JPS6326371Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention detects entanglements and abnormal thicknesses that occur in the traveling fiber group during the process of collecting, stretching, or winding fibrous materials such as tows, webs, or sheet-like materials. It is related to the device.

Conventionally, in order to detect knots in traveling fiber bundles such as tows, because the thickness changes are large, a method of detecting knots by attaching a limit switch directly to a guide that comes into contact with the fibers has been adopted. In this method, since the operating range of the limit switch is constant at a certain value, there is a problem in detecting minute changes. Commercially available optical thickness gauges are also known for detecting abnormal thickness when the web or sheet-like material is being stretched or wound at a relatively slow running speed. However, such an optical thickness meter is not suitable for detecting extremely large instantaneous thickness changes or for detecting the thickness of a group of fibers traveling at a relatively high speed.

The present invention solves these problems, sensitively detects minute changes in the thickness of fiber groups, and can detect knots, tangles, and abnormal thickness of tows, webs, or sheets even in processes with relatively high running speeds. It provides a device with the following configuration.

That is, the present invention includes a detection guide that is swingably disposed close to the traveling path of a fiber bundle, etc., and a detection guide that is attached to one end of the detection guide via a rotatable joint for detecting the displacement of the detection guide. and a differential transformer, the detection guide is oscillated in response to changes in the thickness of the traveling fiber bundle, etc., and the displacement amount corresponding to the oscillation of the detection guide is detected by the differential transformer to detect thickness abnormalities. The present invention relates to an abnormality detection device for fiber bundles, etc., which is configured to detect.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is an overall perspective view of an abnormality detection device according to the present invention, Fig. 2 is an arrow view of the A side of the inventive device shown in Fig. 1, and Fig. 3 is a B side view of the inventive device shown in Fig. 1. It is a schematic diagram seen from the surface. In Fig. 1, reference numeral 1 denotes a fixed stand of this device, and 2 has a base attached to the fixed stand 1, and two legs 2', 2'' are placed on the upper side at a predetermined interval in the running direction of the fiber bundle. 3 and 3' are a pair of presser guides for holding down running fiber bundles, etc., which are provided at predetermined positions in the center of the legs 2' and 2'', and 4 is a center of the plate 2. This is a receiving plate attached to a predetermined position for receiving a traveling fiber bundle, etc.

Reference numeral 5 denotes a rotary plate rotatably supported via a shaft 6 at the tip of the foot 2' of the plate 2 on the fiber bundle entry side, and a stopper 7 is provided at a predetermined position on the outer surface above the fiber bundle. The rotating plate 5 is stopped at the position shown in FIG. 1 by engaging the stopper 7 with the upper end of the foot 2''. Reference numeral 8 designates an air cylinder provided on the fixed stand 1 for rotating the rotating plate.

9 is a shaft of a predetermined length that is rotatably supported on the rotating plate 5 via a bearing 9'; 10 is a lever 11 attached to the shaft;
A predetermined length of sensing guide attached through the
It is made to be able to swing freely around a shaft 9. 12 is a screw for adjusting the level of the detection guide provided on the plate 2, and 13 is a wade for adjusting the weight of the detection guide that is detachably mounted on the rear end side of the shaft 9.

Reference numeral 14 denotes a differential transformer which is swingably supported at a predetermined position on the rotary plate 5 above the detection guide via a bearing 15 and a shaft 15', and its lower detection end is rotatably supported at the rear end of the detection guide 10. 16.

The operation of the above detection device is as follows.

The traveling tow or sheet-like object is made to travel horizontally by the presser guides 3 and 3' and the receiving plate 4. The thickness of the sheet-like object during normal travel is constant, and the detection guide 10 is normally lifted up by the adjustment screw 12 by a gap (δ in FIG. 4) so that it does not come into contact with the sheet-like object. When the sheet-like object whose thickness has changed more than this gap δ passes, the detection guide 10 is swung upward about the rotating shaft 9 as a fulcrum. At this time, the detection guide 10 that is momentarily pushed up operates to push up the shaft of a differential transformer 14 that is rotatably attached to one end and is capable of instantaneously detecting at least 0.1 mm or more. That is, the differential transformer 14
The joint 16 at the tip of the detection guide 10 moves integrally with the swing locus of the detection guide 10, centering on the detection guide 10. The signal detected by the differential transformer regarding the amount of displacement of the detection guide 10 pushed up can be used, for example, to record changes in the thickness of the sheet material on a chart and use it for quality control, or to send an alarm to notify abnormal thickness. By incorporating a circuit that instantly stops the operation of the process, it is effectively implemented for process control.

Next, we will explain how to pass fiber bundle tows and sheet-like objects through this device.

First, from the state shown in FIG. 1, the air cylinder 8 is operated to move the rod forward and rotate the rotary plate 5 to the position shown by the two-dot chain line in FIG. At this time, a notch 17 is provided in the rotating plate 5 to prevent the detection guide 10 attached to the tip of the operating transformer 14 from rotating more than necessary.
is provided, and the detection guide 10 is similarly lifted up by being stopped there. In this state, when the air cylinder changeover switch (not shown) is turned off after passing the sheet-like object, the rotary plate 5 descends and the detection guide 10 similarly descends until it hits the adjustment screw 12. Thereafter, the rotary plate 5 descends until the stopper 7 attached to one end hits the plate foot 2'' and stops at the fixed position.Furthermore, the shaft end of the air cylinder comes to rest at a position slightly away from the rotary plate 5.This rotation It goes without saying that the means for swinging the plate 5 is not limited to an air cylinder, and other means may also be used.However, in order to soften the shock when the actuating transformer rises and falls, the rising and falling speed can be adjusted as desired. Of course, a speed controller (not shown) is attached.

Next, an example of the use of the device of the present invention will be described. Fifth
The figure shows the device of the present invention installed on the exit side of the stretching draw in order to detect subtow entanglement in a staple drawing machine.
The drive of the drawing system is stopped just before the tow tangle enters the crimper. With the conventional limit switch method, it was not possible to detect all subtow entanglements, and the unresolved entanglements entered the crimper in a stretched state, causing trouble and making the crimping unstable. In this case, the stretching speed is 100m/
Even under tow running conditions of 400,000 D, it is possible to completely detect changes in thickness due to entanglements down to a minimum of 0.2 mm, making it possible to eliminate problems with the crimping device.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of the detection device according to the present invention;
Figure 2 is a view in the direction of the A arrow in Figure 1 ((back side), Figure 3 is a view in the direction of the B arrow in Figure 1 (side view), Figure 4 is a partially enlarged view of the present invention, and Figure 5 is the present invention It is an explanatory view showing an example of use of the device. 2: Plate, 3, 3': Presser guide, 5: Rotating plate, 7: Stopper, 10: Detection guide, 1
2: Level adjustment screw, 13: Adjustment weight, 1
4: Differential transformer.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A detection guide that is swingably disposed close to the traveling path of the fiber bundle, etc., and a detection that is attached to one end of the detection guide via a rotatable joint. A differential transformer for detecting the amount of displacement of the guide is provided, the detection guide is oscillated in response to changes in the thickness of the traveling fiber bundle, etc., and the differential transformer is configured to oscillate the detection guide according to changes in the thickness of the traveling fiber bundle, and to detect the amount of displacement corresponding to the oscillation of the detection guide. 1. An abnormality detection device for fiber bundles, etc., characterized in that it detects abnormalities in thickness. (2) An abnormality detection device for fiber bundles, etc., according to claim 1, wherein the differential transformer and the detection guide are provided via a rotary plate that can be rotatably locked.