KR100816318B1 - Equipment for inspecting groove of spiral spacer for bearing optical fiber - Google Patents

Abstract

The groove inspection apparatus of the optical fiber bearing spiral spacer having a plurality of spiral grooves in which rotational directions are reversed at predetermined angular intervals and continuously running on the outer periphery includes a rotating body that rotates with the running of the spacer. Groove abnormality detection unit for detecting groove abnormality of the spiral groove in sliding contact from the whole rotational resistance, and groove pitch for detecting the groove pitch of the spiral groove from the rotation angles of the first and second rotating bodies and the traveling speed of the optical fiber bearing spacer. It has a measuring unit. The groove abnormality detection unit is provided with a guide rail extending in a linear shape, a support member slidably disposed on the guide rail, a first rotating body rotatably supported by the support member, and a force of a predetermined value or more applied to the support member. It is provided with a load detector coupled through the magnetic suction means spaced apart.

Description

Home inspection device for spiral spacer for optical fiber loading {EQUIPMENT FOR INSPECTING GROOVE OF SPIRAL SPACER FOR BEARING OPTICAL FIBER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a groove inspection apparatus for an optical fiber bearing (bearing) spiral spacer. In particular, the present invention relates to an optical fiber bearing spacer having a plurality of spiral grooves which are rotated at predetermined angles and continuously run. The present invention relates to a groove inspection apparatus for measuring and inspecting an abnormality in the inner surface of a spiral groove, a spiral pitch, and an inversion angle.

As is widely known, optical fibers have a low transmission loss and a very large amount of transmission. Therefore, practical use has been promoted in a wide range of communication fields. When cabled and laid a plurality of optical fibers, spiral grooves for supporting optical fibers are formed on the outer periphery. The spacer is used as a cable core wire, and an optical fiber is inserted into this spiral groove to avoid stresses such as tension, compression, bending, and the like.

By the way, the spiral groove of such a spacer is provided so that the outer periphery may be circulated from one to the other, and the thing formed so that the outer periphery may be inverted in the predetermined angle, for example, 360 degree space | interval is provided.

In the former circumferential spiral groove, when the optical fiber is inserted into the groove, a bobbin wound around the optical fiber must be rotated, so that a large large rotational equipment is required, and the equipment cost becomes expensive. In addition, there is a problem that it is difficult to branch the optical fiber halfway after cabling.

On the other hand, in the latter reverse spiral groove, it is easy to branch out from the middle of the cable, and there is no need to rotate the bobbin wound with the optical fiber, and the equipment cost is low because there is no need for the rotating equipment. In particular, in this type of spiral groove The direction of the grooves is reversed at predetermined angular intervals, and abnormality easily occurs in the groove shape at this inverted portion.

If abnormalities such as minute projections or convexities, fluctuations in groove pitch and inversion angle occur on the inner circumferential surface of the spiral groove, problems such as failure to acquire the optical fiber stably in the groove when cabled, may occur, or cables may be formed. Even in use, this abnormal point causes unnecessary side pressure on the optical fiber to increase the transmission loss, which adversely affects the transmission characteristics of the optical fiber.

In view of this, in particular, the spacer in which the latter inverted spiral groove is formed is required to have no groove abnormality over the entire length, and to have strict dimensional accuracy in groove pitch and inversion angle.

Therefore, conventionally, a rotating body that rotates in accordance with the running of the optical fiber bearing spacer is mounted in the middle of the manufacturing process, and the abnormality of the inner surface of the spiral groove is detected based on the difference in the rotational resistance of the rotating body.

However, in such a groove abnormality inspection device of the conventional spiral groove, when there are abnormal portions such as minute projections or convex portions on the inner circumferential surface of the spiral groove, the abnormality can be detected. Whether the groove pitch and the inversion angle of the grooves are formed correctly has a problem that measurement cannot be detected.

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and its object is to precisely detect abnormalities in the shape of the spiral grooves and fluctuations in groove pitches and inversion angles, particularly at predetermined angular intervals. An object of the present invention is to provide a groove abnormality inspection device for an optical fiber carrying spiral spacer that can be detected at the same time.

In order to achieve the above object, the present invention is a spiral groove inspection apparatus of an optical fiber carrying spacer formed in the outer periphery of a plurality of spiral grooves in which the rotational direction is reversed at predetermined angle intervals and continuously running, the optical fiber carrying A groove abnormality detecting unit having a rotating body rotating with the running of the spacer, the groove abnormality detecting unit detecting a groove abnormality of the spiral groove in sliding contact with the rotational resistance of the rotating body, the rotation angle of the rotating body and the optical fiber supporting spacer The groove pitch and groove reversal angle measuring unit for detecting the groove pitch and groove reversal angle of the spiral groove from the traveling speed was provided.

In the present invention, the groove abnormality detection unit includes a guide rail extending in a linear shape, a support member slidably disposed on the guide rail, the rotating body rotatably supported by the support member, and the support member. It is possible to install a combined load detector via magnetic attraction means that are spaced apart when more than a force is applied.

The rotating body may be provided with a through opening through which the optical fiber bearing spacer is inserted, and a pin gauge having a tip portion fitted to the spiral groove around the opening may be disposed to protrude.

The load detector may be configured as a sealed load cell.

In addition, the groove pitch and groove inversion angle measuring unit of the present invention, the speed pulse generator for generating a signal corresponding to the amount of travel of the spacer, the rotating body fitted to the spiral groove, the rotation angle signal corresponding to the rotation angle And a pulse generator for transmitting a rotation direction determination signal, which has been delayed by a predetermined angle from the rotation angle signal, and a pulse generator for transmitting one rotation pulse signal accompanying one rotation of the spiral groove with the rotation of the rotating body, the rotation angle and Receiving a rotation direction discrimination signal, the reversal position of the spiral groove is determined, and the pulse and the rotation angle signal of the speed pulse generator between the adjacent reversal positions are counted, and the groove pitch and the groove reversal angle of the spiral groove are counted. It consists of arithmetic unit for calculating

The pulse generator may include a pair of first, second pulse generators, and third generators arranged at predetermined intervals along a traveling direction of the optical fiber bearing spacer, and receive the rotation direction determination signal of each pulse generator. And a rotation direction determination unit for determining the rotation direction of the optical fiber bearing spacer, and counting the rotation angle signal of the third pulse generator when the rotation direction determination signals of the first and second pulse generators coincide with each other. As the starting condition, the rotation angle of the third pulse generator can be detected, and the inflection point detected after a predetermined time elapses after the start of counting of the rotation angle signal can be determined by the inversion position and the computing device.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external appearance of the principal part of the spiral spacer which is a test object of the groove | channel inspection apparatus of the optical fiber carrying spiral spacer which concerns on this invention.

FIG. 2 is a cross-sectional view of the spiral spacer shown in FIG. 1. FIG.

3 is an overall layout view of a groove inspection apparatus for an optical fiber carrying spiral spacer according to the present invention.

4 is an explanatory diagram of main parts of FIG. 3.

5 is an enlarged view illustrating main parts of FIG. 3.

FIG. 6 is a block diagram of the electrical system of the groove abnormality detecting unit shown in FIG. 5.

FIG. 7 is a flowchart of the processing procedure of the calculation display shown in FIG.

FIG. 8 is a detailed view of the groove pitch and groove inversion angle measurement unit shown in FIG. 3.

FIG. 9 is a configuration diagram of the computing device of the groove pitch and groove inversion angle measurement unit shown in FIG. 8.

FIG. 10 is a flowchart of a groove inversion angle calculation processing procedure executed in the computing device shown in FIG. 8.

FIG. 11 is an explanatory diagram when a peak value and a bottom value are obtained in the flowchart of FIG. 10.

Best Mode for Carrying Out the Invention

EMBODIMENT OF THE INVENTION Below, embodiment of this invention is described in detail based on an Example. In the groove inspection apparatus 1 of the optical fiber carrying spiral spacer which concerns on this invention, the spiral spacer A shown to FIG. 1, FIG. 2 becomes the inspection object.

The spiral spacer A shown in these figures is provided with the tension line A1 arrange | positioned at the center, and the main-body part A2 made from the synthetic resin coat | covered in the outer periphery.

The main body portion A2 has a concave plurality of spiral grooves A3 having a concave cross-section that is inverted at a predetermined rotational angle 2α along the longitudinal axis direction and continuously runs, and each spiral groove A3 is It is formed with the predetermined groove inversion pitch p, and the internal surface abnormality of this spiral groove A3, and the groove inversion pitch p are measured and inspected.

In the case of this embodiment, the groove | channel test | inspection apparatus 1 is a pair of take-out machine 14 provided in the middle of the manufacturing process of the spiral spacer A which runs in the direction of the arrow of FIG. 3 as showing the whole arrangement state in FIG. , 14 '), and the groove | dye abnormality detection part 2 provided in the case body 24, and the groove pitch and the groove | channel inversion angle measuring part 10 are comprised.

On the case body 24, a pair of guide roller apparatus 26 of the same structure is provided so that the groove | dye abnormality detection part 2 and the groove pitch and the groove | channel inversion angle measuring part 10 may be pinched | interposed. Each guide roller apparatus 26 is comprised from four well sperm rollers 26a-26d which inserted the spiral spacer A from four directions, as the detail is shown in FIG.

The guide roller device 26 configured as described above has a groove abnormality detecting unit 2, a groove pitch, and a groove reversing angle measuring unit when the vertical and horizontal vibrations when the spiral spacer A is taken out by the take-out machine 14 are used. It is considered not to appear as a measurement error of 10).                 

The groove abnormality detection part 2 is provided in the front end side of the groove pitch and the groove | channel inversion angle measuring part 10, and is provided with the rotating body 3 which rotates with running of the optical fiber bearing spiral spacer A, The basic configuration is to detect groove abnormality of the spiral groove A3 in sliding contact from the rotational resistance of the rotor 3.

The groove abnormality detection part 2 of this embodiment is fixed to the case body 24, as shown in FIG. 5, and is provided on the guide rail 4 extended linearly. On this guide rail 4, the support member 5 of the rotating body 3 is provided to slide freely along the longitudinal axis direction of the guide rail 4.

The support member 5 is fitted to the guide rail 4 and has a slide table 5a provided to slide freely, and a vertical support plate 5b supported on the slide table 5a and extending vertically upward. have.

In the upper part of the vertical support plate 5b, the disk-shaped rotating body 3 is rotatably supported about the horizontal axis via the bearing 6. The rotating body 3 is a circular through which a spiral spacer A which runs between a pair of take-out machines 14 and 14 'provided in the middle of a manufacturing process is inserted in the center of a disc shaped main body 3a. The opening 3b is formed.

On the inner circumferential side of the through opening 3b of the rotating body 3, the number of pin gauges 3c corresponding to the number of the spiral grooves A3 is fixed with screws, and the front end side of each pin gauge 3c is a through opening ( It protrudes inward of 3b).

Each pin gauge 3c is formed in the shape whose protruding shape corresponds to the shape of the spiral groove A3. The shape relationship between these spiral grooves A3 and the pin gauge 3c is set such that the wall forming the spiral grooves A3 of the spiral spacer A and the outer surface of the pin gauge 3c are close to the close contact state. It is.

On the other hand, in the side of the guide rail 4, the load cell (load detector) 7 of the sealed state which is located in the vicinity of the support member 5 and converts the magnitude of a load into an electrical signal and sends it is arrange | positioned.

The load cell 7 is a strain gage type in which a strain gage and a strained organic column connected thereto are enclosed in a case, as is well known. In this embodiment, for example, the strain gage type is employed.

The load cell 7 and the slide table 5a are connected by the connecting member 8. This connecting member 8 is comprised from the 1st connection part 8a fixed to the slide stand 5a, and the 2nd connection part 8b fixed to the load cell 7 side.

In the case of the present embodiment, the permanent magnet is embedded in the second connecting portion 8b, and the first connecting portion 8a is made of a metal material which can be adsorbed by the magnet, and in the normal state, the first connecting portion 8a is formed of the first connecting portion 8a. It is adsorbed by 2 connection part 8b.

In the groove abnormality detection part 2 comprised as mentioned above, when the spiral spacer A runs, since the rotating body 3 is fitted to the spiral groove A3, the rotating body 3 will be made of the spiral spacer A. As shown in FIG. As it travels, it rotates inverting every predetermined angular interval in the same direction as the rotation direction of the spiral groove A3.

At this time, the rotating body 3 becomes a load with respect to the running of the spiral spacer A, and the slide stand 5a which supports the rotating body 3 with the running of the spacer A is a guide rail 4 Attempt to slide the image backwards.

The action force in the horizontal direction at this time is transmitted to the load cell 7 via the first and second connecting portions 8a and 8b, and as a result, the load cell 7 is in the same direction as the running direction of the spiral spacer A. The load of is transmitted.

The connecting member 8 which transmits the action force which the slide table 5a intends to slide to the load cell 7 here is comprised by the 1st and 2nd connection parts 8a and 8b attracted by the permanent magnet.

For this reason, if the adsorption force of the permanent magnet causes the engagement of the first and second connecting portions 8a and 8b to be released when a force of a predetermined value or more acts on the rotor 3, when a groove abnormality occurs, The damage of the detection apparatus 2 can be prevented.

On the other hand, the load cell 7 is electrically connected to the arithmetic indicator 9b via the amplifier 9a, as shown in FIG. The arithmetic indicator 9b is constituted of a so-called personal computer, and includes an interface, a memory, an input keyboard, and the like. The arithmetic indicator 9b is connected to a display 9c and an alarm 9d.

In the present embodiment, the calculation indicator 9b detects an abnormality in the groove of the spiral groove A3 according to the procedure shown in Fig. 7 by using the load detection value R transmitted from the load cell 7 as an input signal. .

In the procedure shown in Fig. 7, the initial setting is executed in step 1 when the procedure starts first. In this initial setting, the risk value Rmax which judges that the spiral groove A3 is more than a groove | channel is set with respect to the load detection value R which the load cell 7 detects.

This risk value Rmax is derived from an average of past experience values and actual measured values, and the like. When setting of the danger value Rmax is complete | finished, in step 2, the load detection value R of the load cell 7 is accepted, and the value is displayed on the display 9c as a measured value.

Next, in step 3, it is determined whether or not the load detection value R is greater than the danger value Rmax, and when the load detection value R is smaller than the danger value Rmax, in step 4, the measurement of the groove or more is performed. It is judged whether or not it ends, and if a measurement is not complete | finished, it returns to step 2 and continues measuring more than a groove.

On the other hand, when it is determined in step 3 that the load detection value R is larger than the dangerous value Rmax, an abnormality has occurred in the spiral groove A3. Therefore, the alarm 9d is operated in step 5. At the same time, the meaning is warned, and the length of the line of the spiral spacer A at the time of abnormality is displayed, and the process returns to Step 4.

In the groove abnormality detector 2 comprised as mentioned above, when the helical spacer A is run in the state which passed the penetration opening 3b of the rotating body 3, the spiral groove A3 of the helical spacer A will be carried out. ) And traveling resistance based on sliding contact with the pin gauge 3c of the rotating body 3 fitted to the spiral groove A3 are converted to the rotational force of the rotating body 3, and the slide table 5a. Together with the horizontal force it tries to move it to the rear side on the guide rail 4.

This horizontal force is transmitted to the load cell 7 via the connecting member 8 which is magnetically coupled with the magnet. The load cell 7 detects a load corresponding to this horizontal force, converts it to an electrical signal as a load detection value R, and outputs it to the calculation display 9b.

The operation indicator 9b monitors the state of the spiral groove A of the spiral spacer A based on the output signal of the load cell 7, and based on the magnitude of the load detection value R, the spiral groove ( The abnormality of the inner surface of A3) is detected.

In this case, when the abnormality of the groove of the spiral groove A3 is extremely large, the running resistance of the rotor 3 becomes very large, but at this time, the driving drag exceeds the adsorption force of the permanent magnet, and as a result, the connecting member There is no coupling between the first and second connecting portions 8a, 8b of (8), and the rear movement of the slide table 5a is permitted, so that parts such as the supporting member 5, the rotating body 3, and the load cell ( 7) It is not broken.

In addition, when the slide stand 5a contacts the proximity switch 5c, the back movement of the slide stand 5a at this time will stop the drive of the take-out machine 14, and ensures safety.

On the other hand, the groove pitch and groove inversion angle measuring unit 10 includes a speed pulse generator 16, a pair of first and second rotating bodies 17 and 18, and a first rotating body. The first and third pulse generators 19 and 21 disposed on the upper portion of the 17, and the second pulse generator and the computing device 22 on the upper portion of the second rotating body are outlined.

The speed pulse generator 16 generates the pulse signal corresponding to the amount of movement of the spacer A, and is provided in the front take-up machine 14.

The 1st, 2nd rotating bodies 17 and 18 are substantially the same structure, and are formed at predetermined intervals along the advancing direction of the spiral spacer A, and each rotating body 17 and 18 is a spiral It fits in the spiral groove A3 of the spacer A, and rotates with the progress of the spacer A, and is provided on the case body 24 provided between the take-out machines 14 and 14 '.

The detail of the 1st rotating body 17 is shown in FIG. In addition, since the structure of these 1st and 2nd rotating bodies 17 and 18 is completely the same except having loaded the 3rd pulse generator on the upper part of the 1st rotating body 17, in the following description, it installed in the front side. It demonstrates on behalf of one 1st rotating body 17. As shown in FIG.

The 1st rotating body 17 shown in the figure is equipped with the hollow cylinder-shaped main body 17b with a collar by which the gear 17a was fitted and fixed to the outer peripheral part, and the some pin 17c.

The pin 17c is inserted into the helical groove A3 of the spacer A so that its tip side is fitted and is recessed in the collar portion of the main body 17b, and is fixed by a screw in the radial groove oriented in the center direction. It is.

The first rotating body 17 is rotatably supported by a holder 30 in which an insertion hole of the spacer A is formed. The holder 30 is supported by the support leg 32, and the support leg 32 is fixedly installed on the case body 24.

The 1st pulse generator 19 and the 3rd pulse generator 21 are supported by the flange 34 fixed to the upper end side of the holder 30, and are attached to the rotating shaft 190 of the 1st pulse generator 19. As shown in FIG. A driven gear 191 fitted with the gear 17a and a driven gear 211 meshing with the driven gear 191 are fixed to the rotary shaft 210 of the third pulse generator 21.

When the spacer A advances, the 1st pulse generator 19 and the 2nd pulse generator 20 rotate with the rotation bodies 17 and 18 by this, and rotate by rotation of the rotation bodies 17 and 18. FIG. And the angle signals θ1 and θ2 are sent out, respectively. When these angle signals coincide, the SZ pitch signal (match signal; s) is output from the comparator 30.

The determination of the condition where the angle signals θ1 and θ2 coincide is performed with an absolute value without considering the direction, and the pair of first and second rotary bodies 17 and 18 are provided at predetermined intervals, As shown in Fig. 11 to be described later, the peaks and the bottom values are centered, and on both sides of the points (i, iii) and 0 at which the first and second rotary bodies 17 and 18 are equally spaced, SZ pitch signal s is output from the comparator 30 in the part (ii) where the 1st and 2nd rotating bodies 17 and 18 are equally spaced on both sides, respectively.

9 shows a configuration diagram of the computing device 22. The arithmetic unit 22 shown in the same figure has a CPU 22a, a high speed counter unit 22b, an input unit 2c, an output unit 22d, and a D / A conversion unit 22e.

In the input unit 22c, the output signals of the first and second pulse generators 19 and 20 are input through the comparator 30, and the groove pitch display section 34 and the groove inversion provided in the case body 24 are provided. The angle display part 36 is connected.

Each of these display units 34 and 36 is capable of displaying the present measured value, displaying the set value and displaying the allowable value. The comparator 30 receives the angle signals θ1 and θ2 transmitted from the first and second pulse signal generators 19 and 20 and generates a coincidence signal s for each inverted pitch of the optical fiber bearing spacer A. Is connected to the input unit 22c.

The third pulse generator 21 is connected to the input unit 22c via the direction discrimination unit 22f for transmitting the rotation direction discrimination signal f. In addition, the third pulse generator 21 is connected to the high speed counter unit 22b and is connected to the input unit 22c via this high speed counter unit 22b.

In addition, the speed pulse generator 16 is connected to the input unit 22c. The SZ waveform recorder 42 is connected to the output unit 22d via the pitch printing printer 40, the inversion angle printing printer 41, the alarm 46, and the D / A conversion unit 22e.

The CPU 22a receives the coincidence signal s from the rotation angle signals θ1 and θ2, determines the inversion position of the spiral groove 13a, and calculates the groove inversion pitch p of the spiral groove A3. At the same time, the pulse of the third pulse generator 21 between adjacent inversion positions is counted by the high speed counter unit 22b to calculate the inversion angle 2α.

Next, it demonstrates based on FIG. 10 which shows an example of the calculation means performed by CPU22a.

When the procedure shown in Fig. 10 is started, at step S1, the set value and set value of the inversion angle 2α and the groove pitch p of the spiral groove A3 are input, and these allowable values are also input together.

In the following step S2, the signal f of the direction determination unit 22f is received, and it waits until the output signal d becomes CW. When it determines with this signal f becoming CW, it transfers to step S3.

In step S3, it waits until the coincidence signal s from the comparator 30 is sent, and when the coincidence signal s is obtained, in step S4, the rotation angle signal b of the 3rd pulse generator 21 is sent. It is determined whether or not the peak value is detected by receiving the counter value of the high speed counter unit 22b for each predetermined time, and simultaneously comparing the front and back of the counter value of the high speed counter unit 22b at every predetermined time interval. The value is obtained.

The determination procedure of the peak value, by detecting the inflection point (X ₀₎ of a rotation angle signal (b) of the third pulse generator 21 as shown in FIG. 11, when the inflection point X ₀ is detected, then at that time The counter value of the high speed counter unit 22b is stored as the peak value P ₀ .

In addition, the rotation angle signal b shown in FIG. 11 measures the pulse signal transmitted from the 3rd pulse generator 21 with the high speed counter, and represents it with the waveform which carried out the D / A conversion.

In subsequent step S5, it waits until direction direction unit 22f becomes CCW, and when it determines with CCW, it transfers to step S6. In the example shown in Fig. 11, the coincidence signal s is centered at zero as described above, and the point (ii) at which the first and second rotating bodies 17 and 18 are equally spaced on both sides. In this embodiment, the coincidence signal s at this time is the inflection point, that is, the direction of rotation from CW to CCW, from CCW to CW after the third pulse generator 21 transmits this signal. If it does not change, it is comprised so that this may be ignored.

In the case of this embodiment, as shown in Fig. 11, when chattering C occurs in the direction discrimination signal f, if the signal sending time is a predetermined time, for example, 0.7 seconds or less, this is ignored. It is not intended to be employed as the direction discrimination signal f.

On the other hand, in step S6, it waits until the next matching signal s is sent from the comparator 30, and when the matching signal s is obtained, the rotation angle signal b of the 3rd pulse generator 21 is carried out in step S7. ), The counter value of the high speed counter unit 22b for each predetermined time is received, and the bottom value B ₀ is determined whether the front and back counter values of the high speed counter unit 22b are sequentially compared. , The value is obtained.

In the determination procedure of the bottom value B ₀ , the inflection point X ₁ of the rotation angle signal b of the third pulse generator 21 is detected, and when this inflection point X ₁ is detected, The counter value of the high speed counter unit 22b is stored as the bottom value B ₀ .

In the next step S8, the calculation of the inversion angle 2α is executed. This operation is a counter value difference = peak value P ₀ -bottom value B ₀ . In addition, in this step S8, the calculation of the groove pitch p is also performed.

The groove pitch p is obtained by counting the number of pulses of the speed pulse generator 16 with the calculation circuit (PLC, not shown) in the CPU while the peak value P ₀ and the bottom value B ₀ are obtained. .

When the inversion angle 2α and the groove pitch p are found, their values are displayed together with the set values, the set value-measured values are calculated, and it is judged in step S10 whether or not this falls within the allowable values, and allowed. If the value does not fall within the value, an alarm is generated in step S11.

If it is determined in step S10 that the value is within the allowable value, the size of the measured values so far is compared in step S12, and if the current measured value is the maximum value or the minimum value, it is updated to the maximum value or the minimum value in step S13. Remember this.

In step S14, inversion angle data is added, and the value is sent to the printer 41 in step S15. In step S16, it is determined whether or not the measurement ends, and when the measurement is not finished, the process returns to step S2 again.

If it is determined in step S16 that the measurement has been completed, in step S17, the maximum value MAX, minimum value MIN, and average value AVE of the inversion angle 2α and the groove pitch p obtained by the previous measurements are respectively obtained. It calculates and outputs each of these values to the printer 40 and 41 (step S17), and complete | finishes a measurement.

According to the groove pitch and groove inversion angle measuring unit 10 configured as described above, the inversion groove pitch p and the inversion angle of the spacer A having the spiral groove A3 formed on the outer periphery with a predetermined pitch and rotation angle. All of the measurements of (2α) can be made in the manufacturing process, and this can be carried out over the entire length of the spacer (A).

In this case, the inversion pitch p and the inversion angle 2α of the spiral spacer A receive the rotation angle and the rotation direction discrimination signal, determine the inversion position of the spiral groove A3, and between the inversion positions adjacent to each other. Since the pulse and the rotation angle signal of the speed pulse generator 16 are counted and obtained, even if a straight portion exists between the inverted positions at which the direction of the spiral groove A3 switches, the inverted position can be measured accurately.

Therefore, according to the groove | channel inspection apparatus 1 of the optical fiber supporting spiral spacer A comprised as mentioned above, the groove | channel abnormality detection part which detects the groove | dye abnormality of the spiral groove A3 sliding-contacting from the rotational resistance of the rotating body 3 ( 2) and the groove inversion pitch p and groove inversion angle of the spiral groove A3 are detected from the rotation angles of the first and second rotating bodies 17 and 18a and the traveling speed of the optical fiber bearing spacer A. Since the groove pitch and the groove inversion angle measuring unit 10 are provided, the abnormality of the groove shape and the abnormality of the inversion pitch and the inversion angle can be detected simultaneously in the middle of the manufacturing process.

Moreover, in the said Example, although the case where the rotating bodies 3, 17, and 18 were provided in the groove | dye abnormality detection part 2 and the groove | channel pitch and groove | channel inversion angle measuring part 10, respectively was illustrated, the implementation of this invention is It is not limited to a structure, You may share the rotating body 3 with the 1st rotating body 17, for example.

Moreover, in the said Example, although the case where both the inversion pitch p and the inversion angle 2 (alpha) were measured by the groove pitch and the groove inversion angle measuring part 10 was illustrated, in this invention, the measurement of the inversion pitch p is carried out. You can also run only.                 

In addition, the arithmetic indicator 9c of the groove abnormality detection part 2 shown in the said Example can also be used together with the arithmetic processing apparatus 22 of the groove pitch and the groove | channel inversion angle measuring part 10. As shown in FIG. In this case, the control procedure shown in FIG. 7 may be inserted before step S13 of the control procedure shown in FIG. 10, for example, and these may be made into a series of procedures.

Since the inspection apparatus of the optical fiber carrying spiral spacer of this invention is provided in the middle of the manufacturing process of a spiral spacer, the abnormality of a groove shape, the groove pitch, and an inversion angle can be measured over the full length of the spiral spacer to manufacture, and therefore, an optical fiber It is effective to maintain the transmission performance of the optical cable in which the high density is aggregated.

Claims (6)

In a spiral groove inspection apparatus of a spacer for carrying an optical fiber, in which a plurality of spiral grooves in which rotation directions are reversed at predetermined angle intervals and continuously run are formed on an outer circumference thereof, It is provided with a rotating body that rotates with the running of the optical fiber carrying spacer, A groove abnormality detection unit for detecting groove abnormality of the spiral groove in sliding contact from the rotational resistance of the rotating body; A groove pitch and groove inversion angle measuring unit for detecting groove pitch and groove inversion angle of the spiral groove from the rotation angle of the rotating body and the traveling speed of the optical fiber bearing spacer, The groove abnormality detection unit, A guide rail extending in a straight shape, A support member slidably installed on the guide rail; The rotating body rotatably supported by the support member; And a load detector coupled through a magnetic suction device that is spaced apart when a force equal to or greater than a predetermined value is applied to the support member. delete The method of claim 1, The rotating body, A groove of the optical fiber bearing spiral spacer, having a through opening through which the optical fiber bearing spacer is inserted, and protrudingly installed a pin gauge having a tip portion fitted to the spiral groove around the opening. Inspection device. The method of claim 1, And said load detector is composed of a load cell in a sealed state. The method of claim 1, The groove pitch and groove inversion angle measuring unit, A velocity pulse generator for generating a signal corresponding to the progress of the spacers; The rotating body fitted to the spiral groove, A pulse for transmitting a rotation angle signal corresponding to the rotation angle, a rotation direction determination signal delayed or advanced from the rotation angle signal, and an inverted pulse signal accompanying the inversion of the spiral groove with the rotation of the rotating body; Generator, Receiving the rotation angle and rotation direction discrimination signal, the inversion position of the spiral groove is determined, the pulse of the speed pulse generator and the rotation angle signal are counted between adjacent inversion positions, and the groove pitch of the spiral groove is And a calculating device for calculating an inversion angle. The method of claim 5, wherein The pulse generator, And a pair of first and second pulse generators and a third generator arranged at predetermined intervals along the traveling direction of the optical fiber bearing spacer, Receiving a rotation direction determination signal of the third pulse generator, and forming a rotation direction determination unit for determining the rotation direction of the optical fiber bearing spacer, When the rotation angle signals of the first and second pulse generators coincide with each other, the rotation angle of the third pulse generator is detected as a counting start condition of the rotation angle signal, and a predetermined time after the counting of the rotation angle signal is started. And an inverted position and said computing device determine the inflection point detected after the elapse of time.

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