JPH0766205B2 - Copier - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a copying machine in which, for example, a charger wire of a charging charger provided in the machine can be cleaned by an external operation.

[Conventional technology]

In the electrostatic copying machine, the surface of the photoconductor must be charged as a pre-process of exposing the surface of the photoconductor. Therefore, in order to charge the surface of the photoconductor, a charger is incorporated around the photoconductor. This charger has a charger wire, and when a high voltage is applied to the charger wire consisting of a thin tungsten wire that is arranged near the photoconductive layer of the photoconductor, corona is generated from the charger wire and air is generated. The molecules are ionized, and the ions are attached to the surface of the photoconductor to be charged.

The above charger line is liable to become dirty during use of the copying machine, and the stains on the charger line appear as "mura" or "streaks" on the copied image. Need to be cleaned.

Conventionally, when cleaning the charger wire of the charging charger, the outer casing on the front side of the copying machine is opened, and the charging charger built into the machine is pulled out to the outside, and the charger wire installed inside the charger is installed. It was done by wiping.

[Problems to be Solved by the Invention]

However, as described above, in order to clean the charger wire of the charger, the exterior body on the front side of the copying machine can be opened or the charging charger can be pulled out of the machine. In addition to complicating the structure of (1), the copying machine is inevitably increased in size and weight, and the manufacturing cost is increased.

[Means for Solving the Problems]

The copying machine of the present invention has been made in order to solve the above-mentioned problems. For example, the exterior body on the front side of the copying machine is opened, or a symmetrical object such as a charger that needs cleaning is pulled out from inside the copying machine. Even if it does not, the charger wire of the charger can be cleaned from the outside of the copying machine.

That is, a slit for irradiating the original placing table with light from a light source lamp arranged below the outer casing is formed in the exterior body forming the upper wall of the copying machine, and the original placing table is on the exterior body. In a copying machine which is reciprocally movable to the left and right, the slits are covered from above by the document table regardless of the copy moving position of the document table when the document table reciprocates on the exterior body during copying. The copy movement range of the document table is set, and when the document table is not copied, it can be further moved in at least one of the left and right directions from the copy movement range of the document table, and the document table is moved in one direction beyond the copy movement range. In the state of moving to the limit of the moving area of the document, between the edge of the document table and the edge of the slit, the inside of the machine for cleaning the symmetrical object in the machine that needs to be cleaned is connected. The moving area limit of the document table is set so that an opening gap of the cleaner insertion passage is formed, and the edge of the document table and the edge of the slit form a guide shape for the cleaner. There is.

[Action]

According to the above-mentioned structure, the cleaner is inserted into the copying machine from outside the copying machine by utilizing the opening gap of the cleaner insertion passage which is formed between the edge of the document table and the edge of the slit and communicates with the inside of the machine. It is designed to clean in-flight symmetrical objects that require cleaning, such as the charger wire of the charging charger.

As a result, in order to clean symmetrical objects inside the copier that require cleaning, the exterior body on the front side of the copier can be opened and closed, and the charger can be pulled out from the machine. Therefore, the number of constituent parts of the copying machine is significantly reduced, and the downsizing, weight reduction and cost reduction of the copying machine can be promoted. Also, the object inside the machine can be cleaned simply by inserting a cleaner from the outside into the cleaner insertion passage through the opening gap formed between the edge of the document table and the edge of the slit and operating the cleaner. Therefore, the operability of the cleaner and the workability of cleaning are significantly improved.

[Embodiment 1] The following will describe one embodiment of the present invention with reference to FIGS. 1 to 9.

As shown in FIGS. 1 and 2, the exterior body 1 forming the upper wall of the copying machine is provided with a front and rear direction orthogonal to the moving direction of the document table 4 which can reciprocate left and right on the exterior body 1. A slit 2 having a predetermined width is extended. A light source lamp 3 is provided on the lower side of the exterior body 1 so that light emitted from the light source lamp 3 can be radiated through the slit 2 toward a transparent document table 4 slidable on the exterior body 1. It is located in.

The original table 4 on which the original is placed is
Although it automatically reciprocates left and right on the exterior body 1, the slit 2 is always covered from above by the document table 4 regardless of the copy movement position of the document table 4 at this time. Is configured. That is, as shown in FIGS. 3 to 5, the document table 4 of the copying machine is used.
Even when the document table 4 is located at the left and right ends of the copy movement range E in the copy movement range E to the left and right of the exterior body 1.
The slit 2 formed on the document placing table 4 is covered with the document placing table 4 from above so that the copy moving range E of the document placing table 4 is
Is set.

The above-mentioned relationship between the slit 2 formed on the exterior body 1 and the document table 4 during copying will be described in more detail.
In the state shown in the drawing, the document table 4 is located at a position where the center lines of the document table 4 on the outer casing 1 coincide with each other, and the slit 2 is of course covered from above by the document table 4 at this position. is there.

In the state shown in FIG. 4 in which the document table 4 is moved to the left end of the copy moving range E by the copying operation, although the right edge 4a of the document table 4 is located close to the slit 2, the slit 2 is not the document table. It is in a state of being covered from above by the right end peripheral portion of No. 4.

On the other hand, due to the copying operation, the document table 4 is moved to the copy movement range E.
In the state shown in FIG. 5 which has moved to the right end of FIG. 5, although the left edge 4b of the document table 4 is positioned close to the slit 2 as well, the slit 2 is covered by the left end peripheral portion of the document table 4 from above. It is in a broken state.

As described above, even if the document table 4 is located at any copy movement position in the copy movement range E, the slit 2 formed on the exterior body 1 is always covered with the document table 4 from above, and thus the slit 2 is formed. Through this, it is possible to prevent dust and the like from entering into the machine from the outside as much as possible.

Next, during non-copying, as shown in FIG. 6, the document table 4 is constructed so as to be able to move slightly further from the copy moving range E in at least one of the left and right directions. In the present embodiment, the original table 4 can be moved beyond the copy moving range E to the right moving region F. Move the document table 4 to the moving area limit F
In the state in which the original table 4 is moved to the left end, as shown in FIG. 6 and FIGS.
The moving area limit F of the document table 4 is set under a relative condition so that an opening gap 5a of the cleaner insertion passage 5 communicating with the inside of the machine is formed between the slit 2 and the left end edge 2a of the opening.

The left edge 4b of the document table 4 and the left edge 2a of the opening of the slit 2 are moved laterally when the cleaner A is inserted through the opening gap 5a of the cleaner insertion passage 5 and moved laterally. It has a guide shape that can guide.

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

In the reflector 6, two flexible sheets 7 and 8 having a light-shielding property and a light-reflecting property facing each other so as to cover the opening 6a are provided on the upper surface side and the lower surface side of the reflector 6 with an adhesive or It is attached with double-sided tape. The light reflectivity of the flexible sheets 7 and 8 is given by making the surface thereof an Al vapor deposition surface. These two flexible sheets 7 and 8 cut off the cleaner insertion passage 5 in the machine halfway to provide a light-shielding state. Moreover, the flexible sheets 7 and 8 are provided with light reflectivity to partially cover the reflector 6. To form.

The flexible sheet 7 on the outside of the machine on the cleaner insertion passage 5 is attached to the upper surface side of the reflector 6 as shown in FIGS. 7 and 8. The attachment surface area X of the flexible sheet 7 with respect to the reflector 6 is formed in the area shown by hatching in FIG. The upper end portion of the flexible sheet 7 excluding the pasting surface area X is a non-sticking surface area Y, and the sheet longitudinal end edge 7a corresponding to the non-sticking surface area Y
Normally contacts the reflector 6 without any gap,
When the cleaner A is inserted into the opening 6a, the sheet longitudinal end edge 7a is separated from the reflector 6 and partially rises, as shown in FIG. Further, the flexible sheet 7 has an inclined edge 7b formed by cutting out from the upper end side along the cleaner insertion passage 5 and inclined upward in the moving direction (arrow C direction) after insertion of the cleaner A. In addition, a tongue piece 7c is formed on the cleaner insertion passage 5 from the upper end side.

On the other hand, the flexible sheet 8 on the inner side of the machine, which is provided so as to face the flexible sheet 7, is provided with the reflector 6
Is affixed to the lower surface side of. This flexible sheet 8
As shown in FIG. 7 and FIG. 8, contrary to the flexible sheet 7, it is affixed to the upper wall along the opening 6a of the reflector 6, and on the lower wall side of the opening 6a. The sheet longitudinal end edge 8a of the positioned flexible sheet 8 is normally in contact with the reflector 6 without a gap, and when a force from the cleaner A is applied, the flexible sheet 8 is separated from the reflector 6 and bends partially so that it partially falls. It is an area.

As shown in FIG. 1, a portion of the reflector 6 that is slightly displaced from the position where the flexible sheets 7 and 8 are formed reflects the light reflected from the light source lamp 3 onto the original surface of the original table 4 and reflects it. A slit 6b for introducing into the self-fox lens 9 arranged below is formed.

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 10b is installed inside the charger case 10a of the charger 10. Has been done. The charger case 10a has an opening 10c through which the cleaner A can be inserted and moved laterally.

A photoconductor drum 11 is rotatably provided inside the copying machine, and the charger 10 and the cell fox lens 9 are sequentially arranged around the photoconductor drum 11. Further, a developing device is provided around the photosensitive drum 11.
12, transfer paper guide 13, transfer charger 14, peeling roller 1
5, and the cleaning unit 16 are arranged in this order.

Next, the operation of the copying machine will be described. When a document is placed on the document table 4, a document cover (not shown) is placed on the document table 4 and the copy switch is turned on, a high voltage is applied to the charger wire 10b of the charger 10 and corona is generated from the charger wire 10b. Air molecules are ionized, and the ions adhere to the surface of the photoconductor drum 11 to charge the outer peripheral surface of the photoconductor drum 11.

On the other hand, the document table 4 reciprocates left and right on the exterior body 1 in the copy movement range E, and at the same time, a part of the light emitted from the light source lamp 3 is on the outside of the machine which constitutes the reflector 6 and a part thereof. After being reflected by the flexible sheet 7, almost the entire amount of light irradiates the document surface on the document table 4 through the slit 2 of the exterior body 1. The light reflected from the document surface is reflected by the reflector 6
It reaches the SELFOX lens 9 through the slit 6b, and the SELFOX lens 9 causes the photosensitive drum
The charged surface on 11 is imagewise exposed.

The latent image formed on the photosensitive drum 11 by image exposure is
The developing device 12 develops the toner image into a visible image, and then the transfer charger 14 transfers the visible image to the transfer paper guided by the transfer paper guide 13. After that, the transfer paper is peeled off from the photoconductor drum 11 by the peeling roller 15, and then a visible image on the transfer paper is fixed by a fixing device (not shown) and then discharged to the outside of the apparatus.

On the other hand, the toner as the developer remaining on the photosensitive drum 11 is removed by the cleaning unit 16,
Further, after the photosensitive drum 11 is destaticized, it again enters the charging area by the charging charger 10.

By repeating the above-mentioned copying operation, the charger 10
If there is dirt on the charger wire 10b of the above, leaving this state as it is causes unevenness or streaks on the copied image.
Therefore, it is necessary to regularly clean the charger wire 10b.

In this case, as shown in FIGS. 1 and 6 etc., the document table 4 is moved beyond the copy movement range E to a movement region limit F in one direction (direction B in FIG. 2 in this embodiment). As described above, the opening gap 5a is formed between the left edge 4b of the document table 4 and the opening left edge 2a of the slit 2. From the opening 5a of the cleaner insertion passage 5 communicating with the inside of the machine to the second
As shown in the figure, the charger cleaning tip A'of the cleaner A is inserted.

At this time, the insertion position of the charger cleaning tip portion A ′ of the cleaner A is predetermined, so when the cleaner A is inserted into the cleaner insertion passage 5 from the designated position, the left end edge 4b of the document table 4 is The cleaner A is positioned and guided by the left end edge 2a of the opening 2 of the slit 2 of the outer package 1, and the charger cleaning tip A'of the cleaner A is attached to the reflector 6 and is located outside the machine. The tongue piece 7c of 7 is pushed in, and the flexible sheet 8 on the inside of the machine is further inserted while being lowered, and the charger cleaning tip portion A'abuts on the charger wire 10b of the charger 10.

In this state, when the cleaner A is laterally moved in the direction C of FIG. 8 along the longitudinal direction of the slit 2 of the exterior body 1, after the cleaner A hits the inclined edge 7b of the flexible sheet 7 on the outside of the machine, the sheet The longitudinal edge 7a is partially raised. Therefore, as shown in FIGS. 2 and 8, the flexible sheet 7 outside the machine fixed to the reflector 6 partially rises, while the flexible sheet 8 inside the machine partially rises, so that the cleaner A
Is moved laterally to temporarily open the cleaner insertion passage 5 and the charger wire of the charging charger 10.
10b can be cleaned by the cleaner A.

By performing such a cleaning operation by lateral movement of the cleaner A about three times reciprocally, the charger wire 10b can be reliably cleaned.

When removing the cleaner A from the cleaner insertion passage 5, the cleaner A may be returned to the original designated position and then pulled out. After the cleaner A is removed from the cleaner insertion passage 5, the elastic sheets of both the flexible sheets 7 and 8 restore their original flat sheet shapes. It is reliably shut off by the flexible sheets 7 and 8. In such a blocked state of the cleaner insertion passage 5, there is no risk 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 flexible sheet 7 -There is no transmission of light from 8.

In the above embodiment, the left edge 4b of the document table 4 is
The charger cleaning tip A'of the cleaner A shown in FIG. 9 is inserted into the opening gap 5a formed between the opening left edge 2a of the slit 2 and the opening 2a of the slit 2 to clean the charger wire 10b of the charger 10. However, the light source lamp 3 can also be cleaned using the same cleaner A.

In this case, when the light source lamp cleaning tip A ″ of the cleaner A shown in FIG. 9 is inserted through the opening gap 5a, the brush portion formed on the light source lamp cleaning tip A ″ becomes the outer peripheral surface of the light source lamp 3. Since they are in sliding contact with each other, the cleaner A can be moved laterally in the same manner as in the above-described embodiment to clean the light source lamp 3.
Even when the cleaner A is laterally moved at this time, the left end edge 4b of the document table 4 and the opening left end edge 2a of the slit 2 serve as a guide along with the movement of the cleaner A.

As described above, the left edge 2a of the opening of the document table 4 and the slit 2
The object in the machine to be cleaned by the cleaner A using the opening gap 5a between the left end edge 2a of the opening of is not limited to the charger wire 10b of the charger 10.
For example, it may be the light source lamp 3 or may be an in-flight object requiring cleaning other than these.

〔The invention's effect〕

As described above, in the copying machine of the present invention, the exterior body forming the upper wall of the copying machine is provided with the slit for irradiating the original table with the light from the light source lamp disposed below the exterior body. In the copying machine in which the document table is reciprocally movable left and right on the exterior body, the slit is provided regardless of the copy movement position of the document table when the document table reciprocates on the exterior body during copying. The copy movement range of the document table is set so that the document table is covered from above by the document table, and when the document table is not copied, it can be further moved in at least one of the left and right directions from the copy movement range of the document table. Is moved beyond the copy moving range to the limit of the moving area in one direction, and a cleaning object is cleaned between the edge of the document table and the edge of the slit. The limit of the moving area of the document table is set so that the opening gap of the cleaner insertion passage leading to the inside of the machine is formed, and the edge of the document table and the edge of the slit form a guide shape for the cleaner. It has a structure.

This prevents dust and the like from entering the machine through the slits of the exterior body during copying, etc., and when it is necessary to clean the object inside the machine, it will be passed through the opening gap of the cleaning insertion passage from the outside. The object inside the machine can be cleaned simply by inserting the cleaner and operating it.

As described above, since the object inside the machine can be directly cleaned from the outside, the number of constituent parts can be significantly reduced, and the copying machine can be downsized, lightweight, and low cost. it can. In addition, the cleaning work can be performed smoothly, and the workability of the cleaning is significantly improved.

[Brief description of drawings]

1 to 9 show an embodiment of the present invention. FIG. 1 is a schematic configuration diagram of a copying machine, and FIG. 2 is an inside of the copying machine for cleaning a charger of a cleaner from outside the machine. FIG. 6 is a schematic configuration diagram showing a state in which the tip end is inserted to clean the charger wire of the charger, FIGS. 3 to 5 are explanatory diagrams showing a copy movement range of the document table at the time of copying, and FIG. FIG. 7 is an explanatory view showing a setting position in a moving area limit of the document table when cleaning an object in the machine from the outside during non-copying, FIG. 7 is a perspective view of a main part of a flexible sheet attached to a reflector, and FIG.
FIG. 9 is a perspective view of a main part showing a state in which two flexible sheets attached to a reflector are temporarily opened by inserting a cleaner, and FIG. 9 is a perspective view of the cleaner. 1 is an exterior body, 2 is a slit, 2a is a left edge of the slit opening, 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 wire, A
Is a cleaner, A'is a charger cleaning tip, A "is a light source lamp cleaning tip, E is a copy movement range of the document table, and F is a movement range of the document table.

Claims (1)

[Claims] 1. A slit for irradiating a document table with light from a light source lamp disposed under the package is formed in an exterior body forming an upper wall of a copying machine, and the document base is provided. In a copying machine which is reciprocally movable to the left and right on the exterior body, the slit is covered from above by the original placement table regardless of the copy movement position of the original placement table when the original placement table reciprocates on the outer body during copying. The copy movement range of the document table is set so that the document table can be further moved to at least one of the left and right directions from the copy movement range of the document table when the copy is not performed. And move it to the limit of the movement area in one direction, and place it inside the machine for cleaning the in-machine symmetrical object that needs cleaning between the edge of the document table and the edge of the slit. The movement limit of the document table is set so that the opening gap of the cleaner insertion passage is formed, and the edge of the document table and the edge of the slit form a guide shape for the cleaner. Characteristic copier.