JPH087522B2 - 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 problem]

The copying machine of the present invention has been made in order to solve the above-mentioned problems, and the copying machine of the copying machine can be operated without opening the exterior body on the front side of the copying machine or pulling out the charging charger from the inside of the copying machine. It is configured so that the charger wire and the like of the charger can be cleaned from the outside.

That is, the copying machine according to claim 1 is provided with a cleaner insertion passage leading to a charging charger for charging the photoconductor through a reflector that reflects light emitted from the original scanning light source from the outside of the copying machine, On the above reflector,
An opening is formed as a cleaner insertion passage, and a flexible sheet having a light shielding property is provided in the opening so that the opening can be opened and closed.

The copying machine according to claim 2 is provided with a cleaner insertion passage communicating with a charger for charging a photoconductor through a reflector that reflects light emitted from a document scanning light source from the outside of the copying machine. An opening is formed as a cleaner insertion passage, and a flexible sheet having a light-shielding property is provided at the inside position and the outside position of the opening so as to be able to open and close the opening and face each other. It is characterized by that.

According to a third aspect of the present invention, the copying machine is provided with a cleaner insertion passage that leads to a charger that charges a photoconductor through a reflector that reflects light emitted from a document scanning light source from the outside of the copying machine. And a charging charger case of the charging charger are formed with both openings as a cleaner insertion passage, and a flexible sheet having a light-shielding property is provided in each of these openings so that the opening can be opened and closed. While the sheet is light reflective and forms part of the reflector,
The flexible sheet on the charging charger case side is
It is characterized by having conductivity and forming a part of the charger case.

The copying machine according to claim 4 is provided with a cleaner insertion passage that leads to a charging charger for charging the photoconductor through a reflector that reflects the light emitted from the original scanning light source from the outside of the copying machine. An opening is formed as a cleaner insertion passage, and a flexible sheet having a light shielding property is provided at a position on the reflector in the opening so that the opening can be opened and closed, and the flexible sheet has a notched cleaner. An insert is formed,
In the cleaner insertion portion, when the inserted cleaner moves in the charger line direction of the charging charger, the flexible sheet is pushed by the cleaner and is inclined from the cleaner moving direction so as to rise from the reflector. It is characterized in that an inclined edge reaching from the cleaner insertion portion to the edge portion of the flexible sheet is formed.

[Work]

With the above-described configuration, it is possible to reduce the size, weight, and cost of the copying machine. Further, the object inside the copying machine, that is, the charger can be cleaned simply by inserting the cleaner into the opening of the reflector that forms the cleaner insertion passage from the outside and operating the cleaner.
The operability of the cleaner and the workability of the cleaning are significantly improved, and stray light or the like can be prevented from entering the copying machine to maintain excellent copying performance. further,
It is also possible to minimize the gap between the reflector and the electrification charger, and the object inside the copying machine can be cleaned by the cleaner without plastically deforming the flexible sheet.
That is, the cleaning operation for the charging charger can be smoothly performed.

[Embodiment 1] The following will describe one embodiment of the present invention with reference to FIGS. 1 to 4.

As shown in FIG. 1 and FIG. 2, the exterior body 1 forming the upper wall of the copying machine has a front-back direction orthogonal to the moving direction of the document table 4 which is movable 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 document table 4 on which the original document is placed automatically reciprocates left and right on the outer casing 1 during copying. However, regardless of the copy movement position of the original document table 4 at this time, the slit is always provided. 2 is configured to be covered by the document table 4 from above. That is, in the copy movement range of the document table 4 to the left and right at the time of copying, even when the document table 4 is located at the left and right ends of the copy movement range, the slits 2 formed in the exterior body 1 are moved from above by the document table 4. The copy movement area of the document table 4 is set so as to be covered.

Further, the document table 4 can be slightly moved further in at least one of the left and right directions from the copy movement range of the document table 4 when not copying, and the document table 4 is moved beyond the copy movement range. A state in which the movement area is limited to one direction (direction B in FIG. 2 in this embodiment) (first direction)
In the state shown in FIG. 2 and FIG.
The width of the slit 2 and the moving area limit of the document table 4 are set so that an opening gap 5a of the cleaner insertion passage 5 communicating with the inside of the machine is formed between the edge of the slit 2 and the edge of the slit 2. There is.

Around the lower side of the light source lamp 3, 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. The reflector 6 is made of sheet metal, for example. An opening 6a into which the cleaner A can be inserted is formed at a position of the reflector 6 located on the cleaner insertion passage 5. The opening 6a extends in the longitudinal direction of the reflector 6 as shown in FIG. It has been extended along.

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 above-mentioned light reflectivity is possessed by only the flexible sheet 7 on the outside of the machine or both flexible sheets 7 and 8. Specifically, when the surface of the flexible sheet is an Al vapor deposition surface, light is reflected. It has reflectivity. And these two flexible sheets 7
The cleaner insertion passage 5 in the machine is blocked in the middle by the means 8 so as to be in a light-shielding state, and furthermore, the flexible sheets 7 and 8 are provided with light reflectivity to form a part of the reflector 6.

The flexible sheet 7 outside the machine in the cleaner insertion passage 5 is attached to the upper surface side of the reflector 6 as shown in FIGS. 3 and 4. As shown by the diagonal lines in FIG. 3, the attachment surface area X of the flexible sheet 7 to the reflector 6 is the entire area of the lower end portion of the flexible sheet 7 along the lower wall of the opening 6a of the reflector 6, and if necessary. As a result, the side edges and the side edges of the flexible sheet 7 are formed on a part of the upper end of the flexible sheet 7. The upper end portion of the flexible sheet 7 excluding the sticking surface area X is a non-sticking surface area Y, and the sheet longitudinal edge 7a corresponding to the non-sticking surface area Y does not have a gap with the reflector 6 in a normal state. Although in contact with each other, when the cleaner A is sandwiched in 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 having an inclined edge parallel to the inclined edge 7b and hanging from the upper end side is formed on the cleaner insertion passage 5, and the cleaner insertion passage 5 is formed by this tongue piece 7c. Is partially blocked. The flexible sheet 7
When another flexible sheet 8 is provided to face the above, the tongue piece 7c may be omitted. Therefore, as shown in FIG. 4, when the tip of the cleaner A is pushed from the tongue piece 7c located on the cleaner insertion passage 5 and the cleaner A is further moved laterally, the cleaner A moves the flexible sheet 7 Since the slanted edge 7b is raised, the cleaner A can be moved laterally while the sheet longitudinal edge 7a, which is the non-sticking surface area Y of the flexible sheet 7, partially rises to the outside of the machine.

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 attached to the lower surface side of the reflector 6. As shown in FIGS. 3 and 4, the flexible sheet 8 is attached to the upper wall along the opening 6a of the reflector 6 contrary to the flexible sheet 7, and The sheet longitudinal end edge 8a of the flexible sheet 8 located on the lower wall side is normally in contact with the reflector 6 without a gap, and when the force from the cleaner A is applied, the flexible sheet 8 separates from the reflector 6 and partially falls while bending. It is a non-stick surface area. Therefore, when the front end of the cleaner A is pushed and moved laterally, the sheet longitudinal end edge 8a of the flexible sheet 8 below the slanting portion partially falls to the inside of the machine.

As shown in FIG. 1, at a position slightly deviated from the position where the flexible sheets 7 and 8 are formed on the reflector 6, as shown in FIG.
A slit 6b is formed for introducing the reflected light, which has been irradiated from the light source lamp 3 onto the document surface on the document table 4, into the SELFOC lens 9 arranged 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 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 charging charger 10 and the SELFOC 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 put 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 the charger wire 10b
Corona is generated from these to ionize air molecules, and these ions adhere to the surface of the photoconductor drum 11,
The outer peripheral surface of the is charged.

On the other hand, the document table 4 reciprocates left and right on the exterior body 1 between the copy movement ranges, and at the same time, a part of the light emitted from the light source lamp 3 is flexible outside the machine forming the reflector 6 and a part thereof. When reflected by the 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
Reaches the Selfoc lens 9 through the slit 6b of
By this SELFOC lens 9, the charged surface on the photosensitive drum 11 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 then guided by the transfer charger 14 by the transfer paper guide 13. The visible image is transferred onto the transfer paper. 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 a developer remaining on the photoconductor drum 11 is removed by the cleaning unit 16 and the photoconductor drum 11 is decharged, and then enters the charging area by the charging charger 10 again.

By repeating the copying operation described above, the charging charger
If the charger wire 10b of 10 is contaminated, if left unattended, it will appear as "unevenness" or "streaks" in the copied image, so it is necessary to clean the charger wire 10b regularly.

In this case, as shown in FIG. 1, the document table 4 is moved by moving the document table 4 beyond the copy movement range to a movement region limit in one direction (direction B in FIG. 2 in this embodiment). From the opening gap 5a of the cleaner insertion passage 5 formed between the edge of the cleaner 2 and the edge of the slit 2,
Insert the tip of the cleaner A as shown in FIG.
At this time, since the insertion position of the tip of the cleaner A is predetermined, when the cleaner A is inserted into the cleaner insertion passage 5 from the designated position, the edge of the document table 4 and the slit of the exterior body 1 are inserted. The cleaner A is positioned by the edge of the cleaner 2, and the tip of the cleaner A pushes the tongue piece 7c of the flexible sheet 7 on the outer side of the machine, which is attached to the reflector 6, and further the flexible sheet 8 on the inner side of the machine. It is inserted while being lowered, and its tip end contacts the charger wire 10b of the charging charger 10.

In this state, when attempting to laterally move the cleaner A along the longitudinal direction of the slit 2 of the exterior body 1 in the direction C of FIG. 4, the cleaner A hits the inclined edge 7b of the flexible sheet 7 on the outer side of the machine, and further C When it is moved laterally in the direction, the sheet longitudinal end edge 7a of the flexible sheet 7 partially rises. Therefore, as shown in FIGS. 2 and 4, the flexible sheet 7 outside the machine fixed to the reflector 6 partially rises, while the flexible sheet 8 inside the machine partially rises. By moving it sideways, the cleaner insertion passage 5
It is possible to clean the charger wire 10b of the charger 10 with the cleaner A while temporarily opening. 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. And such a cleaner insertion passage 5
In the shut-off state, 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 transmission of light from the lexible sheets 7 and 8 will not occur. .

[Embodiment 2] Another embodiment of the present invention will be described with reference to FIGS. 5 and 6. In addition, the same reference numerals are given to the constituent members having the same functions as those in the first embodiment, and the description thereof will be omitted.

A flexible sheet 7 on the outside of the machine is attached to the reflector 6 so as to cover the opening 6a of the reflector 6 formed on the cleaner insertion passage 5 from above. The flexible sheet 7 has a light reflecting property, and the light reflecting flexible sheet 7 forms a part of the reflector 6. Reflector 6 in this flexible sheet 7
The attachment structure to the same as that of the first embodiment is specifically as shown in FIG.

On the other hand, as shown in FIG. 5, the flexible sheet 8 on the inside of the machine, which is provided so as to face the above-mentioned flexible sheet 7, is a charger case in the charger 10.
The flexible sheet 8 is attached so as to cover the opening 10c of the opening 10a from the inside. The flexible sheet 8 has a light-shielding property and a conductivity, and forms a part of the charger case 10a. The attachment structure of the flexible sheet 8 is the same as the attachment structure on the lower surface of the reflector 6 shown in the first embodiment.

Therefore, when the tip end of the cleaner A is inserted into the cleaner insertion passage 5 through the opening gap 5a formed between the exterior body 1 and the document table 4 and moved laterally, as shown in FIG. Sheet longitudinal edge of flexible sheet 7
7a rises inside the reflector 6, while the sheet longitudinal edge 8a of the flexible sheet 8 on the machine side falls inside the charger case 10a of the charger 10 and the cleaner insertion passage 5 is temporarily opened. Become.

According to the present embodiment, the reflector 6 and the charging charger 10
The gap between and can be minimized, and part of the components are replaced by lightweight flexible sheets 7 and 8, which can further promote downsizing, weight reduction, and cost reduction of the copying machine. Becomes

In the above embodiment, the cleaner insertion passage 5 inside the copying machine is provided with the charger wire 10b of the charger 10 through the reflector 6 from the opening gap 5a formed between the exterior body 1 and the document table 4. However, the formation position of the cleaner insertion passage 5 is not limited to the above embodiment. That is, when the cleaner A is inserted into the machine to clean an object that needs to be cleaned, the cleaner insertion passage 5 is provided between the constituent walls of various constituents that obstruct the cleaner insertion passage 5 or between the constituent walls. A flexible sheet 7/8 having a light-shielding property for blocking the above is provided so that the flexible sheet 7/8 can be temporarily opened while cleaning only when the cleaner A is inserted to clean the object. It should be done. As a result, stray light, which tends to accompany the formation of the cleaner insertion passage 5, is prevented from entering the photosensitive drum 11, and the cleaner A is inserted into the cleaner insertion passage 5 from the outside of the copying machine and moved laterally. It becomes possible to clean a predetermined object.

Further, in the above-described embodiment, the two flexible sheets 7 and 8 having a light-shielding property so as to block the cleaner insertion passage 5 are opposed to each other on the outer side and the inner side of the cleaner insertion passage 5 inside the machine. However, if a sufficient light shielding property is obtained in the cleaner insertion passage 5, only one flexible sheet may be provided on the cleaner insertion passage 5. However, in order to sufficiently secure the light blocking effect in the cleaner insertion passage 5, it is desirable to provide two or more flexible sheets 7 and 8 on the cleaner insertion passage 5 as needed. As a result, it is possible to reliably prevent the transmission of light from the flexible sheets 7 and 8 and the intrusion of stray light from the opening 6a of the reflector 6. In addition,
All of the above are included in the gist of the present invention.

〔The invention's effect〕

In the copying machine according to the first aspect of the present invention, as described above, the cleaner insertion passage leading to the charging charger for charging the photoconductor through the reflector that reflects the light emitted from the document scanning light source from the outside of the copying machine is provided. The reflector is formed with an opening serving as a cleaner insertion passage, and a flexible sheet having a light shielding property is provided in the opening so that the opening can be opened and closed.

As a result, the object inside the copying machine, that is, the charger can be cleaned simply by inserting the cleaner from the outside into the opening of the reflector that forms the cleaner insertion passage and operating the cleaner. In addition, the workability of cleaning is greatly improved, and stray light or the like can be prevented from entering the copying machine to maintain excellent copying performance. In addition, it is possible to reduce the size and weight of the copying machine and reduce the cost.

Further, in the copying machine according to the second aspect, a cleaner insertion passage leading to a charging charger for charging the photoconductor is formed through a reflector that reflects light emitted from the original scanning light source from the outside of the copying machine, An opening serving as a cleaner insertion passage is formed in the reflector, and a flexible sheet having a light-shielding property is provided at the inner side position and the outer side position of the opening so as to open and close the opening and face each other. It has a structure.

Thereby, in addition to the above-described effects, it is possible to reliably eliminate the transmission of light from the flexible sheet and the intrusion of stray light.

Further, in the copying machine according to the third aspect, a cleaner insertion passage leading to a charging charger for charging the photoconductor is formed via a reflector that reflects light emitted from a document scanning light source from the outside of the copy, and Both openings serving as cleaner insertion passages are formed in the reflector and the charger case of the charger, and a flexible sheet having a light-shielding property is provided in each of these openings so that the opening can be opened and closed. The flexible sheet has light reflectivity and forms a part of the reflector, while the flexible sheet on the charging charger case side has conductivity and forms a part of the charger case. Is.

As a result, in addition to the above effects, the degree of freedom in designing the copying machine is increased, and the gap between the reflector and the charger is minimized to further reduce the size and weight of the copying machine and further reduce the manufacturing cost. It has the effect of being able to promote it.

Further, the copying machine according to claim 4 is provided with a cleaner insertion passage which leads to a charging charger for charging the photoconductor through a reflector which reflects light emitted from a document scanning light source from the outside of the copying machine, An opening serving as a cleaner insertion passage is formed in the reflector, and a flexible sheet having a light-shielding property is provided at a position on the reflector in the opening so that the opening can be opened and closed. The cleaner insertion part is formed in the cleaner insertion part so that when the inserted cleaner moves in the charger line direction of the charging charger, the flexible sheet is pushed up by the cleaner and rises above the reflector. Inclined with respect to the moving direction, from the cleaner insertion part to the edge of the flexible sheet A structure in which the inclined edge reaches is formed.

Thus, in addition to the above-described effects, it is possible to smoothly perform the cleaning work on the object in the copying machine, that is, the charger by the cleaner without plastically deforming the flexible sheet.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a schematic structural view showing the internal structure of a copying machine, and FIG. 2 is a cleaner inside the copying machine from outside the machine. Fig. 3 is a schematic view showing the state in which the charger wire of the charging charger is being cleaned by inserting the tip part of Fig. 3, Fig. 3 is a perspective view of the essential parts of the flexible sheet attached to the reflector, and Fig. 4 is attached to the reflector. It is a principal part perspective view which shows the state which has temporarily opened the two flexible sheets by which the cleaner was inserted. 5 and 6 show another embodiment of the present invention, and FIG. 5 is a schematic configuration diagram showing the internal structure of the copying machine,
FIG. 6 is a schematic configuration diagram showing a state in which the tip of the cleaner is inserted into the copying machine from the outside to clean the charger wire of the charging charger. 1 is an exterior body, 2 is a slit, 3 is a light source lamp, 4 is a document holder, 5 is a cleaner insertion passage, 5a is an opening gap of the cleaner insertion passage, 6 is a reflector, 6a is an opening of the reflector, and 7 and 8 are flexible. Sheet, 7a is a longitudinal edge of the sheet, 7b is an inclined edge, 7c is a tongue piece, 8a is a longitudinal edge of the sheet, 9 is a selfoc lens, 10 is a charger, 10a is a charger case, 10b is a charger wire, and 10c is a charger. An opening of the case, 11 is a photosensitive drum, and A is a cleaner.

Claims (4)

[Claims] 1. A cleaner insertion passage is formed through a reflector that reflects light emitted from an original scanning light source from the outside of a copying machine and leads to a charging charger that charges a photosensitive member. The reflector is provided as a cleaner insertion passage. An opening is formed in the copying machine, and a flexible sheet having a light shielding property is provided in the opening so that the opening can be opened and closed. 2. A cleaner insertion passage is formed through a reflector that reflects light emitted from a light source for scanning an original from the outside of the copying machine and leads to a charger that charges a photoconductor. Is formed, and a flexible sheet having a light-shielding property is provided at the inboard side position and the outboard side position of the opening so as to be able to open and close the opening and face each other. Copier. 3. A charging charger case of the reflector and the charging charger, wherein a cleaner insertion passage leading to a charging charger for charging a photoconductor is formed through a reflector for reflecting light emitted from an original scanning light source from the outside of the copying machine. Both openings are formed as a cleaner insertion passage, and a flexible sheet having a light blocking property is provided in each of these openings so that the opening can be opened and closed, and the flexible sheet on the reflector side is light-reflecting. And a part of the reflector, and the flexible sheet on the side of the charger case has conductivity and forms a part of the charger case. . 4. A cleaner insertion passage is formed through a reflector that reflects light emitted from an original scanning light source from the outside of the copying machine and leads to a charging charger that charges a photoconductor. The cleaner insertion passage is formed in the reflector as a cleaner insertion passage. An opening is formed, and a flexible sheet having a light shielding property is provided at a position on the reflector in the opening so that the opening can be opened and closed, and a notched cleaner insertion portion is formed in the flexible sheet. In the cleaner insertion portion, when the inserted cleaner moves in the charger line direction of the charging charger, the flexible sheet is pushed up by the cleaner and rises above the reflector, with respect to the cleaner movement direction. The sloped edge that slopes and reaches the edge of the flexible sheet from the cleaner insertion part Copier, characterized by being made.