JPS60119540A - Platen glass fitting device of copying machine - Google Patents

Abstract

PURPOSE:To adjust the upper/lower fitting position of platen glass easily and precisely by fitting an external frame which has an opening part covered with glass to a copying machine frame with bolts engaged threadably with screw holes. CONSTITUTION:The platen glass 8 is fitted and adhered in the opening part 11 of the external frame 6 made of an extruded material, etc., and the external frame 6 is linked with the housing 2 of a lighting mechanism A by a linking mechanism 7. When the 2nd bolt 15 and lock nut 16 of the linking mechanism are clamped, the 1st bolt 14 is clamped and loosened to move up and down a fitting piece 10 to and away from the top surface 2a of the housing and thus the upper/lower fitting position of the glass 8 is adjusted easily and precisely to adjust the distance from the glass top surface to the center of a photosensitive body 19 accurately. Further, the platen glass 8 is protected by the external frame 6 during inspection and maintenance, so a breakage in the glass 8 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for attaching a platen glass of a copying machine to a main body of the copying machine or the like.

Conventional technology: In the case of an original scanning type exposure device that moves the original along the platen glass and exposes it, the platen glass is used to copy only at both ends of the original, avoiding the original entry/ejection area. It cannot be kept attached to the machine body, etc.

Further, it is difficult to form holes, screw holes, etc. in the platen glass.

For this purpose, as shown in the second quotient in Fig. 1, the copying machine main body a
A platen glass mounting device is installed around the periphery of the mounting opening of the platen glass C, and the holding member df is held in contact with both ends Cnt and C11/ of the platen glass C, which are kept away from the original entry/exit area c'+c/', and the mounting opening is Lower edge adjustment bolt d,
'1, press 5 onto the bottom surface of the platen glass C, and use this adjusting bolt e to move the photoconductor f from the top surface of the platen glass C.
The distance Lsk to the center f' can be adjusted.

L, rudder: If this is an attached device, in order to adjust it to the platen glass mounting device, it is necessary to rotate the adjustment bolt ek from the bottom of the platen crow C, which is cumbersome and requires fine adjustment. Therefore, it is difficult to adjust the distance LIk from the upper surface area of the platen glass C to the photoreceptor center f' with high precision.

The aforementioned distance from the top surface of the platen glass to the center of the photoreceptor is important in forming an original image as an electrostatic latent image on the photoreceptor, and if the distance cannot be adjusted accurately, copy quality will deteriorate.

OBJECTS OF THE INVENTION It is an object of the invention to enable the vertical mounting position of a platen glass to be easily and precisely adjusted with respect to the main body of a copying machine.

Structure of the invention A platen crow is attached to the outer frame [7. This outer frame is attached to the main body of a copying machine, etc.

Embodiment The main body 1 of the copying machine is provided with a housing 2 for an illumination device 14A, and a main reflector 4 having a built-in lamp 3 therein;
An auxiliary reflecting mirror 5 is provided, and an outer frame 6 made of extruded aluminum or the like is connected to the upper part of the housing 2 in a connection-like manner, and a platen glass 8 is fixed to the outer frame 6 with adhesive. be. The outer frame 6 is integrally formed with mounting pieces 10.1 (1) on the left and right sides of the plate-like main body 9, and the plate-like main body 9 has an opening 11 opened on the lower surface and a recessed part 12 opened on the upper surface, The platen glass 8 is fitted into the recess 12 and is torn apart, and is adhered and fixed to the portion other than the opening I with the adhesive 13]7.

both end surfaces 8a of the platen glass 8 in the document movement direction;
f3h is a sacral slope, and the upper surface 9a of the side of the plate-like main body 9 in the document movement direction is lowered by the upper surface 8C of the platen glass 8, and the upper surface 9h of the other side is flush with the upper surface 8C of the platen glass 8. At the same time, the corner portions 1212 and +2b on both sides in the document movement direction of the recessed portion 12 have a shape into which the platen glass side portions 8' and 8'' are fitted, so that the platen glass 8
In addition, a feeding baffle 20 is abutted against one end surface 8a of the plate-like main body 8, and the upper surface 9 of the other side of the plate-like main body 9
A discharge baffle 21 is provided continuously from h, so that the original can be smoothly moved along the upper surface 8C of the platen crow.

The connecting mechanism consists of a hollow first bolt 14, a second bolt 15 inserted into the hollow part of the first pole +4, and a lock nut 16 screwed into the first bolt 14,
The first bolt 14 is screwed into the threaded hole 17 of the piece 10 and comes into contact with the upper surface 2a of the housing 2.The second bolt 15 is screwed into the upper surface 2a of the housing from the hollow part 14α of the first bolt 14. While screwing into the hole 18, the lock nut 1
6 is tightened to the top surface 10α of the mounting piece, and each connection mechanism
7 is the inlet baffle 20 and the discharge baffle 2I.
covered with.

Since it is like this, the second bolt 15 and lock nut 16
With the bolts loosened, tighten the first bolt! 4 is tightened and loosened, the mounting piece 10 moves up and down with respect to the housing top surface 2a, so the vertical position of the platen glass 8 can be adjusted easily and precisely from above, and the platen glass top surface 80 is exposed to light. Distance to center 1'M of body 19.

′? can be adjusted with high precision.

After the adjustment is completed, the mounting piece 10 can be fixed to the housing upper surface 2a by tightening the lock nut 16 and the second bolt 15.

Alternatively, the outer frame 6 may be fixed to the copying machine main body 1.

Effects of the Invention Since the vertical mounting position of the outer frame 6 can be adjusted easily and accurately, the vertical position of the platen crow 8 relative to the copying machine body 1 etc. can be easily adjusted with high precision.

Since the platen glass 8 is attached to the outer frame 6, inspection and
It is possible to prevent the platen glass 8 from being damaged due to being shielded by the outer frame 6 during maintenance.

[Brief explanation of drawings]

Figures 1 and 2 are a plan view and a vertical sectional view of the conventional example, and Figures 3 to 3 are
FIG. 5 shows an embodiment of the present invention, FIG. 3 is an overall sectional view,
FIG. 4 is a perspective view of the outer frame, and FIG. 5 is a sectional view of the coupling mechanism. 1 is the copying machine body, 6t is the outer frame, and 8 is the platen glass. Applicant: Fuji Xerox Co., Ltd. Agent: Patent Attorney: Masaaki Yonehara

Claims (1)

[Scope of Claims] A platen glass 8 is placed on an outer frame 6 having an opening 11 and a screw hole 17 for attachment so as to extend beyond the opening +1ffifi, and the outer frame 6 is screwed into the screw hole 17. 1. A platen glass mounting device for a copying machine, characterized in that the platen glass mounting device is mounted to a copying machine main body 1, etc. using bolts.