CN113465486A - Inspection device for inspecting terminal portion of shielded electric wire and method for diagnosing performance thereof - Google Patents
Inspection device for inspecting terminal portion of shielded electric wire and method for diagnosing performance thereof Download PDFInfo
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- CN113465486A CN113465486A CN202110346937.4A CN202110346937A CN113465486A CN 113465486 A CN113465486 A CN 113465486A CN 202110346937 A CN202110346937 A CN 202110346937A CN 113465486 A CN113465486 A CN 113465486A
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- braid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/68—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board
- G01R31/69—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board of terminals at the end of a cable or a wire harness; of plugs; of sockets, e.g. wall sockets or power sockets in appliances
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
- Processing Of Terminals (AREA)
- Insulated Conductors (AREA)
Abstract
An inspection device is configured to inspect whether or not the size of the rear end of a braid turn-back portion (Wd1) of a termination portion of a shielded electric wire (W) is within an appropriate range. The inspection apparatus includes: a first chuck probe (11) electrically connected to the shield terminal (1) in a closed state; a second chuck probe (12) which contacts the braid folded-back portion (Wd1) when the size of the braid folded-back portion (Wd1) is out of an appropriate range; a self-diagnostic probe (13) which is supported in a conductive state with the second chuck probe (12) and is in a contact conductive state with the first chuck probe (11) in an open state; and a computer (50) configured to detect whether the first chuck probe (11) and the second chuck probe (12) are in a conductive state therebetween.
Description
Technical Field
One or more embodiments of the present invention relate to an inspection device for inspecting whether or not the size of a terminating portion of a shielded electric wire, particularly a braid turn-back portion, is within an appropriate range, and to a performance diagnosis method for diagnosing whether or not the inspection device is operating properly.
Background
As the shielded electric wire, a shielded electric wire in which an outer side of a core (one or more insulated electric wires) is covered with a braid and an outer side of the braid is covered with a sheath (resin sheath) is widely used. When a shield terminal is attached to an end of such a shield electric wire, a sheath having a predetermined length is peeled off from the end of the electric wire to expose a braid, the exposed braid is folded back to cover an outer periphery of the end of the remaining sheath, and a braid crimping portion of the shield terminal is crimped and fixed to the folded portion.
When the length of the braid turn-back portion of the shielded electric wire is larger than a prescribed size, the end of the shell extends beyond the excess length portion of the braid and the portion is cut, and the cut piece of the braid affects the performance of the connector, which may cause a defect. Thus, JP- ｃA-2002-. That is, in this technique, generally, when the length of the braid is equal to or greater than a specified length, the braid is excessively long because the chucks are in a conductive state and thus determined as a defective product (defective product), and when the length of the braid is within a specified length range, the length of the braid is within a specified range because the chucks are in a non-conductive state and thus determined as a good product (acceptable product).
Disclosure of Invention
However, in the above-described related art, when disconnection or the like occurs in the wiring system of the conductive chuck, the conductive chuck is detected as being in a non-conductive state due to the occurrence of the disconnection. Therefore, even if the target product to be inspected is a defective product (in which the conductive state should be detected in the normal inspection), the target product may be erroneously judged as a good product due to the detection of the non-conductive state.
One or more embodiments of the present invention have been made in view of the above circumstances, and an object of the present invention is to provide an inspection apparatus for a terminating portion of a shielded electric wire, which is capable of reliably determining a defective product (defective product) as a defective product and performing self-diagnosis so as not to erroneously determine the defective product as a good product, and a performance diagnosis method for diagnosing whether the inspection apparatus is operating properly.
One or more embodiments of the present invention provide an inspection device for a terminating portion of a shielded electric wire, the terminating portion being provided at a leading end portion of the shielded electric wire, the shielded electric wire including: a wire core; a braid covering the outside of the core; and a sheath covering an outside of the braid, the terminating portion including a braid turn-back portion obtained by turning back an exposed portion of the braid, which is formed by removing a portion of the sheath having a predetermined length from a wire end, to an outer periphery of a front end portion of a remaining portion of the sheath, the braid turn-back portion being crimped and fixed by a braid crimping portion provided at a rear end of the shield terminal, the inspection device being configured to inspect whether a size of a rear end of the braid turn-back portion of the terminating portion of the shield electric wire is within an appropriate range, the inspection device including: a first chuck probe configured to be capable of being opened and closed, the first chuck probe being in contact with and electrically connected to the shield terminal when the first chuck probe is in a closed state; a second chuck probe supported in a non-contact state with the first chuck probe, the second chuck probe being in a non-contact state with respect to the braid folded-back portion when the size of the braid folded-back portion is within an appropriate range, the second chuck probe being in a contact conductive state with respect to the protruding portion of the braid folded-back portion when the size of the braid folded-back portion is out of the appropriate range; a self-diagnosis probe supported in a state of being electrically conductive with the second chuck probe, the self-diagnosis probe being in a contact conductive state with the first chuck probe when the first chuck probe is in an open state, and being in a non-contact state with the first chuck probe when the first chuck probe is in a closed state; and a conductive state detecting device for detecting whether the first chuck probe and the second chuck probe are in a conductive state.
One or more embodiments of the present invention provide a method for diagnosing performance of an inspection apparatus for shielding a terminating portion of a wire, the method including: preparing an inspection jig corresponding to a defective inspection target product, the inspection jig having an external shape imitating an inspection target product, as an inspection device for shielding a terminating part of an electric wire, the inspection jig including a first portion contacting a first chuck probe in a closed state and a second portion contacting a second chuck probe in the closed state, the first portion and the second portion being set to a conductive state; bringing the first and second chuck probes in a closed state relative to the inspection fixture; and checking whether the first chuck probe and the second chuck probe are in a conductive state by a conductive state detecting means of the checking apparatus while the first chuck probe and the second chuck probe are in a closed state.
According to one or more embodiments of the present invention, the self-diagnosis of the performance of the apparatus can be automatically performed in a state where the first chuck probe is turned on every time the normal conduction check is performed once. Therefore, erroneous judgment (even if the product is a defective product, the product is erroneously judged as a non-defective product due to a failure in the inspection apparatus) can be prevented in advance, and the reliability of the inspection apparatus can be improved.
One or more embodiments of the present invention have been briefly described above. Further, details of the present invention will be clarified by reading a mode for carrying out the present invention (hereinafter referred to as "embodiment") which will be described below with reference to the drawings.
Drawings
Fig. 1A and 1B are schematic diagrams of an inspection apparatus according to an embodiment of the present invention, in which fig. 1A is a plan view showing a state in which each chuck is closed, and fig. 1B is a plan view showing a state in which each chuck is opened.
Fig. 2 is a perspective view showing a state where each chuck of the inspection apparatus according to the embodiment of the present invention is closed.
Fig. 3 is a perspective view showing a state where each chuck of the inspection apparatus according to the embodiment of the present invention is opened.
Fig. 4 is a flowchart showing a processing flow of self-inspection (self-diagnosis) by the inspection apparatus of the present embodiment.
Fig. 5A to 5D are views for illustrating an inspection target, in which fig. 5A is a view illustrating an example of a structure of a shielded electric wire as an inspection target, fig. 5B is a view illustrating an intermediate processing state of a terminal portion of the shielded electric wire, fig. 5C is a view illustrating an example of a good product of the terminal portion after attaching the shielded terminal, and a state in which a braid crimping portion of the shielded terminal is crimped and fixed to a braid folded-back portion whose length satisfies a regulation, and fig. 5D is a view illustrating an example of a defective product of the terminal portion after attaching the shielded terminal, and a state in which the braid crimping portion of the shielded terminal is crimped and fixed to a braid folded-back portion whose length exceeds the regulation.
Detailed Description
Specific embodiments according to the present invention will be described with reference to the accompanying drawings.
First, an example of an inspection target in the inspection apparatus of the present embodiment will be described.
Fig. 5A to 5D are views for explaining an inspection target. Fig. 5A is a view showing a structural example of a shielded electric wire as an inspection target, and fig. 5B is a view showing an intermediate processing state of a terminal portion of the shielded electric wire.
As shown in fig. 5A, the shielded electric wire W as an inspection target here has a structure in which the outside of a wire core W1 including a signal wire Wa and an insulator Wb surrounding the outer periphery of the signal wire Wa is covered with a braid Wd made of metal via a metal foil Wc, and the outside of the braid Wd is covered with a sheath We made of edge resin. The shielded electric wire W shown in fig. 5A is merely an example, and the structure of the shielded electric wire is not limited thereto. The number of the wire cores W1 is optional, and may be singular (in the case of a coaxial cable) or plural (in the case of an ethernet (registered trademark) cable or the like). A drain wire may be included in the metal foil Wc. The metal foil Wc may be omitted.
As shown in fig. 5B, when the shield terminal is connected to the end of such a shield electric wire W, the sheath We having a predetermined length is removed from the electric wire end, and the exposed braid Wd is folded back to cover the outer periphery of the end of the remaining sheath We, thereby forming a braid folded-back portion Wd 1. In many cases, an annular sleeve (also referred to as a ferrule) 2 made of metal (or made of resin) is mounted on the outer periphery of the end portion of the sheath We, and the braid Wd is folded back to cover the outer periphery of the sleeve 2, thereby forming a braid folded-back portion Wd 1. When the metal foil Wc is lower than the braid Wd, the metal foil Wc is removed within a predetermined range.
Fig. 5C is a view showing an example of a good product of the terminating portion after the shield terminal is attached, and a state in which the braid crimping portion of the shield terminal is crimped and fixed to the braid turn-back portion having a length satisfying the regulation. Fig. 5D is a view showing an example of a defective product of the terminating portion after the shield terminal is attached, and a state in which the braid crimping portion of the shield terminal is crimped and fixed to the braid turn-back portion having a length exceeding a prescribed length.
As shown in fig. 5C and 5D, the braid crimping portion 1b of the rear end of the shield terminal 1 is crimped and fixed to the braid folded-back portion Wd1, and the shield terminal 1 is formed into a housing 1a having a rectangular tubular front end. In this case, the braid folded-back portion Wd1 is inserted between the sleeve 2 and the braid crimping portion 1b of the shield terminal 1, so that the braid Wd is firmly crimped and fixed. The shield terminal 1 includes an inner terminal (not shown) inside the housing 1a via an insulator, and the inner terminal may further include a signal line (a center conductor in the case of a coaxial cable).
In the inspection apparatus of the present embodiment, a terminal end portion of the shield electric wire W in which the braid turn-back portion Wd1 is formed on the outer periphery of the sleeve 2 as described above is set as a product to be inspected, and the braid crimping portion 1b at the rear end of the shield terminal 1 is crimped and fixed to the braid turn-back portion Wd 1.
As shown in fig. 5C, in the terminating portion of the shielded electric wire W as a product to be inspected, the length of the rear end of the braid turn-back portion Wd1 particularly needs to be within a range (appropriate range) that does not protrude from the rear end edge 2a of the sleeve 2. However, as shown in fig. 5D, the thin wires constituting the braid Wd may protrude from the rear end edge 2a of the sleeve 2. That is, the rear end of the braid folded-back portion Wd1 is too large in size. In the above case, it is necessary to judge that the product is a defective product, and the inspection apparatus of the present embodiment is used for determination.
Whether the size of the rear end of the braid folded-back portion Wd1 is too large is determined by bringing the electrodes 11, 12 (a first chuck probe 11 and a second chuck probe 12 described later) into contact with the outer surface of a member (here, the shield terminal 1) electrically connected to the braid Wd and the outer peripheral surface of the sheath We at a position close to the rear end edge 2a of the sleeve 2, respectively, and determining whether the electrodes 11, 12 are electrically connected to each other.
As shown in fig. 5D, when the electrode 12 in contact with the outer peripheral surface of the sheath We is in contact with the braid Wd protruding on the sheath We, the electrodes 11, 12 are electrically connected to each other, and therefore the braid turned-back portion Wd1 can be judged to be too long (i.e., determined to be a defective product). In addition, as shown in fig. 5C, if the electrode 12 in contact with the outer peripheral surface of the sheath We is not in contact with the braid Wd, the electrodes are not electrically connected to each other, and therefore it can be judged that the braid folded-back portion Wd1 is not too long (i.e., is determined to be a qualified product).
Fig. 1A and 1B are schematic diagrams of an inspection apparatus for a terminating portion of a shielded electric wire according to an embodiment of the present invention, in which fig. 1A is a plan view showing a state in which each chuck is closed, and fig. 1B is a plan view showing a state in which each chuck is opened. Fig. 2 is a perspective view showing a state where each chuck of the inspection apparatus according to the present embodiment is closed. Fig. 3 is a perspective view showing a state where each chuck is opened.
As shown in fig. 1 to 3, the inspection apparatus of the present embodiment includes three chucks 10, 11, 12 which are opened and closed with respect to a shield electric wire W. In fig. 1A and 1B, the closing operation direction of each chuck 10, 11, 12 is indicated by an arrow a, and the opening operation direction is indicated by an arrow B.
The chuck located on the rearmost end side (position distant from the end) of the shield electric wire W is the electric wire chuck 10. The wire chuck 10 is a general chuck having no electrode function. The wire chuck 10 is configured to be opened and closed, and has a function of accommodating therein the shielded wire W in an opened state and reliably holding the shielded wire W at a fixed position by being in a closed state.
The chuck located at the foremost side of the shield electric wire W is the first chuck probe 11 having the electrode function. The first chuck probes 11 can accommodate the shield terminal 1 attached to the front end of the shield electric wire W in the open state, and contact and electrically connect with both outer side surfaces of the shield terminal 1 in the closed state. The first chuck probe 11 is formed as a wide block so as to be sandwiched and reliably brought into contact with the outer side surface of the housing 1a of the shield terminal 1.
A second chuck probe 12 capable of being opened and closed is disposed between the wire chuck 10 and the first chuck probe 11 in the longitudinal direction of the shield wire W. The second chuck probe 12 has an electrode function, and is configured such that the engaging portions of the pair of thin blade-shaped chuck members are formed in a semicircular groove shape, and when the semicircular groove shape portions are closed, the second chuck probe 12 is formed in a cylindrical shape and can be reliably brought into contact with substantially the entire circumference of the target portion of the shield electric wire W.
The second chuck probe 12 is supported so as not to be electrically connected to the first chuck probe 11. The second chuck probe 12 defines an appropriate range of the rear end dimension of the braid turned-back portion Wd1 on the rear side of the braid turned-back portion Wd1 of the terminal portion of the shield electric wire W, and contacts the outer periphery of the sheath We at a position close to the rear side of the rear end edge 2a of the sleeve 2. That is, when the size of the rear end of the braid folded-back portion Wd1 is within the appropriate range, the second chuck probe 12 is in a non-contact state (non-conductive state) with the braid folded-back portion Wd1, and when the size of the rear end of the braid folded-back portion Wd1 is outside the appropriate range, the second chuck probe 12 is in a contact state (conductive state) with the braid folded-back portion Wd1 which is out of the appropriate range.
The first chuck probe 11 and the second chuck probe 12 may be entirely made of metal, and at least a part which is in contact with or may be in contact with at least the shield terminal 1 or the braid folded-back portion Wd1 may be made of metal. The wire chuck 10, the first chuck probe 11, and the second chuck probe 12, which can be opened and closed, are provided on the slide bases 20, 21 so as to be able to slide stably in the radial direction of the shield wire W.
The inspection apparatus includes a self-diagnosis probe 13 in addition to the first chuck probe 11 and the second chuck probe 12 described above. The self-diagnosis probe 13 is supported in a normally conductive state in which it is electrically conductive with the second chuck probe 12 via, for example, a wire 63, and is fixedly disposed behind the first chuck probe 11 in the opening/closing direction such that the self-diagnosis probe 13 is in a contact conductive state with the first chuck probe 11 when the first chuck probe 11 is opened, and the self-diagnosis probe 13 is in a non-contact state with the first chuck probe 11 when the first chuck probe 11 is closed.
Further, the inspection apparatus includes a computer 50 for determination as a conductive state detection device. The computer 50 is a general-purpose computer including a CPU 51, a ROM 52, a RAM 53, an input port 54, and an output port 55, and the computer 50 is connected to a display unit 56 for displaying a determination result and the like. The wiring 61 connected to the first chuck probe 11 is connected to the output port 55 of the computer 50, and the wiring 62 connected to the second chuck probe 12 is connected to the input port 54.
During the normal inspection, as shown in fig. 1A and 2, when the first chuck probe 11 and the second chuck probe 12 in the off state are in the conductive state with each other, the computer 50 detects that the conductive state sensing current output from the output port 55 is received by the input port 54 (returned to the input port 54) through a path of the output port 55 → the wiring 61 → the first chuck probe 11 → the second chuck probe 12 → the wiring 62 → the input port 54. Accordingly, the computer 50 judges that the first chuck probe 11 and the second chuck probe 12 are in a conductive state. Further, when the first and second chuck probes 11 and 12 in the off state are not in the conductive state (in the non-conductive state), the computer 50 judges that the first and second chuck probes 11 and 12 are not in the conductive state, i.e., in the non-conductive state, because the conductive-state sensing current does not flow to the input port 54 even though the conductive-state sensing current is output from the output port 55.
As shown in fig. 1B and 3, when the first chuck probe 11 is opened, the first chuck probe 11 and the self-diagnosis probe 13 are in a conductive relationship. That is, the first chuck probe 11 and the second chuck probe 12 are in a conductive state with each other via the self-diagnosis probe 13.
Therefore, if there is no problem during non-inspection (when the first chuck probe 11 and the second chuck probe 12 are opened), the computer 50 detects that the conduction state sensing current output from the output port 55 is received by the input port 54 through the path of the output port 55 → the wiring 61 → the first chuck probe 11 → the self-diagnosis probe 13 → the wire 63 → the second chuck probe 12 → the wiring 62 → the input port 54. Therefore, the computer 50 judges that no problem such as disconnection occurs in the system of the wirings 61, 62 connected to the first chuck probe 11 and the second chuck probe 12, respectively.
When the current is not returned to the input port 54 through the above path, the computer 50 judges that a problem such as disconnection may occur somewhere in the system of the wirings 61, 62 connected to the first chuck probe 11 and the second chuck probe 12, respectively.
Next, the operation will be described.
During the inspection, the wire chuck 10, the first chuck probe 11 and the second chuck probe 12 are all closed with respect to the shield wire W and the shield terminal 1 arranged at the fixed position. Then, the first chuck probe 11 is brought into contact with and electrically connected to the shield terminal 1 (housing 1 a). On the other hand, the second chuck probe 12 is disposed in the vicinity of the rear end of the braid folded-back portion Wd1 while maintaining a position for determining whether the size of the rear end of the braid folded-back portion Wd1 is within an appropriate range. When the size of the rear end of the braid folded-back portion Wd1 is within an appropriate range, the braid Wd is maintained in a non-contact state with the second chuck probe 12. When the size of the rear end of the braid folded-back portion Wd1 is out of the appropriate range, the braid Wd comes into contact conduction with the second chuck probe 12.
Accordingly, the computer 50 can determine whether the size of the rear end of the braid folded-back portion Wd1 is within an appropriate range by checking whether the first chuck probe 11 is electrically connected to the second chuck probe 12.
More specifically, when the computer 50 having a function as a conductive state detecting means detects that the first chuck probe 11 and the second chuck probe 12 are in a non-conductive state in a state where the first chuck probe 11 and the second chuck probe 12 are in a closed state (i.e., a state where a chuck operation for inspection is performed), the computer 50 determines that the size of the rear end of the braid turn-back portion Wd1 as an inspection target product is within an appropriate range, and judges that the inspection target product is a good product (a good product).
On the other hand, when the computer 50 detects that the first chuck probe 11 and the second chuck probe 12 are in the conductive state in a state where the first chuck probe 11 and the second chuck probe 12 are in the closed state (i.e., a state where the chuck operation for inspection is performed), the computer 50 determines that the size of the rear end of the braid turn-back portion Wd1 as the inspection target product is out of the appropriate range, and judges that the inspection target product is a defective product (defective product). That is, it is checked whether the length of the rear end of the braid turn-back portion Wd1 of the terminating portion of the shield electric wire W is greater than a specified length by the closing operation of the first chuck probe 11 and the second chuck probe 12.
In the self-diagnosis, when the computer 50 detects that the first chuck probe 11 and the second chuck probe 12 are in the conductive state in a state where the first chuck probe 11 is opened (i.e., a state where the conduction inspection of the inspection target product is not performed), the computer 50 determines that a defect such as disconnection does not occur in the system of the wirings 61, 62 of the first chuck probe 11 and the second chuck probe 12, and judges that the performance of the inspection apparatus is normal.
On the other hand, when the computer 50 detects that the first chuck probe 11 and the second chuck probe 12 are in a non-conductive state although the first chuck probe 11 and the second chuck probe 12 are kept in a conductive relationship with each other via the self-diagnosis probe 13 in a state where the first chuck probe 11 is opened (i.e., a state where the conduction check of the inspection target product is not performed), the computer 50 determines that there is a possibility that a defect such as a disconnection occurs in the system of the wirings 61, 62 of the first chuck probe 11 and the second chuck probe 12 and that the normal check cannot be performed, and judges that there is an abnormality in the performance of the inspection apparatus.
As described above, the self-diagnosis of the device performance can be automatically performed in a state where the first chuck probe 11 is turned on every time the normal conduction check is performed once. Therefore, erroneous judgment of a defective product (although it is a defective product, it is erroneously judged as a non-defective product due to a failure in the inspection apparatus) can be prevented in advance, and the reliability of the inspection apparatus can be improved.
Here, the processing flow of the self-diagnosis (self-check) will be briefly described with reference to the flowchart of fig. 4.
As shown in fig. 4, when the self-checking flow starts, the computer 50 checks in step S101 whether the normal conduction check is completed. After waiting for completion of the conduction check, the computer 50 proceeds to the next steps S102, S103 to check whether the first chuck probe 11 and the second chuck probe 12 are turned on. When the first chuck probe 11 and the second chuck probe 12 are turned on, the computer 50 proceeds to the next step S104 and starts to supply a current (a conduction state detection current for self-diagnosis) to the first chuck probe 11. Then, when a current is detected in the second chuck probe 12 in the next step S105, the computer 50 outputs a normal judgment in step S106, that is, the wiring system is properly maintained due to the establishment of conduction. In contrast, when no current is detected in the second chuck probe 12 in step S105, the computer 50 outputs a judgment of abnormality in step S107, that is, the wiring system is not properly maintained due to non-conduction (a failure such as disconnection may have occurred). The self-checking flow ends by the judgment outputs in S106 and S107.
As another effect, according to the inspection apparatus, the wire chuck 10 is disposed at the rear side of the second chuck probe 12, so that the shield wire W is stably held and the inspection is accurately performed.
According to this inspection device, a product in which the braid Wd protrudes from the rear end edge 2a of the sleeve 2 can be regarded as a defective product, so that the length of the braid turn-back portion Wd1 can be specified based on the position of the rear end edge 2a of the sleeve 2.
As described above, in the inspection apparatus, when the first chuck probe 11 and the second chuck probe 12 are turned off during the inspection operation, the inspection target product is judged as a good product by detecting that the first chuck probe 11 and the second chuck probe 12 are in a non-conductive state.
However, when a contact failure occurs where the first chuck probe 11 or the second chuck probe 12 should contact, the first chuck probe 11 and the second chuck probe 12 may be detected as being in a non-conductive state as in the case of a judged product. Therefore, when the inspection apparatus is used, it is desirable to perform the following performance diagnosis between normal inspections.
In this case, the inspection jig 100 corresponding to the defect inspection target product is used as the inspection target product. The inspection jig 100 has an appearance shape imitating an inspection target product, and sets a conductive state between a portion contacting the first chuck probe 11 in a closed state and a portion contacting the second chuck probe 12 in the closed state. That is, as the inspection jig 100, a jig having the same size in the width direction as the housing 1a of the shield terminal 1 and the sheath We in the vicinity of the rear end of the sleeve 2 at the same position as them is prepared. For example, an inspection jig 100 is prepared in which a rectangular body made of a conductor (corresponding to the housing 1a of the shield terminal 1) is attached to a distal end of a rod body made of a conductor (corresponding to a shield wire), a first chuck probe 11 is in contact with both side surfaces of the rectangular body, and a second chuck probe 12 is in contact with an outer periphery of the rod body at a base of the rectangular body.
Then, the first chuck probe 11 and the second chuck probe 12 are in a closed state with respect to the inspection jig 100, and in this state, the computer 50 inspects whether or not there is a conductive state between the first chuck probe 11 and the second chuck probe 12. When it is confirmed that the first and second chuck probes 11 and 12 are in a conductive state, it can be judged that the first and second chuck probes 11 and 12 are properly contacted with the target part. Therefore, it can be confirmed that the inspection apparatus is in a state of exhibiting normal performance.
As described above, in the performance diagnosis method, the performance diagnosis is performed using the inspection jig 100 (corresponding to a defective product) every predetermined time or every predetermined number of times. As a result, it can be easily confirmed whether the defective product (the product to which the first chuck probe 11 and the second chuck probe 12 are electrically connected) can be reliably determined as a defective product, and it can contribute to further improving the reliability of the inspection apparatus.
That is, in the case where the first chuck probes 11 are not reliably brought into contact with and electrically connected to the shield terminal 1 when the first chuck probes 11 are closed (for example, in the case where there is a gap between portions to be brought into contact with each other), or in the case where the second chuck probes 12 are not reliably brought into contact with and electrically connected to the braid-folded-back portion Wd1 as a defective product when the second chuck probes 12 are closed (similarly, in the case where there is a gap between portions to be brought into contact with each other), even if the product is actually a defective product (conductive product), the computer 50 may judge that the product is a non-defective product (non-conductive product). However, the performance diagnosis is performed at appropriate intervals (intervals that do not interfere with the normal inspection), so that in the case where a non-conforming product may be misjudged as a conforming product, the misjudgment can be found and handled at an early stage.
Here, features of the inspection device for inspecting the terminating portion of the shielded electric wire and the method for diagnosing the performance of the inspection device according to the embodiments of the present invention described above will be briefly summarized and listed in the following [1] to [4 ].
[1] An inspection device for a terminating portion of a shielded electric wire (W),
the terminal portion is provided at a front end portion of a shielded electric wire (W) including a wire core (W1), a braid (Wd) covering an outside of the wire core (W1), and a sheath (We) covering an outside of the braid,
the terminating portion includes a braid turned-back portion (Wd1) obtained by turning back an exposed portion of the braid (Wd) formed by removing a part of the sheath (We) having a predetermined length from a wire end to an outer periphery of a front end portion of a remaining portion of the sheath (We),
the braid folded-back portion (Wd1) is crimped and fixed by a braid crimping portion (1b) provided at the rear end of the shield terminal (1),
the inspection device is configured to inspect whether or not the size of the rear end of the braid turn-back portion (Wd1) of the terminating portion of the shielded electric wire (W) is within an appropriate range,
the inspection apparatus includes:
A first chuck probe (11) configured to be capable of being opened and closed, the first chuck probe being in contact with and electrically connected to the shield terminal (1) when the first chuck probe is in a closed state;
a second chuck probe (12) supported in a non-contact state with the first chuck probe (11), the second chuck probe (12) being in a non-contact state with respect to the braid folded-back portion (Wd1) when the size of the braid folded-back portion (Wd1) is within an appropriate range, the second chuck probe (12) being in a contact conductive state with respect to the protruding portion of the braid folded-back portion (Wd1) when the size of the braid folded-back portion (Wd1) is outside the appropriate range;
a self-diagnosis probe (13) supported in a conductive state with the second chuck probe (12), the self-diagnosis probe (13) being in a contact conductive state with the first chuck probe (11) when the first chuck probe (11) is in an open state, the self-diagnosis probe (13) being in a non-contact state with the first chuck probe (11) when the first chuck probe (11) is in a closed state; and
and a conductive state detection means (50) for detecting whether or not the first chuck probe (11) and the second chuck probe (12) are in a conductive state.
[2] The inspection device for a terminal portion of a shielded electric wire according to [1], further comprising a wire chuck (10), the wire chuck (10) being disposed at a rear side of the second chuck probe (12) and configured to be openable and closable, and the wire chuck (10) accommodating therein the shielded electric wire (W) when the wire chuck (10) is in an opened state, the wire chuck (10) holding the shielded electric wire (W) at a fixed position when the wire chuck (10) is in a closed state.
[3] The inspection device of a terminal portion of a shielded electric wire according to [1] or [2], wherein the terminal portion of the shielded electric wire (W) further includes an annular sleeve (2) attached to an outer periphery of a front end portion of a remaining portion of the sheath (We), wherein the braid folded-back portion (Wd1) is obtained by folding back an exposed portion of the braid (Wd) to cover an outer periphery of the sleeve (2), the braid folded-back portion (Wd1) is crimped and fixed by a braid crimping portion (1b) of the shielded terminal (1) while being interposed between the sleeve (2) and the braid crimping portion (1b) of the shielded terminal (1), and wherein the second chuck probe (12) is supported so as to contact the outer periphery of the sheath (We) at a position on and near a rear side of a rear end edge (2a) of the sleeve (2).
[4] A method for diagnosing performance of an inspection device of a terminated portion of a shielded electrical wire, the method comprising:
preparing an inspection jig (100) corresponding to a defective inspection target product as an inspection target product of the inspection apparatus for a terminating portion of a shielded electric wire according to any one of [1] to [3], the inspection jig (100) having an appearance shape imitating the inspection target product, the inspection jig (100) including a first portion contacting a first chuck probe (11) in a closed state and a second portion contacting a second chuck probe (12) in the closed state, the first portion and the second portion being set to a conductive state;
-bringing the first chuck probe (11) and the second chuck probe (12) in a closed state with respect to the inspection fixture (100); and
while the first chuck probe (11) and the second chuck probe (12) are in an off state, whether or not a conductive state is between the first chuck probe (11) and the second chuck probe (12) is checked by a conductive state detecting means (50) of the checking apparatus.
According to the inspection apparatus having the configuration of [1] described above, when the conductive state detecting means detects that the first chuck probe and the second chuck probe are in a non-conductive state in a state where the first chuck probe and the second chuck probe are in a closed state (i.e., a state where a chuck operation for inspection is performed), the inspection apparatus determines that the size of the rear end of the folded-back portion of the braid, which is an inspection target product, is within an appropriate range, and judges that the inspection target product is a good product (a good product). On the other hand, when the conductive state detecting means detects that the first chuck probe and the second chuck probe are in a conductive state, the inspection apparatus determines that the size of the rear end of the folded-back portion of the braid, which is an inspection target product, is out of an appropriate range, and judges that the inspection target product is a defective product (defective product). That is, it is checked whether the length of the rear end of the braid back-folded portion of the terminating portion of the shielded electric wire is greater than a specified length by the closing operation of the first chuck probe and the second chuck probe.
When the conductive state detecting means detects that the first chuck probe and the second chuck probe are in a conductive state in a state where the first chuck probe is turned on (i.e., in a state where the conduction check of the inspection target product is not performed), the inspection apparatus determines that a defect such as disconnection does not occur in the wiring system of the first chuck probe and the second chuck probe, and judges that the performance of the inspection apparatus is normal.
On the other hand, when the conductive state detecting means detects that the first chuck probe and the second chuck probe are in a non-conductive state while the first chuck probe and the second chuck probe are kept in a conductive relationship with each other via the self-diagnostic probe in a state where the first chuck probe is opened, the inspection apparatus determines that there is a possibility that a defect such as disconnection occurs in the wiring system of the first chuck probe and the second chuck probe and normal inspection cannot be performed, and judges that there is an abnormality in the performance of the inspection apparatus.
As described above, the self-diagnosis of the performance of the apparatus can be automatically performed in a state where the first chuck probe is turned on every time the normal conduction check is performed once. Therefore, even if the product is an unqualified product, the product can be prevented from being misjudged as a qualified product due to a failure in the inspection apparatus in advance, and the reliability of the inspection apparatus can be improved.
According to the inspection apparatus having the configuration of [2], the wire chuck is provided at the rear side of the second chuck probe so that the shield wire is stably held and the inspection is accurately performed.
According to the inspection device having the configuration of [3] described above, a product in which the braid Wd protrudes from the rear end edge of the sleeve can be regarded as a defective product, so that the length of the braid turn-back portion can be specified based on the position of the rear end edge of the sleeve.
According to the method for diagnosing the performance of the inspection apparatus having the configuration of [4] described above, the performance diagnosis using the inspection jig (corresponding to the defective product) is performed every predetermined time or every predetermined number of times, so that it can be confirmed (the first chuck probe and the second chuck probe are electrically connected to each other) whether the defective product (the product in which the first chuck probe and the second chuck probe are electrically connected) can be reliably determined as the defective product, and it can contribute to further improving the reliability of the inspection apparatus. That is, in the case where the first chuck probe is not reliably brought into contact with and electrically connected to the shield terminal when the first chuck probe is closed (for example, in the case where there is a gap between portions to be brought into contact with each other), or in the case where the second chuck probe is not reliably brought into contact with and electrically connected to the folded-back portion of the braid as a defective product when the second chuck probe is closed (similarly, in the case where there is a gap between portions to be brought into contact with each other), even if the product is actually a defective product (conductive product), the conductive state detecting device of the inspection apparatus may judge that the product is a non-defective product (non-conductive product). However, the performance diagnosis is performed at appropriate intervals (intervals that do not interfere with the normal inspection), so that in the case where a non-conforming product may be misjudged as a conforming product, the misjudgment can be found and handled at an early stage.
Claims (4)
1. An inspection device for a terminating portion of a shielded electric wire,
the terminating portion is provided at a front end portion of the shielded electric wire, the shielded electric wire including: a wire core; a braid covering the outside of the wire core; and a sheath covering an outer side of the braid,
the terminal portion includes a braid turned-back portion obtained by turning back an exposed portion of the braid, which is formed by removing a portion of the sheath having a predetermined length from a wire end, to an outer periphery of a front end portion of a remaining portion of the sheath,
the braid folded-back portion is crimped and fixed by a braid crimping portion provided at a rear end of the shield terminal,
the inspection device is configured to inspect whether or not a size of a rear end of the braid turn-back portion of the terminating portion of the shielded electric wire is within an appropriate range,
the inspection apparatus includes:
a first chuck probe configured to be capable of being opened and closed, the first chuck probe being in contact with and electrically connected to the shield terminal when the first chuck probe is in a closed state;
a second chuck probe supported in a non-contact state with the first chuck probe, the second chuck probe being in a non-contact state with respect to the braid folded-back portion when the dimension of the braid folded-back portion is within the appropriate range, the second chuck probe being in a contact conductive state with respect to a protruding portion of the braid folded-back portion when the dimension of the braid folded-back portion exceeds the appropriate range;
A self-diagnosis probe supported in a state of being electrically conductive with the second chuck probe, the self-diagnosis probe being in a contact conductive state with the first chuck probe when the first chuck probe is in an open state, and being in a non-contact state with the first chuck probe when the first chuck probe is in a closed state; and
a conductive state detection device for detecting whether the first chuck probe and the second chuck probe are in a conductive state therebetween.
2. The inspection device for a terminating portion of a shielded electric wire according to claim 1, further comprising:
a wire chuck disposed at a rear side of the second chuck probe and configured to be openable and closable, and to accommodate the shielded wire therein when the wire chuck is in an open state, and to hold the shielded wire at a fixed position when the wire chuck is in a closed state.
3. The inspection device for a terminated portion of a shielded electric wire according to claim 1 or 2,
wherein the terminating portion of the shielded electric wire further comprises an annular sleeve attached to an outer periphery of the leading end portion of the remaining portion of the sheath,
Wherein the braid folded-back portion is obtained by folding back the exposed portion of the braid so as to cover an outer periphery of the sleeve, the braid folded-back portion is crimped and fixed by the braid crimping portion of the shield terminal while being interposed between the sleeve and the braid crimping portion of the shield terminal, and
wherein the second chuck probe is supported to contact the outer periphery of the sheath at a position rearward and near a rear end edge of the sleeve.
4. A method for diagnosing performance of an inspection apparatus for a terminating portion of a shielded electrical wire, the method comprising:
preparing an inspection jig corresponding to a defective inspection target product as an inspection target product of the inspection apparatus for a terminating portion of a shielded electric wire according to any one of claims 1 to 3, the inspection jig having an appearance shape imitating the inspection target product, the inspection jig including a first portion contacting the first chuck probe in a closed state and a second portion contacting the second chuck probe in a closed state, the first portion and the second portion being set to a conductive state;
Placing the first and second chuck probes in a closed state relative to the inspection fixture; and
checking whether or not there is a conductive state between the first chuck probe and the second chuck probe by the conductive state detecting means of the checking apparatus while the first chuck probe and the second chuck probe are in an off state.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-062989 | 2020-03-31 | ||
| JP2020062989A JP7051927B2 (en) | 2020-03-31 | 2020-03-31 | Inspection device for terminal processing unit of shielded wire and functional diagnosis method for the inspection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113465486A true CN113465486A (en) | 2021-10-01 |
| CN113465486B CN113465486B (en) | 2023-04-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110346937.4A Active CN113465486B (en) | 2020-03-31 | 2021-03-31 | Inspection device for inspecting terminal portion of shielded electric wire and method for diagnosing performance thereof |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7051927B2 (en) |
| CN (1) | CN113465486B (en) |
| PT (1) | PT117142A (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH087944A (en) * | 1994-06-20 | 1996-01-12 | Yazaki Corp | End section processing cap for shielded cable, and wire harness emplying the cap, and its conduction inspection method |
| CA2762156A1 (en) * | 1999-10-01 | 2001-04-12 | Sd3, Llc | Safety systems for power equipment |
| JP2001176635A (en) * | 1999-12-21 | 2001-06-29 | Yazaki Corp | Testing method and testing device for inserted terminal in automatic terminal insertor |
| JP2002238125A (en) * | 2001-02-09 | 2002-08-23 | Yazaki Corp | Device and method for shifting part on cable |
| JP2004014442A (en) * | 2002-06-11 | 2004-01-15 | Tsudakoma Corp | Coating-peeling terminal crimping device |
| JP2005045896A (en) * | 2003-07-25 | 2005-02-17 | Fujikura Ltd | Method and apparatus for detecting grounding failure in shielding conductor of power cable |
| JP2006032085A (en) * | 2004-07-15 | 2006-02-02 | Fujikura Ltd | Electrostatic capacity type proximity sensor |
| JP2006054286A (en) * | 2004-08-11 | 2006-02-23 | Seiko Epson Corp | Vacuum chuck jig, vacuum chuck method, and manufacturing method of liquid-droplet discharging head |
| CN101442219A (en) * | 2008-12-16 | 2009-05-27 | 深圳科安达电子科技股份有限公司 | Remote control earth wire automatic disconnection apparatus |
| JP2011138865A (en) * | 2009-12-28 | 2011-07-14 | Micronics Japan Co Ltd | Inspection apparatus of semiconductor device |
| WO2013042467A1 (en) * | 2011-09-22 | 2013-03-28 | 東京エレクトロン株式会社 | Probe apparatus |
| US20180131293A1 (en) * | 2016-11-04 | 2018-05-10 | Advanced Ion Beam Technology, Inc. | Apparatus and method for monitoring the relative relationship between the wafer and the chuck |
| CN208140807U (en) * | 2018-02-11 | 2018-11-23 | 乌鲁木齐智源易通智能科技有限公司 | Charging pile electrostatic testing apparatus |
| RU2693884C1 (en) * | 2018-07-31 | 2019-07-05 | Войсковая часть 13991 | Device for control and switching of circuits ira (measuring relay apparatus) |
| JP2019176080A (en) * | 2018-03-29 | 2019-10-10 | 株式会社東京精密 | Conduction inspection device, prober, and static eliminator |
| JP2019219360A (en) * | 2018-06-22 | 2019-12-26 | 古河電気工業株式会社 | Inspection device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6033064A (en) * | 1983-08-01 | 1985-02-20 | Ibiden Co Ltd | Method and device for inspecting pattern of printed wiring board |
| JP2593407Y2 (en) * | 1992-12-25 | 1999-04-12 | 日本エー・エム・ピー株式会社 | Inspection device |
| JP3565303B2 (en) * | 1996-11-05 | 2004-09-15 | 日本特殊陶業株式会社 | Jig, measuring device and measuring method for electrical characteristics between terminals of wiring board |
-
2020
- 2020-03-31 JP JP2020062989A patent/JP7051927B2/en active Active
-
2021
- 2021-03-24 PT PT117142A patent/PT117142A/en unknown
- 2021-03-31 CN CN202110346937.4A patent/CN113465486B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH087944A (en) * | 1994-06-20 | 1996-01-12 | Yazaki Corp | End section processing cap for shielded cable, and wire harness emplying the cap, and its conduction inspection method |
| CA2762156A1 (en) * | 1999-10-01 | 2001-04-12 | Sd3, Llc | Safety systems for power equipment |
| JP2001176635A (en) * | 1999-12-21 | 2001-06-29 | Yazaki Corp | Testing method and testing device for inserted terminal in automatic terminal insertor |
| JP2002238125A (en) * | 2001-02-09 | 2002-08-23 | Yazaki Corp | Device and method for shifting part on cable |
| JP2004014442A (en) * | 2002-06-11 | 2004-01-15 | Tsudakoma Corp | Coating-peeling terminal crimping device |
| JP2005045896A (en) * | 2003-07-25 | 2005-02-17 | Fujikura Ltd | Method and apparatus for detecting grounding failure in shielding conductor of power cable |
| JP2006032085A (en) * | 2004-07-15 | 2006-02-02 | Fujikura Ltd | Electrostatic capacity type proximity sensor |
| JP2006054286A (en) * | 2004-08-11 | 2006-02-23 | Seiko Epson Corp | Vacuum chuck jig, vacuum chuck method, and manufacturing method of liquid-droplet discharging head |
| CN101442219A (en) * | 2008-12-16 | 2009-05-27 | 深圳科安达电子科技股份有限公司 | Remote control earth wire automatic disconnection apparatus |
| JP2011138865A (en) * | 2009-12-28 | 2011-07-14 | Micronics Japan Co Ltd | Inspection apparatus of semiconductor device |
| WO2013042467A1 (en) * | 2011-09-22 | 2013-03-28 | 東京エレクトロン株式会社 | Probe apparatus |
| US20180131293A1 (en) * | 2016-11-04 | 2018-05-10 | Advanced Ion Beam Technology, Inc. | Apparatus and method for monitoring the relative relationship between the wafer and the chuck |
| CN208140807U (en) * | 2018-02-11 | 2018-11-23 | 乌鲁木齐智源易通智能科技有限公司 | Charging pile electrostatic testing apparatus |
| JP2019176080A (en) * | 2018-03-29 | 2019-10-10 | 株式会社東京精密 | Conduction inspection device, prober, and static eliminator |
| JP2019219360A (en) * | 2018-06-22 | 2019-12-26 | 古河電気工業株式会社 | Inspection device |
| RU2693884C1 (en) * | 2018-07-31 | 2019-07-05 | Войсковая часть 13991 | Device for control and switching of circuits ira (measuring relay apparatus) |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7051927B2 (en) | 2022-04-11 |
| JP2021163593A (en) | 2021-10-11 |
| PT117142A (en) | 2021-09-30 |
| CN113465486B (en) | 2023-04-11 |
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