JP2002320072A - Original reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image reader with a mechanism that cleans dust and an image drawing agent hardly eliminated on a contact glass plate with a simple operation. SOLUTION: The image reader is provided with a cleaning mechanism 2 that can be reciprocated in the main operation direction on an upper part of the contact glass 1. The cleaning mechanism 2 is provided with a cleaning member 3 comprising a sponge 7 and a spatula 8 shaving off the image drawing agent, a guide wire 4, a cleaning device 5 sprinkling a cleaning agent to the cleaning member 3, and a vacuum device 6 that absorbs and removes the dust and image drawing agent removed from the contact glass 1 by the cleaning member 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document reading apparatus which is used in a scanner, a facsimile machine, a copying machine, a multifunction machine thereof, etc., and reads document information by moving a sheet document on an upper surface of a contact glass. And a device having a cleaning member for cleaning the surface.

[0002]

2. Description of the Related Art As described above, it is known to use a sponge or the like as a cleaning member in a mechanism for removing dust by moving a cleaning member disposed on a contact glass. However, at present, no consideration is given to a technique that takes the removal of the drawing agent into account.

One of the problems in reading by a document reading device used in an image forming apparatus such as a copying machine is that an abnormal image due to reading of dust adhering to a contact glass, for example, generation of a black stripe along a sub-scanning direction. is there. If the dust is paper dust, toner powder, shavings of rubber parts, etc., it is relatively easy to remove even if these dusts adhere. In other words, it can be removed from the document to be transported next, or can be removed by dry wiping or the like. However, correction fluid, oil-based ink, glue, and the like (these are referred to as drawing agents in this specification) are:
Once adhered to the contact glass, it sticks and becomes difficult to remove by dry wiping. As a result, black streaks are continuously generated in the formed image, which is likely to be a complaint from the user.

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and has as its object to provide a document reading apparatus having a mechanism for cleaning a difficult-to-remove drawing agent by a simple operation. .

[0005]

According to a first aspect of the present invention, there is provided an original reading apparatus, wherein the cleaning member disposed on a contact glass is reciprocated in a main scanning direction to achieve the above object. A document reading apparatus having a device for removing dust and the like on glass is characterized in that in addition to the cleaning member, a plate member for shaving off a drawing agent such as a correction liquid is provided.

According to a second aspect of the present invention, in order to achieve the above object, in the original reading apparatus according to the first aspect, the removing device includes means for spraying a cleaning agent near the cleaning member. It is characterized by.

According to a third aspect of the present invention, in order to achieve the above object, in the original reading apparatus according to the first or second aspect, the one which is wiped off by the cleaning member or the one which is scraped off by the plate is sucked. It is characterized by comprising means.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a main part of an embodiment of a document reading apparatus according to the present invention. In the figure, reference numeral 1 denotes a contact glass, which is provided with a cleaning mechanism 2 capable of reciprocating above the contact glass in the main scanning direction. The cleaning mechanism 2 includes a cleaning member 3 and a pair of wires 4 and 4 for driving and guiding the reciprocating movement of the cleaning member 3 in the main scanning direction, a cleaning device 5 for cleaning the cleaning member 3, and a contact glass 1 for the cleaning member 3. A vacuum device 6 is provided for sucking and removing dust and a drawing agent removed from the image forming apparatus.

As shown in FIG. 2, the cleaning member 3 includes a sponge 7 for removing paper dust and the like from the surface of the contact glass 1 and a plastic spatula for scraping off a drawing agent stuck on the surface of the contact glass 1. 8 is provided.
In the illustrated example, a spatula 8 is provided between the pair of sponges 7.
However, the present invention is not limited to the configuration of the example, and the number and arrangement of the sponges 7 and the spatula 8 can be appropriately changed.

The operating range (reciprocating motion range) of the cleaning member 3 in the main scanning direction is larger than the length of the contact glass 1 in the main scanning direction. Further, the standby position of the cleaning member 3, that is, the home position is set outside the contact glass 1 as shown in FIG.

The cleaning device 5 is disposed immediately below the standby position of the cleaning member 3. The cleaning device 5 includes a nozzle 9 for spraying a cleaning agent, a pump 10,
And a tank 11 for holding a cleaning liquid.
The drawing agent is difficult to remove by dry wiping, but can be easily removed by wiping with a member impregnated with a cleaning agent or the like mainly composed of alcohol or the like. The cleaning liquid is selected from a material suitable for such wiping.

Before the cleaning member 3 cleans the upper surface of the contact glass 1, the cleaning agent is supplied to the tank 1.
From 1, it is carried by a pump 10, sprayed from a nozzle 9, sprayed with a certain amount of a cleaning agent, soaked into a sponge 7, and then operated to clean the contact glass 1. That is, the paper powder and the toner powder are removed by the sponge 7, and the drawing agent such as the correction liquid is removed by scraping or scraping off by the spatula 8.

The vacuum device 6 is provided on the opposite side of the operating range of the cleaning member 3 from the side on which the cleaning device 5 is provided. Dust and drawing agent powder removed from the contact glass 1 by the cleaning member 3 are applied to the cleaning member 3, especially the sponge 7.
It gets stuck in. In the present embodiment, if the next cleaning operation is performed while the powder of the drawing agent once removed remains attached, the powder adhering to the sponge 7 will adhere to the contact glass 1 again. It is to prevent.

The vacuum device 6 includes a collection member 13 having a suction port 12, a pump 14, and a dust collection tank 15. The suction port 12 has an opening size that allows the sponge 7 and the spatula 8 of the cleaning member 3 to enter. Then, when the cleaning member 3 that has performed the cleaning operation of the contact glass 1 comes over the suction port 12 beyond the contact glass 1, the pump 14 is driven to adhere to the sponge 7 or the spatula 8 of the cleaning member 3. The dust and the drawing agent are removed from the suction port 12 by suction. For this reason, when the cleaning member 3 returns to the standby position, the sponge 7 and the spatula 8 are in a state in which dust and the drawing agent have not adhered, and reattachment to the contact glass 1 is prevented.

[0015]

As described above, in the original reading apparatus according to the first aspect of the present invention, the spatula member for the cleaning member for sweeping dust and the like on the contact glass to scrape the drawing agent such as the correction liquid is used. Is added, paper powder and toner powder can be removed with a cleaning member such as a sponge, and the drawing agent can be removed with a spatula material.

According to the second aspect of the present invention, as described above, the document reading apparatus includes the means capable of spraying the cleaning agent near the cleaning member.
There is an effect that a drawing agent that cannot be easily removed by dry wiping can be easily removed by a cleaning agent mainly containing alcohol or the like.

According to the third aspect of the present invention, as described above, since the document reading device is provided with the means for sucking the material scraped off by the spatula material, in addition to the above common effects, the cleaning of the wiping portion of the cleaning member is performed. By doing so, there is an effect that the re-adhesion of dust to the contact glass is eliminated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of an embodiment of a document reading apparatus according to the present invention.

FIG. 2 is an enlarged perspective view showing a cleaning member of the embodiment device of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contact glass 2 Cleaning mechanism 3 Cleaning member 4 Wire 5 Cleaning device 6 Vacuum device 7 Sponge 8 Spatula 9 Nozzle 10 Pump 11 Tank 12 Suction port 13 Collection member 14 Pump 15 Dust collection tank

Claims (3)

[Claims] 1. A document reading apparatus having a device for removing dust and the like on the contact glass by reciprocating a cleaning member disposed on the contact glass in a main scanning direction, in addition to the cleaning member, a correction liquid and the like. A document reading device comprising a spatula material for scraping off the drawing agent. 2. The original reading apparatus according to claim 1, wherein said removing device includes means capable of spraying a cleaning agent near said cleaning member. 3. The original reading apparatus according to claim 1, further comprising: means for sucking the one wiped off by the cleaning member or the one scraped off by the spatula material.