JPH0268576A - Safety mechanism for copying device - Google Patents

Abstract

PURPOSE:To prevent a moving mechanism from breaking by fixing a moving copying unit to a fixed original platen in a switch-off state and releasing the moving copy unit from being fixed in a switch-off state associatively with a power switch. CONSTITUTION:The power switch 14 and a fixed member 15 which constitutes a fixing mechanism are arranged closely nearby the opening part of the fixed original platen 2. The fixed member 15 is constituted by projecting a fixed lever 15b and a hook 15c at both ends of a shaft 15a in the same direction and the whole fixed member 15 is fitted rotatably around the shaft 15a. When the hook 15c is positioned as shown in a figure D, the moving copy unit 3 is released from being fixed by the fixing mechanism and when the hook 15c is positioned as shown in a figure E by rotating by 90 deg. through the hole 2a of the fixed original platen 2 and the hole 3a of the moving copy unit 3, the hook 15c engages the part of the hole 3a of the moving copy unit 3 to fix the moving copy unit 3 by the fixing mechanism. Then the fixed member 15 and power switch 15 are associated operatively.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a safety mechanism for a copying apparatus including a movable copying unit that moves within a fixed document table.

(Prior Art) A copying apparatus using an electrophotographic process uses an exposure device to expose the surface of a document to form an electrostatic latent image corresponding to the document image on a photoreceptor, and a developing device to develop this electrostatic latent image. After being visualized as a developed image, this developed image is transferred onto a transfer paper by a transfer device, and the transferred developed image is fixed as a permanent image by a fixing device.

By the way, in such a copying apparatus, the above-mentioned exposure device, photoreceptor, developing device, transfer device, and fixing device are compactly unitized as a movable copying unit, and this unit is moved back and forth within a fixed document table. There is one that performs a copying operation. Note that the fixed document table has a document glass on which the original is placed, and when no copying operation is being performed, the movable copying unit is safely stored within the fixed document table, so that the installation space of the copying device is small. It has been taken into consideration that the Additionally, in order to prevent the movable copying unit from moving within the fixed document table or jumping out from the fixed document table when carrying the copying device, a device for fixing the movable copy unit to the fixed document table is required. Yes.

(Problem to be Solved by the Invention) However, in the above-mentioned conventional copying apparatus, when a copying operation is performed with the movable copying unit fixed to the fixed document table, the fixation of the movable copying unit There was a problem that the moving mechanism for moving the copying unit and copying unit could be damaged.

The present invention has been made in view of the above problems, and an object of the present invention is to prevent the fixed portion of the movable copying unit from performing a copying operation while the movable copying unit remains fixed. It is an object of the present invention to provide a safety mechanism for a copying apparatus that can reliably prevent damage to a moving mechanism for moving the movable copying unit.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a fixing mechanism for fixing a movable copying unit to a fixed document table in conjunction with a power switch, and fixes the movable copying unit when the power switch is turned off. The fixation is released when the power switch is turned on.

(Function) When performing a copying operation by turning the power switch ON/OFF, the mobile copying unit is fixed or released in conjunction with the ON operation of the power switch, so the mobile copying unit remains fixed. In this state, a copying operation can be performed, and damage to the moving mechanism for moving the fixed part and the movable copying unit can be reliably avoided.

Furthermore, since the movable copying unit is fixed by the fixing mechanism when the power switch is OFF, the movable copying unit does not move within the fixed original table or jump out of the fixed original table when carrying the copying apparatus.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a longitudinal sectional view of the copying device, FIG. 2 is a perspective view of the same, FIG. 3 is a longitudinal sectional view showing movement of a movable copying unit in the copying device, and FIG. 4 is a perspective view of a fixing member. , 5th
The figure shows the operation of the hook part of the fixing member, and Figure 6 (a)
)(b) and! FIGS. 87(a) and 87(b) are diagrams showing the interlocking operation of the fixed lever and the power switch.

First, the general structure of the copying apparatus 1 will be explained based on FIGS. 1 and 2. The copying apparatus 1 has an open side (the right side in FIG. 1 and the front side in FIG. 2). It is constructed by movably loading a movable copying unit 3 into a box-shaped fixed document table 2.

An original glass 4 on which the original is to be placed is attached to the upper surface of the fixed original table 2, and a rack 5 and a slide rail 6 are provided on the ceiling and inside surface of the fixed original table 2, respectively. The pinion 7 provided on the side of the movable copying unit 3 meshes with the rack 5 . Note that the pinion 7 is rotationally driven by a motor (not shown).

Further, the movable copying unit 3 has an exposure device 8, a short focus lens array 9, a photoreceptor lO1 developing device 11, a transfer device 12, and a fixing device 13 inside. The movable copying unit 3 is moved along the slide rail 6 within the fixed YX manuscript table 2 from position A to position B in FIG. During this time, the original placed on the original glass 4 is read, and a permanent copy image is formed on the transfer paper inserted from C in the figure, and then the transfer paper is ejected from D and returned to position A.

Incidentally, near the opening of the fixed document table 2, a power switch 14 and a fixing member 15 constituting a fixing mechanism are disposed in close proximity, and these constitute a safety mechanism according to the present invention.

As shown in FIG. 4, the fixing member 15 includes a fixing lever 15b and a hook 15c protruding from both ends of a shaft 15a in the same direction, and the entire fixing member 15 is rotatable about the shaft 15a. attached. And this fixing member 1
A spring 1 is connected between a pin 16 protruding from the side of the hook 15c of No. 5 and a pin 17 protruding from the side of the fixed document table 2.
8 is interposed, and this spring 18 allows the hook 15c (and the fixed lever 15b) to move to the D or E position shown in the figure, with the line F connecting the pin 17 and the center of the shaft 15a as the border, as shown in FIG. The configuration is such that only one of them can be used. That is, when the hook 15c is in the illustrated position D, the fixation of the movable copying unit 3 by the fixing mechanism is released, and the hook 15c passes through the hole 2a of the fixed document table 2 and the hole 3a of the movable copying unit 3. When the hook 15c is rotated 90'' and is at the E position shown in the figure, the hook 15c is engaged with the hole 38 of the movable copying unit 3, and the movable copying unit 3 is fixed by the fixing mechanism.

By the way, the fixing member 15 and the power switch 14 that constitute the fixing mechanism are interlocked with each other, but the interlocking relationship between them is described in the sixth section.
This will be explained based on the diagram and FIG. 7. Furthermore, Figures 6 and 7
In the figures, (a) is a front view, and (b) is a side view.

Figure 6 shows a state in which the fixing mechanism is not activated.
At this time, the fixed lever 15b stands vertically, the power switch 14 is in the ON state, and the copying operation is possible. That is, when the power switch 14 is in the ON state and a copying operation is possible, the movable copying unit 3 is fixed or released and can be moved freely, so that no problem occurs in the copying operation.

From the above state, the fixing lever 1 is moved as shown in FIG.
5b, the power switch 14 can be moved to the fixed lever 15b.
Since the movable copying unit 3 is fixed and becomes OFF as shown in the figure, copying operations are no longer possible. Therefore, when carrying the copying device, etc.,
Since the movable copying unit 3 is fixed, the movable copying unit 3 does not move within the second fixed document or jump out of the fixed document table 2.

Further, when the power switch 14 is turned on from the state shown in FIG. 7, the fixing lever 15b that engages with the power switch 14 returns to the position shown in FIG. 6, and the movable copying unit 3 is fixed or released. Therefore, copying operations can be performed without any problems.

As described above, in this embodiment, since the copying operation is not performed while the movable copying unit 3 remains fixed, the fixed portion of the movable copying unit 3 and the rack 5. The occurrence of a problem in which the drive mechanism constituted by the pinion 7 etc. is damaged can be reliably prevented.

Next, a modified embodiment of the present invention will be described based on FIGS. 8 to 11. 8 is a perspective view of a copying machine according to a modified embodiment, FIG. 9 is a perspective view showing the relationship between the arm part of the power switch and the contact spring, and FIGS. 10 and 11 are explanations of the operation of the power switch. It is a diagram.

In this embodiment, a power switch 20 is attached to a part of the movable copying unit 3 as shown in FIG. 8, and the power switch 20 has an arm portion 20a and a contact 20b as shown in FIG. have.

When the power is turned on as shown in FIG. 10, the contacts 20b of the power switch 20 are in contact with the contact springs 21a and 21b, allowing copying operation, and the arm portion 20a of the power switch 20 is completely closed. Since it is retracted into the movable copying unit 3, the movable copying unit 3 can freely move within the fixed document table 2.

From the above state, move the power switch 20 to the right as shown in FIG. 11 to turn on the power! When the power switch 20 is turned off, the contact 20b of the power switch 20 and the contact springs 21a, 21b are separated and conduction between the two contacts 21a, 21b is broken, making copying impossible. As shown in the figure, the movable copying unit 3 is fixed and cannot be moved because it enters the hole 2a of the fixed document table 2.

Thus, in this embodiment, the same effect as that obtained in the above embodiment can be obtained, but especially in this embodiment, the power switch and the fixing lever in the above embodiment are constructed as the same component. , the number of parts is reduced and the structure is simplified. Note that the power switch 20 may be provided on the fixed document table 2 side.

(Effects of the Invention) As is clear from the above description, according to the present invention, when a copying operation is performed by turning the power switch ON, the fixation of the movable copying unit is released in conjunction with the ON operation of the power switch. Therefore, it is possible to perform a copying operation while the movable copying unit remains fixed, and it is possible to reliably prevent damage to the fixed portion and the moving mechanism for moving the movable copying unit.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the copying device, FIG. 2 is a perspective view of the same, FIG. 3 is a longitudinal sectional view showing movement of a movable copying unit in the copying device, and FIG. 4 is a perspective view of a fixing member. , 5th
The figure shows the operation of the hook part of the fixing member, and Figure 6 (a)
)(b) and FIGS. 7(a) and (b) are diagrams showing the interlocking operation of the fixed lever and the power switch, FIG. 8 is a perspective view of the copying machine according to the modified embodiment, and FIG. Perspective views showing the relationship between the arm part and the contact spring, Figures 1O and 11
The figure is an explanatory diagram of the operation of the power switch. l... Copying device, 2... Fixed document table, 3... Movable copying unit, 4... Original glass, 14.20...
Power switch, 15...Fixing member, 15b...Fixing lever 15c...Hook.

Claims (1)

[Claims] A mechanism attached to a copying apparatus configured by movably loading a movable copying unit having electrophotographic processing equipment except for a document glass into a fixed document table having a document glass, the mechanism being linked to a power switch, Turn off the power switch
when the movable copying unit is fixed to the fixed document table;
A safety mechanism for a copying machine consisting of a fixing mechanism that releases the fixation of a movable copying unit when the power switch is turned on.