JPH01202744A - Copying machine - Google Patents

Abstract

PURPOSE:To assure the prevention of inconvenience arising at the time of over- hanging of an original platen of a movable original platen type copying machine by having an arm projection from inside the machine below the original platen, to have the arm support the original platen, in accompany with moving the original platen so that it projects to the side of the machine. CONSTITUTION:A projection 14 is abutted on a pin 15 in accompany with moving the original platen 3 moves, and the arm 4 is projected from the copying machine main body 2 against the energizing force of a spring 20, below the original platen 3, which is projecting to the left side of the machine. As a result, the original platen 3 is supported by the arm 4 with a rubber 17 in between. Thus there will be no damage against a sliderail, etc., the processing of jamming can be carried out with ease, and even when heavy weight materials such as books are copied, the title device can sufficiently support the weight on the original platen 3 at the time of of over-hanging, thus, stabilizing the copying action.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a copying machine with a movable document table that scans a document by moving the document table.

[Prior art]

2. Description of the Related Art Some copying machines scan a document image by moving a document table disposed at the top of the machine. Fourth
The figure is a schematic front view of such a copying machine having a movable document table and a Taramsiel structure. The upper unit 31, which includes an optical system, a photosensitive drum, a developing device, etc. (not shown), is configured to be able to open and close upwardly with respect to the copying machine main body 32 about a pivot 38. 35, a transfer section (not shown), a fixing section 36, a paper discharge tray 37, and the like. In other words, the upper unit 31 forms the upper part of the conveyance area for the copy paper that is carried out from the paper feed section, passes through the copying process, and is discharged to the paper output tray 37, and when it is opened, it can be used to clear jams, etc. The structure is such that it can be easily carried out. A document table 33, which is disposed at the top of the copying machine, that is, above the top unit 31 in the closed state, and on which a document to be copied is placed, runs approximately parallel to the conveying direction of the copy paper on a slide rail (not shown). It is designed to overhang and move to the left side of the copying machine main body 32, and by this movement, the original image is scanned by the optical system.

When opening the upper unit 31, the document table 33 is moved further out of the machine than the overhang position during normal copying and is retracted (the state shown in FIG. 4). The reason for this is that in order to open the upper unit 31, a spring device such as a torsion bar with a force capable of withstanding its own weight and its reinforcement structure are required. This is to reduce the weight of the upper unit, eliminate the need for a strong spring device, etc., and reduce the weight and size of the entire device.

[Problem to be solved by the invention]

By the way, in the copying machine with a movable document table having the clamshell structure configured as described above, the upper unit is
It is advantageous for the open area to be wide so that jam removal and the like can be easily performed. For this reason, the upper unit is configured to have a large area by increasing the amount of overhang of the document table as much as possible.

However, when the amount of overhang increases, if some kind of load is applied to the protruding end of the document table, the slide rail for reciprocating the document table may be damaged or the document glass may be damaged. There is a problem of inviting and,
These problems apply not only to those with the Talam shell structure, but also to all types of document table movable type.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a copying machine that reliably prevents the occurrence of problems when the document table of a copying machine with a movable document table overhangs.

[Means to solve the problem]

A copying machine according to the present invention is a copying machine of a movable document table that is provided with a document table that protrudes and moves to the side of the machine body, in which a document that is disposed inside the machine body and that protrudes to the side of the machine body as the document table moves. It is characterized by comprising an arm that protrudes below the table and supports the document table.

[Effect]

When the document table is projected and moved to the side of the machine body, an arm is accordingly projected from inside the body below the document table that projects to the side of the machine body, and the document table is supported by the arm.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on drawings showing embodiments thereof. FIG. 1 is a schematic front view of a copying machine according to the present invention (hereinafter referred to as the present invention apparatus).The present invention apparatus has a clamshell structure similar to the conventional apparatus described above, and has an optical system, a photosensitive An upper unit 1 including a drum, a developing device, etc. is configured to be openable and closable from the copying machine main body 2 around a pivot 8. As shown in the partial external perspective view of FIG. 2, the left and rear parts of the copying machine main body 2 are formed on the left and rear parts of the upper unit 1, respectively, and a document table 6 is mounted on the upper surface of the rear part. A lower slide rail 9b for reciprocating movement is attached in the width direction of the copying machine main body 2. The document table 3 includes the lower slide rail 9b and a pair of upper slide rails 9a.
is located above the upper unit 1 in the standby state when no copying is being performed, and has an original glass 10 and an original presser 13 (third
(see figure). The document table 3 is moved to the left side of the copying machine body 2 by the upper and lower slide rails 9a and 9b, and at the same time, the document is scanned by the optical system in the upper unit 1.

On the left side of the copying machine main body 2, there is a document table 3 on the upper part.
A guide member 11 is installed to restrict the movement of the copying machine main body 2 in the front and back direction during movement of the copying machine, and arms 4 and 4 for supporting the document table 3 when the upper unit 1 is opened are mounted on the front side. It is equipped near the front and rear sides. Each arm 4 is supported by a bearing 18 so that its longitudinal direction is positioned parallel to the moving direction of the document table 3, as shown in the enlarged longitudinal cross-sectional view of FIG. Each part contains 15 bottles and 7 bottles.
6, and the pin 15 is fitted into a slit 21 formed on the upper surface of the copying machine main body 2 in parallel to the moving direction of the document table 3, and protrudes from the upper surface of the copying machine main body 2. The hook 16 includes a hook 1 provided on the side wall of the upper unit 1.
The arm 4 is normally urged by the spring 20 and housed in the left side of the main body 2 of the copying machine. Further, a rubber 17 that comes into contact with the lower surface of the document table 3 is provided at the end of the arm 4 opposite to the pin 15 and the like. Protrusions 14, 14 are provided at positions near the right end of the lower surface of the document table 3, and the pins 15 of each arm 4 are positioned in the movement range of each protrusion 14 as the document table 3 moves. It is.

The copying machine main body 2 is equipped with a paper feed section including a paper feed cassette 5, a transfer section (not shown), a fixing section 6, a paper ejection tray 7, etc. The document image An electrostatic latent image corresponding to the image is formed on the surface of the irradiation drum, and then a toner image is formed by a developing device. After that, the copy paper is discharged to the paper discharge tray 7.

Now, in the apparatus of the present invention configured as described above, when the document table 3 moved by the copying operation scans the largest document that can be copied, that is, even at the maximum overhang position during copying, the document table 3 The mounting position of the projection 14 is determined so that the projection 14.14 provided on the lower surface does not come into contact with the pin 15.15 of the arm 4.4, and the arms 4, 4 are housed inside the copying machine body 2. has been done.

Next, when opening the upper unit 1, the document table 3 is moved so as to protrude further to the left than the maximum overhang position during copying, and then the upper unit 1 is opened. In other words, in the conventional apparatus, if a load is applied to the document table 3, there is a risk of damage to the upper and lower slide rails, etc. In the apparatus of the present invention, as the document table 3 moves, the protrusion 14.14 comes into contact with the pin 15.15, and the arms 4, 4 are moved by the springs 20.15.
The original table 3 protrudes from the copying machine main body 2 to the left side thereof against the biasing force 20. As a result, the document table 3 is supported by the arms 4, 4 via the rubbers 17, 17, and there is no risk of damage to the slide rails or the like. Here, in order to prevent the document table 3 from being returned, the spring 20 is designed to have a force smaller than the force required to move the document table 3, and to prevent the arm 4 from moving when the document table 3 is returned to its original copying position. It is desirable to select one that has sufficient strength to be stored in the copying machine main body 2.

In this embodiment, the arm does not protrude during normal copying operation, but the present invention is not limited to this, and may be made to protrude during normal copying operation. The attachment of the protrusion can be freely set by changing the position. In particular, by applying this to copiers in which the optical original lamp is placed near the edge of the copying machine body (often in models that do not have a thalamusiel structure), even if the original platen greatly overhangs when scanning the original, it is possible to copy the original. Operation can be performed stably. Furthermore, in this embodiment, the arms are provided at two locations, but the installation position and number of arms are not limited either, as long as they are configured to reliably support the document table. .

〔effect〕

As described above, in the copying machine with a movable document table according to the present invention, the document table is overhanged to a large extent when it is retracted for opening due to the Talam shell structure, or when a document is scanned during a copying operation. As the document table moves, it is supported by an arm that protrudes downward from the document table that protrudes from the copying machine main body to the side, so even if some load is applied to the end of the document table that is in an overhanging state. There is no damage to the slide rails that move the document table, and there is no risk of damage to the document glass. Therefore, the present invention has excellent effects such as being able to handle jams with peace of mind, and even when copying heavy objects such as books, it can sufficiently cope with the load applied to the document table during overhang, and the copying operation is stable. play.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view of a copying machine according to the present invention, FIG. 2 is an external perspective view of the main parts thereof, FIG. 3 is an enlarged vertical sectional view of the main parts thereof, and FIG. 4 is a schematic front view of a conventional device. It is. ■...Upper unit 2...Copier main body 3...
Document table 4... Arms 9a, 9b... Slide rails 10... Document glass patent Applicant: Minolta Camera Co., Ltd. Representative Patent attorney: Noboru Kono No. 1, Fig. 2, Fig. 3, Fig. 4

Claims (1)

[Scope of Claims] 1. In a copying machine with a movable document table that is provided with a document table that protrudes and moves to the side of the machine, a document that is disposed inside the machine and that protrudes to the side of the machine as the document table moves. A copying machine comprising an arm that protrudes below the table and supports the document table.