JPS5826423Y2 - Lead wire seal device outer diameter change detection device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for detecting a change in the outer diameter of a lead wire used in a cable vulcanization device.

In so-called continuous vulcanizing equipment, in which an extrusion-coated cable is guided into a vulcanizing tube and vulcanized using high-pressure steam, etc., the lead wire is used to reduce cable waste at the start of operation. is commonly used.

FIG. 1 shows an example of a conventional means for sealing a lead wire 1a, a connecting portion 1b, a cable core 1C, etc., and detecting a change in the outer diameter of the lead wire 1a and the cable core 1C. 1a passes through the sealing hole 5 of the packing 4 of the cable sealing device 3 at a distance while being immersed in the sealing medium injected into the communication pipe 2, and then is sent in the direction of arrow A to the conduit 6. This outer diameter dimension is detected by a detection piece 7 rotatably attached to the sensor, and the limit switch 8 is operated by the rotation of this detection piece 7, and the lead wire sealing device 9 is opened by this operation signal. (2) The sealing action of the lead wire 1a by the seal 10 is released.

By the way, according to this means, the position of the detection piece 7 when the limit switch 8 is operated is the same as that of the limit switch 8.
is always constant unless the mounting position is changed. Therefore, if you prepare several types of lead wires 1a in advance according to the size of the cable core 1C to be manufactured, and use these separately, the operating point of the limit switch 8 It is necessary to open the lead wire sealing device 9 in a timely manner by changing the timing.

However, depending on the size of the lead wire 1a,
For example, if we take measures to change the mounting position of the limit switch 8, each time the size is changed, the limit switch 8
It is very troublesome to change the mounting position of the lead wire sealing device 9, and due to an adjustment error or incomplete fixation, there is a risk that the lead wire sealing device 9 may become misaligned after the mounting work, resulting in problems such as the lead wire sealing device 9 not being opened accurately. was there.

This idea was made in view of the above circumstances, and its purpose is to electrically detect the difference in outer diameter between the lead wire and the cable core, operate the lead wire sealing device, and To enable accurate operation of a lead wire seal device even if the outer diameter size with respect to a cable core changes.

This invention will be described in detail below based on embodiments shown in the drawings.

Fig. 2 is an explanatory diagram of the configuration of the first embodiment of this invention, in which reference numerals 11a, 11b, and 11C represent lead wires, connection parts, and cable cores, and numeral 12 represents lead wire 11a and cable core. This is a detection piece that detects changes in the outer diameter of the core 11C, etc.

Further, reference numeral 13 is a rotary encoder, and the detection piece 12
It is attached to the shaft of the sensor and outputs the rotation angle by converting it into an electric pulse signal, and when the detection piece 12 rotates clockwise, a pulse signal CW consisting of a number of pulses proportional to the rotation angle is output. The reversible pulse counter device 1 outputs a pulse signal CCW consisting of a number of pulses proportional to the rotation angle when the detection piece 12 rotates counterclockwise.
Supply to 4.

The reversible pulse counter device 14 includes a reversible counter circuit 15 that counts up the pulse signal CW supplied from the rotary encoder 13 and counts down the pulse signal CCW, and a preset switch 16 that sets a set value in advance using a digital switch or the like. It is comprised of a matching circuit 17 that compares the count value of the reversible counter circuit 15 and the set value of the preset switch 16, and outputs a signal to operate the lead wire sealing device when they match.

The operation of this device constructed in this way will be explained.

If the J-wire 11a is being sent in the direction of the arrow in FIG. 2 and the detection piece 12 is detecting the outer diameter of the lead wire 11a, then The rotary encoder 13 outputs a pulse signal proportional to the movement angle (with respect to the value where the outer diameter is 0).

At this time, if the reversible counter circuit 15 of the reversible pulse counter device 14 is reset and the preset switch 16 is set to the required value, the detection piece 12 will be in a state where it is detecting the outer diameter of the lead wire 11a. In this case, the output signal of the reversible counter circuit 15 is zero, and there is a clear difference from the set value of the preset switch 16, and no signal is output from the matching circuit 17.

Next, the connecting part 11b is sent in the direction of the arrow in FIG.
When the detection piece 12 detects the outer diameter, a signal corresponding to the change in outer diameter is output from the reversible counter circuit 15,
It is compared with the setting value of the preset switch 16.

The detection piece 12 rotates by the required angle following the outer diameter of the connecting portion 11b, and the rotary encoder 13 converts the rotation angle, and when the reversible counter circuit 15 matches the date of the preset switch 16 ( (or at the moment of overmatch), the matching circuit 17 outputs a signal,
The lead wire seal device will be opened.

That is, in this first embodiment, the lead wire 11 a
and the cable core 11C (radius change of the connecting portion 11b) is detected, regardless of the thickness of the lead wire 11a.

Further, the detection piece 12 detects the outer diameter of the lead wire 11a and after a certain period of time has elapsed, the reversible counter circuit 1
It is also possible to automatically reset 5.

On the other hand, FIG. 3 shows a second embodiment of this invention, in which when the lead wire 11a is being fed in the direction of the arrow shown in the figure, if there is a deflection in the vertical direction as shown in the figure, the deflection is The two detection pieces 12.12 and the two rotary encoders 13.13 are respectively provided in the direction of , and the outputs of the two rotary encoders 13.13 are added and subtracted by the arithmetic circuit 18. It was processed in the same way.

In this second embodiment, since the two detection pieces 12.12 cancel each other out, more sensitive detection is possible without detecting the deflection of the lead wire 11a.

Further, in this second embodiment, two detection pieces 12.
Since it is possible to set the state in which the wires 12 are in contact with each other to zero, the lead wire 11a or the cable core 11
It is also possible to detect the absolute value (diameter) of C and perform management using the absolute value via the arithmetic circuit 18 or management using the outer diameter ratio.

As detailed above, this invention electrically detects the difference in the outer diameter of the lead wire and cable core, standardizes the state in which the outer diameter of the lead wire is detected, and changes with respect to this standard. Since a signal is generated to operate the lead wire sealing device depending on the amount, even if the outer diameter of the lead wire changes from line to line, it can be automatically handled, making it easy to adjust each line change. This method has the advantage of not requiring any additional steps and ensuring reliable operation.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of the main parts showing one conventional embodiment, Fig. 2 is a structural explanatory diagram showing the first embodiment of this invention, and Fig. 3 is a structural illustration showing the second embodiment of this invention. It is a diagram. 11 a...Lead wire, 11 b...
...Connection part, 11 C...Cable core, 12
......Detection piece, 13...Rotary encoder, 14...Reversible pulse counter device, 15...Reversible counter circuit,
16...Preset switch, 17...
・-Number circuit.

Claims (1)

[Scope of utility model registration request] A detection piece that detects the outer diameter of the lead wire and cable core, a rotary encoder attached to this detection piece that converts the rotation angle into an electric pulse signal, and a detection piece that detects the lead wire and the cable based on the output signal of this encoder. A change detection device for an outer diameter of a lead wire seal device, comprising a reversible pulse counter device that detects a difference in outer diameter of a core and outputs an electric signal for opening the lead wire seal device when the difference in outer diameter is detected. .