JPH11275283A - Document reading device - Google Patents

Abstract

(57) [Problem] To provide a document reading device capable of performing maintenance without removing a screw. SOLUTION: The apparatus main body 101 of the document reading apparatus is openable and closable with respect to a base 106 of the apparatus. The other end of the gas spring 102, one end of which is locked to the apparatus main body 101, is supported by a support rod 104 by a support shaft 103.
One end of the support rod 104 is pivotally supported by the base 106 by a support shaft 105, and a U-shaped groove 104a is formed at the other end. Further, the support rod 10 is provided on the apparatus main body 101.
A fixing member 107 that engages with the fourth groove portion 104a is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an original reading apparatus applied to a copying machine, a scanner, a facsimile, and the like.
In particular, the present invention relates to a technique for improving an opening / closing mechanism of an apparatus main body during jam clearance and maintenance.

[0002]

2. Description of the Related Art An original reading apparatus reads an original placed on a contact glass from below the original by a carriage. The carriage is equipped with at least an exposure lamp for exposing the original, a group of mirrors for guiding reflected light from the original to the imaging lens, and the like, and reads the original line by line while moving in the sub-scanning direction of the original. .
The apparatus main body of such a document reading apparatus can be released to a device (image forming apparatus) for jam clearance and maintenance. At the time of jam clearance, only the paper jammed inside is removed, so that the opening angle can be small. However, at the time of maintenance, the main body of the apparatus must be largely opened.

[0003]

In the conventional document reading apparatus, it is possible to open the apparatus body by one operation by a gas spring at the time of jam clearance, but to release the gas spring at the time of large opening at the time of maintenance. The fixing screw must be removed, and there is a problem that it takes time to remove the screw. In addition, there is a case where the user forgets to attach the screw at the end of the work, and there is a possibility that the screw is lost.

Accordingly, an object of the present invention is to provide a document reading apparatus capable of performing maintenance without removing a screw.

[0005]

According to a first aspect of the present invention, there is provided an original reading apparatus in which an apparatus main body can be opened and closed with respect to a base of an apparatus. The opening and closing mechanism is provided.

[0006] To achieve the above object, the present invention provides a second aspect.
According to the invention described in claim 1, in the invention described in claim 1, a first support member whose one end is pivotally supported on the base, one end is pivotally supported by the first support member, and the other end is related to the apparatus main body. Second combined
The opening and closing mechanism is constituted by the supporting member.

[0007] In order to achieve the above object, a third aspect is provided.
According to a second aspect of the present invention, in the second aspect, the second support member is a gas spring. In order to achieve the above object, according to the invention described in claim 4, in the invention described in claim 2, a receiving member for receiving an end of the first support member on the side opposite to the pivot side is provided in the apparatus main body. It is characterized by the following.

According to the first aspect of the present invention, since the apparatus main body is opened in two stages, it is not necessary to remove the screws even during maintenance, and the maintenance work efficiency is improved. According to the second and third aspects of the present invention, the first support member stands up only by lifting the apparatus main body at the time of opening in the second stage. According to the fourth aspect of the present invention, since the first support member is held by the receiving member on the apparatus main body side, the holding in the open state is ensured, and the operation is performed safely.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall configuration diagram of a bookbinding document reading apparatus, and FIG. 2 is a detailed configuration diagram of a carriage thereof. As shown in FIG. 1, a contact glass 2 is provided on an upper surface of the frame 1, and a carriage 3 is provided below the contact glass 2. Below the carriage 3, there is a pair of document tables 4 that can move up and down. The carriage 3 is reciprocated right and left in FIG.

As shown in FIG. 2, the carriage 3 has a pair of upper exposure lamps 11 and a pair of lower exposure lamps 12, between which an upper mirror 13, a lower mirror 14, and a common mirror are provided. 15 and 16. The carriage 3 also includes an imaging lens 17 and a CCD 18. Immediately below the lower mirror 14, there is a transparent member 19 for holding the bound original 31 in a double-page spread state. On its side, there is a turning belt 22 that is stretched between a driving roller 20 and a driven roller 21, and a charging roller 23 is in contact with the surface of the turning belt 22.

Further, a pair of pressing sheets 24 are provided opposite to the pair of document tables 4 shown in FIG. 1, and the pressing sheets 24 are taken up by a take-up roll 25, and are always kept horizontally. Tension is applied.

Next, the operation will be described. When reading the sheet document on the contact glass 2, the upper exposure lamp 11 irradiates the document while moving the carriage 3 in the sub-scanning direction of the document by the motor 5 (moving from left to right in the figure). The reflected light from the original passes through the upper mirror 13 and the common mirrors 15 and 16 and is incident on the imaging lens 17.
Further, an image is formed on the CCD 18. The document is read in this manner. Symbol P1 indicates a reading position.

On the other hand, when reading several pages of the bookbinding original 31 while automatically turning the pages, the bookbinding original 31 is set on the document table 4 in a state of being opened as shown in FIG.
Then, the document table 4 is raised, and the facing pages of the bookbinding document 31 are pressed against the pressing sheet 24. Thereafter, the carriage 3 is moved in the sub-scanning direction as described above. At this time, the original is irradiated by the lower exposure lamp 12 via the transparent member 19 (reading position P2), and the reflected light is incident on the imaging lens 17 through the lower mirror 14 and the common mirrors 15, 16. Then, an image is formed on the CCD 18. The document is read in this manner.

While the carriage 3 is moving from left to right in the drawing and reading a document, the turning belt 22 is in a state of being lifted by a certain angle around the driving roller 20. When the reading of both left and right pages of the bound document 31 is completed and the carriage 3 moves to the right end, the turning belt 22 is in a horizontal state as shown in FIG. 2 and comes into contact with the document surface. The surface of the turning belt 22 is the charging roller 2
3, the right end of the document is attracted to the turning belt 22. In this state, the turning belt 22 is lifted again, and the right end of the document is stored in the storage guide 26.
Face to face. Here, when the carriage 3 returns to the left side (home position side), the right end of the document enters the storage guide 26. Then, the page is turned as the carriage 3 moves to the left.

FIG. 3 is a perspective view of the apparatus main body opening / closing mechanism according to the embodiment of the present invention when the first stage is opened, FIG. 4 is a front view of the same when the second stage is opened, and FIG. It is an expansion disassembled perspective view. The apparatus main body 101 of the document reading apparatus (in which the carriage 3 shown in FIGS. 1 and 2 is incorporated) is openable and closable with respect to a base 106 of a device (image forming apparatus).

The other end of the gas spring 102, one end of which is locked to the apparatus main body 101, is connected to a support rod 10 by a support shaft 103.
4 is supported. One end of the support rod 104 is
5, and is supported at the other end by a U-shaped groove 104a. The device body 1
01 is provided with a fixing member 107 that engages with the groove 104 a of the support rod 104.

Next, the opening operation of the apparatus main body 101 will be described. First, at the time of opening the first stage (small opening angle), such as when clearing a jam, a lever (not shown) is used to operate the apparatus main body 10.
Unlock 1 Then, the gas spring 102
As a result, the apparatus main body 101 is lifted up to the state shown in FIG. When the second stage for maintenance (opening angle is large) is opened, the apparatus main body 1 is further moved from the first stage opened state in FIG.
Lift 01. Then, the support rod 104 is pulled up by the gas spring 102 and rises up around the support shaft 105 to be in the state of FIG. In this state, the open state can be maintained by fitting the fixing member 107 of the apparatus main body 101 into the groove 104a at the tip of the support rod 104.

[0018]

According to the first aspect of the present invention, since the apparatus main body is opened in two stages, it is not necessary to remove the screws even during maintenance, and the maintenance work efficiency can be improved.

According to the second and third aspects of the present invention, the first support member can be raised by simply lifting the apparatus main body at the time of the opening in the second stage.

According to the fourth aspect of the present invention, since the first support member is held by the receiving member on the apparatus main body side, the holding in the open state is ensured, and the work can be performed safely.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a bookbinding document reading apparatus.

FIG. 2 is a detailed configuration diagram of a carriage of the bookbinding document reading device shown in FIG. 1;

FIG. 3 is a perspective view of the apparatus main body opening / closing mechanism according to the embodiment of the present invention when the first stage is opened.

FIG. 4 is a perspective view of the apparatus main body opening / closing mechanism according to the embodiment of the present invention when the second stage is opened.

FIG. 5 is an enlarged exploded perspective view of a portion A in FIG. 4;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 frame 2 contact glass 3 carriage 11 upper exposure lamp 12 lower exposure lamp 13 upper mirror 14 lower mirror 15, 16 common mirror 17 imaging lens 18 CCD 19 transparent member 20 drive roller 21 driven roller 22 turning belt 23 Charging roller 24 Pressing sheet 25 Take-up roll 101 Main unit 102 Gas spring 103 Support shaft 104 Support rod 104a Groove 105 Support shaft 106 Base 107 Fixing member

Claims (4)

[Claims] 1. An original reading apparatus in which an apparatus main body is openable and closable with respect to a base of an apparatus, comprising an opening / closing mechanism for opening and closing the apparatus main body in two stages. 2. The first support member according to claim 1, wherein one end of the first support member is pivotally supported on the base.
And a second support member having one end pivotally supported by the support member and the other end engaged with the apparatus main body, thereby forming an opening / closing mechanism. 3. The document reading apparatus according to claim 2, wherein the second support member is a gas spring. 4. The document reading apparatus according to claim 2, wherein a receiving member for receiving an end of the first support member on a side opposite to the pivot side is provided on the apparatus main body.