JPS6228208B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rappet used as a yarn guide device in a spinning machine or a machine that handles yarn, and particularly in a rappet equipped with a snail wire for detecting yarn breakage. The electrical signal conductive wire (hereinafter simply referred to as the cord) is taken out of the rappet using a return spring provided to keep the rappet restored, and connected to the rappet mounting member or other connecting device, so that the cord does not come out outside. To relate to a rappet which can be connected securely and which does not hinder rappet operation at all.

The present applicant previously proposed a thread breakage detection method. This method focuses on the fact that a thread guide member provided protruding from a thread passing section generates natural vibrations when it rubs against the passing thread, and detects the natural vibrations to detect the presence or absence of threads. be. Further, in the spinning process, it is extremely effective to apply yarn breakage detection to the snail wire of the rappet provided in a ring spinning machine, and this is what operation managers desire most. Based on these, the present applicant has also proposed a preferred structure or shape of the snail wire when attaching the piezoelectric element described above to the snail wire of a rappet provided in a ring spinning machine.

By the way, in the thread breakage detection means that uses the snail wire of the rappet, a piezoelectric element is attached directly to the snail wire, or a piezoelectric element is attached to a member to which the snail wire is fixed, and the electrical signals of the piezoelectric element are detected individually or The concentration section amplifies, converts, and determines the region of operation. Further, two cords are drawn out from the piezoelectric element, and these cords are connected to the above-mentioned detection device. Furthermore, each ring spinning machine has nearly 400 rappet and snail wires, and it is difficult to install the above-mentioned detection device on each rappet due to equipment costs, so a scanning method is used. In addition, the cord from the piezoelectric element needs to be insulated from the machine base and wired in a precise manner. In particular, the rappets of a ring spinning machine rise during winding, and undulate and sway when changing the yarn or splicing the yarn. These must be addressed. Further, the rappet attachment portion is prone to generate and accumulate fluff, so a wiping type cleaning device is applied. Furthermore, it is necessary to operate the rappet before starting work on automatic pipe changing equipment, yarn splicing equipment, etc. For these reasons, the rappet snail wire provided with the thread breakage detection device is required to have almost the same external shape as the conventional wire and to not interfere with the various operations described above.

The present invention was arrived at as a result of intensive studies based on these findings.In particular, it was discovered that these rappets are provided with a restoring spring to constantly hold the rappets stably and are biased to return to a normal position. We focused on the fact that if the springs are arranged in two rows and insulated, they can be pulled out and connected to the outside of the lappet without the need for a special cord connecting device, and the external shape can be configured almost the same as the conventional one. It was made by

The present invention will be explained in detail below based on the drawings, which show an example of a specific implementation of the invention.
The present invention is not limited to the illustrated example, but can be implemented in the same manner by changing the shape of the component parts or changing the design, keeping in mind the spirit of the above and later descriptions. 1 and 2 are explanatory diagrams schematically showing the arrangement of the rappet for detecting yarn breakage and the detection of yarn breakage according to the present invention. The snail wire 2 supported by the rappet 3 is rubbed and wound onto the bobbin 8 via the traveler 6 of the ring 5 provided on the ring rail 4, and the package 7 (pipe thread) is wound onto the bobbin 8.
is formed. And snail wire 2 is spinning Y
The spinning yarn Y is in constant contact with the snail wire 2. Therefore, unique vibrations occur in the snail wire 2, and by detecting the vibrations, the presence of the spun yarn Y can be detected. And as a detection device,
As shown in FIG. 2, a piezoelectric element 11 attached to a part of the snail wire 2 is connected to a detection device indicated by 10.
The detection device 10 uses a band amplifier 12 to select the natural oscillation frequency of the snail wire in the signal, and then uses an amplifier 13 to amplify it to an easily distinguishable level, and a rectifier and smoother 14.
converts an alternating current signal into a direct current signal. The voltage comparator 15 then determines the region of reliable operation and outputs a logic signal output 15'.

By the way, the rappet 3 according to the present invention described above has the following features:
As shown in the side view of FIG. 3, the top view of FIG. 4, and the bottom view of FIG. The cord of the piezoelectric element attached to the wire 2 is connected to the outside of the lappet 3. The cord pulled out from the rappet 3 passes through the wiring board 17 through the hole in the insulating plate 18 provided at the rappet mounting part.
contact and connect. A printed wiring board is used as the wiring board 17, and the cords 28, 28 (FIG. 5) drawn out from the lappet 3 are pressed against the conductive portion 19 of the wiring board 17 (FIG. 4). The structure and assembly of these components are shown expanded in FIG. 6, and will be explained below based on FIG. 6. A piezoelectric element 11 is attached to the base of the snail wire 2 (not shown), and the snail wire 2 is supported by a case 2' via an elastic material 20. Forming grooves 22 on both outer surfaces of the case 2',
A long conductive contact piece 23 is attached to the groove. Each of the contact pieces 23 is provided with a piezoelectric element 1.
Connect the cord of 1.

On the other hand, a snail wire insertion part 21 is formed on the lower surface of the rappet main body 3, and the insertion part 21 is configured to penetrate in the front and back. However, the insertion portion 21 has a frame body 2.
4 is inserted into the insertion portion 21, and the frame body 24 has leg rods 25, 25 formed on both sides, respectively, and is inserted into the insertion portion 21 in a pull-out manner. The snail wire case 2' is inserted between the legs 25 of the frame 24 fitted into the insertion portion 21. Also, on the inside of both legs 25, 25 of the frame body 24, there is a spring conductive wire 2 used as a conductive cord.
7 are arranged so as to protrude from each other, and the contact piece 23 of the snail wire case 2' comes into contact with these conductive wires 27, 27 (one of which is not shown). Each of the conductive wires 27 has a coil portion 27' formed in a part as shown in the figure, and the tip end is connected to the frame body 27'.
The drawer cord 2 is passed through the groove 26 formed on the inner surface of the leg 25 of 4 and protrudes inwardly, and the rear end is bent outward.
Form 8,28. Further, since these conductive wires 27 also serve as restoring springs as described above, they are attached to the pivot portions of the rappet main body 3 and the rappet hinge member 35, and these need to be attached in an insulated manner. Although these assembly structures can be constructed by appropriate means, the one shown in FIG.
It consists of a cylinder 29 formed of an insulating material disposed between 7' and 27', and stepped stops 30, 30 fitted into the center hole of the cylinder 29. An insertion part 31 to be inserted into 29, a holding part 32 in which the coil 27' of the cord 28 is arranged, and a flange part 33 are integrally formed of an insulating material, and a through hole for a hinge core shaft 34 is formed in the center thereof. . To assemble these, the frame 24 into which the cords 28, 28 are inserted is inserted into the insertion portion 21 of the rappet main body 3, and the snail wire case 2' is inserted from the opposite side as described above. Then, the hinge part 3' of the rappet body 3 and the pivot parts 36, 36 of the hinge member 35 are aligned, and the cylinder 29 is positioned between the coil parts 27' of the cords 28, 28, and the stepped bolts are fixed from both sides. The tools 30, 30 are inserted and the core shaft 34 is passed through them. Therefore, assembly can be performed as shown in FIGS. 4 and 5. FIG. 7 shows another embodiment of the cords 28, 28 attached to the frame body 24, in which grooves 26 are formed in both legs 25, 25 of the frame body 24 in the same way as in the previous example, but the grooves 26 have holes 26 on the tip side. ', 26' are formed to serve as slide holes for the conductive wires 27. Note that the hole 26' may be formed so as not to open at the tip. The conductive wire 27 is formed with a bent portion 39 so as to be securely connected to the contact pieces 23 provided on both sides of the snail wire case 2'. Further, the coil portion 27′ of the conductive wire has coil portions 27′ on both sides of the cylinder 29.
7' is integrally formed, and ring seats 40 are fitted to the mounting steps 32, respectively. It should be noted that these components may be assembled in other configurations as long as the conductive wires 27 are insulated and installed in a manner that provides a spring effect.

Since the rappet for thread breakage detection of the present invention connects the cord of the piezoelectric element attached to the snail wire using the restoring spring as described above, (1) it can be constructed with almost the same external shape as the conventional rappet; Operation management can be performed in the same way as before.

(2) It is no longer necessary to take out and connect a special cord, so it can be used as before without being exposed to the outside.

(3) The snail wire is inserted into the rappet body so that its insertion and removal can be adjusted, and there is no need to consider the connection with the piezoelectric element even when adjusting the snail wire.

It is possible to enjoy the benefits such as, and moreover, it can be used stably over a long period of time.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the arrangement of the thread breakage detection rappet, Fig. 2 is a block diagram showing the outline of the thread breakage detection device, Fig. 3 is a side view of the rappet according to the present invention, and Fig. 4 is a diagram showing the arrangement of the thread breakage detection rappet. FIG. 3 is a plan view, and FIG. 5 is a bottom view of FIG. 3, with the mounting member removed. FIG. 6 is a developed explanatory view of the structure of the rappet, and FIG. 7 is a developed view of a part of FIG. 6 showing another embodiment. 2... Snail wire, 3... Rappet, 11... Piezoelectric element, 16... Rappet bar, 17... Wiring board, 1
8... Insulating plate, 19... Conductive part, 20... Elastic material, 21
...insertion part, 22...concave groove, 23...contact piece, 24...frame body, 25...leg, 26...groove, 27...conductive wire, 28...
Cord bending part, 29... cylinder, 30... stopper, 34...
Core shaft, 35...hinge member, 39...bending portion.

Claims (1)

[Claims] 1 A rappet whose main body is pivoted on a hinge member and which is always biased to one side via a restoring coil spring on the pivot part, and which is connected directly to a snail wire inserted into the rappet main body or with the snail wire.
In a rappet in which a piezoelectric element is attached to a physically formed member to detect the vibration of the snail wire, two sets of restoring coil springs are electrically insulated and are provided at the pivot portion, and both ends of the coil springs are connected to each other. One end of the coil spring is inserted into the rappet body and connected to both ends of the piezoelectric element provided on the snail wire, and the other end of the coil spring extends beyond the hinge member to the rear outside. A rappet for detecting thread breakage, characterized in that the tip of each of these protruding sides is bent into an L-shape and connected to a wiring connection board insulatively disposed on a rappet mounting member. .