Patent Publication Number: US-8122750-B2

Title: Cable hanger production system and production method

Description:
TECHNICAL FIELD 
     The present invention relates to a production system and a production method of a cable hanger used for bundling optical fiber cables such as optical collecting drop cables or wires such as various cables into one between electric poles. 
     BACKGROUND ART 
     Conventionally, a cable hanger is used for bundling wires such as optical fiber cables into one between electric poles. As a cable hanger of this kind, there is one called spiral hanger formed into a spiral shape (for example, see U.S. Pat. No. 5,727,777). 
     The cable hanger that is called spiral hanger is formed by winding a hanger wire into a coil shape in a constant direction. When a hung wire is extended between electric poles, one end of the cable hanger imports an end of the hung wire therein, the cable hanger is kept rotating in one direction along the spiral shape, the hung wire is taken therein and with this, the cable hanger is supported. 
     As the spiral cable hanger, there is proposed a cable hanger having largely enhanced operability. 
     This cable hanger is formed by alternately and continuously forming a Z-winding spiral and an S-winding spiral along an axis via a switching part instead of forming a spiral shape into a constant direction (see Japanese Patent Application Laid-open No. 2005-168284). 
     Therefore, when a hung wire is extended between electric poles, the cable hanger is disposed along the hung wire and then, any of switching parts of the cable hanger imports the hung wire therein, and it is kept rotating in one direction (e.g., rotated leftward) until it reaches a next switching part as it is. If it reaches the next switching part, the switching part imports the hung wire therein, and it is kept rotating in one direction (e.g., rotated rightward) until it reaches the next switching part as it is. By carrying out such a taking-in operation over the entire length of the hung wire, the hung wire can be taken in the cable hanger swiftly. 
     DISCLOSURE OF THE INVENTION 
     However, because the cable hanger must be formed by alternately and continuously forming the Z-winding spiral and the S-winding spiral using the hanger wire, a production system suitable for this has not yet been proposed. 
     The present invention has been achieved to solve the above problems, and it is an object of the invention to provide a production system and a production method of a cable hanger capable of alternately and continuously forming the Z-winding spiral and the S-winding spiral using a hanger wire. 
     In a cable hanger production system according to a first aspect of the present invention, a Z-winding spiral and an S-winding spiral are alternately and continuously formed along an axis via a switching part. A hanger wire is supplied from one end of a housing and sent out from the other end thereof. A plurality of spiral forming dice are accommodated in a cylindrical space in the housing such that the spiral forming dice are adjacent to each other and can rotate independently from each other. Each spiral forming die includes a bottom face forming a shape corresponding to a curvature of a spiral on a plane intersecting with an axis at right angles between an inner peripheral face of the housing and the bottom face, a Z-winding wall face forming a shape corresponding to a pitch of the Z-winding spiral inclined with respect to the plane, and an S-winding wall face forming a shape corresponding to a pitch of the S-winding spiral. The Z-winding wall face and the S-winding wall face intersect with each other at a central portion of the spiral forming die in its longitudinal direction. A region sandwiched between the Z-winding wall face and the S-winding wall face is constituted by the bottom face in front of and behind the intersection. 
     In a cable hanger production system according to a second aspect of the invention, a Z-winding spiral and an S-winding spiral are alternately and continuously formed along an axis via a switching part, the production system comprises a wire processing device including a housing having a cylindrical space in which a hanger wire is supplied from one end of the housing and the hanger wire is sent out from the other end thereof, and a plurality of spiral forming dice which are accommodated in the cylindrical space of the housing in adjacent to one another such that the spiral forming dice can be rotated by a motor independently from each other; and a wire supply device which is disposed in front of the wire processing device for supplying the hanger wire toward the one end of the wire processing device; the spiral forming dice are positioned by shifting from positions for forming the Z-winding spiral or S-winding spiral to positions for forming the S-winding spiral or Z-winding spiral by simultaneously rotating second and subsequent spiral forming dice with respect to the first spiral forming die as a reference as counted from the one end of the wire processing device, and by stopping the spiral forming dice from a front side; and a rotation velocity of each of the spiral forming dice by the motor is set to such a value that the spiral forming die rotates through a rotation angle required for shifting from the forming position of the Z-winding spiral or S-winding spiral to the forming position of the S-winding spiral or Z-winding spiral while the hanger wire supplied by the wire supply device moves from a front end to a rear end of the spiral forming dice. 
     In a production method according to a third aspect of the invention for forming a cable hanger in which a Z-winding spiral and an S-winding spiral are alternately and continuously formed along an axis via a switching part, a hanger wire is supplied from one end of a housing and sent out from the other end thereof, a plurality of spiral forming dice are accommodated in a cylindrical space of the housing such that the spiral forming dice are adjacent to each other and they can rotate independently from each other, the spiral forming dice are used; each of the spiral forming dice includes a bottom face forming a shape corresponding to a curvature of the spiral on a plane intersecting with the axis at right angles between inner peripheral face of the housing and the bottom face, a Z-winding wall face forming a shape corresponding to a pitch of the Z-winding spiral which is inclined with respect to the plane, and an S-winding wall face forming a shape corresponding to a pitch of the S-winding spiral, the Z-winding wall face and the S-winding wall face intersect with each other at a central portion of the spiral forming die in a longitudinal direction thereof, and a region sandwiched between the Z-winding wall face and the S-winding wall face is constituted by the bottom face, in the method; after a first step of inserting the hanger wire along the intersections into each of the spiral forming dice positioned at a location where the intersections are arranged along the axial direction is executed, the hanger wire is supplied from the one end and in this state, and second to fifth steps are repeated by predetermined times; the second step of positioning the spiral forming dice at locations where the Z-winding wall faces or S-winding wall faces are sequentially connected to each other; the third step of keeping the spiral forming dice in their positioned state and of forming the Z-winding spiral or S-winding spiral having a predetermined number of windings; the fourth step of shifting the spiral forming dice to locations where the S-winding wall faces or Z-winding wall faces are sequentially connected to each other; and the fifth step of keeping the spiral forming dice in their positioned state and of forming the S-winding spiral or Z-winding spiral having a predetermined number of windings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic plan view showing the entire structure of a cable hanger production system according to the present invention. 
         FIG. 2  are schematic perspective views of spiral forming dice which is combined as a wire processing device, and are explanatory diagrams sequentially showing rotating position of spiral forming dice when a Z-winding spiral is formed. 
         FIG. 3  is a front view of a stationary spiral forming die. 
         FIG. 4  is a plan view of the stationary spiral forming die. 
         FIG. 5  are a schematic plan view (a), a schematic front view (b), a schematic bottom view (c) and a schematic rear view (d) of spiral forming dice combined as a wire processing device, and show positions of the spiral forming dice when passing through a hanger wire. 
         FIG. 6  are a schematic plan view (a), a schematic front view (b), a schematic bottom view (c) and a schematic rear view (d) of the spiral forming dice combined as the wire processing device, and show positions of the spiral forming dice when forming a Z-winding spiral. 
         FIG. 7  are a schematic plan view (a), a schematic front view (b), a schematic bottom view (c) and a schematic rear view (d) of the spiral forming dice combined as the wire processing device, and show positions of the spiral forming dice rotated from the positions shown in  FIG. 6  through 90° for forming an S-winding spiral. 
         FIG. 8  are a schematic plan view (a), a schematic front view (b), a schematic bottom view (c) and a schematic rear view (d) of the spiral forming dice combined as the wire processing device, and show positions of the spiral forming dice further rotated from the positions shown in  FIG. 7  through 90°. 
         FIG. 9  are a schematic plan view (a), a schematic front view (b), a schematic bottom view (c) and a schematic rear view (d) of the spiral forming dice combined as the wire processing device, and show positions of the spiral forming dice further rotated from the positions shown in  FIG. 8  through 90°. 
         FIG. 10  are a schematic plan view (a), a schematic front view (b), a schematic bottom view (c) and a schematic rear view (d) of the spiral forming dice combined as the wire processing device, and show positions of the spiral forming dice further rotated from the positions shown in  FIG. 9  through 90°. 
         FIG. 11  are a schematic plan view (a), a schematic front view (b), a schematic bottom view (c) and a schematic rear view (d) of the spiral forming dice combined as the wire processing device, and show positions of the spiral forming dice further rotated from the positions shown in  FIG. 10  through 90°. 
         FIG. 12  are a schematic plan view (a), a schematic front view (b), a schematic bottom view (c) and a schematic rear view (d) of the spiral forming dice combined as the wire processing device, and show positions of the spiral forming dice further rotated from the positions shown in  FIG. 11  through 90°. 
         FIG. 13  are a schematic plan view (a), a schematic front view (b), a schematic bottom view (c) and a schematic rear view (d) of the spiral forming dice combined as the wire processing device, and show a state where a switching part is pulled out at the positions shown in  FIG. 11 . 
         FIG. 14  is a front view of an essential structure of a wire sending-out device. 
         FIG. 15  is a front view showing a structure of the wire processing device. 
         FIG. 16  is a right side view showing the structure of the wire processing device. 
         FIG. 17  is a transverse sectional plan view taken along the line XVII-XVII in  FIG. 16 . 
         FIG. 18  is a perspective view of an essential portion showing a pair of induction arc faces of a spiral forming guide provided on a rotating spiral forming die. 
         FIG. 19  is a time chart showing an operation of the rotating spiral forming dice and wire sending-out device. 
         FIG. 20  is an explanatory diagram showing a Z-winding spiral forming state and an S-winding spiral forming state by the spiral forming dice combined as the wire processing device. 
         FIG. 21  is a perspective view of a cable hanger in which a Z-winding spiral and an S-winding spiral are alternately and continuously formed along an axis through the switching part. 
         FIG. 22  is an explanatory diagram of the cable hanger shown in  FIG. 21  as viewed from the axial direction. 
         FIG. 23  is an explanatory diagram of a state where one of winder flanges of a winder drum is removed. 
     
    
    
     BEST MODE FOR CARRYING OUT THE INVENTION 
     Embodiments of the present invention will be explained with reference to the drawings. 
       FIG. 1  is a schematic plan view showing the entire structure of a cable hanger production system according to the present invention. The cable hanger production system  1  produces a cable hanger in which a Z-winding spiral and an S-winding spiral are alternately and continuously formed via a switching part along an axis. 
     The cable hanger production system  1  includes a wire supply device  40  and a wire processing device  10  disposed along a sending-out direction of a hanger wire  3  in this order from the front side. A cable hanger  5  which is processed and completed by the wire processing device  10  is reeled up around a winder device (winder drum)  72 . 
     An outline of a spiral forming operation carried out by the wire processing device  10  will be explained with reference to  FIGS. 2 to 13 . 
     The wire processing device  10  provides a housing  11  having a cylindrical space  12  (see  FIG. 5(   c )). The hanger wire  3  is supplied from one end of the housing  11  and is sent out from the other end thereof. A plurality of spiral forming dice  20  are accommodated in the space  12  adjacent to each other such that they can rotate independently from each other. 
     At least three spiral forming dice  20  are required. Four spiral forming dice  20  ( 20   a ,  20   b ,  20   c ,  20   d ) will be explained here. That is, a first spiral forming die  20   a , a second spiral forming die  20   b , a third spiral forming die  20   c  and a fourth spiral forming die  20   d  as counted from a hanger wire supply end of the housing  11  are used. 
     The first spiral forming die  20   a  is a stationary die fixed to the housing  11 , and the second to fourth spiral forming dice  20   b ,  20   c , and  20   d  are rotating dice supported around the axis such that they can rotate independently from each other. 
     The spiral forming dice  20  ( 20   a ,  20   b ,  20   c ,  20   d ) respectively include bottom faces  21  ( 21   a ,  21   b ,  21   c ,  21   d ) each forming a shape corresponding to a curvature of the spiral on a plane intersecting with the axis at right angles. 
     The spiral forming dice  20  ( 20   a ,  20   b ,  20   c ,  20   d ) respectively include Z-winding wall faces  22  ( 22   a ,  22   b ,  22   c ,  22   d ) for forming a shape corresponding to a pitch of a Z-winding spiral which is inclined with respect to the plane, and S-winding wall faces  23  ( 23   a ,  23   b ,  23   c ,  23   d ) for forming a shape corresponding to a pitch of an S-winding spiral. 
     In the second to fourth spiral forming dice  20   b ,  20   c , and  20   d , the Z-winding wall faces  22   b ,  22   c , and  22   d  and the S-winding wall faces  23   b ,  23   c , and  23   d  intersect with each other at a central portions of the second to fourth spiral forming dice  20   b ,  20   c , and  20   d  in the longitudinal direction. Regions sandwiched between the Z-winding wall faces  22   b ,  22   c , and  22   d  and the S-winding wall faces  23   b ,  23   c , and  23   d  in front of and behind the intersections  24   b ,  24   c , and  24   d  are constituted by bottom faces  21   b ,  21   c , and  21   d.    
     In the case of the first spiral forming die  20   a , in the right half of the drawing, like the second to fourth spiral forming dice  20   b ,  20   c , and  20   d , the Z-winding wall face  22   a  and the S-winding wall face  23   a  intersect with each other at the intersection  24   a . In the left half of the drawing of the spiral forming die  20   a , the Z-winding wall face  22   a  and the S-winding wall face  23   a  are not formed, an introduction portion extending in the axis is formed instead, and a left end of the introduction portion in the drawing is a hanger wire introduction opening  26 . 
     When the hanger wire  3  is inserted into the spiral forming dice  20   a ,  20   b ,  20   c , and  20   d , the intersections  24   a ,  24   b ,  24   c , and  24   d  of the spiral forming dice  20   a ,  20   b ,  20   c , and  20   d  are positioned at locations arranged along the axial direction (see  FIG. 2(   a ) and  FIG. 5) . 
     When the Z-winding spiral are formed, the Z-winding wall faces  22   a ,  22   b ,  22   c , and  22   d  of the spiral forming dice  20   a ,  20   b ,  20   c , and  20   d  are positioned at locations which are sequentially connected to each other (see  FIG. 2(   d ) and  FIG. 6) . 
     When the S-winding spiral are formed, the S-winding wall faces  23   a ,  23   b ,  23   c , and  23   d  of the spiral forming dice  20   a ,  20   b ,  20   c , and  20   d  are positioned at locations which are sequentially connected to each other (see  FIG. 13 ). 
     The positioning operation of the spiral forming dice  20   a ,  20   b ,  20   c , and  20   d  at the forming positions of the Z-winding spiral from the inserting positions of the hanger wire  3  is carried out by simultaneously rotating the second and subsequent spiral forming dice  20   b ,  20   c , and  20   d  with respect to the spiral forming die  20   a  as a reference, and by sequentially stopping the second to fourth spiral forming dice  20   b ,  20   c , and  20   d  from the front side (see  FIGS. 2(   a ) to ( d )). 
     Although not shown in the drawings, the spiral forming dice  20   a ,  20   b ,  20   c , and  20   d  are positioned at the forming positions of the S-winding spiral from the inserting positions of the hanger wire  3  in the same manner as that of the Z-winding spiral. 
     The second and subsequent spiral forming dice  20   b ,  20   c , and  20   d  are shifted from the forming positions of the Z-winding or S-winding spiral to the forming positions of the S-winding or Z-winding spiral when the switching part  25  is formed and then, the second to fourth spiral forming dice  20   b ,  20   c , and  20   d  are positioned. 
     The position shifting operation of the spiral forming dice  20   a ,  20   b ,  20   c , and  20   d  from the forming positions of the Z-winding spiral to the forming positions of S-winding spiral is carried out by simultaneously rotating the second and subsequent spiral forming dice  20   b ,  20   c , and  20   d  with respect to the reference first spiral forming die  20   a , and by sequentially stopping the spiral forming dice  20   b ,  20   c , and  20   d  from the front side (see  FIGS. 7 to 12 ). 
     Although not shown in the drawings, the position shifting operation of the spiral forming dice  20   a ,  20   b ,  20   c , and  20   d  from the forming positions of the S-winding spiral to the forming positions of the Z-winding spiral is carried out in the same manner as the position shifting operation from the Z-winding spiral to the S-winding spiral. 
     The rotation velocities of the second and subsequent spiral forming dice  20   b ,  20   c , and  20   d  are set to such values that the spiral forming dice  20   b ,  20   c , and  20   d  rotate through a rotation angle that is necessary to shift from the forming positions of the Z-winding or S-winding spiral to the forming positions of the S-winding or Z-winding spiral while the hanger wire  3  moves from front ends to rear ends of the spiral forming dice  20   b ,  20   c , and  20   d  (see  FIGS. 7 to 12 ). At this time, the rotation velocities of the spiral forming dice  20   b ,  20   c , and  20   d  are uniform velocities. 
     A method for forming an S-winding spiral after a Z-winding spiral wound by predetermined times as shown in  FIG. 2  will be explained here.  FIG. 6  show states where the spiral forming dice  20   a ,  20   b ,  20   c , and  20   d  are in the Z-winding spiral forming positions. 
     The spiral forming dice  20   b ,  20   c , and  20   d  which can rotate are rotated leftward from the positions shown in  FIG. 6  simultaneously at uniform velocities.  FIG. 7  show positions after the dice start and rotate through 90°. At this time, the bottom face  21   a  of the spiral forming die  20   a  and the bottom face  21   b  of the spiral forming die  20   b  face each other. The hanger wire  3  is sent along an axis through a central portion of the opposed bottom faces  21   a  and  21   b.    
       FIG. 8  show positions after the dice further rotate through 90° (180° after the starting position). At this time, the S-winding wall face  23   a  of the spiral forming die  20   a  and the S-winding wall face  23   b  of the spiral forming die  20   b  are connected to each other. At this position, the second spiral forming die  20   b  is stopped. The hanger wire  3  is located along the Z-winding wall faces  22   b ,  22   c , and  22   d  on the right side from the intersection  24   b  of the second spiral forming die  20   b , and is located along the S-winding wall faces  23   a  and  23   b  on the left side from the intersection  24   b . With this configuration, the switching part  25  is formed in the intersection  24   b  of the second spiral forming die  20   b.    
       FIG. 9  show positions after the dice further rotate through 90 (270° after the starting position). At this time, the bottom face  21   b  of the spiral forming die  20   b  and the bottom face  21   c  of the spiral forming die  20   c  face each other. The hanger wire  3  is sent until the switching part  25  is located at an upper end in the drawing in a boundary between the opposed bottom faces  21   b  and  21   c.    
       FIG. 10  show positions after the dice further rotate through 90° (360° after the starting position). At this time, the S-winding wall faces  23   a  and  23   b  of the spiral forming dice  20   a  and  20   b  and the S-winding wall face  23   c  of the spiral forming die  20   c  are connected to each other. In this position, the spiral forming die  20   c  is stopped. The hanger wire  3  is sent until the switching part  25  reaches the intersection  24   c  of the spiral forming die  20   c.    
       FIG. 11  show positions after the dice further rotate through 90° (450° after the starting position). At this time, the bottom face  21   c  of the spiral forming die  20   c  and the bottom face  21   d  of the spiral forming die  20   d  face each other. The hanger wire  3  is sent until the switching part  25  reaches the upper end in the drawing in the boundary between the opposed bottom faces  21   c  and  21   d.    
       FIG. 12  show positions after the dice further rotate through 90° (540° after the starting position). At this time, the S-winding wall faces  23   a ,  23   b , and  23   c  of the spiral forming dice  20   a ,  20   b , and  20   c  are connected to the S-winding wall face  23   d  of the spiral forming die  20   d . The spiral forming die  20   d  is stopped at this position. The hanger wire  3  is sent until the switching part  25  reaches the intersection  24   d  of the spiral forming die  20   d.    
     Lastly, the switching part  25  of the hanger wire  3  passes through the right end position of the bottom face  21   d  of the spiral forming die  20   d  and comes out from the wire processing device  10  (see  FIG. 13 ). 
     The cable hanger  5  is produced in the following manner. First, the spiral forming dice  20  ( 20   a ,  20   b ,  20   c ,  20   d ) are positioned at locations where the intersections  24  ( 24   a ,  24   b ,  24   c ,  24   d ) are arranged along the axial direction, and the hanger wire  3  is inserted into the spiral forming dice  20  ( 20   a ,  20   b ,  20   c ,  20   d ) along the intersections  24  ( 24   a ,  24   b ,  24   c ,  24   d ) from the hanger wire introduction opening  26  (see  FIGS. 2(   a ) and  5 ). 
     Next, the hanger wire  3  is supplied from the hanger wire introduction opening  26  and in this state, the spiral forming dice  20  ( 20   a ,  20   b ,  20   c ,  20   d ) are positioned at locations where the Z-winding or S-winding wall faces are sequentially connected to each other (see  FIGS. 2(   d ) and  6 ). 
     Next, the hanger wire  3  is supplied from the hanger wire introduction opening  26  and a state where the spiral forming dice  20  ( 20   a ,  20   b ,  20   c ,  20   d ) are positioned is maintained, and the Z-winding or S-winding spiral which is wound by predetermined times is formed (see  FIGS. 2(   d ) and  6 ). 
     Next, the hanger wire  3  is supplied from the hanger wire introduction opening  26  and in this state, the spiral forming dice  20  ( 20   a ,  20   b ,  20   c ,  20   d ) are shifted to positions where the S-winding or Z-winding wall faces are sequentially connected to each other and positioned (see  FIGS. 7 to 12 ). 
     Next, the hanger wire  3  is supplied from the hanger wire introduction opening  26  and a state where the spiral forming dice  20  ( 20   a ,  20   b ,  20   c ,  20   d ) are positioned is maintained, and the S-winding or Z-winding spiral which is wound by predetermined times is formed (see  FIG. 13 ). 
     The above operations are then repeated by predetermined times. 
     In the explanations of  FIGS. 5 to 13 , the spiral forming dice  20   a ,  20   b ,  20   c , and  20   d  are sequentially deviated from one another through 90° and the Z-winding wall faces  22   a ,  22   b ,  22   c , and  22   d  or the S-winding wall faces  23   a ,  23   b ,  23   c , and  23   d  are sequentially connected to each other, but the invention is not limited to this structure. That is, the spiral forming dice  20   a ,  20   b ,  20   c , and  20   d  can be deviated through any angle other than 90°, e.g., through angle θ, and the Z-winding wall faces  22   a ,  22   b ,  22   c , and  22   d  or the S-winding wall faces  23   a ,  23   b ,  23   c , and  23   d  can be sequentially connected to each other. 
     In the explanations of  FIGS. 5 to 13 , the first spiral forming die  20   a  is the stationary die and the second to fourth spiral forming dice  20   b ,  20   c , and  20   d  are the rotating dice but the invention is not limited to this. That is, the structure is not limited only if the first to fourth spiral forming dice  20   a ,  20   b ,  20   c , and  20   d  are deviated from one another by 90° (or angle θ) in one direction when the Z-winding spiral is formed and the spiral forming dice  20   a ,  20   b ,  20   c , and  20   d  are deviated from one another in the other direction by 90° (or angle θ) when the S-winding spiral is formed. With this configuration, if there is no problem in keep supplying the hanger wire  3  from the hanger wire introduction opening  26 , the first spiral forming die  20   a  can be the rotating die. In this case, the second spiral forming die  20   b , for example, can be the stationary die. 
     Next, a specific structure of each part of the cable hanger production system  1  will be explained. The cable hanger production system  1  includes the wire supply device (wire sending-out device)  40  and the wire processing device  10 . 
     The wire sending-out device  40  forcibly sends the hanger wire  3  which is continuously sent out from a wire drum (not shown) toward the wire processing device  10  through a wire guide  60 . As shown in  FIG. 14 , the wire sending-out device  40  includes a stationary upper sending-out belt  41  and a vertically movable lower sending-out belt  51  disposed below the upper sending-out belt  41  such as to be opposed thereto. 
     The stationary upper sending-out belt  41  is wound around a rear (right in the drawing) belt rolling ring  42  in the sending-out direction moving from left to right in  FIG. 14  and a front belt rolling ring (not shown) in an endless manner. A chain  47  wound around a driving sprocket  46  and a follower sprocket (not shown) supported by a base frame  45  is disposed between the rear belt rolling ring  42  and the front rolling ring. The chain  47  is provided with a support plate  48 . As the support plate  48  moves, the sending-out belt  41  is rotated. 
     The vertically movable lower sending-out belt  51  is wound around a rear (right in the drawing) belt rolling ring  52  and a front belt rolling ring in an endless manner. A chain  57  wound around a driving sprocket  56  and a follower sprocket (not shown) supported by a movable frame  55  is disposed between the rear belt rolling ring  52  and the front belt rolling ring. The movable frame  55  is vertically moved by a vertically moving hydraulic device  54 . The hydraulic device  54  includes a piston  54   a  and a cylinder  54   b . The chain  57  is provided with a support plate  58 . As the support plate  58  moves, the sending-out belt  51  is rotated. 
     A driving motor  49  which drives the driving sprocket  46  of the upper sending-out belt  41 , a driving motor  59  which drives a driving sprocket  56  of the lower sending-out belt  51  and the hydraulic device  54  which vertically moves the lower sending-out belt  51  are controlled based on commands from a control device  65 . When the lower sending-out belt  51  is in the lifted position (ON position) by the lifting operation of the hydraulic device  54 , the lower sending-out belt  51  is crimped onto the upper sending-out belt  41  under pressure. At this time, the crimping faces of the sending-out belts  41  and  51  are supported by the support plates  48  and  58 , and effect for strongly sandwiching the hanger wire  3  from above and below is generated. With this configuration, a sandwiching face  50  which is long in the longitudinal direction is secured, and the hanger wire  3  can be strongly and reliably sent out by the long sandwiching face  50  (in the direction of arrow A in  FIG. 14 ). 
     The wire guide  60  is formed into a cylindrical shape in which the hanger wire  3  can be guided, and the wire guide  60  is supported by a guide base  61 . A front end of the wire guide  60  is located adjacent to a sending out opening of the wire sending-out device  40 . A rear end of the wire guide  60  is located adjacent to the hanger wire introduction opening  26  of the wire processing device  10 . The wire guide  60  reliably guides the hanger wire  3  such that the hanger wire  3  which is forcibly sent out from the wire sending-out device  40  is not bent between the sending out opening and the hanger wire introduction opening  26  by a strong sliding resistance generated when the hanger wire  3  is sent into the wire processing device  10 . 
     The first to third rotating dice  20   b ,  20   c , and  20   d  are respectively for guiding the spiral up to 90°, for guiding the spiral up to 180° and for guiding the spiral up to 270°. 
     As shown in  FIGS. 16 ,  17 , and  18 , the first rotating die  20   b  is provided at its outer peripheral face with a spiral forming guide  31  and a ring-like meshing gear  34 . The first rotating die  20   b  having the spiral forming guide  31  and the meshing gear  34  are rotatably supported by a bearing  35  with respect to the die housing  11 . The meshing gear  34  is in mesh with a first driving gear  36  through an opening (not shown) formed in the die housing  11 . 
     The spiral forming guide  31  is a combination of a pair of opposed inclined guide faces  32  which incline forward, and a pair of opposed induction arc faces  33  provided inside the inclined guide faces  32 . 
     In  FIG. 18 , when the induction arc faces  33  and the inclined guide faces  32  are rotated in the direction of the arrow B and the hanger wire  9  is sent out as shown with the arrow C, the induction arc faces  33  and the inclined guide faces  32  form the spiral form. 
     In this case, the inclined guide faces  32  of the first rotating die  20   b  which can form the switching part (inverting part)  25  of the cable hanger  5  forms a shape which raises the switching part (inverting part)  25  outside the arc region as shown in  FIG. 22 . 
     Meanwhile, the meshing gear  34  meshes with the first driving gear  36  to which a rotation force is applied by a first die driving motor M 1  which can rotate normally and reversely. The rotation force from the first die driving motor M 1  is transmitted to the first rotating die  20   b  through the first driving gear  36  and the meshing gear  34 , and the first rotating die  20   b  is rotated normally or reversely. 
     The second and third rotating dice  20   c  and  20   d  have the same structure as that of the first rotating die  20   b . Normal and reversed rotation force is given to the second rotating die  20   c  by a second die driving motor M 2 , and normal and reversed rotation force is given to the third rotating die  20   d  by a third die driving motor M 3 . 
     The die housings  11  of the first to third rotating dice  20   b ,  20   c , and  20   d  are disposed on the same axis X with respect to the base housing  15 . 
     The die driving motors M 1 , M 2 , and M 3  of the first to third rotating dice  20   b ,  20   c , and  20   d  are controlled based on commands from the control device  65 . 
     The control device  65  outputs operation commands to the first to third rotating dice  20   b ,  20   c , and  20   d  and the wire sending-out device  40  based on a preset program.  FIG. 19  shows such a relationship. 
       FIG. 19  is a time chart showing a relation between normal and reverse rotations of the first to third rotating dice  20   b ,  20   c , and  20   d  and ON and OFF of the wire sending-out device  40 . 
     That is, the first to third rotating dice  20   b ,  20   c , and  20   d  normally rotate respectively through 90°, 180°, and 270° under a condition that a state where the spiral forming guides  31  are arranged on the same axis X as that of the hanger wire introduction opening  26  is defined as 0°. Next, the first to third rotating dice  20   b ,  20   c , and  20   d  rotate in the opposite side (reversely rotate) beyond 0° at which the first to third rotating dice  20   b ,  20   c , and  20   d  are arranged on the same axis X. The first to third rotating dice  20   b ,  20   c , and  20   d  alternately repeat the normal rotation and reverse rotation. 
     This will be specifically explained based a definition that rightward rotation is called plus side and leftward rotation is called minus side. 
     The first rotating die  20   b  starts from 0° and (normally) rotates rightward (plus side) by +90°. Next, the first rotating die  20   b  returns from the position of +90° to 0° and (reversely) rotates leftward (minus side) by −90°. The first rotating die  20   b  then returns from the position of −90° to 0° and again (normally) rotates rightward (plus side) by +90°. The first rotating die  20   b  repeats these operations alternately. 
     The second rotating die  20   c  starts from 0° and (normally) rotates rightward (plus side) by +180°. Next, the second rotating die  20   c  returns from the position of +180° to 0° and (reversely) rotates leftward (minus side) by −180°. The second rotating die  20   c  then returns from the position of −180° to 0° and again (normally) rotates rightward (plus side) by +180°. The second rotating die  20   c  repeats these operations alternately. 
     The third rotating die  20   d  starts from 0° and (normally) rotates rightward (plus side) by +270°. Next, the third rotating die  20   d  returns from the position of +270° to 0° and (reversely) rotates leftward (minus side) by −270°. The third rotating die  20   d  then returns from the position of −270° to 0° and again (normally) rotates rightward (plus side) by +270°. The third rotating die  20   d  repeats these operations alternately. 
     On the other hand, the wire sending-out device  40  is once turned ON (crimping and sending out state) at the start position, and the ON state is continued for a constant time even after rotating operations of the first to third rotating dice  20   b ,  20   c , and  20   d  by 90°, 180°, and 270° are completed. The wire sending-out device  40  is turned OFF and then, is again brought into the ON state (crimping and sending out state). The wire sending-out device  40  repeats the ON and OFF operations. 
     A relationship between the wire sending-out device  40  and the first to third rotating dice  20   b ,  20   c , and  20   d  at the time will be explained with reference to  FIG. 20 . 
     In an ON region where the wire sending-out device  40  is turned ON (crimping and sending out state) simultaneously with start, the first to third rotating dice  20   b ,  20   c , and  20   d  (normally) rotate to positions of +90°, +180°, and +270°, respectively. With this configuration, right-handed spiral guide R-G to 270° is formed by spiral forming guides  31  of the first to third rotating dice  20   b ,  20   c , and  20   d  as shown in  FIG. 20 . By forcibly sending the hanger wire  3  along the right-handed spiral guide R-G, a right-handed spiral portion  5 -R having a predetermined number of windings is obtained. 
     In a next ON region where the wire sending-out device  40  is once turned OFF and is again turned ON (crimping and sending out state), the first to third rotating dice  20   b ,  20   c , and  20   d  (reversely) rotate to positions of −90°, −180°, and −270°, respectively. With this configuration, a left-handed spiral guide L-G to 270° is formed by spiral forming guides  31  of the first to third rotating dice  20   b ,  20   c , and  20   d  as shown in  FIG. 20 . By forcibly sending the hanger wire  3  along the left-handed spiral guide L-G, a left-handed spiral portion  5 -L having a predetermined number of windings is obtained. 
     Although the right-handed rotation of the first to third rotating dice  20   b ,  20   c , and  20   d  is defined as normal rotation and the left-handed rotation thereof is defined as reverse rotation in the above explanations, left-handed rotation can be defined as normal rotation and right-handed rotation can be defined as reverse rotation. To form smooth spiral guides, four combined dice including the stationary die  20   a  and the first to third rotating dice  20   b ,  20   c , and  20   d  is employed in the above explanations. However, three combined dice including the stationary die  20   a  and the first and second rotating dice  20   b  and  20   c  can also be employed. 
     The wire sending-out device  40  is in a state where the movable sending-out belt  51  is lowered with respect to the stationary sending-out belt  41  in the OFF region, and the sandwiching state of the hanger wire  3  is released. This OFF period is 1 to 2 seconds. With this configuration, when the hanger wire  3  enters into the next left-handed spiral portion  5 -L from the right-handed spiral portion  5 -R, the sandwiched state of the hanger wire  3  can be released temporarily, and torsion reaction force can be released temporarily. 
     The wire sending-out device  40  can also alternately and continuously form the right-handed spiral portion  5 -R and the left-handed spiral portion  5 -L even without providing the OFF period in which the sandwiching state of the hanger wire  3  is released and in the ON state (crimping and sending out state) in which the sending out operation is continued. Even when the number of windings of the right-handed spiral portion  5 -R and the number of windings of the left-handed spiral portion  5 -L are relatively small as about 2.0 windings (about 1.5 to 2.5 windings), it is possible to produce the cable hanger  5  having a sufficient quality. 
     A cable hanger taking-out device  70  includes a cable hanger support member  71  having a predetermined length provided on the third rotating die  20   d , and a winder drum  72  which reels up the cable hanger  5  as a product. 
     The cable hanger support member  71  is formed into a cylindrical shape which is integrally mounted on a central shaft of the third rotating die  20   d , and rotates integrally with the third rotating die  20   d . Therefore, the cable hanger  5  sent out from the third rotating die  20   d  is supported by the cable hanger support member  71  over a predetermined length without falling on the ground and then, the cable hanger  5  is reeled up around the winder drum  72 . 
     The winder drum  72  includes a pair of left and right winder flanges  73 , a winder barrel  74  located between the winder flanges  73 , and a plurality of projecting portions  75  formed on a periphery of the winder barrel  74  at predetermined distances from one another in the radial direction. The projecting portions  75  project radially outward over substantially entire length of the winder barrel  74 . When the cable hanger  5  is reeled up around the winder barrel  74  of the winder drum  72 , the right-handed spiral portion  5 -R or the left-handed spiral portion  5 -L is extended in a corrugate form as shown in  FIG. 23  and the cable hanger  5  is reeled up in an unstable state. At this time, if the switching part (inverting part)  25  located at junction between the right-handed spiral portion  5 -R and the left-handed spiral portion  5 -L is locked to the projecting portions  75 , the cable hanger  5  can be stabilized and reliably reeled up. 
     One of the left and right winder flanges  73  is detachably mounted on the winder barrel  74 . When the winder flange  73  is detached, the winder barrel  74  is exposed and the cable hanger  5  can easily be detached from the winder barrel  74 . 
     A production method of the cable hanger  5  by the cable hanger production system  1  will be explained. First, as shown in  FIG. 1 , the spiral forming guides  31  of the first to third rotating dice  20   b ,  20   c , and  20   d  are set on the same axis X as the hanger wire introduction opening  26 . The hanger wire  3  which is continuous in the longitudinal direction is inserted into the spiral forming guides  31  from the hanger wire introduction opening  26 . Next, the wire sending-out device  40  is brought into the ON state, the hanger wire  3  is sent out and at the same time, the first to third rotating dice  20   b ,  20   c , and  20   d  are rotated rightward to the positions of +90°, +180°, and +270°, respectively. With this configuration, the hanger wire  3  forms the right-handed spiral up to 270°. At this time, the right-handed spiral guide R-G is formed by the first to third rotating dice  20   b ,  20   c , and  20   d . Therefore, the right-handed spiral portion  5 -R having a predetermined number of windings can be obtained by forcibly keeping sending the hanger wire  3  continuously for a constant time. 
     Next, the sandwiching state of the hanger wire  3  is temporarily released and the torsion reaction force is released. The hanger wire  3  is again sent out, and at the same time, the first to third rotating dice  20   b ,  20   c , and  20   d  are rotated leftward to positions of −90°, −180°, and −270° beyond 0°, respectively. With this configuration, the hanger wire  3  forms the left-handed spiral until 270° through the switching part (inverting part)  25 . At this time, the left-handed spiral guide L-G is formed by the first to third rotating dice  20   b ,  20   c , and  20   d . Therefore, the left-handed spiral portion  5 -L having a predetermined number of windings can be obtained by forcibly keeping sending the hanger wire  3  continuously for a constant time. 
     By repeating the above operations, the cable hanger  5  in which the right-handed spiral portion  5 -R and the left-handed spiral portion  5 -L are alternately continued along the axial direction through the switching part (inverting part)  25  can be obtained as shown in  FIG. 21 . 
     At the time of the series of spiral forming operation, strong sliding resistance is created in the hanger wire  3  by the spiral forming guides  31  when the hanger wire  3  is sent out by the wire sending-out device  40 . However, because the hanger wire  3  is guided by the wire guide  60  from the wire sending-out device  40  to the hanger wire introduction opening  26 , the hanger wire  3  can smoothly be sent out reliably without being bent. 
     In this case, it is preferable to provide the hanger wire introduction opening  26  with an oil reservoir to reduce the sliding resistance, and to create the lubricating effect in the hanger wire  3  to reduce the insertion resistance. 
     INDUSTRIAL APPLICABILITY 
     The present invention provides a production system for producing a cable hanger in which a Z-winding spiral and an S-winding spiral are alternately and continuously formed along an axis via a switching part. A hanger wire is supplied from one end of a housing and sent out from the other end thereof. A plurality of spiral forming dice are accommodated in a cylindrical space in the housing such that the spiral forming dice are adjacent to each other and can rotate independently from each other. Each spiral forming die includes a bottom face forming a shape corresponding to a curvature of a spiral on a plane intersecting with an axis at right angles between an inner peripheral face of the housing and the bottom face, a Z-winding wall face forming a shape corresponding to a pitch of the Z-winding spiral inclined with respect to the plane, and an S-winding wall face forming a shape corresponding to a pitch of the S-winding spiral. The Z-winding wall face and the S-winding wall face intersect with each other at a central portion of the spiral forming die in its longitudinal direction. A region sandwiched between the Z-winding wall face and the S-winding wall face is constituted by the bottom face in front of and behind the intersection. Using the hanger wire, the Z-winding spiral and S-winding spiral can be formed alternately and continuously.