JPS6157617B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device for a copying machine.

FIG. 1 shows an example of a conventional copying machine, in which a document mounting table 2 made of transparent glass is provided at the top of the main body 1, and a halogen light source serving as an illumination light source for illuminating the document is provided below it. A lamp 3 and a first mirror 4 that moves integrally with the lamp 3 and reflects light reflected from the original onto a second mirror 5 are arranged. The second reflecting mirror 5 is different from the first reflecting mirror 4.
It moves in the same direction as the first reflecting mirror 4 at 1/2 the speed and projects the reflected light from the original onto a photoreceptor (not shown) disposed below. cover 6
can be freely opened and closed around the plate reinforcing portion 7, and an intake hole 9 is provided in the lower side plate 8 for introducing outside air into the copying machine. A cross-flow fan 11 is provided near the intake hole 9, and a bracket 12 is disposed above the cross-flow fan 11.
The cooling air sent out by the
The halogen lamp 3 and the original table 2 heated by the lamp are cooled. This conventional bracket 12 has the appearance function of shielding light by moving the halogen lamp 3, but when the cross-flow fan 11 blows air, the surrounding air gathers on the cross-flow fan 11. The disadvantage was that it generated noise.

The object of the present invention is to provide a device which eliminates the above-mentioned drawbacks.

The present invention will be explained below with reference to the illustrated embodiments.

In FIG. 2, a slit 1 is formed in the bracket 12 by punching out a part of it and bending it.
2b is formed, and a guide plate 14 is fixedly provided above the bracket 12. The guide plate 14 and the slit 12b constitute cooling air guide means that regulates the direction of air flow and the amount of intake air within the copying machine, and forms a cooling air passage for circulating cooling air within the machine. A part of the air that has been blown by the once-through fan 11 and has a cooling effect is guided by the guide plate 14, passes through the slit 12b of the bracket 12, and flows into the once-through fan 11 again, so that the air above the bracket flows into the once-through fan 11. The air flows in smoothly and prevents the generation of noise due to air blowing. By making the slit 12b into a louver shape, the cross-flow fan 1 can be used without interfering with the air flow.
1 can be prevented from being seen from the outside.
Note that a heater 16 is provided in the duct 13, the temperature of the air sent out by the once-through fan 11 is controlled by a temperature control circuit 17, and a part of the warmed air is recirculated. It is possible to efficiently prevent dew condensation from forming on the back surface of the mirror 2 and the mirrors 4 and 5.

Furthermore, as shown in FIG. 4, using a movable recirculation amount adjusting plate 18 installed near the intake of the once-through fan,
It is also possible to selectively determine optimal conditions for noise prevention and dew condensation prevention. The adjustment plate 18 may be operated automatically in conjunction with a device for detecting dew condensation conditions, or may be operated manually.

According to the present invention, since the air inside the copying machine flows back to the once-through fan under optimal conditions, it is possible to prevent the generation of noise due to the air blown by the once-through fan and to efficiently prevent dew condensation inside the copying machine.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a part of a conventional copying machine, Fig. 2 is a front view of an apparatus using a cross-flow fan showing an embodiment of the present invention, Fig. 3 is a plan view of the bracket, and Fig. 4. FIG. 3 is a front view showing another embodiment. 2... Document placement table, 11... Once-through fan, 12... Bracket, 12b... Slit, 16... Heater,
18...Adjustment board.

Claims (1)

[Claims] 1. An illumination light source that illuminates the original to be copied, a cooling once-through fan that cools the parts heated by this light source, and a copying machine that allows outside air to flow into the machine using the cooling once-through fan. In a copying machine having an intake hole provided in a side plate, the fan is provided in the vicinity of the intake side of the cooling once-through fan in the copying machine to regulate the direction and amount of air intake, and to circulate cooling air within the copying machine. A cooling device for a copying machine, comprising a cooling air guide means for forming a cooling air passage.