JPS6323401Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the configuration of a snail wire attachment rappet provided in a yarn guide section of a ring spinning machine, a ring twisting device, etc., and in particular, a piezoelectric element is attached to a part of the snail wire to attach a piezoelectric element to a part of the snail wire. This invention relates to the construction of a rappet to which a snail wire is attached, which detects the inherent vibrations generated in the snail wire upon contact and detects the presence or absence of threads.

The present inventors have proposed various methods and means for detecting yarn breakage in ring spinning machines and the like, and have provided practical devices to the industry. These yarn breakage detection means focus on the fact that natural vibration is generated in the snail wire when the snail wire attached to the rappet comes into contact with the spun yarn, and this natural vibration is generated in a part of the snail wire. Detection is performed using an attached piezoelectric element. That is, the first
The figure is a schematic side view showing one spindle of a ring spinning machine equipped with a thread breakage detection means.
The fleece fed out by the front top roller 1a is twisted into a spun yarn Y, which is wound onto a bobbin 8 through a snail wire 3 inserted into a lappet 2 attached to a lappet bar 4. Further, during winding, the yarn is wound through a traveler 6a that is loosely fitted into a ring 6 that surrounds the bobbin 8 and moves up and down, and the traveler 6a rotates following the active rotation of the bobbin 8 to twist the yarn. The ring 6 moves up and down together with the ring rail 7 to form a pipe thread 8a. Note that 5 is a balloon control ring.

On the other hand, when the rappet 2 is attached to the rappet bar 4 as shown in FIG. 2 (enlarged side view), it is attached so that lead wires of a piezoelectric element, which will be described later, are connected to a conductive plate 10 via an insulating plate 9. As the conductive plate 10, the lead wire connection terminal portions are printed and interconnected to scan and detect signals from each piezoelectric element. In addition, the lappet 2 is formed with a sliding insertion part 2a for thread breakage detection snail wire 3, and the snail wire 3 to be inserted into the insertion part 2a is inserted into the cylinder 11 in advance and is assembled as a single component. It is configured. As shown in FIG. 3 (partially cutaway enlarged side view), this single component is constructed by inserting the root portion of the snail wire 3 into the cylinder 11 made of an insulating material via the elastic materials 12, 12a. At the same time, a flat part 3b is formed at the base, and a piezoelectric element 13 is attached to one side of the flat part 3b. In order to increase the sensitivity of the piezoelectric element 13, one or more grooves are provided on the opposite side of the flat part 3b to which the piezoelectric element is attached, or to make it easier to draw out the lead wires 14, 14 of the piezoelectric element 13. The end of the flat portion 3b is further flattened or a groove or the like is formed. Also, these lead wires 14, 14
are respectively connected to contact terminals provided on both sides of the cylindrical body 11, and these contact terminals are adapted to come into contact with terminal portions previously provided on both inner sides of the sliding insertion portion 2a.

Furthermore, to extract the signal, a cylindrical shaft 16 made of an insulating material is inserted into the hinge shaft of the rappet 2, and the rappet return spring/lead wires 14a, 14a are inserted into the shaft of the cylindrical shaft 16. (Fig. 4, 5
(See figure) The lead wires 14a, 14a are attached so as to pass through the through holes of the insulating plate 19 and come into contact with the connection terminals of the conductive plate 10.
The signal is scanned and detected to detect so-called yarn breakage weights that do not generate natural vibrations.

By the way, as shown in FIGS. 2 and 3, the snail wire 3 provided in the rappet 2 for detecting yarn breakage has a yarn guide portion of a shape commonly used in the past. A slab catcher 3a is formed to remove the slab inside. That is, this slab catcher 3a is used when spinning yarn Y contains abnormally swollen knots (slabs).
This slab is hooked by the centrifugal force of the balloon and the tube thread 8
This serves to prevent the yarn from being wound up in the yarn a, but the spun yarn Y on which the slab is caught is often thrown around and broken off without being cut instantly. Therefore, when the slub catcher 3a hooks the slub yarn, it is pulled abnormally, and in the above-mentioned snail wire for yarn breakage detection, the piezoelectric element 13 attached to the base side of the snail wire may be broken, or the detection function may be damaged. Shortcomings have been pointed out, such as a decrease in

The present invention has been made with attention to these points, and is intended to provide a rappet that catches slabs and does not impede the yarn breakage detection function. However, this invention removes the slub catcher that was conventionally installed on the snail wire for thread breakage detection from the snail wire, and replaces the slub catcher with a sliding catcher that is integrally formed on the lower surface of the lappet. It is characterized in that it is attached to the side wall surface of the insertion portion on the snail wire insertion entrance side. The present invention will be described in detail below based on the drawings, but the drawings show one example of a concrete implementation of the invention, and the invention is not limited to these illustrated examples. The same implementation is possible even if a part of the shape or design is changed in accordance with the spirit described later.

FIG. 4 is a side view of a ratpet for detecting a broken thread to which the present invention is applied, FIG. 5 is a plan view of FIG. 4, FIG. 6 is a right side view of FIG. 4, and FIG. 7 is a cut-away view of FIG.
In these figures, the piezoelectric element 13 attached to the snail wire 3 and its holding means and their configurations are formed in the same manner as described above, and in this device, the slab catcher 3a that was directly fixed to the snail wire 3 is formed of a thin steel plate and is attached to the outside of the sliding insertion portion 2a formed in the rappet 2 by 15.
The figure shows the slab catcher 15 made of steel plate and welded, but it may be attached by screws or adhesive, or it may be made of a round bar material like the previous one.
From the viewpoint of manufacturing, it is recommended that it be made of steel plate material. The shape can be designed as desired, but it is recommended that the snail wire side be made into an inclined end surface drawn downward as shown in the figure, the opposite end surface be a straight surface perpendicular to the ratpet 2, and a hook bent backward at the lower end be formed.

In the rappet for thread breakage detection configured in this way,
Since the slub catcher is not provided on the snail wire 3, the slub yarn does not directly pull the snail wire 3 and does not impede the yarn breakage detection function, allowing stable use over a long period of time. In addition, since the slab is caught by the slab catcher 15 provided on the rappet side, it does not enter the pipe yarn 8a, making it extremely suitable as a rappet for detecting yarn breakage. was able to promote this.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing one spindle of a ring spinning frame equipped with thread breakage detection means, Fig. 2 is an enlarged side view of the rappet in Fig. 1, and Fig. 3 shows a partial configuration of Fig. 2. An enlarged partially cutaway view, FIG. 4 is a side view of the rappet of the present invention, FIG. 5 is a plan view of FIG. 4, FIG. 6 is a right side view of FIG. 4, and FIG. 7 is a cutaway of FIG. 5. line -
FIG. 1... Front bottom roller, 2... Rappet, 3... Snail wire, 3a... Slab catcher, 4... Rappet bar, 5... Balloon control ring, 6... Ring, 7... Ring rail, 8...Bobbin, 8a...Tube thread, 9...
Insulating plate, 10... Conductive plate, 11... Cylindrical body, 12...
...Elastic material, 13...Piezoelectric element, 14...Lead wire, 15...Slab catcher, 16...Insulated cylindrical shaft.

Claims (1)

[Scope of utility model registration request] This is a yarn breakage detection rappet that detects the presence of spun yarn by attaching a piezoelectric element to a part of the snail wire provided in the rappet. In the yarn breakage detection lappet that is inserted into the sliding insertion part that is integrally formed on the lower surface, the slab catcher fixed to the snail wire is removed, and this is attached to one side wall surface of the sliding insertion part. A rappet for thread breakage detection, characterized in that it is attached to the snail wire insertion entrance side of the snail wire.