JP2012068088A - Filament body inspection device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To materialize bump inspection without a dead angle by a small-sized, light, and inexpensive filament body inspection device.SOLUTION: A pair of double door-shaped holders 25a and 25b pivoted to rotation shaft members 21a and 21b holds a left portion 29a and a right portion 29b of a divided die 29 divided into two pieces. In a round hole of the divided die 29, a KFRP 81 to be inspected is inserted. Coil springs 37a and 37b respectively energize the holders 25a and 25b in a closing position direction, and locking bolts 47a and 47b lock the holders to close portions. When a bump which is not less than a predetermined long diameter passes through the round hole of the divided die 29, by signals of reflection type photointerrupters 51a and 51b, a control device 61 detects an opening state of the holders to issue an alarm, and counts a number of bumps.

Description

  The present invention relates to a striate body inspection apparatus and method for inspecting a bump of a striate body such as an electric wire or a wire member.

  In recent years, FTTH (Fiber to the Home), which provides high-speed and large-capacity transmission using optical fibers to ordinary households, has been gaining popularity as a leading role in the broadband market. A drop cable is used to draw an optical fiber from a trunk cable into a house. The drop cable is black with an optical fiber core, Kevlar (registered trademark, generally aramid) fiber reinforced plastic (KFRP) as a tension member, and a support wire (steel wire) that supports its own weight. Molded with polyethylene.

  The KFRP production process includes, for example, immersing an epoxy resin tank in an aramid fiber bundle, removing excess resin with a drawing die, forming into a circular cross section, and curing the resin by heating. Then, after covering KFRP with high density polyethylene (HDPE), it is used as a member of the drop cable.

  If there is a partially swollen bump on the surface of such KFRP, the nipple of the extruder when it is covered with HDPE may be clogged and KFRP may be cut. For this reason, it is inspected whether KFRP has more than a predetermined bump over the entire length of KFRP.

  As an apparatus for inspecting a striatum, for example, a surface shape detection apparatus for a striatum described in Patent Document 1 is known. This device is used to detect irregularities that occur in the insulation coating during the extrusion process of electric wires, and detects irregularities based on the difference in detection signals between two light receiving elements that are separated from each other by a predetermined distance along the direction of electric wire conveyance. To do. However, the apparatus described in Patent Document 1 is an inspection of a striatum viewed from one direction, and often misses a hump hidden in a blind spot on the opposite side of the striatum.

  For this reason, as a conventional KFRP bump inspection, for example, as shown in FIG. 5, light is projected from light projectors 101 and 103 provided in two orthogonal directions, and a shadow image of KFRP 109 is captured by light receivers 105 and 107. Then, it has been inspected whether or not the KFRP has a knot larger than a predetermined major axis (the part having the longest diameter in the cross section perpendicular to the length direction of the striatum is called the major axis) by image analysis.

JP-A-9-264732

  However, the inspection apparatus using the image analysis method has a problem that the image pickup apparatus provided in the light receiver and the image analysis apparatus for analyzing the image picked up by the image pickup apparatus are large and require a large installation area, and the apparatus is expensive. There was a point.

  In addition, there is a problem that a bump at a blind spot (111 in FIG. 5) that is not reflected in the imaging device is missed even when inspected from two directions, and the bump detection cannot be performed accurately.

  In order to solve the above-described problems, an object of the present invention is to provide an inexpensive linear body inspection apparatus that is small and does not require a large installation area.

  In addition, the object of the present invention is to reliably detect a bump having a predetermined long diameter without missing a rib on the striatum due to the blind spot, and to detect a plurality of bumps having a predetermined long diameter on the striate to be inspected. An object of the present invention is to provide a striatum inspection device capable of automatically detecting each bump without human intervention.

  In order to achieve the above object, the present invention provides a striatum inspection device for inspecting whether or not a striate to be inspected has a bump having a predetermined major axis or more, and a predetermined striate through which the striatum is inserted. A cracking die having a round hole having a diameter and divided into left and right parts, a pair of holders that can be opened and closed like a double door, and a pair of holders, and a pair of holders, the left part of the cracking die And the elastic member urging to the closed position where the right part of the cracking die is close to form a round hole, and the pair of holders are in the closed position, or the left part of the cracking die and the right part of the cracking die And a sensor that detects whether the pair of holders is in the closed position when the major axis of the portion passing through the round hole of the filament is less than a predetermined diameter. The major axis of the part passing through the round hole of the filament is not less than the diameter of the round hole. Case, a pair of holders and the state of the open position, the pair of holder according to the sensor by detection of an open position, and summarized in that to determine the predetermined diameter or more Cobb is in the striatum.

  Further, in the striatum inspection device of the present invention, a determination unit that determines whether or not the striatum has a bump larger than a predetermined major axis based on a detection state of the sensor, and a determination unit that determines whether the striate has a major axis greater than a predetermined major axis. And an alarm unit that issues an alarm when it is determined that there is an alarm.

  In the striatum inspection device of the present invention, the control device may further include a bump counting unit that counts the number of bumps having a predetermined major axis or more.

  In the striate inspection apparatus of the present invention, the control device includes a position signal input unit that receives a position signal that is a signal related to a position in the length direction of the striate that has passed through the cracking die, and a coil having a predetermined major axis or more. And a bump position storage unit that stores position information in the length direction at the time when the bump is detected for each bump larger than a predetermined major axis.

  In the striatum inspection device of the present invention, the sensor may be a reflective photointerrupter or a transmissive photointerrupter.

  In addition, the present invention provides a closed hole having a round hole with a predetermined diameter, which has a round hole with a predetermined diameter, and the left and right parts of a split die divided into two parts, a left part and a right part, are close to each other. A striatum inspection method for inspecting whether or not the striatum to be inspected has a bump larger than a predetermined long diameter by using a striatum inspection device biased to a state, and in a round hole of a cracking die A step of passing one end of the striate, a step of driving the striate in the length direction so as to pass through the round hole over the entire length of the object to be inspected, and a left part of the cracking die from the closed state And a step of determining that there is a bump having a predetermined major axis or more in the linear body when it is detected that the right part of the cracking die is in an open state.

  According to the present invention, there is an effect that a small and simple installation can be provided, and an inexpensive striatum inspection apparatus can be provided.

  In addition, according to the present invention, without detecting the pits of the striatum due to the blind spot, it is possible to reliably detect pits having a predetermined major axis or more, and even if the striatum to be inspected has a plurality of galps having a predetermined major axis or more. There is an effect that it is possible to provide a striatum inspection device that can automatically detect each bump without human intervention.

It is a perspective view explaining embodiment of the striatum inspection device concerning the present invention. It is a principal part top view explaining the state at the time of the bump non-detection of a striatum inspection device. It is a principal part top view explaining the state at the time of detecting the bump of a striatum inspection device. It is a control block diagram explaining the detail of the control apparatus of a striatum inspection apparatus. It is a conceptual diagram explaining the blind spot in the conventional image analysis method.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view for explaining an embodiment of a striatum inspection device 1 according to the present invention. The striatum inspection device 1 includes a mechanism portion that is coupled to the XZ stage 3 and includes a cracking die 29, reflection type photointerrupters 51 a and 51 b that are sensors, and a control device 61.

  As the XZ stage 3, a commercially available manual XZ stage can be used. The XZ stage 3 adjusts the position of the table 5 in the Z-axis direction, the table 5 that is the top plate portion on which the moving object is fixed, the X-axis adjustment knob 7 for adjusting the position of the table 5 in the X-axis direction. A Z-axis adjusting knob 9, an X-axis fixing knob 11, and a Z-axis fixing knob 13.

  The XZ stage 3 is used to match the position of the center axis of a round hole 31 provided in a cracking die 29 described later with the position of the axis of a KFRP (striate body) to be inspected. When it is difficult to obtain the XZ stage 3, a commercially available XY stage can be arranged and used so that the position can be adjusted in the XZ direction of FIG.

  On the table 5, for example, a bracket 15 that is a two-step staircase formed by bending a rectangular aluminum plate at a right angle at two points is screwed with four screws 17. The base plate 19 is screwed to the bracket 15 with screws (not shown).

  The base plate 19 is provided with rotating shaft members 21a and 21b. A holder 25 a is rotatably provided on the rotation shaft member 21 a via a bearing 23. A holder 25 b is rotatably provided on the rotation shaft member 21 b via a bearing 23. The holders 25a and 25b form a pair of double doors that can be opened in a double door in the Y direction in the figure.

  The cracking die 29 is divided into a left part 29a and a right part 29b into left and right parts, and a round hole 31 having a predetermined diameter penetrating the cracking die 29 in the Y-axis direction in the drawing is provided in the center. The round hole 31 is a hole through which a striate body to be inspected is inserted, and the diameter of the round hole 31 is a long diameter (striate body) to be detected by a striate body to be inspected, for example, a partially swollen knot of KFRP. The portion with the longest diameter of the bump in the cross section perpendicular to the length direction is called the major axis). That is, the striatum inspection device 1 detects a bump having a major axis equal to or larger than the diameter of the round hole 31. Further, the cracking die 29 is provided with a conical recess 31 a for guiding the linear body to the round hole 31, and the apex portion of the recess 31 a communicates with the round hole 31.

  The holders 25a and 25b are provided with notches 27a and 27b, respectively, and the left and right portions 29a and 29b of the cracking die 29 are fitted into the notches 27a and 27b, respectively, and are fixed with screws 33, respectively. Yes.

  The holders 25a and 25b are provided with long holes 35a and 35b through which the coil springs 37a and 37b are inserted, respectively. One end portions of the coil springs 37a and 37b are fixed to the holders 25a and 25b by screws 39, respectively. The other ends of the coil springs 37a and 37b are fixed to coil spring latching portions 41a and 41b that are erected on the base plate 19, respectively. The lengths and spring constants of the coil springs 37a and 37b are selected so that the holders 25a and 25b can be urged with a desired force toward the closed position, respectively.

  Further, locking bolt holders 43a and 43b are fixed to the base plate 19 with screws 45, respectively. The locking bolt holders 43a and 43b are each cut through a screw hole penetrating in the Y direction in the figure, and the locking bolts 47a and 47b are screwed into the screw holes. The locking bolts 47a and 47b are adjusted by rotating in the forward and reverse directions so that their respective tips come into contact with the holders 25a and 25b in the closed position, and are fixed so as not to be loosened by the locking bolt fixing screws 49.

  FIG. 2 is a main part plan view for explaining the closed positions of the holders 25a and 25b of the striatum inspection device 1 of the present embodiment. The same reference numerals are given to the same components as the components of the striatum inspection device 1 in the perspective view shown in FIG.

  The KFRP 81 to be inspected is fed out from the striate body sending device below the figure. Then, the KFRP 81 that has passed the round hole 31 of the cracking die 29 and has been inspected is taken up by a linear body take-up device at the upper side of the figure.

  In FIG. 2, reflection type photo interrupters 51a and 51b are provided as sensors for detecting the open / closed states of the holders 25a and 25b. The reflection type photo interrupters 51a and 51b are sensors that optically detect whether or not there is a reflector that reflects light within a predetermined distance range, and a general commercial product can be used. Each of the reflection type photo interrupters 51a and 51b includes a light emitting diode (LED) as a light emitting unit and a phototransistor or a photo IC as a light receiving unit. A photo IC is a combination of a phototransistor or a photodiode and an integrated circuit (IC) that amplifies the output thereof. The reflection type photo interrupters 51 a and 51 b are connected to the control device 61.

  FIG. 2 is a main part plan view for explaining the closed positions of the holders 25a and 25b of the striatum inspection device 1 of the present embodiment. FIG. 3 is a main part plan view for explaining the open positions of the holders 25a and 25b of the striatum inspection device 1 of the present embodiment, and the striatum inspection device 1 detects a bump having a predetermined major diameter or more. State.

  As shown in FIG. 2, when the holder 25a is in the closed position, the light emitted from the light emitting unit of the reflective photo interrupter 51a is not reflected by the bottom surface of the holder 25a and does not reach the light receiving unit. Similarly, when the holder 25b is in the closed position, the light emitted from the light emitting unit of the reflective photo interrupter 51b is not reflected by the bottom surface of the holder 25b and does not reach the light receiving unit.

  The holders 25a and 25b are normally in the closed position by the coil springs 37a and 37b that urge the holders 25a and 25b toward the closed position and the locking bolts 47a and 47b. In other words, the state in which the holders 25a and 25b are in the closed position is a state in which the striatum inspection device 1 does not detect a bump having a predetermined major diameter or more. If the holders 25a and 25b are both in the closed position, the sensor signals of the reflective photointerrupters 51a and 51b both indicate that no reflected light is detected, and the control device (not shown) does not have a bump larger than a predetermined long diameter of the filament. Judged as a state.

  When inspecting the striatum, the striate is passed through the round hole 31 of the cracking die 29 so that the striate is passed through the round hole 31 over the entire length of the striate inspection object. Drive. If there is a bump having a predetermined major axis or more in the striate body, a force that pushes the left part 29a and the right part 29b of the cracking die 29 left and right works. The holders 25a and 25b for holding the left portion 29a and the right portion 29b of the cracking die 29 by the force that the cove pushes the cracking die in the opposite directions from each other around the rotary shaft members 21a and 21b. Rotate to move to the open position. FIG. 3 illustrates this state. However, the open position is not a single position, unlike the closed position, and the width of the gap between the left portion 29a and the right portion 29b of the cracking die 29, in other words, the rotating shaft member, according to the long diameter of the ribs of the linear body The rotation angles of the holders 25a and 25b around 21a and 21b are different.

  As shown in FIG. 3, when the holder 25a is in the open position, the light emitted from the light emitting portion of the reflective photointerrupter 51a is reflected by the bottom surface of the holder 25a and reaches the light receiving portion of the reflective photointerrupter 51a. Similarly, when the holder 25b is in the open position, the light emitted from the light emitting part of the reflective photointerrupter 51b is reflected by the bottom surface of the holder 25b and reaches the light receiving part of the reflective photointerrupter 51b. If at least one of the reflection type photointerrupters 51a and 51b detects reflected light, the control device 61 determines that the filament has a bump having a predetermined major diameter or more. If the bump passes through the cracking die 29, the holders 25a and 25b are both closed by the coil springs 37a and 37b, and the state returns to the state shown in FIG.

  In FIG. 3, the holders 25 a and 25 b are both shown in the open position. However, depending on the shape of the bump, the friction coefficient between the bump and the cracking die 29, etc. Even if there is a bump, it is conceivable that only one of the holders 25a, 25b is in the open position and the other is in the closed position. For this reason, in the present embodiment, reflective photo interrupters 51a and 51b are provided corresponding to the respective holders 25a and 25b. However, when the wire body has a bump having a predetermined major axis or more, if both the holders 25a and 25b are always opened, the sensor may be provided only on one of the holders.

  FIG. 4 is a control block diagram illustrating a configuration example of the control device 61. In the figure, a control device 61 includes a sensor signal input unit 63, a current supply unit 65, a determination unit 67, an alarm output unit 69, a position signal input unit 71, a bump position storage unit 73, and a bump counting unit. 75.

  The sensor signal input unit 63 inputs reflected light detection signals from the reflection type photo interrupters 51a and 51b via the cables 53a and 53b, respectively. Next, comparing the reflected light detection signal with a predetermined discriminant value (threshold value), if the reflected light detection signal is greater than or equal to the discriminant value, the binary signal in which reflected light is present, that is, the corresponding holder is open is determined. If the reflected light detection signal is less than the discriminant value, a binary signal indicating that there is no reflected light, that is, the corresponding holder is in a closed state is output to the determination unit 67.

  The current supply unit 65 supplies a lighting current to the LEDs that are the light emitting units of the reflective photointerrupters 51a and 51b via the cables 53a and 53b.

  If the binary signals indicating the open / closed states of the holders 25a and 25b output from the sensor signal input unit 63 both indicate the closed state, the determination unit 67 detects a bump having a predetermined long diameter or more of the linear body. It is determined that it is not. Further, the determination unit 67 is configured to detect a coil having a length greater than or equal to a predetermined major axis of the linear body if at least one of the binary signals indicating the open / closed states of the holders 25a and 25b output from the sensor signal input unit 63 indicates the open state. It is determined that the state is detected. If it determines with the determination part 67 having detected the bump more than the predetermined | prescribed long diameter of a striatum, while making the alarm output part 69 generate | occur | produce the alarm by light or a sound, a memory | storage instruction | indication signal to the hump position storage part 73 And a count signal is output to the bump counting unit 75. The bump counting unit 75 increases the number of bumps held in the built-in counter by one.

  The position signal input unit 71 determines the length of the line body to be inspected by using the capstan rotation signal or the winding bobbin rotation signal of the wire body winding apparatus that winds the wire body inspected by the line body inspection apparatus. Input as a position signal related to the position in the direction. The capstan rotation signal or the take-up bobbin rotation signal is a pulse signal generated at every constant rotation angle of the capstan or the take-up bobbin. The position signal input unit 71 counts this pulse signal, converts it into position information of the striate passing through the cracking die, and outputs the converted position information to the bump position storage unit 73.

  The bump position storage unit 73 includes a plurality of storage areas and an address counter that designates the storage areas. Each time the storage instruction signal is input from the determination unit 67, the bump position storage unit 73 stores the position information input from the position signal input unit 71 in the storage area designated by the address counter, and counts up the address counter.

  Although not shown in FIG. 4, the control device 61 is provided with a display unit so that the number of bumps counted by the bump counting unit 75 and the position information of the bumps stored in the bump position storage unit 73 can be displayed. It is preferable. The control device 61 may be provided with a communication unit so that the number of bumps and the position information of the bumps can be communicated to other control systems.

  In the present embodiment, since the reflection type photo interrupters 51a and 51b are used as sensors, if the discriminating value of the sensor signal input unit 63 is adjusted at the time of installation of the striatum inspection device 1, no adjustment is performed thereafter, and the blind spot is detected. This makes it possible to perform accurate bump detection.

  Next, a method for inspecting a striatum using the striatum inspection device 1 of the present embodiment will be described.

  The first step is a step in which an operator inserts one end portion of the striate body to be inspected into the round hole 31 provided in the left and right split dies 29. More specifically, the operator pulls out one end portion of the wire rod from the wire rod feeding device, inserts it into the round hole 31 provided in the left and right split dies 29, and further, this one end portion is inserted into the wire rod. Set so that the body winding device can be wound. At this time, the operator operates the X-axis adjustment knob 7 and the Z-axis adjustment knob 9 of the XZ stage 3 to adjust the travel position of the striate so that it passes through the center of the round hole 31. The shaft fixing knob 11 and the Z axis fixing knob 13 are set to the lock position.

  In the second step, the wire rod feeding device and the wire rod winding device are operated so that the wire rod passes through the round hole 31 of the cracking die 29 over the entire length of the object to be inspected. This is a step of driving in the Y direction of FIG.

  The third step is that the control device 61 is in an open state in which the left portion 29a and the right portion 29b of the cracking die 29 are separated from each other based on the output signals of the reflective photointerrupters 51a and 51b, which are sensors. It is a step of determining that there is a bump larger than a predetermined major axis in the striatum when detected.

  According to the present embodiment described above, since the cracking die having a round hole is used, it is possible to provide a small and easy installation and a low cost striatum inspection device and striatum inspection method. .

  In addition, according to the present embodiment, without detecting the pits of the striatum due to the blind spot, the stubs having a predetermined major axis or more are reliably detected, and the striatum to be inspected has a plurality of galps having a predetermined major axis or more. In addition, there is an effect that it is possible to provide a striatum inspection apparatus that can automatically detect each bump without human intervention.

  Moreover, according to this embodiment, there exists an effect that the number of the bumps more than the predetermined | prescribed long diameter on a linear body can be counted.

  Further, according to the present embodiment, the position of the bumps having a predetermined major diameter or more on the striatum can be stored for each pit, and the humb of the striatum is corrected using the stored position of the knobs, or There is an effect that it is possible to easily select a portion which is determined to be normal without a bump having a longer diameter or more.

  In the above-described embodiment, the reflection type photo interrupter is used as a sensor for detecting that the pair of holders respectively holding the left part and the right part of the cracking die are changed from the closed position to the open position. However, the sensor is not limited to the reflection type photo interrupter, and any sensor may be used as long as the open / close state of the holder can be detected.

  For example, when the holders 25a and 25b are both in the closed position, the light emitted from the light emitting unit reaches the light receiving unit, and when at least one of the holders 25a and 25b is in the open position, the light emitted from the light emitting unit is blocked by the holder and received. A light transmission type photo interrupter may be provided at a position where the light projection direction is the X-axis direction in FIG. When a conductive member such as metal is used for the holder, a capacitance sensor that detects the capacitance between the electrode of the sensor and the holder can be used. Further, if a magnetic material is used for the holder or a magnetic material is attached, a magnetic sensor such as a Hall element or a magnetoresistive element that detects a magnetic field can be used.

  As mentioned above, although this invention was demonstrated in detail using embodiment, this invention is not limited to embodiment described in this specification. The scope of the present invention is determined by the description of the claims and the scope equivalent to the description of the claims.

DESCRIPTION OF SYMBOLS 1 Linear body inspection apparatus 3 XZ stage 5 Table 7 X-axis adjustment knob 9 Z-axis adjustment knob 11 X-axis adjustment knob 13 Z-axis adjustment knob 15 Bracket 19 Base plate 21 Rotating shaft member 23 Bearing 25 Holder 29 Cracking die 29a Left part 29b Right part 31 Round hole 31a Recess 35 Long hole 37 Coil spring 41 Coil spring latching part 43 Locking bolt holder 47 Locking bolt 51 Reflective type photo interrupter (sensor)
53 Cable 61 Control device 63 Sensor signal input unit 65 Current supply unit 67 Judgment unit 69 Alarm output unit 71 Position signal input unit 73 Cobb position storage unit 75 Cobb count unit 81 KFRP (striated body)
81a Cobb

Claims (6)

A striatum inspection device that inspects whether or not the striatum to be inspected has a bump larger than a predetermined major axis,
A cracking die having a round hole having a predetermined diameter through which the striate body is inserted and divided into left and right;
While holding each one of the cracking dies, a pair of holders that can be opened and closed like a double door,
An elastic member for biasing the pair of holders to a closed position in which a left portion of the cracking die and a right portion of the cracking die are adjacent to form the round hole;
A sensor that detects whether the pair of holders is in the closed position or an open position in which a left part of the cracking die and a right part of the cracking die are separated from each other;
When the major axis of the portion passing through the round hole of the linear body is less than the predetermined diameter, the pair of holders is in a closed position,
When the major axis of the portion passing through the round hole of the linear body is equal to or larger than the diameter of the round hole, the pair of holders is in an open position,
An apparatus for inspecting a striatum according to the present invention, wherein the sensor detects that the pair of holders are in an open position and the striatum has a bump having a predetermined major diameter or more.   Based on the detection state of the sensor, a determination unit that determines whether or not the filament has a bump larger than a predetermined major axis, and an alarm when the determination unit determines that there is a bump larger than a predetermined major axis The striatum inspection device according to claim 1, further comprising a warning unit that emits the control unit as a control device.   The striation body inspection device according to claim 2, wherein the control device further includes a bump counting unit that counts the number of bumps having a predetermined major axis or more. The control device includes a position signal input unit that receives a position signal that is a signal related to a position in a length direction of the linear body that has passed through the cracking die;
A hump position storage unit that stores position information in the length direction at the time of detecting a hump with a predetermined major axis or more for each hump with a predetermined major axis or more;
The striatum inspection device according to claim 2 or 3, further comprising:   5. The striatum inspection device according to claim 1, wherein the sensor is a reflective photointerrupter or a transmissive photointerrupter. 6. A closed state in which the left part and the right part of a split die having a round hole with a predetermined diameter divided into two parts, a left part and a right part, are adjacent to each other to form the round hole with the predetermined diameter. A striatum inspection method for inspecting whether or not the striatum to be inspected has a bump larger than a predetermined major axis using an energizing striatum inspection device,
Passing one end of the filament through the round hole of the cracking die;
Driving the linear body in the length direction so as to pass through the round hole over the entire length of the inspection object of the linear body;
A step of determining that there is a bump larger than a predetermined major diameter in the linear body when it is detected that the left portion of the cracking die and the right portion of the cracking die are separated from the closed state. When,
A striatum inspection method characterized by comprising:

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