needle beds, usually between 1-2mm.

[0050] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. An autonomous weft insertion nozzle device, comprising a U-shaped seat (1), a nozzle rod (2), a yarn guide (3), a yarn threading component (4), and a machine head connector (5), wherein the U-shaped seat (1) is vertically arranged in the left-right direction, the machine head connector (5) is horizontally arranged at the upper end of the U-shaped seat (1) in the left-right direction, and both sides of the upper end of the machine head connector (5) are provided with lugs (51), the nozzle rod (2) is vertically arranged in the middle of the lower part of the U-shaped seat (1), the upper end of the nozzle rod (2) is connected to the U-shaped seat (1), the yarn guide (3) is installed in the middle of the nozzle rod (2), and the yarn threading component (4) is installed at the lower end of the nozzle rod (2), characterized in that, It also includes two yarn pressing mechanisms (6), both of which are vertically arranged below the sides of the U-shaped seat (1). The two lugs (51) have sensors (7) at their ends that are close to each other to sense whether the machine head is close to or in contact with the machine head. Each sensor (7) corresponds to the yarn pressing mechanism (6) on the opposite side. Both sensors (7) and the two yarn pressing mechanisms (6) are electrically connected to the upper controller of the flat knitting machine. When any sensor (7) senses a signal, the upper controller controls the corresponding yarn pressing mechanism (6) to extend.

2. The self-contained weft insertion nozzle device according to claim 1, characterized in that, The sensing element (7) is a proximity switch or a limit switch.

3. The self-contained weft insertion nozzle device according to claim 1, characterized in that, The U-shaped seat (1) has a connecting hole (11) in the middle, and the yarn nozzle rod (2) has a strip hole (21) along the vertical direction. The strip hole (21) is aligned with the connecting hole (11) and allows the bolting member (8) to pass through, so as to install the yarn nozzle rod (2) on the U-shaped seat (1).

4. The self-contained weft insertion nozzle device according to claim 3, characterized in that, Multiple connecting holes (11), strip holes (21), and bolts (8) are provided, and the multiple connecting holes (11), strip holes (21), and bolts (8) correspond to each other one by one.

5. The self-contained weft insertion nozzle device according to claim 1, characterized in that, The yarn guide (3) includes a connecting plate (31) and a yarn guide wheel (32). The connecting plate (31) is arranged in the left-right direction and installed in the middle of the yarn mouth rod (2) in the length direction. The two yarn guide wheels (32) are respectively installed at both ends of the connecting plate (31), and the axles of the two yarn guide wheels (32) are distributed in the front-back direction.

6. The self-contained weft insertion nozzle device according to claim 1, characterized in that, The lower end of the threading component (4) is provided with a vertical through threading hole (41).

7. The self-contained weft insertion nozzle device according to claim 1, characterized in that, The yarn pressing mechanism (6) includes an electric telescopic component (61) and a yarn pressing plate (62). The electric telescopic component (61) is vertically arranged on the corresponding side of the Uss seat (1) with its telescopic end facing downward. The yarn pressing plate (62) is horizontally arranged and installed on the telescopic end of the electric telescopic component (61).

8. The self-contained weft insertion nozzle device according to claim 7, characterized in that, The electric telescopic component (61) is an electric telescopic cylinder.

9. The self-contained weft insertion nozzle device according to claim 7, characterized in that, The lower ends of both sides of the Uss seat (1) are provided with mounting holes (12) that are recessed upwards, and the upper ends of the two electric telescopic components (61) are embedded in the mounting holes (12).

10. A flat knitting machine, characterized in that, Includes the self-inserting weft yarn feeder device as described in any one of claims 1-9.

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