JP2593407Y2 - Inspection device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention is applicable to, for example, processing a coaxial cable terminal used for computer wiring.
The present invention relates to an inspection device used to inspect the quality of this processing.

[0002]

2. Description of the Related Art A coaxial cable (shielded cable) is widely used as a cable used for computer wiring and the like in order to avoid the influence of noise. The terminal of the coaxial cable is subjected to terminal processing such as welding to a connector for connecting to another signal line.

FIGS. 4A and 4B are a perspective view and a sectional view showing a coaxial cable, respectively. The coaxial cable 10 includes a central conductor 11 that transmits an electric signal,
It comprises an inner dielectric 12 covering the periphery of the center conductor 11, a number of thin shield wires 13 spirally wound around the outer periphery of the inner dielectric 12, and an insulating sheath 14 covering the periphery of the shield wire 13. ing.

FIG. 5A is a partial sectional view showing a connector to which the coaxial cable shown in FIG. 4 is attached.
(B) is a perspective view showing a state where the terminal portion of the shield wire is folded back along the outer wall of the inner ferrule,
This connector has been proposed by the present applicant. The same reference numerals are used for the same elements as those shown in FIG. Inside the connector 20, a front end 20a of the connector 20 is provided.
The center contact 22 connected to the signal pin 21 inserted from the opening is welded to the center conductor 11 and arranged. In addition, the shield wire 1 is set at a position slightly retracted from the terminal side.
A metal inner ferrule 15 is crimped so as to cover the periphery of 3 and the terminal side of the insulating outer cover 14, and the terminal portion 13 a of the shielded wire 13 is folded along the outer wall of the inner ferrule 15. The outer ferrule 24 covering the folded terminal portion 13a is crimped from the outside, and the coaxial cable 10 is fixed to the connector 20. As described above, the inner ferrule 15 is in direct contact with the shield wire 13, and the shield wire 13 is connected via the outer ferrule 24 to an outer conductor of a connector (not shown) to which the signal pin 21 is attached. You. If the return of the shield wire 13 is insufficient,
The shielded wire 13 comes into contact with the center conductor 11 to cause a product defect. For this reason, after the step of folding back the terminal portion 13a of the shielded wire 13 along the outer wall of the inner ferrule 15, an inspection is performed to determine whether or not the terminal portion 13a has been completely folded. Conventionally, this inspection is performed visually. Was being done.

[0005]

If the inspection of the folded portion of the end portion of the shielded wire is performed by visual inspection as in the prior art, since each of the shielded wires is thin, insufficient folding is overlooked. There is a problem that there is. If the shield wire is not folded sufficiently, as described above, a product defect occurs due to the shield wire contacting the center conductor or the like.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide an inspection apparatus that reliably and automatically inspects whether or not a terminal portion of a shielded wire is folded.

[0007]

According to the present invention, there is provided an inspection apparatus, comprising: a center conductor for transmitting an electric signal; an inner dielectric covering the center conductor; and a periphery of the inner dielectric. A shield wire covering the periphery of the shield wire except for the terminal side, and an inner ferrule covering the periphery of the shield wire at a position slightly receded from the terminal side, and a terminal of the internal dielectric. A coaxial cable in which a terminal portion of the shield wire is folded along the outer wall of the inner ferrule so that a portion is exposed,
An inspection device for inspecting whether or not the shield wire is folded, comprising: a pair of first electrodes formed with a groove for sandwiching the exposed inner dielectric; a second electrode contacting the inner ferrule; An inspection unit for inspecting the presence or absence of conduction between the first electrode and the second electrode is provided.

[0008]

When the terminal portion of the shield wire is folded along the outer wall of the inner ferrule, the shield wire does not contact the first electrode sandwiching the inner dielectric, and the second electrode passes through the inner ferrule. Contact with shielded wire or directly with shielded wire. As a result, the first electrode and the second electrode
Since there is no continuity between the electrode and the electrode, the return of the shield wire is determined to be "good" in the inspection section.

However, if at least one of the shield wires is insufficiently folded or at least one of the shield wires is not folded, the shield wire may not be folded when the first electrode sandwiches the internal dielectric. While contacting one electrode, the second
The electrode is always in contact with the shield wire. As a result, there is continuity between the first electrode and the second electrode, and the return of the shield wire is determined as “No” in the inspection unit.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an inspection apparatus according to the present invention; First, with reference to FIG. 1, a description will be given of a process until a terminal treatment is performed on the terminal side of the coaxial cable and the shield wire is folded back along the outer wall of the inner ferrule. FIGS. 1A to 1F are perspective views showing the outline of this step in order. The same components as those shown in FIGS. 4 and 5 are denoted by the same reference numerals.

A coaxial cable 1 is provided by a well-known terminal processing device.
The center conductor 11 and the shield wire 13 on the terminal side of the terminal 0 are exposed (FIGS. 1A and 1B). Next, as shown in FIG. 1C, the periphery of the exposed shield wire 13 and the insulating sheath 14 are located at a position slightly receded from the terminal side of the shield wire 13.
A metal inner ferrule 15 that covers the terminal side is pressed. Next, as shown in FIG.
A pair of brushes 31a, 31b swinging in the direction indicated by.
The exposed shield wire 13 is pinched by the brush 31
The twist of the shield wire 13 is returned by the rotation of the a and 31b in the directions indicated by the arrows B and C, respectively, and the wires are aligned. Then
As shown in FIG. 1 (e), a pair of brushes 32a and 32b swinging in a direction indicated by an arrow D sandwiches the shielded wires 13 arranged in a line, and the brushes 32a and 32b respectively have arrows E and F respectively. The shield wire 13 rises by the rotation in the direction indicated by. This operation is performed while the center conductor 11 is held by the clamp 34 and the brushes 32a, 32b
Is performed while swinging from side to side. Therefore, the way in which the brushes 32a and 32b enter the coaxial cable 10 changes,
The lower shield wire of the coaxial cable 10 is a brush 32a,
One of the brushes 32b is extruded in the lateral direction, and the other brush is reliably started up. Also,
When the number of shield wires is large, this brushing is repeated a plurality of times. Next, as shown in FIG. 1 (f), the raised shield wire 13 a is moved to the outer wall of the inner ferrule 15 by the brush 33 moving from the coaxial cable terminal side toward the cable origin (the direction of arrow G). Folded along. This work is performed by the center conductor 11
Is held by the clamp 34 while the shield wire of insufficient startup is raised by air blow from the nozzle 35.

In this way, the shield wire 13 is folded back along the outer wall of the inner ferrule 15, but if the return is insufficient, the shield wire 13 will become
The contact with the device causes a product defect. Next, FIG. 2 shows an outline of an inspection process for inspecting whether the shield wire is folded or not and a process after the inspection.

In the step shown in FIG. 1, the shield wire 13 is folded back along the outer wall of the inner ferrule 15, and then the process proceeds to the step shown in FIG. In this step, first, the inspection apparatus 40 inspects whether the shield wire is folded or not. If the return of the shield wire is determined to be “good” by the inspection device 40, the coaxial cable 10 is transferred to the holder 60 in the next step by the transfer device 50, and welding to the connector, crimping of the outer ferrule, and the like are performed. It is performed sequentially to obtain a finished product (see FIG. 5).

When the inspection device 40 determines that the return of the shielded wire is “No”, the coaxial cable is transferred to the cutter 70 by the holder 44 on the endless belt 35, and the coaxial cable is transferred by the cutter 70. After the terminal side is cut off, it is discharged from the production line. Note that a defective coaxial cable is also detected in a process before the inspection process of the return by the inspection device 40, and the terminal of the defective coaxial cable detected in the defective product detection process is also cut by the cutter 70. And
After the terminal side is cut, it is discharged from the production line at a position 71.

Referring to FIG. 3, a description will be given of an inspection apparatus for inspecting whether the shield wire is folded or not. The inspection device 40 includes a pair of first electrodes 41a and 41b and a pair of second electrodes 42a and 42b.
An inspection unit (not shown) for inspecting the presence or absence of conduction between the first electrodes 41a and 41b and the second electrodes 42a and 42b is also provided.
The first electrodes 41a, 41b and the second electrodes 42a, 42b
Is formed with a groove 45 (see FIG. 2) for sandwiching the coaxial cable. The first electrodes 41a, 41b and the second electrodes 42a, 42b can be moved in the vertical direction in the figure by a cylinder 43 (see FIG. 2), and the coaxial cable 10 held by the holder 44 (see FIG. 2) It is sandwiched from above and below by the groove 45. The first electrodes 41a and 41b are arranged at a position where the distance L from the folded end 13b of the shield wire 13 is 0.3 to 1 mm, and the first electrodes 41a and 41b sandwich the exposed internal dielectric 12. On the other hand, the second electrodes 42a, 42
b sandwiches the inner ferrule 15 and contacts the inner ferrule 15. The inner surface of the inner ferrule 15 is in contact with the shield wire 13, and if there is a shield wire 13 c that is insufficiently folded, the shield wire 13 c contacts the first electrode. Thereby, the inspection unit (not shown)
Now, the first electrodes 41a and 41b and the second electrodes 42a and 42b
And a signal generated by the conduction is sent to a controller (not shown). In this controller, the coaxial cable 10 that has been inspected as having an insufficiently folded shield wire is transferred to the cutter 70 by the holder 44 (see FIG. 2), and the end of the transferred coaxial cable 10 is cut and then manufactured. Control for discharging from the line is performed. In this way, a coaxial cable which becomes defective due to insufficient folding of the shield wire is surely automatically inspected by the inspection device and discharged from the production line.

[0016]

As described above, according to the present invention, the quality of the return of the shield line is checked by checking the conduction between the first electrode and the second electrode. Is reliably and automatically inspected, and occurrence of defective products due to insufficient folding of the shield wire can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view sequentially showing an outline of a process until a front end portion of a shield wire is folded over an outer periphery of an inner ferrule.

FIG. 2 is a perspective view schematically showing an inspection process for inspecting whether or not the folded back of the shield wire is good and a process after the inspection.

FIG. 3 is a partial cross-sectional view showing a schematic configuration of an inspection device.

FIG. 4A is a perspective view showing a coaxial cable, and FIG.
Is a sectional view.

FIG. 5A is a partial cross-sectional view showing a connector to which a coaxial cable is attached, and FIG. 5B is a perspective view showing a state where a front end portion of a shield wire is folded over the outer periphery of an inner ferrule.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Coaxial cable 11 Center conductor 12 Inner dielectric 13 Shield wire 14 Insulation sheath 15 Inner ferrule 41a, 41b First electrode 42a, 42b Second electrode

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-87112 (JP, A) JP-A-4-366574 (JP, A) JP-A-5-45962 (JP, U) JP-A-4-87962 60482 (JP, U) (58) Fields studied (Int. Cl. ⁶ , DB name) H01R 43/00 G01R 31/02-31/06 H01R 17/04 H01R 43/28 H01B 1/12 309 H01B 11 / 18 H02G 1/14-1/16

Claims (1)

(57) [Scope of request for utility model registration] 1. A central conductor for transmitting an electric signal, an internal dielectric covering the periphery of the central conductor, a shield wire covering the periphery of the internal dielectric, and covering the periphery of the shield wire except for a terminal side. An insulating outer cover, and an inner ferrule that covers the periphery of the shield wire at a position slightly receded from the terminal side, wherein a terminal portion of the shield wire is an outer wall of the inner ferrule so that a terminal portion of the inner dielectric is exposed. An inspection device for inspecting the return of the shielded wire of the coaxial cable folded along the pair of first electrodes having a groove for holding the exposed internal dielectric; An inspection apparatus comprising: a second electrode that comes into contact with the inner ferrule; and an inspection unit that inspects whether there is conduction between the first electrode and the second electrode.