JP2011007891A - Image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming apparatus preventing damage to a harness when a moving body is displaced and to obtain downsizing of the apparatus body.SOLUTION: The image forming apparatus (multifunctional machine 1) includes: an image forming part for forming an image; an apparatus body 2 for storing the image forming part; the moving body (document conveying device 90) arranged so as to be displaced relatively to the apparatus body 2; and the harness 110 that electrically connects the apparatus body 2 with the moving body and has a bending part 113 formed therein, which absorbs the displacement of the moving body. In addition, the bending part 113 is arranged in the moving body.

Description

  The present invention relates to an image forming apparatus including a harness that connects an apparatus main body and a movable body (such as a document reading unit) that can move with respect to the apparatus main body.

  2. Description of the Related Art Conventionally, there has been known an image forming apparatus including an apparatus main body that houses an image forming unit that forms an image on a sheet, and an original reading device that is swingably provided on the upper side of the apparatus main body and reads an image formed on an original. (See Patent Document 1). Specifically, in this technique, an image read by the document reading device is output to a control board in the device main body, or power is supplied from the device main body to a motor or the like in the document reading device. The device is connected with a harness.

  In this technique, a part of the harness is bent into a U shape, and the bent portion of the U shape is disposed in the apparatus main body (specifically, near the swinging shaft of the document reading apparatus). When it is swung away from the apparatus main body, the U-shaped bent portion opens in an L shape to prevent the harness from being damaged by preventing excessive tension from being applied to the harness.

JP 2009-58947 A

  By the way, in general, there is a multi-function peripheral in which an original reading device is attached to an apparatus main body, which is sold as an apparatus main body alone without providing an original reading device depending on the type of model. When only the device main body is used as a printer, it is often used personally in a narrow space such as a room at home. Therefore, the control body is arranged closely in the device main body. It is necessary to reduce the size. However, since the U-shaped bent portion of the harness is arranged in the apparatus main body in the structure of the prior art, the control board is placed in another space so that the bent portion and the control board do not interfere with each other. There was a problem that it was difficult to reduce the size of the device because it had to be closely packed. Such a problem may occur not only in a configuration in which the document reading device is swingably disposed in the apparatus main body, but also in an image forming apparatus in which a movable body is movably attached to the apparatus main body. .

  SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming apparatus capable of preventing a harness from being damaged due to displacement of a moving body such as a document reading apparatus and reducing the size of the apparatus main body.

  In order to solve the above-described problems, an image forming apparatus according to the present invention includes an image forming unit that forms an image, an apparatus main body that houses the image forming unit, and a movement that is disposed so as to be relatively displaceable with respect to the apparatus main body. A body, a harness that electrically connects the apparatus main body and the moving body, and is formed with a bent portion for absorbing displacement of the moving body, and the bent portion is disposed on the moving body. It is characterized by.

  According to the present invention, since the displacement of the moving body is absorbed by the bent portion of the harness, the harness can be prevented from being damaged. Further, by arranging the bent portion of the harness on the moving body, it is not necessary to provide a space for accommodating the bent portion of the harness in the apparatus main body, and thus the apparatus main body can be reduced in size.

  ADVANTAGE OF THE INVENTION According to this invention, while damaging the harness accompanying the displacement of a moving body can be prevented, size reduction of an apparatus main body can be achieved.

It is explanatory drawing which shows the multifunctional device which concerns on one Embodiment of this invention. (A)-(c) is explanatory drawing which shows the displacement state of the original conveying apparatus with respect to a flat bed scanner. An explanatory view (a) showing the structure around the bent portion of the harness when the document conveying device is placed on the flatbed scanner, and the structure around the bent portion of the harness when the document conveying device is moved upward It is explanatory drawing (b) which shows this.

  Next, an MFP 1 as an example of an image forming apparatus according to an embodiment of the present disclosure will be described in detail with reference to the drawings as appropriate. In the following explanation, explanation will be given in the direction based on the user when using the multifunction machine. That is, in FIG. 1, the right side is “front side (front side)”, the left side is “rear side (back side)”, the back side in the vertical direction of the paper is “right side”, and the front side of the vertical direction of the paper is “left side”. " In addition, the vertical direction toward the page is defined as the “vertical direction”.

  As shown in FIG. 1, the multifunction machine 1 includes an apparatus main body 2 that functions as a printer, and a document reading apparatus 100.

  The apparatus main body 2 includes a feeder unit 3 for feeding paper P, an image forming unit 4 for forming an image on the paper P, and the like.

  The feeder unit 3 mainly includes a paper feed tray 31 that is detachably attached to the bottom of the apparatus main body 2 and a paper transport mechanism 32 that transports the paper P. In the feeder unit 3, the paper P in the paper feed tray 31 is conveyed one by one to the image forming unit 4 by the paper conveyance mechanism 32.

  The image forming unit 4 is accommodated in the apparatus main body 2 and mainly includes a scanner unit 5, a process cartridge 6, a fixing device 7, and the like.

  The scanner unit 5 is provided in an upper part in the apparatus main body 2 and includes a laser light emitting unit, a polygon mirror, a lens, a reflecting mirror, and the like (not shown). In the scanner unit 5, a laser beam is irradiated on the surface of the photosensitive drum 65 by high-speed scanning.

  The process cartridge 6 can be attached to and detached from the apparatus main body 2 by appropriately opening a front cover 2A provided on the front side of the apparatus main body 2. In the process cartridge 6, a developing roller 61, a layer thickness regulating blade 62, a supply roller 63, a toner storage chamber 64, an agitator 64A, a photosensitive drum 65, a scorotron charger 66, and a transfer roller 67 are mainly provided. ing.

  In the process cartridge 6, the toner in the toner storage chamber 64 is stirred by the agitator 64 </ b> A and then supplied to the developing roller 61 by the supply roller 63. At this time, between the supply roller 63 and the developing roller 61. Positively triboelectrically charged. The toner supplied onto the developing roller 61 enters between the layer thickness regulating blade 62 and the developing roller 61 as the developing roller 61 rotates, and is further developed as a thin layer having a constant thickness while being frictionally charged. It is carried on a roller 61.

  On the other hand, the surface of the rotating photosensitive drum 65 is uniformly positively charged by the scorotron charger 66 and then exposed by high-speed scanning of the laser beam from the scanner unit 5. Thereby, the potential of the exposed part is lowered, and an electrostatic latent image based on the image data is formed.

  Next, the toner carried on the developing roller 61 is supplied to the electrostatic latent image formed on the surface of the photosensitive drum 65 by the rotation of the developing roller 61, and the toner image is formed on the surface of the photosensitive drum 65. It is formed. Thereafter, the paper P is transported between the photosensitive drum 65 and the transfer roller 67, whereby the toner image carried on the surface of the photosensitive drum 65 is transferred onto the paper P.

  The fixing device 7 includes a heating roller 71 and a pressure roller 72 that is disposed to face the heating roller 71 and pressurizes the heating roller 71. In the fixing device 7 configured as described above, the toner transferred onto the paper P is thermally fixed while the paper P passes between the heating roller 71 and the pressure roller 72. The paper P thermally fixed by the fixing device 7 is conveyed to a paper discharge roller R disposed on the downstream side of the fixing device 7, and is sent out from the paper discharge roller R onto the paper discharge tray 21.

  Here, the paper discharge tray 21 is formed so as to open forward while being recessed one step from the upper surface 2B of the apparatus body 2. An original reading apparatus 100 can be selectively mounted on the upper surface 2B of the apparatus body 2 as an option.

<Document reader>
The document reading apparatus 100 is fixed to the upper surface 2B so as to protrude forward from the uppermost part (upper surface 2B) on the rear side of the apparatus main body 2, and includes a flat bed scanner 80 as an example of the document reading unit, and a movable body. And an original document conveying device 90 as an example.

  The flatbed scanner 80 mainly includes a platen glass 81 serving as a document table on which a document is placed (placed), and an image sensor 82. In the flat bed scanner 80, an image sensor 82 moving back and forth can read a document stationary on the platen glass 81 while scanning. Further, in the flat bed scanner 80, the document M conveyed by the document conveying device 90 can be read by the image sensor 82.

  The document transport device 90 is a device that transports the document M so as to pass through the image sensor 82 in the standby position, and causes the image sensor 82 to read the document M while transporting the document M. The flatbed scanner 80 (device main body 2). Is movable (relatively displaceable). Specifically, a rotation shaft 91 is provided at the lower rear side of the document conveying device 90, and the rotation shaft 91 is rotated by a long hole 83 </ b> A of a bearing portion 83 provided at the upper rear side of the flat bed scanner 80. It is supported so that it can move and move up and down.

  As a result, as shown in FIG. 2A, when the document conveying device 90 is simply rotated, the upper surface of the flat bed scanner 80 is opened, and the document can be placed on the platen glass 81. . Further, as shown in FIG. 2B, when the document conveying device 90 is rotated and lifted upward, a gap between the document conveying device 90 and the flat bed scanner 80 becomes large.

  Therefore, as shown in FIG. 2C, even when the book B is opened and placed on the platen glass 81, the entire book B can be pressed from the upper side by the document conveying device 90 and can be read satisfactorily. It is possible.

  As shown in FIG. 3A, the movable document conveying device 90 and the immovable device main body 2 are electrically connected by a harness 110. Specifically, the harness 110 electrically connects a motor 92 for driving a conveyance roller or the like in the document conveyance device 90 and a control board 22 in the apparatus main body 2 that sends a control signal to the motor 92. Yes. More specifically, one end 111 of the harness 110 is connected to the connection terminal 92A of the motor 92 as an example of the first connection part, and the other end 112 is a connection terminal of the control board 22 as an example of the second connection part. 22A.

  The harness 110 is formed with a U-shaped bent portion 113 for absorbing the displacement of the document conveying device 90. The bent portion 113 is arranged in the document conveying device 90 and the sag is absorbed by the sag absorbing mechanism 93 in the document conveying device 90. The slack absorbing mechanism 93 includes a pulley 93A around which the bent portion 113 is hung, and a coil spring 93B as an example of a biasing member that biases the pulley 93A.

  Specifically, the coil spring 93B supports the pulley 93A so as to suspend the pulley 93A. When the document conveying device 90 is closed as shown in FIG. 3A, the coil spring 93B applies an upward biasing force to the pulley 93A. In addition, an appropriate tension is applied to the harness 110 to prevent it from sagging. Further, as shown in FIG. 3B, when the document conveying device 90 is moved upward, the position of the pulley 93A with respect to the device main body 2 is hardly changed due to the extension of the coil spring 93B. Too much tension is prevented.

  In addition, the document conveying device 90 is provided with a guide pulley 94 for changing the orientation of the harness 110 and a first fixing portion 95 for fixing the harness 110 to the document conveying device 90. The first fixing portion 95 fixes a portion between the one end 111 of the harness 110 and the bent portion 113 to the document conveying device 90. As a result, the influence of the tension applied to the vicinity of the bent portion 113 of the harness 110 when moving the document conveying device 90 does not affect the connection terminal 92A of the motor 92, so that the connection between the connection terminal 92A and the harness 110 is reliably maintained. It is possible.

  Further, the flat bed scanner 80 is provided with a second fixing portion 84 for fixing a portion between the other end 112 of the harness 110 and the bent portion 113 to the flat bed scanner 80 (a member fixed to the apparatus main body 2). ing. Thereby, when the document conveying device 90 is moved, the influence of the tension applied to the vicinity of the bent portion 113 of the harness 110 does not reach the connection terminal 22A of the control board 22, so that the connection between the connection terminal 22A and the harness 110 is reliably maintained. It is possible to do.

According to the above, the following effects can be obtained in the present embodiment.
By arranging the bent portion 113 of the harness 110 in the document conveying device 90, it is not necessary to provide a space for accommodating the bent portion of the harness in the apparatus main body where the control board and the like are densely packed. can do. By downsizing the apparatus main body 2 in this way, when only the apparatus main body 2 is sold as a printer separately from the document reading apparatus 100, it can be provided to the user as a small printer.

  Since the slack absorbing mechanism 93 that absorbs the slack of the bent portion 113 of the harness 110 is provided, the bent portion 113 interferes with other parts by the slack of the bent portion 113 as compared with the structure in which the bent portion 113 is simply arranged in the space, and the harness 110 It is possible to suppress disconnection.

  Since the tension can always be applied to the bent portion 113 by the coil spring 93B of the sag absorbing mechanism 93, it is possible to prevent any part of the harness 110 from sagging and interfering with other parts. Further, in the structure that absorbs the displacement by bending the bent portion from the U shape to the L shape as in the prior art, the bent portion may be fatigued and disconnected, but the pulley 93A and the like as in the present embodiment In the structure using the coil spring 93 </ b> B, the bending portion 113 can be prevented from fatigue (sagging) because it is simply moved linearly without changing the shape of the U-shaped bending portion 113.

  Since the portion between one end 111 of the harness 110 and the bent portion 113 is fixed to the document conveying device 90 by the first fixing portion 95, the tension applied to the vicinity of the bent portion 113 of the harness 110 when the document conveying device 90 is moved. It is possible to suppress the influence on the connection terminal 92 </ b> A of the motor 92.

  Since the portion between the other end 112 of the harness 110 and the bent portion 113 is fixed to the flat bed scanner 80 by the second fixing portion 84, the tension applied to the vicinity of the bent portion 113 of the harness 110 when the document conveying device 90 is moved. Can be prevented from affecting the connection terminal 22 </ b> A of the control board 22.

In addition, this invention is not limited to the said embodiment, It can utilize with various forms so that it may illustrate below.
In the above embodiment, the document conveying device 90 that is displaced with respect to the flat bed scanner 80 is used as the moving body, but the present invention is not limited to this. For example, when the flat bed scanner 80 can be rotated with respect to the apparatus main body 2 so that the paper P discharged to the paper discharge tray 21 can be easily picked up by hand, the harness is connected to the flat bed scanner 80 which is a moving body. 110 bent portions 113 may be provided.

  In the above embodiment, a mechanism having a pulley 93A and a coil spring 93B is adopted as a sag absorbing mechanism. However, the present invention is not limited to this, and a mechanism having a reel for winding a harness, for example, may be adopted. Further, the urging member is not limited to the coil spring 93B, and may be a torsion spring or a leaf spring.

In the above embodiment, the harness 110 is fixed to the flat bed scanner 80, but the present invention is not limited to this, and the harness 110 may be fixed to the apparatus main body 2.
In the embodiment, the image forming unit using a laser is employed, but the present invention is not limited to this, and for example, an image using an LED may be employed.

In the above-described embodiment, the present invention is applied to the multifunction machine 1 including the document reading apparatus 100. However, the present invention is not limited to this, and other image forming apparatuses such as a multifunction machine having only a copying machine or a flatbed scanner. The present invention may be applied to.
In the above-described embodiment, the present invention is applied to a multi-function peripheral in which the document conveyance direction of the document conveyance device 90 and the discharge direction to the discharge tray 21 of the apparatus body 2 are substantially parallel (substantially front-rear direction). The present invention can also be applied to a configuration in which the document reading device is arranged so that the document conveyance direction and the paper discharge direction are orthogonal to the left and right front and rear. In this case, the rotation shaft with respect to the apparatus main body of the document reading apparatus can be appropriately arranged at the left and right ends and the rear end of the apparatus main body. Providing the absorption mechanism is preferable because the length of the harness can be minimized.

DESCRIPTION OF SYMBOLS 1 Multifunctional device 2 Apparatus main body 4 Image formation part 22 Control board 22A Connection terminal 80 Flatbed scanner 83 Bearing part 83A Long hole 84 2nd fixing | fixed part 90 Document conveying apparatus 91 Rotating shaft 92 Motor 92A Connection terminal 93 Slack absorption mechanism 93A Pulley 93B Coil spring 95 First fixed portion 100 Document reading device 110 Harness 111 One end 112 The other end 113 Bent portion

Claims (6)

An image forming unit for forming an image;
An apparatus main body for accommodating an image forming unit;
A moving body arranged to be relatively displaceable with respect to the apparatus body;
The apparatus main body and the moving body are electrically connected, and a harness formed with a bent portion for absorbing the displacement of the moving body is provided.
An image forming apparatus, wherein the bent portion is arranged on the movable body.   The image forming apparatus according to claim 1, wherein the movable body is provided with a slack absorbing mechanism that absorbs slack of the bent portion. The sagging absorption mechanism is
A pulley around which the bent portion is wound,
The image forming apparatus according to claim 2, further comprising an urging member that urges the pulley. In the moving body,
A first connecting portion to which an end of the harness is connected;
The 1st fixing | fixed part which fixes the site | part between the edge part of the said harness and the said bending part to the said mobile body is provided, The any one of Claims 1-3 characterized by the above-mentioned. Image forming apparatus. In the device body,
A second connecting portion to which an end of the harness is connected;
The second fixing portion for fixing a portion between the end portion of the harness and the bent portion to the device main body or a member fixed to the device main body is provided. 5. The image forming apparatus according to any one of 4 above. An original reading unit capable of reading the placed original;
A document conveying device that is movably provided with respect to the document reading unit and that allows the document reading unit to read the document while conveying the document,
The image forming apparatus according to claim 1, wherein the moving body is the document conveying device.

Images