Rubber roller, and paper sheet take-out apparatus including the rubber roller

Abstract

A take-out roller which rotates and contacts a paper sheet supplied to a take-out position has an outer layer to contact the paper sheet and an inner layer provided inside the outer layer. The outer layer is made of relatively hard rubber material with a sufficient coefficient of kinetic friction. The inner layer is made of relatively soft non-foamed rubber material deformable by a relatively weak force. When the take-out roller contacts the paper sheet supplied to the take-out position in the inclined state, the inner layer is largely deformed, and the outer surface of the outer layer stably contacts the surface of the paper sheet.

1 . A rubber roller to rotate and contact a paper sheet, comprising: 
 an outer layer made of rubber material of JIS-A with the hardness over 35 Ha and below 90 Ha; and    an inner layer provided inside the outer layer, and made of non-foamed rubber material of JIS-A with the hardness over 5 Ha and below 25 Ha.    
   
   
       2 . The rubber roller according to  claim 1 , wherein the coefficient of kinetic friction of the outer surface of the outer layer is 1.0-1.5.  
   
   
       3 . The rubber roller according to  claim 1 , further comprising a barrier layer which is provided between the inner layer and outer layer, and prevents transfer of transfer components such as a plasticizer between the inner layer and outer layer.  
   
   
       4 . The rubber roller according to  claim 3 , wherein the barrier layer is made of rubber material having the index of solubility lower than the indexes of solubility of components transferred from the inner layer to the outer layer and from the outer layer to the inner layer.  
   
   
       5 . The rubber roller according to  claim 3 , wherein the barrier layer is made of resin such as ethylene resin terafluoride (PTFE), polyethylene (PE) and polypropylene (PP).  
   
   
       6 . A rubber roller comprising: 
 a substantially cylindrical roller body which is made of rubber material, has an outer surface to contact a paper sheet; and    a remover which is made soft by partially removing the roller body, to make the outer surface sufficiently contact a paper sheet by deforming the roller body to meet the state of a paper sheet to contact.    
   
   
       7 . The rubber roller according to  claim 6 , wherein the coefficient of kinetic friction of the outer surface is 1.0-1.5.  
   
   
       8 . The rubber roller according to  claim 6 , wherein the rubber material is JIS-A with the hardness over 35 Ha and below 90 Ha.  
   
   
       9 . The rubber roller according to  claim 6 , wherein the remover includes a circular groove formed by making the thickness of the roller body partially thin in the axial direction.  
   
   
       10 . The rubber roller according to  claim 6 , wherein the remover includes slits symmetrical with respect to an axis, penetrating through the roller body in the axial direction.  
   
   
       11 . The rubber roller according to  claim 10 , wherein the slits are extended and arranged spirally in the direction crossing the radial direction, so that the adjacent slits are at least partially overlapped in the radial direction of the roller, and the adjacent slits are parted by a wall extending in the direction crossing the radial direction and having substantially even thickness.  
   
   
       12 . The rubber roller according to  claim 6 , wherein the roller body has an outer layer which is mode of rubber material of JIS-A having the outer surface and having the hardness over 35 Ha and below 90 Ha, and an inner layer provided inside the outer layer and made of non-foamed rubber material softer than the outer layer, and 
 the remover is formed by partially removing the rubber material of the inner layer.    
   
   
       13 . The rubber roller according to  claim 12 , wherein the remover includes a circular groove formed by making the thickness of the inner layer partially thin in the axial direction.  
   
   
       14 . The rubber roller according to  claim 12 , wherein the remover includes slits symmetrical with respect to an axis, penetrating through the inner layer in the axial direction.  
   
   
       15 . The rubber roller according to  claim 14 , wherein the slits are extended and arranged spirally in the direction crossing the radial direction, so that the adjacent slits are at least partially overlapped in the radial direction of the roller, and the adjacent slits are parted by a wall extending in the direction crossing the radial direction and having substantially even thickness.  
   
   
       16 . The rubber roller according to  claim 12 , further comprising a barrier layer which is provided between the inner layer and outer layer, and prevents transfer of transfer components such as a plasticizer between the inner layer and outer layer.  
   
   
       17 . A paper sheet take-out apparatus comprising: 
 a supply mechanism which moves paper sheets stacked upright in a stacking direction, takes out the paper sheets sequentially from a paper sheet at one end of the stacking direction, and supplies the paper sheet to the take-out position; and    a rubber roller which rotates and contacts the paper sheet supplied to the take-out position, and takes out the paper sheet in the direction crossing the stacking direction, wherein    the rubber roller has an outer layer made of rubber material of JIS-A with the hardness over 35 Ha and below 90 Ha; and    an inner layer provided inside the outer layer, and made of non-foamed rubber material of JIS-A with the hardness over 5 Ha and below 25 Ha.    
   
   
       18 . The paper sheet take-out apparatus according to  claim 17 , wherein the coefficient of kinetic friction of the outer surface of the outer layer is 1.0-1.5.  
   
   
       19 . The paper sheet take-out apparatus according to  claim 17 , further comprising a barrier layer which is provided between the inner layer and outer layer, and prevents transfer of transfer components such as a plasticizer between the inner layer and outer layer.  
   
   
       20 . The paper sheet take-out apparatus according to  claim 19 , wherein the barrier layer is made of rubber material having the index of solubility lower than the indexes of solubility of components transferred from the inner layer to the outer layer and from the outer layer to the inner layer.  
   
   
       21 . The paper sheet take-out apparatus according to  claim 19 , wherein the barrier layer is made of resin such as ethylene resin terafluoride (PTFE), polyethylene (PE) and polypropylene (PP).  
   
   
       22 . A paper sheet take-out apparatus comprising: 
 a supply mechanism which moves paper sheets stacked upright in a stacking direction, takes out the paper sheets sequentially from a paper sheet at one end of the stacking direction, and supplies the paper sheet to the take-out position;    a take-out roller which rotates and contacts the paper sheet supplied to the take-out position, and takes out the paper sheet in the direction crossing the stacking direction; and    a separation mechanism having a feed roller which contacts a paper sheet taken out from the take-out position by the take-out roller, and rotates in the take-out direction, and a rubber roller which rotates following the feed roller by holding the taken-out paper sheet between the feed roller, and separates second and following paper sheets doubly taken out, by giving a reverse torque to the second and following paper sheets, wherein    the rubber roller has an outer layer made of rubber material of JIS-A with the hardness over 35 Ha and below 90 Ha; and    an inner layer provided inside the outer layer, and made of non-foamed rubber material of JIS-A with the hardness over 5 Ha and below 25 Ha.    
   
   
       23 . The paper sheet take-out apparatus according to  claim 22 , wherein the coefficient of kinetic friction of the outer surface of the outer layer is 1.0-1.5.  
   
   
       24 . The paper sheet take-out apparatus according to  claim 22 , further comprising a barrier layer which is provided between the inner layer and outer layer, and prevents transfer of transfer components such as a plasticizer between the inner layer and outer layer.  
   
   
       25 . The paper sheet take-out apparatus according to  claim 24 , wherein the barrier layer is made of rubber material having the index of solubility lower than the indexes of solubility of components transferred from the inner layer to the outer layer and from the outer layer to the inner layer.  
   
   
       26 . The paper sheet take-out apparatus according to  claim 24 , wherein the barrier layer is made of resin such as ethylene resin terafluoride (PTFE), polyethylene (PE) and polypropylene (PP).