JPS5931637Y2 - Photoelectric stoppage detector for running fiber yarn - Google Patents

Description

[Detailed explanation of the invention] This invention can be applied to plant fibers, animal fibers, mineral fibers, man-made fibers,
Regardless of the quality or type of fiber yarn made of synthetic fibers,
This invention relates to a photoelectric stoppage detector that can detect any yarn that is cut or has stopped running without contact.

In conventional photoelectric yarn breakage detectors, the light-emitting element and light-receiving element built into the groove-shaped housing are placed opposite each other at a considerable distance (several tens or more) on the same line through each glass window. ■The installation angle must be such that dust does not accumulate on the glass window of the light emitting/receiving section. ■Avoid installing in a location where sunlight can directly enter the glass window of the light receiving section.■Glass of the light receiving section. 45 degrees so that the light from the electric light does not shine directly into the window.
There were various inconveniences in the mounting and installation, such as requiring mounting at the above angle and at a distance of 17 iA or more.

This invention not only solves the above-mentioned drawbacks, but also not only determines the presence or absence of the thread by simply cutting the running thread.
This system detects when the thread stops running, that is, when the thread stops running and remains between the light emitting and receiving parts.The purpose of this is to prevent dust from entering the light emitting and receiving part, and to By making it easier to clean the dust-proof cover that protects the light-receiving part from dust and to replace the dust-proof cover, it also prevents the light-emitting and receiving part from malfunctioning due to the influence of external light. An object of the present invention is to generally provide a photoelectric stall detector for running fiber yarns.

An embodiment of this invention will be described below with reference to the drawings.

Reference numeral 1 denotes a vertically elongated rectangular parallelepiped-shaped housing (made of synthetic resin in this case) equipped with a back cover 11, and the entire housing is colored black to prevent it from being affected by light.

Claws 1c protrude from symmetrical positions in the center of the side surface 1b of the opening on the back cover 1a side of the housing, and the claws are inserted into through holes 1d drilled in the back cover 1a at positions corresponding to the iron water. Fit and lock the back cover 1. It is removably attached to the opening 1e of the housing 1.

On the surface of the back cover 1a, there is a metal upright tongue piece 3 provided on the base 2.
A vertical insertion groove 1f is provided in a tapered shape so that the detector can be tightly inserted into the sensor to prevent malfunction due to vibration of the detector itself.

Reference numeral 4 denotes a synthetic resin base integrally formed on the upper surface of the housing 1, and a square container-shaped cap 5 that is flush with the outer surface of the housing 1 is fitted to the periphery of the rigging.

On the table 4, facing plates 6 are formed integrally with the rigging, standing vertically so as to be parallel to each other, and facing each other close to each other (about 6TrIIrL in this example).

The reason why the opposing plates 6 are placed close to each other in this manner is to avoid the influence of external light.

Grooves 61 are formed at mutually opposing positions on both ends of the facing plates 6, 60, and alumina porcelain yarn guides 7 having a U-shaped cross section are fitted into the corresponding grooves 6a. The height is such that the upper part of the plate protrudes from the upper end surface of the opposing plate 6.

Reference numerals 8 and 9 indicate through holes bored on the same center line in the center of the opposing plate 6, and reference numerals 10 and 11 indicate a light emitting element and a light receiving element respectively mounted on the opposing plate 6 so as to be located above the through holes 8 and 9. show.

A light emitting diode is used as a light emitting element, and a phototransistor is used as a light receiving element.

Reference numeral 12 denotes a cross-sectional dustproof cover that can be fitted and removed between the facing plates 6 and 6. It can be made of either glass or plastic as long as it is a transparent material, but from the standpoint of weight reduction and strength, plastic is preferable. The dustproof cover 12 is formed by integrally forming a U-shaped portion 123 and a collar 12 by extending the upper end of the U-shaped portion in the horizontal direction. In order to prevent it from wobbling or moving when fitted between the facing plates 6, 6, a notch 12c is provided at both ends of the lower surface of the collar 12b, and the vertical hole formed in the top end surface of the facing plate 6 is formed by the notch 12c. Warp it so that it fits into 6b.

In addition, the entire surface of the collar 12b of the dustproof cover 12 and the U-shaped portion 12a
The upper part is subjected to light blocking treatment such as applying black paint 4,
The light emitting/receiving part is made completely unaffected by external light.

This dustproof cover 12 is intended to prevent dirt and dust from entering the light emitting/receiving section, and in particular, the upper end of the U-shaped portion 12a is extended in the horizontal direction and the collar 12b is integrally formed. This is to facilitate the installation, removal, and replacement of the dustproof cover, and to facilitate the removal of dust, dirt, etc. attached to the inner wall surface of the U-shaped portion 12b.

Reference numeral 13 denotes a pilot lamp that is screwed into a base 14 fixed perpendicularly to the stand 4, and is connected to a 12V power supply voltage, so that when the fiber thread A running through the thread guide 7 breaks or stops running, The lamp is turned on only when the vehicle is running, and is turned off while driving.

The yarn cutting or running stop indicator light 15 is composed of a pilot lamp 13 and a cap 5.

The cap 5 is colored orange for its function as an indicator light, and has a notch 5a in a portion corresponding to the thread guide 7.
This is done so that there is no hindrance to the running of the fiber threads.

Since the indicator light 15 is located above the housing 10, it is extremely clear and easy to confirm.

Reference numeral 16 denotes a stoppage detection circuit which receives light emitted by the light emitting element 10 via the thread A at the light receiving element 11 and detects a change in the amount of light.

This stall detection circuit includes a DC amplification circuit 17 that amplifies the noise signal detected by the light receiving element 11, an inversion output circuit 18 that inverts and produces an output signal only when the noise signal stops, and a steady current in each of these circuits. , and a power supply circuit 19 for supplying voltage.

In the figure, 20 is a light shielding plate installed near the pilot lamp 13, which is required when an AC power source is used.

Reference numeral 21 denotes a dial-shaped power switch that is partially protruded from the front surface of the housing 1 so that it can be connected to the light emitting element 10 and the light receiving element 11 for on/off operation, and also serves as sensitivity adjustment.

Since this idea has the above structure, in its practical use,
The cap 5 is inserted into the upright tongue piece 3 of the housing 1 with the cap 5 attached to the head and set.

Next, turn on the power and turn on the power switch 21.

On the other hand, the fiber yarn is passed through the U-shaped portion 12a of the dustproof cover 12 through the yarn guide 7, and the fiber yarn runs here.

While the thread is running, the light from the light emitting element 10 is received by the light receiving element 11 through the thread and photoelectrically converted.
Since the signal is amplified in step 7 and extracted as a noise signal, the indicator light 15 does not light up.

When the thread is cut or stops running, there is no change in the amount of light received by the light receiving element 10, so the inversion output circuit 1
8 is activated, and the indicator light 15 is activated.

In this way, the breakage or running stop of the yarn is detected without contacting the yarn.

Cleaning of the dustproof cover 12 is as follows: After removing the cap 5 from the head of the maggot puffer fish 10, take out the dustproof cover 12 from between the facing plates 6 and 6, and wipe off any dust etc. that has adhered to the U-shaped part 12a. If so, it can be used repeatedly.

As can be seen from the above explanation, this device has a cross-sectional dust-proof cover made of a transparent material that blocks light, and can be freely inserted and removed between opposing plates that have a light-emitting element and a light-receiving element that face each other in close proximity. The light emitting/receiving section is protected from intrusion of dust, etc., and the dust cover can be easily removed to easily clean dust adhering to the dust cover, allowing repeated use. It is semi-permanent.

In addition, in order to effectively block the incident light due to dust between the closely facing facing plate and the dustproof cover that has been subjected to light blocking treatment, the installation position and installation angle must be determined in consideration of sunlight and electric light as in the past. Not only does it eliminate the hassle of deciding on the correct value, but it also has excellent effects such as no malfunctions due to the influence of external light.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing one embodiment of this invention, Fig. 2 is an exploded perspective view thereof, Fig. 3 is an exploded perspective view showing the back side of the housing, and Fig. 4 is an installation of the sensor of the invention. A side view showing the state, and FIG. 5 is a block diagram showing the circuit configuration of this invention. DESCRIPTION OF SYMBOLS 1... Housing, 5... Cap, 6... Opposing plate, 10... Light emitting element, 11... Light receiving element, 12...
...Dust-proof cover, 16... Stagnation detection circuit.

Claims (1)

[Scope of utility model registration request] A cross-sectional dust-proof cover made of a transparent material with a light-shielding treatment is provided on the upper part of the facing plate with a light-emitting element and a light-receiving element facing each other in a removable manner. A photoelectric stall detector for running fiber yarn, which detects changes in the amount of light received by a light receiving element via the yarn using a stall detection circuit.