CN107164878B

CN107164878B - Broken needle detection mechanism of circular knitting machine

Info

Publication number: CN107164878B
Application number: CN201710524146.XA
Authority: CN
Inventors: 林彬彬; 刘明举
Original assignee: Fujian Baoxiang Knitting Technology Co ltd
Current assignee: Fujian Baoxiang Knitting Technology Co ltd
Priority date: 2017-06-30
Filing date: 2017-06-30
Publication date: 2022-09-13
Anticipated expiration: 2037-06-30
Also published as: CN107164878A

Abstract

The invention relates to a broken needle detection mechanism of a knitting circular weft knitting machine, which is arranged on a cam of a saddle and comprises a pin arranged on the cam, a swinging piece rotatably arranged on the free end of the pin, a sensor arranged on the saddle and a return spring arranged on the saddle, wherein the free end of the return spring is connected with the swinging piece, the swinging piece is arranged in the cam and is positioned below a needle butt of a knitting needle, when the knitting needle moves up and down, the needle butt can be in contact with the swinging piece and presses the swinging piece to rotate, and when the swinging piece swings, the sensor can be triggered.

Description

Broken needle detection mechanism of circular knitting machine

Technical Field

The invention relates to a broken needle detection mechanism of a circular knitting machine.

Background

Knitting circular knitting machines are equipped with a large number of needles which, subject to a certain degree of wear, can easily break. Circular knitting machines are often used for high-volume continuous production. If the needles are broken, defects are caused in the produced fabric, resulting in waste. The needle breakage can occur again and is a non-predictive, unpredictable occurrence, and therefore the monitoring of the needles of the operating knitting machine, i.e. the needle breakage detection, is an indispensable and important component thereof, which plays a crucial role in improving the product quality and reducing the defective and defective products.

The conventional grating broken needle detection device in the market is influenced by reasons such as environmental light interference or pollution of flying cotton impurities to a detection lens due to the fact that a needle hook of a knitting needle shakes during the motion process when the conventional grating broken needle detection device is installed and detects fine needle pitch and high-speed response, so that the grating detection device cannot accurately detect completely, and the false alarm is easily caused frequently.

Disclosure of Invention

The invention aims to provide a broken needle detection mechanism of a knitting circular weft, which has a stable structure and can effectively monitor broken needles.

In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a broken needle detection mechanism of knitting circular knitting machine, on its triangle of locating the saddle, including locating pin on the triangle, rotationally locate the swing piece on the pin free end, locate the sensor on the saddle, locate the reset spring on the saddle, the swing piece is connected to reset spring's free end, the swing piece is located in the triangle, just the swing piece is located the below of the butt of knitting needle, and when the knitting needle up-and-down motion, the butt can just oppress the swing piece with swing piece contact and rotate, and when the swing piece swings, can trigger the sensor.

Preferably, a sleeve is arranged on the saddle, the sensor is arranged in the sleeve, and a bolt for locking the sensor is arranged on the sleeve.

Preferably, when the return spring and the swinging piece are in a static state, the upper end surface of the swinging piece is inclined.

The technical scheme has the following beneficial effects: the broken needle detection mechanism of the circular knitting machine realizes stable signal output through mechanical motion, thereby realizing accurate broken needle detection, has simple structure and lower cost, is simpler to maintain and repair, is mainly arranged through the change of the motion state of a knitting needle during actual production and the motion state after breakage, can move downwards after breakage through the knitting needle, bears the downward movement of the knitting needle through the swing of the swing sheet, and the swing of the swing sheet can enter the detection range of a sensor, thereby transmitting the breakage state of the knitting needle to a computer host to send out a signal, and can reset the swing sheet through a reset spring, namely, the mechanism can normally operate after the knitting needle is replaced; furthermore, the distance between the sensor and the swinging sheet can be adjusted by arranging the sleeve and the bolt; furthermore, when the return spring and the swinging piece are in a static state, the upper end surface of the swinging piece is inclined, so that the swinging of the swinging piece can be more smoothly realized.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view showing the state of the detecting mechanism for detecting the broken needle of the circular knitting machine when the knitting needle is intact;

FIG. 3 is a schematic view showing the state of the detecting mechanism for detecting the broken needle of the circular knitting machine when the knitting needle is damaged;

FIG. 4 is a schematic view of the structure of the needle with the swing plate engaged with the butt;

fig. 5 is a schematic structural view of the matching of the swing blade and the needle butt when the knitting needle is damaged.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, the present embodiment provides a broken needle detection mechanism for a circular knitting machine, which is disposed on a cam 2 of a saddle 1, and includes a pin 6 disposed on the cam 2, a swing plate 7 rotatably disposed on a free end of the pin 6, a sleeve 4 disposed on the saddle 1, a sensor 5 disposed in the sleeve 4, and a return spring 8 disposed on the saddle 1, wherein the sleeve 4 is provided with a bolt 41 for locking the sensor 5, a notch 71 is disposed on a lower hem of the swing plate 7, a free end of the return spring 8 is connected to the notch 71 of the swing plate 7, a through hole 21 communicated with a track 22 is disposed in the cam 2, the swing plate 7 is disposed in the through hole 21 of the cam 2, and the swing plate 7 is disposed below a butt 31 of a knitting needle 3, when the knitting needle 3 moves up and down, the butt 31 can contact with the swing plate 7 and press the swing plate 7 to rotate, and when the swing plate 7 swings, the sensor 5 can be triggered. When the return spring 8 and the swinging piece 7 are in a static state, the upper end surface of the swinging piece 7 is inclined.

The knitting needle 3 has downward inertia acting force in the downward needle pressing and yarn bending motion, and referring to fig. 2 and 4, in normal knitting, the needle butt 31 moves along the upper part of the track 22 of the triangle 2 under the acting force such as the tension of the yarn 9; referring to fig. 3 and 5, in a state that the needle hook is damaged and does not hook the yarn 9, the needle butt 31 'moves along a track below the track 22 of the cam 2 due to inertia acting force, at this time, the needle butt 31' contacts the upper part of the swinging piece 7, the swinging piece 7 rotates, the lower part enters the range of the sensor 5, and the sensor 5 generates a signal and sends a warning signal to a computer host.

The saddle, the triangle and the butt are all conventional structures in the field, and the specific structural form can be seen in the Chinese patent previously disclosed by the applicant: 201120252853.6, see also other prior patents related to the present applicant.

The above is only a preferred embodiment of the invention and all equivalent modifications made by those skilled in the art according to the claims fall within the scope of the present invention.

Claims

1. The utility model provides a broken needle detection mechanism of knitting circular weft knitting machine, its triangle of locating the saddle on, its characterized in that: including locating pin on the triangle, rotationally locate the swing piece on the pin free end, locate the sensor on the saddle, locate reset spring on the saddle, swing piece is connected to reset spring's free end, swing piece is located in the triangle, just swing piece is located the below of the butt of knitting needle, and when the knitting needle up-and-down motion, the butt can just oppress the swing piece with swing piece contact and rotate, and when swing piece swing, can trigger the sensor.

2. The broken needle detection mechanism of the circular knitting machine according to claim 1, characterized in that: the saddle is provided with a sleeve, the sensor is arranged in the sleeve, and the sleeve is provided with a bolt for locking the sensor.

3. The broken needle detection mechanism of the circular knitting machine according to claim 1, characterized in that: when the return spring and the swinging piece are in a static state, the upper end surface of the swinging piece is inclined.