JP2000127555A - Imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a high voltage wire from being broken through contact with a power transmission gear when it is wired closely thereto. SOLUTION: A high voltage wire 25 is wired closely to a power transmission gear 20 and a member 26 for covering the high voltage wire 25 and partitioning it from the gear 20 is fixed closely to the gear 20. The cover member 26 prevents the high voltage wire 25 from coming into contact with the gear 20 and the high voltage wire 25 is protected against breakage due to such a contact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus.

[0002]

2. Description of the Related Art Conventionally, there has been a strong demand for miniaturization of image forming apparatuses such as copiers and printers, and by miniaturizing image forming apparatuses, gears for power transmission, controllers, power supply units, communication boards, fixing boards, and the like have been developed. It is necessary to efficiently arrange devices and the like in a narrow space, and to efficiently wire high-voltage wires connecting the heater of the fixing device and the power supply unit in the narrow space.

When high-voltage wires are wired near a controller or a communication board, noise generated from the high-voltage wires causes
An error may occur in data transmitted and received by the controller and the communication board, and the quality of the formed image may be degraded.

For this reason, it is necessary to wire the high-voltage wires at a position distant from the controller and the communication board, and the high-voltage wires are routed near the power transmission gears. A power switch that is turned off when the cover is opened and turned on when the cover is closed, a movable member that turns the power switch on and off, and the like are arranged near the position where the gear is arranged.

[0005]

However, when a high-voltage electric wire is wired near a power transmission gear or a movable member for switching a power switch, the high-voltage electric wire comes into contact with these gears or the movable member and breaks. Fire may occur due to disconnection.

Accordingly, the present invention is directed to a high voltage electric wire which is in contact with a gear or a movable member even if the high voltage electric wire is wired near a movable member for turning on / off a power transmission gear or a switch. An object of the present invention is to provide an image forming apparatus capable of preventing disconnection due to contact.

[0007]

According to the first aspect of the present invention,
In an image forming apparatus in which a high-voltage wire is wired near a power transmission gear, a cover member that covers the high-voltage wire and separates the gear from the gear is attached at a position close to the gear.

Therefore, even if the high-voltage electric wire is wired near the gear, the high-voltage electric wire is prevented from contacting the gear, and the high-voltage electric wire is prevented from being disconnected due to such contact.

According to a second aspect of the present invention, the switch is turned on.
In an image forming apparatus in which a high-voltage wire is wired at a position close to a movable member to be turned off, a cover member that covers the high-voltage wire and separates the movable member from the movable member is attached close to the movable member.

Therefore, even if the high-voltage electric wire is wired near the movable member, the high-voltage electric wire is prevented from coming into contact with the movable member, and the high-voltage electric wire is prevented from being disconnected due to such contact.

According to a third aspect of the present invention, in the image forming apparatus according to the first or second aspect, a storage recess for storing the high-voltage electric wire is provided on the cover member, the storage recess having an open portion opened outward. Then, an exterior plate was arranged at a position covering the open portion and in proximity to the open portion.

Therefore, even if vibrations during transportation or the like are transmitted to the image forming apparatus, the high-voltage wires are prevented from coming off the storage recess of the cover member, and the state of being housed in the storage recess is maintained. For this reason, the high-voltage electric wire detached from the storage recess is prevented from contacting the gear and the movable member,
Breakage of the high-voltage electric wire due to such contact is prevented. In addition, the cover member acts as a reinforcing beam for the exterior panel, making it difficult for the exterior panel to break even if an external impact is applied to the exterior panel, and preventing the high-voltage wires from being exposed to the outside from the broken part of the exterior panel. Is done.

According to a fourth aspect of the present invention, in the image forming apparatus of the first, second or third aspect, a hole is formed in the main body structure to draw an end of the high-voltage wire into the inside of the main body structure. A locking portion is formed on an edge of the hole, and a closing projection locked on the locking portion to close an outer end surface of the hole is formed on the cover member.

Therefore, after the end portion of the high-voltage electric wire is drawn into the inside of the main body structure from the hole, the closing projection is locked to the locking portion, so that the high-voltage electric wire drawn into the inside of the main body structure is removed from the hole. It is prevented that the high-voltage electric wire goes out of the hole and contacts the gear and the movable member, and the high-voltage electric wire is prevented from breaking due to such contact.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a perspective view showing the entire structure of a copying machine 1 which is an image forming apparatus. Below the copying machine 1, a paper feeding device 2 for feeding large-sized paper (for example, B4 size paper) is detachably attached. A front cover 3 that can be opened and closed is provided on the front side of the copying machine 1, and a document table 4 and an operation panel 5 are provided on the upper surface.
The paper tray 6 is provided on the back side of the copying machine 1. On one side of the copying machine 1, an exterior plate 7 is provided.
Is detachably attached.

FIG. 2 is a plan view schematically showing the internal structure of the copying machine 1. A frame-shaped body structure 8 is provided inside the copying machine 1, and a body cover such as an exterior plate 7 is attached to the outside of the body structure 8. Inside the main body structure 8, a motor 9, a power supply unit 10,
Communication board 11, controller 12, paper feed roller 13,
A process cartridge 14, a fixing device 15, and the like are arranged. A photosensitive drum 16 is rotatably provided in the process cartridge 14, and a fixing roller 17 is rotatably provided in the fixing device 15. A paper inlet 18 through which paper supplied from the paper supply device 2 enters is formed between the paper supply roller 13 and the process cartridge 14 on the bottom surface of the main body structure 8.

FIG. 3 is a side view showing the copying machine 1 with the outer plate 7 removed. A mounting space 19 is formed between the outer surface of the main body structure 8 and the exterior plate 7 (see FIG. 2). In the mounting space 19, the driving force from the motor 9 is supplied by the feed roller 13, Numerous gears 20 to be transmitted to the photoconductor drum 16, the fixing roller 17, etc., and the front cover 3
The pivot lever 22 pivots around the support shaft 21 in conjunction with the opening / closing operation of the leaf spring 23. The leaf spring 23, which is a movable member that is pressed and pivoted by the pivot lever 22, is turned on / off by the rotation of the leaf spring 23. A power switch 24 which is a switch to be operated is attached.

Further, in the mounting space 19, a high-voltage electric wire 25 for connecting the power supply unit 10 and a heater in the fixing roller 17 is provided.
A cover member 26 that partitions between the gear 5 and the gear 20 and the leaf spring 23 is attached. The cover member 26 is provided at a position facing the side surface of one gear 20.

The cover member 26 has a recess 27 for accommodating the high-voltage electric wire 25, and an opening 28 that is open outward is formed on one surface of the recess 27. The cover member 26 is fixed to the main body structure 8 by a fixing screw 29.
The exterior plate 7 covers the opening 28 at a position close to the opening 28.

A hole 30 for drawing the end of the high-voltage electric wire 25 into the inside of the main body structure 8 is formed on the front end side (the fixing roller 17 side) of the main body structure 8. A part 31 is formed. An end of the high-voltage wire 25 drawn into the inside of the main body structure 8 from the hole 30 is connected to a heater in the fixing roller 17. Cover member 2
6 is provided with a closing projection 32 at one end thereof. The closing projection 32 is fixed to the locking portion 31 in a state where the cover member 26 is screwed to the main body structure 8, so that the outside of the hole 30 is formed. Close the end face.

In such a configuration, in the copying machine 1, the driving force from the motor 9 is transmitted to the paper feed roller 13, the photosensitive drum 16, the fixing roller 17 and the like via the gear 20, and the copying operation is performed. . Further, by rotating the front cover 3 to the closed position, the rotating lever 22 pressed by the front cover 3 rotates clockwise around the support shaft 21 and is pressed by the rotating lever 22. The leaf spring 23 rotates to the position shown by the solid line in FIG.
Is turned on (the state shown in FIG. 2). Meanwhile, the front cover 3
Is turned to the open position, the pressing force from the front cover 3, which has turned the turning lever 22 clockwise, disappears, and the leaf spring 23 is moved by its own elasticity to the position indicated by the two-dot chain line in FIG. And the rotation lever 22 is rotated counterclockwise around the support shaft 21, and the power switch 24 is turned off.

In the mounting space 19 where the gear 20 and the leaf spring 23 are mounted, the gear 20 and the leaf spring 23
, And a high-voltage electric wire 25 is arranged at a position facing one side of one gear 20. However, this high-voltage electric wire 25 is not
7 and is partitioned from the gear 20 and the leaf spring 23. For this reason, the high voltage electric wire 25 is prevented from contacting the gear 20 and the leaf spring 23, and the high voltage electric wire 25 is prevented from being disconnected due to such contact.

Next, since one surface of the storage recess 27 of the cover member 26 is formed as an open portion 28, when the high-voltage electric wire 25 is stored in the storage recess 27, it is only necessary to push the high-voltage wire 25 from the open portion 28. In addition, the work of storing the high-voltage electric wire 25 in the storage recess 27 can be easily performed without trouble.

After the cover member 26 accommodating the high-voltage electric wire 25 is screwed to the main body 8 in the accommodating recess 27, the exterior plate 7 is attached so as to cover the cover member 26 and the gear 20. The exterior plate 7 is close to the opening 28
Therefore, even if vibrations during transportation or the like are transmitted to the copying machine 1, the high-voltage wires 25 are prevented from coming off the storage recesses 27, and the high-voltage wires 25 are maintained in the storage recesses 27. You. For this reason, the high-voltage electric wire 25 detached from the storage recess 27 is prevented from contacting the gear 20 and the leaf spring 23, and the high-voltage electric wire 25 is prevented from being disconnected due to such contact.

Further, since the exterior plate 7 and the cover member 26 are located close to each other, the cover member 26 functions as a reinforcing beam for the exterior plate 7. For this reason, even if an external impact is applied to the exterior plate 7, the exterior plate 7 is less likely to be broken, and the exterior plate 7 is prevented from being broken and the high-voltage wires 25 being exposed to the outside from the cracked portion.

When the cover member 26 is screwed to the main body structure 8, the locking projection 32 formed at one end of the cover member 26 is locked to the locking portion 31 formed at the edge of the hole 30. The locking projection 32 closes the outer end of the hole 30. For this reason, the high-voltage electric wire 25 drawn into the inside of the main structure 8 from the hole 30 is prevented from coming out of the hole 30, and the high-voltage electric wire 25 coming out of the hole 30 is connected to the gear 20.
And the high-voltage wire 25 is prevented from breaking due to such contact.

[0027]

According to the image forming apparatus of the first aspect of the present invention, when a high-voltage electric wire is wired close to a power transmission gear, the cover covers the high-voltage electric wire and separates from the gear. Since the member is attached to the position close to the gear, even if the high-voltage wire is wired near the gear, the high-voltage wire can be prevented from contacting the gear, and the high-voltage wire can be prevented from breaking due to such contact. Further, it is possible to prevent the occurrence of a fire due to the disconnection of the high-voltage electric wire, thereby improving safety.

According to the image forming apparatus of the present invention, when a high-voltage electric wire is laid at a position close to the movable member for turning on / off the switch, the high-voltage electric wire is covered to cover the movable member. The cover member that separates the high-voltage wires is attached to the movable member so that the high-voltage wires can be prevented from coming into contact with the movable member even if the high-voltage wires are routed close to the movable members. Can be prevented, and the occurrence of a fire due to the disconnection of the high-voltage electric wire can be prevented to improve safety.

According to the image forming apparatus of the present invention, a storage recess having an open portion opened outward is formed in the cover member of the first or second aspect, and the inside of the storage recess is formed. The high-voltage electric wire is housed in the housing, and the exterior plate is arranged close to the open portion at a position covering the open portion. It can be prevented from coming off, and the state of being stored in the storage recess can be maintained. For this reason, it is possible to prevent the high-voltage wires coming out of the storage recesses from coming into contact with the gears and the movable member, to prevent the high-voltage wires from being disconnected by such contact, and to prevent fire from being caused by the disconnection of the high-voltage wires. Safety can be improved.
In addition, since the cover member acts as a reinforcing beam for the exterior panel, it is difficult for the exterior panel to break even if an external impact is applied to the exterior panel, and that the high-voltage wires are exposed to the outside from the cracked portion of the exterior panel. Can be prevented.

According to the image forming apparatus of the fourth aspect, in the image forming apparatus of the first, second or third aspect,
A hole is formed in the main body structure to draw the end of the high-voltage electric wire into the inside of the main body structure, a locking portion is formed at the edge of the hole, and the outer end surface of the hole is locked by the locking portion. Since the closing projection is formed on the cover member, the closing projection is locked to the locking portion, so that the high-voltage electric wire drawn into the inside of the main body structure from the hole can be prevented from coming out of the hole, and the hole can be prevented. To prevent the high-voltage electric wire coming out of the window from coming into contact with the gears and movable members, prevent the high-voltage electric wire from breaking due to such contact, and prevent fire from occurring due to the high-voltage electric wire breaking and improve safety. Can be done.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire structure of a copying machine according to an embodiment of the present invention.

FIG. 2 is a plan view schematically showing the internal structure of the copying machine.

FIG. 3 is a side view showing the copying machine in a state where an exterior plate is removed.

FIG. 4 is a sectional view taken along line AA in FIG.

FIG. 5 is a sectional view taken along line BB in FIG. 3;

FIG. 6 is a sectional view taken along line CC in FIG. 3;

[Explanation of symbols]

 Reference Signs List 7 exterior plate 8 main body structure 20 gear 23 movable member 24 switch 25 high-voltage electric wire 26 cover member 27 storage recess 28 open portion 30 hole 31 locking portion 32 closing projection

Claims (4)

[Claims] 1. An image forming apparatus in which a high-voltage wire is wired close to a power transmission gear, wherein a cover member that covers the high-voltage wire and separates from the gear is attached at a position close to the gear. An image forming apparatus characterized in that: 2. An image forming apparatus in which a high-voltage electric wire is wired near a movable member for turning on / off a switch, wherein a cover member that covers the high-voltage electric wire and separates the movable member from the movable member is provided. An image forming apparatus, wherein the image forming apparatus is mounted close to the image forming apparatus. 3. An exterior plate provided with an opening that is open outward and that houses the high-voltage wire in the cover member, and is located close to the opening at a position that covers the opening. The image forming apparatus according to claim 1, wherein the image forming apparatus is disposed. 4. A hole is formed in the main body structure to draw an end of the high-voltage electric wire into the inside of the main body structure, a locking portion is formed at an edge of the hole, and the hole is locked by the locking portion. 4. The image forming apparatus according to claim 1, wherein a closing projection for closing an outer end surface of the hole is formed on the cover member.