JPS6112937A - Yarn monitor of spinning frame or draft 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 The present invention relates to a yarn monitoring device that monitors yarn breakage in a spinning machine or drafting machine and operates a device that stops the advance of the yarn or material or cuts it when one yarn breaks.

The present applicant has developed such a monitoring device in Japanese Patent Application Laid-Open No. 57-21002.
5, was proposed in Publication No. 58-70720. the above,
In the publication, the cables between the structural parts and the opening/closing parts of the stopping device or cutting device and the cables that conductively connect them to the power supply path on the machine side are disclosed only in outline, and the same is true of the three-dimensional arrangement of the electrical parts.

Since a thread monitoring device must be assigned to each thread running point on the machine body, the thread monitoring device should be considered a mass-produced product. Therefore, the formation and arrangement of components, including electrical elements, and the way in which cables are connected between them are of high economic importance to the manufacture and use of these devices.

The invention is based on the problem of making possible a simple, fast and reliable installation of the electrically actuated components of a thread monitoring device, which guarantees a high degree of safety.

This problem is solved by the configuration characterized in claim (1).

Forming the support and the plate as parts that can be connected by means of a bayonet connector to a flat ribbon cable extending into the support rail makes it possible to manufacture these two parts separately and then use them very easily and quickly with the aid of tools. without borrowing
They can be connected to each other avoiding solder joints. Similarly, a connection with a flat ribbon cable leading to the power supply path on the machine side can be easily made. If something goes wrong during use, you can easily replace damaged parts.

The embodiment of claim (2) simply solves the problem of shielding electronic components from external disturbance influences. Instead of a shielded cable, it is better to use a ribbon cable which itself has one more core than is necessary for the electrical connection, and then to this core to connect a metal support rail containing the ribbon cable, i.e. to connect this rail. It is much more advantageous to use it as a shield component. Scope of claims (3)
This embodiment simply ensures a good electrical contact between this core and the support rail, and at the same time ensures a secure fixation of the cable in the support rail.

The monitoring unit assigned to the running yarn can have any structure and operating method. It may be a component that scans the thread mechanically or optically. Similarly, the stopping device or the cutting device, which is switched on by an electric pulse produced during thread breakage, can have any desired construction and method of operation. The number of electrical core connections required for the particular construction and operating method chosen can be easily made by using the corresponding multi-conductor flat ribbon cable. The plate provided with the necessary electric/electronic parts and line connections is protected as shown in claim (4) K, and can be securely fixed in the case by the clamping K. The case can only be closed with a lid when the plate is correctly inserted into it. However, special designs, such as cutouts or protrusions in the plate or case, can force the correct insertion of the plate into the case.

The embodiment of claim (5) reduces by half the number of electrical circuits leading from the machine side power supply circuit to the yarn monitoring device.

This procedure is particularly advantageous if two yarn monitoring devices arranged side by side are assigned to the two yarns coming out of the drafting machine with double top reelers, and one of the yarns and one of the other yarns are placed on each of the monitoring sections. JP-A-58-70 mentioned above, in which a light source directed towards the monitoring section and - a charging cell similarly directed are arranged.
This is a case like No. 720. The signal exchange that is possible by means of a direct cable connection between monitoring devices belonging to one another in pairs can be used, for example, to improve the operating accuracy and maintain the operation of special monitoring units equipped with infrared light sources. On each of the plates an automatically actuated control transistor can be arranged, which transistor controls the brightness of the light source assigned to the monitoring section of the respective other support rail via a direct cable connection. control such that the photocell assigned to it is exposed to a brightness that is within its most advantageous operating range. This control compensates for the differences arising from the respective spatial distances between one light source and the charging cell, and also allows an adjustment to the prevailing circumferential brightness. A direct signal exchange can also take place in order to simultaneously activate the restop device or the cutting device when a yarn break is registered at one of the two yarn running points. This is suitable if two spinning stations separated from each other are supplied with material from a common finishing bin.

The design set forth in claims (1) to (4) can be directly applied in drafting machines with a single top roller and also with yarn monitoring devices with monitoring sections of other constructions and methods of operation. However, for the sake of convenience, the present invention will be explained below using a yarn monitoring device and a roving stopping device as disclosed in Japanese Patent Application Laid-open No. 58-70720. Therefore, detailed explanation of the parts known in the above publication will be omitted.

In Fig. 1, l indicates the bottom roller of a spinning machine or drafting machine, on which a pair of threads F/ and F2 run. On top of this bottom roller, a protruding rod propeller (not shown) mounted on a support arm is mounted as is well known. Support rails /I/J and λ' extend along the row of top rollers near the two threads F/ and FJ, and these support rails 2 and 2' are clamped onto the support shaft on the machine side. At the free end of each support rail 2, 2', which is fixed to the side of the fixed roving guide 3, 3', on the support shaft also supports the column of the support arm of the double top four-ra. Thread F/, ?
, 2 monitoring units s and s' are arranged. Each monitoring section consists of a light source t facing the thread and a photoelectric self that receives the light from the light source that crosses the thread. The photoelectric cell of the monitoring section S' monitors the light from the light source, and the photoelectric cell of the monitoring section S' monitors the light of the light source! The photoelectric cell receives and monitors the shadows of the threads F/ and F2.For details, please refer to the above-mentioned publication. On each support rail there is a roving stop r, r', which is a monitoring part!
.

S' is actuated by an electromagnet, not shown, which is switched on in the event of thread breakage. In addition, a roving holder 9, 9' is also arranged on each support rail in front of the roving stop device in the running direction of the thread, which is mechanically connected to the roving stop device and prevents the roving from stopping. They are simultaneously actuated by a stop device (this is explained in Japanese Patent Laid-Open No. 57-133224).

The electrical components of these devices are connected together in the inventive method described below.

The metal support rails 2, 2' are U-shaped in cross section and have two legs pointing downward. As can be seen in Figure 2, support rail 2
A wall IQ extends inside, and this wall 10 receives a duct with a rectangular cross-section // for passing the cable /4 inside the support rail, and the mechanical parts of the roving stop and the roving holder. It is divided into an upper and lower parts chamber 12 having an inverted U-shaped cross section.

A plastic holder 73°/3' is fixed to the end of the support rail 2.2' assigned to the draft machine outlet, into which a generally plate-shaped monitoring part j' is fitted and pushed, for example a bolt Fix it with.

In Figure 1, the monitoring part S' is fixed in the holder/3'.
.

However, the monitoring part S shown in some places is still in the holder 13.
It is shown without being pushed inside.

Through this cross section, you can see the bins /l fixed in the monitoring part j, and those four bottles are the monitoring part! It is conductively connected to the light source and photocell inside. This pin ltI forms part of the bayonet connector, the socket 7.1 in the other part of the connector being used for the cable connection of the support rail 2) // of the multi-conductor flat ribbon cable 16 laid in the It is secured to one end using a known crimping technique. The bottle /44 is socketed when the monitoring unit S is pushed into the holder 13)/,! tK is inserted and electrically connected.

The ribbon cable 16 laid inside the support tray A/2, 2' supports the electrical components of the monitoring parts j, j'.
This plate 20, 20' supplies power to all parts, and is connected to the electromagnet that operates the roving stop device and roving holder when a thread cut signal is issued, for example, to analyze the received pulse. They support electrical components and circuits that provide switch pulses and switch on lamps that indicate failure.

In FIG. 1, one plate 20' is shown in a state where external pressure is drawn from the case 2/', and the lid n' of the case 2/' is open. On the other hand, the other plate 20 is placed inside the case 2/, and the lid n is closed.

The support rails J, 2' extend into the case 21, 2/' and are connected to the case. case the plate
Lid n only when accommodated in the specified manner.

n′ can be properly closed. Two pins on each plate 20.20' for connecting components and circuits.
Among the pins 25, 2tI and 23', 214', the pins 23, JJ' face the support rails 2, 2', whereas the pins 211, 2u' face the cases 2/2, 2'.
/' in the area of the opening in the rear wall, through which the sockets 2j, 2s' are connected to the pins 21t, ,
24! ' can be fixed. Sockets n and x' can be cut and tightened using known techniques and attached to a common multi-wire ribbon cable connector.This cable 26 is connected to a power feed line (not shown) installed in the machine as shown by the arrow. is familiar with

Each plate can be connected to the power supply on the machine side by a cable, but as shown, the plate assigned to the support arm containing the double top roller can be connected to the two sockets 2! , #' can be connected to the power supply line by means of a common cable 26.

The other pin of plate, 20, 20', 27, 2
5' together with the sockets 27, 27' attached to the ribbon cables /4, /4' extending from the ends of the support rails 2, 2' on the case side form a plug connector, which is connected by being plugged. These sockets 27, 27' and #,
2J', #, 21' and 2ψ, u' are 27 and 211
, 25 and pin n were arranged so that they could not be connected to the same pressure by mistake. Near the winding connectors 23 and 271, 23' and 27', there are light emitting diodes U,! on the plate 20 and 21'. is placed and lights up when the thread breaks. In order to make this lighting easier to see, the lids 22 and 22' are made translucent and colored, for example, red.

The sockets 27 and 27' are loosened for attachment and detachment to the pins U and 23'. Furthermore, to prevent the cable from twisting, it is preferable to secure the cable within the support rail. This fixation can be easily achieved using a wedge-shaped clamp piece 31 introduced into the duct. It is particularly advantageous to take another measure at the same time.

That is, since the components of the supply/analysis circuit are susceptible to external interference, it is desirable to electromagnetically shield the relatively long cable between the monitoring section and the plate.

To create this electromagnetic shield, ribbon cable/4
, /4' is placed in the duct) Use the metal wall of //. As can be seen in FIG. 2, the end of the ribbon cable 16 coming out from the end of the support rail 20 on the case side has more core wires than the part laid inside the duct. Attach the spring contacts 2 to the end of this extra core wire 16a, push them into the notch 30 of the wedge-shaped clamp piece 31, and attach the spring contacts 2 to the end of the extra core wire 16a. After pulling it into the duct //, push it into the duct // and tighten the cape lv/4 inside the duct // to fix it. The surface of the clamp piece 31 facing the cable /4 may be provided with saw teeth to securely fix the table. When the clamping piece 31 is pressed in, the spring tongue 32 of the spring contact λ is electrically connected to the inner surface of the support rail 2. Since the core s16a is connected to one of the contacts of the bayonet connector J7, #, the deflection effect of the support rail λ can be utilized on the plate 20. ' The ribbon cable making the connection with the power supply on the machine side can contain more core wires than are necessary for the supply and signal exchange between the monitoring device on the machine side and the thread monitoring device. As mentioned at the beginning of the description, the extra core wires can be used in the area between the two sockets 8 and 2s' for direct signal exchange between the parts arranged on the two plates 20 and 20'.

As shown in FIG. 3, the openings on the rear wall of the cases 2/, 1' and facing the bins 4 (2u') are covered with covers 35 pivoted to the shafts 3' of the cases. It has become.

In this embodiment, each cover 35 incorporates a leaf spring 33 which is bent in a complicated manner as shown in FIG. When the opening is closed with the cover, the cut-out claw 37 on the other end of the leaf spring hooks against the back of the edge of the opening, and the cover 35 is held in the closed state. Fixed to tahin review, review 'K connected socket 21, 2! Push r' toward the bottle and tighten it to prevent the connection from accidentally disconnecting. K open cover 35
Push the other end of the leaf spring protruding outside the cover with a tool or the like to remove the claw 37 from the edge of the opening. In FIG. 3, a solid line indicates a state in which the opening is closed with the cover 3 closed, and a broken line indicates a state in which the cover is opened.

``/Care) 2!, 2!' are attached to the ribbon cable 26 at intervals that match the maximum width of the machine pitch. Therefore, when the width of the machine pitch is narrower than that, the cables 2!, 2!' are attached to the ribbon cable 26 at intervals that match the maximum width of the machine pitch. Connect the ribbon cable 26 to the socket 21,.2
After j', turn back as shown as house, force t< -i
Close s, is' and use the leaf spring 33 to press the folded part of the ribbon cable against the rear end of the socket, case 2/-
, 2j', it is preferable to eliminate slack in the ribbon cable 26.

[Brief explanation of drawings]

Figure 1 is a perspective view of the support for the double top four-ra of the draft machine and a pair of thread monitoring devices installed on the load arm. Figure 2 is an enlarged view of the part of the support rail circled in Figure 1. 3 is a cross-sectional view of the rear part of the case housing the plate and a side view of the cover, 4th is a cross-sectional plan view of a part of the same as above including the ribbon cable, and 5 is a longitudinal side view of the cover and spring. It is a diagram. In the figure, λ and λ′ are support rails, ! , 5' is the monitoring section, /4
1 and 15S2J and 27.2II and 8 are plug connectors, 1
6°/4', 26 is a flat ribbon cable, 20
, 20' indicates a plate.

Claims (6)

[Claims] (1) A monitoring unit assigned to each running thread and providing an electric pulse to stop the advance of the material in the event of thread breakage or to activate a cutting device, which monitoring unit is connected to the top roller row. located on a support rail fixed to the fuselage extending along the support rail and connected by cables extending through the support rail to structural and switching parts of the stopping or cutting device also located on the support rail; In a yarn monitoring device for a spinning machine or a drafting machine, which is connected to a power supply line laid in the machine body by a cable coming out of the support rail, the monitoring unit 5 connects the ribbon cable extending into the support rail 2 with plug connectors 14 and 15. 16, and to this ribbon cable 16 is connected a plate 20 which is likewise supplied with plug connectors 27, 23 and supports the electrical components of the analysis circuit; A yarn monitoring device for a spinning machine or drafting machine, characterized in that one part 24 of 25 is arranged, and the other part 25 is fixed to a ribbon cable 26 that makes a connection to a power supply line installed in the machine body. . (2) In order to electrically shield the ribbon cable 16 extending in the support rail 2, one of its core wires 16a is in conductive contact with the metal support rail 2.
) thread monitoring device. (3) A spring contact 29 is installed on the core wire 16a to make a connection with the support rail 2, and the spring contact and the support rail 2 are connected to each other.
A thread monitoring device according to claim 2, wherein contact with the ribbon cable 16 is ensured by a clamping piece 31 inserted into the support rail and mechanically supporting the ribbon cable 16. (4) The plate 20 is provided with a lid 22 and is inserted into a case 21 connected to the support rail 2 in a form-locking manner. Device. (5) In order to connect the two plates 20, 20' with one ribbon cable 26, two sockets 25, 25' are fixed to the ribbon cable.
Both plates 20, 2 are placed between both sockets 25, 25' of 6.
A yarn monitoring device according to any one of claims 1 to 4, in which a core wire extends for direct signal exchange between 0' and 0'. (6) A thread monitoring device in which the ribbon cable 26 is pressed into the plug-in socket 25 by a rotatable spring 33 fastened to the case 21.