JPH0612466B2 - Electrophotographic device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrophotographic apparatus such as a copying machine in which a main body of the apparatus can be divided and opened in two.

Conventionally, there are many copying machines configured to be capable of being divided and opened into two parts, an upper main body and a lower main body, along a transfer paper conveyance path in order to facilitate jam processing of transfer paper or cleaning of a photoconductor. In any of the copying machines, various electric components are arranged in the upper body and the lower body, and the electric wire or the electric wire bundle for electrically connecting the electric parts arranged between the both main bodies is Even when the upper main body is split and opened, it is arranged with a margin so as not to be broken.

However, if the electric wires are arranged with such an extra length, the electric wires are routed in search of an extra space that does not interfere with the copying process, which not only makes the manufacturing and repair work troublesome, but also causes a broken line accident of the electric wires. It is easy to connect to.

In addition, if the electric wire is routed inside the main body as described above, the rate of touching the electric wire will increase when the operator splits and opens the upper main body due to the jam treatment of the transfer paper, etc. There is also a problem from sex.

Further, in order to suitably connect various electrical components arranged in the upper body and the lower body respectively, it is necessary to dispose the electric wire so as to straddle the vicinity of a fulcrum connecting the both bodies. Generally, if the wires are arranged in this way, they will be bent or stretched each time the upper body is opened and closed, and the wires will be broken due to long-term use, or the insulating parts will wear out and the conductive parts will be exposed. There was a risk of electrical leakage.

The present invention aims to overcome the drawbacks of the prior art.

The present invention uses a printed circuit board on which an IC and other control components (not shown) are mounted, and detours a wire or a wire bundle that electrically connects the printed circuit board and various electrical components in a substantially straight line or slightly. Even so, it is an object of the present invention to provide an electrophotographic apparatus which can be arranged at almost the shortest distance.

As a result, the wires will not be routed in a complicated manner, not only will the manufacturing and repair work be facilitated, but the broken line accidents of the wires or wire bundles will be greatly reduced, and furthermore, the wires or wire bundles will be operated. Since it can be installed in a space where there is no risk of human contact, safety is also improved.

In addition, the present invention electrically connects to the printed circuit board through the electric wire and the electric wire bundle without intersecting the various electric component parts arranged in the upper body and the various electric component parts arranged in the lower body. It is daily to provide an electrophotographic device that can be connected to.

As a result, the parts of the various electrical components can be easily replaced. Further, even if the upper body is repeatedly opened and closed, it is possible to completely prevent the electric wire and the like from being broken, or the insulating portion from being worn away to expose the conductive portion to cause electric leakage.

Other objects of the present invention will become apparent from the embodiments of the present invention described with reference to the following drawings.

1 to 3 show a copying machine according to an embodiment of the present invention.

FIG. 1 is an overall external view showing the structure of the copying machine. FIG. 1A shows the upper main body in a closed state, and FIG. 1B shows the open state.

Reference numeral 1 denotes a copying machine main body, which is an upper main body 2 which is configured to be capable of being divided and opened substantially along a transfer paper conveyance path and centered on a pivot shaft (not shown) provided on a side wall surface of the main body parallel to the conveyance direction of the conveyance path. The lower main body 3 and the lower main body 3 make it possible to reduce the transport path length without limiting the transport path width and effectively reduce the maximum width of the copy paper that can be copied by the effective arrangement of the internal device described later. I am trying. As a result, the outer shape of the copying machine main body 1 becomes almost square, and even if the upper main body 2 can be divided and opened in a direction perpendicular to the transfer paper conveyance direction A indicated by an arrow, the weight load at the time of opening can be reduced. I can.

The lower body 3 has a cassette mounting opening 3a and a tray mounting opening 3b formed on the inlet side wall surface and the outlet side wall surface, respectively, and the front side wall surface parallel to the transfer direction A is substantially full width. The operation portion 4 is formed by arranging various operation buttons 4a necessary for copying work and a display body 4b showing a copy state on the upper surface of the extension portion 3c. In addition, the upper surface of the extending portion 3c is inclined toward the front side to facilitate the operation of the operation portion, and forms a sufficient operation space such that the front side wall surface does not interfere with the operation by the operator. is doing.

As described above, in this embodiment, since the operation portion 4 is formed on the side of the lower main body 3 fixed to the installation surface, not on the upper main body 2 which is rotated, the most operation is possible without being restricted by weight and shape. The operation unit 4 having a suitable shape can be formed, and the arrangement of the keyboard unit 61 described later and the arrangement of the electric wire bundle 61b connecting the keyboard unit 61 and the printed circuit board 60 are effective without hindering the transfer paper conveyance. Can be done.

Upper main body The upper main body 2 is rotatably connected to the lower main body 3 by a hinge 43 attached to a side wall surface (opposite side in the figure) opposite to the operation section 4 parallel to the transfer paper transport direction A, It is configured to be rotatable at a right angle to A and to an arbitrary rotation angle, for example, a vertical position.

On the upper surface of the copying machine main body 1, a document placing table 5 configured to be reciprocally movable along the transfer paper conveyance direction A over almost the entire surface.
Are arranged.

The document placing table 5 is composed of a document placing plate 51 formed of a transparent plate such as glass, and a document holding plate 52 for pressing and supporting the document placed on the placing plate 51 at a predetermined position. .

The document pressing plate 52 is configured by integrally bonding a document contact member 52a that presses the document against the upper surface of the placing plate 51 and a pressing member 52b that presses the contact member 52a from the back. The contact member 52a is formed of a thin plate-shaped soft material such as sponge or soft resin, and the pressing member 52b is formed of a rigid resin mold body in which a metal body or the like is enclosed.

The rigid document holding plate 52 has a fixed portion 52c formed at the rear end thereof, and the fixed portion 52c is attached to the side of the document placing table 5 on the side of the side wall opposite to the operation portion 4 to rotate the upper body 2 in the rotating direction. It can be opened in the same direction as.

As described above, in this embodiment, the upper main body 2 can be opened from the operation portion 4 side, that is, can be rotated in the direction perpendicular to the transfer paper conveyance direction A, so that a plurality of printed circuit boards are not provided as described later. , A single printed circuit board with the two main bodies 2,
By arranging in the vicinity of the hinge 43 for connecting the three, not only the above-mentioned object of the present invention can be achieved smoothly, but especially, the number of parts can be reduced, manufacturing can be facilitated, and parts can be replaced more easily. , Further increase the practical value.

FIG. 2 is an overall cross-sectional view showing the internal structure of the copying machine. As shown in FIG. 2, the upper main body 2 and the lower main body 3 are separated from each other along a transfer path of a transfer sheet from a dividing line SP indicated by a chain line. Constitute.

A drum-shaped photoconductor 21 having a photoconductive layer on the surface thereof is rotatably supported by the upper main body 2, and a charging device 22 and an exposure device 23 are provided around the photoconductor 21. A transfer device in which peripheral devices such as a developing device 24, a residual toner collecting device 25, and a static eliminator 26 are provided, and are provided in the lower main body 3 described later.
Together with 31, the well-known copying work is performed. The operation of these various devices will be obvious to those skilled in the art, and detailed description thereof will be omitted.

In order to reduce the weight when rotating the upper body 2, the photoconductor 21
It is preferable to have a small diameter, for example, about 30 mm.

Further, the upper main body 2 is provided with a drive device 28 for driving the above-mentioned or various devices described below on one side inner coupling part, and a cooling device 29 on the other side inner coupling part, and the cooling device 29 outlet. An opening window 27 is formed on the side wall surface of the upper main body 2 on the side so that heat inside the copying machine is released to the outside. In addition, since the driving device 28 has a heavy weight load when the upper body 2 rotates,
43 It is placed close to the inner wall surface on the mounting side to reduce the load when the upper body 2 turns.

On the other hand, in the lower main body 3, a transfer device 31 is arranged at the peripheral surface position of the photoconductor 21, and a registration roller 32 and a paper feeding device 33 are arranged between the cassette mounting opening 3a and the transfer device 31. The transfer paper in the cassette 41 is sent to the proper transfer device 31 in synchronism with the toner image position formed on the surface of the photoconductor 21. The cassette mounting port 3a
The cassette 41 can be inserted into the vicinity of the sheet feeding device 33 so that the transport path, that is, the entire length of the copying machine main body 1 can be shortened, the size can be reduced, and the upper main body 2 can be easily rotated.

A transfer device 34 is provided between the transfer device 31 and the tray mounting opening 3b.
After the guide plate 35, the fixing device 36, the discharge roller 37, and the like are provided, the transfer paper separated from the photoconductor 21 is fed into the fixing device 36 via the conveying device 34, and after fixing the final image. It is configured to be conveyed onto the tray 42 via the discharge roller 37 separated by the separating member 38.

A residual toner collecting container (not shown) is provided below the carrying device 34 in the vicinity of the side wall surface of the operation unit 4, and the residual toner removed from the surface of the photoconductor 21 by the collecting device 25. Are configured to be stored in the container.

Since the internal devices are efficiently arranged in the upper main body and the lower main body in this manner, the electric components described later can be arranged so as not to hinder the copying work, and the effects of the present invention can be achieved more smoothly.

FIG. 3 shows the arrangement state of various electric components arranged in the main body of the copying machine, FIG. 3A is a schematic side view showing the arrangement state of the printed circuit board, and FIG. 3B is the main electric component arranged in the lower body. FIG. 3C is a schematic plan view showing an arrangement state, and FIG. 3C is a schematic plan view showing an arrangement state of main electrical components arranged on the upper main body.

In FIG. 3A, reference numeral 60 denotes a printed circuit board on which a microcomputer and other control parts (not shown) are mounted and a circuit mechanism for effectively instructing the copying work is printed, which is close to the side wall surface 3d of the lower body 3 on the hinge 43 side. The transfer paper conveyance direction A
Are arranged in parallel with.

Explaining the printed circuit board 60 in more detail, the printed circuit board 60 can cover almost the entire width of the side wall surface 3d of the lower body 3, specifically, the maximum width between the mounting positions of the output terminals of the electrical components described later. Has a full width of, and is arranged so as to extend from the bottom of the lower body 3 to the upper body 2d.

Although the printed circuit board 60 is formed of a single substrate in this embodiment, it has a full width that can substantially cover the maximum width between the mounting positions of the output terminals of the electrical components, which will be described later. It is not always necessary to form a single substrate as long as it is arranged close to the main body side wall surfaces 2d and 3d that are parallel to the paper transport direction. It is also possible to use a substrate.

Reference numeral 61 is a keyboard unit arranged on the back side of the operation section 4 located on the front side of the lower main body 3, and includes an operation button 4a and a display body 4b exposed on the operation section 4 side, and a control circuit (not shown) for controlling them. It has a function of outputting various signals selected by the operation button 4a to various electrical components to be described later via the printed circuit board 60, and displaying a failure or other signal from the various electrical components on the display board 4b. . The keyboard unit = 61 and the printed circuit board 60 are a wire bundle 61b arranged substantially linearly along the bottom surface of the lower body 3 at the shortest distance.
Are electrically connected by.

Next, referring to FIG. 3B, the other main electric components arranged in the lower main body 3 will be described. Reference numeral 62 is the exit side A2 of the transfer paper conveying path.
With the power switch attached to the side wall surface, the output terminal 62a
Is located inside the lower body 3 and is electrically connected to the printed circuit board 60 through an electric wire 62b arranged substantially linearly along the bottom surface 3e of the lower body 3 at the shortest distance to control ON / OFF of the power source.

63 is a heater provided in the fixing device 36, which is arranged at a right angle to the carrying direction and has an output terminal 63a connected to the printed circuit board 6
Electric wire 63b formed on the 0 side and arranged in a straight line at almost the shortest distance
Are electrically connected to the printed circuit board 60.

Reference numeral 64 is an axial flow fan, and 65 is a high pressure unit, both of which are arranged on the bottom surface 3e of the lower main body 3 below the transfer device 34 (see FIG. 2). The axial fan 64 is provided to prevent the transfer paper from floating up from the conveyance path and send the transfer paper to the fixing device 36. The high-voltage unit 65 includes the charging device 22 and the transfer device.
It is for supplying high voltage power to 21.

In both of these, the output terminals 64a and 65a are formed on the printed circuit board 60 side, the electric wire 64b connecting to the output terminal 64a of the axial fan 64 is linear, and the output terminal 65a of the high-voltage unit 65 is 65a.
The electric wire 65b connected to the electric circuit 65 is electrically connected to the printed circuit board 60 at a substantially shortest distance while bypassing the vicinity of the axial fan 64. Other electrical components not explicitly shown in the figure are electrically connected to the printed circuit board 60 by the same method.

Reference numeral 66 is a primary unit fixed to the printed circuit board 60, which contains an interlock switch, a nozzle filter, a circuit protector, etc. in one case, and supplies AC power to each part of the main body.

As described above, the electric components including the keyboard unit 61 are arranged in the lower main body 3 fixed to the installation surface without rotating, and the printed circuit board 60 is parallel to the transfer paper conveyance direction A. Since the electric wires and the electric wire bundles that connect the two are arranged so as to maintain a substantially linear shortest distance, they do not hinder the transfer paper conveyance. Even if the upper body is rotated, the tensile force does not bend in the bundle of electric wires and the like, and there is no possibility that the electric wires will be broken.

Next, main electrical components other than those arranged in the lower main body 3 will be explained based on FIG. 3C. 67 is a cross flow fan provided in the cooling device 29, 68 is a halogen lamp used in the exposure device 23. , Are arranged at right angles to the carrying direction. Reference numeral 69 denotes an electric motor which constitutes the driving device 28, and is arranged near the hinge 43, that is, near the printed circuit board 60 as described above. Reference numeral 70 is a power transformer arranged on the front side of the electric motor on the side of the operating portion 4, and 71 is a lamp regulator for controlling the exposure amount of the halogen lamp 68, which is attached to the side wall surface 3d on the operating portion 4 side.

Similar to the electrical components arranged on the lower main body 3, these various electrical components have output terminals 67a, 68a, 69a, 70a formed on the printed circuit board 60 side, and electric wires 67b, 68b connected to the printed circuit board 60. , 69b, 70b are arranged in a substantially straight line at the shortest distance, and even if they are partially detoured, they are arranged at the shortest distance.

Thus, the printed circuit board 60 extends from the vicinity of the lower body side wall surface 3d on the hinge 43 mounting side toward the upper body 2 side or is disposed near the upper body side wall surface 2 on the hinge 43 mounting side. Therefore, even if the upper main body 2 is rotated to be divided and opened, the output terminals 67a of the electrical components and the printed circuit board 60 are separated.
Even if the distance is reduced, it does not increase. Therefore, even if the electric wires 67b connecting the electrical components 67 and the printed circuit board 60 are arranged in a substantially straight line so as to maintain the shortest distance,
67b ... does not pull and cause a broken line.

Also, the printed circuit board 60 is located at least on the upper body 2d side, and the connection between the printed circuit board 60 and the electrical equipment 67 ... Does not generate a tensile force, regardless of various electrical components arranged in the lower body 3. Since it can be connected to the
It is not necessary to bend it in three parts and extend it to the lower body 3 side to attach it, and therefore, it is possible to completely prevent a broken line accident due to bending when rotating the upper body 2d.

FIG. 4 is a schematic explanatory view in which the present invention is applied to a copying machine having a so-called lateral opening structure in which a fulcrum is formed on the entrance side or the exit side in the transfer paper conveyance direction and the upper main body rotates in the same direction as the conveyance direction. Is.

In this embodiment, a fulcrum 4 for rotating the upper body 2 '
Since the 3'position coincides with the inlet side or the outlet side of the transfer paper conveyance path, it does not interfere with the transfer paper conveyance path.
60 cannot be placed near the fulcrum 43 '. For this reason, the printed circuit boards 60a 'and 60b' are arranged on the back side of the operation section, that is, on one side wall surface parallel to the transfer paper conveyance direction, and the printed circuit board 60 is
Since the side wall surface on which a'and 60b 'are arranged is largely divided and opened by the rotation of the upper body 2', a printed circuit board is formed.
60a ', 60b' on upper body 2'and lower body 3'side wall surface 3
They are arranged separately near d'and 2d ', and both are supported by fulcrum 43'.
It may be electrically connected in the vicinity through a bendable connector 60c 'and the like. The printed circuit boards 60a ′, 6
As in the previous embodiment, 0b 'has a full width that can substantially cover the maximum width between the mounting positions of the output terminals of the electrical components (not shown) disposed in the upper body 2'and the lower body 3', respectively. is there.

According to this structure, even if the electric wire or the electric wire bundle that electrically connects the printed circuit boards 60a ', 60b' and various electric components is deviated in a substantially straight line or slightly detoured as in the above-described embodiment, the tensile force is reduced. It is possible to dispose at the shortest distance without causing Further, the various electric components arranged in the upper main body 2'and the various electric components arranged in the lower main body 3'are irrespective of each other, and the printed circuit boards 60a ', 60b are interposed via the electric wires and the electric wire bundles. It is also possible to make an electrical connection with ′.

As described above, the number of printed circuit boards is not limited to one, and a plurality of printed circuit boards are provided, and if they are electrically connected, it is easy to replace each circuit board.

As described above, the invention according to claim 1 shown in FIG.
In a so-called front opening structure electrophotographic apparatus in which the upper main body and the lower main body are configured to be split and opened around a pivot shaft provided on one side wall surface parallel to the conveyance direction of the recording paper conveyance path, It is applied to an electrophotographic apparatus in which various electric components fixedly arranged on the lower body side are electrically connectable to a printed circuit board fixedly arranged on the lower body side, and the printed circuit board is connected between output terminals of various electric component. The printed circuit board is configured to have a full width capable of substantially covering the maximum width, and the printed circuit board is arranged along the side wall surface on the pivotal shaft side from the lower body side to the position facing the output terminals of the various electrical components on the upper body side. By standing up and electrically connecting the printed circuit board and the output terminal via an electric wire, an electric wire connecting the printed circuit board and the output terminal can be formed even when the upper body is divided and opened. Even when wiring is performed in a substantially straight line without causing any pulling force so as not to generate a tensile force, no broken line is generated due to the division opening.

Further, in the invention according to claim 2 shown in FIG. 4, the upper main body and the lower main body are configured to be capable of being divided and opened around a pivot shaft provided on one side wall surface orthogonal to the conveyance direction of the recording paper conveyance path. In the so-called side-opening structure electrophotography, it is applied to an electrophotographic apparatus in which a printed circuit board is dividedly arranged on each main body side so as to be electrically connectable to various electric components fixedly arranged in each main body. The printed circuit boards arranged on the respective main bodies are formed with a total width capable of substantially covering the maximum width between the output terminals of various electric components arranged on the respective main bodies, and the respective printed circuit boards are formed on the recording paper. By arranging them along one side wall surface of the main body which is parallel to the conveying direction and electrically connecting the printed circuit boards arranged in the respective main bodies in the vicinity of the pivot shaft, Even by split open Even when the wires connecting the respective printed circuit boards and the output terminals are wired in a substantially straight line without causing any pulling force so as not to generate a tensile force, the electric wires connecting the respective printed circuit boards or the printed circuit boards to each other, etc. However, a broken line does not occur due to the division opening.

As a result, it becomes possible to install the electric wire or the like at a substantially shortest distance without arranging the electric wire or the like, which not only facilitates manufacturing and repair work, but also greatly reduces the broken line accident of the electric wire or the electric wire bundle. Further, since the electric wire or the electric wire bundle can be arranged in the space portion where the operator does not have to touch, the safety is improved.

Further, in any of the above-mentioned techniques, the various electric components arranged in the upper main body and the various electric components arranged in the lower main body are electrically connected to the printed circuit board through the electric wires and the electric wire bundles independently of each other. The parts can be easily replaced because they can be connected.

Further, even if the upper body is repeatedly opened and closed, it is possible to eliminate the possibility that the electric wire or the like connecting the printed circuit board and the output terminal or the printed circuit boards may be broken, or the insulating part may be worn out to expose the conductive part and cause electric leakage. .

It produces various remarkable effects such as.

[Brief description of drawings]

1 to 3 show the construction of a copying machine according to an embodiment of the present invention, FIG. 1 is an external view, FIG. 1A is a state in which an upper main body 2d is closed, and FIG. 1B is in an open state. Indicates. FIG. 2 is an overall sectional view of FIG. Fig. 3 shows the arrangement of various electric components arranged in the main body of the copying machine, Fig. 3A is a schematic side view showing the arrangement of the printed circuit board, and Fig. 3B is the arrangement of main electric components arranged in the lower body. Schematic plan view showing the state,
FIG. 3C is a schematic plan view showing an arrangement state of main electrical components arranged on the upper main body. FIG. 4 shows a copying machine according to another embodiment of the present invention, and is a schematic rear view showing an arrangement state of printed circuit boards.

Continuation of the front page (56) Reference JP-A-54-134643 (JP, A) Actually opened 57-75795 (JP, U) Actually opened 58-7391 (JP, U) Actually opened 59-9339 (JP , U) Actually opened 57-135765 (JP, U) Actually opened 54-113551 (JP, U) Actually opened 58-105567 (JP, U) Actually opened 56-78500 (JP, U) Special public 58-3941 (JP, B2) Shoukou Sho-31-378 (JP, Y2)

Claims (2)

[Claims] 1. An upper main body and a lower main body are configured such that they can be split and opened around a pivot shaft provided on one side wall surface parallel to the conveyance direction of a recording paper conveyance path and fixedly arranged in the upper main body. In an electrophotographic apparatus configured to electrically connect various electrical components to a printed circuit board that is fixedly arranged on the lower body side, a total width that can cover the maximum width between the output terminals of the various electrical components can be set to the printed circuit board. The printed circuit board is erected from the lower body side to the position facing the output terminals of the various electrical components on the upper body side along the side wall surface on the pivot shaft side, and An electrophotographic apparatus, wherein the output terminals are electrically connected via an electric wire. 2. An upper main body and a lower main body are configured such that they can be split and opened centering on a pivot shaft provided on one side wall surface orthogonal to the conveyance direction of the recording paper conveyance path, and fixedly arranged in each of the main bodies. In an electrophotographic apparatus in which a printed circuit board is separately arranged on each main body side so as to be electrically connectable to various electrical component parts, a printed circuit board arranged on each main body is The printed circuit boards are formed to have a full width capable of substantially covering the maximum width between the output terminals of the components, and the respective printed circuit boards are arranged along one side wall surface of the main body parallel to the recording paper conveyance direction. An electrophotographic apparatus characterized in that the printed circuit boards arranged in the above are electrically connected to each other in the vicinity of the pivot.