Laminating apparatus, and film cassette and film shaft used therein

1. A laminating apparatus comprising:

a sheet feed mechanism unit configured to convey a sheet to be laminated into an apparatus main body;

a film cassette in which a pair of films for lamination is accommodated, the film cassette being detachable from the apparatus main body; and

a press-bonding mechanism unit configured to perform a laminating process through thermal press bonding while sandwiching the sheet with the pair of films delivered from the cassette in the apparatus main body, wherein

the apparatus main body includes an upper unit of an openable and closable type, and

the upper unit is provided with one pressing roller of a pair of pressing rollers for press-bonding in the press-bonding mechanism unit, and an upper member of another mechanism for performing a process in a state where upper and lower sides of the sheet is sandwiched between the pair of films.

2. The laminating apparatus according to claim 1 , wherein

in the film cassette, a film is wound around a pair of film shafts pivotally supported in a rotatable manner at upper and lower positions across a conveying path of the sheet when the film cassette is installed in the apparatus main body, and

the film cassette is installed by being fitted downward from above the apparatus main body.

3. The laminating apparatus according to claim 2 , wherein the film cassette includes a pair of idle rollers projectable and retractable in an up and down direction of the press-bonding mechanism unit in the apparatus main body from a side of the film shaft.

4. The laminating apparatus according to claim 3 , wherein

each of the pair of idle rollers is pivotally supported by end portions of a pair of roller arms, and

when the film cassette is installed in the apparatus main body, one ends of the roller arms are projectable and retractable from an inside of the film cassette into the apparatus main body.

5. The laminating apparatus according to claim 4 , wherein the pair of idle rollers protrudes according to an operation of closing the upper unit, and retracts according to an operation of opening the upper unit.

6. The laminating apparatus according to claim 4 , wherein after the upper unit is closed, the pair of idle rollers protrudes according to an operation of a pressure lever to apply pressure to the press-bonding mechanism unit, and retracts according to an operation of releasing the pressure lever.

7. The laminating apparatus according to claim 1 , further comprising:

a rotary cutter unit provided behind the press-bonding mechanism unit, the rotary cutter unit being configured to sandwich a sheet, to which the laminating process is applied, between a fixed blade and a rotary blade and cut the sheet in a width direction; and

a mechanism configured to, when the rotary blade is located at a rotary position at which the rotary blade abuts the fixed blade at a time of closing a cover of an openable and closable type, separate positions of the rotary blade and the fixed blade from each other, and when the rotary blade rotates in a state where the cover of the openable and closable type is closed, return the rotary blade and the fixed blade to original positions.

8. The laminating apparatus according to claim 1 , wherein a speed of a conveyance roller that conveys the sheet while sandwiching the sheet in the sheet feed mechanism unit is switched between two speeds including a high speed and a low speed, so that a space between a preceding sheet and a subsequent sheet is made constant.

9. The laminating apparatus according to claim 1 , further comprising a film identifying unit capable of being set to an appropriate state according to a type and size of a film loaded to the film cassette, wherein

a state of the film identifying unit is recognized by the apparatus main body and a laminating process is performed according to the type and size of the film.

10. The laminating apparatus according to claim 1 , further comprising a film detection sensor provided to the apparatus main body, the film detection sensor being energized to be brought into contact with a surface of a film wound around the film shaft in the film cassette installed in the apparatus main body to detect a position of the surface of the film, wherein

a remaining amount of the film is detected by the film detection sensor.

11. The laminating apparatus according to claim 10 , wherein the film detection sensor also serves to detect whether or not the film cassette is installed.

12. A film shaft that holds a film for lamination, the film being wound directly on the film shaft, to supply the film to a laminating apparatus,

wherein an end portion of the film shaft has a diameter larger than a diameter of a shaft portion, and a shape of the film shaft in a vicinity of a first end of the film shaft and a shape of the film shaft in a vicinity of a second end of the film shaft that is opposite to the first end are different from each other, and

wherein a surface of the film shaft has markings in a dented shape, the markings being provided at intervals corresponding to widths of different paper sizes.