JPH10268599A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an image forming device capable of preventing vibration from a hinge part from being transmitted when an image reading part and an image forming part are coupled through a hinge. SOLUTION: This device is equipped with the image reading part 101 reading an original image, and the image forming part 111 forming the image according to read image data. In such a case, the reading part 101 is positioned on the upside of the forming part 111, the reading part 101 and the forming part 111 are coupled through the hinge member, and the reading part 101 is rotated to be opened on the upside of the forming part 111. A vibration-proof rubber 130 is provided between the reading part 101 and the forming part 111 so as to form a clearance between the pin of the pin part of the hinge member and the hole of a hole part in which the pin is fit when the reading part 101 is placed on the upside of the forming part 111.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus in which an image forming section and an image reading section are connected by a hinge, and is particularly suitable for a digital copying machine or the like.

[0002]

2. Description of the Related Art Conventionally, vibrations generated in an image forming unit (hereinafter, referred to as a "printer") of an image forming apparatus are transmitted to an image reading unit (hereinafter, referred to as a "scanner"), and optical components in the scanner such as a mirror. To give vibrations. In this case, there is a problem in that the image in which the oblique lines are formed on the document is jagged, or the density of the halftone portion such as banding is generated and the image quality is deteriorated. As a countermeasure, there is known an apparatus in which a scanner and a printer are fixed via anti-vibration rubber. As this prior art, as described in JP-A-62-279772, a frame of an image reading unit provided above an image forming unit is fixed to a frame of the image forming unit via a cushioning material. A known digital image forming apparatus is known.

There are also many known image forming apparatuses in which a writing unit and an electrical unit are arranged immediately below a scanner. In such an apparatus, it is necessary to remove the scanner when performing maintenance of the writing unit and the electrical unit. In this case, if the scanner is configured to be completely separated from the printer, a space for placing the scanner during maintenance is required. However, if there is no space around the image forming apparatus, maintenance becomes difficult. Therefore, there is also known an apparatus in which a scanner and a printer are connected by a hinge and the scanner is rotated and opened above the printer during maintenance. Such a prior art is disclosed in Japanese Patent Application Laid-Open No. 1-1918.
As described in Japanese Patent Application Publication No. 74-74, there is known a digital copying machine in which an upper casing having a scanner section and a lower casing having an image forming section are connected by a hinge.

However, in an image forming apparatus in which a scanner and a printer are connected by a hinge, even if the scanner is mounted on the printer via an anti-vibration rubber, vibrations of the printer are transmitted to the scanner from the hinge portion, and abnormalities are caused. Problems such as generation of an image occur, and in the above-described related art, the image forming apparatus having such a configuration cannot sufficiently take measures against vibration.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and in an image forming apparatus in which a printer and a scanner are connected by a hinge, an image forming apparatus capable of preventing transmission of vibration from a hinge portion. It is intended to provide a device.

[0006]

According to a first aspect of the present invention, there is provided an image forming apparatus comprising: an image reading unit for reading a document image; and an image forming unit for forming an image based on the read image data. In the apparatus, the image reading unit is located above the image forming unit, the image reading unit and the image forming unit are connected by a hinge member, and the image reading unit is rotatable and openable above the image forming unit. A vibration isolating rubber is provided between the image forming unit and the image reading unit. When the image reading unit is placed on the upper side of the image forming unit, the pin of the hinge member and the hole of the hole in which the pin is fitted are formed. It is characterized by having a clearance between them.

According to a second aspect of the present invention, in the first aspect, the hinge member has a pin portion on the image reading portion side and a hole portion on the image forming portion side. The center position of the pin of the side pin portion is set to a position higher than the center position of the hole of the hole portion on the image forming unit side.

According to a third aspect of the present invention, in the first aspect of the present invention, when the hinge member has a hole on the image reading portion side and a pin portion on the image forming portion side, the hinge member has an image reading portion. The center position of the hole of the side hole is set to a position higher than the center position of the pin of the pin portion on the image forming unit side.

According to a fourth aspect of the present invention, there is provided an image forming apparatus comprising: an image reading unit for reading an original image; and an image forming unit for forming an image based on the read image data. Is above the image forming unit, the image reading unit and the image forming unit are connected by a hinge member, the image reading unit is rotatable and open above the image forming unit, and the hinge member is an image reading unit or It is characterized in that it is attached to the image forming section via a vibration-proof rubber.

According to a fifth aspect of the present invention, there is provided an image forming apparatus comprising: an image reading unit that reads an original image; and an image forming unit that forms an image based on the read image data. Is above the image forming unit, the image reading unit and the image forming unit are connected by a hinge member, and the image reading unit is rotatable and openable above the image forming unit, and a pin or a hole of the hinge member is provided. Is characterized in that a vibration isolating rubber is provided on the sliding portion.

According to a sixth aspect of the present invention, in order to solve the above-mentioned problem, the sliding surface of the hinge member formed of a vibration-proof rubber member is coated with a material having a low coefficient of friction. Alternatively, the sliding portion of the hinge member is integrally formed of a material having a low coefficient of friction.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an image forming apparatus according to the present invention will be described below with reference to the drawings.
The digital full-color copying machine as shown in FIG. 1 can be roughly divided into a scanner 101 on the upper side of the copying machine and a printer on the lower side of the copying machine. Contact glass 10 on which the original is placed
The first carriage 1 and the second carriage 2 are arranged below the second carriage 2. The first carriage 1 includes an exposure lamp 3 and a first mirror 4, and the exposure lamp 3 and the first mirror 4 can be integrally moved in parallel with the document surface. Exposure lamp 3
Is reflected by the original, and the reflected light is reflected by the first mirror 4 in the horizontal direction. The second carriage 2 includes a second mirror 5 and a third mirror 6, and the second and third mirrors 5 and 6 can be integrally moved in parallel with the document surface. The second and third mirrors 5 and 6 are obliquely arranged so that their reflection surfaces are at right angles to each other, and fold the reflected light from the first mirror 4 in the horizontal direction. First carriage 1 and second carriage
The first carriage 1 moves at twice the speed of the second carriage 2 in order to keep the two optical distances constant.

The light reflected by the third mirror 6 is condensed by a lens 105 as an optical means, and is color-separated and imaged by a CCD 106 as a photoelectric conversion element. CCD1
Blue, Green, Red, Bl read at 06
The color separation image signal intensity level of acK is converted into an electric signal, and the electric signal is subjected to a color conversion process by an image processing unit (not shown), and is subjected to Yellow (hereinafter referred to as Y),
a (hereinafter M), Cyan (hereinafter C), Bl
ack (hereinafter referred to as BK) color image data is obtained.
The color image data is written into a writing unit 11 including a semiconductor laser, a polygon mirror, an fθ lens, and the like of the printer 111.
The latent image is formed by writing on the photoreceptor 115 by 4, and the latent image is visualized in Y, M, C, and BK by a color developing unit 117, and is superimposed to form a four-color image. More specifically, the first color latent image is
, And is transferred onto the transfer belt 118. For example, toner images of respective colors are transferred onto the transfer belt 118 in the order of Y, M, C, and Bk. The color image thus formed on the transfer belt 118 is transferred by the paper transfer roller 120 to the transfer paper sent from the paper supply unit 112 or the manual feed unit 113. The transferred transfer paper is conveyed to a fixing unit 122 by a conveyance belt 121, and the toner image on the transfer paper is melted and pressed by the fixing unit 122,
Fixed on transfer paper. Photoconductor 115, transfer belt 118
The toner not transferred above is removed by the cleaning unit 119.

In the above-described copying machine, the vibration generated by the driving device of the printer 111 during scanning of the original is transmitted to the scanner 101, and the CCD 106, the reflection mirror 4,
When 5 and 6 vibrate, an oblique line on a document may be jagged on a formed image, or halftone density unevenness called banding may occur. Therefore, the vibration of the printer 111
In order to prevent transmission to the scanner 101, a dustproof rubber 130 is interposed between the scanner 101 and the printer 111.

As shown in FIG. 2, the dust-proof rubber is formed between two sheet metal members 131 and 133.
, The lower sheet metal part 131 is screwed to the printer fixing part with a screw 135, the upper sheet metal 133 is screwed to the scanner fixing part 136 with a screw 135, and the printer 111 and the scanner 101 are connected. As another shape, as shown in FIG. 3, an I-shaped anti-vibration rubber 130 having a through hole 11 in the center is press-fitted and fixed to the hole 12 of the scanner fixing portion 136, and the through-hole of the anti-vibration rubber 130 is formed. Some are screwed to the printer fixing part 137 with screws 135 penetrating the printer 11. Also, as shown in FIG. 4, a rubber anti-vibration rubber 130 having an inverted concave longitudinal section is fixed to the lower surface of the scanner fixing portion 136 with a screw 135, and a convex portion formed on the printer side is formed in the concave portion 13 of the rubber anti-vibration 130. In some cases, the part 14 is inserted. The lower end of the vibration-proof rubber 130 shown in FIG. 4 may be fixed to the printer 111 by an appropriate means. In each of the above three types, the printer 111 and the scanner 101 are connected via an anti-vibration rubber.
The printer 111 and the scanner 101 are not directly connected to each other by a rigid body such as a screw so as not to transmit the data to the scanner 101.

In the present embodiment, a hinge is provided between the scanner 101 and the printer 111 for maintenance of the writing unit 114 and the developing unit 117 below the scanner, and the scanner 101 is rotated upward and opened. It has a configuration. The opening direction includes a left-right direction when viewed from the front of the copying machine (right opening in FIG. 5) and a front-rear direction (front opening in FIG. 6) viewed from the front of the copying machine.
It is selected according to the installation space of the copying machine.

As a hinge used in the present embodiment, as shown in FIG. 7, a pin portion 14 formed by bending a plate into an L-shape is used.
A pin 143 is fixedly implanted in the vertical piece of No. 2 and a hole 146 is formed in a hanging piece of a hole 147 formed of an inverted L-shaped flat plate, and the pin 143 is fitted into the hole 146. A hole 147 of the hinge is fixed to the scanner with a screw, and a pin 142 is fixed to the printer with a screw.
46, the pin 143 of the pin 142 may be inserted. Alternatively, the hinge 147 may be fixed to the printer with a screw, and the pin 142 may be fixed to the scanner.
Is fixed with a screw, and the pin 142 is inserted into the hole 146 of the hole 147.
May be inserted.

The contact between the pin 143 of the hinge 141 and the hole 146 causes the printer 111 and the scanner 101 to contact each other.
In order to prevent the transmission of vibration, the diameter D of the hole 146 is set to be larger than the diameter d of the pin 143, and when the scanner 101 is mounted on the printer 111, And the hole 146 are connected with a clearance. This example is shown in FIG. The clearance ((D−d) / 2) at this time is 0.5 to 1.5 mm
A degree is desirable. If the clearance is too small, the pin 143 contacts the hole 146 of the hinge 141 in a state where the scanner 101 is mounted on the printer 111, and vibration is transmitted therefrom. If the clearance is too large, rattling occurs in the hinge 141 when the scanner 101 is released from rotation, and the load of the scanner 101 is suddenly applied to the pin 143, so that the operator is not damaged until the pin 143 is damaged or the pin 143 is not damaged. When the scanner 101 is released, a feeling of rattling is felt by the hinge 141, and operability is deteriorated.

Generally, the vibration-proof rubber deteriorates after 3 to 5 years, and the thickness is t as shown in FIG.
There is a problem that it becomes thinner. As shown in FIG. 9, when the thickness t ′ of the vibration isolation rubber 130 is reduced, the scanner 101
The gap between the printer and the printer 111 is reduced. The amount of change varies depending on the material and shape of the vibration-proof rubber, but the amount of change is about 0.5 to 1 mm. If this amount of change is large, even if the clearance is initially provided between the hole 146 of the hinge 141 and the pin 143, the pin 143 and the hole 1 will change over time.
46 comes into contact, and the vibration of the printer 111 is transmitted to the scanner 101. So, as a countermeasure,
As shown in FIG. 10, when the image forming unit side is the pin 143 and the scanner 101 side is the hole 146, the center of the hole 146 is
3 higher than the center. The dimension L to be increased at this time is
Even if the thickness of the rubber cushion 130 changes, the pin 143 and the hole 146 need to be set to such an extent that the pin 143 and the hole 146 do not contact each other. Hole 14
Depending on the clearance between the pin 6 and the pin 143 and the amount of change in the thickness of the anti-vibration rubber 130, L is desirably about 0.5 to 1 mm, which is the amount of change with time of the anti-vibration rubber. Of course, when the scanner is released, it is necessary that the hinge 141 does not rattle. Alternatively, as shown in FIG. 22, the upper part of the pin 143 is cut in the length direction of the pin, or as shown in FIG. 23, the upper part of the hole 146 is enlarged by a dimension L ′, and the hole 146 on the scanner 101 side is lowered. However, the upper wall of the hole 146 may not contact the pin 143. In this way, it is possible to prevent the clearance between the pin 143 and the hole 146 from becoming unnecessarily large and prevent the hinge 141 from rattling when the scanner 101 is released.

On the other hand, when the pin 143 is on the scanner 101 side and the hole 146 is on the printer 111 side, the height of the center of the pin 143 is made higher than the center of the hole 146 as shown in FIG. At this time, as in the case described above, the dimension L to be increased is determined by the pin 1 even if the thickness of the vibration isolating rubber 130 changes.
43 and hole 146 need not be in contact with each other.
Is desirably about 0.5 to 1 mm, which is about the amount of change with time of the vibration isolating rubber. Alternatively, as shown in FIG.
25 is cut in the length direction of the pin, or as shown in FIG. 25, the lower side of the hole 146 is increased by a dimension L ′ so that even if the pin 143 on the scanner 101 side comes down,
3 and the hole 146 may not be in contact with each other. This makes it possible to prevent the clearance between the pin 143 and the hole 146 from becoming unnecessarily large and prevent the hinge 141 from rattling when the scanner 101 is released.

FIG. 12 shows an example in which the pin portion 142 of the hinge 141 is fixed to the scanner 101 or the printer 111 via a vibration-proof rubber. By doing so, even though the pin 143 and the hole 146 are in contact with each other, the hinge 141 is fixed to the printer 111 or the scanner 101 via the vibration-proof rubber 130 and is not in direct contact. Vibration can be prevented from being transmitted. In the illustrated example, the pin portion 142 is fixed via the anti-vibration rubber 130, but the hole 147 is similarly fixed to the scanner 1 via the anti-vibration rubber 131 as shown in FIG.
01 or the printer 111. Further, both the pin portion 142 and the hole portion 147 may be fixed to the scanner 101 or the printer 111 via a vibration-proof rubber.

FIG. 1 shows an example in which an anti-vibration rubber 131 is provided at the sliding portion between the pin 143 and the hole 146 of the hinge 141.
3 is shown. In this example, a vibration isolating rubber is sandwiched in a part of the length of the pin 143 in the length direction. In this figure, the portion where the hole 146 contacts the pin 143 is on the tip side of the pin 143 from the vibration-proof rubber 131, and the surface to be caulked or welded to the pin portion 142 is the root side of the pin 143. Alternatively, as shown in FIG.
3 may be integrally formed with the pin portion 142 via the vibration-proof rubber 131. That is, the vibration isolating rubber is interposed between the pin portion 142 and the root portion of the pin 143. With such a configuration, the transmission of vibration is blocked by the vibration isolating rubber 131, the rattling when the scanner 101 is released from rotation is eliminated, and the vibration isolating rubber can be fixed to the pin portion 142 at the time of manufacturing parts. Therefore, it is not necessary to attach a vibration isolating rubber as a separate part at the time of assembling, and assemblability is improved.

FIG. 16 shows an example in which the sliding surface of the hinge itself is made of an anti-vibration rubber, that is, the sliding surface between the pin 143 and the hole 146 is made of an anti-vibration rubber. FIG. 17 is a sectional view of FIG. The anti-vibration rubber 131 is integrally wound around the outer periphery of the pin 143 and molded, and the pin 143 and the pin portion 142 are fixed by caulking or welding. By doing so, the rigidity of the entire hinge can be increased as compared with the example of FIG. In the example of the hinge shown in FIG.
Although the pin 143 tilts due to the deformation of the pin 31 and it becomes difficult to open the scanner 101, the entire sliding portion of the hinge as shown in FIG.
43 can be prevented. FIG.
A vibration isolating rubber 131 is integrally formed on the sliding surface of the pin 6, that is, the inner peripheral surface of the hole 146. In this example, as in the example shown in FIG.
The inclination of 3 disappears.

In the configuration shown in FIG. 16, since the sliding surface of the hinge is made of a vibration-proof rubber, the coefficient of friction is large, and a large force is required when the operator rotates and opens the scanner 101. In order to alleviate such deterioration in operability, the surface of the vibration-isolating rubber 131 is coated with a material 132 having a low coefficient of friction such as a fluorine-based resin as shown in FIG. A metal dry bearing 133 may be formed integrally with the sliding portion of the vibration rubber 131. By doing so, the rotation of the scanner 101 can be smoothly opened.

As described above, the printer 111 is connected to the scanner 101 by the hinge 141,
Although the embodiment of the copier in which the scanner 101 is mounted on the printer 111 via the printer 111 has been described, as shown in FIG. It goes without saying that the same structure as the vibration isolating structure described so far can be used for the object. Further, the laser light of the writing unit 114 and the mirror 125
When the image fluctuates, a straight line on the document fluctuates during image formation or banding occurs. Therefore, the writing unit 114 may be fixed via an anti-vibration rubber.

Although the above embodiment has been described using a full-color copying machine as an image forming apparatus, the same configuration can be used for all image forming apparatuses such as a digital copying machine and a facsimile.

[0027]

According to the first aspect of the present invention, in an image forming apparatus having an image reading unit for reading a document image and an image forming unit for forming an image based on the read image data, the image reading unit is an image forming unit. The image reading unit and the image forming unit are coupled by a hinge member, and the image reading unit is rotatable and openable above the image forming unit, and a protection is provided between the image reading unit and the image forming unit. A vibration rubber is provided so that when the image reading unit is placed on the upper side of the image forming unit, a clearance is provided between the pin of the pin of the hinge member and the hole of the hole in which the pin is fitted, It is possible to prevent transmission of vibration from the hinge member to the scanner without adding a special member.

According to a second aspect of the present invention, in the first aspect of the present invention, when the image reading section side is a pin section and the image forming section side is a hole section, the hinge member has a pin section on the image reading section side. Since the center position of the pin is set to a position higher than the center position of the hole in the hole on the image forming unit side, even when the anti-vibration rubber is deformed with time and the scanner is lowered to the printer side,
The pin and the hole of the hinge can be prevented from coming into contact with each other, and the transmission of vibration from the hinge member to the scanner can be prevented even with time.

According to a third aspect of the present invention, in the first aspect of the present invention, when the image reading unit side is a hole and the image forming unit side is a pin, the hinge member has a hole on the image reading unit side. Since the center position of the hole is set to a position higher than the center position of the pin of the pin portion on the image forming unit side, even when the anti-vibration rubber is deformed with time and the scanner is lowered to the printer side,
The pin and hole of the hinge can be prevented from contacting,
Vibration transmission from the hinge member to the scanner can be prevented over time.

According to a fourth aspect of the present invention, in an image forming apparatus having an image reading section for reading a document image and an image forming section for forming an image based on the read image data, the image reading section is a part of the image forming section. On the upper side, the image reading unit and the image forming unit are connected by a hinge member, and the image reading unit is rotatable and openable above the image forming unit, and the hinge member prevents the image reading unit or the image forming unit from rotating. Since it is attached via the vibration rubber, even if the pin of the hinge and the hole come into contact, the transmission of vibration from the printer to the scanner can be prevented.

According to the fifth aspect of the present invention, in an image forming apparatus having an image reading section for reading a document image and an image forming section for forming an image based on the read image data, the image reading section is a part of the image forming section. On the upper side, the image reading unit and the image forming unit are connected by a hinge member, and the image reading unit is rotatable and openable on the upper side of the image forming unit, and is connected to a sliding portion of a pin or a hole of the hinge member. Since the anti-vibration rubber is provided, it is possible to prevent the scanner from being difficult to rotate and open due to the fall of the hinge due to the deformation of the anti-vibration rubber, and to prevent transmission of vibration from the printer to the scanner.

According to a sixth aspect of the present invention, in the invention of the fifth aspect, a sliding surface of the hinge member formed of the vibration isolating rubber member is coated with a material having a low coefficient of friction,
Alternatively, since the sliding portion of the hinge member is integrally formed of a material having a low coefficient of friction, the scanner can be rotated and opened with a small force, and transmission of vibration from the printer to the scanner can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view illustrating an embodiment of an image forming apparatus according to the present invention.

FIG. 2 is a perspective view showing an example of a vibration-proof rubber applicable to the present invention.

FIG. 3 is a side view showing another example of the vibration-proof rubber applicable to the present invention.

FIG. 4 is a side view showing another example of the vibration-proof rubber applicable to the present invention.

FIG. 5 is a simplified front view showing another embodiment of the image forming apparatus according to the present invention.

FIG. 6 is a side view schematically showing still another embodiment of the image forming apparatus according to the present invention.

FIG. 7 is a perspective view showing an example of a hinge applicable to the present invention.

FIG. 8 is a perspective view showing another example of a hinge applicable to the present invention.

FIG. 9 is a side view showing a temporal change of the vibration isolating member.

FIG. 10 is a perspective view showing still another example of a hinge applicable to the present invention.

FIG. 11 is a perspective view showing still another example of a hinge applicable to the present invention.

FIG. 12 is a perspective view showing still another example of a hinge applicable to the present invention.

FIG. 13 is a perspective view showing an example of a hinge pin applicable to the present invention.

FIG. 14 is a perspective view showing another example of a hinge pin applicable to the present invention.

FIG. 15 is a perspective view showing an example of a hole of a hinge applicable to the present invention.

FIG. 16 is a perspective view showing still another example of a hinge pin applicable to the present invention.

FIG. 17 is a longitudinal sectional view of a pin of the hinge.

FIG. 18 is a perspective view showing still another example of the hole of the hinge applicable to the present invention.

FIG. 19 is a longitudinal sectional view showing still another example of a hinge pin applicable to the present invention.

FIG. 20 is a perspective view showing still another example of a hinge hole applicable to the present invention.

FIG. 21 is a front view showing still another embodiment of the image forming apparatus according to the present invention.

FIG. 22 is a front view showing still another example of a hinge pin applicable to the present invention.

FIG. 23 is a front view showing still another example of a hinge applicable to the present invention.

FIG. 24 is a front view showing still another example of a hinge pin applicable to the present invention.

FIG. 25 is a front view showing still another example of a hinge applicable to the present invention.

[Explanation of symbols]

 Reference Signs List 101 Image reading section 111 Image forming section 130 Anti-vibration rubber 141 Hinge member 142 Pin section 143 Pin 146 Hole 147 Hole section

Claims (6)

[Claims] In an image forming apparatus having an image reading unit for reading a document image and an image forming unit for forming an image based on the read image data, the image reading unit is located above the image forming unit, and The image reading unit is connected to the image forming unit by a hinge member, and the image reading unit is rotatable and openable above the image forming unit. An anti-vibration rubber is provided between the image reading unit and the image reading unit. An image forming apparatus having a clearance between a pin of a pin of a hinge member and a hole of a hole in which the pin is fitted when the hinge is placed above the image forming unit. 2. The invention according to claim 1, wherein, when the hinge member has a pin portion on the image reading portion side and a hole portion on the image forming portion side, a center position of the pin of the pin portion on the image reading portion side is:
An image forming apparatus characterized by being set at a position higher than a center position of a hole in a hole on an image forming unit side. 3. The image forming apparatus according to claim 1, wherein, when the hinge member is a hole on the image reading unit side and a pin part on the image forming unit side, the center position of the hole in the hole on the image reading unit side is the image forming unit. An image forming apparatus characterized in that the image forming apparatus is set at a position higher than the center position of the pins of the pin portion on the side of the unit. 4. An image forming apparatus comprising: an image reading unit for reading a document image; and an image forming unit for forming an image based on the read image data, wherein the image reading unit is located above the image forming unit. The image reading unit is coupled to the image forming unit by a hinge member, the image reading unit is rotatable and openable above the image forming unit, and the hinge member is attached to the image reading unit or the image forming unit via an anti-vibration rubber. An image forming apparatus. 5. An image forming apparatus comprising: an image reading unit for reading a document image; and an image forming unit for forming an image based on the read image data, wherein the image reading unit is located above the image forming unit. The image reading unit is coupled to the image forming unit by a hinge member, and the image reading unit is rotatable and openable above the image forming unit, and a vibration isolating rubber is provided on a sliding portion of a pin or a hole of the hinge member. An image forming apparatus comprising: 6. The invention according to claim 5, wherein a sliding surface of the hinge member formed of a vibration-proof rubber member is coated with a material having a low friction coefficient, or the sliding portion of the hinge member has a low friction coefficient. An image forming apparatus, wherein the image forming apparatus is integrally formed of a material.