Grafting method and device therefor

A grafting device for inserting a bar member into a stem of a stock, comprising:

• a chuck having a half-split head for opening and closing on said bar member;
• said chuck having head recesses in each half of said half-split head with balls disposed therein;
• a clamp member having said chuck movably disposed axially therein, said clamp member having an inner tapered surface abutted by said balls;
• a chuck spring biasing said chuck in said clamp member in a rearward direction to bring said balls into abutting engagement with said inner tapered surface of said clamp member to effect compression of said chuck by said inner tapered surface to hold said bar member in said chuck such that said bar member is released by said chuck when pulled in a forward direction out of said chuck and such that said bar member is secured in a clamped position in said chuck when pressure is applied to said bar member in a rearward direction into said chuck due to compression of said chuck;
• a pressing member with a storage chamber for storing bar members, said pressing member being disposed axially movable relative to said clamp member for effecting relative axial movement of said chuck and said clamp member;
• a jig member having an engaging means for removably accepting a front end of said clamp member and a bar member receiving hole formed in alignment with a hole in a front end of said clamp member such that said bar member may pass through said hole in said front end of said clamp member and into said bar member receiving hole when said clamp member is engaged with said jig member;
• and
• said bar member receiving hole having a bottom and a predetermined depth such that when said clamp member is engaged with said jig member and said pressing member is depressed by an operator applied force, said chuck advances forward in a downward direction in response to engagement with said pressing member and said balls disengage from said inner tapered surface of said clamp member to open said chuck and allow said bar member to fall through said chuck and said hole in said front end of said clamp member and into said bar member receiving hole of said jig member, such that when the operator applied force on said pressing member is removed, said chuck is closed by action of said chuck spring to clamp said bar member with a portion of said bar member having a predetermined length protruding out of said hole in said front end of said clamp member.

A grafting device for inserting a bar member into a stem of a stock at a graft joint end thereof, comprising:

• a chuck having a multi-split head opening and closing on said bar member;
• a clamp member having said chuck movably disposed axially therein, the clamp member having an inner tapered surface abutted by said multi-split head of said chuck;
• a chuck spring biasing said chuck in said clamp member in a rearward direction to bring said multi-split head into abutting engagement with said inner tapered surface of said clamp member to effect compression of said chuck by said inner tapered surface to hold said bar member in said chuck and such that said bar member is secured in a clamped position in said chuck when pressure is applied to said bar member in a rearward direction into said chuck due to compression of said chuck;
• a pressing member for pressing said chuck against a biasing force of said chuck spring, said pressing member having a storage chamber for storing bar members;
• a jig member having an engaging means for removably accepting a front end of said clamp member and a bar member receiving hole formed in alignment with a hole in a front end of said clamp member such that said bar member may pass through said hole in said front end of said clamp member and into said bar member receiving hole when said clamp member is engaged with said jig member;
• and
• said bar member receiving hole having a bottom and a predetermined depth such that when said clamp member is engaged with said jig member and said pressing member is depressed by an operator applied force, said chuck is advanced forward relative to said clamp member and in a downward direction displacing said inner tapered surface from said multi-split head to open said chuck to allow said bar member to fall through said chuck and said hole in said front end of said clamp member and into said bar receiving hole of said jig member, such that when the operator applied force on said pressing member is removed, said chuck is closed by action of said chuck spring to hold said bar member with a portion of a predetermined length protruding out of said hole in said front end of said clamp member.

A grafting device for grafting a stem of a stock to a stem of a scion, comprising:

• a storage chamber having bar members stored therein and at least a bar member of said bar members having a first bar portion to be inserted into the stem of said stock at a graft joint end and a second bar portion, axially continuous with said first bar portion, and adapted to be inserted into the stem of said scion at its graft joint end;
• a chuck having a multi-split head opening and closing on said bar member;
• a clamp member having said chuck movably disposed axially therein, the clamp member having an inner tapered surface abutted by said multi-split head of said chuck;
• a chuck spring biasing said chuck in said clamp member in a rearward direction to bring said multi-split head into abutting engagement with said inner tapered surface of said clamp member to effect compression of said chuck by said inner tapered surface to hold said bar member in said chuck and such that said bar member is secured in a clamped position in said chuck when pressure is applied to said bar member in a rearward direction into said chuck due to compression of said chuck;
• a pressing member for pressing said chuck against a biasing force of said chuck spring, said pressing member having said storage chamber incorporated therein;
• a jig member having an engaging means for removably accepting a front end of said clamp member and a bar member receiving hole formed in alignment with a hole in a front end of said clamp member such that said bar member may pass through said hole in said front end of said clamp member and into said bar member receiving hole when said clamp member is engaged with said jig member;
• and
• said bar member receiving hole having a bottom and a predetermined depth such that when said clamp member is engaged with said jig member and said pressing member is depressed by an operator applied force, said chuck is advanced forward relative to said clamp member and in a downward direction displacing said inner tapered surface from said multi-split head to open said chuck to allow said bar member to fall through said chuck and said hole in said front end of said clamp member and into said bar receiving hole of said jig member, such that when the operator applied force on said pressing member is removed, said chuck is closed by action of said chuck spring to hold said bar member with a portion of a predetermined length protruding out of said hole in said front end of said clamp member.