JPH01127916A - Measuring instrument for weight of conductor covering material - Google Patents

Abstract

PURPOSE:To measure the quantity and weight per unit length of a material which has covered a cable in the course of running of a covered wire by providing a means for detecting each cross-sectional area of a before-covering conductor of an insulating material, etc., and an after-covering conductor of an insulating material, respectively. CONSTITUTION:When a before-covering conductor outside diameter detector 26 detects a conductor diameter l, a cross-sectional area S0=k.l [(k) is set each time by the number of kinds of a coefficient line] of the conductor is derived by a coefficient multiplier 27, and when the area S0 before covering is known, it is set by a setting device 28. In this case, a switching circuit 25 outputs an output of the setting device 28 to an adder/subtracter 24. Also, an after-covering conductor outside diameter detector 21 measures an outside diameter D of an after-covering conductor, a value D2 is obtained by doubling said diameter by a double computing element 22, a prescribed expression is operated by a coefficient circuit 23 and a cross-sectional area S1 of the after-covering conductor is derived, and a value S0 outputted from the circuit 25 is subtracted in the circuit 24. In such a way, a resin portion cross-sectional area S2 is derived, and resin weight W is derived by multiplying the resin density gamma which has been set by a resin density setting device 28 in advance in a coefficient circuit 30. The value W is brought to A/D conversion 31 and inputted to a computing element 32, and total weight of a covering material of length L is derived by the value L of cable length of a measuring instrument 33 and the value W.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to measuring the weight of insulating material used in an extrusion line, and in particular, to measuring the weight of insulating material used in an extrusion line, and in particular to measuring the weight of insulating material used in an extrusion line. The present invention relates to a weight measuring device that can measure usage fees.

[Conventional technology]

Generally, the specifications of electric wires and cables differ depending on the purpose of use and the place of use. The diameter of the wire, the thickness and material of the insulation material, the thickness of the sheath, and the diameter of the final finished cable are determined to meet this specification. The thickness of the insulating material is also determined based on this, and the amount of insulating material extruded by the extruder is determined based on this. However, even if you decide and set the extrusion amount on the extruder, there is no problem if the extrusion is done according to the set value, but if it is extruded less than the set value, the insulation material will become thinner, and in extreme cases, the dielectric strength will deteriorate. It is also possible that there will be a shortage. In addition, if the extrusion exceeds the set value, the insulation material will be coated thickly, which may be good for electrical insulation, but the diameter of the cable itself will become thicker, and when wound around a drum, the overall As the size increases, the weight of the entire drum also increases compared to the expected weight, which has a considerable impact on storage and transportation. Additionally, covering the insulating material thicker than the specifications in this way means using more insulating material than necessary, leading to earlier replenishment of insulating material, causing problems in terms of material management of the insulating material, and increasing costs. will also have an impact. Therefore, attempts have been made heretofore to control the amount of insulating material extruded by the extruder by determining the amount of insulating material extruded as a product in that line. Conventionally, the amount of material extruded as a product used is determined using a device as shown in FIG. That is, an extruder 300 that manufactures a coated wire 200 by extruding and coating a bare wire (in the case of a single wire and in the case of a stranded wire) 100 with a material is provided with a material supply device 1400. This material supply device! ! 400 includes a tank 402 that stores a material (eg, an insulating material) 401. At the outlet of this tank 402, the material 401 in the tank 402 is
A dispensing machine 403 for dispensing is provided. This payout machine 4
03 has a function of dispensing the material 401 in the tank 402 while finely adjusting the supply amount to match the set amount. A cylindrical body 404 is provided at the lower part of the dispensing machine 403, and the cylindrical body 404 is configured to temporarily store a set amount of material 401 dispensed from the extruder 403. has been done. Cylindrical body 404 of this dispensing machine 403
The material 4 temporarily stored in the cylinder 404 is located at the lower end of the cylinder 404.
A supply valve 405 is provided which is supplied dropwise by opening 07 in the direction indicated by the arrow in FIG. Further, this cylinder 404 is provided with a payout signal level sensor 406. This dispensing signal level sensor 4'06 detects that the material 407 temporarily stored in the cylindrical body 404 is
The dispensing machine 403 is operated based on the detection by the dispensing signal level sensor 406. Below the cylindrical body 404 of this dispensing machine 403, there is a cylindrical body 404
A quantitative scale (hopper scale) is provided for weighing the material 407 discharged from the container. This metering scale 408 has a measuring section 4081 and a storage section 4082 that stores the material 407 supplied from the unit 404. This storage section 4082 is formed into a cylindrical shape, and a supply valve 400 is provided at the lower end. Extruder 40
The material 407 dispensed and supplied from the cylindrical body 404 provided at the lower end of the container 3 is stored in the storage section 4082 and measured in the measuring section 4081. In this quantitative scale 408, the weight of the material 407 discharged from the cylinder 404 is measured. This measured value is compared with a set value, and if they do not match, the dispensing machine 403 is controlled so that they match. The supply valve 409 provided at the lower end of this storage portion 4082 and the supply valve 405 provided at the lower end of the cylindrical body 404 are drive devices! ! 411 to be opened and closed. A hopper 412 is provided below this quantitative scale 408. An extruder 300 is connected to the outlet of this hopper 412. This hopper 412 is provided with a supply valve signal level sensor 413. This supply valve signal level sensor 413 detects that the material 415 in the hopper 412 has decreased to a predetermined amount, and this detection signal is output to the computing unit 410. This computing unit 410 operates the drive device based on the output signal from the supply valve signal level sensor 413 to open the supply valve 409 as shown by the arrow in FIG. It is designed to be supplied internally. Note that the calculator 410 can calculate and display the amount of material used per hour based on the opening date and timing of the supply valve 400 and the measured value from the metering scale 408.

[Problems to be solved by the invention]

In such a conventional material supply device, a metering scale is inserted between the extruder and the tank. A device that supplies a fixed amount to a quantitative scale i! (dispensing machine) and a part (reservoir of metering scale and supply valve) that dispenses the weighed amount.Furthermore, as the dispensed amount is pushed out by the extruder, the supply valve signal level sensor At the same time as issuing the next supply request signal, the operation time was captured and the discharge weight per hour was calculated. For this reason, in conventional weight measurement, it is impossible to know the weight per drum because it is the weight per unit time (the time until the material is fed by the material feeding device), that is, the intermittent weight per hour. The problem is that it is difficult to In addition, in conventional weight measurement, the supply valve and metering scale are constantly operating, which tends to reduce accuracy.
The problem is that the detection accuracy of the sensor cannot be maintained at a high level and the accuracy of one weight measurement is low. Furthermore, in conventional weight measurement, a metering scale is inserted between the tank and the extruder, making the equipment complex, and since materials are processed in batches, it takes up space and is extremely difficult to install. have.

[Means for solving the problem 1] The present invention is capable of measuring the amount of material used per unit length of the material extruded from the extruder and coated on the cable. A method for measuring the weight of the covering material of an extrusion-coated conductor while the conductor is running, comprising: a first means for detecting a cross-sectional area of the conductor before being coated, such as the insulating material, while the conductor is running; a second means for detecting the cross-sectional area of the conductor with a sheathing diameter of while the conductor is running; and calculating the weight of the sheathing material per unit length of the sheathing material from the first means and the second means. This is configured by the third means. [Examples] Examples of the present invention will be described below. FIG. 1 shows an embodiment of the invention. In the figure, a pre-coated conductor 2 pulled out from a supply stand 1 in which a conductive wire not coated with an insulating material or the like is wound is supplied to an extruder 3 that extrudes and coats an insulating material. In front of this extruder 3, a pre-coated conductor outer diameter measuring head 4 according to the present invention is provided. In addition, from the extruder 3,
Covering material (insulating material, etc.) is extruded and coated, W! 5 is output. At the rear of the extruder 3, a coated conductor outer diameter measuring head 6 for detecting the outer diameter of the coated wire 5 is provided. The coated wire 5 is cooled in a cooling water tank 10, taken up by a take-up machine 9, and wound onto a take-up drum 10. A measuring device 8 is provided behind the cooling water tank 10 to measure the running length of the covered wire. The conductor outer diameter measured by the uncoated conductor outer diameter measurement head 4 is input to the conductor outer diameter display 11, and the outer diameter is displayed. Further, the outer diameter of the conductor measured by the coated conductor outer diameter measuring head 6 is input to the conductor outer diameter display 12, and the outer diameter is displayed. This uncoated conductor outer diameter measuring head 4 is shown in FIG.
It has a measurement principle as shown in FIG. In other words, the uncoated conductor outer diameter measuring head 4 has two laser beam oscillators 41 and 42. This laser light oscillator 41.
A plurality of laser light sensing elements (
- 4 laser light detectors (in rows or strips);
3 and 44 are provided. This laser light sensing element outputs a constant voltage when irradiated with laser light. In this way, the uncoated conductor 2 is configured to travel within a curtain of laser light irradiated with laser light 45 in a cross shape, as shown in FIGS. 2 and 3. The laser light sensors 43 and 44 sense the laser light 45 emitted from the laser light oscillators 41 and 42, and output a voltage that is added by the amount of the laser light sensing element that received the laser light 45. Therefore, when the uncoated conductor 2 passes through the uncoated conductor outer diameter measurement head 4, the laser beam 4 is emitted as shown in FIG.
5 is the distance Q, Q at the laser light sensor 43.44
There is a part where the length of z is not detected, and the laser light sensor 4
From 3.44, a voltage corresponding to this distance Q1Qx excluding the unsensed portion is output. This distance Q21 is the outer diameter of the passing conductor. This detected value is determined by the laser light sensor 4.
As shown in Figure 4, the output voltage varies linearly depending on the amount of laser light 45 irradiated on 3 and 44 (if there are few laser light sensing elements, the change will be stepwise). By detecting the output voltage value output from 4, the outer diameter can be immediately detected. Measuring the outer diameter from two directions, from above and from the side as shown in Figures 2 and 3, is not a problem if the conductor passing through has a uniform circular cross section, but the cross section is uniform. This is to obtain more accuracy by calculating the average value of Q8 and Q□ when the shape is not a perfect circle. Further, the coated conductor outer diameter measuring head 6 has the same structure as the uncoated conductor outer diameter measuring head 4, as shown in FIG. That is, the coated conductor outer diameter measuring head 6 has two laser beam oscillators 61 and 62. A laser light sensor 63, 64 is provided at a position opposite to the laser light oscillator 61, 62, which is constructed by laying out a plurality of laser light sensing elements in a row or in a band shape. This laser light sensing element, like the uncoated conductor outer diameter measurement head 4, outputs a constant voltage when laser light is irradiated. When the coated wire 5 passes through the irradiation of the laser beam 65, as shown in FIG. , laser light sensor 63.64
From this distance Q1. The voltage equal to Ω, excluding the unsensed portion, is output. This distance 031Q4 is the outer diameter of the passing conductor. In addition, the measuring device 8 holds the covered wire 5 between two rollers 81 and 82, and as the covered wire 5 runs, the rollers 81 and 82 rotate, and this rotation measures the passing length of the covered wire 5. It is something to be measured. This roller 8
2, the number of pulses counted is input to the measuring meter counter 13, and this pulse counting number is input to the measuring meter counter 13.
In this step, the number of revolutions is converted into the length of passage of the coating m5 based on the characteristics shown in FIG. The length of the covered wire 5 is displayed on the display section 131. Also, depending on the size of the winding drum 10, the measuring counter 13 may have a measuring value of, for example, 100 mm.
A full amount setting switch 132 is provided for setting the length of one winding drum, ie, 50 m, and the required length can be preset using this full amount setting switch 132. When the amount of covered wire 5 set by this full amount setting switch 132 passes, an alarm is issued, and when the amount is full, the control device is actuated to cut the covered wire 5 and replace the winding drum 10 with a new one. It has the function of outputting a control signal. This measuring counter 13, the conductor outer diameter indicator 11.12
The output from is input to the calculation display device 15. A reset switch 14 is connected to the calculation display bag W115 and the measuring counter 13. This calculation display device, 1
5 has a weight display section 16 that displays the weight of the coating material, a cross-sectional area setting section 17 for the conductor 2 before coating, a resin chromaticity setting section 18, a date/number setting section 19, and a printer 20. ing. The weight display section 16 calculates the amount of resin per cross-sectional area from the outer diameter of the conductor before and after coating output from the conductor outer diameter display 11. From this, the amount of resin used per unit length (for example, 1 m) is calculated, and then multiplied by the density of this resin to display the weight of the covering material per unit length. In addition, as shown in FIG. 3, in the case of a stranded wire in which three strands are twisted, the cross-sectional area setting unit 17 of the pre-coated conductor 2 measures the outer diameter with the pre-coated conductor outer diameter measurement head 4. However, if this measurement result is taken as the outer diameter of the uncoated conductor 2 and the cross-sectional area of the uncoated conductor 2 is calculated from this outer diameter, an incorrect cross-sectional area will be calculated. Therefore, when the outer diameter is clear in advance and a set value is used without using a measured value, the cross-sectional area setting unit 17 is used. Further, the resin density setting section 18 can change the density of the resin during extrusion in various ways depending on the extrusion conditions, and the density is not related to the cross-sectional area.
The resin area per cross-sectional area is known from the value output from 1.12, but unless the density of this resin is clear, the weight is unknown, and the exact amount of resin used is not clear, so in order to know this weight, The density is set to . Furthermore, the date/number setting unit 19 is for setting the manufacturing date and serial number of the coated wire wound on the winding drum 10. Further, the printer 2o is used to print out the contents set in the date number setting section 19, the resin density setting value, the weight value, etc. FIG. 7 shows a block diagram of the equipment shown in FIG. In the figure, a square calculator 22 is connected to a coating machine conductor outer diameter detector 21. This square calculator has a coefficient circuit 2.
An addition/subtraction circuit 24 is connected via 3. A switching circuit 25 is connected to this addition/subtraction circuit 24 . This switching circuit 25 sets the value outputted via a coefficient unit 27 when the measured value output from the uncoated conductor outer diameter detector 26 is multiplied by a certain coefficient, and the cross-sectional area S of the uncoated conductor. The value outputted from the setter 28 is switched and outputted to the addition/subtraction circuit 24. This addition/subtraction circuit 24 has
Resin density r preset by resin density setting device 29
A coefficient circuit 30 for multiplying and matching is connected. The value calculated by the coefficient circuit 30 is converted into a digital value by the A/D converter 31 and input to the arithmetic unit 32 . This arithmetic unit 32 is constituted by a microcomputer, and has an interface I10 for connection with the outside, a ROM, a RAM, and a CPU. A measuring device 33 for measuring the length of the cable is connected to this Ilo. Further, a display device 34 is connected to the arithmetic unit 32 . Next, the operation of the block diagram shown in FIG. 7 will be explained. First, when the conductor diameter d is detected by the uncoated conductor outer diameter detector 26, the coefficient k is multiplied by the coefficient multiplier 27 to obtain the cross-sectional area S0 of the combined conductor. The coefficients in this coefficient unit 27 differ depending on whether the wire is a single wire or a twisted wire, so they are set each time. Furthermore, if the cross-sectional area of the uncoated conductor is clear in advance, it is set using the setting device 28. In this case, the switching circuit 25
outputs the output from the setter 28 to the addition/subtraction circuit 24. On the other hand, when the coater conductor outer diameter detector 21 measures the outer diameter of the coated conductor, the double calculator 22 doubles the outer diameter to obtain a value D2. This double value D2 is the coefficient multiplier 't
In 1123, the cross-sectional area 51 (=πD'/4) of the conductor of the coating machine is multiplied by a coefficient π/4, and the cross-sectional area S0 of the conductor before coating outputted from the switching circuit 25 is subtracted in the addition/subtraction circuit 24. S, -S, =S. Thereby, the resin cross-sectional area S2 is determined, and in the coefficient circuit 3o, the resin weight WW=r −82 is determined by multiplying by the resin density r set in advance in the resin density setting device 28. This resin weight W is converted into a digital value by the A/D converter 31 and input to the calculator 32 . In this calculator 32, the value of the length of the cable inputted from the measuring device 33 is multiplied by the weight of the resin, and the total weight of the covering material of the length is determined.

【Effect of the invention】

As explained above, according to the present invention, the usage fee and weight per unit length of the material coated on the cable extruded from the extruder can be measured while the coated wire is running.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the uncoated conductor outer diameter measuring head shown in FIG. 1. Fig. 3 is a front view of Fig. 2, Fig. 4 is an output voltage characteristic diagram of the laser light sensor shown in Fig. 2, Fig. 5 is a front view of the outer diameter measuring head of the coated machine body shown in Fig. 1, and Fig. 6 is a front view of Fig. 2. Figure 1 is a diagram showing the relationship between the count number of the illustrated needle measure counter and the cable length, Figure 7 is an operational block diagram of Figure 1, and Figure 8 is a schematic diagram showing a conventional coating material measuring device. be.

Claims (4)

[Claims] (1) In a device that measures the weight of a conductor coated with an insulating material etc. by extrusion using an extruder while the conductor is running, the cross-sectional side of the conductor before being coated with the insulating material etc. is detected while the conductor is running. a second means for detecting the cross-sectional area of the conductor after being coated with the insulating material while the conductor is running; and a unit length of the covering material from the first means and the second means. 1. A weight measuring device for a conductor covering material, comprising: third means for calculating the weight of the covering material at a time. (2) An apparatus for measuring the weight of a conductor covering material according to claim 1, characterized in that a fourth means for counting the running distance of the running conductor wire is provided. (3) In the item set forth in claim 1 or 2, the cross-sectional area of the conductor before coating is replaced with a predetermined value in place of the value of the cross-sectional area of the conductor before coating in the first means. A weight measuring device for a conductor coating material, characterized in that a fifth means is provided for selecting and inputting a value of . (4) The conductor coating according to any one of claims 1, 2, and 3, characterized in that a sixth means for setting the density of the coating material is provided. Equipment for measuring the weight of wood.