JPS60170744A - Terminal crimping condition inspection device for terminal crimped wires - Google Patents

Abstract

PURPOSE:To perform secure inspection, simplify the constitution of the inspecting device, and inspect an electric wire terminal in movement by utilizing transmission type lighting. CONSTITUTION:The length l1 from the reference position of the electric wire, e.g. electric wire clamping position to a covering peeled position is measured after the electric wire covering is peeled off and before a terminal is crimped, and the length l2 from said reference position of the electric wire to the end of the crimped terminal is measured after the terminal is crimped. Those measurements are taken by a projecting means and a photodetecting means which are provided at both sides of the supply and sending-out paths of the electric wire to the terminal crimping machine across the electric wire, and an image recognizing means. The excessive length L of the covering part which is not clamped by the grip part of the terminal is operated from (L=l1-l2-D), where D is the length of each part of the terminal. Then it is decided whether L is within a permissible range or not.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application) The present invention relates to an improvement in a device for determining the quality of terminal crimping of a wire end formed by peeling off the covering of the end of a covered wire and crimping a 1-1 terminal. .

(Prior art) When a terminal is crimped to the end of a covered wire, the covering of the end of the covered wire is cut to a certain length, and the coating is peeled off by a certain length.
A terminal of a certain shape and size is crimped onto the end of the electric wire. For example, as shown in FIG. The second gripping portion Tb
It is necessary to firmly grip the conductor part wb all around the circumference and crimp it. However, if the first gripping part Ta grips the conductor part wb or the second gripping part Tb grips the covering part Wa.
In some cases, the first gripping portion Ta may not securely grip the covering portion Wa and may be crimped. Judging the quality of terminal crimping by visual inspection is cumbersome and inaccurate, and requires a lot of manpower to keep up with the speed of automated terminal punching machines. Automatic f-hi is installed. Also, from the pending applications of the same applicant as this invention, IF+ Publication No. 57-60249, Japanese Patent Application Publication No. 57-61903, Japanese Patent Application Publication No. 57-144474,
JP-A-57-175942, JP-A-58-95911
No. 58-135440 has been published. However, since these devices directly measure the length of the coating that is left ungrasped by the gripping section from the wire end to which the terminal has been crimped, the optical type measures the length of the coating that is left ungrasped by the gripping section. , the reflected light was received by a television camera or line sensor. Therefore, color identification is required, and the amount of reflected light fluctuates greatly even with slight changes in the position or orientation of the wire being inspected, making highly reliable inspection difficult and requiring complicated equipment. , it had become expensive. Therefore, even if the wire could be inspected stationary, it was not possible to inspect it while it was being moved, for example from the terminal punching machine to the wire delivery device.

(Purpose of the Invention) This invention was made by focusing on the problems of the prior art as described above, and utilizes transmissive illumination rather than reflective illumination such as an optical type. The purpose is to perform reliable inspection and to have a simple configuration. Furthermore,
If the electric wire to be inspected (y + ia end force) (facing the light emitting and light receiving means) is used to detect the electric wire and the C image is captured, the moving electric wire terminal can also be inspected. The purpose is to do so.

(Structure of the Invention) Structure of the Invention■ After peeling off the wire coating and before crimping the terminal, position the base ring of the electric wire 1, for example, measure the length from the wire clamping position to the position where the coating is peeled off, and after crimping the terminal, measure the length of the base ring of the electric wire 1, and after crimping the terminal, Measure the length from the reference position of the wire to the end of the crimped terminal.

(2) These measurements are performed using a light projecting means, a light receiving means, and an image recognition means, which are provided facing each other on both sides of the wire supply and delivery route to the terminal punching machine so as to sandwich the wire therebetween.

(2) The length of the covering portion that is left ungrasped by the gripping portion of the terminal is calculated indirectly from the required length determined as described above and the length of each part of the terminal, and it is determined that it is within the allowable range.

This is patented.

(Example) As a preferred example, implementation to a system wire grossener will be described with reference to the drawings. As shown in FIG. 2, a system wire grocer 1 according to the present invention is provided with a conveyor means 2 in the left and right direction for processing.
The electric wire W1 is configured to move intermittently to the left in the figure every pitch S. The conveyor means 2 is provided with clamping claws 2a that open and close left and right at every pitch S, and clamp the electric wire W1 to be processed in a direction perpendicular to the moving direction of the conveyor means 2. A wire stripper 3 is attached to the conveyor means 2, and cuts the coated wire wound on the reel 3a to a certain size, and
It is configured to peel off the coating on both ends thereof. The electric wire w1 to be processed thus processed is bent into a U-shape as shown in the figure, and both ends of the wire w1 are held between the holding claws 2a. A wire twisting machine 4 is attached downstream of the wire stripper 3, and a conveyor means 2
It is configured to twist the conductor portion of the electric wire W1 that is intermittently transferred. A terminal punching machine 5 is attached downstream of the wire twisting machine 4, and a continuous crimp terminal wound on a reel 5a is
The wires are configured to be automatically crimped one by one to the end portions of the transferred electric wires W1. Furthermore, a sorting means 6 is attached downstream of the terminal punching machine 5, which clamps the electric wire W1 with the clamping claws 6a of the terminal punch 5, and selectively rotates it either 90 degrees or 180 degrees in the poetic direction by a power (not shown). It is configured so that it can be done. All of the following are of publicly known configurations.

Next, a light emitting means and a light receiving means of the terminal crimping condition inspection device 7 according to the present invention are installed downstream of the wire stripper 4 and upstream of the terminal punching machine 5, and downstream of the terminal punching machine and upstream of the sorting means. It is attached. Each of these components controls the operation and timing of each component so that it operates during the stop time between the intermittent movements of the conveyor means 2.As shown in the figure, the first ♂Nν and A first television camera, which is a light receiving means, is attached to the conveyor means 2 downstream K of the wire twisting machine 4 so as to sandwich the ends of the electric wire w1 so as to sandwich the opposing ends thereof. The output of the first television camera 9a is sent to the first binarization circuit 10a,
The output of the second television camera 9b is sent to the second binarization circuit 10.
connected to b. The outputs of these binarization circuits 10a and 10b are connected to RAMII. The CPU 12 reads the image data from the RAMII, and executes a known image recognition means in the RAMI 1 to determine the length of the electric wire wl from the reference position to the coating stripping position and the length at the end 1 of the terminal T.
Configure with. That's right, the CPU 2 calculates the length of the covering length left ungrasped by the gripping part ja from the length of each part of the terminal T read out from the ROM 13 and the length data obtained by the image recognition means, and the calculation means calculates it. It also constitutes a comparison means for comparing the data read from the ROM 18 with the data within the permissible range. The ROM 1.9 stores programs for performing these image recognition, calculations, and comparisons, and also stores data on the length of each part of the terminal and the allowable range for L. RAMII,C
The PU 12, the ROM 13, and the control means C are connected by a system bus 14, and the control means C causes the light source to emit strobe light when the electric wire Wl comes to the inspection position, that is, the position where the light source and the television camera face each other, and displays still image data. R
The CPU 12 is caused to import the data into the AM, and gives a notification signal of completion of the import to the CPU 12. The defective CPU 12 gives a signal to the control means C indicating whether the length L of the electric current fm Wl is good or bad.

It is assumed that a terminal as shown in FIG. 1 is crimped onto an electric wire aWl by the system wire processor 1, and a process in which one end of the terminal is inspected will be described (see FIG. 6).

One end of the wire aWl, whose terminal coating is stripped off by the wire stripper 3 and the conductor portion wb is twisted together by the wire twisting machine, moves to position 1 in FIG. 3 in the form shown in FIG. 4(a).

The reference position 1 in FIG. 4 is, for example, the electric wire clamping position of the conveyor means 2. When the camera reaches the first position, the light source 8a emits light by the control means C, and the light is received by the television camera 9a. Then, the still image data binarized by the first binarization circuit is taken into the RAMII. This image data is as shown in FIG. 5(a). In response to the capture completion notification from the control means C, the CPU 12 reads this image data from the RAM II and calculates tl by known image recognition. The terminals are sequentially fed in the direction of the arrows, the terminals T are crimped by the terminal punching machine, and the terminals are transferred to the position (2) as shown in FIG. 4(b). When the control means C reaches the position 2, the light source 8b emits light, and the television camera 9b receives the light. Then, the still image data binarized by the second binarization circuit is taken into RAM II. This image data is as shown in FIG. 5(b), and is read out by the CPU 12 in response to a notification of completion of capture from the control means C, and tl is displayed.

When tl and tl are set, the data of the length D of the gripping portion Ta of the terminal T is read from the ROM 1.8 by the program, and from these data, the length of the kN portion Wa that is left ungrasped by the gripping portion Ta is determined. L is calculated. Furthermore, ROM1
．． 8 to the window T of the data δ and the terminal T.
Read the length W of w, compare it with L, and find δ<L<W
If it is -δ, it is determined to be good, and if it is other than this, it is determined to be defective. This good/bad judgment signal is given to the control means C, which controls the rotation angle of the sorting means 6 to 90 degrees], 8
It is used to determine whether it is 0 degrees or not. The products can be divided into four categories: good products and defective products. The above steps are sequentially performed in parallel with a delay of one terminal.

As described above, according to the present invention, instead of directly measuring the length of the sheathing part Wa that is left ungrasped by the gripping part Ta of the terminal from the electric wire to which the terminal has been crimped, Length of part Wa 1. , which is determined indirectly from the length tl of the wire after crimping, the length of each part of the terminal, etc., and since transmission type illumination is used, a sufficient light reception level can be obtained regardless of the color of the covering part Wa. Therefore, it is possible to reliably determine and inspect whether the terminal crimping condition is good or bad. There is no need to provide a condensing lens for light projection, and the configuration becomes simple.

(Other Examples) As shown in FIG. 7, since the terminal is dusty, it is difficult to distinguish between the ten-grip portion Ta and the covering portion Wa in the image data.
Take the length t3 from the reference position without taking the length tl, L = t
The length L of the covering portion left ungrasped by the gripping portion Ta can also be determined by the calculation l −t:(+tT D.

We have programmed various cases to understand that data on how to measure the length using image recognition means, the length that should be read from each part of the cable, and the allowable range differ depending on the type and size of the electric wire and the type and size of the terminal. By executing an appropriate program based on the above determination and selection by the control means C, the quality of the terminal crimping state can be inspected even in cases other than the above-mentioned embodiments.

In addition, the supply and delivery of the electric wire to the terminal punching machine does not depend on the conveyor, but in the case of a type 7, the supply and delivery route is When the same route is used, the light source and the television camera can be combined as one set.0 Furthermore, as mentioned above, in a device where the electric wire is supplied to the terminal puncher and sent out from there through the same route, Although there are some wires that cannot be stopped from moving, a center is installed that detects when the wire terminal to be inspected comes to a position facing the television camera and light source, and the light source emits a strobe light in synchronization with the output of the center to stop the wire from moving. If image data is taken in, the sensor can also be used to inspect the terminal crimping state of terminals that are in motion.

The effects of these other embodiments are also similar to those of the first series of implementations.

(Effects of the Invention) As described above, the present invention is capable of reliably inspecting the quality of the crimped state of the "f; It has a remarkable effect.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic diagram, FIG. 2 is a perspective view of the overall configuration, and FIG. 3 is a block diagram.
Figures 4 and 5 are schematic diagrams, Figure 6 is a flow diagram, and Figure 7 is a flow diagram.
The figure is a schematic diagram. In FIG. 2, 8a and 8b are light projecting means and 9a. 9b is a light receiving means, and in FIG.
, S3, S5, and S6 are image recognition means, S8 is a calculation means,
5IO1Sll is a means of comparison. Applicant ShinMaywa Industries Co., Ltd. (b) (o) No. 3 in Figure 5, Figure 71

Claims (7)

[Claims] (1) On both fills, on the path for supplying the electric wire with the terminal sheathing removed to the terminal punching machine, and on the path for sending out the electric wire with the terminal crimped to the electric wire terminal with the terminal coating peeled off from the terminal punching machine. A light emitting means and a light receiving means are provided facing each other so as to sandwich the electric wire, and the output of the light receiving means is connected to the input of an image recognition means, and the image recognition means outputs from the base yarn position of the electric wire to the coating peeling position. Connecting an output indicating the length in the case and an output indicating the length from the 11J base mulberry stand to the end of the crimped terminal to the input of the calculation means,
Data indicating the length of each part of the terminal is connected to the other input of this calculation means, and this calculation means outputs data indicating the length of the wire sheathing portion of the part left ungrasped by the wire gripping portion of the clasp. A terminal crimping state inspection device comprising: an output connected to an input of a comparing means, and data indicating an allowable range being connected to other inputs of the comparing means. (2) The length to the end of the crimped terminal is the length to the side end of the wire grip part of the terminal, and the length of each part of the terminal is the length of the wire grip part. Terminal crimping condition inspection device 0 described in scope 1 (3) The length of the crimped terminal at the end is the length to the end of the terminal that is not the wire gripping part, and the length of each part of the terminal is the total length of the terminal and the wire gripping part. The terminal crimping condition inspection device according to claim 1, wherein the terminal crimping condition inspection device has a length of . (4) The terminal crimping condition inspection device according to claim 1, wherein the light receiving means is a television camera. (5) The terminal crimping state inspection device according to claim 1, wherein the light receiving means is a line sensor. (6) The route for supplying the electric wire to the terminal punching machine is different from the route for sending out the electric wire from the terminal punching machine, and the light projecting means and the light receiving means are two sets of light projecting means and light receiving means. A terminal crimping state inspection device according to claim 1, comprising: (7) The route for supplying the electric wire to the terminal punching machine is the same as the route for sending out the electric wire from the terminal punching machine, and the light projecting means and the light receiving means are composed of a pair of light projecting means and light receiving means. A terminal crimping state inspection device according to claim 1.