JPS63127255A - Unit type copying machine - Google Patents

Abstract

PURPOSE:To safely perform adjusting work and maintenance by freely opening and closing an optical system unit, in which an optical system device and a driving means are stores, to a copying machine body and supplying power to the driving means from the machine body through a connector provided in the unit and detecting the non-connection state of the connector to stop the power supply. CONSTITUTION:An optical system unit 2 is freely opened and closed to a copying machine body 21 through a shaft 2a. When the unit 2 is opened, a plug 1a of a connector 1 and a jack 1b provided in the machine body 21 are disconnected. In such a non-connection state, a voltage +V from a controller 13 is not earthed, and the potential on the base side of a transistor (detector) TR goes to +V, and the voltage +V is applied to a relay Ry 1 to turn off it, and the power of an AC power source is not supplied to a driving part 14 such as a motor.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a copying machine using electrophotography, and in particular to a unit in which an optical system for scanning an original image is made into a unit and can be freely opened and closed in the main body of the copying machine. Regarding copying machines.

(BL Background Art) Generally, in a copying machine using electrophotography, an optical system device scans an image of a document, and the light from a light source is reflected on the document image and distributed to a copying process section.

In the copying process section, an electrostatic latent image is formed on the surface of the photoreceptor by the distribution of reflected light, a developer is supplied to this latent image, a developer image is created, and the image is transferred onto a sheet of paper.

The paper is conveyed through a paper conveyance path configured from a paper feed section, through a copying process section, and to a paper discharge section. As described above, a large number of devices are provided inside the copying machine, and in order to facilitate assembly of these devices, the copying machine is often divided into two parts based on the paper transport path.

By configuring the copying machine into two parts, it becomes easier to assemble the parts, and since the paper transport path can be divided vertically, paper jams can be easily removed. Become. If the paper transport path is divided into two parts, the lower unit will be provided with the paper transport path, and the upper unit will be equipped with the copy process section and optical system device. It is composed of parts, and assembly of the upper unit is still not easy. In particular, the work of assembling parts related to the optical system device to the upper unit involves the work of wrapping wires that serve as driving force transmission means for light sources, etc., and there is not enough space to route the wires, making the assembly work complicated. .

For this reason, the present applicant has separately proposed a unit type copying machine in which the copying machine is divided into three parts, the lower unit is provided with a paper conveyance path, the central unit is provided with a copying process section, and the upper unit is provided with an optical system. If the unit-type copying machine is configured as described above, the optical system device, the copying process section, and the paper conveyance path can each be assembled into their own units, so productivity can be improved. Particularly, when assembling an optical system device, sufficient space can be secured for routing wires, making the work easier. Furthermore, by configuring each unit to be openable and closable, maintenance such as paper jam removal can be simplified.

(C) Problems to be Solved by the Invention However, in the unit-type copying machine configured into three parts as described above, when the upper unit, which is the optical system unit, is opened, the devices constituting the copying process section are exposed to the outside. do. The devices that make up this copying process section include a rotatable photosensitive drum, a charger to which high voltage is applied, and when the optical system unit is opened, these devices can be contacted by the operator. It becomes a state. Furthermore, during post-assembly adjustments and maintenance, workers or operators often touch these devices with their hands. For this reason, if power remains supplied to the devices that make up these copying process units during adjustment or maintenance, the hook device may be driven due to incorrect operation or malfunction, causing injury to the worker or operator, or damage to the equipment. is broken and safety cannot be ensured.

An object of the present invention is to cut off the power supply to at least the externally exposed devices of the process section of a copying machine when the optical system unit is opened, thereby ensuring the safety of adjustment work and maintenance. Means for Solving the Problem (d) in Providing a Model Copying Machine The unit-type copying machine of the present invention is capable of being opened and closed at one end with respect to the copying machine body, and has an optical system device driven therein. an optical system unit housed together with the means; a connection detection means for detecting a connection state between a connector that connects the drive means to a power supply circuit and the connector, which is provided outside the vicinity of the shaft side end of the optical system unit; and a connection detection means. The present invention is characterized in that the apparatus further comprises a power cutoff means for cutting off power supply to the copying machine main body when a state in which the connector is not connected is detected.

+8) Effect In the present invention, the optical system device and the driving means are housed in an optical system unit, and this optical system unit can be opened and closed with respect to the main body of the copying machine. Electric power is supplied to the driving means of the optical system device from the copying machine main body side through a connector. Since this connector is provided outside the vicinity of the shaft side end of the optical system unit, the connector is no longer connected when the optical system unit is opened. When this disconnection state is detected by the connection detection means, the power supply to the main body of the copying machine is cut off by the power cutoff means.

(f) Embodiment FIG. 2 is a schematic front sectional view showing the configuration of a unit type copying machine which is an embodiment of the present invention.

A photosensitive drum 22 is rotatably provided in the center of the copying machine main body 21, and a developing device 2 is provided on the outer periphery of the photosensitive drum 22.
3. Together with the transfer charger 24, cleaner 25, charging charger 26, etc., a copying process section 27 is constituted. A paper cassette 28 is provided on one side of the copying machine main body 21.
．． 29 and a manual feed tray 30 are attached, and together with paper feed rollers 31 and 32, a paper feed section 33 is constituted.

A paper ejection tray 34 is attached to the other side of the copying machine main body 21, and a paper ejection section 36 is also configured together with a paper ejection roller 35.

A timing roller 37, a fixing roller 38, etc. are provided between the paper feed section 33, the copy process section 27, and the paper discharge section 36, thereby forming a paper conveyance path 39. The copying machine main body 21 is divided into a lower unit 3 and a central unit 4 at the position of the paper transport path 39. The central unit 4 is equipped with a main motor 40 and a copying process section 27.
can be opened and closed with respect to the lower unit 3 using the shaft portion 4 as a fulcrum.

An optical system unit 2 is provided on the upper surface of the copying machine main body 21 so as to be openable and closable about a shaft 2a.

Inside this optical system unit 2, a light source 7, mirrors 8a to
8f and a lens 9 are provided. Further, a document table 11 is configured on the upper surface of the optical system unit 2 . During the copying process, the light source 7 and mirrors 8a to 8C are placed on the document table 1.
1 to scan the image of the document placed on the document table.

At this time, the light from the light source 7 is irradiated onto the original image, and the reflected light is distributed onto the surface of the photosensitive drum 22 via the mirrors 8a to 8f and the lens 9, as shown by the dashed line in the figure.

FIG. 1 is a schematic external perspective view of the unit type copying machine.

The optical system unit 2 can be opened and closed with respect to the copying machine main body 21 about a shaft 2a. When the optical system unit 2 is opened, a photosensitive drum 22 provided inside the copying machine main body 21,
The developing device 23, charger 26, etc. are exposed to the outside. At one corner of the open end 2b of the optical unit 2, a plug 1a of the connector 1 is provided at the end of the conductive line 6. The conductive line 6 is connected to an optical system drive motor and a lens movement motor (not shown). A cover 5 is provided at one corner of the optical system unit 2, and by removing the cover 5, the plug 1a of the connector 1 is exposed. Compared to the amount of movement of the open end 2b of the optical system unit 2, the conductive line 6
The length of is made sufficiently short. A jack 1b of the connector 1 is embedded in the upper surface of the copying machine main body 21 at a position facing the plug 1a of the connector 1. When the optical system unit 2 is closed on the top surface of the copying machine main body 21, the connector 1
The plug 1a can be connected to the jack 1b.

FIG. 3 is a circuit diagram of the unit type copying machine.

Two conductive lines of the plug 12 connected to the AC power source are connected to the controller 13 of the copying machine main body 21 and the 2nd and 4th pins of the jack 1b. Further, it is connected to a drive unit 14 such as a motor via a switch SW1. On the other hand, in the optical system unit 2, pins 2 and 4 of the plug 1a of the connector 1 are connected to the motor driver 17. This motor driver 17 supplies power to the optical system drive motor M1 and the lens movement motor M2.

Now, if the plug 1a and jack 1b of the connector 1 are not connected, the voltage +■ from the controller 13 is not grounded, and the potential on the base side of the transistor TRI is +■
, and voltage +V is applied to relay Ry1. At this time, the switch SWI is turned off, and AC power is not supplied to the drive unit 14 such as a motor.

On the other hand, when the plug 1a and the jack 1b are connected, the voltage +V from the controller 13 is grounded, and the potential on the base side of the transistor TRI becomes the ground potential. Therefore, voltage element ■ is not applied to relay Ry1, and switch S
WI turns on. At this time, power is supplied to the drive unit 14 such as a motor. In the above, the relay Ryl and the switch SWl indicated by the dashed line in FIG. It is.

As described above, according to this embodiment, the connected state of the connector 1 is detected by the transistor TRI, and depending on the connected state of the connector, a voltage is selectively applied to the relay Ryl, and the switch SW1 is turned on/off. This switch SW
I is provided between the power supply line and the drive section 14 such as a motor, and the power supply to the main motor, charger, etc. of the copying machine main body 21 can be selectively enabled by turning on/off the switch SWI.

(g) Effects of the Invention According to the present invention, the connection detection means detects the connection state of the drive means provided in the optical system unit and the connector for connecting the power source, and the power shielding means detects the connection state of the connector. It is possible to selectively cut off the power supply to the copying machine main body. Since the connector is provided outside the vicinity of the shaft-side end of the optical system unit, the connector is no longer connected when the optical system unit is opened. Therefore, when the optical system unit is opened, the power supply to the main body of the copying machine is cut off, and adjustment work and maintenance can be performed safely.

[Brief explanation of the drawing]

Fig. 1 is a schematic external perspective view of a unit-type copying machine according to an embodiment of the present invention, Fig. 2 is a schematic front sectional view showing the configuration of the unit-type copying machine, and Fig. 3 is a schematic front sectional view of the unit-type copying machine. It is a circuit diagram. 1-connector, 2-optical system unit, Ml-optical system drive motor, M2-lens movement motor, TRl-transistor, Ryl-relay, 5W1-switch.

Claims (1)

[Claims] (1) An optical system unit that can be opened and closed about one end of the copying machine body as an axis and that houses an optical system device together with a driving means therein; and the driving means that is provided outside the vicinity of the shaft side end of the optical system unit. connection detection means for detecting a connection state between a connector that connects the connector to a power supply circuit and the connector; and a power cutoff unit that cuts off power supply to the copying machine main body when the connection detection means detects that the connector is not connected. A unit type copying machine comprising means and.