Needle detection device for circular knitting machine

Abstract

The utility model relates to a needle detection device for a circular knitting machine. The needle detection device comprises a needle cylinder, an upper triangular body, a knitting needle, a magnetic attraction assembly and a needle detection assembly. The needle cylinder and the upper triangular body are coaxially arranged, and a needle groove used for installing a knitting needle is formed in the side, facing the upper triangular body, of the needle cylinder. The magnetic attraction assembly and the needle detection assembly are installed on the outer side of the upper triangular body in the circumferential direction, and the magnetic attraction assembly and the needle detection assembly are sequentially arranged in the rotating direction of the needle cylinder. The magnetic attraction assembly is arranged on one side of the needle detection assembly, when a needle hook of the knitting needle is accidentally broken and loses acting force, the needle hook can be attracted by the magnetic attraction assembly to a certain height, compared with other knitting needles which are not attracted, the needle hook is more easily detected by the needle detection assembly, and the ability of detecting the bad needle is greatly improved; meanwhile, the whole device is simpler in structure and more accurate in detection result.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile machinery, in particular to a needle detection device for a circular knitting machine. BACKGROUND

[0002] The circular knitting machine is a high-end knitting machine, which has the advantages of high production per unit of time and high product grade. A large number of knitting needles are assembled on the circular knitting machine. The knitting needles often break during long-term use. If the broken needles are not removed in time or the circular knitting machine is not stopped, it will cause defects and damage to the cloth. Therefore, the broken needles must be detected in time and accurately.

[0003] At present, the detection of broken needles is realized by installing a needle detection assembly on the circular knitting machine. The needle detection assembly is provided with a probe or a metal wire, which can detect whether the knitting needles at the corresponding position are at the same height. When the height of the knitting needles passing through the needle detection assembly is abnormal, the needle detector will trigger an alarm signal to control the circular knitting machine to stop working, and the staff can remove or replace the broken needles in time to avoid damage to the cloth. However, in actual production, when the knitting needle hook breaks, the position of the needle body changes slightly, which will cause the needle detection assembly to fail to detect the broken needles in time, and when the abnormality is found, the cloth has already been damaged in a large area.

[0004] Therefore, there is an urgent need for a needle detection device that can detect broken needles in time and efficiently to avoid damage to the cloth. CONTENT OF THE INVENTION

[0005] The present application aims to provide a needle detection device for a circular knitting machine to solve the problems in the background art.

[0006] The embodiments of the present application can be realized by the following technical solutions:

[0007] A needle detection device for a circular knitting machine, comprising a needle cylinder, an upper triangle body, a magnetic attraction assembly, a needle detection assembly and knitting needles. The upper triangle body and the needle cylinder are coaxially arranged. The needle cylinder is provided with a needle groove on one side facing the upper triangle body for installing the knitting needles. The magnetic attraction assembly and the needle detection assembly are installed on the circumferential outer side of the upper triangle body, and the magnetic attraction assembly and the needle detection assembly are arranged in sequence along the rotation direction of the needle cylinder.

[0008] Further, the magnetic attraction assembly comprises a magnet bracket and a magnetic element. The magnet bracket is connected to the circumferential outer side of the upper triangle body, and the magnetic element is installed on one end of the magnet bracket close to the needle cylinder provided with the needle groove. The magnetic element is located between the magnet bracket and the knitting needle.

[0009] Further, the magnet support is in L-shaped structure, which comprises a first flat plate and a second flat plate connected with each other, the first flat plate is connected to the outer side of the circumference of the upper cam, and the second flat plate is connected to one end of the first flat plate close to the knitting needle, and one side of the second flat plate close to the knitting needle is connected with the magnetic element.

[0010] Further, the first flat plate is provided with a long hole in the radial direction of the upper cam.

[0011] Further, the first flat plate and the second flat plate are arranged perpendicularly to each other.

[0012] Further, the magnet support is made of non-magnetic material.

[0013] Further, the knitting needle is arranged along the radial direction of the upper cam and arranged in the needle groove, and the needle hook of the knitting needle is arranged towards the outer side of the circumference of the upper cam.

[0014] Further, the needle detection assembly comprises a needle detector, a broken needle detector, and a controller, the needle detector and the broken needle detector are electrically connected, and the needle detector and the controller are electrically connected.

[0015] The embodiment of the present application provides a needle detection device for a circular knitting machine, which has at least the following beneficial effects:

[0016] 1. The present application sets a magnetic attraction assembly on one side of the needle detection assembly, when the needle hook is accidentally broken, it will be attracted to a certain height by the magnetic attraction assembly, and it is easier to be detected by the needle detection assembly than other knitting needles that are not attracted, which greatly improves the ability to detect broken needles; at the same time, the whole device structure is simpler, and the detection result is more accurate.

[0017] 2. The present application sets a long hole in the radial direction of the upper cam on the magnet support and extends along the axial direction of the upper cam, which is convenient for fixing the magnet support on the upper cam and adjusting the vertical height of the magnet support connected to the upper cam, and then adjusting the distance between the magnetic element and the knitting needle. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional structure schematic diagram of the needle detection device;

[0019] Figure 2 It is a three-dimensional structure schematic diagram of the magnetic attraction assembly;

[0020] Figure 3 It is a structure schematic diagram of the knitting needle when it is not attracted by the magnetic element;

[0021] Figure 4This is a schematic diagram of the structure when a knitting needle is attracted by a magnetic element.

[0022] Reference numerals: 1-Upper triangular body, 2-Magnetic suction assembly, 21-Magnetic support, 211-First plate, 212-Second plate, 213-Elongated hole, 22-Magnetic element, 31-Damaged needle detector. Detailed Implementation

[0023] The present application will now be further described based on preferred embodiments and with reference to the accompanying drawings.

[0024] The vocabulary used in this specification is for illustrative purposes and is not intended to limit the scope of this application. Unless otherwise expressly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection via an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of these terms in this application.

[0025] Furthermore, in the description of the embodiments of this application, various components on the drawings have been enlarged or reduced for ease of understanding, but this is not intended to limit the scope of protection of this application.

[0026] Please see Figure 1 This application provides a technical solution: a needle detection device for a circular knitting machine, comprising a needle cylinder, an upper triangular body 1, knitting needles, a magnetic suction assembly 2, and a needle detection assembly; the upper triangular body 1 is coaxially arranged with the needle cylinder; the needle cylinder has a needle groove on the side facing the upper triangular body 1 for mounting the knitting needle; the knitting needle includes a needle hook, a needle body, and a needle foot, the needle hook hooks the yarn so that the yarn applies a tension to the knitting needle, and the needle foot cooperates with the triangular track of the upper triangular body 1, so that the knitting needle reciprocates within the needle groove during the rotation of the needle cylinder; the magnetic suction assembly 2 and the needle detection assembly are installed on the circumferential outer side of the upper triangular body 1, and the magnetic suction assembly 2 and the needle detection assembly are arranged sequentially along the rotation direction of the needle cylinder. When the circular knitting machine starts working, the rotating cylinder will carry the knitting needles in a circular motion. The needles will first pass through the area covered by the magnetic suction component 2, which will pick up the damaged needles and lift them to a certain height. Then, when the needles pass through the area covered by the needle detection component, the damaged needles will be detected, triggering an alarm signal. The cylinder structure is known prior art in this field and is therefore not shown in the accompanying drawings.

[0027] Please see Figure 2The magnetic component 2 includes a magnet bracket 21 and a magnetic element 22. The magnetic element 22 is installed on the end of the magnet bracket 21 near the needle cylinder where the needle groove is provided, so that the magnetic element 22 is located between the magnet bracket 21 and the knitting needle. The magnetic element 22 will generate a magnetic force on the knitting needle, but the magnetic force will be less than the tension of the yarn on the knitting needle, so it will not cause the knitting needle to change position.

[0028] Specifically, the magnet support 21 is preferably an L-shaped structure, but not limited to it. The L-shaped structure includes a first plate 211 and a second plate 212 connected to each other. The first plate 211 is connected to the outer side of the upper triangular body 1 in the circumferential direction. The second plate 212 is connected to the end of the first plate 211 near the knitting needle. The magnetic element is connected to the side of the second plate 212 facing the knitting needle, which facilitates the attraction of the magnetic element 22 to the broken needle.

[0029] Specifically, the first plate 211 has an elongated hole 213 along the radial direction of the upper triangular body 1. The elongated hole 213 is stretched along the axial direction of the upper triangular body 1 to facilitate fixing the magnet bracket 21 to the upper triangular body 1. The elongated hole 213 can adjust the vertical height of the magnet bracket 21 connected to the upper triangular body 1, thereby adjusting the distance between the magnetic element 22 and the knitting needle.

[0030] Specifically, the magnet support 21 is made of a non-magnetic material, preferably aluminum but not limited to, to avoid the phenomenon of magnetization of the machine's metal parts.

[0031] Specifically, the knitting needles are installed in the needle groove and arranged radially and centripetally along the upper triangular body 1, and the knitting hooks face the circumferential outer side of the upper triangular body 1, so that the magnetic suction assembly 2 and the needle detection assembly can detect damaged knitting needles along the rotation direction of the needle cylinder.

[0032] Specifically, the needle detection assembly includes a needle detector, a bad needle detector 31, and a controller; the needle detector and the bad needle detector 31 are electrically connected, and the needle detector and the controller are also electrically connected; after the bad needle detector 31 detects a bad needle attracted by the magnetic component 2, it triggers the needle detector, and then the needle detector sends an alarm signal to the controller to stop the circular knitting machine from working. The needle detector and the controller are known prior art and are not shown in the accompanying drawings.

[0033] Working principle: First, the magnetic suction assembly 2 and the needle detection assembly are fixed on the outer circumference of the upper triangular body 1, and the magnetic suction assembly 2 and the needle detection assembly are arranged sequentially along the rotation direction of the syringe. The bad needle detector 31 in the needle detection assembly will have a preset position (e.g., Figure 3As shown), this position can detect whether the position of the knitting needle is abnormal; then the circular knitting machine is started to work, the cylinder will drive the knitting needle to make a circular motion, the magnetic attraction component 2 and the needle detection component can detect the knitting needle installed on the needle slot. The knitting needle will first enter the area covered by the magnetic attraction component 2, and then enter the area covered by the needle detection component; during the production process, the needle hook will hook the yarn, at which time the knitting needle will be subjected to the tension from the yarn. This tension will be much greater than the magnetic force of the magnetic attraction component 2 on the knitting needle, thus ensuring that the knitting needle will not be attracted by the magnetic attraction component 2 to lift up, and the knitting needle will not change position; however, when the needle hook of the knitting needle breaks due to an accident, the bad needle will lose the force from the yarn, and will then be attracted by the magnetic force of the magnetic attraction component 2, and the bad needle will be slightly lifted to a certain height; at this time, the bad needle detector 31 can detect the presence of the bad needle (e.g. Figure 4 As shown in the image, this triggers the needle detector to send an alarm signal to the controller, which then stops the circular knitting machine. The staff can then go to the vicinity of the needle detection assembly to remove and replace the faulty needle in time to avoid fabric loss.

[0034] The specific embodiments of this application have been described in detail above. For those skilled in the art, several improvements and modifications can be made to this application without departing from the principle of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A needle detection device for a circular knitting machine, comprising a needle cylinder, an upper triangular body (1), a magnetic suction assembly (2), a needle detection assembly, and knitting needles; wherein the upper triangular body (1) and the needle cylinder are coaxially arranged, and the needle cylinder has a needle groove for mounting the knitting needles on one side facing the upper triangular body (1), characterized in that: The magnetic suction assembly (2) and the needle detection assembly are installed on the circumferential outer side of the upper triangular body (1), and the magnetic suction assembly (2) and the needle detection assembly are arranged sequentially along the rotation direction of the syringe.

2. The needle detection device for a circular knitting machine according to claim 1, characterized in that: The magnetic assembly (2) includes a magnet bracket (21) and a magnetic element (22). The magnet bracket (21) is connected to the circumferential outer side of the upper triangular body (1). The magnetic element (22) is installed at one end of the magnet bracket (21) near the needle cylinder. The magnetic element (22) is located between the magnet bracket (21) and the knitting needle.

3. A needle detection device for a circular knitting machine according to claim 2, characterized in that: The magnet support (21) has an L-shaped structure, which includes a first plate (211) and a second plate (212) connected to each other. The first plate (211) is connected to the outer side of the upper triangular body (1) in the circumferential direction, and the second plate (212) is connected to the end of the first plate (211) near the knitting needle. The magnetic element (22) is connected to the side of the second plate (212) facing the knitting needle.

4. A needle detection device for a circular knitting machine according to claim 3, characterized in that: The first plate (211) has an elongated hole in the radial direction of the upper triangular body (1), and the elongated hole (213) is stretched in the axial direction of the upper triangular body (1).

5. A needle detection device for a circular knitting machine according to claim 3, characterized in that: The first plate (211) and the second plate (212) are arranged perpendicular to each other.

6. A needle detection device for a circular knitting machine according to claim 2, characterized in that: The magnet holder (21) is made of a non-magnetic material.

7. A needle detection device for a circular knitting machine according to claim 1, characterized in that: The knitting needles are installed in the needle groove and arranged radially and centripetally along the upper triangle (1), with the needle hooks facing outwards circumferentially from the upper triangle (1).

8. A needle detection device for a circular knitting machine according to claim 1, characterized in that: The needle detection assembly includes a needle detector, a bad needle detector (31), and a controller. The needle detector and the bad needle detector (31) are electrically connected, and the needle detector and the controller are electrically connected.

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