Abstract:
A wire is arranged on a base and pushed to the base with tips. Then, the tips are welded to the base while pushing the tips to the base, thereby to fix the wire to the base and conduct a wiring of the wire on the base in order. Firstly, these wire arranging process and tip welding process are applied to a wiring starting point of the wire, and then the next wire arranging process and tip welding process are applied to the next fixing point of the wire in order.

Description:
FIELD OF THE INVENTION 
     This invention relates to a wiring structure of wire and a wiring method in which the wire is arranged on and fixed to a base of insulation. 
     DESCRIPTION OF THE RELATED ART 
     A number of wires are arranged on a door and the like of a vehicle, so that the door can get functions such as power window system, door locking system and the like. 
     Utility model laid-open No. 5-46608 shows an earlier art of a wiring structure of wires. A door of a vehicle is provided with a base of insulation such as resin and wires are arranged on the base. The base is provided with a plurality of small wiring grooves on an upper surface thereof along a wiring route. The wires are laid in the wiring grooves for wiring. The wires are properly secured to the base with clamps and the like. 
     However, in the earlier art, it is needed to make the wiring grooves in the base along the wiring route. When there are a number of wiring routes, it is troublesome to make a large number of wiring grooves in the base. Besides, even if the wires are secured to the base with the clamps, it is difficult to obtain a certain fixation and it is unstable. 
     Further, when the base has a complicated structure in which the base is bent or raised at the middle portion thereof, it becomes very troublesome to arrange the wires and it is impossible to arrange the wires in manufacturing line. 
     SUMMARY OF THE INVENTION 
     It is therefore an object of the present invention to provide a wiring structure of wires and wiring method which can easily arrange wires, certainly fix the wires on a base, and perform a wiring process that arranges the wires on wiring routes which have three dimensional shapes. 
     To achieve an object of the present invention, there is provided with a wiring structure of wire, comprising: 
     a base; 
     a wire adopted to be arranged on the base; and 
     tips with which predetermined portions of the wire are pushed on the base, the tips adopted to be welded to the base. 
     With this structure, the wire is pinched between the tips and the base and the tips are welded to the base, so that the wire is fixed to the base due to the welded tips. Accordingly, it is possible to perform a wiring of the wire without forming a small recesses on the surface of the base. Moreover, the wire can be certainly fixed to the base without clamps for securing the wire to the base. 
     Preferably, each tip is formed with a recess which the wire fit into. With this structure, the wire can be certainly secured to the base. Accordingly, it is possible to perform a wiring process in which the wire is precisely placed on the base without a displacement of the wire at a welding of the tips. 
     Preferably, the base has a face, which the wire is arranged, comprising a plurality of steps which have various heights. Even if the face of the base has a complicated structure including a plurality of steps, the wiring of the wire can be easily performed because the wire is fixed with the tips. 
     From another aspect of the present invention, there is provided a wiring method of wire, comprising: 
     arranging a wire on a base; 
     pushing a predetermined portion of the wire on the base with a tip; and 
     welding the tip to the base while pushing the tip to the base, thereby to fix the wire to the base and conduct a wiring of the wire on the base. 
     In this wiring method of a wire, the tips are welded while arranging the wire on the base and the wire is fixed on the base due to the welding of the tips. Accordingly, it is possible to perform a wiring of the wire without forming a small recesses on the surface of the base. Moreover, the wire can be certainly fixed to the base. 
     Preferably, the arranging, pushing and welding processes are applied to a wiring start point of the wire to fix the wiring start point to the base, and then the next arranging, pushing and welding processes are applied to the next fixing point in order. 
     In this wiring method of a wire, a wiring start point of the wire is pushed to the base with the tips and fixed on the base by welding the tip to the base. Due to this fixation of the tips to the base, it can be avoided that the wiring start point of the wire comes off from the base and it is possible to smoothly perform the following wiring processes on the basis of the wiring start point of the wire. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 shows a base, tip and wiring tool adopted to an embodiment of the present invention; 
     FIG. 2 shows a state in which a wiring start point of the wire is arranged on the base and a tip is put on the wiring start point through the wiring tool; 
     FIG. 3 shows a state in which a tip of the wiring start point is pushed to the base and welded and the wire and the tip are put on the next fixing point; 
     FIG. 4 shows a state in which the following wiring processes are performed on a complicated face; 
     FIG. 5 shows a state in which the wiring of the wire has been performed on the base; and 
     FIG. 6 shows a state in which the wiring of the wire and a punching process has been performed. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     An embodiment of the present invention will be described with reference to the accompanying drawings. 
     Now referring to FIGS. 1 to  6 , a wire  5  is arranged on a base  6 . A covered wire, a bare wire, an enamel line and the like are used as the wire  5 . The base  6  is made of insulation such as resin. The base  6  is attached to a door panel, roof panel and the like of a vehicle after wiring of the wires  5 . For this attaching process, the base  6  is formed so as to match the shape of a member at a position where the base  6  is attached. 
     As shown in figures, the base  6  has a triangle shape and has the first step  7  at a middle portion thereof. The first step  7  is recessed from the remaining portion. The second and third steps  8  and  9  are arranged on the both side of the first step  7 . The third step  9  which is arranged on the right side in the figures has a lower position than the second step  8  which is arranged on the left side. Thus, the base  6  has a complicated three dimensional structure. 
     In this embodiment, a wiring tool  10  is used to arrange the wire  5  on the base  6 . Tips  12  are used to secure the wire  5  on the base  6  and an ultrasonic welder  11  is used to weld the tips  12  to the base  6 . The wiring tool  10  is provided with at the tip thereof a wire holding tube  13  which holds the wire  5 . The wiring tool  10  is controlled to move in its entirety in three dimensional directions while holding the wire  5 . With this three dimensional movement, the wiring tool  10  draws out the wire in order from a wire roll and arrange the wire  5  on the base  6 . 
     The ultrasonic welder  11  pushes the tip  12  on the base and is provided with ultrasonic horn  14  at the tip thereof. The horn  14  is used to apply ultrasonic vibration to the tip  12 . This ultrasonic welder  11  is controlled to move in its entirety in three dimensional directions as well. 
     In this embodiment, the ultrasonic welder  11  is to conduct an after treatment to the wire  5  arranged with the wiring tool  10  and to trace a locus of the wiring tool  10 . To realize these controls, the wiring tool  10  and the ultrasonic welder  11  are attached to six axes robot, which makes it possible to certainly move them with respect to the optional position of the base  6 . Thus, the wiring of the wires  5  is automatically conducted and a quick and labor saving wiring can be performed. 
     The tip  12  has a shape of small piece of insulation such as resin. The tip  12  is fused by the ultrasonic vibration and welded to the base  6 . For this reason, a insulation which is of the same homogenerous material as the base and has a good compatibility with the base  6  is used as the tip  12 . 
     The tip  12  fixes the wire  5  to the base  6  by fusing with the base  6  while the wire  5  is pushed on the base b. In this embodiment, the tip  12  is formed with a recess  15  at the bottom thereof. The recess  15  has a dimension similar to or slightly larger than the outside diameter of the wire  5  so that the wire  5  can fit into the recess  15 . By fitting the wire  5  into the recess  15 , the displacement of the wire  5  can be avoided and the wire  5  is secured on the base  6 . Accordingly, even if the ultrasonic welder  11  apply an ultrasonic vibration to the tip  12  to fuse the tip  12 , the displacement of the wire  5  due to the ultrasonic vibration can be avoided and the wire  5  can be certainly secured on a precise position. 
     Next, a wiring process of the wire  5  according to this embodiment will be described. As shown in FIG. 2, by moving the wiring tool  10  over the base  6 , the wiring tool  10  is positioned at the first fixing point (wiring start point) A that is a start point of wiring. Then the tip  12  is put on the wiring start point A of the wire  5 . A carrying robot carries the tip  12  to the wiring start point A. By putting the tip  12  on the wiring start point A of the wire  5 , the wire  5  fits into the recess  15  at the bottom of the tip  12 . 
     After that, as shown in FIG. 3, the ultrasonic welder  11  goes down to the wiring start point A of the wire  5  and pushes the tip  12  to the wiring start point A on the base  6 . Then, the ultrasonic horn  14  applies ultrasonic vibration to the tip  12  in the condition in which the tip  12  is pushed to the base  6 . With the application of the ultrasonic vibration, the contact portions of the tip  12  and the base  6  are fused so that the tip  12  is fixed to the base  6 , and thus the wire  5  between the tip  12  and base  6  is fixed to the base  6  at the wiring start point A. 
     With this fixation of the wiring start point A of the wire  5 , it is avoided that the wiring start point A of the wire  5  comes off from the fixed position. Thus, it is possible to smoothly conduct the wiring of the wire  5  after that on the basis of the wiring start point A. 
     In addition, when the tip  12  is small, the tip  12  is completely fused so that the wiring start point A of the wire  5  is fixed to the base  6 . Where the wire  5  is a covered wire, the insulation cover over the wire core is in contact with the base  6  and the tip  12 . The insulation cover is fused as well as the tip  12  so that the wire  5  is fixed to the base  6 . 
     After fixing the wiring starting point A as described above, the wiring tool  10  is moved to the second fixing point B on the second step  8  while drawing out the wire  5  (refer to FIG.  3 ). With respect to the second fixing point B, as well as the first fixing point A, the tip  12  is put on the base  6  and the ultrasonic welder  11  welds the tip  12  to the base  6 , so that the wire  5  is fixed to the second fixing point B of the base  6 . 
     After that, as shown in FIG. 4, the same process is conducted with respect to the third fixing point C, so that the wire  5  is fixed to the third fixing point C of the base  6 . Further, the same process is conducted with respect to the third step  9 , and thus the wire  5  is fixed to the base  6  in order. Consequently, with the process described above, even if the base  6  has a three dimensional complicated shape, the wiring and fixation of the wire  5  is certainly performed. 
     FIG. 6 shows the state in which a plurality of wires  5  have been fixed to the base  6  with the operation described above. In addition, the base  6  in FIG. 6 has a plurality of openings  16  which are formed through punching process on the predetermined portion. The opening  16  is used for example for securing the base  6  to some member such as a door of a vehicle. Through the punching process of the openings  16 , a single wire  5  is cut into a plurality of wire sections, so that it is allowed to form more electric circuits on the base  6 . 
     In addition, in FIG. 6, reference number  17  designates fixing points that are fixed to the base  6  through welding process with the tip  12  described above. Though the openings  16  are formed through punching process in FIG. 6, grooves may be formed for cutting the wires  5  into wire sections instead of the openings  16 . Otherwise, both of the openings  16  and the grooves may be formed.