JPS61112908A - Inspection of defective crimp type terminal - Google Patents

Abstract

PURPOSE:To enable inspection with a single image pick up and image processing apparatus, by picking up a profile image at a crimped terminal using a plurality of fiber scope consisting of image guide and light guide, supplying an image signal to a camera and processing said signal. CONSTITUTION:An electric wire 34 is held at its end by a swing arm 28, cut and peeled of its cover with cutter and cover remover 24 and firstly, a crimp type terminal is attached on the end by an end-press 22. Similarly, a crimp type terminal is attached on the rear end of the wire 34 by a rear-end press 22'. A fiberscope 16 develops an image of crimped condition of the front end terminal (profile image) and that 16' picks up the image of the rear end. The image signal thus picked up is supplied to an image signal processing apparatus 18 and by these signals quality of the crimped terminals are identified. An inspection unit accommodates only a fine fiberscope and consequently, a profile image of the crimped terminal can be picked up with better clarity with a high standard of workability and without any disturbance.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for inspecting crimped terminals for defects in a terminal crimping machine.

(Prior art) Before inspecting a terminal for poor crimping using a terminal crimping machine that crimps a crimped terminal onto a covered electric wire, an outline image of the crimped terminal is captured and the image signal thus obtained is processed. A method for determining the quality of crimping has been proposed (see Japanese Patent Laid-Open No. 42436/1983). However, when applying this inspection method to a double-end automatic terminal crimping machine, an imaging device such as a vidicon camera or an image sensor is required at both ends, and therefore two image processing devices are also required, resulting in high equipment costs. If you try to take an image by attaching an imaging device to a terminal crimping machine, the illumination device, imaging device, etc. will get in the way, making it difficult to work.In addition, since the imaging device, such as a camera, is large, it will not work in the same direction as the crimping direction of the terminal. It has the disadvantage that it is difficult to take an image from a right angle direction, making it impossible to obtain an accurate image signal.

- (Objective of the Invention) An object of the present invention is to provide a crimp terminal defect inspection method that requires only one imaging device and image processing device and that can obtain accurate image signals with high workability. .

(Structure of the Invention) The crimp terminal defect inspection method of the present invention uses a plurality of fiberscopes each including an image guide 1 or a light guide extending from a common camera and a light source to obtain an outline image of a crimped terminal using a tM. The method is characterized in that the image signal is supplied to the camera, and the image f4' (m) is processed to inspect the crimped terminal for defects.

According to this inspection method, images can be taken with high workability and accuracy using a small fiberscope.
Since only one imaging device and one image processing device are required per -, the equipment cost is low.

(Example) An example of the present invention will be described in detail with reference to the drawings. Fig. 1 shows an inspection apparatus used in the inspection method according to the present invention.
This inspection device 10 has one camera 12 and a light source 1.
Consisting of 4 and multiple 9 fiberscopes shown in the figure & example, 2 fiberscopes 16° 16", each fiberscope 1
6.16' is formed by image guides 16A, 16'A extending from the camera 12 and light guides 16B, 16'B extending from the light source 14, as shown in FIG. Camera 12 is connected to an image signal processing device 18 that processes image signals received from image guides 16A, 16'A. Note that the image guides 16A, 16''A and the light guides 16B, 16'E are both formed from fibers, and the image guide 16A.

16゛A has a lens traced at its tip.

Next, the inspection method of the present invention will be described with reference to FIG.
The wooden fiber scope 16.16゛ is attached to each tip press 22 of the double-end automatic terminal crimping machine 20 as shown in Fig. 3.
Then, the crimped state of the crimped terminal is imaged toward the end press 22'. In FIG. 3, reference numeral 24 is a cutter and peeler, IF 26 and 28 are a rotary chuck and swing arm, respectively, and 30 and 32 are a measuring roller and a pinch roller. The electric wire 34 passes through a measuring roller 30 and a pinch roller 32, and its tip is gripped by the swing arm 28.

It is cut and peeled by a cutter and peeler 24, and first, a crimp terminal is removed from the tip by a tip press 22. Next, the rear end of the wire 34 is cut and stripped, and a crimp terminal is attached to the rear end by the terminal press 22'.

The fiberscope 16 checks the crimp state of the crimp terminal at the tip (
The fiber scope 16' images the crimped state (outline image) of the crimp terminal at the rear end. The image signals obtained in this way are supplied to the image signal processing device 18, and the quality of the crimped terminal is determined based on these image signals.

FIG. 4 shows another embodiment of the inspection device 10 used in the present invention, in which the light guides 16B and 16'B of each fiberscope 16.16'' are provided with an image guide 16A at the tip,
It is branched from 16'A. In this way, by tilting the illumination from the light guides 16B and 16''B, it is possible to more clearly capture the contour image of the crimped end 1≠ (Effects of the Invention) According to the present invention, as described below. In addition, since only a thin fiberscope can be inserted into the inspection section, the FF117-.1 is easy to work with and allows for clearer images of the outline of the crimp terminal without any hindrance. Since only a processing device is required, there is a practical benefit in that equipment costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of an inspection device used in the crimp terminal failure inspection method according to the present invention, Fig. 2 is an enlarged cross-sectional view of a fiber scope, and Fig. 3 is a state in which the method of the present invention is being carried out. Schematic diagram. FIG. 4 is a side view of another embodiment of the inspection device 10--
---1 inspection device, 12-----1 camera, 14--
--Light source, 16.16'---m-Fiber scope, 16A, 16'A---Image guide, 16B
, 16'B-1---Light guide, 18---1 Image signal processing device, 20---'-1 Both ends automatic terminal crimping machine. wkl Figure 7Δ 13m

Claims (1)

[Claims] A plurality of fiber scopes each comprising an image guide and a light guide extending from a common camera and a light source are used to capture an outline image of the crimped terminal, supplying an image signal to the camera, and processing the image signal. A crimp terminal defect inspection method characterized by inspecting a crimped terminal for defects.