JP5078550B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus such as a copying machine, a facsimile machine, a printer, a plotter, etc., or a multifunction machine having a plurality of functions, and more particularly to the structure of the structure.

  In an image forming apparatus, a temperature rise due to various heat generation is a very important problem. In particular, the temperature increase aspect of an image forming unit that handles toner, a substrate having an electric element, and the like differs depending on the model and needs to be checked in detail.

  In some of the conventionally known image forming apparatuses, the space where the image forming unit and the substrate are arranged may be connected, and it is difficult to understand the flow of air in the image forming apparatus or in the housing, and each heat generation Influencing each other complicates the problem of temperature rise. As a result, it may be difficult to efficiently implement countermeasures against the temperature increase in the machine.

  In addition, in an image forming apparatus, a design that ensures sufficient user safety is an absolute requirement. In particular, when the user replaces parts, a partition etc. is provided in the machine so that the parts that become hot during operation and the parts where current flows are not touched, ensuring the safety of the user. doing.

JP 2003-324290 A JP 2002-240393 A JP 2002-34975 A

  Therefore, the present invention devised the arrangement of stays inside the device to isolate and simplify the problem of temperature rise by dividing the space and preventing heat exchange, and the space and danger that the user can touch during work. The present invention proposes an image forming apparatus that spatially separates various parts. In addition, the present invention proposes an image forming apparatus having a novel configuration for winding the harness, which is a problem because the space is physically separated.

An image forming apparatus according to a first aspect of the present invention includes a structural part such as a side plate that forms two opposing surfaces arranged perpendicular to the installation surface, and a replaceable part. Having a forming part,
The structure part, a partition plate arranged in parallel with the installation surface between the structure configured to include the structure part, and a substantially L-shape fixed to the structure and in contact with the partition plate The two surfaces of the stay and the five surfaces surrounded by them form a space separated from the image forming unit,
The partition plate and the stay are fixed by screw fastening, riveting, welding, etc.,
In an image forming apparatus in which a set of parts such as a substrate or the like that require energization or a bracket that holds the parts is arranged in a space separated from the image forming unit, and the arrangement is made by attaching to the stay.
A notch is provided on a side of the stay that contacts the side plate, and a harness that comes out of the board is provided through the notch, and a portion of the side plate that contacts the stay is in a direction opposite to the surface that contacts the stay. A concave portion is provided, and the harness from the substrate is routed between the concave portion and the stay .

According to a second aspect of the present invention, in the image forming apparatus of the first aspect , two or more harness paths are formed by the notch of the stay or the concave portion of the side plate or both. .

According to a third aspect of the present invention, in the image forming apparatus of the second aspect , an AC harness and a DC harness are separately passed through the plurality of paths.

According to a fourth aspect of the present invention, in the image forming apparatus according to any one of the first to third aspects, the replaceable part is a consumable part including a consumable part such as toner or ink.

According to a fifth aspect of the present invention, in the image forming apparatus according to any one of the first to third aspects, the replaceable component is a photoconductor unit.

According to a sixth aspect of the present invention, in the image forming apparatus according to any one of the first to third aspects, the replaceable component is a developing unit.

According to a seventh aspect of the present invention, in the image forming apparatus according to any one of the first to third aspects, the replaceable part is a cartridge in which a photosensitive unit and a developing unit are integrated.

According to an eighth aspect of the present invention, in the image forming apparatus according to any one of the first to third aspects, the replaceable part is a cartridge in which a photosensitive unit and a writing LD are integrated.

According to a ninth aspect of the present invention, in the image forming apparatus according to any one of the first to third aspects, the replaceable component is an ink ejection unit for image formation.

Pertaining to claim 1 0, including in any of the image forming apparatus of claims 1 to 3, wherein the replaceable parts, replaceable parts by users, the ink injection unit and the ink for image formation expendable It is a cartridge in which a component unit is integrated.

  In the image forming apparatus of the present invention, since a space physically separated from the image forming unit is formed in the apparatus, even if components that affect the image formation thermally or electrically are arranged in the space, There is an effect that the performance of image formation is not affected.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The premise of the present invention is as follows.
That is, the image forming apparatus includes an image forming unit having structural parts (side plates and the like) that form two opposing surfaces arranged perpendicular to the installation surface and parts that can be replaced by the user. And two surfaces of the structural component, a partition plate arranged between the structures parallel to the installation surface, and a substantially L-shaped stay fixed to the structure and in contact with the partition plate, thereby forming five surfaces By being surrounded, a space separated from the image forming unit is formed. The partition plate and the stay are fixed by various fixing methods such as screw fastening, riveting, and welding. In addition, in a space separated from the image forming unit, a set of components to be energized (board or the like) or the component and a bracket for holding the component is disposed, and the attachment is made to the stay.

  1 is a schematic cross-sectional view showing an outline of an image forming apparatus that is an object of the present invention, FIG. 2 is a perspective view of the structure of the image forming apparatus shown in FIG. 1, and FIG. 3 is shown in FIG. It is a front view of the structure of an image forming apparatus.

  FIG. 1 is an overall schematic view of a copying machine as an example of an image forming apparatus to be an object of the present invention. In FIG. 1, 110 is an image forming unit, 120 is a scanner unit, 130 is a transfer paper S (in this specification, transfer paper is not only paper but also OHP paper, etc.). A sheet feeding unit for storing and feeding out all the objects to be transferred) 140 is a pressure plate (or document feeder), and 150 is a contact glass. The paper feed unit 130 includes a pair of paper feed trays 160 and 160 and a manual feed tray 170. In the figure, reference numeral 180 denotes a paper discharge unit. In the figure, reference numeral 200 denotes a photosensitive unit including a photosensitive drum as a toner image carrier. Around the developing unit 210, an optical unit 220, a transfer conveyance belt 230, a resist roller pair 240, a thermal fixing device 250, a double-sided image. A reversing conveyance unit 260 and the like for forming are arranged. Since the configuration and operation of these copying machines are well known, description thereof will be omitted. Needless to say, the present invention is not limited to the illustrated type of image forming apparatus, and can be applied to various types.

  The structure of the image forming apparatus as described above includes a base 11, a front side plate 12, and a rear side plate 13, and a unit can be exchanged by a user through a hole 30 provided in the front side plate 12. . A plurality of holes 30 are provided in the front side plate of the image forming unit. In this embodiment, it is assumed that a toner bottle for supplying toner is disposed in the opening 43 so as to be replaceable by the user, and can be attached and detached through the opening 43. It is assumed that the writing unit is disposed in the opening 42 so that the writing unit can be replaced only by an operator who performs maintenance, and can be attached and detached through the opening 42. Further, a cartridge in which the photosensitive unit and the developing unit are integrated is disposed in the opening 41 so as to be replaceable by the user, and can be attached and detached through the opening 41.

  FIG. 4 is a schematic diagram of the structure shown in FIG. That is, the base 11, the front side plate 12 and the rear side plate 13 are provided. Between the side plates, a paper feed tray unit fixed to the side plate, a partition plate 14 for the image forming unit, and a stay 15 are arranged. It touches. As can be seen from FIG. 4, the space in the side plates 12 and 13 is divided by the stay 15 into a right half image forming portion X and a left half space separated from the image forming portion (hereinafter referred to as the left space portion Y). It has been.

  FIG. 5 is a perspective view of the image forming apparatus structure with the front side plate 12 of FIG. 4 removed. The lower portion of the stay 15 is in contact with the partition plate 14 and fastened with screws 40. Then, the substrate 21 is disposed in the left space Y separated from the image forming unit by the stay 15. FIG. 6 is a side view seen from the left side of FIG. 5 and shows that the substrate 21 is shaped to be fixed to the stay 15.

  FIG. 7 is a perspective view showing that the front plate 12 is not displayed as in FIG. 5, and the notch 15 a provided in the stay 15 is a path of the harness 22 from the substrate 21.

  In this image forming apparatus, as described above, the left space portion Y physically separated from the image forming section X is formed in the apparatus (inside the side plate). Even if a component (the substrate 21 in the example shown in the figure) that influences (thermal, electrical, etc.) is arranged, the performance of image formation is not affected. Further, since the left space Y is separated from the space (image forming portion X) in which the unit to be replaced by the user is arranged, the user touches even if dangerous parts are arranged in the left space Y. This is not possible, so that the safety of the user is ensured.

  And since the stay 15 and the partition plate 14 are being fixed by the screw fastening etc., the sealing property of the left space part Y improves, and thereby the influence on the image formation part X becomes less.

  Further, when an electrical component is arranged in the left space Y, if the stay 15 and the partition plate 14 are fixed by means such as screws, the electromagnetic waves from the electrical component can be imaged in the image forming unit X. An electrical shielding effect that does not affect the formation occurs.

  Further, even if an electrical component is arranged in the left space Y, heat generation and radiated electromagnetic waves from the component do not affect the image forming unit X.

  And since the notch 15a is provided in the edge part of the stay 15 which forms the left space part Y, the harness path | route of the electrical component arrange | positioned in the left space part Y separated can be ensured.

  A second embodiment of the present invention is shown in FIG. FIG. 8 also shows the image forming apparatus in which the front side plate 12 is not displayed. In the present embodiment, a gap is formed between the diaphragm 15 and the stay 15 by the throttle-shaped part (concave part) 13 a provided on the rear plate 13, and this is the path of the harness 22 from the substrate 21.

  That is, in the image forming apparatus according to the second embodiment, since the diaphragm-shaped portion 13a is provided on the rear side plate 13 forming the separated space, the harness path of the electrical component arranged in the left space portion Y is 2 The street can be secured. In addition, since the harness path is provided not by the notch but by the drawn portion 13a, the strength of the component is not affected.

  A third embodiment of the present invention is shown in FIG. FIG. 9 also shows the image forming apparatus in which the front side plate 12 is not displayed. In the present embodiment, the gap between the side plate and the stay is formed at the front and rear of the apparatus by the notch provided on the stay 15 and the narrowed portion 13a provided on the rear side plate 13, and becomes the path of the harness (22) (23). It shows that. If there are a plurality of paths, only the front plate side or the rear plate side may be used.

  In the image forming apparatus according to this embodiment, a plurality of harness paths can be provided, so that noise does not get on each other's signals via the plurality of harnesses. can do.

  For example, a plurality of harness paths can be formed by the drawing-shaped portion 13a provided in the rear side plate 13 and the notch 15a provided in the stay 15, and the AC harness 22 and the DC harness 23 can be passed through different paths. . Of course, if necessary, the arrangement of the AC and DC harnesses may be reversed from the example shown in the figure.

  If the AC harness 22 and the DC harness 23 are separately provided, the insulation distance between the harnesses can be maintained, and a short circuit and noise can be prevented.

1 is a schematic cross-sectional view showing an outline of an image forming apparatus that is an object of the invention. 1 is a perspective view of the structure of the image forming apparatus shown in FIG. Front view of the structure of the image forming apparatus shown in FIG. Schematic diagram of the structure shown in FIG. FIG. 4 is a perspective view of the image forming apparatus structure with the front plate of FIG. 4 removed. Side view from the left side of FIG. The perspective view which shows that the notch provided in the stay becomes the path | route of a harness with the structure similar to FIG. The perspective view which shows the 2nd Example of this invention. The perspective view which shows the 3rd Example of this invention

Explanation of symbols

11: Base 12: Front side plate 13: Rear side plate 13a: Drawing shape part (concave part)
14: Partition plate 15: Stay 15a: Notch 21: Substrate 22: Harness 23: AC harness 24: DC harness 30: Hole 40: Screw 41-43: Opening part 110: Image forming part 120: Scanner part 130: Paper feed Part 140: platen (or document feeder)
150: contact glass 160: paper feed tray 170: manual feed tray 180: paper discharge unit 200: photoconductor unit 210: developing device 220: optical unit 230: transfer transport belt 240: pair of registration rollers 250: heat fixing device 260: reverse transport Unit S: Transfer paper X: Image forming part Y: Left space part

Claims (10)

It has an image forming unit having a structural part such as a side plate that forms two opposing surfaces arranged perpendicular to the installation surface, and a replaceable part.
The structure part, a partition plate arranged in parallel with the installation surface between the structure configured to include the structure part, and a substantially L-shape fixed to the structure and in contact with the partition plate The two surfaces of the stay and the five surfaces surrounded by them form a space separated from the image forming unit,
The partition plate and the stay are fixed by screw fastening, riveting, welding, etc.,
In an image forming apparatus in which a set of parts such as a substrate or the like that require energization or a bracket that holds the parts is arranged in a space separated from the image forming unit, and the arrangement is made by attaching to the stay.
A notch is provided on a side that contacts the side plate of the stay, and a harness coming out of the board is provided through the notch, and a portion of the side plate that contacts the stay is in a direction opposite to a surface that contacts the stay. An image forming apparatus , wherein a concave portion is provided, and the harness from the substrate is routed between the concave portion and the stay . The image forming apparatus according to claim 1, before the concave portions or both of the cutout or the side plate of the kissing tape, harness route more than two portions are formed an image forming apparatus according to claim Rukoto. The image forming apparatus according to claim 2, the image forming apparatus characterized that you have passed separately AC harness and DC harness to the plurality of paths. The image forming apparatus of claims 1 to 3, wherein the replaceable component is an image forming apparatus, wherein consumable parts der Rukoto including consumables such as toner or ink. The image forming apparatus of claims 1 to 3, wherein the replaceable component is an image forming apparatus which is a photosensitive member unit. The image forming apparatus of claims 1 to 3, an image forming apparatus wherein the replaceable component is a development unit. The image forming apparatus of claims 1 to 3, the image forming apparatus, wherein the replaceable part is a cartridge with an integrated developing unit and the photosensitive member unit. The image forming apparatus of claims 1 to 3, wherein the replaceable component is an image forming apparatus, characterized in that the cartridge formed by integrating a photosensitive member unit and the writing LD. The image forming apparatus of claims 1 to 3, wherein the replaceable component is an image forming apparatus characterized by an ink injection unit for image forming. The image forming apparatus of claims 1 to 3, wherein the replaceable parts, replaceable parts by users is the cartridge with an integrated consumable component unit comprising an ink injection unit and the ink for image formation An image forming apparatus.