JP3152460B2 - Exposure illumination device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exposure illuminating device for illuminating a document to be copied by moving a light source together with an exposure scanning system, and more particularly to a light source mounting structure.

[0002]

2. Description of the Related Art In a recent copying machine, a fluorescent lamp is used as a light source for exposing a document in order to improve copying speed and save power consumption. However, the fluorescent lamp has a characteristic that the light amount at the end is extremely smaller than the light amount near the center, and in fact, when used in a copying machine, the maximum exposure width in the copying machine (for example, the paper size A3 can be used) In the model, a fluorescent lamp whose both ends are longer (about 50 mm) than the short paper (297 mm) is attached to the holding member.

[0003] Since a fluorescent lamp longer than the maximum exposure width is used, it is difficult to remove and attach the fluorescent lamp only when removing the contact glass on which a document is to be placed in maintenance of the equipment or replacement of the fluorescent lamp. Therefore, there is a problem in that the upper cover of the device body and the ADF installed on the upper cover must also be removed.

[0004]

In order to solve such a problem, a light source and its electrode are formed into a cartridge so that only the light source is detachable from the main body of the apparatus.
2. Description of the Related Art There has been known a device in which a light source is moved in a lateral direction of a device and attached and detached. (Japanese Utility Model Application Laid-Open No. 63-57643,
6724 reference), however, when moving the light source in the lateral direction, is next to the light source unit control panel or electrical components, there is a driving member and the protective cover, always the easy exchange
Also Iezu, also intended to cartridge the light source there is a problem that too expensive.

[0005]

According to the present invention, there is provided a contact glass for placing a document on which a document is set, and a holding member disposed below the contact glass so as to cross the contact glass in a maximum exposure width direction. A tubular light source supported by the holding member, longer than the maximum exposure width, and shorter than the length of the contact glass in the longitudinal direction,
An exposure illumination device that reads the document by scanning the holding member in the longitudinal direction while irradiating the document with the tubular light source has an axis perpendicular to the contact glass, and the holding member is a surface parallel to the contact glass. It is characterized in that it is rotatably supported by. In the exposure lighting device according to the present invention, when the holding member is rotated by a predetermined amount in a predetermined direction,
It has a stopper member for restricting the rotation of the holding member.

[0006]

According to the present invention, a holding member having a tubular light source longer than the maximum exposure width and shorter than the length in the longitudinal direction of the contact glass is fixed on an axis perpendicular to the contact glass,
Since the holding member is rotatably supported on the surface parallel to the contact glass, when the holding member is rotated, the light source is directed in the longitudinal direction of the document table, and the light source can be replaced from the longitudinal direction of the document table. Further, when the holding member rotates by a predetermined amount, the rotation is restricted by a stopper member on a plane parallel to the contact glass, so that the holding member is fixed when the light source is attached or detached.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 4, reference numeral 1 denotes a copying machine, and a contact glass 2 is provided on an upper surface 1a of the copying machine 1 as a document table.
Is wider than the maximum exposure width (for example, a paper short dimension in a model capable of using the paper size A3) and is substantially flush with the upper surface 1a.

[0008] In the machine located below the glass 2, FIG.
Is provided, and this apparatus A is scanned in the direction of the arrow shown in FIGS.

The exposure illuminator A is provided with a fluorescent lamp 3 which is a tubular light source for illuminating a document in a direction crossing the contact glass 2. As shown in FIG. 2, the fluorescent lamp 3 has both ends extending longer than the maximum exposure width, and both ends are held by a pair of sockets 5 provided on a holding member 4, and the original in the copying process is It emits light at the time of reading, and illuminates a document placed on the contact glass 2 via an auxiliary reflector 6 fixed to the holding member 4 directly and in parallel with the fluorescent lamp 3. Also,
As shown by the dashed line in FIG. 3, the image of the illuminated document is
The light path bent by the mirror 9 provided in the lower scan body 8, is illuminated mirrors, not shown, by the exposure optical system including a lens onto a photosensitive optical body.

The scanner main body 8 is reciprocated on guide rails 7 and 7 arranged in the apparatus by a driving device that drives a wire or a belt (not shown) connected to the scanner main body 8 by a motor by a predetermined amount. Has become. As shown in FIGS. 1 and 2, the holding member 4 is pivotally supported by a shaft 10 at a substantially center in the longitudinal direction of the scanner main body 8. Reference numeral 11 denotes a retaining ring.

The holding member 4 has a leg 4a integrally formed on the side edge thereof, which is detachably attached to the scanner body 8 with a screw 12.

In the replacement work of the fluorescent lamp 3 in the exposure illuminating apparatus A thus configured, first, the contact glass 2 is removed from the upper surface 1a of the copying machine, and the fixing screw 1 of the holding member 4 is removed.
Remove 2. Then, as shown in FIG. 5, by rotating the holding member 4 about the shaft 10, the fluorescent lamp 3 can be set within the maximum exposure width. For this reason, the fluorescent lamp 3 longer than the maximum exposure width
Can be replaced inside the device without interfering with other members.

In the following, some embodiments will be described, but members similar to those of the first embodiment described above will be described.
The same reference numerals as in the first embodiment denote the same parts, and a description thereof will be omitted.

FIG. 6 shows a second embodiment of the present invention. In this embodiment, the rotation center of the holding member 4 in the first embodiment is shifted from the center to the end, and the holding member 4 is moved around the end.
Can be swung.

That is, a holding member 4 is swingably supported by a shaft 10 at one end (front side in the figure) of the scanner main body 8 which moves on the guide rail 7. The holding member 4 is flat,
The leg 4a is fixed to the scanner main body 8 with screws.

A pair of arms 8a are formed on the scanner body 8 in the rail extending direction, and the auxiliary reflector 6 is fixed to the arms 8a so as to be parallel to the scanner body 8.

As in the first embodiment, the worker removes the fixing screw 12 and swings the holding member 4 about one end thereof as in the first embodiment. The direction of the fluorescent lamp 3 is changed so that the fluorescent lamp 3 does not interfere with other members inside the apparatus.

In the above-described first and second embodiments, the holding member 4 is rotated (oscillated) with respect to the scanner main body 8.
In this case, the fluorescent lamp 3 is attached and detached, but at this time, there is a possibility that the holding member 4 may rotate without permission of the operator. In other words, when attaching or detaching a fluorescent lamp from a socket, generally, one end of the fluorescent lamp is pushed into one socket side, and a gap is provided between the opposite socket and the fluorescent lamp to be detached or attached. Since both ends are simultaneously inserted into both sockets from both sides thereof, and then the fluorescent lamp is rotated and attached / detached, an excessive force is applied to the holding member 4 and the holding member 4 is turned against.

Therefore, in order to further improve the detachability of the fluorescent lamp 3, a stopper member 20 shown in FIGS. 7 and 8 for regulating the operation of the holding member 4 is arranged on the first and second scanner main bodies 8. Is a third embodiment of the present invention.

7 and 8, the stopper member 20 is used.
Is a short cylindrical case 22 having an opening 21 formed in a part of the peripheral wall, a release lever 23 having a non-slip inserted into the opening 21, a compression coil spring 24 for pushing up the release lever 23, and a release lever 23. And a pin 25 that moves up and down in the cylindrical body 22 provided at the center. When the holding member 4 is fixed to the scanner main body 8, the stopper member 20 moves the lever 23 when the top of the pin 25 is pressed down by the holding member 4 and the release lever 23 is lowered, and when the holding member 4 rotates. It is attached to a portion of the scanner body 8 that can be pressed down with a fingertip.

That is, when the stopper member 20 is provided in the first and second embodiments, as shown in FIGS.
When the holding member 4 rotates by a predetermined amount, the release lever 23 is disposed at a position on the upper surface of the scanner main body 8 that is not hidden by the moved holding member 4. The holding member 4 has a hole 2 that fits with the pin 25 when it has rotated a predetermined amount in a predetermined direction.
6 are drilled.

As described above, by providing the stopper member 20 and the hole 26 in the scanner body 8 and the holding member 4, the fluorescent lamp 3
When the holding member 4 is rotated (oscillated) in a predetermined direction for attaching and detaching the pin 25, the pin 25 and the hole 26 are rotated at a predetermined angle.
The release lever 23 is moved upward by the spring 24 as shown in FIG. 8, the pin 25 is fitted into the hole 26, and the rotation of the holding member 4 is restricted. That is, the holding member 4 in the above two embodiments is fixed at a predetermined position in the state shown in FIGS. 9 and 10, and unnecessary rotation of the holding member 4 at the time of replacement work is prevented.

In order to return the fluorescent lamp 3 to a predetermined position, the release lever 23 is pressed down with a finger to remove the pin 25 from the hole 26, the holding member 4 is freed, and the scanner body 8 is rotated to the upper side. Screw in.

The above-mentioned predetermined position of the fluorescent lamp 3 indicates a position fixed to the scanner main body 8, and the predetermined amount of the holding member 4 means that when the holding member 4 is rotated,
Means the rotation (displacement) angle of the detachable holding member 4 from a predetermined position without interfering with the inside of the device.

[0025]

As described above, according to the present invention, the light source of the exposure illuminating apparatus can be stably exchanged and detached with a simple structure at low cost without causing interference inside the apparatus, thereby improving workability.

[Brief description of the drawings]

FIG. 1 is a perspective view of an exposure illumination apparatus showing a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of FIG. 4XX.

FIG. 3 is an enlarged sectional view of FIG. 2Y-Y.

FIG. 4 is a plan view of a copying machine embodying the present invention.

FIG. 5 is a perspective view showing the operation of the support member in the first embodiment.

FIG. 6 is a perspective view of an exposure illumination device according to a second embodiment of the present invention.

FIG. 7 is a side sectional view showing a structure of a stopper member.

FIG. 8 is an operation diagram showing an operation of a stopper member.

FIG. 9 is an enlarged perspective view showing an operation state of a stopper member provided in the first embodiment.

FIG. 10 is an enlarged perspective view showing an operation state of a stopper member provided in the first embodiment.

[Explanation of symbols]

 2 Contact glass 3 Tubular light source 4 Holding member 10 Vertical axis 20 Stopper member A Exposure illumination device

Claims (4)

(57) [Claims] 1. A contact glass for placing a document on which a document is set, a holding member disposed below the contact glass so as to cross the contact glass in a maximum exposure width direction, and supported by the holding member; A tubular light source that is longer than the maximum exposure width and shorter than the length of the contact glass in the longitudinal direction, and scans the holding member in the longitudinal direction while irradiating the document with the tubular light source. An exposure illuminating apparatus for reading an image, wherein the holding member is rotatably supported on a plane parallel to the contact glass on an axis perpendicular to the contact glass. 2. The exposure illuminating device according to claim 1, wherein the shaft is provided near the longitudinal center of the tubular light source in the holding member. 3. The exposure illuminating device according to claim 1, wherein the shaft is provided at one end of the holding member in a longitudinal direction of the tubular light source. 4. An exposure illuminating apparatus according to claim 1, further comprising a stopper member for restricting the rotation of said holding member when said holding member is rotated by a predetermined amount in a predetermined direction. .