JPS636149A - Apparatus for stopping tufted machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a stopping device for a tufting machine for producing tufted carpets.

[Conventional technology]

In recent years, tufted machines have been operated at fairly high speeds, and if thread cutter detection personnel were to turn off the switch after discovering a thread breakage, this would result in long scratches on the product, resulting in various stoppages. Equipment is attached.

A first conventional example is a phototube type stop device. This stopping device includes the second thread guide 21 and the third thread guide, as shown in FIG.
Below the pile yarn Y, which passes in an inclined manner between the yarn guide 22 and the yarn guide 22, a light beam emitted from a light source installed at one end of the machine base is received by a phototube 23 at the other end, and the pile yarn Y is cut. When the yarn hangs down from the second yarn guide 21 (see the direction of the arrow in FIG. 11), the light beam is temporarily blocked and the phototube mill senses this, causing the main drive shaft to stop.

A second conventional example is a laser beam stop device. This stopping device, as shown in FIG.
A laser beam 26 is emitted from a laser generator 25 into the gap where the needle N moves up and down along the upper surface, and a sensing device (not shown) that receives this laser beam 26 detects changes in the laser beam. If there is no pile yarn Y at N, this will be detected and the machine will stop.

A third conventional example is a test-type stopping device. As shown in FIG. 13, this stopping device projects light emitted from a light source section 27 onto the entire width of the back surface of the base fabric 24 of the carpet after tufting, and this reflected light is received by a photoelectric element in an inspection section 28. The machine will stop when it detects a scratch.

[Problem that the invention seeks to solve]

However, in the first conventional phototube type stop device,
Pile yarns come into contact with each other while running and are charged with static electricity, and even if the yarn breaks, it often attracts adjacent yarns and does not hang from the yarn guide and cannot be detected by the phototube 23. There were problems such as cotton shavings falling off the threads adhering to them and blocking the light beam, causing malfunctions.

In the second conventional laser beam stopping device, since the laser beam 26 is located 2 to 3 mm above the base fabric,
Vibration of the base fabric during high-speed operation and lint on the base fabric block the light beam, causing malfunctions (Also, models using carbon dioxide lasers had problems such as high maintenance costs.

In the third conventional example, the inspection type stopping device is a post-processing process that stops the machine by detecting scratches that occur after the carpet is made.
There was a problem that by the time the machine stopped, a fairly long thread breakage had already occurred, and it took a lot of time and effort to repair the damage.

[Means for solving problems]

In order to solve the above-mentioned problem, the present invention provides a needle in which one or more optical fibers are embedded in the trunk and the end face of the optical fiber is exposed through the thread insertion hole to serve as a light receiving part, and a base. It consists of a light source that is attached below the cloth and emits light to the optical fiber light receiving part of the needle, and a thread cutter sensor and main drive shaft stop device that are connected to the optical fiber. It is designed to sense the presence and stop the machine.

[Effect]

According to this invention, if there is a pile thread in the thread insertion hole of the needle, the light will be blocked and the light will not be transmitted to the optical fiber, and if the pile thread breaks and the thread insertion hole becomes empty, the light will not be transmitted to the optical fiber. is transmitted and the main drive shaft stop device is activated via the thread cut sensing device to stop the machine.

〔Example〕

1 to 6 show a first embodiment of the present invention. The stopping device for the tufted machine of this first embodiment is as follows:
As shown in FIGS. 1 to 4, one optical fiber 2 is embedded in the trunk 1, and the end face of this optical fiber 2 is exposed through the thread insertion port 3 of the needle tip, and is used as a light receiving section 4. The light source body 5 is positioned below the base fabric 24 and emits light to the light receiving part 4 of the needle N, and the thread cutter sensor 6 and main drive shaft stop device 7 are connected to the optical fiber 2. The machine is configured to stop the machine by sensing the presence or absence of pile yarn Y in the yarn insertion hole 3, ie, yarn breakage.

The upper end surface of the handle 10 of the needle N is finished into a smooth flat surface, and the end surface of the optical fiber 2 is exposed here, and is used as an optical connection section 8. Therefore, the needle N is removably attached to the needle par 9 (see Fig. 1) which is driven in the vertical direction via an optical connector (not shown), and the light received by the light receiving section 4 is embedded in the needle par 9. The signal is then transmitted to the thread cutter sensing device 6 via the optical fiber that is connected to the thread cutter.

As shown in FIGS. 5 and 6, the optical fiber 2 is embedded from the side surface of the cylindrical handle 10 of the needle N along the center of the groove surface of the long groove 11. When the optical fiber 2 is made to emit light on the side of the needle while the thread cutting light is being transmitted, it is very convenient to find broken threads from a large number of pile threads and to quickly perform the thread splicing operation. It has the advantage of being able to

The light source body 5 is an elongated straight tube installed parallel to the needle row, and a light amount adjuster is attached to the power supply section to finely adjust the sensitivity of the thread cut sensing device 6.

When using the tufted machine stopping device of the present invention, as shown in FIGS. 7 and 8, when the pile yarn Y is present in the yarn insertion hole 3, the light from the light source 5 is blocked. If the pile yarn Y breaks due to some reason and comes out of the thread insertion hole 3, the light enters the light receiving section 4 and is transmitted to the optical fiber 2. ,
The thread trimming sensor 1t6 detects this and activates the main drive shaft stop device 7.
The machine will stop by sending a stop signal to the machine.

After the machine has stopped, the broken pile yarn is passed through the yarn insertion hole 3 and spliced, and the start switch is pressed to rotate the main drive shaft and start the machine.

FIG. 9 is a sectional view showing a needle according to a second embodiment of the invention. In the needle of this second embodiment, the optical fiber 2 is buried in the center of the trunk 1, and the optical fiber 2 is also buried in the center of the long groove 11.

FIG. 10 is a sectional view showing a needle according to a third embodiment of the present invention. In the needle of this third embodiment, the optical fiber 2 is embedded in a part slightly offset from the center of the trunk 1, that is, in one corner of the long groove 11.

In addition to embedding one optical fiber in the needle as described above, it is also possible to embed a plurality of optical fibers in the needle depending on the application to improve thread cut sensing sensitivity. Further, the position where the optical fiber is buried in the needle can be appropriately selected in consideration of the method of connection to the optical connector, the luminescence properties during optical transmission, and the like.

〔effect〕

As described above, the stopping device for a tufted machine according to the present invention embeds an optical fiber in the needle, provides the light receiving part in the thread insertion hole, and attaches a light source below the base fabric to the thread insertion hole. This device is designed to detect the presence or absence of pile yarn, and most of the yarn breakage of pile yarn occurs in the yarn insertion hole where the highest tension is applied, so there is little deviation in the timing of detection, there are few malfunctions, and The damage to the product caused by the cut is minute, so it does not take much time to repair. Conventionally, one tufting machine required one or two people to detect the thread breakage and to repair it.
By employing this stopping device, one person can be in charge of multiple machines, which has the effect of significantly reducing costs and improving quality by reducing scratches.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a first embodiment of the present invention, FIGS. 2 and 3 are a plan view and a side view showing the same needle,
Figure 4 is an enlarged sectional view of the tip of the same needle, Figures 5 and 6 are sectional views taken along line 1-I in Figure 2, and Figure 2 n
- I 11 is a schematic diagram showing the first conventional example number, FIG. 12 is a schematic diagram showing the second conventional example, and FIG. 13 is a schematic diagram showing the third conventional example. . 2... Optical fiber 3... Thread insertion hole 4...
Light receiving part 5... Light source body 6... Thread trimming sensing device
7... Ground drive shaft stop device 24... Base fabric N
...Needle Y...Pile thread Patent applicant Kawaju Plant Assistance Co., Ltd. Asahi Trading Co., Ltd.

Claims (1)

[Claims] A needle in which one or more optical fibers are embedded in the trunk, and the end face of the optical fiber is exposed through the thread insertion hole to serve as a light receiving part; It consists of a combination of a light source body that emits light, a thread cutting sensing device connected to the optical fiber, and a main drive shaft stopping device, and the machine is stopped by sensing the presence or absence of pile thread in the thread insertion hole. Tufted machine stopping device.