JP2000090756A - Coating adjusting device of wire and bar body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To normally confirm/detect the presence or absence of generation of a thickness deviation part and to correct the thickness deviation part if this thickness deviation part is generated by changing a relative location of a nipple and a die so as to absorb thickness deviation when a coating film is coated on a surface of a wire and bar body while the wire and bar body passes through the nipple and the die, thickness of the coating film is measured and thickness deviation is detected from measured data. SOLUTION: A coating adjusting device of an optical fiber (wire and bar body) 5 is provided with a film thickness measuring sensor 2 and a fine motion mechanism 4 to be controlled by an output of the film thickness sensor 2 via a control part in a coating device 1. The fine motion mechanism 4 is provided with a Y-moving body 12 which is finely adjusted in a Y-direction by a base 11, an X-stage 13 which is finely adjusted in an X-direction for the Y-moving body 12 and a nipple N according to a die D on a lower part of the X-stage 13. When the film thickness measuring sensor 2 optically detects thickness deviation of a coating film such as UV resin coated on the optical fiber 5 from X, Y directions and detects generation of thickness deviation, the fine motion mechanism 4 is operated/controlled via the control part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents the occurrence of uneven thickness in a coating film when the coating film is coated on the surface of a striated body such as an optical fiber while running and passing the same. The present invention relates to an apparatus for adjusting the covering of a striatum.

[0002]

2. Description of the Related Art For example, in order to coat an outer peripheral surface of an optical fiber with a protective film, various coating apparatuses have been developed and used as is well known.

[0003]

However, in this coating apparatus, there may be a case where the thickness of the protective film covering the periphery of the optical fiber is uneven and the thickness of the protective film is uneven. No special measures have been taken to prevent it.

In view of the above-mentioned drawbacks, the present invention constantly checks and detects the presence or absence of an uneven thickness portion, and corrects the occurrence of the uneven thickness portion, if any, to compensate for the occurrence of the uneven thickness portion. It is intended to provide a device.

[0005]

That is, the present invention provides:
In a striated body coating apparatus that has a nipple and a die at the center where the striated body travels and passes, and coats a coating film on a surface of the striated body passing through the nipple and the dice, A film thickness measuring sensor for measuring the thickness of the coating film, a control unit for detecting the presence or absence of uneven thickness from data measured by the thickness measuring sensor, and the control unit absorbs the uneven thickness when detecting the uneven thickness. And a fine movement mechanism for changing the relative position between the nipple and the die.

[0006]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an optical fiber coating adjusting device according to the present invention. This optical fiber coating adjusting device is connected to a film thickness measuring sensor 2 and an output of the film thickness measuring sensor 2 in a coating device 1. And an XY fine movement mechanism 4 whose operation is controlled by the control unit 3. Reference numeral 5 denotes an optical fiber.

[0007] The coating apparatus 1 is generally composed of the following three members for convenience of installation of the XY fine movement mechanism 4.
That is, a base 11 which is set in an immobile state after being adjusted to the initial position, a Y moving body 12 which is finely moved in the base 11 and finely adjusted in the Y direction by a Y moving mechanism, and a Y moving mechanism An X stage 13 that is finely adjusted in the X direction with respect to 12 is provided, and a nipple N is provided below the X stage 13 in accordance with the die D.

The film thickness measuring sensor 2 determines whether or not the film thickness of the coating film such as the UV resin coating the optical fiber 50 is uneven (uneven thickness) from the optical direction 2 (X, Y). Is to be detected. The film thickness measuring sensor 1 of this embodiment
A light projecting unit 2A using an ED (light emitting diode) and a CC for receiving a light from the light projecting unit 2A and outputting a predetermined signal
It comprises a light receiving section 2B using a D line sensor, and these are arranged in the 2 (X, Y) directions.

As shown in FIG. 3, the control section 3 always receives light receiving signals output from each light receiving section 2B of the film thickness measuring sensor 2, and based on these signals, forms a coating film in the XY2 directions. Irregularity of thickness, that is, presence or absence of uneven thickness is detected. The controller 3 operates and controls each motor of the XY fine movement mechanism 4 as soon as the occurrence of uneven thickness is detected. Further, the control unit 3 stops the operation of the XY fine movement mechanism 4 when it is confirmed that the occurrence of uneven thickness is suppressed by the feedback control from the film thickness measurement sensor 2.

As shown in FIG. 2, the XY fine movement mechanism 4 includes a base 11 on which a die constituting a main body of the coating apparatus 1 is housed.
A Y fine movement mechanism 4Y for finely moving the Y stage 12 in the Y direction, and an X fine movement mechanism 4X for finely moving the X stage 13 in the X direction with respect to the Y stage 12 (base 11).

That is, the X fine movement mechanism 4X is
And a guide shaft 41 and a ball screw 42 that are screwed into the female screw portion 13A provided on the X stage 13 and a first motor 43 that drives the ball screw 42. On the other hand, the Y fine movement mechanism 4Y is similarly installed on the base 11,
A guide shaft 44 and a ball screw 45 screwed into the female screw portion 12 </ b> A provided on the Y stage 12, and a second motor 46 for driving the ball screw 45 are provided.

Therefore, according to this embodiment, for example, FIG.
As shown in FIG.
When the control unit 3 finds the uneven thickness portion deviated in the direction, only the second motor 46 of the Y fine movement mechanism 4Y of the fine movement mechanism 4 is operated, and the Y stage 12 starts minute movement in the −Y direction. Thereby, the X stage 1 is integrated with the Y stage 12.
3 also moves in the same direction, so that the nipple N provided on the X stage 13 is, as shown in FIG. 5 (for convenience of explanation, the size of the nipple N is exaggeratedly smaller than the die D). The movement from the broken line position to the solid line position is started.

As a result, the film thickness of the coating film 5A coated on the optical fiber 5 is increased at the portion in the + Y direction, so that the film thickness is adjusted to be substantially uniform over the entire circumference. When this is measured by the film thickness measuring sensor 2, the control unit 3 confirms that the occurrence of uneven thickness has been suppressed and stops the control signal, so that the operation of the Y fine movement mechanism is immediately stopped. In this embodiment, the thickness deviation in the Y direction has been described. However, the X fine movement mechanism and the Y fine movement mechanism are appropriately operated according to the thickness deviation in the X direction and the thickness deviation in the X and Y directions. Can absorb uneven thickness.

[0014]

As described above, according to the present invention, according to the present invention, there is provided a film thickness measuring sensor for measuring the thickness of a coating film of a striatum, and the presence or absence of uneven thickness based on data measured by the film thickness measuring sensor. And a fine movement mechanism that changes the relative position between the nipple and the die so as to absorb the thickness deviation when the controller detects the thickness deviation. -It is possible to detect and correct the occurrence of uneven thickness portions, if any, so that a high quality striated body can be manufactured.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an optical fiber coating adjusting apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing a main part of a coating adjustment device.

FIG. 3 is a block diagram showing an electrical configuration of the coating adjustment device.

FIG. 4 is a cross-sectional view showing an uneven thickness state of a coating film of the optical fiber.

FIG. 5 is an explanatory view showing the operation of the coating adjustment device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coating apparatus 2 Thickness measurement sensor 3 Control part 4 Fine movement mechanism 4X, X fine movement mechanism 4Y, Y fine movement mechanism 5 Optical fiber (striatum) 5A Coating film

Claims (1)

[Claims] 1. A striated body (5) having a nipple (N) and a die (D) through which a striated body (5) travels and passes, the striated body being passed through the nipple (N) and the dice (D). 5) A coating device for a striatum that coats a surface with a coating film, wherein: a film thickness measurement sensor (2) for measuring the thickness of the coating film of the striatum (5); A control unit (3) for detecting the presence or absence of uneven thickness from the data measured in (2); and when the control unit (3) detects uneven thickness, the nipple (N) and the die ( A fine movement mechanism (4) for changing a relative position with respect to D), a coating adjustment device for a striatum.