1. An image forming apparatus comprising:
a main body;
an image forming portion for forming a toner image on a recording material;
a fixing unit for fixing the toner image on the recording material and including a nip forming member which forms a fixing nip that nips and conveys the recording material;
a reverse roller unit including a reverse roller, and said reverse roller backward rotatable to convey the recording material to said image forming portion again after conveying the recording material which has passed through the fixing nip in a same direction as a conveying direction at the fixing nip; and
a delivery roller for delivering the recording material which has passed through the fixing nip, out of said main body,
wherein said reverse roller unit is attached to said fixing unit, and is removably installable in said main body integrally with said fixing unit,
wherein said reverse roller unit is attached so as to be openable and closable with respect to said fixing unit,
wherein said main body includes a first positioning portion and a second positioning portion, and
wherein, when an integral unit of said fixing unit and said reverse roller unit is installed in said main body, said fixing unit is positioned with respect to said first positioning portion, and said reverse roller unit is positioned with respect to said second positioning portion.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A medical manipulator comprising:
a manipulator main body having a handle;
a drive unit, which is capable of being attached and detached with respect to the handle, and including a drive source; and
a number of times limiting mechanism disposed on the handle, which, in an event that the number of times that the drive unit has been attached and detached with respect to the handle, has reached a predetermined number of times, prevents attachment of the drive unit with respect to the handle.
2. The medical manipulator according to claim 1, wherein the number of times limiting mechanism comprises
an operating body that is mechanically interlinked with the attachment and detachment of the drive unit with respect to the handle, and
a counter mechanism that is operated by a predetermined amount with each time of operation of the operating body,
such that when the counter mechanism has been operated the predetermined number of times from an initial state thereof, attachment of the drive unit with respect to the handle is prevented.
3. The medical manipulator according to claim 2, wherein:
the number of times limiting mechanism includes a stopper that is changed to a regulating condition when the counter mechanism has been operated a predetermined number of times from the initial state thereof; and
the stopper, in the regulating condition, projects into a movement path of the drive unit the drive unit is attached to the handle.
4. The medical manipulator according to claim 2, wherein:
the number of times limiting mechanism includes a lock member that is displaced to a regulating position when the counter mechanism has been operated a predetermined number of times from the initial state thereof; and
the lock member, in the regulating position, prevents movement of the operating body.
5. The medical manipulator according to claim 2, wherein the operating body comprises a slider that is pressed by the drive unit and is displaced from a first position to a second position accompanying attachment of the drive unit with respect to the handle, and returns from the second position to the first position accompanying removal of the drive unit from the handle.
6. The medical manipulator according to claim 5, further comprising an operating body biasing means for biasing the operating body toward the first position.
7. The medical manipulator according to claim 2, wherein:
the number of times limiting mechanism is capable of being operated from a non-regulating condition to a regulating condition, and includes a stopper that, in the regulating condition, projects into a movement path of the drive unit when the drive unit is attached to the handle;
the counter mechanism includes an intermediate transmission mechanism that is driven accompanying operation of the operating body, and a rotating body that is rotated by the intermediate transmission mechanism; and
in a state in which the number of times of attachment and detachment is less than the predetermined number of times, the rotating body engages with the stopper to maintain the non-regulating condition, and in a state in which the number of times of attachment and detachment has reached the predetermined number of times, the rotating body allows the stopper to be changed to the regulating condition.
8. The medical manipulator according to claim 7, wherein:
each of the operating body, the intermediate transmission mechanism, and the rotating body is constituted from a plate-shaped member; and
the stopper is changed from the non-regulating condition to the regulating condition accompanying a tilting movement of the stopper from an initial posture.
9. The medical manipulator according to claim 7, wherein the intermediate transmission mechanism includes a plurality of mutually intermeshed gears.
10. The medical manipulator according to claim 7, wherein:
the number of times limiting mechanism includes a stopper biasing member that biases the stopper toward the regulating condition;
a notch is provided in the rotating body;
in a state in which the number of times of attachment and detachment is less than the predetermined number of times, an abutment provided on the stopper abuts against the rotating body, whereby the stopper is retained in the non-regulating condition in opposition to a biasing force of the stopper biasing member; and
in a state in which the number of times of attachment and detachment has reached the predetermined number of times, the abutment provided on the stopper capable of entering into the notch.
11. The medical manipulator according to claim 8, wherein the intermediate transmission mechanism includes a plurality of mutually intermeshed gears.