JP2513310B2 - Alternating grooved spacer manufacturing equipment - Google Patents

Description

Description: [Industrial application] The present invention relates to a manufacturing apparatus of a spacer having an alternating inversion groove on an outer peripheral surface for accommodating an optical fiber core wire.

[Prior Art] FIG. 3 is an explanatory view showing an example of a spacer with alternate inversion grooves. The spacer 1 with alternate inversion grooves is composed of a messenger wire 2 and a resin 20 extruded around its outer periphery.
Grooves in which the spiral direction is reversed at predetermined intervals on the outer peripheral surface of the resin
21 are formed. The outer circumference of the spacer 1 in which the optical fiber core wire (not shown) is housed in the groove 21 (not shown)
The optical cable that has been subjected to the
It has attracted attention because the extra length required for connection to other optical cables can be obtained simply by picking out the optical fiber core wire from the inversion part of 21, and many proposals have been made for its structure.

However, there is no specific information up to now about the device for manufacturing the spacers with alternating inversion grooves, and the manufacturing device for the spacers with alternating inversion grooves having a highly accurate external shape can be provided at low cost. It was strongly desired.

[Object of the Invention] In view of the above, it is an object of the present invention to provide a manufacturing apparatus for an alternating inversion grooved spacer that can inexpensively manufacture an alternating inversion grooved spacer having a good external shape.

[Summary of the Invention] The gist of the present invention is to provide a delivery machine for delivering a messenger wire, and a resin having a groove on the outer surface of which the spiral direction is alternately inverted at predetermined intervals, is coated on the outer periphery of the messenger wire to form an alternating inversion groove. An extruder provided with a rotary head for forming a spacer with a spacer, a servo motor for driving the rotary head, a winder for winding the spacer with the alternate inversion groove, and an alternate rotor provided in the preceding stage of the winder. In a manufacturing apparatus for a spacer with an alternating reversal groove, which comprises a measuring roll for measuring a winding amount or a winding speed of a spacer with a reversing groove, the alternating reversing groove measured by the rotation amount of the servo motor or the measuring roll. The timing of reversing the direction of rotation of the servo motor is determined from the winding amount of the spacer with a spacer and the spacer with the alternate inversion groove measured by the measuring roll The rotation speed and the rotation speed of the rotary head are controlled by determining the rotation speed of the servo motor in proportion to the winding speed.

[Examples] Examples of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view showing an embodiment of the present invention. The manufacturing apparatus according to the present embodiment has a feeder 3 for feeding the messenger wire 2 and a resin having a groove on the outer surface of which the spiral direction is alternately inverted at a predetermined interval, is coated on the outer periphery of the messenger wire 2 to provide an alternating inversion groove. An extruder 16 provided with a rotary head 4 that forms the spacer 1, a servo motor 7 that drives the rotary head 4, a winder 6 that winds the spacer 1 with the alternating inversion groove, and a winder 6 in front of this winder 6. The measuring roll 5 is provided to measure the winding amount or the winding speed of the spacer 1 with the alternating inversion groove.

The measuring roll 5 rotates in proportion to the speed of the spacer 1 with alternating inversion grooves, and the AC generator 15 connected to this measuring roll 5 generates a voltage proportional to the speed of the spacer 1 with alternating inversion grooves. To do. This voltage is multiplied by the voltage set by the variable resistor 12 in the operational amplifier 11. That is, the variable resistor 12 can determine the proportional constant. Then, it is connected to the signal switching relay 14. This signal is signal switching relay 14
Depending on the switching state, the polarity is inverted and the polarity is inverted and connected to the servomotor control amplifier 10 via the inversion amplifier 13. This polarity reverses the rotation direction of the servo motor 7.

Further, the timing of switching the signal switching relay 14 will be described. The rotary encoder 8 connected to the servo motor 7 generates a pulse proportional to the rotation amount of the servo motor 7, and the counter 9 integrates the pulse. Then, when the cant value reaches a predetermined value, the signal switching relay 14 is switched and the counter is reset.

The spacer 1 with alternating inversion grooves manufactured by such an apparatus has a good groove shape and groove inversion pitch. In addition, an expensive device is not required as a circuit for controlling the rotation of the servo motor 7, and the spacer 1 with alternate inversion grooves can be manufactured at low cost.

FIG. 2 is an explanatory view showing another embodiment of the present invention,
The difference from the embodiment shown in FIG. 1 is that the signal switching relay 14
It depends on where the timing of switching is based. That is, in the above-described embodiment, the signal switching relay 14 is switched depending on the rotation amount of the servo motor 7, but in the present embodiment, the spacer 1 with the alternating inversion groove measured by the measuring roll 5 is used.
It is switched depending on the amount of collection.

First, the rotary encoder 8 is connected to the measuring roll 5. A pulse is generated in proportion to the amount of the encoder 8 and the counter 9 integrates the pulse. Then, when the count value reaches a predetermined value, the signal switching relay 14 is switched and the counter 9 is reset.

In this embodiment, the same effect as that of the embodiment shown in FIG. 1 can be obtained, but the groove accuracy is guaranteed in the previous embodiment, and the pitch accuracy is guaranteed in this embodiment.

[Effects of the Invention] As described above, according to the present invention, it is possible to inexpensively manufacture a spacer with an alternating inversion groove having a good external shape.

[Brief description of drawings]

1 and 2 are explanatory views showing an embodiment of the present invention, and FIG.
The figure is an explanatory view showing an example of a spacer with alternating inversion grooves. 1: Spacer with alternating grooves, 2: Messenger wire, 3: Feeder, 4: Rotating head, 5: Measuring roll, 6: Winding machine, 7: Servo motor, 8: Rotary encoder, 9: Counter, 10: Servo motor control amplifier, 11: Operational amplifier, 12: Variable resistor, 13: Inversion amplifier, 14: Signal switching relay, 15: Alternator, 16: Extruder, 20: Resin, 21: Groove.

Front Page Continuation (72) Inventor Tadashi Aoki 5-1-1 Hidaka-cho, Hitachi City, Ibaraki Prefecture Hidaka Electric Works Co., Ltd. (72) Inventor Akira Tada 5-chome Hidaka-cho, Hitachi City, Ibaraki Prefecture No. 1 No. 1 Hidaka Electric Cable Co., Ltd. Hidaka Factory

Claims (1)

(57) [Claims] 1. A feeder for feeding a messenger wire,
An extruder equipped with a rotary head that forms a spacer with alternate inversion grooves by coating the outer periphery of the messenger wire with a resin having grooves on the outer surface of which the spiral direction is alternately inverted at predetermined intervals, and drives the rotary head. A servo motor, a winder that winds the spacers with alternating inversion grooves, and a measuring roll that is provided in the preceding stage of the winder to measure the winding amount or the winding speed of the spacers with alternating inversion grooves. In an apparatus for manufacturing a spacer with an alternating reversal groove, the timing for reversing the rotation direction of the servo motor is determined from the rotation amount of the servo motor or the winding amount of the spacer with the alternating reversal groove measured by the measuring roll. And by determining the rotation speed of the servomotor in proportion to the winding speed of the spacer with the alternate inversion groove measured by the measuring roll. Serial rotary heads alternately inverted grooved spacer manufacturing apparatus characterized by a the control the rotational direction and rotational speed of the.