JPH03260124A - Flyer for roving frame - Google Patents

Abstract

PURPOSE:To obtain the subject flyer capable of directly detecting the winding tension of a roving to be wound on a bobbin and having excellent determination accuracy of tension by attaching a tension-detecting element to a presser. CONSTITUTION:Tension of a winding roving is detected by pasting a strain gauge 7 on the arm of a flyer 1 having a leg 1a for winding a roving and a presser 3, connecting the strain gauge 7 to a Wien bridge and fixing a disk 9 holding coils 10, 10' of the bridge to a spindle part 2.

Description

[Detailed description of the invention] Industrial applications This invention relates to a flyer for a roving frame.

Conventional technology Conventionally, in a flyer-type roving frame, a detection unit for measuring the winding tension was provided between the front roller of the drafting device and the flyer, and changes in the tension of the roving between the front roller and the flyer were detected. (See, for example, Japanese Patent Publication No. 56-25525 and Japanese Unexamined Patent Application Publication No. 62-8979.).

Problems to be Solved by the Invention Before the roving enters the flyer cap from the front roller of the drafting device and is wound onto the bobbin, it comes into contact with various parts of the flyer such as the cap, astragalus, and presser, and there is a gap between them. Since there is a considerable amount of roughness, the conventional measurement of winding tension using a detection unit provided between the front roller and the flyer has the problem that satisfactory results cannot be obtained.

This invention was made to solve these problems, and an object thereof is to provide a flyer for a roving machine that can directly detect the actual winding tension of the roving thread wound around the bobbin. It is said that

Means for Solving the Problems In order to achieve the above object, the present invention provides a flyer for a roving frame in which a tension detection element is attached to a presser.

Note that a strain resistance element or a piezoelectric element is suitable for this tension detection element, and in the case of a piezoelectric element, it may be provided in the roving passage of the presser.

Since the force exerted on the presser by the roving that is wound around the presser and passes through it is directly detected, the winding tension of the roving that is wound on the bobbin can be directly measured, greatly improving measurement accuracy. can be improved.

Embodiment FIG. 1 shows the main parts of a roving frame to which the flyer for a roving frame of the present invention is applied, and the roving R from a drafting device (not shown) is shown in FIG.
is guided to the cap 2a of the flyer 1, passes through the leg 1a, is wound around the presser 3 several times, and is wound onto the bobbin B while being squeezed, as in a conventional roving frame. Flyer 1
and bobbin B are driven by their respective drive systems, and bobbin B
The roving is wound by a so-called bobbin reed, which rotates at a high speed. A disc 9 is attached to the spindle part 2 of the flyer.
is fixed to the disk 9, and the strain resistance element 7 of the arm 3 is fixed to the disk 9.
(Fig. 2) to form the Vienna Bridge.
The change in resistance of the strain resistance element 7 is expressed as a change in frequency, and this signal is taken out by the coil 11 and input to the controller C of the motor M of the transmission S of the roving machine.

The rotational speed of the bobbin B is changed by the transmission S, and a desired shinumaki is formed.

FIG. 2 shows the fryer of this invention, with presser 3
A strain resistance element 7 is affixed to the arm portion of the arm at a portion that receives the most stress due to the progress of the roving.

Note that 4 is a support portion of the presser 3. As the strain resistance element 7, an electric resistance wire strain gauge or a semiconductor conversion element, which is commonly known as a strain resistance element, can be used.

In the disc 9 shown in FIG. 3, the coil section 10.10' of the Wien bridge is shown. The lien bridge is shown in FIG. 4, where the coil 112 is connected to the coil section 10'
Compatible with 10 coils.

As is known, the equilibrium condition of the bridge is C3/C
, =R2/R, -R4/R, and the change in R can be easily extracted.

Note that R) and R4 are the resistances of the strain resistance element 7 attached to the presser 3.

Now, when the pressure setting device 15 oscillates a high frequency corresponding to the pressure, this frequency is energized to the coil L, and induces a voltage in the Wien bridge coil 11 of the disk 9. If the frequency determined by the internal constant matches the added frequency, the frequency generated in the coil 12 will be the same as the added frequency and can be taken out to the external coil L2. After amplification by the amplifier 12, the electrically shifted 90° is returned by the phase shift amplifier 13 and compared with the added frequency. If the frequency deviates, the frequency generated at 12 will deviate, so by comparing that deviation with the applied frequency, you can find out the lead/lag and magnitude of the deviation, in other words, you can judge whether the pressure is strong or weak. It can be input to the detection section 14 of the controller C.

When the motor M of the transmission is controlled by the signal from the detection unit 14, there is no illegal draft in the wound roving, and it is possible to obtain a shinomaki in which the roving is wound as designed.

FIG. 6 shows an example in which a piezoelectric element 8 is used as the tension detection element. The piezoelectric element 8 is bonded to a portion forming a so-called presser eye 6 of the battledore portion 5 of the presser 3 and coated with resin.

Note that in all of the above examples, signals are taken out from the tension detection element without contact, but it is also possible to directly connect to the spindle 2 or attach a metal rotating body such as the disk 9 to the flyer (spindle, etc.). In this case, the signal can be extracted using a brush, and the winding tension can be measured with high accuracy in this case as well.

Effects of the Invention According to the present invention, since the force directly applied to the presser by the roving being wound can be detected, the actual winding tension can be measured with extremely high accuracy.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a main part of a roving frame to which the flyer for a roving frame of the present invention is applied, FIG. 2 is a front view of a flyer for a roving frame showing an embodiment of the invention, and FIG. FIG. 4 is a circuit diagram of the flyer for a spinning machine, FIG. 5 is a circuit diagram for measuring the winding tension in the roving machine shown in FIG. 1, and FIG. FIG. 2 is a plan view of a main part of an embodiment different from the embodiment shown in the figure. 1... flyer for roving frame, 1a... leg, 2...
・Spindle part, 2a... Cap, 3... Presser, 5... Battledore part, 6... Presser eye, 7...
Strain resistance element, 8... Piezoelectric element, 9... Disc, 10.
10'...Coil, B...Bobbin, C...Controller, F...Front roller, M...Motor, R...
Roving, S...Transmission device Fig. 2 Fig. 3 7 parts Fig. 1 beginning 4 Fig. 6

Claims (3)

[Claims] (1) A flyer for a roving frame in which a tension detection element is attached to a presser. (2) The flyer for a roving frame according to claim (1), wherein the tension detection element is a strain resistance element. (3) The flyer for a roving frame according to claim (1), wherein the tension detection element is made of a piezoelectric element and is attached to the roving passage of the presser.