Bobbin Fixing Device and Bobbin Removing Device

Abstract

The present invention provides a bobbin fixing device capable of fixing a bobbin easily with a simple structure and also provides a bobbin removing device capable of removing a bobbin readily with a simple structure. Stoppers 35 project from the level of the outer surface of a rotating shaft 23 . Sloping surface of each stopper 35 is pressed by a bobbin 10 , so that the stopper is moved to an inner position P 2 . The bobbin 10 is attached so as to position on a positioning member 25 . When the bobbin 10 is brought into contact with the positioning member 25 , each support 34 B upwardly moves together with a release button 32 biased by a spring 33 , so that one end of each arm 34 A on the associated support 34 B moves upward and the other end thereof close to the associated stopper 35 moves downward. Thus, each stopper 35 outwardly moves and projects until a restricting face 35 C of the stopper 35 is brought into contact with the bobbin 10 . At that time, a retaining face 35 B of each stopper 35 is in contact with the top surface of the bobbin 10 , thus restricting the movement of the bobbin 10 in the direction (Y direction) in which the bobbin 10 is removed from the rotating shaft 23.

1 . A bobbin fixing device comprising:
 a rotating shaft to which a bobbin is attached;   a positioning member which is in contact with a first surface of the attached bobbin to position the bobbin in the attaching direction in which the bobbin is attached to the rotating shaft; and   movable members, each of which is movable between a projecting position where the member projects from the level of the outer surface of the rotating shaft and an inner position inside the level of the outer surface and is in contact with a second surface of the attached bobbin in the projecting position to restrict the movement of the bobbin in the removing direction in which the bobbin is removed from the rotating shaft.   
   
   
       2 . The bobbin fixing device according to  claim 1 , further comprising:
 a release member attached to one end of the rotating shaft, the release member being movable in the axial direction of the rotating shaft; and   connecting members, each of which connects the corresponding movable member to the release member so that the movable member moves between the projecting position and the inner position in response to the movement of the release member in the axial direction.   
   
   
       3 . The bobbin fixing device according to Claim  1 , wherein each movable member has an outwardly downwardly sloping outer surface such that the height of projection increases toward the positioning member. 
   
   
       4 . The bobbin fixing device according to  claim 2 , further comprising:
 a biasing member that biases the release member away from the rotating shaft and allows each movable member to move to the projecting position;   a release restricting portion that restricts the movement of the release member away from the rotating shaft; and   projection restricting portions, each of which restricts the outward movement of the associated movable member from the projecting position.   
   
   
       5 . A bobbin removing device comprising:
 a holding member movable in the axial direction of a rotating shaft of a bobbin fixing device while holding a bobbin attached to the rotating shaft, the bobbin fixing device including the rotating shaft to which the bobbin is attached and movable members, each movable member being movable between a projecting position where the movable member projects from the level of the outer surface of the rotating shaft and an inner position inside the level of the outer surface and being in contact with a surface of the attached bobbin in the projecting position to restrict the movement of the bobbin in the removing direction in which the bobbin is removed from the rotating shaft; and   a movement permitting member that allows each movable member to move to the inner position and keeps the movable member in the inner position until the holding member moves the bobbin in the removing direction by a predetermined distance.   
   
   
       6 . The bobbin removing device according to  claim 5 , wherein the bobbin fixing device includes a release member attached to one end of the rotating shaft such that the release member allows each movable member to move to the inner position in response to the movement of the bobbin in the attaching direction in which the bobbin is attached to the rotating shaft, and
 the movement permitting member includes a pushing portion for pushing the release member in the attaching direction.   
   
   
       7 . The bobbin removing device according to  claim 6 , wherein the movement permitting member is mounted on the holding member and is moved to a pushing position, where the pushing portion pushes the release member to arrange each movable member in the inner position, in response to the movement of the holding member to a holding position where the holding member holds the bobbin. 
   
   
       8 . The bobbin removing device according to  claim 7 , wherein
 the holding member includes outer-edge holding portions capable of holding the outer-edge of a flange of the bobbin in the holding position, and   each outer-edge holding portion has an inwardly downwardly sloping inner surface.   
   
   
       9 . The bobbin removing device according to  claim 7 , wherein the movement permitting member has an elastic member retractable in the axial direction, one end of the elastic member being in contact with the holding member, the other end thereof being in contact with the pushing portion. 
   
   
       10 . The bobbin fixing device according to  claim 2 , wherein each movable member has an outwardly downwardly sloping outer surface such that the height of projection increases toward the positioning member. 
   
   
       11 . The bobbin fixing device according to  claim 3 , further comprising:
 a biasing member that biases the release member away from the rotating shaft and allows each movable member to move to the projecting position;   a release restricting portion that restricts the movement of the release member away from the rotating shaft; and   projection restricting portions, each of which restricts the outward movement of the associated movable member from the projecting position.   
   
   
       12 . The bobbin fixing device according to  claim 10 , further comprising:
 a biasing member that biases the release member away from the rotating shaft and allows each movable member to move to the projecting position;   a release restricting portion that restricts the movement of the release member away from the rotating shaft; and   projection restricting portions, each of which restricts the outward movement of the associated movable member from the projecting position.