JPH0553207A - Image forming device - Google Patents

Abstract

PURPOSE:To provide an image forming device capable of replacing a lump without removing an original placing plate. CONSTITUTION:In the image forming device where an original on the original placing plate 2 is irradiated movable by a long lamp 7, a lamp replacement hole 16 is provided by notching the part positioned outside the original placing plate 2 of the top cover 15 in a range where the lamp 7 is movable wider than the width of the lamp. The replacement hole 16 is covered with a lid body 17 which can be freely attached and detached.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus, and more particularly to an image forming apparatus in which an original on a document platen supported on an upper portion of an image forming apparatus main body is moved and irradiated by a long lamp. It is about.

[0002]

2. Description of the Related Art An original placed on an original placing plate supported on the upper part of a main body of a device is moved and irradiated by a lamp, and an original image reflected from the original is guided to a photosensitive member or a CCD. A so-called movable optical system image forming apparatus is already known.

In such an image forming apparatus, the size of the original placing plate is set to be slightly larger than the size of the largest original placed on the original placing plate, and a long lamp for certification is provided below the original placing plate. Is supported by a movable lamp receiving member, and the lamp whose total width is larger than the opening width is used so that a sufficient amount of light can be emitted corresponding to the opening width of the upper part of the main body of the device. , The opening width is the copyable width.

In such a structure, when the lamp is replaced due to the life of the lamp or disconnection,
First, remove the original plate, and then remove the lamp from the lamp receiving member and take it out of the main unit.
When installing a new lamp, the procedure was reversed.

[0005]

The original plate is formed of a glass member called contact glass, which is relatively large and easily damaged or scratched. Therefore, when the original plate is removed from the main body of the apparatus. However, there has been a troublesome problem that the attachment and detachment work is not easy and a safe temporary storage place is required when removed.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an image forming apparatus in which the lamp can be replaced without removing the original plate.

[0007]

The present invention has means for solving the above-mentioned problems as follows. That is, in an image forming apparatus in which an original on a document platen supported on the upper part of the main body of the image forming apparatus is moved and irradiated by a long lamp, the ceiling cover within the movable range of the lamp is provided. It is characterized in that a portion outside the document plate is located outside and cut out to be larger than the lamp width to open a lamp replacement work hole, and the work hole is covered with a removable cover plate. .

[0008]

When replacing the lamp, it is possible to remove the cover plate covering the work hole opened in the top cover, move the lamp to the position of the work hole, and easily take out the lamp from the work hole. In other words, without removing the original plate, the lamp can be replaced by a simple operation that removes the lid plate that covers the work hole opened at a position away from the original plate, and the original plate is damaged. There is no worry of scratches. Further, there is no need for a separate place for temporarily placing the document placing plate.

[0009]

EXAMPLES The image forming apparatus of the present invention will be described in detail below based on examples. FIG. 1 is a perspective view of the image forming apparatus.
A document placing plate 2 made of a transparent glass plate on the upper surface of the apparatus main body 1.
The original holding plate 3 is stretched, and the original placing plate 2 can be freely opened and closed.
The illuminating device 4 and the optical system 5 are provided in the upper portion (see FIG. 5) inside the apparatus main body 1, and the copy processing unit 6 is provided in the lower portion.

The above lighting device 4 includes a lamp 7 and a reflector 8.
Further, the optical system 5 has mirrors 9, 10, 11, 12 and a lens 13, and the illuminator 4 and the mirror 9 are provided.
While moving in the direction A at a predetermined speed, the mirror 10,
By moving 11 in the same direction at a speed half the moving speed of the illumination device 4 and the mirror 9, the original placed on the original placing plate 2 is illuminated, and the reflected light from the original is reflected by the mirror 9, It can be guided to the photoconductor drum 14 provided in the copy processing section 6 through the 10, 11 lenses 13 and the mirror 12.

The copy processing unit 6 has a charging device 21 and a developing device 2 around the photosensitive drum 14 rotating in one direction.
2. A transfer device 23, a peeling device 24, a cleaner 25 and a charge eliminating lamp 26 are arranged, and the surface of the photosensitive drum 14 uniformly charged by the charging device 21 is irradiated with reflected light from the original document to form an electrostatic latent image. After forming the image, the developing device 22 visualizes the toner image, the transfer device 23 transfers the above-mentioned toner image onto the paper fed from the registration roller 27 at a predetermined timing, and thereafter, the peeling device 24 removes the paper. The toner is removed from the photoconductor drum 14, the cleaner 25 collects the residual toner, and the discharge lamp 26 eliminates the residual charge.

In such a structure, the illuminating device 4 and the mirrors 9 and 10 are at the home position at the left end position shown by the chain double-dashed line, and at the right side position shown by the solid line between the exposure scanning end points. Can be reciprocated by a drive device (not shown) along the guide rods 18 and the guide bars 19 (see FIGS. 2 and 3) arranged on both inner sides of the device body 1. Then, in the present embodiment, in order to facilitate the replacement of the lamp 7, a part of the ceiling cover 15 at the position of the end point of the exposure scanning is cut out to be larger than the widths of the lamp 7 and the reflector 8 for lamp replacement. The work hole 16 is opened, and the work hole 16 is detachably covered with a cover plate 17 (see FIG. 1). The reference numeral 15a in FIGS. 2 and 3 indicates
The working hole 16 is an opening that is closed by the original plate 2 and is connected to one end of the opening 15.

As described above, since the working hole 16 is opened outside the original placing plate 2 as shown in FIG. 1, when the lamp 7 is replaced, the original placing plate 2 is replaced by a conventional one. The lamp 7 can be easily taken out by moving the illuminating device 4 to the position of the working hole 16 and removing the lid plate 17 without removing it. After replacement of the lamp 7, the lid plate 17 is removed.
May be fixed to the top cover 15 again with screws or the like.
In this embodiment, the inner flange 17a of the cover plate 17 presses and fixes the right end edge of the document placing plate 2.

In order to make the above-mentioned lamp 7 replacement work even easier, in particular, in this embodiment, a simulation mode for lamp replacement is set in the drive control system of the illuminating device 4, and the operation shown in FIG. The lamp is moved to the replacement position by the procedure shown in the flowchart. The flow will be described. First, the apparatus main body 1
Numeric keypad provided on the operation panel 29 (see FIG. 1) of
When the value of the lamp replacement mode is input at 30 (S1), the drive control system of the lighting device 4 is set to the simulation mode (S2). Then, when the print key 31 is turned on (S3), if the illuminating device 4 is at the home position at that time (S4), the illuminating device 4 is moved to the end point of the exposure scanning as shown in FIG. S6). At this time, since the lighting device 4 is located immediately below the work hole 16, the lid plate 17
The lamp 7 can be easily replaced by removing (S7). In step 3, print key 31
If the lighting device 4 is not in the home position when is turned on, the lighting device 4 is temporarily returned to the home position (S5), and then the process proceeds to step 6. After the lamp replacement work, the clear key 32 is turned on (S9), the simulation mode for lamp replacement is released, and the flow ends.

Thus, when replacing the lamp 7,
The lamp 7 can be easily taken out from the illuminating device 4 moved to that position by removing the cover plate 17 covering the work hole 16 opened outside thereof without removing the original plate 2.

[0016]

As described above, according to the present invention, a portion of the ceiling cover, which is located outside the original placing plate and is located in the movable range of the lamp, is cut out by a width larger than the lamp width. Since a replacement work hole is opened and the work hole is covered with a removable lid, you can simply remove the lid without removing the original plate and remove the lamp from the lighting device that has been moved to that position. Can be easily removed and replaced. Therefore, it is not necessary to separately prepare a space for temporarily placing the document placing plate, and the document placing plate is not damaged or scratched.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts in an embodiment of an image forming apparatus of the present invention.

FIG. 2 is a plan view showing a correspondence relationship between a lighting device and work holes.

FIG. 3 is a plan view showing a state in which the lighting device has moved to a work hole.

FIG. 4 is a vertical cross-sectional view showing a correspondence relationship between a lighting device and work holes.

FIG. 5 is a configuration diagram of an image forming apparatus main body.

FIG. 6 is a flowchart for explaining a simulation mode of lamp replacement.

[Explanation of symbols]

1 ... Image forming apparatus main body, 2 ... Original plate, 7 ... Lamp, 15
… Top cover, 16… Work hole, 17… Cover plate.

Claims (1)

[Claims] 1. An image forming apparatus in which an original on a document platen supported on an upper part of an image forming apparatus main body is moved and irradiated by a long lamp, and a ceiling cover within a movable range of the lamp. The outer portion of the document mounting plate, which is located outside, is cut out to be larger than the lamp width to form a working hole for replacing the lamp, and the working hole is covered with a removable lid. Image forming apparatus.