JPS6047190B2 - Rappet for thread breakage detection - 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 handling yarn, and particularly in a rappet equipped with a snail wire for detecting yarn breakage. A piezoelectric element is attached to the snail wire, and an electric signal for detecting thread breakage is transmitted to the outside of the rappet by providing a connection terminal in the rappet attachment part.

The present applicant previously proposed a thread breakage detection method. This method focuses on the fact that a thread guide member protruding from a thread passage section generates natural vibration when it rubs against the thread, and detects the natural vibration to detect the presence or absence of a thread. Ta. In addition, these yarn breakage detection methods are extremely effective when applied to the snail wires of rappets installed in ring spinning machines in spinning mills, and are highly desired by operation managers. Based on these, the present applicant installed a piezoelectric element on the snail wire of a rappet provided in a ring spinning machine, and determined a preferable configuration of the snail wire, a detection means, and a method for detecting these signals in order to extract an electrical signal from the piezoelectric element. Various proposals have been made regarding the configuration of the rappet for taking out the material. By the way, in the case of thread breakage detection means that utilizes a snail wire provided on the rappet, the piezoelectric element is attached directly to the snail wire, or the piezoelectric element is attached to a member to which the snail wire is integrally fixed. Two leads are required from the piezoelectric element to amplify and convert electrical signals individually or in a concentrated area, and to determine and detect the region of operation.

These lead wires are connected to the above-mentioned detection device, and the lead wires are connected from the detection device to a warning device and a sign device. However, these leads need to be electrically insulated from the machine stand and wired properly to ensure reliable removal. It is undulated and swung during yarn change and yarn splicing. The leads must therefore be treated accordingly. Furthermore, the rappets and attachment parts of spinning machines tend to generate and accumulate fluff, so a wiping type cleaning device is applied. In addition, the recently popular automatic tube changer or automatic yarn splicing device handles the yarn by reversing the rappet (pushing up the snail wire so as to remove it from the yarn path) before starting the operation. Snail wire is frequently activated. The rappet and snail wire provided with the thread breakage detection device are required to be able to cope with these problems and to be able to operate them without any hindrance. The present invention has been made based on the above, and in particular, the rappet body and its hinge mounting member are formed of an insulating material, and the lead of the piezoelectric element attached to the snail wire is connected to the contact plate provided on the rappet body and the rappet hinge mounting member. These connections are configured to take out electrical signals using a hinged pivot shaft.

The present invention will be described in detail below based on the drawings, but the drawings show one example of a specific implementation of the present invention, and the present invention is not limited to the illustrated example.
Even if the shape of the component parts is changed or the design is changed, the same implementation is possible. FIGS. 1 and 2 are explanatory diagrams schematically showing the arrangement of the rappet for detecting yarn breakage according to the present invention and the detection of yarn breakage. The snail wire 2 supported by the rappet 3 is rubbed and wound around the bobbin 8 via the traveler 6 of the ring 5 provided on the ring rail 4, thereby forming a package 7 (pipe thread).

The snail wire 2 is positioned so as to correctly guide the spun yarn Y onto the axis of the tube yarn 7, and the spun yarn Y is always in contact with the snail wire 2. The frictional energy of the yarn Y generates unique vibrations in the snail wire 2, and by detecting the vibrations, the presence of the spun yarn Y can be detected. As shown in FIG. 2, these devices include two lead wires connecting a piezoelectric element 11 attached to a part of the snail wire 2 to a detection device 10. The detection device 10 uses a charged 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 to convert the AC signal into a DC signal. converted into a signal. and voltage comparator 1
The rappet 3 according to the present invention described above is constructed as shown in FIGS. 3 to 6, and Figure 3 shows the side, Figure 4 shows the top, Figure 5 shows the right side of Figure 4, and Figure 6 shows the snail wire member removed.
It is an explanatory view showing the main parts cut away and omitting the hinge mounting member.

FIG. 7 is an explanatory diagram showing these configurations in relation to each other, and FIG. 8 is an explanatory diagram of a partially assembled configuration. In these figures, the rappet for detecting thread breakage according to the present invention has a rappet main body 3 and a hinge mounting member 19 each integrally molded with a highly insulating synthetic resin material, and a snare wire 2.
is constructed by attaching a piezoelectric element 11 to its end and storing it within an insulating frame 20. The rappet body 3 and the hinge mounting member 19 are hinged with a pivot shaft, and the snail wire 2 is inserted into the slide groove formed in the rappet body 3 together with the insulating frame 20.
3, and the mounting position (in/out) can be adjusted with a screw plate 34 provided inside the rappet body 3. That is, the rappet main body 3 is formed with a screw plate insertion slot 33 and the slide groove 23 as shown in FIG. Form. Also, the gutter 2
4 is recommended to be formed so as to close only the rappet insertion side (front) (Fig. 6). On the other hand, the snail wire 2 is attached to the insulating frame 20 via an elastic material 2', as shown in FIG. Installation, the piezoelectric 11
The leads 21, 21 from the insulating frame 20 are connected to terminal plates 22, 22 attached to both sides of the insulating frame 20, respectively. It is recommended that the terminal plates 22 be installed in grooves formed on both sides of the frame 20, and are provided so as to correspond to the side grooves 24 of the slide grooves 23 formed in the rappet body 3, respectively. On the other hand, contact lead plates 25, 25 as shown in FIG. 6 are housed in the side grooves 24, 24, and the contact lead plates 25 are inserted into the side grooves 24 from the hinge part of the rappet main body 3, as shown in FIG. They are connected to each other and are formed of a plate-like part, a bent part, and a curved part, and the plate-like part is arranged at the hinge part, and the curved part is arranged in the side groove 24 so that its top part elastically protrudes into the slide groove 23 . Therefore, the insulating frame 20 inserted into the slide groove 23 has its terminal plates 22, 22 in contact with the contact lead plates 25, 25 to conduct electricity, and even if the mounting position of the snail wire 2 is adjusted and displaced, these terminal plates 22, 22 contact the contact lead plates 25, 25, and conduct electricity. retains the conductive effect of The slide grooves 23 and side grooves 24 in which the contact lead plates 25, 25 are disposed, and the connecting portions of their rear ends have two
A lid body 27 as shown in 7 is fitted, and the lid body 27 is simply fitted or joined with an adhesive. Also, hinge mounting member 1
Reference numeral 9 indicates a rappet main body hinged portion 19''. Rappet support portions are formed on the rappet mounting surface and both sides thereof, and a through hole 30 is formed in the hinged portion 19''.

In addition, there are insertion holes 2 on the mounting surface side of the butterfly part 19''.
9 and 29 are formed, and the insertion hole 29 is provided to penetrate so as to intersect with the through hole 30. Terminals 31, 31 are inserted into the insertion holes 29, respectively, and the terminals 31 are composed of a plate portion and a bullet plate portion. Therefore, these assemblies are performed using the insertion holes 26 formed in the plate-shaped portion of the contact lead plate 25.
, as shown by the dotted line in FIG.
0, and the insertion hole 32 formed in the plate-shaped portion of the terminal 31 is also inserted into the insertion hole 29 so as to coincide with the through hole 30. Then, the through holes 35, 35 provided in the hinge part of the rappet body 3 are aligned with the through hole 30 of the hinge part 19'', and the support shafts 28, 28 are inserted from both sides of the through holes 35, 30.The support shaft 28 and 28 electrically connect the contact lead plate 25 and the terminal 31 on each side as shown in FIG.
It passes through the insertion hole 32 of. Note that these insertion holes 26, 3
2 is electrically fitted with the support shaft 28, so the lead plate 25 and the terminal 31 are each made of an elastic conductive plate, and the insertion holes 26 and 32 are not punched holes but are extruded enlarged chrysanthemum holes. It is recommended to form the contact surface with the shaft 28 so as to maintain it. As shown in FIG. 7, the support shaft 28 is formed with a sharp point on the insertion tip side, and a protrusion along the axial direction is formed on the large insertion diameter portion, so that it is held in the insertion through hole 35 of the rappet main body 3. Ru. Therefore, it swings as the rappet main body 3 is tilted. The lead plate 25 swings together with the rappet body 3 and the support shaft 28, so that the insertion hole 26
is electrically connected to the support shaft 28. On the other hand, the terminal 31 provided on the hinge member 19 side has its insertion hole 32 connected to the support shaft 2.
The insertion hole 2 of the terminal 31 is
9 is formed as a hole several times wider than the thickness of the terminal 31, so that the terminal 31 is arranged inclined in the insertion direction, and the insertion hole 32
is inclined and comes into contact with the support shaft 28. Further, as described above, the tip of the terminal 31 forms a bullet plate, so the insertion hole 32 and the support shaft 28 are always electrically connected, and even if the support shaft 28 swings and rotates, these connections are ensured. will be maintained. Further, a pressure contact plate may be provided on the lead plate side, or a plurality of metal pushers may be interposed in these joint portions. and spindle 2
8 uses materials with good conductivity. With this configuration, as shown in FIG. 8, the lead wires of the piezoelectric element 11 are formed via the contact sorting plate 25, the support shaft 28, and the terminal 31, respectively, and the lead plate 25 rotates on the support shaft 28. The electrical connection is maintained even when the Terminals 31, 31 are formed protruding from the mounting surface of the rappet hinge mounting member thus assembled as shown in FIGS. The terminals 31, 31 can be attached to the terminals of the wiring board 17 with or without the board 18 interposed therebetween. 1
6 is a lappet bar.

Since the rappet for thread breakage detection of the present invention is constructed in this manner, the leads of the piezoelectric element attached to the snail wire can be tied without being exposed to the outside of the rappet, and the rappet can be used in exactly the same way as a conventional rappet. be able to.

In particular, in the rappet of the present invention made of synthetic resin, the rabbet main body is made of an insulating material, so the lead plate and the terminal can be easily attached, and the yarn breakage detection device can be provided at a low cost. promote the use of

[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 an overview of the thread breakage detection device, Fig. 3 is a side view of the rappet of the present invention, and Fig. 4 is the same as Fig. 3. Plan of
Fig. 5 is a right side view of Fig. 3, Fig. 6 is a cutaway explanatory diagram of the main part configuration, Fig. 7 is an explanatory diagram of the configuration and development, and Fig. 8 is an explanatory diagram of a partial assembly of Fig. 7. be. 2... Snail wire, 3... Rappet main body, 10... Thread breakage detection device, 11...
...Piezoelectric element, 16... Rappet bar, 17.
...Wiring board, 18...Insulating board, 19...
...Hinge mounting member, 20...Insulation frame, 21...
・Lead, 22...Terminal board, 23...Slide groove, 24...Side groove, 25...Contact lead plate, 27...Lid body, 28... ...Spindle, 2
9...Insertion hole, 30...Through hole, 31
...Terminal, 32...Insertion hole, 33...
...Skillyu plate Screw plate insertion slot, 34...Skillyu plate, 35...
...Through hole.

Claims (1)

[Claims] 1 In a rappet constructed of a snail wire inserted into a rappet, a piezoelectric element is attached directly to the wire or to a part formed integrally with the wire, and the vibration generated by contact with the passing thread is detected. The main body and its hinge mounting member are constructed of an insulating material, and the leads of the piezoelectric element are inserted into a contact lead plate provided in the rappet main body and the hinge mounting member to protrude from the mounting contact surface of the member. The contact lead plate and the protruding terminals are connected by inserting and penetrating them from both sides, using a conductive material as the pivot shaft that hinges the rappet body and the hinge mounting member. A rappet for thread breakage detection characterized by the following configuration.