Abstract:
Connector terminals are provided to enable connection of electrical cables and connector terminals automatically to prevent the connector terminals from being inserted into sub-harnesses in later stages, and to make circuit modification easier. The connector terminals include respectively a male terminal portion at one end and a female terminal portion at the other end. The respective connector terminals further include a cable-fit portion. The connector terminals are contained in a junction case with top and bottom openings. Electrical cables are then wired in the junction case and fitted into the connector terminals. When several such junction cases are superposed, the male terminal portions fit into the female terminal portions through the openings, and the electrical cables separately wired in different junction cases are connected to one another.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to connector terminals, junction connectors containing such connector terminals, and wire harnesses equipped with such junction connectors. The connector terminals, junction connectors and wire harnesses of the present invention find applications e.g. in the automobile industry, where connection circuits must be branched in many different configurations. 
     2. Description of Background Information 
     FIG. 1 shows how an automobile wire harness W/H is assembled from a plurality of sub-harnesses. Sub-harnesses  1 ,  2 ,  3 , etc. are first prepared by preliminarily binding electrical cables (primary bundling or binding step). The preliminarily bound sub-harnesses  1 ,  2 ,  3 , etc. are then wired on a wire harness diagram sheet, while being held by a wiring tool. The sub-harnesses are then taped, or bound by an equivalent means, to obtain an assembled wire harness (final bundling or binding step). 
     When preparing sub-harnesses from electrical cables (primary bundling step), end portions of the constituent electrical cables w are inserted into connectors  4 . When the electrical cables are to be connected to the connectors of another sub-harness, of a junction connector or of any other apparatus, an end portion of those electrical cables is provided with a terminal  5 . In the primary bundling step where the sub-harnesses  1 ,  2  and  3  are preliminarily bound, these terminals  5  are not yet inserted into the corresponding connectors and are thus exposed; they are then referred to as “hanging” terminals. Accordingly, these terminals  5  are prone to deformation or damage. Moreover, when assembling the sub-harnesses (final bundling step), the “hanging” terminals must be inserted a posteriori into other sub-harnesses or a junction connector. Further, when the sub-harness electrical cables are to be connected to each other, a splicing process may become necessary. These processes therefore add up to a supplementary step. 
     FIG. 2 shows a commonly-used junction connector  6 . The junction connector  6  has a junction case  7  which contains junction bus bars  8 . In such a structure, after the sub-harnesses are assembled together, the electrical cables w to be joined are inserted into a counterpart connector  9 . The counterpart connector  9  is then fitted with the junction connector  6 , so that circuit connections can be established through the junction bus bars  8 . 
     In the above junction connector  6 , the “hanging” terminals  5  of the sub-harnesses are inserted into the counterpart connector  9 , which is in turn fitted with the junction connector  6 . This construction has the disadvantage of increasing the number of parts and process steps, thereby rendering automation more difficult, and leaving the “hanging” terminals prone to deformation up to the final bundling step. In addition, when an automobile type or automobile grade is changed, the corresponding circuits cannot be modified very easily. 
     SUMMARY OF THE INVENTION 
     The present invention intends to eliminate these shortcomings. The invention obviates later-stage insertion of the terminals and the splice connection between electrical cables, reduces the number of connectors, parts and assembling steps, and makes it possible to easily modify the circuits depending on automobile type or automobile grade. 
     To this end, the present invention first provides a connector terminal suitably used in a junction connector. 
     There is thus provided a connector terminal formed of an electrically conductive metallic material. The connector terminal includes a strip unit having a first end portion, a second end portion and a longitudinal center axis. The connector terminal further includes a cable-fit portion with a cable-fit element made by bending a part of the strip unit. The strip unit includes a male terminal portion located at the first end portion and a female terminal portion located at the second end portion. The male and female terminal portions are positioned on the longitudinal center axis, and the cable-fit element is placed apart from the male terminal portion and the female terminal portion. 
     Preferably, the female terminal portion includes a pair of looped ribbons made by looping side wing portions of the strip unit towards the longitudinal center axis, the looped ribbons being configured to elastically hold the male terminal portion. 
     Alternatively, the female terminal portion may include a notch formed along the longitudinal center axis and configured to receive the male terminal portion. 
     Likewise, the connector terminal may be formed of an electrically conductive metallic material, the connector terminal including a strip unit having a first end portion, a second end portion and a longitudinal center axis. The strip unit may include a male terminal portion located at the first end portion and a female terminal portion located at the second end portion. One of the male or female terminal portions may then include a notch formed along the longitudinal center axis and configured to receive an electrical cable. 
     The present invention also concerns a junction connector including at least a first junction case and a second junction case superposed thereon, each of the first and second junction cases having a top opening and a bottom opening, and containing electrical cables connected to the connector terminals formed of an electrically conductive metallic material. 
     As mentioned above, each of the connector terminals includes a strip unit having a first end portion, a second end portion and a longitudinal center axis, the connector terminal further includes a cable-fit portion with a cable-fit element made by bending a part of the strip unit. The strip unit includes a male terminal portion located at the first end portion and a female terminal portion located at the second end portion, the male and female terminal portions being positioned on the longitudinal center axis. The cable-fit elements are placed apart from the male terminal portion and the female terminal portion. 
     The first junction case is then superposed on the second junction case such that the male terminal portions contained in the first junction case fit into the female terminal portions contained in the second junction case and are connected thereto through the top and bottom openings. 
     In the above case, the female terminal portion may include a pair of looped ribbons made by looping side wing portions of the strip unit towards the longitudinal center axis, the looped ribbons being configured to elastically hold the male terminal portion. 
     Alternatively, the female terminal portion may include a notch formed along the longitudinal center axis and configured to receive the male terminal portion. 
     The present invention also concerns a junction connector including at least a first junction case and a second junction case superposed thereon, each of the first and second junction cases having a top opening and a bottom opening, and containing electrical cables connected to the connector terminals formed of an electrically conductive metallic material. 
     The connector terminal may include a strip unit having a first end portion, a second end portion and a longitudinal center axis, the strip unit including a male terminal portion located at the first end portion and a female terminal portion located at the second end portion. One of the male or female terminal portions includes a notch formed along the longitudinal center axis and configured to receive an electrical cable. 
     The first junction case is then superposed on the second junction case such that the male terminal portions contained in the first junction case fit into the female terminal portions contained in the second junction case and is connected thereto through the top and bottom openings. 
     In the above junction connector, the first and second junction cases may include arrays of connector terminals aligned at a given pitch, each array including a plurality of connector terminals which are fitted with a corresponding electrical cable wired along the array. 
     When connecting sub-harness electrical cables in each junction case, the present invention provides a method of wiring electrical cables in the junction connector, in which the junction connector and the connector terminals used are as described above. 
     The method of the present invention includes providing a preliminarily bundled sub-harness including electrical cables, looping the electrical cables, thereby forming two strands and a curved portion, fitting the two strands into cable-fitting portions of any arrays of connector terminals; and cutting off the curved portion so as to have two electrical cables connected. 
     The present invention also relates to a wire harness including a junction connector including at least a first junction case and a second junction case superposed thereon, each of the first and second junction cases having a top opening and a bottom opening, and containing electrical cables connected to the connector terminals formed of an electrically conductive metallic material. 
     As already mentioned, each of the connector terminals includes a strip unit having a first end portion, a second end portion and a longitudinal center axis, the connector terminal further including a cable-fit portion with a cable-fit element made by bending a part of the strip unit. The strip unit includes a male terminal portion located at the first end portion and a female terminal portion located at the second end portion. The male and female terminal portions are positioned on the longitudinal center axis, and the cable-fit element are placed apart from the male terminal portion and the female terminal portion. 
     As also already mentioned, the first junction case is then superposed on the second junction case such that the male terminal portions contained in the first junction case fit into the female terminal portions contained in the second junction case and is connected thereto through the top and bottom openings. 
     The inventive wire harness includes different sub-harnesses connected to one another through the connector terminals, any one of the sub-harnesses including a group of electrical cables connected to the connector terminals contained in the junction cases. Each sub-harness is connected to one of the junction cases, and the sub-harnesses are assembled by superposing the junction cases. 
     In the above wire harness, the first and second junction cases may include arrays of connector terminals aligned at a given pitch, each array including a plurality of connector terminals which are fitted with a corresponding electrical cable wired along the array. 
     In the above structure, an electrical cable can be electrically connected by merely press-fitting into one connector terminal. The connecting process can thus be automated easily. Further, the female terminal portion and the male terminal portion are formed either upwardly or downwardly, respectively, so that the entirety of the connector terminals and the electrical cables connected thereto can be connected to another entirety of connector terminals by merely superposing them. Furthermore, the female terminal portion and the male terminal portion are placed apart from the cable-fit portion, so that wiring of the electrical cables is easy and fitting of the latter with the cable-fit portion may be automated. 
     Preferably, the cable-fit notch is formed by notching a flat-shaped male terminal portion along the longitudinal center axis. 
     The structure of the connector terminal is thus simple. It nonetheless includes a cable-fit portion, and a male and a female terminal portion directed either upwardly or downwardly, respectively. The entirety of the connector terminals and the electrical cables connected thereto can thus be connected to another entirety of connector terminals by merely superposing them, as in the case of the first embodiment of the present invention. 
     As mentioned above, the connector terminals are aligned in each junction connector case, and several such cases are superposed. In this way, the connector terminals of a first and a second junction case are electrically connected by fitting the male terminal portion of the first junction case into the female terminal portions of the second junction case. In this configuration, electrical cable connections can be achieved by press-fitting the latter with chosen connector terminals. Any modifications in the circuitry, e.g. due to a change of automobile type or automobile grade, can thus be effected very easily. 
     As mentioned above, the electrical cables to be connected to different sub-harnesses are preliminarily connected to the connector terminals contained in respectively corresponding junction cases. When such junction cases are superposed, the male terminal portions of the connector terminals in a junction case fit into the female terminal portions of the corresponding junction case. The electrical cables of a sub-harness are thus connected to those of another sub-harness. Accordingly, subsequent insertion of terminals or a splicing process are no longer necessary. In addition, the sub-harnesses contain no “hanging” terminals, and can take the final configuration. The final bundling process can thus be simplified. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The above and the other objects, features and advantages of the present invention will be made apparent from the following description of the preferred embodiments, given as non-limiting examples, with reference to the accompanying drawings, in which: 
     FIG. 1 shows sub-harnesses that compose a harness known in the prior art; 
     FIG. 2 shows a wire harness, a junction connector and a counterpart connector known in the prior art; 
     FIG. 3A is an exploded perspective view of a junction connector according to a first embodiment of the present invention, showing separate junction cases; 
     FIG. 3B is a schematic view of the junction connector of FIG. 3A, when the separate junction cases are assembled; 
     FIG. 4A is a perspective view of a connector terminal contained in a junction case of FIG. 3A; 
     FIG. 4B is a perspective view of two connector terminals of FIG. 4A when they are superposed; 
     FIG. 4C is a side elevational view of two junction cases when they are superposed, such that the connector terminals of each junction case, together with the electrical cables, are connected; 
     FIG. 5A is a top plan view of a junction case; 
     FIG. 5B is a cross-sectional view of the junction case of FIG. 5A along line  5 B— 5 B of FIG.  5 A. 
     FIG. 5C is a bottom plan view of the junction case of FIG. 5A; 
     FIG. 6 is an enlarged view of a connector terminal when it is contained in a terminal enclosure of a junction case; 
     FIG. 7 is a perspective view showing how electrical cables are press-connected to connector terminals and installed in a junction case; 
     FIGS. 8A,  8 B and  8 C show different aspects of the connection between electrical cables and connector terminals; 
     FIG. 9 shows how a looped electrical cable is connected according to a second embodiment of the invention; 
     FIGS. 10A through 10D are perspective views of variants of the connector terminal; and 
     FIG. 11 is a schematic view showing how the electrical cables are connected to the connector terminals of FIGS.  10 C and  10 D. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     FIGS. 3A and 3B show a junction connector  10  according to the present invention, in which are superposed first and second junction cases  12 A and  12 B, respectively containing connecting terminals  11 . As shown in FIG. 3B, the junction cases  12 A and  12 B are respectively connected to corresponding sub-harnesses A and B, which are preliminarily bundled. The first and second junction cases  12 A and  12 B are superposed in the final bundling process. 
     In the above-mentioned process, only two junction cases  12 A and  12 B are connected to corresponding sub-harnesses A and B and then superposed. However, the number of junction cases may be more than two, so that the number of sub-harnesses can also be increased. 
     Among the electrical cables included in the sub-harnesses A and B supra, those to be connected to each other are wired in a junction case  12  of junction connector  10 , and press-connected preliminarily to the connector terminals  11  contained in the junction case  12 . 
     The connector terminals  11  are formed by stamping pieces out from a conductor metal sheet and configuring them, so as to form shaped pieces such as the one shown in FIG. 4A. A shaped piece includes a strip unit  11   a  and a shoulder unit  11   g  formed on the back thereof. The strip unit  11   a  includes a substantially rectangular strip, which extends from top (shoulder unit side) to bottom ends, and has a first and second face, and a longitudinal center axis. The bottom end of the strip unit  11   a  forms a male terminal  11   b  in the shape of a tab. Both lateral rims adjacent the top end of the strip unit  11   a  are provided with a respective first wing portion. These wing portions are rounded onto the first face of rectangular strip unit  11   a , opposing the second face where the shoulder unit is formed, towards the center axis of the strip unit  11   a , so as to form a pair of elastic holding portions  11   c  which serve as a female terminal  11   d.    
     The shoulder unit  11   g  is located on the second face of the strip unit, opposite the female terminal  11   d  and includes a cable-fit portion  11   f . The cable-fit portion  11   f  includes two second wing portions  11   h  which extend perpendicular to the strip unit plane. The second wing portions  11   h  include press-fit notches  11   e  formed from the top end thereof. The internal circular face of the press-fit notches is provided with a press-fit blade. 
     In the above-mentioned manner, the male terminal  11   b  and the female terminal  11   d  are arranged on the same center axis of the strip unit. Further, an electrical cable, when fitted into the cable-fit portion  11   f , is positioned at a distance S from the male and the female terminals  11   b  and  11   d.    
     As shown in FIGS. 4B and 4C, the connector terminals  11  are superposed such that the male terminals  11   b  of the upper connector terminals TA are inserted into the female terminals  11   d  of the lower connector terminals TB. 
     As shown in FIGS. 5A-5C, the junction case  12  ( 12 A or  12 B) is preliminarily mounted with the connector terminals  11 . The junction case  12  is in the form of a rectangular box including a peripheral wall  12   a , and top and bottom openings. The peripheral wall  12   a  has an upper wall unit  12   a - 2  and a lower wall unit  12   a - 1  which is larger than the former, thereby forming a wall step  12   a - 3 . First cable grooves  12   h  are formed widthwise, at a given pitch, along the length direction of the upper wall unit  12   a - 2 . Further, a horizontal partition wall  12   b  is formed at the level of the wall step  12   a - 3  inside the case  12 . The upper side of the horizontal wall  12   b  is further provided with short partition walls  12   c  arranged widthwise of the junction case  12  (X direction), and with long partition walls  12   d  arranged lengthwise thereof (Y direction). By virtue of this configuration, the junction case  12  includes a plurality of arrays of enclosures ( 8  arrays in the present embodiment) aligned widthwise (X direction), each array including two terminal-enclosures  12   e  arranged along the width direction. The junction case  12  thus includes  16  terminal-enclosures  12   e . Each terminal-enclosure  12   e  has an upper opening and a base (part of the horizontal partition wall  12   b ) with a terminal-hole  12   f , through which the male terminal  11   b  of the connector terminal  11  is passed. The short partition walls  12   c  are further provided with a respective step-shaped carrier  12   i  for the cable-fit portion  11   f.    
     In order to connect through the terminal-enclosures of each array, e.g. terminal-enclosures  12   e - 1  and  12   e - 2  of the first array, the long partition walls  12   d  are provided with a respective top end opening  12   g . The top end openings  12   g  are then linked to the first cable grooves  12   h  in the peripheral wall  12   a.    
     As shown in FIG. 6, an electrical cable passes through the two terminal-enclosures  12   e  of each array, and crosses above the cable-fit portion  11   f  of the connector terminal  11  contained in the terminal-enclosure  12   e . In the above connector terminal, the cable-fit portion  11   f  (more specifically, press-fit notch  11   e ) is placed at the same distance from either the male terminal  11   b  or the female terminal  11   d , so that the electrical cable can be placed in a position to be connected to the cable-fit portion  11   f  without interference from the male and female terminals  11   b  and  11   d.    
     A set of cases  12  is assembled as follows. The first junction case  12 A and the second junction case  12 B are preliminarily connected to the sub-harnesses A and the sub-harnesses B, respectively in the primary bundling process. Then, the first junction case  12 A is superposed on the second junction case  12 B in the final bundling process. The lower peripheral wall portion  12   a - 1  includes a first long side-wall and a second long side-wall parallel thereto. They have a given width which includes an upper half zone and a lower half zone. These zones further include a first end portion (e.g. right-hand side in FIGS. 3A and 7) and a second end portion (e.g. left-hand side in the same figures) distal thereto. The lower half zone of the first and second long side-walls is provided with second cable grooves  12   k  from its bottom rim, at a given pitch across the both long side-walls. Further, a knob portion  12   j  is provided on the first end portion of the upper half zone of the first long side-wall, as well as on the second end portion of its lower half zone. Likewise, a counterpart bracket portion  12   m  is provided on the second long side-wall, on the sites corresponding to those of the knob portions  12   j.    
     As schematically shown in FIGS. 7 and 8, the electrical cables w of the sub-harnesses A and B are wired in the junction cases  12 A and  12 B along the X direction thereof, so that they are passed through the terminal-enclosures  12   e  of each array. The electrical cables w are then pressed into the cable-fit portions  11   f  of the connector terminals  11  contained in the terminal-enclosures  12   e . In this manner, the electrical cables w are press-connected with the connector terminals  11 . 
     As shown in FIG. 3B, the junction case  12 A is connected to the electrical cables of sub-harness A, whilst the junction case  12 B is connected to the electrical cables of sub-harness B. The sub-harnesses A and B are manufactured separately. The junction cases  12 A and  12 B are superposed in the final bundling process. At this step, the lower wall unit  12   a - 1  of the first junction case  12 A is fitted over the upper wall unit  12   b - 1  of the second junction case  12 B. When superposing the first junction case  12 A on the second case  12 B, one of them is rotated horizontally by 180 degrees with respect to the other, so that the knob portion  12   j of first junction case  12 A, located in the lower half zone, is locked with the bracket portion  12   m  of second junction case  12 B, located in the upper half zone. The electrical cables w passing through the second junction case  12 B are then passed through the second cable grooves  12   k  of the first junction case  12 A. A lid  20  may be provided to close the top of the first junction case  12 A. 
     As shown in FIG. 3B, the junction case  12 A is connected to the electrical cables of sub-harness A, whilst the junction case  12 B is connected to the electrical cables of sub-harness B. The sub-harnesses A and B are manufactured separately. The junction cases  12 A and  12 B are superposed in the final bundling process. At this step, the lower wall unit  12   a - 1  of the first junction case  12 A is fitted over the upper wall unit  12   b - 2  of the second junction case  12 B. When superposing the first junction case  12 A on the second case  12 B, one of them is rotated horizontally by 180 degrees with respect to the other, so that the knob portion  12   j  of first junction case  12 A, located in the lower half zone, is locked with the bracket portion  12   m  of second junction case  12 B, located in the upper half zone. The electrical cables w passing through the second junction case  12 B are then passed through the second cable grooves  12   k  of the first junction case  12 A. A lid  20  may be provided to close the top of the first junction case  12 A. 
     When the first and second junction cases  12 A and  12 B are joined together, the male terminals  11   b  of the connector terminals  11  contained in the first junction case  12 A are passed through the terminal-holes  12   f , and fitted into the corresponding female terminals  11   d  of the connector terminals  11  contained in the second junction case  12 B. In this manner, the connector terminals  11  arranged on the same vertical axis of the first and second junction cases  12 A and  12 B become connected. 
     As a result, the chosen electrical cables in sub-harness A and those in sub-harness B can be electrically connected to each other through the corresponding connector terminals  11  in the first and second junction cases  12 A and  12 B. These chosen electrical cables in the sub-harnesses A and B can be preliminarily connected, at the primary bundling step, to the connector terminals  11  in the first and second junction cases  12 A and  12 B that form a junction connector  10 . Accordingly, “hanging” terminals otherwise exposed until the final bundling step can be avoided. Therefore, the sub-harnesses already secure a finalized configuration. 
     FIG. 9 shows a second embodiment of the invention in which, when electrical cables w of a sub-harness are connected to connector terminals  11  in a set of junction cases, the two electrical cables w are replaced by one looped electrical cable w′ having two strands w′-  1  and w′- 2 , and a curved portion w′- 3  bridging them. The looped cable w′ is passed through two adjacent arrays in the set of junction cases  12 , so that the two strands w′- 1  and w′- 2  are connected respectively with two arrays of connector terminals  11 . Thereafter, the curved portion w′- 3  is cut off, forming two electrical cables. When the looped electrical cables w′ are used, the number of cables leading to a junction connector  10  for connecting sub-harnesses is reduced to one half. 
     Further, as shown in the right-hand side of FIG. 9, distal, not adjacent, arrays may be used for chosen circuits. 
     FIGS. 10A to  10 D show a connector terminal  11  according to a variant embodiment. As shown in FIG. 10A, the position of the male terminals  11   b  and that of the female terminals  11   d  of the variant connector terminals  11  are reversed with respect to the connector terminals of FIG.  4 . In this embodiment, the male terminal  11   b  is formed in the shape of a tab at the top end portion of a strip unit  11   a , whereas the female terminals  11   d  having a pair of inwardly looped elastic holding portions  11   c  is formed on the bottom end portion thereof. A cable-fit portion  11   f  is formed on a vertically middle level of the strip unit  11   a  by bending side wing portions preliminarily provided in the strip unit  11   a.    
     A connector terminal  11  according to FIG. 10B includes a strip unit  11  a having two wings on its upper portion. The wings have a respective groove. The bottom end of the strip unit  11   a  forms a male terminal  11   b . The strip unit  11   a  is bent horizontally on a level just under the two wings, and then projects downwardly. The two wings are bent such as to be positioned over the horizontally bent strip unit  11   a , and form a cable-fit portion  11   f  with press-fit notches  11   e  and a tab-receiving groove  11   m  serving as a female terminal  11   d ′. The female terminal  11   d ′ is positioned such as to receive the male terminal  11   b  of an upper junction case. The female terminal  11   d ′ thus has a tab-receiving groove  11   m  suitable to be press-fitted by the male terminal  11   b . As the female terminal  11   d ′ has no elastic holding portion, it can be manufactured very easily. 
     The connector terminal  11  according to FIG. 10C has a male terminal  11   b  at the top portion of the strip unit  11   a  and a female terminal  11   d  at the bottom portion thereof. The top end of the male terminal  11   b  is vertically notched on the center axis, so as to form a cable-fit portion  11   f  with a press-fit notch  11   e . The male terminal  11   b  thus also serves as a cable-fit portion  11   f.    
     In the connector terminal  11  according to FIG. 10D, the female terminal  11   d  is vertically notched on the center axis, so as to form a cable-fit portion  11   f  with a press-fit notch  11   e . The female terminal  11   d  thus serves also as a cable-fit portion  11   f.    
     In the connecting terminals shown in FIGS. 10C and 10D, either the male terminal or the female terminal is provided with a press-fit notch  11   e . In this construction, the configuration of the connector terminal becomes very simple. In this case, however, the electrical cable w must be wired in a direction perpendicular to the arrays of the terminal-enclosures  12   e  arranged inside the junction case  12  (FIG.  11 ). 
     A connector terminal shown in FIGS. 10A to  10 D is connected to an electrical cable by press-fitting, so that the connecting process can be automated easily. Further, the male terminal group and the female terminal group are provided respectively at the first end portion (e.g. top portion) and at the second end portion (e.g. bottom portion) of the connector terminals. Electrical connections can thus be made simply by superposing both groups of connector terminals, so that connections of the cables wired on an upper level and on a lower level can be made very easily. These connector terminals can be used not only in junction connectors  10  shown in FIG. 3, but also as terminals for electrical connections in varieties of devices. 
     According to a junction connector of the present invention, its cases contain connector terminals, each of which include a cable-fit portion, and a male terminal portion located at one of either the top side or the bottom side of the connector terminal, and a female terminal portion located at the other side thereof. The electrical cables are then press-fitted into the connector terminals. Subsequently, the junction connector cases (e.g. a first case and a second case) are superposed to each other, so that the connector terminals are linked by the coupling of the male terminal portions of a first junction case and the female terminal portions of a second junction case. The electrical cables fitted into the first junction case can thus be connected to the electrical cables fitted into the second junction case. 
     In the past, some electrical cables in a sub-harness were connected by inserting terminals a posteriori, or by splice-connecting the cables to each other. These electrical cables can now be preliminarily connected to the connector terminals contained in the junction cases. These junction cases are then superposed and integrated to a junction connector in the final bundling process, so that the electrical cables in each sub-harness are connected to one another. As a result, later insertion of terminals into sub-harnesses can be avoided, and splice-connections of electrical cables can be obviated. As a whole, the efficiency of assembling the wire harness assembly is greatly improved. 
     As the connector terminals are preliminarily contained in the junction cases, circuits can be modified easily simply by changing press-fit positions between connector terminals and electrical cables. Therefore, changes of circuit configurations, e.g. to accommodate a different automobile type or grade, can be made very easily. Moreover, the junction cases containing the connector terminals have a wide use. 
     As a variant, sub-harness electrical cables connecting to the connector terminals in the junction cases may be in a looped shape forming two strands and a curved portion. The two strands are then connected to two arrays of connecting terminals, respectively, and the curved portion is cut off. In this manner, the number of electrical cables used for connecting to the junction connector can be reduced to one half. 
     Although the invention has been described with reference to particular means, materials and embodiments, it is to be understood that the invention is not limited to the particulars disclosed and extends to all equivalents within the scope of the claims. 
     The present disclosure relates to subject matter contained in priority Japanese Application No. HEI 11-212838, filed on Jul. 27, 1999.