JP4710620B2 - Harness cover and image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus, and more particularly to improvement of a signal line wiring technique.

  Conventionally, when arranging each harness in the same groove, a technique for arranging a spacer member between a harness for connecting a document feed motor, which is likely to generate electromagnetic noise, and a harness for connecting an image reading sensor is known. (For example, Patent Document 1).

  In addition, a technique for hooking a harness without using a dedicated latching part to prevent disconnection and improve workability has been conventionally known (for example, Patent Document 2).

JP-A-10-150515 JP 2003-204409 A

  However, when the groove part of patent document 1 and the harness receiving part of patent document 2 are formed of a metal member, the harness may be unable to transmit a signal satisfactorily due to the influence of electrostatic noise transmitted through the metal member. Arise. As a result, there also arises a problem that the image forming apparatus does not operate correctly.

  Therefore, an object of the present invention is to provide a harness cover and an image forming apparatus that can reduce the influence of electrical noise.

  In order to solve the above-mentioned problem, the invention of claim 1 is characterized in that a storage portion surrounded by a conductive member and having a storage space extending in one direction, fixed to the storage space side of the storage portion, and extending in the one direction. The bag-shaped member is formed of an insulating resin, and the plurality of signal lines are inserted inside the bag-shaped member.

  Moreover, invention of Claim 2 is the harness cover of Claim 1, The said bag-shaped member has two sheet | seat materials, The said sheet | seat material is the some provided along the said one direction. Each of the plurality of protrusions is inserted into a corresponding hole of the holes provided in the inner wall facing the storage space, and has a protrusion on the storage space side of the storage. The plurality of signal lines are fixed, and are inserted into a space sandwiched between the two sheet members.

  The invention of claim 3 is a plate material, a first conductive member having a groove portion extending in one direction, and a plate material, and a second member attached to the first conductive member so as to close the opening of the groove portion. A conductive member and a bag-like member fixed to the groove and extending in the one direction, wherein the bag-like member is formed of an insulating resin, and a plurality of signal lines are the bag-like member. It is characterized by being inserted and wired inside.

  According to a fourth aspect of the present invention, in the harness cover according to the third aspect, the bag-shaped member includes two sheet materials, and the sheet material includes a plurality of sheets provided along the one direction. Each of the plurality of protrusions is fixed to the groove portion by being inserted into a corresponding hole portion among the hole portions provided on the inner wall of the groove portion, and the plurality of signal lines are The wiring is provided in a space between the two sheet materials.

  According to a fifth aspect of the present invention, an image forming unit that is provided on the main body and records a toner image based on the electrostatic latent image on a recording paper, and is rotatable with respect to the main body above the main body. An image input unit that reads image data from a document, a control unit that is provided in the main body and controls operations of the image forming unit and the image input unit, and 1 to 4. The harness cover is provided on the image input unit side, and the plurality of signal lines electrically connect the image input unit and the control unit. It is characterized by doing.

  According to a sixth aspect of the present invention, in the image forming apparatus according to the fifth aspect of the present invention, an operation unit that enables input from a user is provided on a front side portion of the image input unit. The rotation axis of the input unit is substantially parallel to the front-rear direction, the control unit is provided on the rear side when viewed from the image forming unit, and the harness cover has the one direction substantially parallel to the front-rear direction. And at the lower surface of the image input unit so as to be in the vicinity of the rotation axis, and the plurality of signal lines electrically connect at least the operation unit and the control unit. It is characterized by.

  According to the first, second, fifth, and sixth aspects of the invention, the bag-like member formed of the insulating resin is fixed in the storage space surrounded by the conductive member. A plurality of signal lines can be inserted inside the bag-shaped member.

  According to the invention described in claim 3 to claim 6, the bag-like member formed of insulating resin is fixed to the groove portion of the first conductive member, and a plurality of signals are provided inside the bag-like member. A line can be inserted.

  Thereby, for example, electrostatic noise transmitted through the conductive member is blocked by the bag-shaped member. Therefore, the plurality of signal lines wired to the harness cover are not affected by electrostatic noise and can transmit signals satisfactorily.

  In particular, according to the invention described in claim 5, the plurality of signal lines are wired to the harness cover according to any one of claims 1 to 4. Therefore, for example, even when electrostatic noise generated in the image input unit or the image forming unit is transmitted to the conductive material, the influence of the electrostatic noise can be reduced by the bag-like member. Therefore, it is possible to satisfactorily transmit electric signals through the plurality of signal lines, and it is possible to favorably control the operation of the image forming apparatus 1.

  In particular, according to the invention described in claim 6, it is possible to wire a plurality of signal lines near the rotation shaft, and to set the length of each signal line to be short. Therefore, the influence of electrostatic noise can be further reduced.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<1. Configuration of image forming apparatus>
FIG. 1 is a perspective view showing an example of the overall configuration of an image forming apparatus 1 according to an embodiment of the present invention. FIG. 2 is a perspective view showing an example of a state in which the image input unit 20 is opened. FIG. 3 is a perspective view illustrating an example of the configuration of the frame 69 provided in the image input unit 20. In FIG. 1 and the subsequent drawings, coordinate axes indicating the vertical direction, the front-rear direction, and the left-right direction are attached to clarify the directional relationship.

  The image forming apparatus 1 is a scanner, a printer, a copier, a facsimile, or a complex machine that combines these functions. As shown in FIGS. 1 and 2, the image forming apparatus 1 mainly includes a document pressing unit 10, an image input unit 20, a recording unit 30, a paper feeding unit 40, an operation panel 50, and a control unit 90. Among these, the recording unit 30, the paper feeding unit 40, and the control unit 90 are provided in the main body unit 5 of the image forming apparatus 1. Further, as shown in FIG. 2, the recording unit 30 and the control unit 90 are provided in the unit chambers 6 a and 6 b of the main body unit 5, respectively.

  The document pressing unit 10 is provided above the image input unit 20 and mainly includes a document conveying unit 11 and pressing members 12 and 13 as shown in FIG. Here, as shown in FIG. 1, the upper surface of the attachment portion 15 provided adjacent to the image input portion 20 and the lower surface of the document pressing portion 10 include a plurality of (two in this embodiment) hinges 16. Are connected by Accordingly, the document pressing unit 10 is provided so as to be able to open and close with respect to the image input unit 20 by rotating about a rotation shaft 16a substantially parallel to the left-right direction.

  As shown in FIG. 1, the document transport unit 11 is provided on the left upper side of the document pressing unit 10 and immediately above the document glass 22. The document transport unit 11 can cause the image input unit 20 to read reflected light reflected on the front surface or the back surface of the document by an automatic document feeder (ADF) method.

  The pressing member 12 is a plate-like member that regulates the distance between the document and the document glass 22 in a state where the document pressing unit 10 is closed. The pressing member 12 is urged downward (in the direction toward the pressing member 12 when viewed from the document conveying section 11) by an elastic member (not shown) such as a coil spring or a leaf spring. As a result, the pressing member 12 can favorably convey the document between the pressing member 12 and the document glass 22, and the image data can be satisfactorily read by the automatic paper feeding method.

  The pressing member 13 is a member that presses the document placed on the document glass 23 in a state where the document pressing unit 10 is closed. Accordingly, the pressing member 13 can satisfactorily adhere the original to the original glass 23, and can satisfactorily read the image data by the flat bed method.

  The image input unit 20 is a scanner unit that reads image data from a document by a flatbed method or an ADF method. As shown in FIG. 1, the image input unit 20 includes a lid 21a and a housing 21b. The lid 21a and the casing 21b are box bodies having a substantially rectangular cross section, and an internal space 25 is formed inside the image input unit 20.

  Here, as shown in FIG. 2, a hinge 36 formed of a conductive member is attached between the image input unit 20 and the main body unit 5. That is, the lower mounting plate 36a of the hinge 36 is mounted on the left side of the upper surface of the main body 5 and the upper mounting plate 36b (second conductive member) is mounted on the support member 63 of the frame 69, respectively. The part 20 and the main body part 5 are connected by a hinge 36. Therefore, the image input unit 20 rotates about a rotation shaft 36 c substantially parallel to the front-rear direction and is provided so as to be openable and closable with respect to the main body unit 5.

  As shown in FIG. 1, the lid portion 21a is provided with plate-like original glasses 22 and 23. The original glass 22 transmits light reflected by the original conveyed by the original conveying unit 11. The original glass 23 transmits light reflected by the original placed thereon.

  On the other hand, the outer frame of the casing 21b is formed of a flame retardant resin and is reinforced by a frame body 69 (see FIG. 3) formed of a conductive member. As shown in FIG. 1, the housing 21 b is mainly provided with carriages 26 a and 26 b, a light receiving unit 27, and an inverter 28.

  Here, as shown in FIG. 3, the frame 69 mainly includes support members 61 and 63 and two sliding members 62, and the support members 61 and 63 are arranged substantially in parallel. The two sliding members 62 are welded. Each of the members 61 to 63 is formed by bending a conductive member, for example, a metal plate such as a sheet metal.

  FIG. 3 illustrates the posture of the frame 69 when the image input unit 20 is opened. Therefore, the extending direction (longitudinal direction) of the sliding member 62 shown in FIG. 3 is substantially the same as the up-and-down direction, and the extending direction (longitudinal direction) of the support members 61 and 63 is substantially the same as the front-rear direction.

  As shown in FIGS. 2 and 3, the support member 61 is a substantially rectangular flat plate member, and is fixed to each sliding member 62 in a substantially orthogonal posture. The support member 61 is exposed to the internal space 25 through a through hole (not shown) formed in the bottom of the housing 21b (a portion adjacent to the main body 5 when the image input unit 20 is closed).

  As shown in FIGS. 2 and 3, each of the two sliding members 62 is a member having a substantially U-shaped cross section in the width direction (the front-rear direction when the image input unit 20 is closed). Each sliding member 62 is fitted and inserted from the main body 5 side through a through hole (not shown) formed in the bottom of the housing 21b.

  As shown in FIGS. 2 and 3, the support member 63 mainly includes a groove 63a (first conductive member) extending in one direction (front-rear direction) and a direction substantially perpendicular to the front-rear direction (FIGS. 2 and 3). Then, a flat surface portion 63b extending from the vicinity of the opening side end portion of the groove portion 63a is provided in a substantially vertical direction). Further, as shown in FIG. 3, a plurality of holes 66 are provided in both inner walls 63c of the groove 63a along the front-rear direction.

  Each of the carriages 26a and 26b has a mirror (not shown) that reflects light from the document, and the light source (not shown) that illuminates the document is provided on the carriage 26a on the light receiving unit 27 side (right side). It has been.

  Each of the carriages 26a and 26b can slide on the sliding surface 62a of each sliding member 62. Here, each sliding member 62 is formed of a material having a smaller coefficient of thermal expansion than a resin, such as a metal. Therefore, the carriages 26a and 26b can be reciprocated with high accuracy regardless of the temperature change of the internal space 25, and the image data can be obtained from the document satisfactorily.

  The carriages 26a and 26b move in the left-right direction so that the distance from the document to the light receiving unit 27 is constant. That is, the optical path length of the reflected light that is reflected by the original, passes through the original glass 22 or the original glass 23, is reflected by the carriages 26a and 26b, and reaches the light receiving unit 27 is substantially the same regardless of the reflection position on the original. Become. Therefore, the light receiving unit 27 fixed to the housing 21b can acquire the image data of the document satisfactorily.

  The light receiving unit 27 and the inverter 28 (see FIG. 2) are fixed to the surface of the support member 61 that is exposed from the bottom of the housing 21b to the internal space 25 side. The light receiving unit 27 collects the reflected light 29 from the original by the lens 27a and forms an image on a CCD (line sensor) 27b. Thereby, the reflected light from the document is converted into an electric signal by photoelectric conversion. Further, the inverter 28 performs light emission control of the light source irradiated on the document.

  As shown in FIG. 2, the recording unit 30 is provided in the unit chamber 6a on the operation panel 50 side of the main body unit 5, and records a toner image based on the electrostatic latent image on a recording sheet by an electrophotographic method. . That is, the recording unit 30 forms an electrostatic latent image based on the image data read by the image input unit 20, visualizes the electrostatic latent image with toner, and transfers the visualized toner image to recording paper. The image forming unit.

  The paper feed unit 40 is disposed below the unit chambers 6 a and 6 b and supplies recording paper to the recording unit 30. Here, the paper feed unit 40 has one or a plurality of paper feed cassettes, and recording paper of a type corresponding to the number of cassettes is supplied from the paper feed unit 40 to the recording unit 30.

  The operation panel 50 is provided on the front side of the image input unit 20 and is used as an interface for a user of the image forming apparatus 1 (hereinafter simply referred to as “user”). As shown in FIG. 1, the operation panel 50 mainly includes a display unit 51 and an operation unit 52.

  The display unit 51 is configured by a so-called liquid crystal display, and has a function as a “touch panel” that can designate a position on the screen by touching the screen with a finger or a dedicated pen. Accordingly, the user can cause the image forming apparatus 1 to execute a predetermined operation by giving an instruction using the “touch panel” function of the display unit 51 based on the content displayed on the display unit 51. . Thus, the display unit 51 is also used as an input unit that enables data input to the image forming apparatus 1.

  The operation unit 52 is an input unit having a plurality of operation keys 53. The user can cause the image forming apparatus 1 to perform a predetermined operation by performing an input operation based on the display content of the display unit 51.

  As shown in FIG. 2, the control unit 90 is provided in the unit chamber 6 b on the back side (rear side) when viewed from the operation panel 50 with respect to the main body unit 5. The control unit 90 is electrically connected to the document conveying unit 11, the image input unit 20, the recording unit 30, the paper feeding unit 40, and the operation panel 50 through a plurality of signal lines. Therefore, the control unit 90 can control the operations of the document conveying unit 11, the image input unit 20, the recording unit 30, and the paper feeding unit 40 at a predetermined timing.

  In the present embodiment, the plurality of signal lines 67 connecting the operation panel 50 and the control unit 90 pass through the storage space 64 surrounded by the groove 63a of the support member 63 and the upper mounting plate 36b of the hinge 36. Wired.

<2. Configuration near the harness cover>
FIG. 4 is a diagram for explaining a wiring state of signal lines. FIG. 5 is a diagram for explaining an example of the configuration of the sheet material 65a. Here, the harness cover 60 formed in the vicinity of the groove 63a of the support member 63 will be described.

  As shown in FIGS. 2 and 4, the harness cover 60 is provided on the lower surface (that is, the image input unit 20 side) of the image input unit 20. The harness cover 60 is mainly wired with a plurality of signal lines 67 that connect the control unit 90 side from the operation panel 50 side. As shown in FIGS. 2 and 4, the harness cover 60 mainly includes a groove 63 a of the support member 63, an upper mounting plate 36 b of the hinge 36, and two sheet members 65 a.

  Here, as shown in FIG. 4, the upper attachment plate 36b of the hinge 36 is attached to the flat surface portion 63b of the support member 63 so as to close the opening of the groove portion 63a. Accordingly, a storage space 64 that is surrounded by the conductive member and extends in one direction (front-rear direction) is formed in the vicinity of the groove 63a. And the groove part 63a and the upper side attachment plate 36b are used as the accommodating part 68 which accommodates a some wiring.

  The bag-like member 65 has a plurality (two in the present embodiment) of sheet materials 65a formed of an insulating resin. Each of the plurality of sheet materials 65a protrudes from a substantially rectangular base 65b, and has a plurality of protrusions 65c provided along the front-rear direction. That is, as shown in FIG. 5, the protrusion 65 c protrudes outward from both ends of the base 65 b in the width direction (a direction substantially perpendicular to the front-rear direction).

  Here, as shown in FIG. 3, the inner walls 63c of the groove 63a (that is, the inner walls 63c of the storage portion 68 facing the storage space 64) are provided with a plurality of holes 66 along the front-rear direction. Yes. Therefore, each protrusion 65c of the sheet material 65a is inserted into the corresponding hole 66, whereby each sheet material 65a is fixed to the groove 63a (that is, the storage space 64 side of the storage portion 68) (see FIG. 4). ).

  Thus, the bag-like member 65 is fixed to the groove 63a and extends in the front-rear direction (one direction). Further, both end portions in the front-rear direction of the bag-like member 65 are opened, and the plurality of signal lines 67 are inserted from both openings into the inside of the bag-like member 65 (that is, a space sandwiched between the plurality of sheet members 65a), and the wiring Is done.

  Thereby, for example, electrostatic noise generated in the image input unit 20 and the recording unit 30 and transmitted through the conductive member such as the support member 63 and the hinge 36 is blocked by the bag-like member 65 formed of insulating resin. Therefore, the plurality of signal lines 67 wired to the harness cover 60 are not affected by electrostatic noise and can transmit signals satisfactorily, and the control unit 90 can control the document conveying unit 11, the image input unit 20, The operations of the recording unit 30, the paper feed unit 40, and the like can be favorably controlled.

  Further, when attaching the upper mounting plate 36b of the hinge 36 to the flat portion 63b of the support member 63, a person who assembles the image forming apparatus 1 or a person who performs maintenance of the image forming apparatus 1 (hereinafter simply referred to as “operator”). Can be operated in a state where a plurality of signal lines 67 are bundled by the bag-like member 65 and fixed to the image input unit 20 above the main body unit 5. Therefore, the operator can perform the work of attaching the hinge 36 to the image input unit 20 without lifting the plurality of signal lines 67 upward, and the man-hours required for the attachment work can be reduced.

  Furthermore, the harness cover 60 is provided in the vicinity of the rotation shaft 36c of the hinge 36, and a plurality of signal lines 67 can be wired in the vicinity of the rotation shaft 36c. Therefore, the length of each signal line connecting the operation panel 50 provided on the front side and the control unit 90 provided on the back side can be set short. As a result, the influence of electrostatic noise can be further reduced.

<3. Advantages of harness cover and image forming apparatus of this embodiment>
As described above, the harness cover 60 of the present embodiment is fixed to the storage space 64 surrounded by the conductive member and has the bag-like member 65 formed of insulating resin, and each signal line 67 is The bag-like member 65 is inserted inside. Thereby, even if electrostatic noise is transmitted through the support member 63 and the hinge 36, the electrostatic noise can be blocked by the bag-like member 65. Therefore, the signal line 67 wired to the harness cover 60 is not affected by electrostatic noise and can transmit a signal satisfactorily.

<4. Modification>
Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made.

  In the present embodiment, the bag-like member 65 has been described as having two sheet members 65a, but is not limited thereto. For example, three or more sheet members 65a may be used, and a plurality of signal lines 67 may be inserted into a space sandwiched between the sheet members 65a. Thereby, electrostatic noise can be further blocked and signals on each signal line 67 can be transmitted satisfactorily.

1 is a perspective view showing an example of the overall configuration of an image forming apparatus in the present embodiment. It is a perspective view which shows an example of the state which open | released the image input part. It is a perspective view which shows an example of a structure of a frame. It is a figure for demonstrating the wiring condition of a signal line. It is sectional drawing for demonstrating an example of a structure of a sheet | seat material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image forming apparatus 5 Main body 6a, 6b Unit chamber 10 Document pressing part 16, 36 Hinge 16a, 36c Rotating shaft 20 Image input part 30 Recording part 36a Lower side mounting plate 36b Upper side mounting plate 40 Paper feeding part 50 Operation panel 60 Harness cover 61, 63 Support member 62 Slide member 63a Groove portion 64 Storage space 65 Bag-like member 65a Sheet material 65b Base portion 65c Projection portion 66 Hole portion 67 Signal line 68 Storage portion 69 Frame body

Claims (6)

(a) a storage portion surrounded by a conductive member and having a storage space extending in one direction;
(b) a bag-like member fixed to the storage space side of the storage unit and extending in the one direction;
With
The bag-like member is formed of an insulating resin,
The harness cover, wherein the plurality of signal lines are inserted inside the bag-shaped member. The harness cover according to claim 1,
The bag-like member has two sheet materials,
The sheet material has a plurality of protrusions provided along the one direction, and each of the plurality of protrusions corresponds to a hole portion provided in an inner wall facing the storage space. Is fixed to the storage space side of the storage portion,
The harness cover, wherein the plurality of signal lines are inserted into a space sandwiched between the two sheet members. (a) a first conductive member which is a plate material and has a groove extending in one direction;
(b) a second conductive member that is a plate material and is attached to the first conductive member so as to close the opening of the groove portion;
(c) a bag-like member fixed to the groove and extending in the one direction;
With
The bag-like member is formed of an insulating resin,
The harness cover, wherein the plurality of signal lines are inserted and wired inside the bag-like member. In the harness cover according to claim 3,
The bag-like member has two sheet materials,
The sheet material has a plurality of protrusions provided along the one direction, and each of the plurality of protrusions is inserted into a corresponding hole of the holes provided in the inner wall of the groove. Is fixed to the groove,
The harness cover, wherein the plurality of signal lines are wired in a space between the two sheets. An image forming unit that is provided in the main body and records a toner image based on the electrostatic latent image on a recording sheet;
An image input unit provided above the main body so as to be rotatable with respect to the main body, and for reading image data from a document;
A control unit that is provided in the main body and controls operations of the image forming unit and the image input unit;
A harness cover according to any one of claims 1 to 4,
With
The harness cover is provided on the image input unit side,
The plurality of signal lines electrically connect the image input unit and the control unit. The image forming apparatus according to claim 5.
On the front side of the image input unit, an operation unit that enables input from a user is provided,
The rotation axis of the image input unit is substantially parallel to the front-rear direction,
The control unit is provided on the rear side as viewed from the image forming unit,
The harness cover is provided on the lower surface of the image input unit such that the one direction is substantially parallel to the front-rear direction and is near the rotation axis.
The image forming apparatus, wherein the plurality of signal lines electrically connect at least the operation unit and the control unit.

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