JP2014063611A - Connection structure and method for displaying crimp shape of the same - Google Patents

Abstract

The present invention provides a connecting structure capable of displaying a crimped shape inside the crimped portion in a crimped state that cannot be confirmed from the outside, and a method for displaying the crimped shape of the connection structure. With the goal.
An X-ray non-transmission part 51 that blocks X-rays transmitted through the pressure-bonding part 30 is provided inside the pressure-bonding part 30 in a pressure-bonded state. An X-ray irradiation process for irradiating X-rays toward the pressure-bonded portion 30 with respect to the pressure-bonded portion 30 in the pressure-bonded state in the connection structure 1 formed with a metal having a high density, and other portions by X-ray irradiation. And a display step of displaying the crimped shape inside the crimped part 30 in the crimped state based on the shape of the X-ray non-transmissive part 51 identified.
[Selection] Figure 1

Description

  According to the present invention, at least the conductor tip portion and the crimp portion of the crimp terminal in a coated electric wire provided with a conductor tip portion in which a conductor is coated with an insulation coating and the insulation coating on the tip side is peeled to expose the conductor. The present invention relates to a crimping shape display method for displaying the crimping shape of the crimping part in a crimped state in a connection structure that is crimped, and more specifically, a connection structure capable of displaying the crimping shape inside the crimping part, and The present invention relates to a crimping shape display method for displaying a crimping shape inside the crimping portion.

  The connection structure has a conductor covered with an insulating coating, and the insulating coating on the tip side is peeled off to expose the conductor to expose the conductor. Are constructed by crimping.

  When connecting the tip of the conductor and the crimp portion of the crimp terminal, in order to obtain a good conductive state with each other, it is necessary to properly crimp, and in order to confirm whether or not the crimp has been properly performed Various crimped shape inspection methods for inspecting the appearance of the crimped shape in the crimped state have been proposed.

For example, the “crimped terminal crimping state inspection method” disclosed in Patent Document 1 is one such crimped shape inspection method.
The “crimping state inspection method of the crimp terminal” disclosed in Patent Document 1 is an inspection method for inspecting the crimp state of the crimp terminal by image processing, and illumination lights having different hues on the crimp portion of the crimp terminal and the background thereof. This is an inspection method for inspecting the goodness and badness of the crimping portion by performing image processing on the image data of the crimping portion taken in the state of irradiating and detecting the position of the coated end portion of the electric wire in the crimping portion.

However, as described above, in the case of the crimping state inspection method for inspecting the appearance shape of the crimped part in the crimped state by an imaging means such as a camera or the visual inspection, it is a limit to confirm the crimped shape inside the crimped part in the crimped state. I have to say that there is.
Then, for example, the position and inclination of the conductor tip inside the crimping part, the biting condition that the barrel piece of the crimping part bites into the inside of the crimping part, and the presence or absence of a void remaining inside the crimping part, That is, it is possible to accurately and easily inspect whether or not the tip of the conductor and the crimped portion of the crimp terminal are crimped in an appropriate crimped state, including being crimped at an appropriate compression rate. There wasn't.

JP 2005-337926 A

  The present invention provides a connection structure capable of displaying a crimped shape inside the crimped part in a crimped state that cannot be confirmed from the outside of the crimped part, and a method for displaying the crimped shape of the connected structure. With the goal.

  In the present invention, a conductor is covered with an insulating coating, and the insulating coating on the tip side is peeled off, and at least the conductor tip and a crimping portion of a crimping terminal are crimped on a covered electric wire provided with a conductor tip exposed from the conductor. A crimping shape display method for displaying a crimped shape inside the crimped part in a crimped state in a connected connection structure, wherein X-rays shield X-rays transmitted through the crimped part inside the crimped part in a crimped state The X-ray non-transparent part is provided with a material having a density higher than that of the material of the pressure-bonding part, and the X-rays are directed from the outside of the pressure-bonded part in a pressure-bonded state toward the pressure-bonding part. Performing an X-ray irradiation step of irradiating and a display step of displaying a crimped shape inside the crimped portion in a crimped state based on the shape of the X-ray non-transmissive portion identified from other portions by X-ray irradiation. It is characterized by.

  As described above, by irradiating the X-rays toward the pressure-bonding part in the X-ray irradiation process, the shape of the X-ray non-transparent part in the pressure-bonding part can be distinguished from other parts in the display process. The internal shape of the crimping part in the crimped state can be displayed in a visualized state.

  Therefore, it can be confirmed accurately and easily whether the conductor tip portion and the crimp portion of the crimp terminal are properly crimped.

  For example, the product yield can be improved by adopting the above-described crimp shape display method for the inspection of the connection structure in which the conductor tip portion and the crimp portion of the crimp terminal are crimp-connected.

  Here, the crimping shape inside the crimping portion includes, for example, the position, orientation, and shape of the conductor tip, and further the biting shape of the barrel piece that bites into the crimping portion.

  It is not limited to the position, orientation, and shape of the conductor tip inside the crimping part, and includes, for example, the biting condition of the barrel piece that has bitten into the crimping part and the crimping condition of the crimping part. In addition, the crimping | compression-bonding degree of a crimping | compression-bonding part is a crimping | crimping condition regarding whether the crimping | compression-bonding part was crimped | compressed with the appropriate compression rate, and can confirm it based on the space which remains in the inside of a crimping | compression-bonding part.

Moreover, although an X-ray non-transmission part is mentioned later, you may provide separately from a conductor inside the said crimping | compression-bonding part, and you may form as conductor itself.
When provided separately from the conductor, it can be provided on at least one of the outside and the inside of the conductor. When formed as the conductor itself, a part or the whole of the conductor may be formed by an X-ray non-transparent portion.

  The X-ray non-transmission part transmits not only all of the X-rays transmitted through the crimping part, but also transmits a part of the irradiated X-rays if the X-ray non-transmission part blocks the inside of the crimping part to an extent that can be identified. Including cases. The X-ray non-transmissive portion is formed so as to have a transmittance that is lower than the transmittance that transmits at least the pressure-bonding portion with respect to the X-ray.

  The present invention is a method of manufacturing the connection structure used in the above-described crimp shape display method, wherein the crimp portion can be inserted from the proximal end side into the inside from the proximal end side, and the conductor distal end portion is It is the manufacturing method of the connection structure formed in the hollow shape which can be enclosed, It is characterized by the above-mentioned.

  According to the configuration described above, the crimping portion is configured as a so-called closed barrel crimping portion in which the cylindrical crimping portion is compressed before the crimping, for example.

  In such a closed barrel type crimping part, it is difficult to visually confirm the inner crimping shape from the outside particularly in the crimped state. However, as described above, by X-ray irradiation, By identifying the shape, even if it is difficult to visually confirm the inner crimping shape from the outside, the inner crimping shape of the crimping portion can be reliably confirmed.

  As an aspect of the present invention, an X-ray non-transparent portion arranging step is performed in which the crimp terminal is formed of a material having a density equal to or higher than the density of the conductor material, and the X-ray non-transparent portion is arranged inside the crimp portion before crimping. be able to.

  As described above, when the crimp terminal formed of a material having a density equal to or higher than the material density of the conductor is used, even if the X-ray is irradiated to such a crimp terminal, not only the crimp part but also the tip of the conductor The X-rays are transmitted through the part.

  However, as described above, by performing the X-ray non-transmission portion arranging step before the X-ray irradiation step, the X-ray non-transmission is placed inside the pressure-bonding portion before the pressure bonding in the X-ray irradiation step. Since the portion can be disposed, X-rays can be blocked by the X-ray non-transmissive portion during the X-ray irradiation step.

  Therefore, even if the crimp terminal formed of a material having a density equal to or higher than the density of the conductor material is used, the shape of the X-ray non-transparent portion inside the crimp portion is changed to another portion in the display process. Therefore, it is possible to confirm the crimping shape inside the crimping part that cannot be visually confirmed from the outside of the crimping part.

  Further, as an aspect of the present invention, the X-ray non-transparent portion is formed of a flowable X-ray non-transparent material having fluidity, and as the X-ray non-transparent portion arranging step, the flowable X-ray non-transparent material is An X-ray non-transparent material applying step applied to at least one of the surface of the conductor tip and the inside of the press-bonded portion before pressure bonding is performed, and the X-ray non-transmissive material applying step is performed on the pressure bonded portion before pressure bonding. This can be done before inserting the conductor tip into the inside.

  According to the configuration described above, the flowable X-ray non-transparent material has fluidity, so even if it is just before inserting the conductor tip into the inside of the crimping part before crimping, the fluidity. Since the flowable X-ray non-transparent material can be spread over the surface of the conductor tip only by applying the X-ray non-transparent material to the conductor tip, at least firmly with respect to the conductor tip. And it can arrange | position easily.

  Moreover, after the X-ray impermeable material application step, when the conductor tip is inserted into the crimping part before crimping, it flows into the gap between the crimping part before crimping and the conductor tip. X-ray non-transparent material can be distributed.

  The flowable X-ray non-transparent material is not particularly limited as long as it is a flowable X-ray non-transparent material, but it is preferably a gel. In particular, if it is a gel, the viscosity is not too low and it does not sag, so it can be easily applied to the conductor tip.

  Further, the flowable X-ray non-permeable material need not have flowability after the X-ray non-permeable material application step and may be solidified.

  If the X-ray non-transparent part is an X-ray non-transparent material having fluidity, for example, the X-ray non-transparent part may be formed of a carbon paste to which at least one kind of powder is added among molybdenum, gold, silver, lead, or tin. Yes, but not limited.

  In the X-ray non-transparent material applying step, for example, the flowable X-ray non-transparent material is applied by applying a flowable X-ray non-transparent material to the conductor tip or by immersing the conductor tip in the fluid X-ray non-transparent material. Can be applied to at least one of the surface of the conductor tip and the inside of the crimped part before crimping, but the means for imparting is not particularly limited.

  Further, as an aspect of the present invention, in the X-ray non-transparent material application step, the flowable X-ray non-transparent material can be filled in the pressure-bonding portion before pressure bonding.

  As described above, by filling the flowable X-ray non-transparent material inside the pressure-bonding part before pressure bonding, the inside of the pressure-bonded part before pressure bonding after the X-ray non-transparent material applying step. When inserting the conductor tip portion or crimping the crimp portion, it is possible to further spread the fluid X-ray non-transparent material in the gap portion between the crimp portion and the conductor tip portion before crimping. it can.

  Therefore, the crimping shape inside the crimping part can be displayed in a wider range.

  As an aspect of the present invention, the X-ray non-transparent portion is formed of an X-ray non-transparent member that can be attached to the conductor tip or the inside of the crimping portion, and the X-ray non-transparent portion arranging step The X-ray non-transparent member is attached to the surface of the conductor tip or the inside of the pressure-bonding part before being crimped, and the X-ray non-transmissive member is attached to the conductor tip. This can be done before inserting the part into the inside of the crimping part before crimping.

  As described above, by attaching the non-transparent member to the inside of the crimping part before crimping, the internal shape of the crimping part such as the biting of the barrel piece of the crimping part before crimping can be accurately displayed. Can do.

  Moreover, in the X-ray non-transparent member mounting step, the X-ray non-transparent member is melted rather than having fluidity by mounting the X-ray non-transparent member on the surface of the conductor tip or inside the press-bonded part before press-bonding. Since it is easy to handle without trouble and dripping, it can be easily disposed at the tip of the conductor.

  Further, as an aspect of the present invention, the crimping portion of the conductor tip portion in the crimping portion is set as a conductor crimping portion, and the conductor tip portion is inserted into the crimping portion before crimping before the crimping portion in the crimping portion. A sealing portion for sealing the tip end side can be formed on the tip end side of the conductor crimping portion.

  By forming a sealing part on the tip side of the conductor crimping part in the crimping part, the front side of the crimping part is sealed in the crimping state, and the crimping shape inside the crimping part is further increased outside. It will be impossible to see from.

  Thus, even when it is difficult to visually confirm the inner crimping shape from the outside of the crimping part, as described above, by performing the X-ray irradiation process, The internal crimping shape can be displayed securely.

  Furthermore, by forming the sealing portion, there may be a variation in the insertion position of the conductor tip with respect to the inside of the crimping portion due to the variation in the shape of the sealing portion for each crimping terminal. Although the necessity of confirming the crimping shape is increased, as described above, by performing the X-ray irradiation step, the crimping shape inside the crimping portion can be displayed firmly in the display step.

  As an aspect of the present invention, at least a part of the conductor tip portion can be formed by the X-ray non-transmissive portion.

  According to the above-described configuration, excellent integrity between the conductor tip portion and the X-ray non-transmissive portion can be ensured, and therefore the X-ray non-transmissive portion is separated from the conductor tip portion by pressure bonding. There is no fear, and the position of the conductor tip portion can be accurately displayed even in the crimped shape inside the crimped portion in the crimped state.

  As an aspect of the present invention, the conductor tip can be formed of an aluminum-based material, and the crimping portion can be formed of a copper-based material.

  As described above, when the conductor tip is formed of an aluminum-based material and the pressure-bonding portion is formed of a copper-based material, copper is a metal having a higher density than aluminum.

  For this reason, even if such a crimp terminal is irradiated with X-rays, the X-rays are transmitted not only through the crimp portion but also through the conductor tip.

  However, as described above, by performing the X-ray non-transparent portion arranging step before the X-ray irradiation step, the X arranged inside the crimping portion before the crimping in the X-ray irradiation step. The non-transparent part can block X-rays.

  Therefore, even if the crimp terminal formed of a material having a density equal to or higher than the density of the conductor material is used, the shape of the X-ray non-transparent portion inside the crimp portion is changed to another portion in the display process. Therefore, it is possible to confirm the crimping shape inside the crimping part that cannot be visually confirmed from the outside of the crimping part.

  In addition, when the conductor itself including the conductor tip is formed of an aluminum-based material, it can be reduced in weight as compared to a covered electric wire having a conductor portion made of copper wire, and so-called dissimilar metal corrosion (below) Can be prevented).

  The present invention also includes at least the conductor tip portion and the crimp portion of the crimp terminal in a coated electric wire provided with a conductor tip portion in which a conductor is covered with an insulation coating, and the insulation coating on the tip side is peeled to expose the conductor. A pressure-bonded connection structure, and an X-ray non-transparent portion that shields X-rays transmitted through the pressure-bonding portion inside the pressure-bonded portion in a pressure-bonded state. It is characterized by having a material having a density higher than that of the material.

  As an aspect of the present invention, the crimping portion can be formed in a hollow shape in which the distal end portion of the conductor can be inserted from the proximal end side to the inside and the distal end portion of the conductor can be surrounded.

  As an aspect of the present invention, in the connection structure including the crimp terminal formed of a material having a density equal to or higher than the density of the conductor material, the X-ray non-transparent portion may be disposed inside the crimp portion before the crimp. it can.

  Further, as an aspect of the present invention, the X-ray non-transparent portion is formed of a fluid X-ray non-transparent material having fluidity, and the fluid X-ray non-transparent material is crimped to the conductor tip portion. And can be interposed.

  As an aspect of the present invention, the X-ray non-transparent portion is formed of an X-ray non-transparent member that can be attached to the conductor tip or the inside of the crimping portion, and the X-ray non-transparent member is the conductor. It can interpose between a front-end | tip part and the said crimping | compression-bonding part of a crimped state.

  Also, as an aspect of the present invention, a crimping portion of the conductor tip portion in the crimping portion is set as a conductor crimping portion, and a sealing portion for sealing the tip side is provided on the tip side of the conductor crimping portion in the crimping portion. Can be formed.

  As an aspect of the present invention, at least a part of the conductor tip portion can be formed by the X-ray non-transmissive portion.

  As an aspect of the present invention, the conductor tip can be formed of an aluminum-based material, and the crimping portion can be formed of a copper-based material.

  According to this invention, it is possible to display the crimping shape inside the crimping part in a crimped state that cannot be confirmed from the outside of the crimping part.

Explanatory drawing of the crimp shape display method using the electric wire with a crimp terminal of 1st Embodiment. Explanatory drawing of the manufacturing method of the electric wire with a crimp terminal of 1st Embodiment. Explanatory drawing of the manufacturing method of the electric wire with a crimp terminal of 1st Embodiment. Explanatory drawing of a press-fit shape display apparatus. Explanatory drawing of the crimp shape display method using the electric wire with a crimp terminal of 1st Embodiment. Explanatory drawing of the crimp shape display method using the electric wire with a crimp terminal of 1st Embodiment. Explanatory drawing of the electric wire with a crimp terminal of 2nd Embodiment. Explanatory drawing of the electric wire with a crimp terminal of 3rd Embodiment. Explanatory drawing of the electric wire with a crimp terminal of 4th Embodiment. Explanatory drawing of the electric wire with a crimp terminal of 5th Embodiment. Explanatory drawing of the electric wire with a crimp terminal of 6th Embodiment. Explanatory drawing of the electric wire with a crimp terminal of other embodiments.

An embodiment of the present invention will be described in detail with reference to the drawings.
The crimping shape display method of the present embodiment is a method for displaying the crimping shape inside the crimped portion 30 in the crimped state in the crimped terminal-attached electric wire 1 so that it can be visually confirmed. From the outside of the crimping portion 30 toward the crimping portion 30 with respect to the crimping portion 30 in the crimped state of the electric wire with crimping terminal 1 provided with the X-ray non-transparent portion 51 that blocks the X-rays transmitted through the crimping portion 30. An X-ray irradiation process for irradiating X-rays, and a display process for displaying a crimped shape inside the crimped part 30 in a crimped state based on the shape of the X-ray non-transmissive part 51 identified from other parts by X-ray irradiation; It is a method to do.
First, the crimped terminal-attached electric wire 1 that is a target for confirming the crimped shape inside the crimped portion 30 in the crimped state by the crimped shape display method will be described below.

(First embodiment)
FIG. 1 is a perspective view of the wire tip portion 200a of the wire 1 with a crimp terminal according to the first embodiment and a rear portion thereof. Specifically, in order to confirm the crimp shape inside the crimp portion 30 in a crimped state, The state in which X-rays are emitted from at least the electric wire crimping portion 33 from the X-ray irradiation portion 92 is shown.

  As illustrated in FIG. 1, the electric wire 1 with a crimp terminal according to the present embodiment is configured by connecting a covered electric wire 200 to a female crimp terminal 10. That is, the wire crimping portion 32 of the female crimp terminal 10 is crimped and connected to the wire tip portion 200 a of the covered wire 200.

  Moreover, the electric wire 1 with a crimp terminal includes an X-ray non-transmissive portion 51 that blocks X-rays inside the crimp portion 30 in a crimped state. That is, the X-ray non-transparent portion 51 is interposed between the wire crimping portion 32 of the female crimp terminal 10 and the wire tip portion 200a.

The covered electric wire 200 to be crimped and connected to the female crimp terminal 10 is configured by covering a conductor 201 formed by bundling a plurality of aluminum core wires 201s with an insulating coating 202 made of an insulating resin.
The aluminum core wire 201s is formed by twisting an aluminum strand made of an aluminum alloy.

  The electric wire front end portion 200a is a portion in which the covered front end portion 202a and the conductor front end portion 201a are provided in series in this order toward the front end side in the front end portion of the covered electric wire 200.

  The conductor tip portion 201a is a portion where the insulating coating 202 on the front side of the covered electric wire 200 is peeled off to expose the aluminum core wire 201s. The covered tip portion 202 a is a tip portion of the covered electric wire 200, but is a portion on the rear side of the covered tip portion 202 a and is a portion in which the aluminum core wire 201 s is covered with the insulating coating 202.

  The X-ray non-transmissive portion 51 has an atomic number larger than that of copper, which is the main material of the crimping portion 30, and more precisely contains lead, which is a metal having higher density and higher conductivity than copper. Forming.

Hereinafter, the female crimp terminal 10 will be described in detail.
The female crimp terminal 10 includes a box portion 20 that permits insertion of an insertion tab in a male terminal (not shown) from the front, which is the distal end side in the longitudinal direction X, to the rear, which is the proximal end side. At the rear, it is integrally configured with a crimping portion 30 disposed via a transition portion 40 having a predetermined length.

  In the present embodiment, as described above, the female crimp terminal 10 including the box portion 20 and the crimp portion 30 is used. However, if the crimp terminal has the crimp portion 30, the female crimp terminal 10 described above is used. The male crimping terminal constituted by the insertion tab and the crimping part 30 to be inserted into and connected to the box part 20 in this case is constituted by only the crimping part 30 and is crimped for bundling and connecting the aluminum core wires 201s of the plurality of covered electric wires 200. It may be a terminal.

  Here, as shown in FIG. 1, the longitudinal direction X is a direction that coincides with the longitudinal direction of the electric wire with crimp terminal 1 in which the covered electric wire 200 is connected to the female crimp terminal 10. Further, the side of the box portion 20 with respect to the crimping portion 30 in the longitudinal direction X is defined as the front side (front end side), and conversely, the side of the crimping portion 30 with respect to the box portion 20 is defined as the rear side (base end side).

  The width direction Y corresponds to the width direction of the female crimp terminal 10 and intersects the longitudinal direction X in the plane direction. The thickness direction Z corresponds to the width direction of the female crimp terminal 10 and is an orthogonal direction orthogonal to the length direction and the width direction.

  The box portion 20 is formed of an inverted hollow rectangular column body, and is bent toward the rear in the longitudinal direction X and elastic contact pieces 21 that contact an insertion tab (not shown) of the male connector to be inserted. It has.

  In addition, the box portion 20 which is a hollow quadrangular prism body is bent so that side portions provided continuously on both side portions in the width direction Y orthogonal to the longitudinal direction X of the bottom surface portion are overlapped, and viewed from the front end side in the longitudinal direction X. It is configured in a substantially rectangular shape.

The crimping part 30 is integrally formed in a continuous shape that is continuous in the entire circumferential direction while the sealing part 31 and the wire crimping part 32 are arranged in this order from the front to the rear.
The sealing portion 31 has a flat shape in which the front end portion of the wire crimping portion 32 is deformed so as to be crushed into a substantially flat plate shape, and the plate-like terminal base materials 100 constituting the female crimp terminal 10 are superposed. It is composed.

In the electric wire crimping portion 32, the conductor crimping portion 33 and the covering crimping portion 34 are continuously arranged in series in this order from the front side to the rear side.
The wire crimping part 32 is hollow (cylindrical) in which only the rear side is open so that the wire tip part 200a can be inserted from the covering crimping part 34 to the conductor crimping part 33, and the tip side and the entire peripheral surface part are not opened. It consists of.

  The conductor crimping portion 33 is a portion corresponding to the conductor tip portion 201a in the longitudinal direction X of the wire crimping portion 32 in a state where the wire tip portion 200a is inserted into the wire crimping portion 32, and is a hollow that can surround the conductor tip portion 201a. It is formed into a shape.

  The coated crimping portion 34 is a portion corresponding to the coated distal end portion 202a in the longitudinal direction X of the wire crimping portion 32 in a state where the wire distal end portion 200a is inserted into the wire crimping portion 32, and is a hollow that can surround the coated distal end portion 202a. It is formed into a shape.

Then, the manufacturing method of the electric wire 1 with a crimp terminal mentioned above is demonstrated using FIG.2 and FIG.3.
The electric wire 1 with a female crimp terminal is a punching process, a bending process, a longitudinal welding process, a sealing part forming process, an X-ray impermeable material applying process, and an electric wire with respect to a copper alloy strip (not shown) such as brass. It is manufactured by performing the insertion process and the crimping process in this order.

  Here, Fig.2 (a) is an external view of the 2nd intermediate | middle terminal base material 100A mentioned later formed after a longitudinal direction welding process. FIG.2 (b) is a perspective view which shows the electric wire front-end | tip part 200a in the state before and after an X-ray impermeable material provision process. FIG.2 (c) is explanatory drawing of an electric wire insertion process. In detail, it is explanatory drawing which shows the state before inserting the electric wire front-end | tip part 200a in the electric wire crimping | compression-bonding part 32A before compression.

  FIG. 3 is an explanatory diagram of the crimping process. Specifically, FIG. 3A is a cross-sectional view showing a state immediately before the wire crimping portion 32A before compression is crimped by the press mold 300, and the compression portion 30A before compression is crimped by the press mold 300. It is sectional drawing which shows a mode.

In the punching step, the plate-shaped copper alloy strip is punched into a developed shape in which the crimp terminal 10 is developed to form a plate-shaped terminal base material (not shown).
In the bending step, the plate-like terminal base material is bent to form a first intermediate terminal base material (not shown).

  In the subsequent longitudinal welding step, in the state where the barrel piece 101 of the first intermediate terminal base material is bent into a cylindrical shape around the longitudinal direction X, the end portions in the protruding direction of the barrel piece 101 are in the circumferential direction. The opposite end portions 101a, 101a that are butted together in FIG. 2 are welded along the longitudinal direction X to form a second intermediate terminal substrate 100A as shown in FIG.

In the subsequent sealing part forming step, the front part of the crimping part 30 is compressed to form the sealing part 31 that seals the front part 31A (see reference numeral 31 in FIG. 2C).
In addition, you may perform suitably the width direction welding process of welding along the width direction of the sealing part 31 after a sealing part formation process.

  In the subsequent X-ray non-transparent material application step, as shown in FIG. 2 (b), X-rays are obtained by soldering a fluid X-ray non-transparent material 51A having fluidity to the surface of the conductor tip 201a. A non-transmissive portion 51 is formed.

  Specifically, in the X-ray non-transparent material application step, the fluid X-ray non-transparent material 51A is soldered over substantially the entire surface in the longitudinal direction and the circumferential direction of the conductor tip portion 201a.

  The flowable X-ray non-transparent material 51A is formed by containing lead, which is a conductive metal, having a density higher than that of copper which is a main forming material of the crimping portion 30, and has fluidity in a molten state. Solder material.

  Specifically, the flowable X-ray non-transparent material 51A is an alloy material obtained by adding silver and copper to lead as a main component, and is a gel-like solder material in a molten state.

  Since the flowable X-ray non-transmissive material 51A has a high viscosity and is excellent in quick-drying properties, it does not sag after being soldered to the conductor tip portion 201a, and the X-rays are formed on the entire surface of the conductor tip portion 201a. The non-transmissive portion 51 can be easily formed.

  In the subsequent electric wire insertion step, the electric wire tip portion 200a of the covered electric wire 200 is inserted into the cylindrical compression portion 30 before compression.

  Specifically, as shown in FIG. 3 (a) from the state shown in FIG. 2 (c) from the rear end side in the longitudinal direction X of the compression portion 30A before compression, the wire tip 200a before compression is shown in FIG. 3 (a). Insert until it is placed in the crimping part 32A.

  That is, as described above, when the electric wire tip portion 200a is inserted until it is arranged in the electric wire crimping portion 32A, the conductor tip portion 201a is arranged in the conductor crimping portion 33A of the electric wire crimping portion 32A as shown in FIG. At the same time, the coated tip 202a is disposed on the coated crimping portion 34A of the wire crimping portion 32A.

The subsequent crimping step is a step of compressing the compression portion 30A before compression.
Specifically, as shown in FIG. 3A, the press mold 300 includes an upper press mold 301 disposed on one side (upper side) in the thickness direction with the second intermediate terminal base material 100 </ b> A and the other side ( A lower press mold 302 arranged on the lower side is configured as a pair.

In the crimping step, the upper press mold 301 and the lower press mold 302 are disposed opposite to each other in the thickness direction across the second intermediate terminal base material 100A. By moving at least one of the press molds 302 to the other side, as shown in FIG. 3B, the wire crimping portion 32A with the wire tip portion 200a inserted is press molded.
By the above, the electric wire 1 with a crimp terminal which makes it the object which confirms the crimping | compression-bonding shape inside the crimping | compression-bonding part of a crimping | compression-bonding state by the crimping-shape display method can be manufactured.

Next, an X-ray irradiation apparatus 80 as a pressure-bonding shape display device used when performing the pressure-bonding shape display method will be described with reference to FIG.
FIG. 4 is an explanatory diagram schematically showing the hardware configuration of the X-ray irradiation apparatus 80.

  The X-ray irradiation apparatus 80 includes an X-ray irradiation unit 91 and a control unit 81.

  The X-ray irradiation unit 91 includes a high-voltage generator 91 that amplifies an applied voltage applied from the control unit 81 side to an output voltage corresponding to a wavelength of a predetermined X-ray irradiated from the X-ray irradiation unit 92, and a high-voltage generator An X-ray irradiation unit 92 that irradiates X-rays having a predetermined wavelength based on an output voltage amplified from 91, a diaphragm unit 93 that can adjust an X-ray irradiation range, and an X-ray that detects the irradiated X-rays The moving part 96 includes a detection unit 94, a terminal holding unit 95 that holds the female crimp terminal 10 disposed between the X-ray irradiation unit 92 and the X-ray detection unit 94.

  In addition, the X-ray irradiation part 92 is installed above the wire crimping part 32 of the female crimp terminal 10.

  The control unit 81 includes a control unit 82, a storage unit 83, an operation unit 84, a display unit 85, a voltage application processing unit 86, and an image processing unit 87, and each is connected via a bus 88.

  The control unit 82 as a control unit is configured by a CPU (not shown) and the like, and is connected to the voltage application processing unit 86 and the image processing unit 87, and executes and controls the voltage application processing unit 86 and the image processing unit 87.

  The storage unit 83 as a storage unit is configured by a ROM, a RAM, or the like (not shown), and stores image data acquired from various control programs and X-ray detection, and edited image data edited by the image processing unit 87. Yes.

  For example, an operation unit 84 as an operation unit (input unit) is used to set a wavelength of X-rays emitted from the X-ray irradiation unit 92 or to input parameters as appropriate, such as a voltage amplification factor of the high voltage generation unit 91. Keyboard, switch, touch panel.

The display unit 85 displays an edited image obtained by image processing of the data image detected from the X-ray detection unit 94 by the image processing unit 87 on the screen.
The voltage application processing unit 86 outputs an applied voltage for irradiating X-rays from the X-ray irradiation unit 92.

  The image processing unit 87 performs editing processing into a data format that can be displayed on the display unit 85 based on the image data detected by the X-ray detection unit 94.

  The moving mechanism 96 is a mechanism for moving the X-ray irradiation unit 92 and the X-ray detection unit 94 integrally in a state where the X-ray irradiation unit 92 and the X-ray detection unit 94 are held in a positional relationship facing each other with the terminal holding unit 95 therebetween. And a power mechanism such as a motor and hydraulic pressure, and a power transmission mechanism such as a linear guide, a link mechanism, and a gear.

  As described above, X-ray irradiation from various directions is possible, not limited to the X-ray irradiation by the X-ray irradiation unit 92 from the plane side at least on the electric wire crimping portion 32. Thereby, the crimping | compression-bonding state including the internal shape of the wire crimping part 32 can be observed as a three-dimensional image, such as calculating | requiring the crimping | compression-bonding rate of the wire crimping part 32, for example.

Subsequently, the above-described crimped shape display method performed using the above-described X-ray irradiation apparatus 80 will be described with reference to FIGS. 5 (a), 5 (b), and FIG. 6.
5 (a) and 5 (b) are both X-rays (FIGS. 1, 4A and 5) from the X-ray irradiation unit 92 to at least the wire tip portion 200a of the wire 1 with a crimp terminal. (Xr) of FIG. 5 is an explanatory view schematically showing the state of irradiation. Specifically, FIG. 5A is a longitudinal sectional view of the female crimp terminal 10, and FIG. It is an AA line end view of a). FIG. 6 is an explanatory diagram schematically showing the state of the crimping part 30 displayed on the display unit 85.

  In the crimping shape display method, an X-ray irradiation process and a crimping shape display process are performed on the electric wire with a crimp terminal 1 including the X-ray non-transparent part 51 inside the crimped part 30 in a crimped state. This is a method of displaying the crimping shape inside the crimping part 30 in the state.

  The X-ray irradiation step is a step of irradiating X-rays toward the crimping portion 30 from the upper side with respect to the crimping portion 30 in a crimped state, as shown in FIGS. 1 and 5A and 5B. Specifically, as shown in FIG. 4, in a state where the female crimp terminal 10 is held by the terminal holder 95, X-rays are emitted from the X-ray irradiation unit 92 disposed above the female crimp terminal 10. Irradiation is performed toward at least the wire crimping portion 32 in the female crimp terminal 10.

  At this time, after the applied voltage is output from the voltage application processing unit 86 to the X-ray irradiation unit 92 side, a predetermined output voltage value based on the wavelength of the X-ray set based on the operation of the operation unit 84 is obtained. The applied voltage is amplified by the high voltage generator 91.

Thereby, it is possible to irradiate the X-rays from the X-ray irradiation unit 92 toward at least the electric wire crimping part 32 in the female crimp terminal 10 under a predetermined set wavelength.
Here, the X-rays are not displayed so as to be visible by the display unit 85 because the X-rays pass through the crimped portion 30 mainly made of copper, but as shown in FIG. The X-ray non-transmission part 51 made of lead has a lower X-ray transmittance, that is, it becomes difficult to transmit, and is irradiated from the X-ray irradiation part 92 at a predetermined wavelength that is visible by the display part 85. Will be.
That is, an output voltage corresponding to a predetermined wavelength is output from the high voltage generator 91 so that X-rays are irradiated at such a predetermined wavelength.

  In the display step, the crimping shape inside the crimping part 30 in the crimped state is determined based on the shape of the X-ray non-transmissive part 51 that is identified as a part other than the X-ray non-transmissive part 51 by X-ray irradiation in the wire crimping part 32. More specifically, the X-ray emitted from the X-ray irradiating unit 92 is detected by the X-ray detecting unit 94, and the detected data is edited by the image processing unit 87. FIG. As shown in the drawing, an X-ray image showing the crimped shape inside the crimped part 30 in the crimped state is displayed on the display unit 85.

The effect which the electric wire 1 with a crimp terminal mentioned above and the crimping | compression-bonding display method show | plays is demonstrated.
As described above, in the crimping shape display method, the crimped state of the crimped terminal-attached electric wire 1 including the X-ray non-transmissive portion 51 that shields the X-rays transmitted through the crimped portion 30 inside the crimped portion 30 in the crimped state. An X-ray irradiation process for irradiating at least the crimping part 30 with X-rays from the outside of the crimping part 30 toward the crimping part 30, and an X-ray non-transparent part 51 that is distinguished from other parts by X-ray irradiation This is a crimping shape display method for performing a display step of displaying the crimping shape inside the crimping part 30 in the crimped state based on the shape.

  Thus, by irradiating X-rays toward the crimping part 30 in the X-ray irradiation process, the shape of the X-ray non-transmissive part 51 included in the crimping part 30 can be distinguished from other parts in the display process. The internal shape of the crimping part 30 in the crimped state can be displayed in a visualized state.

  For example, when the crimping state including the internal shape of the wire crimping portion 32 is observed as a three-dimensional image, such as obtaining the crimping rate of the wire crimping portion 32, the moving mechanism 96 appropriately The X-ray detection unit 94 can detect the X-rays emitted from various directions by the X-ray irradiation unit 92 while moving the X-ray detection unit 94 with respect to the terminal holding unit 95.

  Therefore, it can be confirmed accurately and easily whether the conductor tip 201a and the crimping portion 30 of the female crimp terminal are properly crimped.

  For example, when inspecting the electric wire 1 with a crimp terminal, the crimp shape inside the crimp portion 30 of the crimped state of the electric wire 1 with the crimp terminal is displayed and confirmed by adopting the above-described crimp shape display method. Since the inspection accuracy of the crimping shape of the crimping portion 30 can be significantly increased, the yield of the electric wire 1 with crimping terminal can be improved.

  In addition, the crimping portion 30 is formed in a hollow shape in which the conductor distal end portion 201a can be inserted from the proximal end side to the inside and the conductor distal end portion 201a can be surrounded.

  That is, the crimping part 30 is configured as a so-called closed barrel crimping part 30 in which the cylindrical crimping part 30A is compressed before crimping, for example.

  In such a closed barrel type crimping portion 30, it is difficult to visually confirm the inner crimping shape from the outside in the crimped state. However, according to the above-described crimping shape display method, X-ray irradiation causes X By identifying the shape of the non-transparent part 51, the crimping shape inside the crimping part 30 can be confirmed reliably.

  Moreover, the electric wire 1 with a crimp terminal mentioned above forms the conductor front-end | tip part 201a with an aluminum-type material, and forms the crimp part 30 with a copper-type material.

  Here, since copper is a metal having a higher density than aluminum, when X-rays are irradiated to such a female crimp terminal 10, the X-ray is only formed by a crimp part 30 formed of a copper-based material. X-rays are also transmitted through the conductor tip 201a made of an aluminum-based material.

  However, as described above, in the manufacturing process of the electric wire 1 with the crimp terminal, by performing the X-ray non-transparent material application process as the X-ray non-transmission part arranging process, the female crimping is performed inside the crimp part 30 before the crimping. An X-ray non-transparent portion 51 formed of lead having a density higher than that of the material for forming the terminal 10 can be disposed, and X-rays can be blocked by the X-ray non-transparent portion 51 during the X-ray irradiation process. it can.

  Therefore, even when the female crimp terminal 10 formed of copper, which is a metal having a density equal to or higher than that of aluminum, which is the material of the conductor 201 is used, in the display process, the X-ray non-transparent in the crimp section 30 is used. Since the shape of the part 51 can be distinguished from other parts, the crimping shape inside the crimping part 30 that cannot be visually confirmed from the outside of the crimping part 30 can be confirmed.

  Further, when the conductor itself including the conductor tip 201a is formed of an aluminum-based material, the weight can be reduced as compared with the covered electric wire 200 having a conductor portion made of copper wire, and as described above, the X-rays are formed inside the crimp portion 30. By providing the non-transmissive portion 51, it is possible to display the pressure-bonding shape inside the pressure-bonding portion 30 and confirm it visually.

  Specifically, if the copper-based material conventionally used for the conductor part of the covered electric wire is replaced with an aluminum-based material such as aluminum or aluminum alloy, and the conductor part made of the aluminum-based material is crimped to the crimp terminal, the terminal material Phenomenon in which an aluminum-based material, which is a base metal, is corroded by contact with a noble metal such as lead plating, gold plating, or copper alloy, that is, so-called dissimilar metal corrosion (electric corrosion) becomes a problem.

The electrolytic corrosion is a phenomenon in which, when moisture adheres to a site where a noble metal and a base metal are in contact, a corrosion current is generated, and the base metal is corroded, dissolved, or lost. Due to this phenomenon, the conductor portion made of the aluminum-based material that is crimped to the crimping portion 30 of the crimping terminal is corroded, dissolved, or lost, and eventually the electrical resistance increases. As a result, there is a problem that a sufficient conductive function cannot be achieved.
However, as described above, the X-ray non-transparent portion 51 is provided inside the crimp portion 30 while reducing the weight as compared with the covered electric wire having a conductor portion made of a copper-based material. It becomes possible to display and confirm.

  Moreover, the sealing part 31 is formed in the front end side of the crimping | compression-bonding part 30 in the front end side of the conductor crimping | compression-bonding part 33 in the crimping | compression-bonding part 30 by performing the sealing part formation process before an electric wire insertion process.

  Thus, by forming the sealing portion 31 on the distal end side of the conductor crimping portion 33 in the crimping portion 30, the front side of the crimping portion 30 is sealed in the crimping state, and the front side of the crimping portion 30. Since the penetration of moisture into the inside of the crimping portion 30 can be prevented, the water stopping performance can be improved. On the other hand, including the front side of the crimping portion 30, the inside of the crimping portion 30 can be crimped. The shape cannot be seen at all.

  However, even if it is difficult to visually confirm the inner crimping shape from the outside of the crimping part 30 as described above, the crimping process can be performed by performing the X-ray irradiation process and the display process as described above. The crimping shape inside the portion 30 can be displayed firmly.

Below, the electric wires 1Pa, 1Pb, 1Pc, 1Pd, 1Pe with crimp terminals and the crimp shape display method in other embodiments will be described.
However, among the configurations of the crimped terminal-equipped wires 1Pa, 1Pb, 1Pc, 1Pd, 1Pe and the crimped shape display method described below, the same configurations as those of the crimped terminal-equipped wire 1 in the first embodiment described above are the same. The description is abbreviate | omitted and the description is abbreviate | omitted.

(Second Embodiment)
FIG. 7 is an explanatory view of the crimp shape display method according to the second embodiment and the crimped terminal-attached electric wire 1Pa to which the crimp shape display method is applied. Specifically, FIG. FIG. 7B is a longitudinal sectional view showing a portion of the female crimp terminal 10Pa of the wire 1Pa with a crimp terminal of the second embodiment. FIG. 7C is an explanatory view schematically showing a state of the crimp part 30 of the electric wire 1 Pa with the crimp terminal of the second embodiment displayed on the display unit 85.

  As shown in FIG. 7A, the electric wire 1Pa with a crimp terminal according to the second embodiment forms an X-ray non-transmissive portion 51 only in a portion corresponding to the tip portion of the wire tip portion 200a in the crimp portion 30. doing.

  That is, in the X-ray impermeable material application step, when the flowable X-ray impermeable material 51A is soldered to the electric wire tip portion 200a as shown in FIG. 7A, it flows only to the tip portion of the electric wire tip portion 200a. The X-ray non-transparent portion 51 is formed by soldering the characteristic X-ray non-transparent material 51A.

  As shown in FIG. 7B, the electric wire 1Pa with a crimp terminal manufactured by the above-described manufacturing method is provided between the tip portion of the conductor tip portion 201a and the conductor crimp portion 33 corresponding to the conductor tip portion 201a. Thus, the X-ray non-transparent portion 51 is interposed.

  In the crimping shape display method, when the X-ray irradiation process and the display process are performed on at least the wire crimping part 32 of the electric wire 1Pa with the crimping terminal, as shown in FIG. A portion corresponding to the tip portion of the wire tip portion 200a inside the portion 32 is displayed.

In this way, by displaying the tip portion of the wire tip portion 200a which is easily dispersed or displaced in the inside of the crimp portion 30 by the crimping step in the longitudinal direction of the wire tip portion 200a, Since the position of the tip portion of the wire tip portion 200a in the crimp portion 30 can be visually confirmed, whether the position and orientation of the entire wire tip portion 200a is appropriate or greatly deviated based on this position Can be fully confirmed.
Therefore, it is possible to efficiently confirm the crimping shape inside the crimping portion 30 while minimizing the amount of the flowable X-ray non-transmissive material 51A used.

(Third embodiment)
FIG. 8A is an explanatory diagram of the electric wire insertion process of the third embodiment, and FIG. 8B is a longitudinal sectional view showing the female crimp terminal 10 of the crimp terminal-equipped electric wire 1Pb of the third embodiment. FIG. 8C is an explanatory view schematically showing a state of the crimping portion 30 of the electric wire 1Pb with crimp terminal of the third embodiment displayed on the display portion 85. FIG.

  In the X-ray non-transparent portion arranging step of the third embodiment, the fluid X-ray non-transparent material 51A is injected and filled into the inside of the crimp portion 30 before the crimping. In addition, since the fluid X-ray non-transparent material 51A is in a state where it is stored so as not to come into contact with air inside the crimping part 30 before crimping, drying of the fluid X-ray non-transparent material 51A can be delayed, It can be kept in a gel state.

  In the electric wire insertion process, as shown in FIG. 8A, the conductor tip 201a is inserted into the inside of the crimping part 30 before being crimped filled with the fluid X-ray non-transparent material 51A. At this time, part of the fluid X-ray impermeable material 51A is pushed out from the inside of the crimping portion 30 through the proximal end side opening with the insertion of the electric wire distal end portion 200a.

  In the subsequent crimping step, the wire crimping portion 32A is crimped to the wire tip portion 200a. As a result, as shown in FIG. 8B, even if the void portion remains inside the wire crimping portion 32A before the crimping step, the entire X-ray portion is fluidized by the crimping step. The non-transparent material 51A can be spread evenly, and the fluid X-ray non-transparent material 51A can be filled in the entire inside of the crimping part 30 so that the gap portion does not remain.

  As shown in FIG. 8B, the flowable X-ray non-transparent material 51 </ b> A is not only between the conductor tip portion 201 a and the conductor crimp portion 33, but also the coated tip portion 202 a and the coated crimp portion. 34 can be firmly interposed between the two.

  Thus, in the X-ray irradiation step and the display step, when X-rays are applied to at least the crimping portion 30 of the crimped terminal-attached electric wire 1Pb manufactured by the above-described manufacturing method, as shown in FIG. 30 is not limited to the crimping shape between the conductor crimping portion 33 and the conductor distal end portion 201a, but in the crimping portion 30 including the crimping shape between the coated crimping portion 34 and the coated distal end portion 202a and the proximal end portion of the crimping portion 30. The crimping shape on the insertion port side into which the wire tip portion 200a is inserted can also be displayed.

  Therefore, it is possible to visually confirm the inside of the crimping portion 30 including the crimping shape on the insertion port side of the crimping portion 30, which cannot be visually confirmed from the outside, such as the close contact between the coating crimping portion 34 and the coating tip portion 202 a. it can.

(Fourth embodiment)
The electric wire 1Pc with a crimp terminal of the fourth embodiment is manufactured by performing an X-ray non-transmissive member attaching step of attaching an X-ray non-transmissive member to the surface of the conductor tip portion 201a as an X-ray non-transmissive portion arranging step. .

FIG. 9 is an explanatory view of a method of manufacturing the electric wire 1Pc with crimp terminal of the fourth embodiment. Specifically, the electric wire 1Pc with crimp terminal of the fourth embodiment can be configured in various variations. 9 (a), (b2), (c2), (d), and (e) can be configured in five types of embodiments.
As shown in FIG. 9A, in the X-ray non-transparent member attaching step, the conductor tip portion 201a is disposed on one end side in the width direction of the X-ray non-transmissive sheet 51Ba, and the X-ray non-transmissive sheet is placed on the conductor tip portion 201a. The X-ray non-transmission part 51 is formed by winding 51Ba.

  The X-ray non-transmissive sheet 51Ba is formed into a sheet shape having flexibility and conductivity by using, for example, an alloy material mainly composed of lead, and the length direction corresponds to the length in the longitudinal direction of the conductor tip portion 201a. At the same time, the width direction is formed in a substantially rectangular shape corresponding to the circumferential length of the conductor tip 201a.

  As described above, by forming the X-ray non-transmissive portion 51 on the surface of the conductor tip portion 201a by the X-ray non-transmissive member attaching step, the fluid X-ray non-transmissive member 51A is melted or a tool such as a soldering iron is used. However, the X-ray non-transmission part 51 can be smoothly formed only by winding the X-ray non-transmission sheet 51Ba around the conductor tip part 201a.

  As shown in FIG. 9 (b1), as the X-ray non-transparent member 51B, a cylindrical X-ray non-transparent member 51Bb formed in a substantially cylindrical shape into which the conductor tip 201a can be inserted can be configured.

  In the X-ray non-transmissive member attaching step, the cylindrical X-ray non-transmissive member 51Bb can be easily attached as shown in FIG. 9 (b2) simply by being inserted into the conductor tip 201a. The electric wire front-end | tip part 200a provided with non-permeable member 51Bb can be comprised.

  Alternatively, as shown in FIG. 9 (c1), as the X-ray non-transparent member 51B, a bottomed tube formed in a bottomed cylindrical shape in which a conductor tip 201a is insertable and one end side in the length direction is closed. The X-ray non-transparent member 51Bc can be configured.

  In the X-ray non-transmissive member attaching step, the bottomed cylindrical X-ray non-transmissive member 51Bc can be easily attached as shown in FIG. 9 (c2) simply by being inserted into the conductor tip 201a. The electric wire front-end | tip part 200a provided with cylindrical X-ray non-transmissive member 51Bc can be comprised.

  Further, for example, the X-ray non-transparent member 51B is not limited to being formed in a sheet shape or a cylindrical shape, but is also illustrated as an annular X-ray non-transparent member 51Bd as shown in FIG. Such a spiral X-ray non-transparent member 51Be may be formed in a linear shape.

  As described above, if the X-ray non-transparent member 51B is attached to at least the tip portion of the wire tip portion 200a, the rough position and orientation of the wire tip portion 200a can be grasped by X-ray observation, and the wire tip portion The crimping shape of 200a can be confirmed efficiently.

  Although not shown in the drawings, the X-ray non-transparent member 51B may be formed in various shapes such as a C-ring formed by cutting out a part in the circumferential direction.

(Fifth embodiment)
FIG. 10 is an explanatory diagram of the electric wire 1Pd with a crimp terminal according to the fifth embodiment. Specifically, FIG. 10 (a) is an explanatory diagram of the covered electric wire 200Pd provided in the electric wire 1Pd with the crimp terminal according to the fifth embodiment. FIG. 10B is a longitudinal sectional view of the wire tip portion 200a of the covered wire 200Pd of the fifth embodiment, and FIG. 10C is a sectional view taken along line AA of FIG.

  The covered electric wire 200Pd in the electric wire 1Pd with crimp terminal according to the fifth embodiment is mainly composed of lead having a density higher than that of copper, with one of the core wires constituting the conductor 201 serving as the X-ray non-transmissive portion 51. An X-ray non-transparent core wire 51f made of an alloy material is formed, and the remainder is formed of an aluminum core wire 201s.

  In the crimping shape display method using the electric wire 1Pd with a crimp terminal, in the X-ray irradiation process and the display process, when X-rays are irradiated to the crimping portion 30, among the plurality of core wires constituting the conductor 201, Only one X-ray non-transparent core wire 51 f made of a lead alloy serves as the X-ray non-transmission part 51 and blocks X-rays transmitted through the crimping part 30.

Therefore, a rough position and inclination can be visually confirmed over the entire length of the conductor tip 201a inside the crimping portion 30.
Since the aluminum core wire 201s has a density lower than that of the copper forming the crimping portion 30, the X-ray passes through the aluminum core wire 201s when irradiated with X-rays having a wavelength that passes through the crimping portion 30.

  Furthermore, since only one of the core wires constituting the conductor 201 is an X-ray non-transparent core wire 51f made of a lead alloy and the other core wire 201 is formed of an aluminum core wire 201s, X-ray irradiation is performed as described above. In the process and the display process, in addition to being able to display the crimping shape inside the crimping part 30, it is lighter than when all the core wires constituting the conductor 201 are formed by the X-ray non-transparent core wire 51f. Can be achieved.

  However, the electric wire 1Pd with a crimp terminal is made of a lead alloy like the conductor 201 in the electric wire 1Pd with the crimp terminal of the fifth embodiment, except that all of the plurality of core wires constituting the conductor 201 are formed by the aluminum core wire 201s. Any configuration including at least one X-ray non-transparent core wire 51f may be used.

(Sixth embodiment)
FIG. 11 is an explanatory view of the covered electric wire 200Pe provided to the electric wire 1Pe with crimp terminal according to the sixth embodiment. Specifically, FIG. 11 is a cross-sectional view orthogonal to the enlarged longitudinal direction of the covered electric wire 200Pe according to the sixth embodiment. Indicates.

  In the covered electric wire 200Pe in the electric wire 1Pe with crimp terminal of the sixth embodiment, each of a plurality of core wires constituting the conductor 201 is constituted by a lead clad wire 201t.

  The lead clad wire 201t is a composite wire in which an X-ray non-transparent layer 51g made of a lead alloy is formed on the surface layer of the main wire 201t1 mainly made of aluminum, as shown in a partially enlarged view in FIG. It is.

  In such a crimp shape display method using the electric wire with a crimp terminal 1Pe, when X-rays are irradiated to the crimp portion 30 in the X-ray irradiation step and the display step, lead as a plurality of core wires constituting the conductor 201 is obtained. Since the X-ray non-transmissive layer 51g made of lead is formed as the X-ray non-transmissive portion 51 outside the cladding wire 201t, the X-rays transmitted through the crimping portion 30 are blocked.

  Accordingly, it is possible to visually confirm the position and inclination over the entire length of the conductor tip 201a inside the crimping portion 30.

  Moreover, since the core wire 201t1 can be formed of aluminum by forming each of the core wires constituting the conductor 201 as the lead clad wire 201t, the surface layer is utilized while taking advantage of the light weight of aluminum. The formed X-ray non-transparent layer 51g can block X-rays that have passed through the crimping portion 30.

  In addition, the electric wire 1Pe with the crimp terminal is not limited to each of the plurality of core wires constituting the conductor 201 being constituted by the lead clad wire 201t, and at least one core wire may be constituted by the lead clad wire 201t.

  In addition, the electric wire 1Pe with a crimp terminal is not limited to the lead-clad wire 201t, and at least one core wire among the plurality of core wires constituting the conductor 201, for example, a trunk wire 201t1 formed of aluminum or the like. For example, it may be configured by a plated wire in which a plated layer plated with lead or silver is formed on the surface.

In the correspondence between the configuration of the present invention and the embodiment,
The crimp connection structure of the present invention corresponds to the electric wire with crimp terminal of the embodiment 1, 1Pa, 1Pb, 1Pc, 1Pd, 1Pe,
Similarly,
The crimp terminal corresponds to the female crimp terminal 10, 10Pa, 10Pb,
The present invention is not limited to the configuration of the above-described embodiment, but can be applied based on the technical idea shown in the claims, and many embodiments can be obtained.
For example, in the crimping shape display method, the application target is not limited to the crimping portion 30 having the above-described shape, but a U-shaped crimping portion 30x having a U-shaped cross-sectional view when viewed from the front side in the longitudinal direction X. The crimping shape inside the crimping part 30x may be displayed as shown in FIG. 12A by applying the crimping shape display method.

  Furthermore, as shown above by the crimping shape display method, not only the crimping shape inside the closed barrel crimping portions 30 and 30X is displayed, but the open barrel crimping portion 30Y as shown in FIG. The inner crimping shape may be displayed.

  The X-ray irradiation apparatus 80 is not limited to the configuration in which the X-ray irradiation unit 92 and the X-ray detection unit 94 can be moved relative to the terminal holding unit 95 by the moving mechanism 96. The terminal holding unit 95 may be configured to be relatively movable with respect to the X-ray detection unit 94, and at least the electric wire crimping unit 32 may be irradiated with X-rays from various directions.

  Further, the X-ray irradiation apparatus 80 may irradiate at least the electric wire crimping portion 32 with the X-ray by the X-ray irradiation portion 92 fixed above the electric wire crimping portion 32 without including the moving mechanism 96. Furthermore, the X-ray irradiation device 80 is at least provided by the X-ray irradiation unit 92 fixed to the electric wire crimping unit 32 on, for example, the lower side, the left side, the right side, the front side in the longitudinal direction X, or the rear side. You may irradiate the wire crimping part 32 with X-rays.

1,1Pa, 1Pb, 1Pc, 1Pd, 1Pe ... Electric wire with crimp terminal 10, 10Pa, 10Pb ... Female crimp terminal 30 ... Crimp part 30A, 30X, 30Y ... Crimp part before crimp 31 ... Sealing part 51 ... X-ray Non-transparent part 51A ... Fluid X-ray non-transparent material 51B ... X-ray non-transparent member 51Ba ... X-ray non-transparent sheet 51Bb ... Cylindrical X-ray non-transparent member 51Bc ... Bottomed cylindrical X-ray non-transparent member 51Bd ... Ring X Non-transparent member 51Be ... Spiral X-ray non-transparent member 51f ... Non-transparent core wire 51g ... X-ray non-transparent layer 201a ... Conductor tip 200, 200Pd, 200Pe ... Covered wire 201 ... Conductor 202 ... Insulation coating

Claims (17)

A connection structure in which a conductor is covered with an insulating coating, and at least the conductor tip and a crimping portion of a crimping terminal are crimped and connected in a covered electric wire having a conductor tip exposed by peeling off the insulating coating on the tip side. A crimping shape display method for displaying a crimping shape inside the crimping part in a crimped state in a body,
An X-ray non-transparent part that shields X-rays transmitted through the pressure-bonding part is provided inside the pressure-bonded part in a pressure-bonded state, and the X-ray non-transparent part has a material having a higher density than the material of the pressure-bonding part. Formed,
An X-ray irradiation step of irradiating X-rays from the outside of the pressure-bonded portion in a pressure-bonded state toward the pressure-bonded portion;
A pressure-bonding shape display method for performing a display step of displaying a pressure-bonded shape inside the pressure-bonded portion in a pressure-bonded state based on a shape of the X-ray non-transparent portion identified from other portions by X-ray irradiation. It is a manufacturing method of the connection structure used for the press-fit shape display method according to claim 1,
The manufacturing method of the connection structure which formed the said crimping | crimped part in the hollow shape which can insert the said conductor front-end | tip part into the inside from a base end side, and can surround this conductor front-end | tip part. Forming the crimp terminal with a material having a density equal to or higher than that of the conductor;
The manufacturing method of the connection structure of Claim 2 which performs the X-ray non-transmission part arrangement | positioning process which arrange | positions the said X-ray non-transmission part inside the said crimping | compression-bonding part before crimping | compression-bonding. Forming the X-ray non-transparent portion with a fluid X-ray non-transparent material having fluidity;
As the X-ray non-transparent part arranging step, the flowable X-ray non-transparent material is applied to at least one of the surface of the conductor tip and the inside of the pressure-bonded part before pressure bonding. Perform the process,
The manufacturing method of the connection structure of Claim 3 which performs the said X-ray opaque material provision process before inserting the said conductor front-end | tip part in the inside of the said crimping | compression-bonding part before crimping. The manufacturing method of the connection structure of Claim 4 which fills the inside of the said crimping | compression-bonding part before the crimping | compression-bonding with the said fluid X-ray opaque material in the said X-ray non-permeable material provision process. The X-ray non-transparent part is formed of an X-ray non-transparent member that can be attached to the conductor tip or the inside of the crimping part,
As the X-ray non-transparent portion arranging step, an X-ray non-transparent member attaching step for attaching the X-ray non-transparent member to the surface of the conductor tip portion or the inside of the crimp portion before pressure bonding,
The method for manufacturing a connection structure according to claim 4 or 5, wherein the X-ray non-transparent member attaching step is performed before the conductor tip portion is inserted into the crimp portion before crimping. Set the crimping part of the conductor tip in the crimping part to the conductor crimping part,
7. A sealing portion for sealing the tip end side is formed on the tip end side of the conductor crimping portion in the crimping portion before the conductor tip portion is inserted into the crimping portion before crimping. The manufacturing method of the connection structure as described in any one of these. The method for manufacturing a connection structure according to any one of claims 2 to 7, wherein at least a part of the conductor tip portion is formed by the X-ray non-transmissive portion. The manufacturing method of the connection structure according to any one of claims 2 to 8, wherein the conductor tip portion is formed of an aluminum-based material, and the crimping portion is formed of a copper-based material. A connection in which at least the tip of the conductor and the crimp portion of the crimp terminal are crimped and connected in a covered electric wire provided with a conductor tip that covers the conductor with an insulation coating and peels off the insulation coating on the tip side to expose the conductor A structure,
An X-ray non-transparent portion that blocks X-rays transmitted through the pressure-bonded portion is provided inside the pressure-bonded portion in a pressure-bonded state, and the X-ray non-transmissive portion has a metal having a density higher than that of the material of the pressure-bonded portion. The connection structure formed. The connection structure according to claim 10, wherein the crimping portion is formed in a hollow shape in which the leading end portion of the conductor can be inserted from the base end side to the inside and the leading end portion of the conductor can be surrounded. In the connection structure including the crimp terminal formed of a material having a density equal to or higher than that of the conductor material,
The connection structure according to claim 10 or 11, wherein the X-ray non-transparent portion is disposed inside the crimping portion before crimping. Forming the X-ray non-transparent portion with a fluid X-ray non-transparent material having fluidity;
The connection structure according to claim 12, wherein the fluid X-ray non-transparent material is interposed between the conductor tip and the crimped part in a crimped state. The X-ray non-transparent part is formed of an X-ray non-transparent member that can be attached to the conductor tip or the inside of the crimping part,
The connection structure according to claim 12 or 13, wherein the X-ray non-transparent member is interposed between the conductor tip and the crimped part in a crimped state. Set the crimping part of the conductor tip in the crimping part to the conductor crimping part,
The connection structure according to any one of claims 10 to 14, wherein a sealing portion that seals the distal end side is formed on a distal end side of the conductor crimping portion in the crimping portion. The connection structure according to any one of claims 10 to 15, wherein at least a part of the conductor tip portion is formed by the X-ray non-transmissive portion. The connection structure according to any one of claims 10 to 16, wherein the conductor tip portion is formed of an aluminum-based material and the crimping portion is formed of a copper-based material.

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