Drive apparatus, sheet transport apparatus and sheet collection apparatus
AssigneeNisca Corporation
InventorTakahiro NAKANO
Life of this patent
Estimating the term…
Abstract
A self-hold type solenoid pulls a plunger by passage of electric current, and attracts and holds with permanent magnets also after interruption of the passage of electric current. A stopper member shifts between a regulation position for striking a front end of a transported sheet and a retracted position retracted from the regulation position by operation of the plunger. The self-hold type solenoid enhances the pull force of the plunger by being supplied with an electric current corresponding to one pulse at timing at which the transported sheet strikes the stopper member existing in the regulation position, and the stopper member is prevented from retracting by receiving an impact in striking the sheet.
Claims8
A drive apparatus which causes a transport target body traveling to strike a contact surface of a regulation member and thereby halts the transport target body in a regulation position, comprising:
- a self-hold type solenoid which has a magnetic coil and a permanent magnet, shifts a plunger from a first position to a second position by passage of electric current through the magnetic coil for a certain time, and which holds the plunger in the second position with the permanent magnet even when the passage of electric current through the magnetic coil is interrupted;
- and
- a control section that controls the passage of electric current through the self-hold type solenoid and interruption of the passage of electric current,
- wherein the control section interrupts the passage of electric current after shifting the plunger from the first position to the second position by the passage of electric current through the self-hold type solenoid, and after interrupting the passage of electric current, maintains the plunger in the second position against a contact force of the transport target body with the contact surface, by passage of electric current again through the self-hold type solenoid for a certain time before the transport target body strikes the regulation member.
A sheet transport apparatus to transport a sheet, comprising:
- a transport mechanism that transports a sheet;
- a stopper member that is struck by a front end of the sheet transported by the transport mechanism to regulate the front end of the sheet in a predetermined position;
- a self-hold type solenoid to shift the stopper member to a regulation position for regulating the front end of the sheet and a retracted position retracted from the regulation position;
- and
- a control section that controls drive of the self-hold type solenoid,
- wherein the control section passes an electric current through the self-hold type solenoid for a certain time to pull the plunger of the self-hold type solenoid, and after attracting to a permanent magnet, interrupts passage of the electric current, while passing an electric current through the self-hold type solenoid before the front end of the sheet strikes the stopper member, and after the front end of the sheet strikes, interrupting passage of the electric current.
A sheet collection apparatus to collect sheets, comprising;
- a collection tray to collect sheets;
- a transport mechanism that discharge a sheet onto the collection tray;
- a stopper member that is struck by a front end of the sheet discharged by the transport member above the collection tray to load the sheet in a predetermined position on the collection tray;
- a self-hold type solenoid that shifts the stopper member to a regulation position for regulating the front end of the sheet by striking and a retracted position retracted from the regulation position;
- and
- a control section that controls drive of the self-hold type solenoid,
- wherein the control section passes an electric current through the self-hold type solenoid for a certain time to pull the plunger, and after attracting to a permanent magnet, interrupts passage of the electric current, while passing an electric current through the self-hold type solenoid before the front end of the sheet strikes the stopper member, and after the front end of the sheet strikes, interrupting passage of the electric current.
Dependencies are inferred from the claim text.