JP3422228B2 - Intermediate tube detector for two-layer parts - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-layer component intermediate tube detecting device.

[0002]

2. Description of the Related Art Generally, in various industrial products, in particular, wire harnesses, subassemblies constituting wire harnesses (hereinafter collectively referred to as "wire assemblies"), etc., an outer circumference of a core material is covered with an intermediate tube, and Two-layer parts, in which the intermediate tube is covered with an outer tube, are often used.

For example, in a wire assembly, there is a wire assembly in which a heat-resistant corrugated tube is provided on the outer periphery of a wire bundle as a core material, and the outer periphery of the corrugated tube is covered with a varnish tube.

[0004]

In the case of a two-layer component having a two-layer structure and an intermediate tube, such as the wire assembly described above, the intermediate tube is completely covered by the outer tube, so that the appearance is not visible. I can't see it. Therefore, it was difficult to detect the presence or absence of the intermediate tube, and it was not possible to inspect the forgetting. In particular, in the case of high-mix low-volume production, it is difficult to manage since intermediate tubes are produced in a mixture of products that require and products that do not.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide an intermediate tube detecting device for a two-layer component capable of easily and surely detecting an intermediate tube covered with a two-layer structure. I am trying.

[0006]

In order to solve the above problems, the present invention provides a core material, an intermediate tube covering the outer circumference of the core material, and a flexible outer tube covering the outer circumference of the intermediate tube. An intermediate tube detection device for a two-layer component for inspecting a two-layer component having, a positioning portion for positioning the outer periphery of the two-layer component, provided so as to be able to come into contact with and separate from the positioned two-layer component, A presser for pressing the positioned two-layer component, and a discriminating unit for discriminating the presence or absence of the intermediate tube of the two-layered component based on the displacement amount of the presser It is an intermediate tube detection device.

In the invention including this specific matter, the outer tube is bent and deformed by positioning the two-layer component by the positioning portion and pressing it by the pressing element. At this time, by changing the way the outer tube is deformed depending on whether the intermediate tube is interposed or not,
Since the displacement amount of the presser is different, it is possible to detect the presence or absence of the intermediate tube without visually observing it by determining the difference in displacement amount by the determination unit.

Further, in a preferred mode, the pressing element and the discriminating portion are a plurality of sets arranged at intervals in the circumferential direction of the two-layer component. In the invention including this specific matter, if the two-layer component to be inspected is biased, all the switches cannot be connected.

[0009]

DETAILED DESCRIPTION OF THE INVENTION Referring to the accompanying drawings,
A preferred embodiment of the present invention will be described in detail. FIG. 1 is a schematic appearance view of an inspection drawing board adopting an intermediate tube detection device 10 for a two-layer component according to an embodiment of the present invention, and FIG. 2 is an intermediate tube detection for a two-layer component according to the embodiment of FIG. 2 is a perspective view of the device 10. FIG.

With reference to these drawings, the intermediate tube detection device 10 in the illustrated embodiment is arranged on an inspection drawing board 1 used in an inspection process of the wire assembly WA and is an inspection object. This is for inspecting the main line portion WR of the wire assembly WA. The wire assembly WA to be inspected has a wire bundle formed by bundling wires W as a core material, a heat-resistant corrugated tube C1 as an intermediate tube that covers the outer circumference of the wire bundle, and the heat-resistant corrugated tube C1. And a relatively flexible varnish tube C2, and includes a main line portion WR as a two-layer component. By forming several branch portions and connecting each with a connector C, a predetermined portion is formed. It is an electrical wiring system that constitutes a circuit.

As is well known, in the inspection process of the wire assembly WA, the wire assembly WA is installed on a work table called an inspection drawing board 1, and the inspection points of the installed wire assembly WA are important. Is inspected by a predetermined inspection tool (for example, the continuity inspection unit 20), so that the continuity of the wire assembly WA and the exterior parts are inspected. And the intermediate | middle tube detection apparatus 1 which concerns on embodiment of this invention
0 is one of such inspection tools and is provided on the inspection drawing board 1 to detect the presence or absence of the heat-resistant corrugated tube C1.

As shown in FIG. 2, the intermediate tube detecting device 10 includes a base block 11 as a positioning portion fixed to the inspection drawing board 1 and a plurality of inspection limit switches 12 attached to the base block 11. , 13 and. The base block 11 is a plate-shaped resin molded product as a whole, and an overhanging portion 11A is extended to the bottom thereof. The base block 11 is fixed at a fixed position on the inspection drawing board 1 by a pair of screws 14 penetrating the overhanging portion 11A, and is substantially orthogonal to the longitudinal direction of the wire assembly WA arranged on the inspection drawing board 1. The width direction extends in the direction. At the upper end of the base block 11,
A tenon-shaped shoulder portion 11B is formed. The end wall portion (thin portion) of the shoulder portion 11B is provided with a slit 11C as a positioning portion, the upper end of which opens in the center portion in the width direction, and the trunk portion WR of the wire assembly WA is mounted in the slit 11C. By doing so, positioning of the main line portion WR is performed.

The inspection limit switch 12 is symmetrically placed on the bottom surface 11D defined by the shoulder 11B, with the switch portions 12A as pressing elements facing each other. Here, both inspection limit switches 12 are fixed to the central portion in the width direction of the base block 11 with a space therebetween, so that the slits 11 are formed.
The main line portion WR introduced into C is allowed to be attached to the base block 11, while the other switch portion 12
The trunk line portion WR can be sandwiched between A and A. In the illustrated example, the switch unit 12A is
In each case, the contact portion is a roller, and by rolling contact with the varnish tube C2 of the main line portion WR, the frictional resistance at the time of insertion / removal can be reduced.

Further, the limit switch 13 is fitted in a housing groove 11E formed in the central portion of the bottom surface portion 11D of the base block 11, and the switch portion 13A is exposed upward. As described above, in the illustrated embodiment, since the plurality of limit switches 12 and 13 are arranged along the outer periphery of the main line portion WR to be inspected, when the main line portion WR is bent, As a result of one of the switches 12 and 13 being disconnected, erroneous output of the pass signal is prevented, and reliability is improved.

Each of the limit switches 12 and 13 is connected to a control device (not shown) for continuity inspection. The control device controls the wire assembly WA only when all the limit switches 12 and 13 are connected. It is programmed to judge that it is a good product. FIG. 3 is a schematic cross-sectional view showing a state at the time of inspection in the embodiment of FIG. 1, (A) shows a case of a regular product, and (B) shows a case where an intermediate tube is not attached.

First, referring to FIG. 3 (A), each of the limit switches 12 and 13 has the above-mentioned switch section 12 respectively.
When A and 13A and the switch parts 12A and 13A are pushed in, the operating piece 12B as a discriminating part operates.
13B and the switch portions 12A and 13A, the operation piece 12B,
Springs 12C and 13C for urging them away from 13B
The switch portions 12A and 13A are normally biased outward (in the diameter direction of the main line portion WR to be positioned in the figure) by the biasing forces of the springs 12C and 13C, while inside the slit 11C. When the main line portion WR is attached to the, the main line portion WR is pushed into the main line portion WR. Then, the limit switches for inspection 12 and 1
As shown in FIG. 3A, when the heat-resistant corrugated tube C1 is attached, the switch 3 is pushed down by a predetermined stroke so that the switch portions 12A and 13A are actuated by the operating piece 1.
2B and 13B are actuated so that the internal contacts can be connected (blocked at the b contact), while FIG.
As shown in (B), when the heat-resistant corrugated tube C1 is not attached, the switch parts 12A, 13A
The urging force of the springs 12C and 13C is set so that does not operate the operating pieces 12B and 13B.

In the above construction, the main line portion WR is positioned by the slit 11C and pressed by the switch portion 12A, whereby the varnish tube C2 is bent and deformed. At this time, the varnish is different between the case where the heat-resistant corrugated tube C1 is interposed as shown in FIG. 3A and the case where the heat-resistant corrugated tube C1 is not interposed as shown in FIG. 3B. Due to the difference in the deformation method of the tube C2,
Since the displacement amount of the switch portion 12A is different, the limit switches 12 and 13 are turned on in the normal case and turned off if the user forgets to attach them. This makes it possible to determine the difference between the displacement amounts of the switch sections 12A and 13A and detect the presence or absence of the heat-resistant corrugated tube C1 without visual inspection. Therefore, the above-described embodiment has a remarkable effect that the intermediate tube covered with the two-layer structure can be easily and reliably detected.

The above-described embodiments are merely examples of preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments. It goes without saying that various design changes can be made within the scope of the claims of the present invention.

[0019]

As described above, according to the present invention, the presence or absence of the intermediate tube can be detected without visual inspection, so that the intermediate tube covered with the two-layer structure can be easily and surely detected. There is a remarkable effect that can be done. In particular, in the case where a plurality of sets of the presser and the discriminating unit are arranged at intervals in the circumferential direction of the two-layer component, if the two-layer component to be inspected is biased, As a result of being unable to connect the switch, there is an advantage that erroneous output of the pass signal can be prevented and reliability can be improved.

[Brief description of drawings]

FIG. 1 is a schematic external view of an inspection board that employs an intermediate tube detection device for a two-layer component according to an embodiment of the present invention.

FIG. 2 is a perspective view of a two-layer component intermediate tube detection device according to the embodiment of FIG.

FIG. 3 is a schematic cross-sectional view showing a state at the time of inspection in the embodiment of FIG. 1, (A) showing a case of a regular product, and (B) showing a case where an intermediate tube is not attached.

[Explanation of symbols]

1 Inspection drawing board 10 Inspection device 11 base block 11C slit (positioning part) 12 Limit switch for inspection 12A switch (presser) 13 Limit switch for inspection 13A switch (presser) C1 heat resistant corrugated tube (intermediate tube) C2 varnish tube WA wire assembly WR trunk part (two-layer parts) W electric wire (core material)

Claims (2)

(57) [Claims] 1. An intermediate tube of a two-layer component for inspecting a two-layer component having a core material, an intermediate tube covering the outer periphery of the core material, and a flexible outer tube covering the outer periphery of the intermediate tube. A detection device, which is provided so as to come into contact with and separate from a positioning portion that positions the outer periphery of the two-layer component, and the positioned two-layer component,
A two-layer component characterized by comprising a presser for pressing the positioned two-layered component and a discriminating unit for discriminating the presence or absence of the intermediate tube of the two-layered component based on the displacement amount of the presser. Intermediate tube detector. 2. The intermediate tube detecting device for a two-layer component according to claim 1, wherein the pressing element and the discriminating portion are switches arranged in plural sets at intervals in the circumferential direction of the two-layer component. Intermediate tube detection device for layer parts.