JPH0220236Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a thread cutting device for flat knitted fabrics.

<Prior Art> Narrow rubber knitted fabrics to be sewn to the collar, cuffs, and hem of a sweater are knitted into a series of fabrics by cutting out rubber knitted fabrics of a predetermined width using a flat knitting machine and intertwining them with threads.

In the fabric knitted in this way, the thread parts at both ends of the rubber knitted fabric are connected by threads, and care is taken to prevent the threads from getting entangled with each other during the post-processing process of dyeing and processing the fabric. It was necessary to cut the threads located on the sides of the rubber knitted fabric.

Conventionally, the fabric was folded into a cloth shape, and the threads were picked up one by one and cut with scissors.

<Problems to be solved by the invention> The conventional thread cutting method described above has the following problems.

(1) First, it is necessary to allocate workers exclusively for cutting work, which increases manufacturing costs.

(2) Moreover, since the threads to be cut are thin and the number of threads is very large, the cutting work takes time and effort, and the work efficiency is low.

(3) In addition, since the threads to be cut are thin and the number of threads is very large, there is a high possibility that they may be overlooked, which may cause problems in the post-processing process.

The present invention was proposed in view of the above-mentioned problems, and it is an object of the present invention to provide a device that can reliably cut the threads with a simple device.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a cutting timing detecting means, a pulling means for pulling the drawn thread based on a cutting timing detection signal of the cutting timing detecting means, and a pulling means. and a cutting means for cutting the pulled thread pulled by the pulling means, and the cutting means is configured to be driven after the pulling means is activated.

<Function> First, the cutting timing detection means detects the cutting position of the pulled thread and outputs a timing signal.

Next, the pulling means is activated based on the timing signal output from the cutting timing detecting means, and the pulled thread is pulled.

In this way, the drawn thread pulled by the pulling means is reliably cut by the operation of the cutting means.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

The drawing is a partially exploded perspective view of a drawing thread cutting device for flat knitted fabrics according to the present invention, and reference numeral 1 in the drawing generally indicates the drawing thread cutting device.

This thread cutting device 1 is for cutting threads 3 that continuously connect knitted fabrics 1 knitted into narrow widths by a flat knitting machine (not shown), and includes a cutting timing detecting means 4 and a cutting timing detecting means. 4, a cutting means 6 that cuts the drawn thread 3 drawn by the pulling means 5, and a pulling means 5 that operates based on the detection signal of the cutting timing detecting means 4. and a control means 7 for controlling the operation of the cutting means 6.

The cutting timing detecting means 4 is a dobby (not shown) that rotates once for each width of the knitted fabric 2.
It consists of two cam plates 8a, 8b which are attached at different operating timings, and limit switches 9a, 9b which are actuated by these cam plates 8a, 8b and output cutting timing detection signals.

A pulling means 5 for pulling the pulled thread 3
consists of a pulling solenoid 10, a hook 11 fixed to the tip of a spool 10a of the pulling solenoid 10, and a compression coil spring 12 that always biases the hook 11 to project to a standby position.

The cutting means 6 includes a pulling solenoid 10
One handle portion 13a is attached to the upper surface of the casing 10b.
Japanese scissors 13 to which are fixed, a cutting solenoid 14 provided orthogonally to the drawing solenoid 10, and a spool 1 of the cutting solenoid 14 that is biased to protrude to a standby position by a return spring 15.
It consists of an "L" shaped metal fitting 16 for operating the Japanese scissors 13 attached to the tip of the scissors 4a.

Further, the control means 7 controls the commercial current supplied from the outlet 19 to the limit switches 9a, 9.
A relay (not shown) that first supplies power to the pulling solenoid 10 based on the disconnection timing detection signal from b, and a relay (not shown) that subsequently supplies power to the disconnection solenoid 14 are housed in a box 17. There is.

Next, the operation of the weft knitted fabric thread cutting device 1 configured as described above will be explained.

First, a knitted fabric 2 of a predetermined width is woven by a flat knitting machine using a dobby, with its upper and lower ends being drawn out and connected by threads 3 to form a series of fabrics 18 like a band.

In this way, the drawn threads 3 of the woven fabric 18 are connected to each other on one side of the knitted fabric 2, that is, on the side where the drawn thread cutting device 1 is provided.

Then, when the limit switch 9a is activated by one of the plate cams 8a and 8b that moves in accordance with the weaving of the knitted fabric 2 and a cutting timing signal is output, the control means 7 pulls the cutting timing signal based on this signal. When commercial current is supplied to the solenoid 10, the spool 10a is compressed by the coil spring 1.
Pull against 2.

When the spool 10a is pulled in, the hook 11 at its tip hooks the drawn thread 3 on the side of the knitted fabric 2 and draws it into the cutting edge of the Japanese scissors 13.

Next, when one plate cam 8a and the other plate cam 8b operate the limit switch 9b,
In response to the timing signal from the limit switch 9b, a commercial current is supplied from the control means 7 to the cutting renoids 14, and the spool 14a is drawn against the compression coil spring 15.
An "L" shaped metal fitting 16 formed at the tip of the thread 4a operates the Japanese scissors 13 to cut the thread 3.

Therefore, the threads 3 are reliably cut one by one each time.

In the above embodiment, the cutting timing detection means 4
two cam plates 8a, 8b installed with different operating timings, and limit switches 9a, 9.
b, but instead of this, the cutting solenoid 14 may be operated based on the operation of the pulling solenoid 10, or the cutting solenoid 14 may be operated by pinching the woven fabric 18. It is also possible to configure the cutting timing to be detected by providing a light emitting element and a light receiving element in the open state and detecting the difference between the light transmittance of the two parts of the knitted fabric and the light transmittance of the three parts of the drawn thread.

Moreover, the cutting means 6 can be replaced with Japanese scissors 13 and can also be replaced with a knife or a cutter. In this case, the thread 3 can be cut at the same time when it is pulled by the pulling means 5, so the cutting solenoid 1
4 can be omitted.

In addition, each solenoid 10, 14 of the above embodiment
It goes without saying that it can also be constructed with a hydraulic or pneumatic cylinder.

<Effects of the Invention> The present invention is constructed and operates as described above, and thus has the following effects.

(1) First, in the cutting operation, the thread is cut by the interlocking of the cutting timing detection means, the pulling means, and the cutting means, so there is no need to assign a worker exclusively for the cutting operation, which reduces personnel costs. This can reduce manufacturing costs.

(2) Moreover, since the drawn thread is cut each time during weaving, the time dedicated to cutting work can be omitted, and productivity can be improved accordingly.

(3) In addition, the threads to be cut are cut each time during weaving, so even if the number of threads to be cut is thin and there are a large number, there will be no forgetting to cut them.
This can reliably prevent problems from occurring in the post-processing process.

[Brief explanation of the drawing]

The drawing is a partially exploded perspective view of a thread cutting device for flat knitted fabrics according to the present invention. 3... Thread removal, 4... Cutting timing detection means, 5... Pulling means, 6... Cutting means.

Claims (1)

[Scope of utility model registration request] The cutting means has a cutting timing detection means, a drawing means for drawing the drawn thread based on a cutting timing detection signal of the cutting timing detection means, and a cutting means for cutting the drawn thread drawn by the drawing means, and the drawing means for pulling the cutting means. A thread cutting device for a flat knitted fabric, characterized in that it is configured to be driven after the operation of the device.