Patent Publication Number: US-2010126752-A1

Title: Shield conductor

Description:
TECHNICAL FIELD 
     The present invention relates to a shield conductor. 
     Conventionally, a shield conductor disclosed in Patent Literature 1 which is mounted in an electric vehicle and electrically connects between equipments such as an inverter and a motor has been well-known. This shield conductor comprises multiple wires, a braided wire enwrapping the wires, and a corrugated tube enwrapping the wires and the braided wire. With the above configuration, the shield conductor can obtain flexibility in its entirety. And as a result, the shield conductor can be bent at a relatively small radius of curvature, and thereby being easily arranged even in a relatively narrow space such as an engine room. 
     [Patent literature 1]: Japanese Unexamined Patent Publication No. 2004-172476 
     DISCLOSURE OF THE INVENTION 
     However, in the above configuration where the wires are enwrapped by the corrugated tube, the radiation performance of the heat radiation from the wires is a problem. In short, according to the above configuration, an air layer exists between the wire and the braided wire, and between the braided wire and the corrugated tube. The heat conductivity of the air is relatively low, and this air layer therefore disturbs the heat radiation to the outside. As a result, the heat generated from the wires remains inside of the corrugated tube, and might cause a temperature rise of the wires. 
     In a case where the upper limit of the temperature rise value of the wires has already been decided, the heating value at the time of feeding electricity may be lowered by enlarging the diameter of the wire. However, this method causes the enlargement of the entire shield conductor, and cannot therefore be employed. 
     Considering the foregoing, there may be considered a method of enwrapping the outer circumference of multiple wires by a shielding layer, and housing the wires in a sleeve pipe, in which housing members capable of separately housing the wires enwrapped by the shielding layer are provided in a row. According to this configuration, the inner surface of the housing member of the sleeve pipe tightly adheres to the shielding layer, and moreover, the inner surface of the shielding layer tightly adheres to the wires. This enables heat generated from the wires to be transmitted from the wires to the sleeve pipe through the shielding layer, and then released from the sleeve pipe to the outside of the shield conductor. Accordingly, improved heat dissipation property of the shield conductor can be expected. 
     However, with the configuration of the sleeve pipe for housing the wires in a row, it is difficult to provide flexibility to the shield conductor. Considering the foregoing, there may be considered a method of connecting the sleeve pipe and the corrugated tube, and in a relatively large space, using the sleeve pipe, while in a relatively narrow space, using the corrugated tube. 
     However, the sleeve pipe, which has the housing members provided in a row for housing the wires, has a complicated shape and is therefore difficult to be rigidly fixed with the corrugated tube with a caulking ring. 
     This invention has been completed based on the above circumstances, and its purpose is to provide a shield conductor having heat dissipation property and flexibility. 
     The present invention relates to a shield conductor comprising: multiple wires; a shielding layer enwrapping the outer circumference of the wires while having flexibility; a sleeve pipe having multiple first housing members that are arranged in a row in the direction orthogonal to the axial direction of the wires and separately house the wires enwrapped by the shielding layer; a connecting member having multiple second housing members that are connected with each first housing member in the sleeve pipe and separately house the wires enwrapped by the shielding layer, while having a third housing member that is communicated with each second housing member and collectively houses the wires enwrapped by the shielding layer; and a corrugated tube connected with the third housing member in the connecting member and collectively housing the wires enwrapped by the shielding layer. 
     According to the present invention, using the connecting member allows the sleeve pipe provided with the housing members arranged in a row for housing the wires and the corrugated tube to be easily connected. This enables the wires and the shielding layer housed inside of the sleeve pipe to be arranged in a relatively large space, while in a relatively narrow space, enabling the wires and the shielding layer housed inside of the corrugated tube to be arranged. Consequently, the heat dissipation property of the shield conductor in a part using the sleeve pipe can be improved, while in a part using the corrugated tube, flexibility can be provided to the shield conductor. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a cross-sectional view showing a shield conductor according to the present embodiment; 
         FIG. 2  is a cross-sectional view taken along a line A-A in  FIG. 1 ; 
         FIG. 3  is a cross-sectional view taken along a line B-B in  FIG. 1 ; 
         FIG. 4  is a perspective view of a sleeve pipe; 
         FIG. 5  is a perspective view of a plate member; 
         FIG. 6  is an elevation view of the plate member; 
         FIG. 7  is a cross-sectional view showing a manufacturing process of the sleeve pipe; 
         FIG. 8  is a cross-sectional view showing the sleeve pipe; 
         FIG. 9A  is a cross-sectional view showing a state before a pin is inserted into an insertion hole; 
         FIG. 9B  is a cross-sectional view showing a state of the pin on the way to be inserted into an insertion hole; 
         FIG. 9C  is a cross-sectional view showing a state after the pin has been inserted into an insertion hole; 
         FIG. 10  is a plain view of a connecting member in a state connected with the sleeve pipe and the corrugated tube; 
         FIG. 11  is an exploded perspective view showing a half-split body; 
         FIG. 12  is a plain view showing the half-split body; 
         FIG. 13  is a cross-sectional view showing a connecting structure between the corrugated tube and the half-split body; 
         FIG. 14  is a perspective view of a bag member; 
         FIG. 15  is a cross-sectional view of the manufacturing process of the shield conductor, showing a state of the sleeve pipe fitted to the wire and the braided wire; 
         FIG. 16  is a cross-sectional view of a fitted-state of the bag member; 
         FIG. 17  is a cross-sectional view taken along a line C-C in  FIG. 16 ; 
         FIG. 18  is a cross-sectional view showing the fitting process of the corrugated tube; 
         FIG. 19  is a cross-sectional view showing a fitted-state of the corrugated tube; 
         FIG. 20  is a cross-sectional view showing the fitting process of the half-split body. 
     
    
    
     DESCRIPTION OF SYMBOLS 
     
         
         
           
               10  . . . shield conductor 
               11  . . . sleeve pipe 
               12  . . . braided wire (shielding layer) 
               13  . . . wire 
               16  . . . first housing member 
               40  . . . connecting member 
               41  . . . corrugated tube 
               42  . . . second housing member 
               44  . . . third housing member 
               49  . . . half-split body 
               50  . . . first arcuate part 
               51  . . . second arcuate part 
               53  . . . bag member 
               54  . . . heat conductive material 
           
         
       
    
     BEST MODE FOR CARRYING OUT THE INVENTION 
     In reference to  FIGS. 1 to 20 , one embodiment in which the present invention is applied to a shield conductor  10  is described. The present embodiment is mounted in, for example, a vehicle (not shown) such as an electric vehicle and a hybrid vehicle, and electrically connects between equipments such as a battery (not shown), an inverter device (not shown), and a motor (not shown). The shield conductor  10  is fitted to the vehicle by a holding member (not shown) such as, for example, a clamp. As shown in  FIG. 1 , the shield conductor  10  according to the present embodiment is constituted by enwrapping the outer circumference of multiple (three in the present embodiment) of wires  13  by a braided wire  12  (corresponding to a shielding layer), and housing the wires  13  enwrapped by the braided wire  12  inside of the sleeve pipe  11 , connecting member  40 , and the corrugated tube  41 . 
     (Wire) 
     As shown in  FIG. 4 , the wire  13  is constituted by enwrapping the outer circumference of a core wire  14  made of metal (for example, such as aluminum alloy and copper alloy) with an insulating coating  15  made of a synthetic resin. The wire  13  according to the present embodiment is a non-shielded type. Regarding the cross-sectional shape of the wire  13 , the cross-sectional shape of both the core wire  14  and the insulating coating  15  are a circular shape as shown in  FIG. 2 . Though not shown in details, the core wire  14  is composed of a twisted wire spirally twisting a plurality of thin wires or a rod-shaped single core wire. 
     (Braided Wire) 
     As shown in  FIG. 4 , the braided wire  12  forms a tubular shape as a whole. This braided wire  12  is constituted by weaving a metal thin wire into meshes. Three wires  13  are collectively enwrapped by the braided wire  12 . The braided wire  12  is capable of stretching in the radial direction as well as the length direction due to the flexibility of the metal thin wire. 
     (Sleeve Pipe) 
     As shown in  FIG. 1 , provided in the sleeve pipe  11  are the first housing members  16 , as extending in the axial direction of the wire  13  (in a direction from the left front side to the right back side in  FIG. 4 ). Each first housing member  16  is arranged in a row in a direction perpendicular to the extending direction of the wire  13  (in a direction from the right front side to the left back side in  FIG. 4 ) at intervals. Three wires  13  enwrapped by the braided wire  12  are separately housed in each first housing member  16  (see  FIG. 2 ). This allows each wire  13  to be housed in the sleeve pipe  11  in a row, in a direction perpendicular to the axial direction of the wire  13  at intervals. 
     As shown in  FIGS. 5 and 6 , the sleeve pipe  11  is formed by folding a plate member  17  made of synthetic resin. As a synthetic resin, for example, materials relatively having rigidity, such as polyethylene, polypropylene, PET, PBT, and nylon may be used. The plate member  17  is formed by a known method (for example, extrusion). As shown in  FIG. 5 , formed in the plate member  17  in a row in a direction from the right front side to the left back side are six grooves  18 . Each groove  18  is formed in a manner so as to extend from the left front side to the right back side in  FIG. 5 . As shown in  FIG. 6 , each groove  18  is formed in a manner so as to be recessed in some degree upwardly in  FIG. 6 , and its cross-sectional shape is semicircular. 
     In the plate member  17 , a folding member  19  for folding the plate member  17  is formed in the near-center in the right and left direction in  FIG. 6  in a manner so as to be recessed upwardly in  FIG. 6 . This folding member  19  is formed in a manner so as to extend along the extending direction of the groove  18  (in  FIG. 5 , from the left front side to the right back side). 
     As shown in  FIG. 8 , each groove  18  is formed in a position opposing each other when the plate member  17  is folded at the folding member  19 . Between the grooves  18  opposing each other, a spacing having a circular cross-sectional shape is formed. The wire  13  and the braided wire  12  are housed inside this spacing, and thus the above-mentioned first housing member  16  is constituted. The radius of the inner circumferential surface of the groove  18  is designed so as to be slightly smaller than the one obtained by adding the thickness of the braided wire  12  to the radius of the outer circumferential surface of the insulating coating of the wire  13 . 
     In the sleeve pipe  11 , an opposing wall  20  opposing each other is formed in both the right and left side of each first housing member  16  in  FIG. 8 . Among the opposing walls  20 , first opposing walls  20 A provided in the places closest to the right and left end of the sleeve pipe  11  in  FIG. 8  abut each other from above and below. In addition, among the opposing walls  20 , second opposing walls  20 B provided near the center in the right and left direction of the sleeve pipe  11  in  FIG. 8  oppose each other with a spacing therebetween, in a holding state of the braided wire  12  in between the opposing walls  20 . This spacing is designed so as to be slightly smaller than twice of the thickness of the braided wire  12 . 
     As shown in  FIG. 5 , multiple insertion holes  21  are formed in the opposing wall  20  along the extending direction of the first housing member  16  in a row at intervals, and penetrate through the opposing wall  20 . As shown in  FIG. 8 , the insertion hole  21  is formed in a position such that, when the plate member  17  is folded at the folding member  19 , the insertion hole  21  formed in the opposing wall  20  positioned upper side and the insertion hole formed in the opposing wall  20  positioned in the lower side correspond each other. This allows each insertion hole  21  to communicate vertically in  FIG. 8 , when the plate member  17  is folded at the folding member  19 . Inserted vertically into this insertion hole  21  is a pin  22  made of synthetic resin. Though described later in details, this pin  22  presses the inner circumference of the first housing member toward the outer circumference of the wire  13 . Additionally, the pin  22  inserted into the insertion hole  21  in near the center in the right and left direction in  FIG. 8  penetrates through gaps in the metal thin wires composing the braided wire  12 . 
     As shown in  FIG. 9A , the pin  22  comprises an shaft part  23  extending up and down in  FIG. 9A  and a flat part  24  positioned in the upper end of the shaft part  23  and forming a flat shape of a diameter larger than that of the shaft part  23 . In the shaft part  23 , from the position close to the lower end thereof, a pair of fall-out preventing pieces  25  is provided so as to extend diagonally upward left and upward right. The fall-out preventing piece  25  is capable of elastic deformation. 
     The shaft part  23  of the pin  22  inserted into the insertion hole  21  that is positioned near the both right and left ends of the sleeve pipe  11  in  FIG. 8  is designed so as to have a shorter height than that of the shaft part  23  of the pin  22  inserted into the insertion hole  21  that is positioned near the center in the right and left direction of the sleeve pipe  11 . 
     As shown in  FIG. 8 , with the pin inserted into the insertion hole  21  from up to down, the opposing walls  20  each other are held between the bottom surface of the flat part  24  of the pin  22  and the upper end of the fall-out preventing piece  25 , and thereby fixed in a vertically pressed-state by elastic repulsive force of the fall-out preventing piece  25 . This causes the groove  18  positioned upper side in  FIG. 8  to be pressed downwardly and forced on the upper half of the outer circumference of the wire  13 . On the other hand, the groove  18  positioned lower side in  FIG. 8  is pressed upwardly and forced onto the lower half of the outer circumference of the wire  13 . With this configuration, the inner circumference of the first housing member  16  constituted by the groove  18  is pressed toward the outer circumference of the wire  13 . Accordingly, the braided wire  12  is held between the inner circumference of the first housing member  16  and the outer circumference of the wire  13 , and thus, the inner circumference of the first housing member  16  adheres tightly to the braided wire  12 , while the braided wire  12  adheres tightly to the outer circumference of the wire  13 . 
     (Connecting Member) 
     As shown in  FIGS. 1 and 10 , one end of the connecting member  40  is connected with the end of the sleeve pipe  11 , while the other end is connected with the corrugated tube  41 . Formed in the end of the connecting member  40  in the side of the sleeve pipe  11  are three second housing members  42  in positions corresponding to three first housing members  16  in the sleeve pipe  11 . As shown in  FIG. 2 , the internal diameter of the second housing member  42  is designed so as to be nearly the same as the external diameter of the first housing member  16 . Each second housing member  42  is connected by being externally fitted onto the outer circumference of each corresponding first housing member  16 . As shown in  FIG. 2 , the wires  13  enwrapped by the braided wire  12  are separately housed inside of each second housing member  42 . Two joint parts  43  are formed between the adjacent second housing members  42 . The insertion hole  21  for inserting the above-mentioned pin  22  is formed in each joint part  43  so as to penetrate through the connecting member  40 . 
     In the end of the connecting member  40  in the side of the corrugated tube  41 , a third housing member  44  to be connected with the corrugated tube  41  is formed. As shown in  FIG. 3 , the wires  13  enwrapped by the braided wire  12  are collectively housed inside of the third housing member  44 . The internal diameter of the third housing member  44  is designed so as to be capable of externally fitting to the outer circumference of the corrugated tube  41 . On the inner circumferential surface of the third housing member  44 , in the right end in  FIG. 13 , a plurality (four in the present embodiment) of engagement ribs  45  capable of engaging with the corrugated tube  41  is provided, so as to protrude inwardly in the radial direction while extending in a circumferential direction of the third housing member  44 . The protruding height of the engagement rib  45  from the inner circumferential surface of the third housing member  44  is designed so as to be nearly the same as the difference between the heights of the protrusion  46  and the groove  47  in the later described corrugated tube  41 . 
     Three second housing members  42  are joined into one in the vicinity of the center in the right and left direction in  FIG. 12 , and the right side from this joint part is continued to the third housing member  44 . 
     As shown in  FIG. 12 , a pair of ears  48  protruding up and down is provided in both the up and down side fringes of the connecting member  40  in  FIG. 12 . In the ears  48 , a plurality of the insertion holes  21  for inserting the above-mentioned pin  22  is formed in a row at intervals so as to penetrate through the connecting member  40 . A step part  56  for receiving the opposing wall  20  in the sleeve pipe  11  is formed in the ear  48 . 
     As shown in  FIG. 11 , the connecting member  40  is constituted by vertically joining a pair of half-split bodies  49  made of synthetic resin. In the half-split body  49 , in the left end in  FIG. 12 , three first arcuate parts  50  of semicircular cross-section are formed in a row. In the half-split body  49 , in the right end in  FIG. 12 , one second arcuate part  51  of semicircular cross-section is formed. Joining a pair of the half-split bodies  49  in a vertically reversed state forms the connecting member  40 . 
     The first arcuate parts  50  are joined so as to form the second housing member  42 . Also, the second arcuate parts  51  are joined so as to form the third housing member  44 . 
     The pin  22  is inserted into the insertion hole  21  in a joined state of the half-split bodies  49 , so as to press the half-split bodies  49  from above and below and fix the same. The aspect of fixing the half-split bodies  49  with the pin  22  is the same as that of fixing the above-mentioned sleeve pipe  11 , so the explanation is omitted. 
     The hollow inside of three second housing members  42  and the hollow inside of the third housing member  44  communicate mutually, so that the wires  13  and the braided wire  12  can be arranged across from the second housing member  42  to the third housing member  44 . 
     (Corrugated Tube) 
     The corrugated tube  41  is made of synthetic resin, and constituted in an accordion shape in which a protrusion  46  protruding in the radial direction and arranged along the circumferential direction and a groove  47  recessed in the radial direction and arranged along the circumferential direction are alternately continued. With this accordion shape, the corrugated tube  41  is capable of elastic deformation at will. In the corrugated tube  41 , a split groove  52  along the length direction is formed across its entire length. The corrugated tube  41  can keep its cylindrical shape with the split groove  52  closed due to its elastic restoring force. 
     As shown in  FIG. 19 , three wires  13  enwrapped by the braided wire  12  are collectively housed inside of the corrugated tube  41 . Three wires inside of the corrugated tube  41  are arranged in a manner that the central axes of each wire  13  form nearly an equilateral triangle. 
     (Bag Member) 
     As shown in  FIG. 1 , a bag member  53  having flexibility and made of synthetic resin is housed inside of the corrugated tube  41 . The bag member  53  is arranged in a position between the braided wire  12  and the inner circumference of the corrugated tube  41 . The bag member  53  is hollow, and inside thereof is filled with a heat conductive material  54  having a heat conductivity higher than the air. As the heat conductive material  54 , any materials having a heat conductivity higher than the air may be used, such as liquid such as water and cooling oil, materials having viscosity such as silicon grease and glycerin, powder materials such as silica powder and alumina powder, and resin pellet. 
     As shown in  FIG. 14 , the bag member  53  forms a thin and long baglike shape. In the left front end of the bag member  53  in  FIG. 14 , a filling inlet  55  for filling the heat conductive material  54  into the bag member  53  is protrusively provided. After filling the heat conductive material  54 , the filling inlet  55  is sealed by, for example, heat sealing. The bag member  53  is capable of deformation at will when in a state filled with the heat conductive material  54  due to its flexibility. 
     The volume of the bag member  53  filled with the heat conductive material  54  is set to be larger than the one obtained by deducting the volume of the braided wire  12  and the wire  13  housed inside of the corrugated tube  41  from the capacity of the corrugated tube  41 . 
     As shown in  FIG. 3 , in a state where the third housing member  44  in the connecting member  40  is externally fitted to the outer circumference of the corrugated tube  41 , the inner circumference of the third housing member  44  presses the corrugated tube  41  radially inward thereof. The inner circumference of the corrugated tube  41  presses the bag member  53  radially inward of the corrugated tube  41 . As mentioned above, the bag member  53  has flexibility and therefore deforms so as to fill the clearance between the corrugated tube  41  and the braided wire  12 . This enables the bag member  53  to tightly adhere to the inner circumferential surface of the corrugated tube  41  and the outer circumferential surface of the braided wire  12 . As shown in  FIG. 1 , the length of the bag member  53  is designed to be longer than that of the corrugated tube  41 . In the bag member  53 , the portions sticking out from both the right and left ends of the corrugated tube  41  in  FIG. 1  are housed inside of the third housing member  44  in the connecting member  40 . 
     The bag member  53  is pressing the braided wire  12  radially inward of the corrugated tube  41 . Accordingly, the braided wire  12  having flexibility deforms so as to follow the shape of the outer circumference of the wire  13  as shown in  FIG. 3 . As a result, the braided wire  12  tightly adheres to the outer circumference of the wire  13 . 
     Next, a manufacturing method of the shield conductor  10  according to the present embodiment is described. Firstly, the plate member  17  is formed by extruding a synthetic resin as shown in  FIG. 5 . The insertion hole  21  formed in the opposing wall  20  may be shaped at the time of extrusion, or be shaped by punching with a jig not shown after forming the plate member  17 . 
     Next, as shown in  FIG. 7 , the wire  13  is run through inside of the braided wire  12 . After that, the plate member  17  is folded at the folding member  19  so as to hold the wire  13  and the braided wire  12 . 
     When the plate member  17  is folded at the folding member  19 , the first housing member  16  is formed by the grooves  18  formed in the plate member  17 . The plate member  17  is folded so as to separately house the wire  13  within this first housing member  16 . 
     After that, as shown in  FIG. 9B , the pin  22  is inserted into the insertion hole  21  in the opposing wall  20 . From above the insertion hole  21  that is vertically communicating, the pin  22  is pushed downwardly, with its flat part  24  faced upward. When the lower part of the shaft part  23  is inserted into the insertion hole  21 , the fall-out preventing piece  25  provided in a position closer to the lower end of the shaft part  23  is pressed by the inner circumferential surface of the insertion hole  21 , and thereby elastically deforming in the closing direction of a pair of the fall-out preventing pieces  25 . When the pin  22  is further pushed downwardly, a pair of the fall-out preventing pieces  25  deforms in a recovering manner in its opening direction. Then, the bottom surface of the flat part  24  of the pin  22  and the upper surface of the opposing wall  20  positioned upper side are abutted on each other from above and below, while the upper end of the fall-out preventing piece  25  and the bottom surface of the opposing wall  20  positioned lower side are abutted on each other from above and below (see  FIG. 9C ). This holds the opposing wall  20  between the flat part  24  and the fall-out preventing piece  25  in the pin  22 . The opposing wall  20  is pressed vertically in  FIG. 8  due to the elastic repulsive force of the fall-out preventing piece  25 . Accordingly, the plate member  17  is fixed in a prevented-state of opening deformation in up and down direction. 
     As shown in  FIG. 15 , the wires  13  extending from the end of the sleeve pipe  11  are arranged such that the axes of each wire  13  form a nearly equilateral triangle in a state enwrapped by the braided wire  12 . 
     On the other hand, the inside of the bag member  53  is filled with the heat conductive material  54  from the filling inlet  55  in the bag member  53 , and after that, the filling inlet  55  is sealed by for example heat sealing. The filling inlet  55  may be sealed by an adhesive. After that, as shown in  FIGS. 16 and 17 , the bag member  53  is arranged so as to enwrap the outer circumference of the wires  13  and the braided wire  12 . 
     As shown in  FIG. 18 , in a state where the bag member  53  is arranged on the circumference of the wires  13  and the braided wire  12 , a clearance occurs between the braided wire  12  and the bag member  53 . In this state, the split groove  52  in the corrugated tube  41  is opened so that the corrugated tube  41  is fitted in a manner so as to enwrap the outer circumference of the bag member  53 . Then, the split groove  52  closes due to the elastic restoring force of the corrugated tube  41 . As shown in  FIG. 19 , this causes the bag member  53  to deform due to the pressure from the inner circumferential surface of the corrugated tube  41 , the inner circumferential surface of the corrugated tube  41  and the bag member  53  to tightly adhere each other, and the bag member  53  and the outer circumferential surface of the braided wire to tightly adhere each other. Furthermore, the braided wire  12  and the outer circumferential surface of the wire  13  adhere tightly each other. 
     After that, as shown in  FIG. 20 , a pair of the half-split bodies  49  is combined from above and below in both the right and left ends of the corrugated tube  41  in  FIG. 20 . Here, three first arcuate parts  50  are externally fitted to the outer circumference of the corresponding first housing member  16 . 
     Meanwhile, the second arcuate part  51  is fitted to the outer circumference of the corrugated tube  41 . Here, the groove  47  in the corrugated tube  41  and the engagement rib  45  in the connecting member  40  are in a corresponding positional relationship. 
     In a combined state of the half-split bodies  49 , the pin  22  is inserted into the insertion hole  21  formed in the ear  48 . This pin  22  fixes the half-split bodies  49  by pressing from above and below in  FIG. 1 . Accordingly, the shield conductor  10  is completed. 
     According to the present invention, using the connecting member  40  enables the sleeve pipe  11 , in which housing members for housing the wires  13  are arranged in a row, and the corrugated tube  41  to be easily connected. This enables the wires  13  and the braided wire  12  to be housed inside of the sleeve pipe  11  for arrangement in a relatively large space, while in a relatively narrow space, enabling the wires  13  and the braided wire  12  to be housed inside of the corrugated tube  41 . Consequently, in the part using the sleeve pipe  11 , the heat dissipation property of the shield conductor  10  can be improved, while in the part using the corrugated tube  41 , the flexibility can be provided to the shield conductor  10 . 
     Also, according to the present embodiment, the connecting member  40  may be formed from the half-split bodies  49  of an identical shape, and thereby achieving a cost reduction in manufacturing. 
     In addition, according to the present embodiment, the hollow bag member  53  made of a material having flexibility is disposed between the corrugated tube  41  and the shielding layer, and the inside thereof is filled with the heat conductive material  54  of a heat conductivity higher than the air. This allows the heat dissipation property in a section in the shield conductor  10 , where the wires  13  and the braided wire  12  are housed in the corrugated tube  41 , to be improved. 
     Furthermore, as the bag member  53  has flexibility, the inner circumferential surface of the corrugated tube  41  presses and deforms the bag member  53 , so that the inner circumferential surface of the corrugated tube  41  and the bag member  53  come into a tight contact. And, as the braided wire  12  also has flexibility, the bag member  53  presses and deforms the braided wire  12 , so that the bag member  53  and the braided wire  12  come into a tight contact. Furthermore, being pressed by the bag member  53  causes the braided wire  12  to tightly adhere to the circumferential surface of the wire  13 . With this configuration, the heat generated from the wire  13  is transmitted sequentially from the outer circumferential surface of the wire  13 , to the braided wire  12 , the bag member  53 , and to the inner circumferential surface of the corrugated tube  41 , and then is released from the outer circumference of the corrugated tube  41  to the outside of the shield conductor. Consequently, the heat dissipation property of the area housed in the corrugated tube  41  in the shield conductor  10  can be further improved. 
     Other Embodiments 
     With embodiments of the present invention described above with reference to the accompanying drawings, it is to be understood that the invention is not limited to those precise embodiments, and the embodiments as below, for example, can be within the scope of the present invention. 
     (1) The braided wire  12  collectively enwraps multiple wires  13 , however, each wire  13  may be separately enwrapped by the braided wire  12 .
 
(2) In the present embodiment, the shield conductor  10  includes three wires  13 , however, the present invention is not limited to this, and multiple wires  13 , two or four and more, may be included.
 
(3) A pair of half-split bodies  49  composing the connecting member  40  may have different shapes.
 
(4) When the heating value of the wires  13  is relatively small, the bag member  53  may be omitted.
 
(5) In the present embodiment, the shielding layer is represented by the braided wire  12 , however, the present invention is not limited to this, and any materials having flexibility and shielding property, for example, such as an aluminum sheet material and a tape material may be used.
 
(6) In the present embodiment, the sleeve pipe  11  is constituted by folding one plate member  17 , however, the present invention is not limited to this, and the sleeve pipe  11  may be constituted by overlapping a pair of plate members. In this case, the pair of plate members may be made of the same synthetic resin, or, one plate member may be made of a synthetic resin, while the other be made of a metallic material.
 
(7) In the present embodiment, the connecting member  40  is formed by combining a pair of half-split bodies  49  made of the same synthetic resin, however, the present invention is not limited to this, and one half-split body  49  may be made of a synthetic resin, while the other be made of a metallic material.
 
(8) As means for composing the sleeve pipe  11  by fixing the plate member  17 , for example, a rivet may be used, and moreover, any members capable of pressing the inner circumference of the sleeve pipe  11  toward the outer circumference of the wire  13  may be used. Additionally, the plate member  17  may be combined and fixed with heat sealing or an adhesive.
 
     Like the above, as means for composing the connecting member  40  by fixing the half-split bodies  49  each other, for example, a rivet may be used, and moreover, any members capable of pressing the inner circumference of the connecting member  40  toward the outer circumference of the wire  13  may be used. Additionally, the half-split bodies  49  may be combined and fixed each other with heat sealing or an adhesive.