JP2010061978A - Quality control structure of crimp terminal - Google Patents

Abstract

An object of the present invention is to provide a quality control structure of a crimping terminal capable of nondestructive inspection capable of managing quality while maintaining commercial value and capable of remarkably improving reliability in quality assurance.
At least a pair of wire barrels 2 for gripping the electric wiring 3 are provided, and end portions 2a of the pair of wire barrels 2 are wound around each other with their outer peripheral portions 2b overlapped to each other. In the quality control structure of the crimp terminal 1 for crimping and gripping, the winding portion where the electrical wiring 3 is gripped is observed from above, which is on the vertical extension line in the winding direction, and the pair of wire barrels 2 is observed. However, when the amount of wrapping A necessary for gripping the electric wiring 3 is obtained, the amount of wrapping of the wire barrel 2 is measured at a predetermined position in each of the outer peripheral portions 2b of the pair of wire barrels 2. For this purpose, a reference mark 4 is provided.
[Selection] Figure 1

Description

  The present invention relates to a crimp terminal quality control structure, and is particularly suitable for application to a crimp terminal quality control structure that can be inspected by nondestructive inspection without destroying the crimp terminal.

  In recent years, sufficient quality control is required in various technical fields. This quality control is not performed only on the final product, but also on the intermediate product in order to produce the final product with a high yield.

If the quality of the inspection object can be checked by non-destructive inspection, it is possible to check the quality of all the inspection objects to be mass-produced, but if not using destructive inspection, the quality should be checked. Some inspection objects cannot be used. For such inspection objects, a desired number of samples are randomly extracted for each lot to be produced, the quality of these samples is examined by destructive inspection, and the result is used as a representative value for the quality of the entire lot. The method is common.
Japanese Patent Laid-Open No. 7-161391 JP-A-11-101622

  By the way, as an inspection object whose quality is examined by destructive inspection, for example, a crimp terminal, particularly a crimp terminal such as an open barrel type is known (see, for example, Patent Documents 1 and 2). Here, an open barrel-type crimp terminal (hereinafter referred to as an open barrel-type crimp terminal) is a wire barrel that is provided at the end of shielded electrical wiring (electric wire) and grips the electric wire. The end portions of the pair of wire barrels are wound with the outer peripheral portions overlapped, whereby the wire barrel is caulked and the electric wiring is gripped in a crimped state.

  In inspecting the quality of this open barrel type crimp terminal, for example, at least three items of terminal crimp width (C / W), terminal crimp height (C / H), and barrel entrainment amount by observation of the crimping section Is generally inspected as the main quality control item.

  Among the quality control items, the former two items are investigated by automatic measurement by non-destructive inspection, but the latter is a cross-section of the entangled portion of the wire barrel that crimps and grips the wire. Therefore, it is necessary to inspect (destructive inspection) the product to be inspected by cutting the product in order to mainly check the amount of the wire barrel. Therefore, since the crimping terminal is cut during the crimping section observation, the crimping terminal to be inspected cannot be a product, and therefore it is difficult to perform the total measurement.

  Therefore, the present invention has been made in view of such problems, and provides a quality control structure of a crimp terminal capable of performing nondestructive inspection and managing quality while maintaining commercial value. The main purpose.

  One embodiment of the present invention for achieving the above object has at least a pair of wire barrels for gripping electrical wiring, and ends of the pair of wire barrels are wound by overlapping their outer peripheral portions. A quality control structure of a crimp terminal for crimping and gripping the electric wiring, wherein a winding portion where the electric wiring is gripped is observed from above, which is on a vertical extension line in the winding direction, and the pair of wires When the barrel obtains the amount of winding necessary for gripping the electrical wiring, a reference mark for measuring the amount of winding of the wire barrel is placed at a predetermined position in each outer peripheral portion of the pair of wire barrels. It was made to provide.

  Therefore, according to one aspect of the present invention, when the portion where the reference mark exists is the predetermined position when the entrainment portion where the electric wiring in the crimp terminal is gripped is observed from above, the pair It can be determined that the wire barrel secures the amount of winding necessary for gripping the electrical wiring. Thereby, the quality can be managed by avoiding the destructive inspection conventionally performed by cutting the product for cross-sectional observation and performing the non-destructive inspection. Therefore, since the commercial value of the crimp terminal can be maintained, the inspection object is randomly extracted as a desired number of samples for each lot to be inspected by the amount that can be inspected by nondestructive inspection. Compared with the conventional case where the quality of the entire lot is a representative value, the reliability in quality assurance can be significantly improved.

  Moreover, in one aspect of the present invention, the predetermined position at which the reference mark is provided secures an amount of entrainment necessary for the pair of wire barrels to grip the electrical wiring when observed from above. However, it is a position hidden by the winding of the pair of wire barrels. Thereby, when observing the entrainment site from above, it is necessary to ensure that the entrainment amount of the pair of wire barrels is sufficient for grasping the electric wiring by simply confirming that the reference mark is hidden. It can be easily ensured that it is secured.

  In one embodiment of the present invention, at least a pair of wire barrels for gripping the electrical wiring is provided, and ends of the pair of wire barrels are wound with the outer peripheral portions overlapped, respectively. The pair of wire barrels in the crimp terminal to be clamped and gripped is a quality control method for measuring the amount of entrainment for gripping the electrical wiring, and the pair of wire barrels is necessary for gripping the electrical wiring. When the winding amount is obtained, a reference mark for measuring the winding amount of the wire barrel is provided at a predetermined position in each of the outer peripheral portions of the pair of wire barrels, and the winding portion where the electric wiring is held Observation means for observing the reference mark from above, which is on the vertical extension line in the direction of entrainment. By Judging was to measure the entrainment amount.

  For this reason, according to one aspect of the present invention, if the portion where the reference mark is present is the predetermined position by the easy measurement of observing the entrainment portion where the electric wiring in the crimp terminal is held from above. It can be determined that the pair of wire barrels secures the amount of wrapping necessary for gripping the electrical wiring. Thereby, the quality can be managed by avoiding the destructive inspection conventionally performed by cutting the product for cross-sectional observation and performing the non-destructive inspection. Therefore, since the commercial value of the crimp terminal can be maintained, the inspection object is randomly extracted as a desired number of samples for each lot to be inspected by the amount that can be inspected by nondestructive inspection. Compared with the conventional case where the quality of the entire lot is a representative value, the reliability in quality assurance can be significantly improved.

  Furthermore, in one aspect of the present invention, the observation unit includes a laser device that irradiates a laser beam. The irradiation position of the laser beam emitted from the laser device to each of the reference marks, and each of the reference marks It is preferable to measure whether or not the distance from the position is within a predetermined range. Thereby, quality can be managed by mechanically automated inspection without judging the amount of entrainment by artificial visual inspection or the like. At this time, the amount of entrainment can be easily confirmed only by measuring whether or not the distance between the irradiation position of the laser beam irradiated to each reference mark and the position of each reference mark is within a predetermined range. Can be confirmed.

  According to the present invention, it is possible to provide a quality control structure of a crimp terminal that enables nondestructive inspection capable of managing quality while maintaining commercial value and can significantly improve reliability in guaranteeing quality. be able to.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a partial cross-sectional view showing a quality control structure of a crimp terminal according to an embodiment of the present invention. FIG. 1A is a schematic configuration diagram viewed from a cross-sectional direction, and FIG. It is the top view seen (namely, imaged with the imaging device).

  1 (a) and 1 (b), an open barrel-type crimp terminal 1 has at least a pair of wire barrels 2 and 2, and these wire barrels 2 and 2 respectively have ends 2a and 2a that are connected to each other. By caulking the portions 2b and 2b so as to overlap each other, for example, the shielded electrical wiring 3 (hereinafter simply referred to as the electric wire 3) is gripped in a crimped state.

  In particular, in the case of the present embodiment, when the winding amount A necessary for gripping the electric wire 3 is obtained in the outer peripheral portions 2b and 2b of the respective wire barrels 2 and 2, the entanglement site where the electric wire 3 is held is indicated. In order to measure the amount of entanglement of the wire barrels 2 and 2 at a position at a predetermined position in the outer peripheral portions 2b and 2b of the wire barrels 2 and 2 when observed from above, which is on the vertical extension line in the direction of the entanglement Inspection points 4 and 4 are provided as reference marks.

  Then, for example, the inspection points 4 and 4 reach a predetermined position by observing the entrainment site of the wire barrels 2 and 2 with an imaging device (camera 10 or the like) as observation means from the upper position described above. If so, it can be determined that the wire barrels 2 and 2 have secured the necessary amount of winding A for gripping the electric wire 3 described above.

  In general, in the inspection of the quality of such an open barrel crimp terminal 1, for example, the terminal crimp width C / W, the terminal crimp height C / H, and the wire barrels 2 and 2 are connected to the electric wire 3. It is known to inspect at least three items of the rolled-in amount A that are crimped as main quality control items. Of the quality control items, the former two items have been conventionally examined by non-destructive inspection by automatic measurement.

  Accordingly, if the inspection points 4 and 4 are provided on the outer peripheral portions 2b and 2b of the wire barrels 2 and 2 as in the present embodiment, the above-described inspection relating to the amount of entrainment A will also be described. Since quality can be controlled by non-destructive inspection by observation from above, it is possible to avoid the destructive inspection without cutting the cross-section and cutting the section, and maintain the commercial value of the crimp terminal. can do.

  Thus, since the entire open barrel type crimp terminal 1 can be inspected by nondestructive inspection, a desired number of samples are randomly extracted for each lot to be inspected, and the entire lot Compared to the conventional value which is a representative value of quality, reliability in quality assurance can be remarkably improved.

  As described above, according to the quality control structure of the open barrel type crimp terminal 1 of the present invention, the amount of wrapping required for gripping the electric wire 3 on the outer peripheral portions 2b and 2b of the wire barrels 2 and 2 is as follows. When A is obtained, when the entrainment site where the electric wire 3 is gripped is observed from above, which is on the vertical extension line in the entrainment direction, the predetermined positions on the outer peripheral portions 2b and 2b of the wire barrels 2 and 2 are The inspection points 4 and 4 which are reference marks for measuring the amount of winding of the wire barrels 2 and 2 are provided in the portion to be formed, and the winding portion of the wire barrels 2 and 2 is observed by the camera 10 from the above position. Thus, if the inspection points 4 and 4 have reached a predetermined position, it can be determined that the wire barrels 2 and 2 have secured the amount of winding A necessary for gripping the electric wire 3 described above. it can

  Therefore, since the quality can be controlled by the non-destructive inspection by the observation from above in the inspection of the item relating to the amount A of entrainment, the product of the crimp terminal can be obtained without cutting the section of the entrainment and observing the cross section. Since the value can be maintained, destructive inspection can be avoided, and all open-barrel crimp terminals 1 can be inspected by non-destructive inspection. The sex can be greatly improved.

[Other Examples]
The best mode for carrying out the present invention has been described above with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the scope of the present invention. And substitutions can be added.

  For example, FIG. 2 which attaches | subjects the same code | symbol to the corresponding part with FIG. 1 shows partially the quality control structure in the open barrel type | mold crimp terminal 1 as a crimp terminal in the other Example of this invention, (a ) Is a schematic configuration diagram viewed from a cross-sectional direction, and (b) is a top view viewed from above in (a). In the open barrel type crimp terminal 1 shown in FIG. 2, the open barrel type crimp terminal 1 of FIG. 1 described above is different except that the laser devices 11 and 11 are provided. Since the configuration is almost the same as that of the quality control structure, in the following description, detailed description of overlapping points will be omitted.

  In this case, as the quality control structure of the open barrel-type crimp terminal 1 shown in FIGS. 2A and 2B, laser devices 11 and 11 for irradiating laser light to positions on both sides of the camera 10 are provided. An interval P between the irradiation positions 12 and 12 of the laser beams 11a and 11a irradiated from the laser devices 11 and 11 to the inspection points 4 and 4 and the positions of the inspection points 4 and 4 , P is measured in a predetermined range.

  Thereby, the amount A of entrainment is confirmed by the interval between the irradiation positions 12 and 12 of the laser beams 11a and 11a irradiated to the inspection points 4 and 4 and the positions of the inspection points 4 and 4 respectively. It can be easily confirmed only by measuring whether P and P are within a predetermined range.

  In addition, the quality can be managed by mechanically automated inspection without artificial judgment, such as visually confirming the image captured by the camera 10 to confirm the amount of entrainment A. Also have.

  Moreover, FIG. 3 which attached | subjected the same code | symbol to the part corresponding to FIG. 1 (a) shows the quality control structure in the open barrel type crimp terminal 1 as a crimp terminal in the other Example of this invention partially in cross section. It is a schematic block diagram. In the quality control structure of the open barrel crimping terminal 1 shown in FIG. 3, the open barrel crimping of FIG. 1 described above except that the inspection points 5 and 5 as reference marks are provided at different positions. Since it is configured in substantially the same manner as the quality control structure in the terminal 1, in the following description, detailed description of overlapping points will be omitted.

  In this case, as the quality control structure of the open barrel type crimp terminal 1 shown in FIG. 3, when the inspection points 5 and 5 in the open barrel type crimp terminal 1 are observed from above, the necessary amount of winding A is set. While being secured, the wire barrels 2 and 2 are disposed at positions hidden by the winding.

  As a result, the amount of winding A of the pair of wire barrels 2 and 2 grips the electric wire 3 only by confirming that the inspection points 5 and 5 are hidden when the portion to be wound is observed from above. Therefore, there is an advantage that it can be easily ensured that the necessary and sufficient amount is secured.

  Moreover, in this case, by controlling the dimension B from each end 2a, 2a of the wire barrels 2, 2 to the position where the inspection points 5, 5 are disposed, the lower limit value management in the dimension B can be easily performed. It also has the advantage that it can be guaranteed.

  In the above-described embodiment, the case where an open barrel type crimp terminal is applied as the crimp terminal has been described. However, the present invention is not limited to this, and the main point is that the electric wire is caulked by winding the wire barrel. Various other types of crimp terminals can be widely applied as long as they are crimp terminals.

  The present invention is not limited to the quality control structure of the crimp terminal disposed in the electrical wiring of the automobile manufacturing industry, the automobile parts manufacturing industry, or the like. In short, the type of crimping the electrical wiring by caulking the wire barrel is involved. As long as the crimp terminal is used, it can be used in various other technical fields.

The quality control structure of the crimp terminal in one Example of this invention is partially shown with a cross section, (a) is a schematic block diagram seen from the cross-sectional direction, (b) is a top view seen from above in (a). It is. The quality control structure of the crimp terminal in the other Example of this invention is partially shown with a cross section, (a) is a schematic block diagram seen from the cross-sectional direction, (b) is the upper surface seen from the top in (a). FIG. It is a schematic block diagram which partially shows the quality control structure of the crimp terminal in the other Example of this invention in a cross section.

Explanation of symbols

1. Open barrel type crimp terminal (crimp terminal)
2 ... Wire barrel 2a ... End 2b ... Outer periphery 3 ... Electric wire (electrical wiring)
4, 5 ... Inspection points (reference mark)
10 ... Inspection camera (observation means)
11 ... Laser device 11a ... Laser beam 12 ... irradiation position

Claims (4)

The quality of the crimp terminal that has at least one pair of wire barrels for gripping the electrical wiring, and the ends of the pair of wire barrels are wound by overlapping the outer peripheral portions, respectively, so that the electrical wiring is crimped and gripped. A management structure,
Observe the entrainment site where the electrical wiring is gripped from above, which is on the vertical extension line in the entrainment direction,
When the pair of wire barrels obtains the amount of entrainment necessary for gripping the electrical wiring, in a portion that is a predetermined position in each outer peripheral portion of the pair of wire barrels,
A crimp terminal quality control structure characterized by providing a reference mark for measuring the amount of wire barrel winding. The predetermined position where the reference mark is provided is
When the pair of wire barrels are observed from above, the pair of wire barrels are positions hidden by the pair of wire barrels while securing the amount of winding necessary to grip the electric wiring. Item 6. A quality control structure of the crimp terminal according to Item 1. The crimp terminal has a pair of wire barrels for gripping the electrical wiring, and the ends of the pair of wire barrels are wound by overlapping the outer peripheral portions, respectively, so that the electrical wiring is crimped and gripped. A pair of wire barrels is a quality control method for measuring the amount of entrainment that grips the electrical wiring,
When the pair of wire barrels obtains the amount of winding necessary for gripping the electrical wiring, the amount of winding of the wire barrel is measured at a predetermined position in each outer peripheral portion of the pair of wire barrels. In addition to providing a reference mark for
An observing means for observing the entrainment site where the electrical wiring is gripped from above, which is on a vertical extension line in the entrainment direction;
The said observation means measures the said amount of entrainment by observing each said reference mark. The quality control method of the crimp terminal characterized by the above-mentioned. The observation means has a laser device for irradiating laser light,
4. The apparatus according to claim 3, wherein the distance between the irradiation position of the laser beam irradiated from the laser device to each of the reference marks and the position of each of the reference marks is measured within a predetermined range. 5. Quality control method for crimp terminals.

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