Tension device and heat exchange fin manufacturing machine

Abstract

The tension device comprises: a feeding unit for feeding a band-shaped metal plate to a press unit; and a holding unit for applying tension to the band-shaped metal plate. The feeding unit is constituted by a moving member and a feeding pin. The front end of the feeding pin has a slope face so as to engage with a collared through-hole of the band-shaped metal plate when the moving member moves in a feeding direction of the band-shaped metal plate and so as to disengage therefrom when the moving member stops and moves in the reverse direction. The holding unit has a holding member, which holds and applies prescribed tension to the band-shaped metal plate when the moving member stops and which releases the band-shaped metal plate when the moving member starts to move in the feeding direction.

1 . A tension device,
 comprising:   a feeding unit for intermittently feeding a band-shaped metal plate to a press unit so as to form collared through-holes therein; and   a holding unit for applying tension to a part of the band-shaped metal plate located between the feeding unit and the holding unit when the press unit stops feeding the band-shaped metal plate to the press unit,   wherein the feeding unit is constituted by a moving member, which is capable of reciprocally moving in the longitudinal direction of the band-shaped metal plate, and a feeding pin, whose front end is biased toward the band-shaped metal plate by a biasing member provided in the moving member,   the front end of the feeding pin has a slope face so as to insert the front end of the feeding pin into the collared through-hole of the band-shaped metal plate and engage the same with an inner edge of the collared through-hole when the moving member moves in a feeding direction of the band-shaped metal plate and so as to disengage the front end of the feeding pin and exit the same from the collared through-hole when the moving member stops and moves in the reverse direction, and   the holding unit has a holding member, which contacts and holds the band-shaped metal plate so as to apply prescribed tension to the band-shaped metal plate when the moving member stops and which releases the band-shaped metal plate when the moving member starts to move in the feeding direction of the band-shaped metal plate.   
     
     
         2 . The tension device according to  claim 1 ,
 wherein the holding unit includes:   a cam member making the holding member contact the band-shaped metal plate to hold the band-shaped metal plate and making the holding member separate from the band-shaped metal plate to release the band-shaped metal plate; and   means for synchronously driving the cam member with operation of the press unit.   
     
     
         3 . The tension device according to  claim 2 ,
 wherein the moving member synchronously moves with operation of the press unit, and   the driving means of the holding unit is a servo motor.   
     
     
         4 . The tension device according to  claim 1 ,
 wherein the feeding unit is provided on the exit side of the press unit, and   the holding unit is provided on the entrance side of the press unit.   
     
     
         5 . The tension device according to  claim 1 ,
 wherein a fibrous member is provided on a contact face of the holding member, which contacts the band-shaped metal plate.   
     
     
         6 . A heat exchange fin manufacturing machine,
 comprising:   a press unit for forming collared through-holes in a band-shaped metal plate and cutting the band-shaped metal plate to form heat exchange fins having a prescribed length;   a tension device having a feeding unit for intermittently feeding the band-shaped metal plate to the press unit and a holding unit for applying tension to a part of the band-shaped metal plate located between the feeding unit and the holding unit when the press unit stops feeding the band-shaped metal plate to the press unit; and   a suction unit for feeding the heat exchange fins to a stacking unit,   wherein the feeding unit is constituted by a moving member, which is capable of reciprocally moving in the longitudinal direction of the band-shaped metal plate, and a feeding pin, whose front end is biased toward the band-shaped metal plate by a biasing member provided in the moving member,   the front end of the feeding pin has a slope face so as to insert the front end of the feeding pin into the collared through-hole of the band-shaped metal plate and engage the same with an inner edge of the collared through-hole when the moving member moves in a feeding direction of the band-shaped metal plate and so as to disengage the front end of the feeding pin and exit the same from the collared through-hole when the moving member stops and moves in the reverse direction, and   the holding unit has a holding member, which contacts and holds the band-shaped metal plate so as to apply prescribed tension to the band-shaped metal plate when the moving member stops and which releases the band-shaped metal plate when the moving member starts to move in the feeding direction of the band-shaped metal plate.