JPH01303458A - Copying machine - Google Patents

Abstract

PURPOSE:To improve cleaning workability by setting the copying movable range of an original platen so that a slit is covered with the original platen from above regardless of the copying movable position of the original platen and forming the opening gap on a cleaner insertion path communicating with a machine between the edges of the original platen and the slit. CONSTITUTION:The original platen 4 on which an original is placed is designed to automatically and reciprocatingly move to the right and left on the armour 1 at the time of copying, and to always cover the slit 2 with itself from above regardless of its copying movable position. The left edge 4b of the original platen 4 and the opening left edge 2a of the slit 2 have such a shape that they can guide a cleaner A in terms of its horizontal movement when it is inserted from the opening gap 5a of the cleaner insertion path to move it horizontally. As a result, without the armour in front of the copying machine opened, the charger wire, etc., of an electrifying charger can be cleaned outside the copying machine, and operability in handling the cleaner and cleaning workability can be improved greatly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a copying machine in which, for example, a charger line of a charger provided inside the machine can be cleaned by an external operation.

[Conventional technology]

In an electrostatic copying machine, the surface of the photoreceptor must be charged before the surface of the photoreceptor is exposed to light. Therefore, a charger is incorporated around the photoreceptor to charge the surface of the photoreceptor. This charger has a charger wire, and by applying a high voltage to the charger wire made of thin tungsten wire arranged near the photoconductive layer of the photoreceptor, corona is generated from the charger wire. It is configured to ionize air molecules, and these ions adhere to the surface of the photoreceptor and become electrically charged.

The charger line mentioned above tends to get dirty while using the copying machine, and this dirt on the charger line will appear as "unevenness" or "smudges" on the copied image, so check the charger line regularly. need to be cleaned.

Conventionally, when cleaning the charger wire of the charger, the front of the copying machine (Wl) was opened, the charger built into the machine was pulled out, and the charger installed inside the charger was cleaned. This was done by wiping the lines.

[Problem to be solved by the invention]

However, as mentioned above, configuring the exterior body on the front side of the copying machine to be openable so that the charger wire of the electrostatic charger can be cleaned, or configuring the electrostatic charger to be pulled out from the machine, makes it easier for the copying machine. Not only does this complicate the structure of the copying machine, but it also increases the size and weight of the copying machine, and also leads to high manufacturing costs.

[Failure to solve the problem]

The copying machine of the present invention has been made to solve the above-mentioned problems, and can be used without opening the front exterior of the copying machine or pulling out the charger from inside the machine.
The structure is such that the charger wire of the charger and the like can be cleaned from outside the copying machine.

That is, a slit is formed in the exterior body forming the top wall of the copying machine to allow light from a light source lamp disposed below the exterior body to be irradiated onto the document tray, and the document tray is located on the exterior body. In a copying machine that is provided so as to be able to reciprocate from side to side, the slit is covered from above by the original holder regardless of the copy movement position of the original holder when the original holder moves back and forth on the outer body during copying. The copy movement range of the document table is set so that the document table can be moved beyond the copy movement range when the document table is not copying. While moving the original to the limit of the movement area in one direction, move the original so that an opening gap for the cleaner insertion passage that passes into the machine is formed between the edge of the original table and the edge of the sulin. The present invention is characterized in that a movement area limit of the document placing table is set, and an edge of the document placing table and an edge of the slit form a guide shape for a cleaner.

[For production]

With the above configuration, in order to clean the charger wire etc. of the electrostatic charger built into the copier, the exterior body on the front side of the copier can be opened and closed, and the electrostatic charger etc. can be pulled out from inside the machine. There is no need for
This makes it possible to promote miniaturization, weight reduction, and cost reduction of copying machines. In addition, objects inside the machine can be cleaned by simply inserting the cleaner from the outside into the cleaner insertion path through the opening gap formed between the edge of the document tray and the edge of the slit and operating the cleaner. As a result, the operability of the cleaner and the workability of cleaning are greatly improved.

[Embodiment 1] An embodiment of the present invention will be described below based on FIGS. 1 to 9.

As shown in FIGS. 1 and 2, an exterior body 1 that forms the top wall of the copying machine has a document tray 4 that can be moved back and forth from side to side on this exterior body 1. , a slit 2 of a predetermined width is extended. A light source lamp 3 is provided on the lower side of the exterior body 1, and the light emitted from the light source lamp 3 is irradiated through the sulin 1-2 toward a transparent document stand 4 that is slidable on the exterior body 1. It is arranged so that it can be done.

The document table 4 on which the document is placed is used for copying.
It is configured to automatically move back and forth from side to side on the exterior body 1, but regardless of the copy movement position of the document stand 4 at this time, the sulin 2 is always covered from above by the document stand 4. It is configured so that That is, the third
As shown in the figures to FIG. 5, even when the document tray 4 is located at the left and right ends of the copying movement range E at the copy movement position of the document tray 4 to the left and right during copying, the The copying movement range E of the document platform 4 is set so that the slit 2 is covered from above by the document platform 4.

To explain in more detail the above relationship between the slit 2 formed in the exterior body 1 and the original platen 4 during copying, the third
In the state shown in the figure, the document tray 4 is located on the exterior body 1 at a position where the center line of the document tray 4 coincides with the center line of the document tray 4, and in this position of the document tray 4, the slit 2 is of course covered by the document tray 4 from above. be.

In the state shown in FIG. 4, in which the C2 document stand 4 has moved to the left end of the copy movement range E due to the copying operation, the right end 114a of the document stand 4 is located close to the slit 2; It is covered from above by the right end peripheral portion of the mounting base 4.

On the other hand, due to the copying operation, the document table 4 moves within the copying movement range E.
In the state shown in FIG. 5 in which the document tray 4 has been moved to the right end, the left edge 4b of the document tray 4 is still located close to the slit 2, but the slit 2 is covered from above by the left edge of the document tray 4. is in a state of

In this way, no matter which copying movement position the document tray 4 is at in the copying movement range E, the slit 2 formed in the exterior body 1 is always covered from above by the document tray 4. This makes it possible to prevent dust and the like from entering the machine from the outside as much as possible.

Next, when not copying, as shown in FIG. 6, the document table 4 is configured to be able to move slightly further from the copying movement range E at least in one direction, either left or right. In this embodiment, the document table 4 can be moved beyond the copy movement range E to the movement range limit F in the right direction. When the original table 4 is moved to the movement area limit F, as shown in FIG. 6 and also in FIGS. 1 and 2, the left edge 4b of the document table 4 is
The moving area limit F of the document table 4 is set on a relative basis so that an opening gap 5a of the cleaner insertion passage 5 leading into the machine is formed between the opening left end 8!2a of the slit 2 and the opening left end 8!2a of the slit 2 There is.

Further, the left edge 4b of the original table 4 and the opening left edge 2a of the slit 2 are the opening gap 5 of the cleaner insertion passage 5.
It has a guide shape that can guide the lateral movement of the cleaner A when it is inserted from a and moved laterally.

In FIG. 1, a reflector 6 is provided around the lower side of the light source lamp 3 to reflect the light emitted from the light source lamp 3 and guide it to the original table 4 through the slit 2. This reflector 6 is made of, for example, a sheet metal. An opening 6a into which the cleaner A can be inserted is formed at a location on the cleaner insertion passage 5 of the reflector 6, and this opening 6a extends in the length direction of the reflector 6 as shown in FIG. It extends along the

In the reflector 6, two flexible sheets 7 and 8 having light-shielding and light-reflecting properties are placed vertically opposite each other so as to cover the opening 6a. It is attached using double-sided tape, etc. The light reflectivity of the flexible sheets 7 and 8 is imparted by having their surfaces coated with Ann. These two flexible sheets 7 and 8 block the cleaner insertion passage 5 inside the machine, creating a light-shielding state.Furthermore, the flexible sheets 7 and 8 are made to have light reflective properties, so that a part of the reflector 6 is blocked. It is supposed to form.

The flexible sheet 7 on the outer side of the machine above the cleaner insertion passage 5 is attached to the upper surface side of the reflector 6, as shown in FIGS. 7 and 8.

The adhesion surface area X of the flexible sheet 7 to the reflector 6 is formed in the area shown by diagonal lines in FIG. The upper end of the flexible sheet 7, excluding the above-mentioned sticking surface area However, when the cleaner A is inserted into the opening 6al, the longitudinal edge 7a of the sheet separates from the reflector 6 and partially stands up, as shown in FIG. Furthermore, the flexible sheet 7 has an inclined edge 7b which is cut out from the upper end side along the cleaner insertion passage 5 and is inclined upward in the direction of movement of the cleaner A after insertion (direction of arrow C). At the same time, a tongue piece 7c is formed above the cleaner insertion passage 5 and hangs down from the upper end side.

On the other hand, the flexible sheet 8 on the inside of the machine, which is provided facing the flexible sheet 7, has a reflector 6.
It is attached to the bottom side of the . This flexible sheet 8
As shown in FIGS. 7 and 8, in contrast to the flexible sheet 7, is attached to the upper wall along the opening 6a of the reflector 6, and is attached to the lower wall side of the opening 6a. Sheet longitudinal edge 8 a of the flexible sheet 8 located
In the normal state, it is in contact with the reflector 6 without a gap, and when force from the cleaner A is applied, it becomes a non-adhesive surface area that bends away from the reflector 6 and partially falls down.

As shown in FIG. 1, in the reflector 6, there are
A slot y h 6 b is formed for introducing reflected light from the light source lamp 3 onto the document surface on the document table 4 to the SELFOC lens 9 disposed below the reflector 6 .

Further, as shown in FIG. 1, a charger 10 is arranged below the flexible sheets 7 and 8 on the cleaner insertion passage 5, and a charger wire 1 is disposed inside a charger case 10a of the charger 10.
ob is installed. The charger case 10a has an opening 10c that allows insertion into the cleaner and lateral movement.

A photosensitive drum 11 is rotatably provided inside the photosensitive drum 11, and the charger 1o and Selfoc lens 9 are arranged in this order around the photosensitive drum 11. Around the body drum 11,
Developing device 12, transfer paper guide river 3, transfer charger 14
, a peeling roller 15, and a cleaning unit 16 are arranged in this order.

Next, the operation of the copying machine will be explained. When a document is placed on the document table 4, a document cover (not shown) is placed over it, and the copy switch is turned on, the charger 10
A high voltage is applied to the charger line 10b, and a corona is generated from the charger line 10b to ionize air molecules,
These ions adhere to the surface of the photoreceptor drum 11, and the outer peripheral surface of the photoreceptor drum 11 is charged.

On the other hand, as the original table 4 reciprocates left and right on the outer body 1 between the copy movement range E, a part of the light emitted from the light source lamp 3 is transmitted to the outer side of the machine, which constitutes the reflector 6 and a part thereof. The light is reflected by the flexible sheet 7, and almost the entire amount of light illuminates the document surface on the document table 4 through the slit 2 of the exterior body 1. The reflected light from the document surface is reflected by the reflector 6.
reaches the SELFOC lens 9 through the slit 6b of the photosensitive drum 11.
The upper charged surface is imagewise exposed.

The latent image formed on the photosensitive drum 11 by image exposure is developed into a visible toner image by the developing device 12, and is then guided by the transfer paper guide 13 by the transfer charger 14. The visible image is transferred to the transferred paper. Thereafter, the transfer paper is peeled off from the photosensitive drum 11 by a peeling roller 15, and the visible image on the transfer paper is fixed by a fixing device (not shown) before being discharged to the outside of the machine.

On the other hand, the toner remaining on the photoreceptor drum 11 as a developer is removed by the cleaning unit 16, and after the photoreceptor drum 11 is further neutralized, it again enters the charging area by the aforementioned charger (2)0.

By repeating the copying operation described above, the charger I
If dirt adheres to the O charge wire 10b, if this condition is left as it is, "unevenness" or "smudges" will appear on the copied image, so it is necessary to periodically clean the charge wire 10b.

In this case, by moving the document table 4 beyond the copying movement range E to the movement area I@F in one direction (in this embodiment, the direction B in Fig. 2), the image shown in Figs. As shown, the left edge 4b of the original table 4 and the slit 2
An opening gap 5a is formed between the opening left edge 2a and the opening left edge 2a.

Opening gap 5a of the cleaner insertion passage 5 leading into this machine
Then, insert the charger cleaning tip A' of the cleaner A as shown in FIG.

At this time, since the insertion position of the charger cleaning tip A° of the cleaner A is predetermined, when the cleaner A is inserted into the cleaner insertion passage 5 from the specified position, the left end edge 4b of the document table 4 and The cleaner A is positioned and guided by the left edge 2a of the opening of the slit 20 of the exterior body 1, and the cleaner A
The charger cleaning tip A' is attached to the tongue piece 7 of the flexible sheet 7 on the outside of the machine attached to the reflector 6.
Push in c and then press the flexible sea 1-8 inside the machine.
is inserted while lowering the charger, and its charger cleaning tip A' comes into contact with the charger wire 10b of the charger 10.

In this state, when the cleaner A is moved laterally along the longitudinal direction of the slit 2 of the exterior body 1 in the direction C in FIG. , the longitudinal edge 7a of the seat is partially raised. Therefore, as shown in FIGS. 2 and 8, the flexible sheet 7 on the outside of the machine fixed to the reflector 6 partially stands up, while Since the flexible sheet 8 partially falls down, by moving the cleaner A laterally, the cleaner insertion passage 5
It becomes possible to clean the charge wire 10b of the charger 10 with the cleaner A while temporarily opening the charger 10.

By performing this cleaning operation by horizontal movement to the leaner about 3 times, the charger &% 1
0b can be reliably cleaned.

When the cleaner A is removed from the cleaner insertion passage 5, it is sufficient to return the cleaner A to the original designated position and then pull it out. After the cleaner A is removed from the cleaner insertion passage 5, the flexible sheets 7 and 8 return to their original flat sheet shape due to their elasticity, so that the cleaner insertion passage 5 can be inserted into the cleaner insertion passage 5 as shown in FIG. It is reliably blocked by the flexible sheets 7 and 8. In this state where the leaner insertion passage 5 is blocked, there is no possibility that stray light from outside the machine or from the light source lamp 3 will enter the photosensitive drum 11 side through the opening 6a of the reflector 6, and the lexical sheet 7・No transmission of light from 8 occurs.

In the above embodiment, the left edge 4 of the original table 4
Insert the charger cleaning tip A' of the cleaner A shown in FIG. However, the same cleaner A can also be used to clean the light source lamp 3.

In this case, when the light source lamp cleaning tip A'' of the cleaner A shown in FIG. Since there is sliding contact, the light source lamp 3 can be cleaned by moving the cleaner A laterally in the same way as in the previous embodiment.

Even when the cleaner A is moved laterally at this time, the left edge 4b of the original table 4 and the left edge 2a of the opening of the slit 2 are
It will function as a gas/f-door when moving to the cleaner.

As described above, the object inside the machine that is cleaned by the cleaner A using the opening gap 5a between the opening left edge 8!2a of the document table 4 and the opening left edge 2a of the slit 2 is cleaned by the charger 10. It goes without saying that the line 10b is not limited to the line 10b, and may be the light source lamp 3, for example, or other objects inside the machine that require cleaning.

〔Effect of the invention〕

As described above, in the copying machine of the present invention, a slit is formed in the exterior body forming the top wall of the copying machine to allow light from the light source lamp arranged on the lower side of the exterior body to irradiate the document table. , and in a copying machine in which the document tray is provided so as to be movable back and forth from side to side on the exterior body, the slit is fixed regardless of the copy movement position of the document tray when the document tray moves back and forth on the exterior body during copying. The copy movement range of the document table is set so that the document table covers the document table from above, and the document table can further move in at least one direction to the left or right from the copy movement range of the document table when not copying. When the scanner is moved beyond the copying movement range to the limit of the movement area in one direction, an opening gap for a cleaner insertion passage leading into the machine is formed between the edge of the original table and the edge of the slit. The limit of the movement area of the original table is set so that the document table can move, and the edge of the document table and the edge of the slit form a guide shape for a cleaner.

As a result, there is no risk of dust entering the inside of the machine through the slits in the exterior body during copying, etc., but when it becomes necessary to clean objects inside the machine, the cleaner insertion passage can be opened from the outside. You can clean objects inside the aircraft by simply inserting the cleaner through the gap and operating it.

In this way, the structure allows objects inside the machine to be cleaned directly from the outside, which greatly reduces the number of component parts, making copiers smaller, lighter, and lower in cost. can. Moreover, the cleaning work can be carried out smoothly, and the cleaning workability is greatly improved.

[Brief explanation of the drawing]

1 to 9 show an embodiment of the present invention, in which FIG. 1 is a schematic diagram of a copying machine, and FIG. A schematic configuration diagram showing a state in which the tip end is inserted and the charger wire of the charger is cleaned, and FIGS. 3 to 5 respectively show how the original table is placed when copying. ■An explanatory diagram showing the copying movement range, Figure 6 is an explanatory diagram showing the set position at the limit of the movement range of the document table when cleaning objects inside the machine from the outside during non-copying, and Figure 7 is an explanatory diagram showing the setting position at the limit of the movement range of the document table when cleaning objects inside the machine from the outside when not copying. FIG. 8 is a perspective view of the main part of the flexible sheet attached to the reflector, and FIG. It is a perspective view of a cleaner. 1 is an exterior body, 2 is a slit, 2a is an opening left edge of the slit, 3 is a light source lamp, 4 is a document holder, 4b is a left edge of the document holder, 5 is a cleaner insertion passage, 5a is an opening gap of the cleaner insertion passage, 6 is a reflector, 7 and 8 are flexible sheets, 10 is a charger, 10b is a charger line, A is a cleaner, A" is a charger cleaning tip, A is a light source lamp cleaning tip, and E is a copy of the document stand. The movement range, F, is the limit of the movement area of the original table. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. A slit is formed in the exterior body forming the top wall of the copying machine to allow light from a light source lamp disposed below the exterior body to irradiate the document stand, and the above-mentioned In a copying machine in which a document tray is provided so as to be able to move back and forth from side to side on the exterior body, the slit is moved by the document tray regardless of the copying movement position of the document tray when the document tray moves back and forth on the exterior body during copying. The copying movement range of the document tray is set so that it is covered from above, and the document tray can be further moved in at least one direction to the left or right from the copying movement range of the document tray when not copying, and the document tray is set to be covered from above during the copying movement. When the original is moved beyond the range to the limit of the movement area in one direction, the original is moved so that an opening gap for the cleaner insertion passage leading into the machine is formed between the edge of the original table and the edge of the slit. A copying machine characterized in that a movement area limit of the document placing table is set, and an edge of the document placing table and an edge of the slit form a guide shape for a cleaner.