JPH03186832A - Copying machine - Google Patents

Abstract

PURPOSE:To eliminate the deviation of an original and the waste of electric power with the aid of simple constitution by using one detection means both for detecting a position where the deceleration of an original platen, which is being moved, is started and for detecting a position where the exposure of the original is started. CONSTITUTION:One detection means which is used both for detecting the position where the deceleration of the original platen which is being moved is started and for detecting the position where the exposure is started and a control means which decelerates and stops the original platen based on a signal from the detection means are provided. For example, projecting parts 1a and 1b are provided to the original platen 1 and a switch 50 is arranged below the original platen 1. Then, while the original platen 1 is moved to the direction of a light source for exposure (a and b), the deceleration of the original platen 1 is started and it is stopped by the control means when the detection signal of the deceleration start position of the original platen 1 is transmitted by the detection means 1a and the switch 50. Thereafter, when the original platen 1 is started to be moved in a reverse direction and moved in a constant speed, the detection signal of the exposure start position of the original is transmitted by the means 1a and the switch 50 and the exposure is started. Thus, a copying machine that the original is prevented from deviating and the electric power is prevented from being wasted is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a copying machine that exposes a document to light by moving a document table on which the document is placed.

[Prior Art] Conventionally, in a copying machine in which a document is exposed by moving a document table on which the document is placed, the document table is active when it stops, although there is some through-down, etc. There was nothing to decelerate the train, and the train came to a sudden stop by hitting a stopper. Further, exposure also started at the same time as the document table began to move.

[Problems to be Solved by the Invention] However, there is a problem in that if the document table suddenly stops, the document placed thereon will shift. or,
If the exposure is started at the same time as the document table starts moving, the exposure will be started before the document is at the position where it should be exposed, resulting in a problem of wasted power.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a copying machine that does not shift originals and does not waste power.

[Means for Solving the Problems] In order to achieve this object, the copying machine of the present invention using the document table moving method detects the position at which to start decelerating the document table during movement and the position at which exposure to the document starts. The apparatus includes one detection means that also serves as a detection means, and a control means that controls the moving speed of the document table to be slowed down and stopped based on a signal from the detection means.

[Function] According to the present invention having the above configuration, when the document table on which the document is placed is moving in the direction of the exposure light source, the detection means detects the detection signal of the deceleration start position of the document table. When the signal is transmitted, the control means starts decelerating the document table and stops the document table. After that, the document table starts moving in the opposite direction and becomes constant speed. Then, the detection means transmits a detection signal of the exposure start position of the document, and exposure is started.

[Embodiment 2] A full-color copying machine 40 embodying the present invention will be described below.

FIG. 1 is a sectional view of a full-color copying machine according to the present invention.

FIG. 2 is a schematic diagram of the document table cover 1 and switch 50 of the present invention. Please note that photosensitive paper (
(consisting of microcapsule paper and color developing paper) was published in Japanese Patent Application Laid-open No. 1983
This method has been proposed in, for example, Japanese Patent No. 88739, and will not be described in detail here.

The full-color copying machine 40 includes a document table glass 2 and a document table cover 1, the top plate of which is movable in the left and right directions, as shown in the figure.
A desired document can be placed face down on the document table glass 2. The document table cover 1
has two protrusions 1 spaced apart in the direction of movement.
a and lb are provided, and each protrusion 1a is provided below the document table cover 1.

A switch 50 that is operated by the switch 1b is disposed, so that the switch 50 is opened and closed by moving the document table. A light source consisting of a halogen lamp 3 extending in a direction perpendicular to the direction of movement of the original platen glass 2 and a semi-cylindrical reflecting mirror 4 arranged to surround it is fixed to the upper right side of the full-color copying machine 40. , irradiates a line of light toward the document table glass 2.

Therefore, the light emitted from the halogen lamp 3 can sequentially illuminate the entire surface of the document table glass 2 from the left end to the right end by moving the document table glass 2 in the left-right direction. The light emitted from the light source passes through the transparent platen glass 2 and is reflected by the original placed on it. A document table cover 1 is provided to cover the document table.

In addition, in order to use the light emitted from the halogen lamp 3 to irradiate the original with high efficiency, a reflector 5 is placed on the left side of the light source to reflect the light that is not directed directly toward the original and use it again to irradiate the original. .

A fan 6 and a louver 7 are provided to the right of the halogen lamp 3 to draw air from the outside. As a result, air can be efficiently applied to the document table glass 2. Light emitted from the halogen lamp 3 and reflected from the document placed on the document table glass 2 passes through the filter 8 and enters the lens 9 .

The filter 8 is for changing the light transmission characteristics according to the sensitivity characteristics of the microcapsule paper 37 and adjusting the color tone of the copied image, and is composed of three types of filters for the three primary colors of light. The lens 9 is attached to a lens mounting plate 10, and allows minute angle adjustment with respect to the optical path.

The light focused by the lens 9 is turned 180° by two reflecting mirrors 11, and is imaged on the microcapsule paper 37 closely positioned below the exposure table 9. The two reflecting mirrors 11 are fixed to a mirror mounting plate 12, and the optical path length and focus are adjusted by finely adjusting the mounting position of the mirror mounting plate 12.

On the other hand, a long microcapsule paper 37 is wound around a cartridge shaft 14 and housed in a removable cartridge 13 disposed below the platen glass 2. One end of the paper is connected to a large number of rollers and It reaches the winding shaft 25 via the developing device 20.

That is, the microcapsule paper 37 that has come out from the lower part of the cartridge 13 is guided by the feed roller 5 and the tie roller 17, passes below the exposure table 19, and then passes through the pressure developing device 2.
0. Thereafter, the microcapsule paper 37 that has passed through the pressure developing device 20 is guided to a peeling roller 23 and a meandering adjustment roller 24, and then wound onto a winding shaft 25''.

The unexposed microcapsule paper 37 after leaving the cartridge 13 is maintained in an unexposed state by the light shielding cover 16.

The transport speed of the microcapsule paper 37 is controlled to be constant by the capsule paper feed roller 22, and is made to match the moving speed of the document table glass 2, so that the transport speed of the microcapsule paper 37 when passing through one exposure table is In this case, latent images of predetermined lines of the original are sequentially formed.

Further, a developer paper cassette 32 containing cut paper type developer paper 38 is provided below the pressure developing device 20, and the developer paper 38 is taken out one by one by a half-moon roller 33, and the developer paper cassette 32 is taken out one by one by a half moon roller 33, After the leading end is aligned by the registration gate 35, the paper is transported to the paper entrance of the pressure developing device 20.

Therefore, the pressure developing device 20 includes the microcapsule paper 37.
The color developer paper 38 and the color developer paper 38 are supplied in a state where they are in close contact with each other and are integrated. The pressure developing device 20 is composed of a small diameter roller 21 and a backup roller 31. Microcapsule paper 37
The microcapsule surface on which the latent image is formed and the developer-coated surface of the color developer paper 38 are in contact with each other on the inside and are sandwiched between the small diameter roller 21 and the backup roller 31 and pressure is applied. This pressure destroys the unexposed microcapsules and forms an image on the developer paper 38.

The microcapsule paper 37 and the color developer paper 38 that have come out of the pressure developing device are carried out by the capsule paper feed roller 22, and the microcapsule paper is moved upward by the peeling roller 23, and the color developer paper 3
8 are orthogonally separated.

After the color development of the color developing paper 38 is promoted by the heat fixing device and an image is formed, the developing paper 38 is conveyed to the paper discharge tray 27 with the image side facing up. The heat fixing device is composed of a hollow heat roller 29 having a heater 30 inside and a color developing paper feed roller 28.

The separated microcapsule paper passes through a meandering adjustment roller 24 and is wound around a winding shaft 25.

Next, referring to FIGS. 3 and 4, the copying machine 40 of this embodiment will be described.
The exposure operation will be explained below.

3(a) to 3(g) are diagrams sequentially explaining the operation of the document table cover 1, and FIG. 4 shows the states of FIGS. This is a graph showing the relationship between

After opening the document table cover 1 and placing the document, the document table cover 1 is closed and a start button (not shown) is pressed. Then, as shown in FIG. 3(a), the document table cover 1 begins to move in the direction of the arrow. Next, as shown in FIG. 3(b), when the protrusion 1a of the original platen cover 1 presses the switch 50, the original platen cover 1 starts to decelerate, and finally, as shown in FIG. 3(c), the original platen cover 1 1 stops. At this time, as for the deceleration method, any method may be used, such as controlling a driving means for moving the document table cover 1 or pressing a brake on the document table cover 1. Further, since the document table cover 1 gradually decelerates, the document does not shift.

Next, the document table cover 1, which had been stopped, starts moving in the direction of the arrow as shown in FIG. 3(d), and after reaching a constant speed, the protrusion 1
When the user a depresses the switch 50 again, exposure of the original is started. After exposing the original as shown in FIG. 3(e), another protrusion 1b presses the switch 50 three times as shown in FIG. 3(f). Then, when the exposure of the original is completed, the original platen cover 1 starts decelerating.

Then, as shown in FIG. 3(g), the document table cover 1 stops. Regarding the deceleration method at this time, see Figure 3 (b) (
The method of deceleration in c) may be used. At this time, the document does not move because the document table cover 1 does not suddenly stop. Finally, from the state shown in Figure 3(g),
The document table cover 1 returns to the position shown in FIG.
will be reset. Then, prepare for the next copy.

The present invention is not limited to the embodiments detailed above, and various changes can be made without departing from the spirit thereof.

For example, a protrusion may be provided on the document table.

Further, the detection means is not one that presses, but a sensor that reads or senses or the like may be used.

0 Furthermore, the detection means may be located at any position that allows detection.

[Effects of the Invention] As is clear from the detailed description above, according to the present invention, one detection means detects the position at which deceleration of the moving document table starts and the position at which exposure to the document starts. Because it has a simple configuration, the document does not shift,
Moreover, it is possible to provide a copying machine that does not waste power, which is a significant industrial effect.

[Brief explanation of drawings]

1 to 4 show embodiments embodying the present invention; FIG. 1 is a cross-sectional view of a copying machine, FIG. 2 is a schematic diagram of a document table cover and switch, and FIG. ) to (g) are diagrams sequentially explaining the operation of the document table cover, and FIG. 4 is a graph showing the relationship between the speed of the document table cover and time. In the figure, 1 is a document table cover, la and lb are protrusions, 40 is a copying machine, and 50 is a switch. 1 743

Claims (1)

[Scope of Claims] 1. In a copying machine in which a document table on which a document is placed moves to expose the document to light, detection of a position at which deceleration of the document table during movement starts and exposure of the document and a control means for controlling the moving speed of the document table to be slowed down and stopped based on a signal from the detection means. Characteristic copying machine.