JP5532428B2 - Flat cable guide member and image forming apparatus - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat cable guide member that guides a flat cable used for connecting an electrical component of various electrical equipment, and an image forming apparatus such as a printer, a facsimile, and a copying machine that includes the flat cable guide member. .

  In an image forming apparatus using various electrical components, a harness is used to connect electrical components. The harness is a lead wire whose core wire is covered with a so-called insulating resin, and may be used as a single wire, but is often used collectively depending on the structure of the wiring portion. When harnesses are used together, they may be flexible flat cables arranged side by side so that the installation space is smaller than when bundled (Patent Document 1, etc.).

  When this flat cable can be wound around in the apparatus, the flat cable is guided and held by the flat cable guide member, so that the flexible flat cable is greatly bent and comes into contact with other members in the apparatus and is damaged. Can be suppressed.

  Since the space in which the flat cable can be wound in the apparatus is limited due to the downsizing of the apparatus or the like, there are cases in which a plurality of flat cables can be stacked and wound in the apparatus. However, when a signal is transmitted by a flat cable, an electromagnetic wave is generated by a current flowing through the flat cable. Therefore, the generated electromagnetic wave interferes with each other and the signal transmitted by the flat cable is disturbed.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a flat cable guide member and an image forming apparatus capable of suppressing electromagnetic waves generated from flat cables from interfering with each other and disturbing signals. Is to provide.

In order to achieve the above object, according to the first aspect of the present invention, a space is formed between flat cables in a flat cable guide member that is provided in a structure and guides a plurality of flat cables in the same direction while overlapping and holding them. Thus, it has the partition member which partitions off a flat cable.
According to a second aspect of the present invention, in the flat cable guide member of the first aspect, the partition member is formed integrally with the flat cable guide member main body.
Further, the invention of claim 3 is the flat cable guide member according to claim 1 or 2, wherein a flat cable having a high frequency among a plurality of flat cables is passed near a portion made of sheet metal of the structure. It is characterized by that.
According to a fourth aspect of the present invention, in the flat cable guide member according to the first, second, or third aspect, the partition members are provided alternately in a flat cable width direction that is a direction orthogonal to the longitudinal direction over the flat cable longitudinal direction. It is characterized by this.
According to a fifth aspect of the present invention, in the flat cable guide member of the first, second, third, or fourth aspect, the flat cable is placed so that the flat cable is positioned between the structure and the flat cable guide member. It is characterized by holding.
According to a sixth aspect of the present invention, there is provided an image forming means for forming an image on a recording medium, a flat cable for electrically connecting a plurality of electrical members provided on the image forming means, and an apparatus structure provided with the device. A flat cable guide member according to claim 1, wherein the flat cable guide means is a flat cable guide means for guiding a plurality of flat cables in the same direction while holding them in a stacked manner. It is characterized by using.

  In the present invention, since the flat cable is partitioned by the partition member so that a space is formed between the flat cables held on the flat cable guide member, the distance between the flat cables can be made constant. The influence of electromagnetic waves between the stacked flat cables can be reduced by increasing the distance between the flat cables. Therefore, by making the distance between the flat cables constant by the partition member, the influence of electromagnetic waves between the flat cables can be reduced as compared with the case where the flat cables are in close contact with each other. Therefore, since the influence of the electromagnetic waves between the flat cables is reduced, it is possible to suppress the electromagnetic waves generated from the flat cables from interfering with each other and disturbing the signal.

  As described above, according to the present invention, there is an excellent effect that electromagnetic waves generated from flat cables can be prevented from interfering with each other between flat cables and disturbing signals.

Sectional drawing of a flat cable guide and a stay. 1 is a perspective view of an image forming apparatus according to an embodiment. 1 is a schematic cross-sectional view of an image forming apparatus according to an embodiment. FIG. 3 is a rear half sectional view of the image forming apparatus according to the embodiment. FIG. 3 is a rear half sectional view of the image forming apparatus according to the embodiment. Schematic perspective view of flat cable guide and stay FIG. 3 is a perspective view when the flat cable guide is viewed from the lower side when attached to the copying machine.

  Hereinafter, as an example of an embodiment of an image forming apparatus to which the present invention is applied (hereinafter, this embodiment is referred to as “Embodiment 1”), an electrophotographic copying machine (hereinafter simply referred to as a copying machine 100) will be described. .

  FIG. 2 is a perspective view of the copying machine according to the present embodiment, and FIG. 3 is a schematic sectional view of the copying machine 100. An operation unit 3 for performing various operations by a user is provided on the front surface of the copying machine 100, and a reading unit 4 for reading a document or the like and providing data is provided on the upper portion. An image portion 5 is provided. Further, in the lower part, paper is collected and the paper P is fed to the image forming unit 5 one by one, and the paper P fed from the paper feeding unit 6 to the conveyance path 70 is conveyed to the conveyance roller pair 71 and the resist. A transport unit 7 that transports the roller pair 72 is provided. The paper P delivered from the paper supply unit 6 passes through the conveyance path 70 of the conveyance unit 7, and an image is placed on the image creation unit 5 that creates an image, and a paper discharge tray unit between the image creation unit 5 and the reading unit 4. 9 performs a series of operations such as those stored in 9.

  A basic configuration of the copying machine 100 will be described. FIG. 2 is a schematic configuration diagram of the copying machine 100. The copying machine 100 includes four process cartridges 26Y, 26M, 26M, 26M, 26F, 26Y, 26M, 26M, 26F, 26Y, 26M, 26M C and K are provided. These use Y, M, C, and K toners of different colors as the image forming material, but the other configurations are the same and are replaced when the lifetime is reached. Taking the process cartridge 26Y for generating a Y toner image as an example, a photosensitive member 21Y as a drum-shaped image carrier, a drum cleaning device (not shown), a charge eliminating device (not shown), a charging device 24Y, and a developing device 25Y. Etc. The process cartridge 26Y is detachable from the copying machine 100 main body, so that consumable parts can be replaced at a time.

  The charging device 24Y uniformly charges the surface of the photoreceptor 21Y that is rotated clockwise in the drawing by a driving unit (not shown). The uniformly charged surface of the photoconductor 21Y is exposed and scanned with a laser beam to carry an electrostatic latent image for Y. The Y electrostatic latent image is developed into a Y toner image by the developing device 25Y using Y toner. Then, intermediate transfer is performed on the intermediate transfer belt 38. The drum cleaning device removes the toner remaining on the surface of the photoreceptor 21Y after the intermediate transfer process. The static eliminator neutralizes residual charges on the photoreceptor 21Y after cleaning. By this charge removal, the surface of the photoreceptor 21Y is initialized and prepared for the next image formation. Similarly, in the other process cartridges 26M, C, and K, M, C, and K toner images are formed on the photoreceptors 21M, C, and K, and are intermediately transferred onto the intermediate transfer belt 38.

  Under the process cartridges 26Y, 26M, 26C, and 26K, an exposure device 27 serving as a latent image forming unit is disposed. The exposure device 27 irradiates each of the photoconductors 21Y, 21M, 21C, and 21K in the process cartridges 26Y, 26M, 26C, and 26K with laser light emitted based on the image information. By this exposure, electrostatic latent images for Y, M, C, and K are formed on the photoreceptors 21Y, 21M, 21C, and 21K. The exposure device 27 irradiates the photoconductors 21Y, 21M, 21C, and 21K through a plurality of optical lenses and mirrors while scanning a laser beam emitted from a light source with a polygon mirror that is rotationally driven by a motor.

  On the lower side of the exposure device 27 in the drawing, a paper storage unit 61 that stores a transfer paper P that is a recording medium, a paper feed unit 6 including a paper feed roller 62, and transport for transporting the transfer paper P in a transport path 70. A conveying section 7 having a roller pair 71, a registration roller pair 72, and the like is disposed.

  A plurality of transfer papers P are stored in the paper storage cassette 61, and a paper feed roller 62 is in contact with the uppermost transfer paper P. When the paper feed roller 62 is rotated counterclockwise in the drawing by a driving means (not shown), the uppermost transfer paper P is fed toward the transport path 70 of the transport unit 7. The transfer paper P thus fed into the conveyance path 70 of the conveyance unit 7 is conveyed to the registration roller pair 72 by the conveyance roller pair 71. The registration roller pair 72 rotationally drives both rollers to sandwich the transfer paper P, but temporarily stops rotating immediately after sandwiching. Then, the transfer paper P is sent out toward a secondary transfer nip described later at an appropriate timing.

  Above the process cartridges 26Y, 26M, 26C, and 26K, an intermediate transfer unit 35 that moves the intermediate transfer belt 38 as an intermediate transfer member endlessly while being stretched is disposed. In addition to the intermediate transfer belt 38, the intermediate transfer unit 35 includes four primary transfer bias rollers 29Y, 29M, 29C, and 29K, a cleaning device (not shown) that cleans the surface of the intermediate transfer belt 38, and the like. A secondary transfer backup roller 32, a stretching roller 33, a tension roller 34, and the like are also provided.

  The intermediate transfer belt 38 is endlessly moved in the counterclockwise direction in the drawing by the rotational drive of at least one of the rollers while being stretched by the secondary transfer backup roller 32, the stretch roller 33, and the tension roller 34.

  The primary transfer bias rollers 29Y, 29M, 29C, and 29K each have an intermediate transfer belt 38 that is moved endlessly in this manner, between the photoreceptors 21Y, 21M, 21C, and 21K, thereby forming primary transfer nips. In these methods, a transfer bias having a polarity opposite to that of toner (for example, plus) is applied to the back surface (loop inner peripheral surface) of the intermediate transfer belt 38. All the rollers except the primary transfer bias rollers 29Y, M, C, and K are electrically grounded.

  The intermediate transfer belt 38 passes through the primary transfer nips for Y, M, C, and K sequentially along with the endless movement thereof, and Y, M, C, K toner images are superimposed and primarily transferred. As a result, a four-color superimposed toner image (hereinafter referred to as a four-color toner image) is formed on the intermediate transfer belt 38.

  The secondary transfer backup roller 32 sandwiches an intermediate transfer belt 38 between the secondary transfer roller 39 and a secondary transfer nip. The four-color toner image formed on the intermediate transfer belt 38 is transferred to the transfer paper P at the secondary transfer nip. Untransferred toner that has not been transferred onto the transfer paper P adheres to the intermediate transfer belt 38 after passing through the secondary transfer nip. This untransferred toner is removed from the intermediate transfer belt 38 by a cleaning device (not shown).

  In the secondary transfer nip, the transfer paper P is sandwiched between the intermediate transfer belt 38 and the secondary transfer roller 39 whose surfaces move forward in the forward direction, and is located downstream of the secondary transfer nip in the transfer paper transport direction. It is conveyed toward the fixing device 40. When the transfer paper P sent out from the secondary transfer nip passes between rollers of the fixing device 40, the four-color toner image transferred to the surface is fixed by heat and pressure. Thereafter, the transfer paper P is discharged out of the apparatus through a pair of paper discharge rollers 91. A stack unit 30 is formed on the upper surface of the copying machine main body, and the transfer paper P discharged to the outside by the discharge roller pair 91 is sequentially stacked on the stack unit 30.

  A bottle accommodating portion 81 is provided between the intermediate transfer unit 35 and the stack portion 30 located above the intermediate transfer unit 35. The bottle storage unit 81 stores toner bottles 82Y, 82M, 82C, and 82K as developer containers that store Y, M, C, and K toners. The Y, M, C, and K toners in the toner bottles 82Y, 82M, 82C, and 82K are appropriately supplied to the developing devices 25Y, M, C, and K of the process cartridges 26Y, 26M, 26C, and 26K, respectively, by a toner supply device (not shown). To be replenished. The toner bottles 82Y, 82M, 82C, and 82K and the process cartridges 26Y, 26M, 26C, and 26K can be attached to and detached from the copying machine 100 body independently.

  FIG. 4 is a rear half sectional view of the copying machine 100, and FIG. 5 is a rear half sectional view of the copying machine 100 in a half section so that a portion closer to the inside of the copying machine 100 can be seen than in FIG.

  On the right side behind the operation unit 3 of the copying machine 100, an interface surface 10 having a connection portion such as a USB, a net cable, or a telephone line that can be accessed with an external terminal is provided. It has been. Inside the interface surface 10, there is a controller board 11 that processes and controls information from an external terminal, and an exposure apparatus 27 and an IPU board 12 that controls the reading unit 4 installed immediately next to the interface board 10 are connected. .

  Below the IPU board 12 and the controller board 11, there is provided a PSU board 13 that takes in an AC power supply from the outside, converts it into a 5V or 24V DC power supply, and supplies power. Further, below the IPU board 12 and the controller board 11 and on the PSU board 13, a stay 14 which is a part of the structure of the copying machine 100 and made of a sheet metal member is installed in the horizontal direction.

  Inside the copying machine 100 of the PSU board 13 is a BCU board 15 for controlling the image forming unit 5, the paper feeding unit 6, the transport unit 7, and the like. The BCU board 15 and the IPU board 12 are two flat cables. 16 is connected.

  The flat cable 16 coming out from the upper part of the BCU board 15 passes over the stay 14 made of a sheet metal member and comes out to the left side of the IPU board 12 in FIG. 5 and is connected to the IPU board 12. At this time, the two flat cables 16 are held in a state in which the path from the BCU board 15 to the IPU board 12 is guided by the flat cable guide 1 formed integrally with the resin component on the stay 14.

  6 is a schematic perspective view of the flat cable guide 1 and the stay 14, FIG. 1 is a cross-sectional view of the flat cable guide 1 and the stay 14, and FIG. 7 is a view when the flat cable guide 1 is attached to the copying machine 100. It is the single-piece | unit perspective view seen from the side used as the downward direction.

  As shown in FIG. 1, the flat cable guide 1 includes a flat cable guide 1 between two flat cables 16 a and 16 b that overlap between an upper plate portion 1 c and a lower plate portion 1 d that are formed integrally with the main body of the flat cable guide 1. A plurality of partition plates 1 a for partitioning the flat cable 16 a and the flat cable 16 b are provided integrally with the main body of the flat cable guide 1 so as to enter and form a space at an appropriate distance between the flat cables. In the present embodiment, the flat cable 16b is assembled between the partition plate 1a and the upper plate portion 1c of the flat cable guide 1, and the flat cable 16a is assembled between the partition plate 1a and the lower plate portion 1d. As shown in FIG. 7, the partition plate 1 a is alternately arranged in the flat cable width direction which is a direction orthogonal to the longitudinal direction over the signal line energization direction of the flat cables 16 a and 16 b which is the flat cable longitudinal direction with respect to the flat cable guide 1. Is provided. As a result, the amount of deformation of the flat cable 16b can be reduced during assembly so that the flat cable 16b can be assembled between the partition plate 1a and the upper plate portion 1c. Therefore, the flat cable 16b is assembled to the flat cable guide 1. Can be improved.

  Further, as shown in FIG. 7, the flat cable guide 1 is provided with several claws 1b, and the stay is so that the lower surface of the lower plate portion 1d of the flat cable guide 1 and the upper surface of the upper plate portion 14a of the stay 14 are in contact with each other. The flat cable guide 1 can be easily assembled to the stay 14 by hooking the claw 1b on the upper plate portion 14a of the stay 14 while the flat cable guide 1 is slid in the longitudinal direction.

  By combining the flat cable guide 1 composed of resin parts with the flat cable 16 that is largely bent by itself and whose shape is not fixed, and then attaching the flat cable guide 1 containing the flat cable 16 to the stay 14 Since the flat cable 16 and the flat cable guide 1 are integrated, the flat cable 16 can be easily assembled to the apparatus.

  Further, since the flat cables 16a and 16b are held by the flat cable guide 1, the flat cables 16a and 16b can be prevented from being greatly bent. Therefore, it is possible to arrange the flat cables 16a and 16b in a narrow space while suppressing the flat cables 16a and 16b from bending and interfering with other members and damaging them, and to perform space-saving cable winding.

  Here, the influence of electromagnetic waves between the flat cables stacked in the vertical direction affects the square of the distance between the flat cables, and the distance between the flat cables is slightly increased in the vertical direction from the state where the flat cables are almost in close contact with each other. It has been found that it is greatly reduced only by breaking. Therefore, the space between the flat cable 16a and the flat cable 16b is provided by the partition plate 1a, and the flat cables are separated from each other, thereby reducing the influence of electromagnetic interference between the flat cables. Therefore, by separating the flat cables, it is possible to prevent the other signal from being disturbed (crosstalk) due to interference with the other flat cable caused by electromagnetic waves generated by current flowing through the one flat cable.

  Further, by providing a space between the flat cables with the partition plate 1a provided integrally with the main body of the flat cable guide 1 as in this embodiment, a partition plate separate from the main body of the flat cable guide 1 is provided. Since the number of parts can be reduced as compared with the case of attaching a conductive shielding member between the flat cables, the assembling property can be improved and the cost can be reduced accordingly.

  And it can control by the IPU board | substrate 12 to which flat cable 16a, 16b was connected because it can suppress that the electromagnetic waves which generate | occur | produce from flat cable 16a and flat cable 16b interfere with each other in this way, and a signal disturbs. The writing unit and reading unit 4, the image forming unit 5 controlled by the BCU substrate 15, the paper feeding unit 6, the transport unit 7 and the like may malfunction due to the disturbance of the signals of the flat cables 16a and 16b. Can be suppressed.

  Further, of the flat cable 16a and the flat cable 16b, the flat cable 16a is a signal line having a high frequency (for example, 50 [MHz] or more) for transmitting an image signal between the BCU board 15 and the IPU board 12, and the flat cable 16a is a sheet metal. The flat cable 16a is held while being guided by the flat cable guide 1 so as to crawl near the stay 14 which is a member.

  It has been found that when a current having a frequency is passed near a conductor, an electromagnetic field is suppressed by generating a reverse magnetic field. Therefore, by causing the flat cable 16a to which a signal of a high frequency is sent to be close to the stay 14 made of a sheet metal member, mutual interference of electromagnetic waves between the flat cables can be further reduced, and EMC (Electromagnetic Compatibility) -like. Can be better.

  Further, the flat cables 16 a and 16 b are held between the stay 14 and the flat cable guide 1, so that the flat cables 16 a and 16 b are covered with the flat cable guide 1. Thereby, it can suppress that the movable member etc. which move within an apparatus collide with flat cable 16a, 16b, and can suppress that flat cable 16a, 16b is damaged by external force.

As described above, according to the present embodiment, in the flat cable guide 1 that is a flat cable guide member that is provided in the structure and guides the flat cables 16a and 16b that are a plurality of flat cables in an overlapping manner, the flat cable It has a partition plate 1a which is a partition member for partitioning the flat cable 16a and the flat cable 16b so that a space is formed therebetween. By dividing the flat cable 16a and the flat cable 16b by the partition plate 1a so that a space is formed between the flat cable 16a and the flat cable 16b, the distance between the flat cables can be made a fixed distance. Thereby, the influence of the electromagnetic waves of flat cables can be reduced. Therefore, it is possible to suppress the electromagnetic waves generated from the flat cables 16a and 16b from interfering with each other and disturbing the signal.
Moreover, according to this embodiment, since the partition plate 1a is comprised integrally with the main body of the flat cable guide 1, it is cheaper than the case where the partition plate 1a is provided separately from the main body of the flat cable guide 1. Can be achieved.
Moreover, according to this embodiment, it comprised so that the flat cable 16a of an early frequency may pass along the stay 14 which is a part which consists of a sheet metal of the said structure among several flat cables 16a and 16b. When a current having a frequency is passed near the conductor, an electromagnetic field is suppressed by generating a reverse magnetic field. Therefore, by causing the flat cable 16a having a high frequency near the stay 14 made of a sheet metal member, the mutual interference of electromagnetic waves between the flat cables can be further reduced, and the EMC can be improved.
Further, according to the present embodiment, the partition plates 1a are alternately provided in the flat cable width direction which is a direction orthogonal to the longitudinal direction over the signal line energization direction of the flat cables 16a and 16b which is the flat cable longitudinal direction. Since the amount of deformation of the flat cable 16b can be reduced and assembled to the flat cable guide 1 when assembled, the assemblability of the flat cable 16b to the flat cable guide 1 can be improved.
Further, according to the present embodiment, the flat cables 16 a and 16 b are held by the flat cable guide 1 so that the flat cables 16 a and 16 b are positioned between the stay 14 and the flat cable guide 1. Thereby, since the flat cables 16a and 16b are covered with the flat cable guide 1, it is possible to prevent a movable member or the like movable in the apparatus from colliding with the flat cables 16a and 16b, and the flat cables 16a and 16b are damaged by an external force. Can be suppressed.
Further, according to the present embodiment, by using the flat cable guide 1 of the present invention in an image forming apparatus such as the copying machine 100, electromagnetic waves generated from the flat cable 16a and the flat cable 16b interfere with each other between the flat cables. Can be prevented from being disturbed, the writing unit and reading unit 4 controlled by the IPU substrate 12 to which the flat cables 16a and 16b are connected, the image forming unit 5 controlled by the BCU substrate 15, and the paper feed It is possible to prevent the malfunction caused by the disturbance of the signals of the flat cables 16a and 16b in the unit 6 and the transport unit 7 and the like.

DESCRIPTION OF SYMBOLS 1 Flat cable guide 1a Partition plate 1b Claw 1c Upper board part 1d Lower board part 2 Image forming apparatus 3 Operation part 4 Reading part 5 Image formation part 6 Paper feed part 7 Conveyance part 9 Paper discharge tray part 10 Interface surface 11 Controller board 12 IPU substrate 13 PSU substrate 14 Stay 14a Upper plate portion 15 BCU substrate 16 Flat cable 21 Photoconductor 24 Charging device 25 Developing device 26 Process cartridge 27 Exposure device 29 Primary transfer bias roller 30 Stack portion 32 Secondary transfer backup roller 33 Stretching roller 34 Tension roller 35 Intermediate transfer unit 38 Intermediate transfer belt 39 Secondary transfer roller 40 Fixing device 61 Paper storage cassette 62 Paper feed roller 70 Transport path 71 Transport roller pair 72 Registration roller pair 81 Bottle storage section 82 Toner bottle 91 discharge roller pair 100 copier

JP 2002-171047 A

Claims (6)

In the flat cable guide member that is provided in the structure and guides in the same direction while holding a plurality of flat cables stacked,
A flat cable guide member having a partition member for partitioning a flat cable so that a space is formed between the flat cables. In the flat cable guide member of Claim 1,
A flat cable guide member, wherein the partition member is formed integrally with a flat cable guide member main body. In the flat cable guide member of Claim 1 or 2,
A flat cable guide member configured to pass a flat cable having a high frequency among a plurality of flat cables in the vicinity of a portion made of sheet metal of the structure. In the flat cable guide member of Claim 1, 2, or 3,
A flat cable guide member, wherein the partition members are alternately provided in a flat cable width direction which is a direction orthogonal to the longitudinal direction over the flat cable longitudinal direction. In the flat cable guide member according to claim 1, 2, 3, or 4,
A flat cable guide member that holds the flat cable so that the flat cable is positioned between the structure and the flat cable guide member. Image forming means for forming an image on a recording medium;
A flat cable for electrically connecting a plurality of electrical components provided in the image forming means;
In an image forming apparatus provided with a flat cable guide means provided in the apparatus structure and guiding in the same direction while holding a plurality of the flat cables stacked on each other,
An image forming apparatus using the flat cable guide member according to claim 1, 2, 3, 4 or 5 as the flat cable guide means.

Images