JP2001051461A - Copying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the vibration of a second box unit constituting an image forming part from being transmitted to a first box unit constituting an image reading part. SOLUTION: In this copying machine, a first box unit 42 constituting the image reading part comprises a frame body 425 consisting of vertically provided side plates 421, 422, 423 and 424, on four sides of front/rear and left/right, and a base plate 426 fixed on the bottom surface of the frame body 425, and left and right side plates 423 and 424 of the first box unit 42 are made apart from the base plate 426, then, the base plate 426 section respectively corresponding to these parted side plates 423 and 424 are connected to the second box unit 44 by plural screw members 522.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine in which a document image read by an image reading section is transferred to a recording sheet.

[0002]

2. Description of the Related Art Conventionally, this type of copier is exposed by an exposure light source such as a halogen lamp or the like.
An image reading unit including a line sensor for reading a document image reflected on the document surface, an optical unit for outputting the document image read by the image reading unit as laser light, and an output from the optical unit An image forming unit including an image forming unit including a photosensitive drum for forming an electrostatic latent image by a laser beam, forming a toner image from the electrostatic latent image and transferring the toner image to recording paper; I have.
The image reading unit is configured such that each component is housed in a first housing, and the image forming unit is configured such that each component is housed in a second housing. The body is placed on the second housing, and both are integrally connected by means such as screwing.

[0003]

However, in the above-mentioned conventional copying machine, a drive motor for operating a drive system of the image forming unit is provided in the second housing, and when the motor is driven to rotate. Inevitably, vibration occurs, and this vibration is transmitted to the second housing. The vibration transmitted to the second housing is transmitted to the first housing further above, and the vibration transmitted to the first housing is transmitted to each component of the image reading unit. There has been a problem that when reading a document image, components such as a line sensor may be blurred, thereby making it impossible to read the document image accurately.

The present invention has been made in view of the above circumstances, and effectively prevents the vibration of the second housing forming the image forming unit from being transmitted to the first housing forming the image reading unit. It is an object of the present invention to provide a copying machine capable of reducing the number of copies.

[0005]

To achieve the above object, according to the present invention, there is provided a first housing having an image reading section for reading an original image, and an image for transferring the original image to recording paper. A second housing having a forming unit, wherein the first housing is mounted on the second housing and the two are integrally connected to each other; The housing includes a frame body including side plates arranged upright on four sides, and a bottom plate fixed to the bottom surface of the frame body, and includes a side plate on at least one side of the frame body. It is characterized in that it is separated from the bottom plate, and a portion of the bottom plate corresponding to the separated side plate is connected to the second housing.

According to this configuration, the vibration of the second housing is transmitted to the bottom plate of the first housing via the connection point, and the side plate at the position corresponding to the connection point is moved from the bottom plate. Since they are separated, the vibration transmitted to the bottom plate is less likely to be transmitted to the side plates. Therefore, the transmission of the vibration of the second housing to the first housing can be effectively suppressed.

According to a second aspect of the present invention, in the first aspect, the first housing is directly mounted on the second housing and is attached to the second housing by a screw member. It is characterized by being connected.

According to this configuration, the vibration of the second housing is
It is difficult for the screw member to be transmitted to the bottom plate of the first housing in a portion where the screw member does not exist. Therefore, the transmission of the vibration of the second housing to the first housing can be effectively suppressed.

According to a third aspect of the present invention, in the first aspect, the first housing is mounted on the second housing via a spacer, and the second housing is mounted by a screw member. It is characterized by being connected to the body.

According to this configuration, the vibration of the second housing is
In the place where the spacer does not exist, the bottom plate of the first housing is not transmitted to the bottom plate of the first housing. Even if the vibration of the second housing is transmitted to the bottom plate of the first housing, the side plate of the connection point is connected to the bottom plate. , The vibration of the bottom plate is hardly transmitted to the side plate. Therefore, the transmission of the vibration of the second housing to the first housing can be more effectively suppressed.

According to a fourth aspect of the present invention, in the third aspect, the spacer is provided so as to penetrate the screw member.

According to this configuration, the spacer can be fixed by the screw member. Therefore, the spacer can be reliably positioned at a predetermined position.

[0013]

FIG. 1 is an internal configuration diagram for explaining a schematic configuration of a copying machine according to an embodiment of the present invention. In this figure, a copying machine 10 includes an image reading unit 12
And the original placement unit 1 located above the image reading unit 12
4 and an image forming unit 16 located below the image reading unit 12
It is composed of

The image reading section 12 includes a first optical system 18, a second optical system 20, a lens 22, and a line sensor 24. The first optical system 18 includes an exposure light source 181 composed of a halogen lamp or the like, a reflection plate 182 for reflecting the light of the exposure light source 181 to the document surface, and a document image irradiated by the exposure light source 181 and reflected on the document surface. And a reflecting mirror 183 for directing light in the direction. The second optical system 20 includes a plurality of reflecting mirrors 201 and 202 that guide the original image reflected by the reflecting mirror 183 to the lens 22 that forms an image on the line sensor 24.
It has. The line sensor 24 is a CCD (Charge C)
and a length corresponding to the size in the width direction (depth direction in the figure) of a document placed on a contact glass 141, which will be described later. The original image read at
After a predetermined signal processing, the digital signal is converted into a digital signal and stored in a memory (not shown).

A pair of guide rails 26 (which guide the first optical system 18 and the second optical system 20 between a left end position and a right end position in the drawing of the contact glass 141 described later) are provided above the image reading section 12. Only one of them is shown in the figure, and is disposed at both ends in the width direction (the depth direction in the figure), and the first and second optical systems 18 and 20 reciprocate along the guide rail 26 by a motor (not shown). It is configured as follows.

The document placement unit 14 is provided above the image reading unit 12, a contact glass 141, a document holding unit 142 for opening and closing the surface of the contact glass 141, and a document holding unit 142. Automatic document feeder 1
43. The automatic document feeder 143 automatically feeds a plurality of documents set at the placement position onto the contact glass 141 one by one sequentially, and returns the read documents to the placement position in order. Things.

The image forming section 16 includes an optical unit 28,
It comprises an image forming section 30 and a sheet transport section 32. The optical unit 28 exposes the original image read by the line sensor 24 read from the memory (not shown) to a photosensitive drum 301 described later, and is generated based on the read image data. A light emitting unit 281 that converts the modulated signal into a laser beam and outputs the laser beam, and a laser beam from the light emitting unit 281
And a reflection mirror 282 that reflects the light toward the optical disc 01.

The image forming unit 30 includes a photosensitive drum 301 that is rotated at a constant speed in a clockwise direction in the figure, and includes a charger 302, a developing unit 303, and a cleaning unit along the peripheral surface of the photosensitive drum 301. And a unit 304 in order.
The photosensitive drum 301 is driven to rotate by a drive motor 34, and an electrostatic area is formed at a position facing the charger 302. An electrostatic latent image is formed in this electrostatic area by laser light output from the optical unit 28. Then, the electrostatic latent image is developed into a toner image at a position facing the developing unit 303. A transfer roller 36 is provided below the photosensitive drum 301. The photosensitive drum 301 on which the toner image is formed transfers the toner image to recording paper (transfer paper) at a position facing the transfer roller 36. Then, the toner remaining on the surface at the position facing the cleaning unit 304 is removed.

The paper transport section 32 transports recording paper (transfer paper) along a path indicated by an arrow A, and is a cassette loading section for loading a paper cassette in which recording papers are stored in an accumulated state. 321, an upstream conveyance path 322 for guiding the recording paper pulled out from a paper feed cassette PC loaded in the cassette loading unit 321 by a paper feed roller (not shown) to the photosensitive drum 301, And a downstream transport path 323 for guiding the recording paper on which the image has been transferred to the discharge tray 38 attached to the left side in the figure. A pair of transport rollers (not shown) is provided at an appropriate position on the upstream transport path 322, and a pair of resist rollers (not shown) is provided near the photosensitive drum 301. An unillustrated transport roller pair is disposed at an appropriate position on the downstream transport path 323, and an unillustrated fixing unit is disposed at a position near the photosensitive drum 301. These pairs of transport rollers and pairs of registration rollers are driven to rotate by a drive motor 34 via, for example, an electromagnetic clutch.

FIG. 2 shows a copying machine 1 constructed as described above.
The housing 4 with the cover disposed on the outer surface of the housing 0 removed.
It is a perspective view which shows the principal part of No. 0. In FIG.
Reference numeral 0 denotes a first case 42 made of a metal plate forming the image reading unit 12 and a second case 44 made of a metal plate forming the image forming unit 16.

The first housing 42 has therein the image reading section 12.
First optical system 18, second optical system 20, lens 2
2, the line sensor 24 and the like are housed therein, and the upright front side plate 421 and the upside right side plate 423 arranged facing each other in the front-rear direction, and the upright right side plate 423 arranged facing the left and right direction; The left side plate 424 is formed in a box shape by a frame 425 assembled together by welding means such as welding, and a bottom plate 426 attached to the bottom surface of the frame 425 by welding means such as welding. The right side plate 423 and the left side plate 424 are attached separately from the bottom plate 426 so as to form a gap G1 with the bottom plate 426. The right side plate 423 and the left side plate 424 are joined to the bottom plate 426 by joining means such as welding via a joining member 46 (only one is shown in the drawing) at an intermediate portion in order to secure mechanical strength. On the front surface of the front side plate 421, an operation panel frame 50 made of a synthetic resin constituting an operation unit on which a start button, a numeric keypad and the like are disposed is attached. At a predetermined position of the bottom plate 426, a cutout is formed for drawing out wiring connected to the exposure light source 181 and the line sensor 24 to the second housing 44.

The second housing 44 contains the image forming section 16 inside.
The optical unit 28, the image forming unit 30, the paper transport unit 32, and the like are housed, and the upright front plate 441 and the rear plate 442 that are disposed to face each other in the front-rear direction.
The upright right side plate 443 and the left side plate 444 arranged to face each other in the left and right direction are assembled together by joining means such as welding. The upper portion of the front side plate 441 has an opening shape so that components such as the optical unit 28 and the image forming unit 30 can be attached and detached. The upper part of the left side plate 444 has an opening shape for discharging the recording paper on which the document image has been transferred to the outside, except for the crosspiece 445 on which the first housing 42 is placed.

FIG. 3 shows a first housing 42 and a second housing 44.
FIG. 4 is an enlarged perspective view of a main part for describing a connection structure with the main body.
In this figure, the left and right side plates 4 in the second housing 44 are shown.
43, 444 (only the side plate 443 is shown in the figure), and a long bar member 52 (the side plate 443 in the figure)
(Only the sides are shown) are attached to the side plates 443 and 444 by a plurality of screw members 521, respectively, and the first housing 42 is attached to these cross members 52. That is, the first housing 42 is directly connected to the second housing 44 via the crosspiece 52, and the bottom plate 426
At two places corresponding to the left and right side plates 423 and 424 respectively (between the front side plate 421 and the joining member 46 and between the rear side plate 422 and the joining member 46), they are attached to the beam member 52 with the screw member 522. Have been.

The second housing 4 of the first housing 42 as described above.
According to the mounting structure on the left and right side plates 42, even if the vibration generated by the drive motor 34 is transmitted to the second housing 44 and the vibration is transmitted to the bottom plate 426 of the first housing 42.
3, 424 are separated from the bottom plate 426,
26 is hardly transmitted to the left and right side plates 423 and 424. As a result, the vibration transmitted to the first housing 42 is very small, and the configuration of the line sensor 24 and the like when reading the document image by the image reading unit 12 is reduced. The original image can be accurately read because the members are not shaken.

FIG. 4 shows a first housing 42 and a second housing 44.
It is a principal part expansion perspective view for demonstrating another connection structure with this. Since the mounting structure shown in FIG. 4 is basically the same as that shown in FIG. 3, the description of the same constituent members will be omitted by giving the same reference numerals thereto, and the connection shown in FIG. Only differences from the structure will be described.

That is, the first housing 42 is connected to the second housing 44 while being separated from the second housing 44, and is formed of a metal material between the bottom plate 426 and the crosspiece member 52. By interposing a plurality of spacers (separating members) 54, the gap G between the bottom plate 426 and the beam member 52 can be increased.
2, and is attached to the crosspiece member 52 by a screw member 523 that penetrates the spacer 54. The spacer 54 may be previously joined to the bottom plate 426 or the beam member 52 by a joining means such as welding, or the first housing 42 may be joined to the beam member 5 by a screw member 523.
2 may be provided so as to penetrate the screw member 523. When the spacer 54 is disposed so as to penetrate the screw member 523 in this manner, the spacer 5
4 can be reliably positioned at a predetermined position, and since it is not necessary to attach it to the bottom plate 426 or the cross member 52 in advance, the assembly process can be simplified. The spacer 54 may be formed of a material other than metal such as hard rubber.

The second housing 4 of the first housing 42 as described above.
According to the mounting structure on the fourth housing 4, even if the second housing 44 is vibrated by the drive motor 34, the bottom plate 426 is mounted separately from the second housing 44. Is hardly transmitted to the bottom plate 426 of the first housing 42, and since the left and right side plates 423 and 424 are separated from the bottom plate 426, the vibration of the bottom plate 426 is not transmitted to the left and right side plates 42.
As a result, the first housing 42 does not vibrate much, and the image reading unit 12
When reading the original image by the above, the constituent members such as the line sensor 24 do not shake, so that the original image can be read accurately.

As described above, the copier 10 according to the embodiment of the present invention has the first housing 42 that constitutes the image reading unit 12.
The left and right side plates 423 and 424 are separated from the bottom plate 426. Therefore, even if the vibration generated by the drive motor 34 or the like during the copying operation is transmitted to the second housing 44 constituting the image forming unit 16, Vibration is in the second case 4
4 to the first housing 42 can be effectively suppressed, and the original image can be accurately transferred to the recording paper. Further, by connecting the first housing 42 separately from the second housing 44, even if vibration generated by the drive motor 34 or the like during the copying operation is transmitted to the second housing 44, the vibration can be reduced. The transmission from the second housing 44 to the first housing 42 can be more effectively suppressed, and the original image can be accurately transferred to the recording paper.

The copying machine 10 according to the present invention is not limited to the above-described embodiment, but may employ various modifications as described below.

That is, in the above-described embodiment, the left and right side plates 423, 424 are separated from the bottom plate 426. For example, the vibration of the right plate 443 of the second housing 44 is large, and the vibration of the left plate 444 is large. Is small, only the right side plate 423 may be separated from the bottom plate 426.

In the above embodiment, the first housing 42
Is connected to the second housing 44 via the beam member 52, but if a connection space can be secured in the second housing 44, the first housing 42 is not connected via the beam member 52. Second
It is also possible to connect to the case 44.

Further, in the embodiment shown in FIG.
Although the housing 42 is connected to the second housing 44 by the screw member 522, the housing 42 may be attached by joining means such as welding. In the case of attachment by joining means such as welding, the side plates 423, 4 of the bottom plate 426
The entire portion corresponding to 24 may be joined.
However, when the connection is made by the screw member 522, the vibration of the second housing 44 is less likely to be transmitted to the bottom plate 426 where the screw member 522 does not exist.
Is transmitted to the first housing 42 effectively.

In the above embodiment, the copying machine 10
Although the digital type using the line sensor 24 is used, it can be applied even to a conventional analog type, and can also be applied to a type having other functions such as a facsimile function. Needless to say.

[0034]

As described above, according to the first aspect of the present invention, the first housing has a frame composed of side plates arranged upright on four sides and a bottom surface of the frame. A bottom plate that is fixed, at least one of the side plates of the frame body is separated from the bottom plate, and a portion of the bottom plate corresponding to the separated side plate is connected to the second housing. The vibration of the housing is the first
As a result, even if the vibration is transmitted to the bottom plate of the housing, the vibration of the second housing forming the image forming unit is transmitted to the first housing forming the image reading unit. It can be suppressed effectively.

According to the second aspect of the present invention, the first housing is directly mounted on the second housing and connected to the second housing by the screw member. Vibration of the second housing is less likely to be transmitted to the bottom plate of the first housing in a portion where the screw member does not exist, so that the vibration of the second housing is effectively transmitted to the first housing. Can be suppressed.

According to the third aspect of the present invention, the first housing is mounted on the second housing via the spacer, and is connected to the second housing by the screw member. In addition, the vibration of the second housing becomes difficult to be transmitted to the bottom plate of the first housing in a portion where the spacer does not exist, and the vibration of the bottom plate is hardly transmitted to the side plate. First
That is transmitted to the housing.

According to the fourth aspect of the present invention, since the spacer is provided so as to penetrate the screw member, the spacer can be reliably positioned at a predetermined position.

[Brief description of the drawings]

FIG. 1 is an internal configuration diagram for explaining a schematic configuration of a copying machine according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of a housing constituting the copying machine shown in FIG.

FIG. 3 is an enlarged perspective view of a main part for describing a connection structure between a first housing and a second housing constituting the housing shown in FIG. 2;

FIG. 4 is an enlarged perspective view of a main part for describing another connection structure between a first housing and a second housing constituting the housing shown in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Copier 12 Image reading part 14 Document placement part 16 Image forming part 42 1st housing 44 2nd housing 54 Spacer 421 Front side plate 422 Rear side plate 423 Right side plate 424 Left side plate 426 Bottom plate 522, 523 Screw member

Claims (4)

[Claims] A first housing having an image reading section for reading an original image, and a second housing having an image forming section for transferring the original image onto recording paper; A copying machine comprising a housing mounted on a second housing and integrally connecting the two, wherein the first housing includes side plates disposed upright on four sides. A frame, comprising a bottom plate fixed to the bottom surface of the frame, separating a side plate of at least one side of the frame from the bottom plate, and a portion corresponding to the separated side plate of the bottom plate. A copying machine characterized by being connected to a second housing. 2. The copying apparatus according to claim 1, wherein the first housing is directly mounted on the second housing and connected to the second housing by a screw member. Machine. 3. The device according to claim 1, wherein the first housing is mounted on the second housing via a spacer, and is connected to the second housing by a screw member. Copier. 4. The copying machine according to claim 3, wherein the spacer is provided so as to penetrate the screw member.