A lifting apparatus includes a motor, circular support members, power transmission members, guide mechanisms, and electromagnets. The circular support members provide tensile forces to wires connected to a load. The power transmission members rotate around the rotation axis Ax as a center of rotation by driving force of the motor. The guide mechanisms support the circular support members so as to enable the circular support members to slide in a predetermined ranges along a radial direction of the rotation axis, respectively. The electromagnets forcibly arrange the circular support members using electromagnetic force at a position that the center axes of the circular support members agree with the rotation axis in the predetermined ranges.

A conveyance apparatus according to the disclosure includes a conveyance unit that conveys a sheet, a flapper movable between a first position and a second position, a flapper moving unit that moves the flapper to the first position when power is supplied, a door to open a predetermined conveyance path and a second conveyance path, a detection unit that detects an occurrence of an abnormal state relating to the conveyance apparatus, and a control unit that, in a case where the detection unit detects the occurrence of the abnormal state while a sheet is conveyed to the first conveyance path by the conveyance unit and the flapper is in the first position, stops a sheet conveyance operation of the conveyance unit and inhibits the flapper from moving to the second position by continuing to supply power to the flapper moving unit.

A sheet conveyance device includes a pair of separable contact rollers configured to convey a sheet, a contact/separation mechanism configured to support the pair of separable contact rollers in such a manner that the pair of separable contact rollers are able to come into separable contact with each other, and a solenoid configured to operate the contact/separation mechanism. The solenoid is driven so that the contact/separation mechanism causes the pair of separable contact rollers to come into pressure contact with each other, and driving of the solenoid is cancelled so that the contact/separation mechanism causes the pair of separable contact rollers to be separated from each other. Pulse width modulation duty control is performed on the solenoid while the pair of separable contact rollers are in pressure contact with each other when a plurality of the sheets are conveyed one by one at an interval.

A conveyance apparatus according to the disclosure includes a conveyance unit that conveys a sheet, a flapper movable between a first position and a second position, a flapper moving unit that moves the flapper to the first position when power is supplied, a door to open a predetermined conveyance path and a second conveyance path, a detection unit that detects an occurrence of an abnormal state relating to the conveyance apparatus, and a control unit that, in a case where the detection unit detects the occurrence of the abnormal state while a sheet is conveyed to the first conveyance path by the conveyance unit and the flapper is in the first position, stops a sheet conveyance operation of the conveyance unit and inhibits the flapper from moving to the second. position by continuing to supply power to the flapper moving unit.

A sheet conveyance device includes a pair of separable contact rollers configured to convey a sheet, a contact/separation mechanism configured to support the pair of separable contact rollers in such a manner that the pair of separable contact rollers are able to come into separable contact with each other, and a solenoid configured to operate the contact/separation mechanism. The solenoid is driven so that the contact/separation mechanism causes the pair of separable contact rollers to come into pressure contact with each other, and driving of the solenoid is cancelled so that the contact/separation mechanism causes the pair of separable contact rollers to be separated from each other. Pulse width modulation duty control is performed on the solenoid while the pair of separable contact rollers are in pressure contact with each other when a plurality of the sheets are conveyed one by one at an interval.

A wire tension control mechanism includes a wire feeding device, a connecting device and a wire guiding device. The connecting device includes a fixing element and a rotor. The fixing element is connected with the wire feeding device. The rotor is disposed on the fixing element and is movable relative to the fixing element. The wire guiding device is connected to the rotor.