Connection method of metal linear element and connection device of metal linear element

Abstract

A connection method for connecting metal linear objects facing each other includes disposing a pair of rotators with a space interposed therebetween. Each rotator including a pair of holding portions that are provided with a space interposed therebetween and that are able to hold the metal linear objects. The connection method also includes holding the vicinities of end portions of the metal linear objects at the holding portions of the rotators to hang the metal linear objects therebetween so that the vicinities of the end portions of the metal linear objects are overlapped with each other in an axis direction and rotating the rotators relatively in the opposite directions around between the pair of holding portions as a rotation center. As a result, the metal linear objects are twisted with each other between the rotators to perform connection.

1 . A connection method for connecting metal linear objects facing each other, comprising the steps of:
 disposing a pair of rotators with a space interposed therebetween, each rotator including a pair of holding portions which are provided with a space interposed therebetween and which are able to hold the metal linear objects;   holding the vicinities of end portions of the metal linear objects at the holding portions of the rotators to hang the metal linear objects therebetween so that the vicinities of the end portions of the metal linear objects are overlapped with each other in an axis direction; and   rotating the rotators relatively in the opposite directions around between the pair of holding portions as a rotation center, whereby the metal linear objects are twisted with each other between the rotators to perform connection.   
   
   
       2 . The connection method for connecting metal linear objects, according to  claim 1 ,
 wherein in the state in which the metal linear objects which are hung between the pair of rotators are restricted to move outside in the diameter direction, the rotators are rotated.   
   
   
       3 . A connection method for connecting metal linear objects facing each other, comprising the steps of:
 disposing a pair of rotators with a space interposed therebetween, each rotator including a pair of holding portions which are provided with a space interposed therebetween and which are able to hold the metal linear objects;   holding the vicinities of end portions of the metal linear objects, which are a main wire and a branch wire, at the holding portions of the rotators to hang the metal linear objects therebetween so that one metal linear object used as the main wire is disposed close to a rotation center side as compared to the other metal linear object used as the branch wire, and so that the vicinities of the end portions are overlapped with each other in an axis direction; and   in the state in which the metal linear objects which are hung between the pair of rotators are restricted to move outside in the diameter direction, rotating the rotators relatively in the opposite directions around between the pair of holding portions as the rotation center, whereby the metal linear objects are twisted with each other between the rotators to perform connection.   
   
   
       4 . The connection method for connecting metal linear objects, according to  claim 3 ,
 wherein a tensile load ratio of the main wire to the branch wire is set in the range from 10:3 to 10:6.   
   
   
       5 . The connection method for connecting metal linear objects, according to  claim 1 ,
 wherein as the holding portions of the rotators, slits are formed, each of which is opened at the outer circumference side of each rotator and is extended to the vicinity of the rotation center thereof, and by inserting the metal linear objects in the slits, the metal linear objects are held in the slits.   
   
   
       6 . The connection method for connecting metal linear objects, according to  claim 5 ,
 wherein the rotators have the slits as one type of holding portion and, as the other type of holding portion, through-holes through which the metal linear objects are allowed to pass.   
   
   
       7 . The connection method for connecting metal linear objects, according to  claim 1 ,
 wherein the metal linear objects comprise a material which generates plastic deformation.   
   
   
       8 . The connection method for connecting metal linear objects, according to  claim 1 ,
 wherein the two end portions of the two linear objects are applied with tensile resistance during twisting so as to perform uniform screwing.   
   
   
       9 . The connection method for connecting metal linear objects, according to  claim 1 ,
 wherein when the metal linear objects are element wires, a plurality of which is subsequently twisted together into a strand wire, the twisting direction while the end portions are connected to each other is set to coincide with the twisting direction when a strand wire is formed.   
   
   
       10 . The connection method for connecting metal linear objects, according to  claim 1 ,
 wherein when the metal linear objects are wires formed by twisting a plurality of element wires, the twisting direction while the end portions are connected to each other is set to coincide with the twisting direction of the element wires.   
   
   
       11 . The connection method for connecting metal linear objects, according to  claim 1 ,
 wherein after the metal linear objects are connected to each other by twisting, at least one extra length portion of the end portions which are not twisted together is removed by cutting.   
   
   
       12 . The connection method for connecting metal linear objects, according to  claim 11 ,
 wherein at least one of the end portions which are not twisted together is bent in the direction opposite to an introduction direction, and an extra length portion is cut off so as to leave a part thereof as a bent formation part.   
   
   
       13 . The connection method for connecting metal linear objects, according to  claim 1 ,
 wherein after the metal linear objects are twisted together, the twisted portion is annealed at 250 to 500° C. for 10 seconds or more.   
   
   
       14 . The connection method for connecting metal linear objects, according to  claim 1 ,
 wherein at a connection portion formed by twisting the metal linear objects together, the metal linear objects are tightly fixed to each other by a low-temperature melting soft metal.   
   
   
       15 . The connection method for connecting metal linear objects, according to  claim 1 ,
 wherein after the twisting is performed, a connection portion is plastic deformed by applying a compression force thereto.   
   
   
       16 . A connection device for connecting metal linear objects facing each other, comprising:
 a pair of second rotators which are rotatably provided around the same axis center, each having a pair of holding portions being capable of holding the metal linear objects and provided around the axis center;   a pair of first rotators engageable with teeth formed along the peripheries of the second rotators;   driven bevel gears to be rotated with the respective first rotators; and   a drive bevel gear engaged with the two driven bevel gears,   wherein by rotation of the drive bevel gear, the driven bevel gears are rotated in the opposite directions, the rotations thereof are transmitted to the second rotators through the first rotators, and the second rotators are rotated in the opposite directions, whereby end portions of the metal linear objects held by the holding portions are twisted between the second rotators.   
   
   
       17 . The connection device for connecting metal linear objects, according to  claim 16 ,
 further comprising a linear object restriction member for restricting the metal linear objects which are hung between the pair of second rotators to move outside in the diameter direction,   wherein the end portions of the metal linear objects are twisted together while being restricted to move outside in the diameter direction between the second rotators by the linear object restriction member.   
   
   
       18 . A connection device for connecting metal linear objects facing each other, comprising:
 a drive bevel gear to which a rotation force is applied;   a pair of driven bevel gears which are intersected with the drive bevel gear and are applied with the rotation force;   a pair of discs integrally bonded to the respective driven bevel gears;   a pair of first rotators to be concentrically and integrally rotated with the respective discs;   a pair of second rotators which are engaged with the respective first rotators, which are rotatably provided around the same axis center, and each of which have a pair of holding portions provided around the axis center and being capable of holding the metal linear objects; and   a linear object restriction member for restricting the metal linear objects which are hung between the pair of second rotators to move outside in the diameter direction,   wherein by rotation of the drive bevel gear, the driven bevel gears are rotated in the opposite directions, the rotations thereof are transmitted to the second rotators through the first rotators, and the second rotators are rotated in the opposite directions, whereby end portions of the metal linear objects are twisted together while being restricted by the linear object restriction member to move outside in the diameter direction between the second rotators.   
   
   
       19 . The connection device for connecting metal linear objects, according to  claim 16 ,
 further comprising an electric heating means which heats only a connection portion after the end portions of the metal linear objects are twisted together.   
   
   
       20 . The connection device for connecting metal linear objects, according to  claim 16 ,
 wherein as the holding portions, slits are formed, each of which is opened at the outer circumference side of each second rotator and is extended to the vicinity of the axis center, and by inserting the metal linear objects in the slits, the metal linear objects are held in the slits.   
   
   
       21 . The connection device for connecting metal linear objects, according to  claim 20 ,
 wherein the slits are each opened between teeth provided at the outer circumference side of each second rotator which are to be engaged with those of the corresponding first rotator.   
   
   
       22 . The connection device for connecting metal linear objects, according to  claim 16 ,
 wherein the first rotators are united with the respective driven bevel gears.   
   
   
       23 . The connection device for connecting metal linear objects, according to  claim 22 ,
 wherein the first rotators are concentrically united with the respective driven bevel gears with a space interposed therebetween.   
   
   
       24 . The connection device for connecting metal linear objects, according to  claim 16 ,
 wherein the second rotators are engaged with pairs of idle rotators located at the side opposite to the first rotators, and by the idle rotators, the second rotators are supported at the side opposite to the first rotators.   
   
   
       25 . The connection device for connecting metal linear objects, according to  claim 16 ,
 further comprising a spacer having a predetermined length dimension provided between the second rotators.   
   
   
       26 . The connection device for connecting metal linear objects, according to  claim 25 ,
 wherein the spacer is the linear object restriction member.   
   
   
       27 . The connection device for connecting metal linear objects, according to  claim 16 ,
 wherein the number of teeth of each first rotator is smaller than the number of teeth of each driven bevel gear.