JPH0451131A - Light source unit driver for copying machine - Google Patents

Abstract

PURPOSE:To prevent a guide shaft from deflecting by the weight of a light source part and a reflection part by providing the guide shaft which supports a light source unit, a support frame which supports both end parts of the guide shaft, and a support member which supports the center part of the guide shaft at least one place. CONSTITUTION:Both the end parts of the guide shaft 102 are supported on side frames 101 and 101 and the center part of the guide shaft 102 is supported by a support member 105 fixed to a front frame. The light source part 106 and reflection part 107 which constitute a light source unit, on the other hand, are provided with pulleys 106b and 107b rotatably through rotary shafts 106a and 107a and the light source unit and reflection part 107 are supported on the guide shaft 102. Therefore, even when the light source part 106 and reflection part 107 of the light source unit are positioned at the center part at the time of exposing operation, the guide shaft 102 is supported by the support member 105. Consequently, the guide shaft is prevented from deflecting and a formed image is therefore prevented from coming to out of focus.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a light source unit drive device for a copying machine, and more particularly to a support member that supports a guide shaft that supports and guides a light source unit.

[Conventional technology]

Generally, exposure apparatuses are widely known in which a light source section and a reflecting section irradiate light onto a document while moving. Such an exposure apparatus is provided with a guide shaft that supports and guides the moving light source section and reflecting section. This guide shaft is simply supported and fixed at both ends to the frame.

[Problem to be solved by the invention]

However, if the guide shaft is supported only at both ends, when the light source section and the reflecting section move and are positioned at the center, the guide shaft will bend due to the weight of the light source section and the reflecting section, and this bending will cause the light source to There is a problem in that the image formation becomes blurred due to changes in the distance between the reflecting section and the document. Furthermore, if the diameter of the guide shaft is increased in order to prevent such deflection, the weight will increase, and if the material is changed to a material with high rigidity, the cost will increase.

The present invention has been made in view of the above-mentioned problems, and provides a light source unit drive device for a copying machine that can prevent a guide shaft from being bent due to the weight of the light source section and the reflecting section. With the goal.

[Means to solve the problem]

The present invention provides a light source unit driving device for driving a drivable light source unit that includes a light source section that irradiates light onto a document and a reflection section that reflects light reflected from the document, and a light source unit driving device that guides the driving direction of the light source unit. The light source unit is also characterized in that it includes a guide shaft that supports the light source unit, a support frame that supports both ends of the guide shaft, and a support member that supports the center portion of the guide shaft at at least one location.

[Effect]

The light source unit is driven and the document is irradiated with light from the light source. At this time, the light source unit moves along the guide shaft, but since this guide shaft is also supported by the support member at its center, the guide shaft does not bend even when the light source unit is located at the center. It is possible to support the light source unit without any need for support.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view (view taken along arrow 1-I in FIG. 2) showing a drive device for a light source unit according to the present invention. Code 1 in the diagram
01 is a side frame, and this side frame 101.10
1 supports both ends of a guide shaft 102. Also,
This guide shaft 102 is connected to the front frame 1 as shown in FIG.
The center portion of the guide shaft 102 is supported by a support member 105 fixed to the guide shaft 103 with a bolt 104. on the other hand,
Light source section 106 and reflection section 107 that constitute light source unit U
are rotatably provided with pulleys 106b and 107b via rotating shafts 106a and 107a, respectively, and when the pulleys 106b and 1107b are rotatably placed on the guide shaft 102, the light source section 106 The reflecting section 107 is supported by the guide shaft 102 . The light source section 106 includes a light source 108, a glue flap 111 for condensing the light from the light source 108 onto the original 110 on the mounting table 109, and a glue flap 111 for receiving and further reflecting light reflected from the original 110. A reflecting mirror 112 is housed therein. Further, within the reflecting unit 107, reflecting mirrors 113 and 113 for receiving and reflecting the reflected light from the reflecting mirror 112 are housed.

The operation of operating the light source unit U configured in this manner to perform exposure will be described below.

First, by driving the light source unit U, the light source section 106 and the reflecting section 107 are moved along the guide shaft 102. At this time, the light source 108 in the light source section 106 is turned on, and the light is focused and reflected by the reflector 111 to irradiate the original 110 placed on the mounting table 109 with the light.

Then, the reflected light from this original 110 is received by a reflecting mirror 112, and the reflected light from this reflecting mirror 112 is further reflected by a reflecting unit 1.
The light is irradiated onto the reflecting mirrors 113 and 113 in 07. and,
Light having image information reflected by the reflecting mirror 113 is recorded on a photosensitive recording medium (not shown). Note that during this exposure operation, the light source section 106 and the reflecting section 10 of the light source unit U
Even when the guide shaft 102 is located at the center, the guide shaft 102 is supported by the support member 105, so that it is possible to prevent large deflection, and furthermore, it is possible to prevent the image formation from becoming blurred. .

〔Effect of the invention〕

By configuring the present invention as described above, it is possible to prevent the guide shaft from being bent, and furthermore, it is possible to prevent the image formation from becoming blurred. In addition, since deflection can be prevented with a simple configuration, it can be implemented at low cost. Furthermore, since there is no need to increase the diameter of the guide shaft, it is possible to prevent the overall size of the device from increasing.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a front cross-sectional view (I-I arrow view in Fig. 2) showing a driving device for a light source unit according to the present invention, and Fig. 2 is a front sectional view showing a driving device for a light source unit according to the present invention. FIG. 2 is a side cross-sectional view (m-m arrow view in FIG. 1) showing the drive device. 101... Side frame (support frame), 102...
- Guide shaft, 105... Support member, 106... Light source section, 107... Reflection section, 110... Document, U... Light source unit.

Claims (1)

[Claims] In a light source unit drive device for a copying machine that drives a drivable light source unit that includes a light source unit that irradiates light onto a document and a reflection unit that reflects light reflected from the document, the drive direction of the light source unit is guided. A copying machine further comprising: a guide shaft that supports the light source unit; a support frame that supports both ends of the guide shaft; and a support member that supports the center portion of the guide shaft at at least one location. Light source unit drive device.