JPS62174736A - Image forming device - Google Patents

Abstract

PURPOSE:To perform fast image forming operation by performing the image forming operation while an original is set facing upward. CONSTITUTION:When a book B is used as an original, contact glass 3 at an original setting position and an original discharge table 11 are rotated upward, the book B is supported on an endless belt 23 with the face up, and then the contact glass 3 and original discharge table 11 are rotated downward to set the original. Then an original kind instruction signal indicating that the original is the book and a copying operation start signal are supplied to a controller 71 to drive a driving part 72, and an original platen 2 and the contact glass 3 are moved to an original exposure position. Then, an optical system 6 is driven by an optical system driving part 74 to take a copy through a copy processing part 4 and a coping form conveyance part 5. When the original is a sheet type, an original supply roller 16 is rotated at specific timing and one original is sent in from an original supply table 15 to take a copy similarly.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an image forming apparatus, and more specifically,
The present invention relates to an image forming apparatus that can perform a copy image forming operation with an original set facing upward.

<Conventional technology> Conventionally, when using a book as a manuscript, it has the advantage of making it easier to turn pages, improving copying efficiency, reducing damage to books, and improving copying position @ precision. 2. Description of the Related Art There has been provided a copying machine which allows a copying operation to be performed while a document is set face up on a document table. As such a copying grip, an original platen unit i is removably attached to the lower part of the copying processing section and the copy paper feeding section, and the original is placed face up on the original platen unit, and the original is illuminated by a light source. Illuminate the object and copy the reflected light through the lens! The structure was such that a copy could be obtained by directing it to the Science Department No. 28 (refer to Publication No. 59-26726).

<Problems to be Solved by the Invention> The above-mentioned conventional copying device is convenient when using a book as an original, but even when using a sheet-like original, it is difficult to set and take out the original. Since the large document table unit must be moved every time copying is performed, there is a problem in that the copying process cannot be made faster.

<Object of the invention> This invention was made in view of the above problems,
An object of the present invention is to provide an image forming apparatus that can improve operational efficiency for image formation when a document is used as a document, and maintain a high image forming speed when a sheet document is used. It is said that

Means for Solving the Problems> In order to achieve the above object, an image forming apparatus of the present invention has an endless belt as a main part and an upward-facing original.
! A document tray, a contact glass, an optical system that exposes the document from above the contact glass at a predetermined position, and a movement that selectively moves the document table and the contact glass to a document exposure position and a non-exposure position. means, and transmit the rotational drive to the endless belt at the document exposure position! The invention is characterized by comprising a control means for performing lil control.

In a copying machine with the above configuration, a #-registered original is placed face up on a document table whose main part is an endless belt, and pressed against the bottom surface of the contact glass. , and the contact glass are moved to the document exposure position, the document can be exposed from above the contact glass at a predetermined position by the optical section to perform an image forming operation.

In addition, when using a sheet-shaped original, the original can be placed by moving the original placing table and the contact glass to the original exposure position using the moving means and transmitting the rotational driving force to the endless belt using the control means. It is possible to transport a sheet-like original while the table is stopped at a predetermined position, and furthermore, it is also possible to perform an image forming operation using an optical system.

<Example> Hereinafter, embodiments will be described in detail with reference to the accompanying drawings showing examples.

FIG. 1 is a schematic diagram showing an embodiment of the image forming apparatus of the present invention, in which a reciprocating document table (2) and a contact glass (3) are provided at a predetermined position on the upper part of the copying machine main body (1).
It has a copy processing section (4) and a copy@M sending section (5) at a predetermined position in the lower part, and furthermore, the main part is located above the contact glass (3) and an optical system is installed. (6).

The document table (2) has four parts inside the casing (21).
rollers (22a) (22b) (22c) (22d
) has an endless belt (23) wrapped around it, and a pair of O-ra (22c) (2
2d) is urged outward and downward by springs (24c and 24d), thereby tensioning the endless belt (23) between the rollers (22a)<22b). A moving force is transmitted to the casing (21) from a motor (not shown) by a chain or the like (not shown) as a moving means, and the document exposure position shown by the solid line in FIG. 1 and the document exposure position shown by the broken line in the same figure are It is designed to move between the document setting position and the document setting position.

Further, a clutch or the like (not shown) is attached as a control means for transmitting rotational force to the roller (22b) at the document exposure position. Note that (11) is a document ejection table located above the contact glass (3) at the document setting position, and the contact glass (3) and the document ejection table (11) are rotated upward by a hinge mechanism (not shown) or the like. This makes it possible to set the original.

The optical system (6) includes a light source (61) disposed above the contact glass (3) at the document exposure position, and a reflection 1! ! (62) (63) (64) (65),! :
, "fi mass h" 3, the lens (66) disposed below the null source 4iR feed path (12), and the reflection ffl (
67) (68)

The copy processing section (4) includes a photosensitive drum (41) that rotates in one direction, a charging charger (42), a developing device (43), a transfer charger (44), and a separation charge V.
(45) and a cleaner (46) are arranged in this order.

The above-mentioned copy paper transport section (5) feeds paper: ]O (51a) (5
1b), registration roller (52), conveyance roller (53)
, a conveyor belt (54), and a fixing device (55), the copy paper is fed from either one of the paper feed cassettes (17) and (18) and conveyed to the copy processing section (4), and then, Via the front device (55) the catch can be discharged onto the tray (19).

In addition, (13014) is a document ejection roller, and (15)
1 is a document supply table, and (16) is a document supply roller.

FIG. 3 is a block diagram showing the main parts of the copying machine, in which control signals from a control device (71) that inputs an original type instruction signal and a copying operation start signal are sent to a drive section (72), a control section (
73), optical system drive section (74), copy processing section drive section (7
5).

The operation of the copying machine having the above configuration is as follows.

When using the fil kansei as a document, first rotate the contact glass (3) at the document setting position and the document ejection table (11) upward.
After supporting the IF (8) upwardly on the endless belt (23), the original is set by rotating the contact glass (3) and the original ejection table (11) downward. Thereafter, by performing a key operation (not shown), etc., a document type instruction signal indicating that the document is an IRf document is supplied to the control device (71), and a copying operation start signal is also supplied to the control wJ device (71). KokuvJ Club (72
) is operated, the moving force is applied to the casing (21) from a motor (not shown) via a chain (not shown), etc.
The information is transmitted to the document table (2) and the contact glass (
3) can be moved to the original exposure position (first
(See solid line in the figure).

Thereafter, the optical system (6) is driven by the optical system drive unit (74) to scan and expose the entire surface of the document a predetermined number of times (equal to the number of copies), and copy processing is performed in synchronization with the execution of this scanning exposure operation. A copy can be obtained by driving the section (4) and the copy paper transport section (5).

After that, place the document table (2) and the contact glass (3).
) to the original set position #1vJ, turn the page or replace the original in this state, and perform the above operation again to obtain a copy.

(When using a III sheet manuscript, in this case,
By performing a key operation (not shown), etc., a document type instruction signal indicating that the document is a sheet document is sent to the control device (71).
) and also controls the copy operation start signal.
It is only necessary to supply it to the drive unit (72) first.
is operated, and the document table (2) and contact glass (3) can be moved to the document exposure position in the same manner as described above (see FIG. 2). After that, the control unit (73
) is operated, the rotational force is transmitted to the roller (22b) by a clutch (not shown), etc., and the endless belt (22b) is operated.
23) will be rotationally driven.

Therefore, at a predetermined timing, the document supply roller (16)
) can be rotated to feed a single document from the document supply table (15), stopped at a fixed position while being pressed against the contact glass (3), and then opened in the same way as above with the optical system (6). ), copy processing section (4), and copy paper transport section (5)
A copy can be obtained by driving the .

Thereafter, by rotationally driving the endless belt (23) and the document discharge rollers (13) and (14), the document is discharged onto the document discharge table (11), and by repeating the above operation again, the copy is produced. Obtainable.

In this case, unlike book manuscripts, the manuscript table (2) remains stationary at a fixed position, so the overall copying speed when copying multiple manuscripts is about the same as that of conventional high-speed machines. It can be done.

Note that the present invention is not limited to the above-described embodiments; for example, it is possible to perform exposure while moving the original without moving the optical system, and it is also possible to perform exposure while moving the original without moving the optical system. It is possible to move the document a predetermined distance in a direction perpendicular to the conveying direction of the document, and various other design changes can be made without changing the gist of the present invention.

<Effects of the Invention> As described above, the present invention allows the image forming operation to be performed while the original is set face up, so page turning and original replacement, especially in the case of book originals, can be done during the process. When a sheet-like original is used, the unique effect is that high-speed image forming operations comparable to those of conventional high-speed operations can be performed.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of 11R of a copy box as an embodiment of the present invention, FIG. 2 is a schematic explanatory diagram when a sheet-like original is used, and FIG. 3 is a block diagram showing the main parts of the copy box.

Claims (1)

[Claims] 1. Manuscript with endless belt as the main part A document table for facing up and a contact guard. the contact glass in place. an optical system that exposes the original from above the glass; Attach the document table above and the contact glass. Selective exposure and non-exposure positions of originals The moving means to move the document and the document exposure position. Rotating drive to the above endless belt and control means for controlling transmission of motion. An image forming apparatus characterized by: