JP2004274651A - Image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of effectively avoiding occurrence of distortion in an optical frame and reducing the weight of a box shaped structure and decreasing the cost with a simple configuration even when the flatness of a mount of a main body frame side is not sufficiently maintained. <P>SOLUTION: Mount bases 35, 36 for supporting an image read section 12 are provided at both left and right ends of an upper face 16a of the main body side frame 16 of the image forming apparatus, and an adjustment member 37 is provided on a front end part 35a of the mount base 35. The height of the adjustment member 37 can be adjusted to thereby adjust the height of the front end part 35a of the mount base 35. After the adjustment, the image read section 12 is mounted on the mount bases 35, 36 from a side of a bottom face 17a of the optical frame 17 formed with support members 17b to 17e and fixed to the main body side frame 16. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a digital copier, an image scanner, and a facsimile, which requires high image quality. Regarding the mechanism.
[0002]
[Prior art]
An image reading apparatus to be mounted on an image forming apparatus generally has an optical system carriage having a light source, a mirror, and the like, and by moving the optical system carriage in the sub-scanning direction within an optical frame that is a box-shaped structure. The image of the document is read by an image sensor such as a CCD. The box-shaped structure has a hollow shape for moving the optical system carriage inside. Therefore, a reinforcing member for ensuring the mechanical strength and rigidity of the box-shaped structure cannot be arranged in the space in the optical frame that is the box-shaped structure, and the space around the box-shaped structure cannot be provided. The structure must ensure mechanical strength and rigidity.
[0003]
Here, in order to secure these mechanical strengths and stiffness only around the box-shaped structure, it is necessary to devise a structure, but with the conventional structure, the mechanical strength and stiffness tend to be insufficient. Had become.
[0004]
In addition, when the optical frame is mounted on the image forming apparatus main body side, if the flatness of the mounting portion on the main body frame side is not sufficiently maintained, the optical frame is likely to be distorted. Here, when the optical system carriage moves in the sub-scanning direction in the optical frame, it moves on the upper surface of the rail laid in the optical frame. Therefore, when the optical frame is distorted, it guides the optical system carriage. The rail surface is also distorted, which affects the accuracy of the read image signal. As a result, the quality of an image formed based on the image signal is adversely affected.
[0005]
Here, in order to solve these problems, for example, a side plate of the box-shaped structure, which is a constituent member of the box-shaped structure, and a stay coupled in a direction orthogonal to the side plate are formed in a pipe shape. Further, an image reading device in which the rigidity of the optical frame is increased is disclosed. In this image reading apparatus, since the rigidity of the box-shaped structure is improved by increasing the resistance to the external load of the box-shaped structure, the flatness of the mounting portion on the body frame side is sufficiently ensured. Even if the image signal is not read, it is possible to effectively avoid the occurrence of distortion in the optical frame, and as a result, to improve the accuracy of the read image signal and to improve the quality of an image formed based on the image signal. (For example, see Patent Document 1).
[0006]
[Patent Document 1]
JP-A-11-112700 (pages 3-4, FIG. 1-5)
[0007]
[Problems to be solved by the invention]
However, in the above-described image reading apparatus, although the rigidity of the box-shaped structure can be improved, the configuration of the box-shaped structure is complicated because a special constituent member formed in a pipe shape must be provided. Therefore, there is a problem that the weight of the box-shaped structure increases and the cost increases. Further, since these special members must be joined by spot welding, there is a problem that the manufacturing process becomes complicated.
[0008]
The present invention solves the above-described problems, and can effectively avoid the occurrence of distortion in the optical frame with a simple configuration, even when the flatness of the mounting portion on the main body frame side is not sufficiently maintained. It is another object of the present invention to provide an image forming apparatus capable of reducing the weight of a box-shaped structure and reducing the cost.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an image reading unit which reads an original by moving an optical system unit having a light source, a mirror, and the like in an optical frame formed of a box-shaped structure in a sub-scanning direction. In the image forming apparatus to be mounted, the image forming apparatus body side frame on which the image reading unit is mounted is provided with a mounting portion for supporting the optical frame, and the mounting portion has at least one height of the mounting portion. An adjustment means for adjusting the distance is provided.
[0010]
According to the present invention, there is provided an image forming apparatus in which an image reading unit for reading a document by moving an optical system unit having a light source, a mirror, and the like in a sub-scanning direction in an optical frame including a box-shaped structure is mounted. The image forming apparatus body side frame on which the image reading unit is mounted is provided with a mounting portion for supporting the optical frame, and by sliding the mounting portion substantially parallel to the optical frame, the height of the mounting portion is reduced. It is characterized by adjusting.
[0011]
In this case, the surface of the mounting portion that comes into contact with the support member formed on the optical frame can be formed in a step shape, so that the height of the mounting portion can be adjusted stepwise.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram illustrating an entire configuration of an image forming apparatus according to a first embodiment of the present invention.
[0013]
As shown in FIG. 1, the image forming apparatus 1 is a copying machine that forms an image by reversal development. The image forming apparatus 1 stores a photosensitive drum 2 that rotates in one direction (A direction in the figure) and a sheet. A plurality of paper feed cassettes 3, a paper feed unit 4 disposed above each end of the paper feed cassettes 3, and supplying paper toward the photosensitive drum 2, facing the photosensitive drum 2, and The charging unit 5, the developing unit 6, the transfer unit 7, and the cleaning unit 8, which are disposed along the rotation direction of the drum 2, the fixing unit 9 that receives a sheet from the transfer unit 7, and the sheet that is received from the fixing unit 9 A discharge unit 10 that discharges a sheet to the outside of the image forming apparatus 1, a document conveying unit 11 that is disposed above the image forming apparatus 1 and conveys a copy document, and is disposed below the document conveying unit 11. And an image reading section 12 for reading an image of a copy document.
[0014]
Under such a configuration, the copy original is transported to the image reading unit 12 by the original transport unit 11, and the image of the copy original is read by the image reading unit 12, and the surface of the photosensitive drum 2 is also It is uniformly charged by the charging unit 5. Next, light based on the image read by the image reading unit 12 is applied to the surface of the photosensitive drum 2 by an optical unit (not shown) to form an electrostatic latent image of the image. The toner is attached to the electrostatic latent image to form a toner image.
[0015]
Further, the paper stored in the paper cassette 3 is supplied between the photosensitive drum 2 and the transfer unit 7 by the paper supply unit 4 via the paper supply path 21, and then the photosensitive unit is transferred by the transfer unit 7. The toner image is drawn from the drum 2 onto the paper and transferred. Thereafter, the sheet on which the toner image has been transferred is separated from the photosensitive drum 2, and is conveyed to the fixing unit 9 via the sheet conveying path 22, where the toner image is fixed on the transfer sheet.
[0016]
On the other hand, after the transfer of the toner image by the transfer unit 7, the toner remaining on the surface of the photosensitive drum 2 is completely removed by the cleaning unit 8. Then, the photosensitive drum 2 from which the residual toner has been removed, the residual charge on the surface thereof is removed by a charge removing unit (not shown) composed of a plurality of LEDs and the like, and reaches the charging unit 5.
[0017]
A first branching claw 13 is provided immediately after the fixing unit 9 in the sheet carrying-out path 23. The first branch claw 13 is connected by a solenoid (not shown) or the like, and controls the first branch claw 13 by operating or not operating the solenoid, thereby switching the paper transport path. That is, the transfer sheet on which the toner image is fixed is discharged as it is to the outside of the image forming apparatus 1 by the discharge unit 10 along the paper discharge path 23 or the reverse path 15 provided below the first branch claw 13. Is switched by the first branch claw 13.
[0018]
The reversing path 15 is provided with a transport roller 54 and a guide roller 54a, and on the downstream side in the transport direction of the reversing path 15, a duplex unit 14 for reversing and transporting the transfer paper on which the toner image is fixed along the transport path. Is provided. The duplex unit 14 includes a reversing roller 50 for reversing and transporting the transfer paper, and a guide roller 50a.
[0019]
The transfer paper reversely conveyed by the reversing roller 50 and the guide roller 50a is moved by the second branch claw 24 to either the first return path 25 or the second return path 26 on the downstream side in the transport direction of the duplex unit 14. Crab is branched. The switching of the second branch claw 24 is performed by a solenoid (not shown) or the like, like the first branch claw 13.
[0020]
As shown in FIG. 1, since the second return path 26 communicates with the paper carry-out path 23, printing is performed only on the front side of the paper, and the printed side is turned upside down (opposite to the printed side). When the transfer paper exiting the fixing unit 9 is to be discharged, the transfer paper exits from the reversing path 15, passes through the duplex unit 14, passes through the second return path 26, and returns to the paper discharge path 23. Then, the first and second branch claws 13 and 24 are operated.
[0021]
On the other hand, since the first return path 25 communicates with the paper supply path 21, when printing on both sides of the paper is desired, the transfer paper exiting the fixing unit 9 is provided from the reverse path 15 to the duplex unit 14. The first and second branch claws 13 and 24 are operated so as to pass through the first return path 25 and return to the sheet supply path 21 via the sheet feeding unit 4. The sheet that has returned to the sheet supply path 21 is again supplied between the photosensitive drum 2 and the transfer unit 7, and then the transfer unit 7 draws a toner image from the photosensitive drum 2 onto the back surface of the sheet. Transcribed. Thereafter, the sheet on which the toner image has been transferred is separated from the photosensitive drum 2 and is conveyed to the fixing unit 9 via the sheet conveying path 22, and the fixing unit 9 fixes the toner image on the back surface of the sheet. .
[0022]
FIG. 2 is a schematic diagram illustrating the entire configuration of the image reading unit in the image forming apparatus according to the first embodiment of the present invention. In the image reading unit 12, an original platen glass 18 is provided on an upper surface of an optical frame 17 made of a box-shaped structure. Inside the optical frame 17, an original 19 placed on the original platen glass 18 is illuminated. A light source 20 for illuminating the original by irradiating the light, a first optical system unit 28 including a first mirror 27 for reflecting the irradiation light reflected by the original 19 in the 90-degree direction, and reflection by the first mirror 27 A second optical system unit 31 including a second mirror 29 that reflects light in a 90-degree direction and a third mirror 30 that further reflects light reflected by the second mirror 29 in a 90-degree direction is provided.
[0023]
An imaging lens 32 and a CCD unit 33 on which a CCD 34 is mounted are provided inside the optical frame 17, and the reflected light from the document 19 reflected by the third mirror 30 faces the CCD 34. The light is converged by the imaging lens 32 provided, and enters the CCD 34 via the imaging lens 32 to form an image on the CCD 34.
[0024]
Here, in the above configuration, the imaging lens 32 and the CCD 34 are fixed to the optical frame 17. However, even if the light source 20 moves, the light source 20 and the second A first optical unit 28 composed of one mirror 27 and a second optical unit 31 composed of a second mirror 29 and a third mirror 30 are respectively provided on the upper surface of a rail (not shown) laid in the optical frame 17. The first and second optical system units 28 and 31 are moved in the sub-scanning direction in the optical frame 17 so that the original 19 is read. It has a configuration.
[0025]
Next, with reference to the drawings, a description will be given of a mechanism for mounting the image reading unit to the image forming apparatus main body in the image forming apparatus according to the first embodiment of the present invention. FIG. 3 is a perspective view showing a schematic configuration of an image forming apparatus main body side frame to which an image reading unit is mounted in the image forming apparatus according to the first embodiment of the present invention, and FIG. FIG. 4 is a perspective view illustrating an external configuration of an image reading unit in the image forming apparatus according to the embodiment.
[0026]
As shown in FIG. 3, at the left and right ends of the upper surface 16 a of the image forming apparatus main body side frame 16, a mounting base 35 for supporting the image reading unit 12 when the image reading unit 12 is mounted on the main body side frame 16, An adjusting member 37 is provided at a front end 35 a of the mounting base 35. This adjusting member is formed of, for example, an elastic body such as rubber or a resin. On the other hand, as shown in FIG. 4, support members 17b to 17e made of an elastic body such as rubber are formed at four ends of the bottom surface 17a of the optical frame 17 constituting the image reading section 12.
[0027]
When the image reading unit 12 is mounted on the main body side frame 16, as shown in FIG. 3, the image reading unit 12 is mounted on the mounting base 35 from the bottom surface 17 a side of the optical frame 17 on which the support members 17 b to 17 e are formed. The mounting bases 35 and 36 support the optical frame 17 by being placed on the optical frame 17. That is, of the support members 17b to 17e, the support member 17b contacts the adjustment member 37 provided at the front end 35a of the mounting base 35, and the support member 17c contacts the rear end 35b of the mounting base 35, The optical frame 17 is supported by the mounts 35 and 36 by the contact 17d contacting the rear end 36b of the mount 36 and the support member 17e contacting the front end 36a of the mount 36. .
[0028]
Here, the adjusting member 37 is for adjusting the height of the front end 35a of the mounting base 35 provided with the adjusting member 37 that comes into contact with the support member 17b. In other words, the optical frame 17 is supported by four positions of the front end portion 35a and the rear end portion 35b of the mounting base 35 and the front end portion 36a and the rear end portion 36b of the mounting base 36, and one of the four positions is supported. The height of the front end 35a of the mounting base 35 is adjusted.
[0029]
FIG. 6 is a perspective view for explaining a specific example of the adjusting mechanism of the adjusting member in the image forming apparatus according to the first embodiment of the present invention. As shown in FIG. 6, the adjusting member 37 has a screw portion 38, and the screw portion 38 is inserted into a screw hole 39 formed in the mounting base 35. Then, the height of the adjustment member 37 can be adjusted by rotating the adjustment member 37 in the direction of the arrow 40 in the figure and moving the adjustment member 37 in the vertical direction (the direction of the arrow 41 in the figure). It has a configuration. That is, in the present embodiment, the height of the adjustment member 37 can be adjusted by such a simple configuration.
[0030]
When the image reading unit 12 is mounted on the main body side frame 16, the flatness of the mounting surface (that is, the part that comes into contact with the above-described support members 17 b to 17 e) is ensured to avoid the occurrence of distortion in the optical frame 17. Since it is necessary to adjust the height of the adjustment member 37 to an appropriate position, in the present embodiment, when adjusting the height of the adjustment member 37, a predetermined jig (not shown) is used. use. The jig is provided with, for example, a dial gauge, and the first optical unit 28 and the second optical unit 31 described with reference to FIG. 2 move at a constant speed. The degree of parallelism can be checked. In the present embodiment, first, the jig is used for confirmation, and then the height of the adjustment member 37 is adjusted to the above-described appropriate position. As a specific example in which the height of the adjustment member 37 is adjusted to an appropriate position, FIG. 7 shows a state in which the adjustment member 37 is adjusted in the direction of the arrow 42 in the figure.
[0031]
After adjusting the height of the adjustment member 37 to an appropriate position, the image reading section 12 is mounted on the main body side frame 16 as shown in FIG. Also in this case, as described with reference to FIG. 3, the image reading unit 12 is mounted on the mounting bases 35 and 36 from the bottom surface 17a side of the optical frame 17 on which the support members 17b to 17e are formed. Are supported by the mounting bases 35 and 36. Here, in the present embodiment, since the height of the adjustment member 37 is adjusted to the above-described appropriate position, it is possible to avoid the occurrence of distortion in the optical frame 17.
[0032]
That is, as described in the related art, when the optical frame is mounted on the image forming apparatus main body side in a state where the flatness of the mounting portion provided on the main body side frame is not sufficiently maintained, the optical frame is distorted. Although this is likely to occur, in the present embodiment, the height of the adjusting member 37 provided on the mounting base 35 is adjusted, and the height of the front end 35a of the mounting base 35 among the four places where the optical frame 17 is supported is adjusted. By adjusting the height, it is possible to ensure the flatness of the mounting surface described above.
[0033]
Therefore, when the image reading unit 12 is mounted on the main body side frame 16, even if the flatness of the mounting bases 35 and 36 provided on the main body side frame 16 is not sufficiently maintained, the optical frame 17 is mounted. Since the flatness of the surface can be ensured, generation of distortion in the optical frame 17 can be avoided. As a result, the parallelism of the upper surface of the rail laid in the optical frame 17 can be ensured, so that the first optical unit 28 and the second optical unit 31 can appropriately move on the rail, and the original 19 It is possible to read the image information with high precision and to ensure the quality of the image formed based on the image signal.
[0034]
Further, in the present embodiment, it is only necessary to provide the adjusting member 37 at the front end 35a of the mounting base 35, and it is not necessary to provide a special component for improving the rigidity of the optical frame 17 which is a box-shaped structure. Therefore, the weight of the optical frame 17 can be reduced and the cost can be reduced with a simple configuration. Further, since the structure of the optical frame 17 is simplified, the manufacturing process is simplified.
[0035]
Next, with reference to the drawings, a description will be given of a mechanism for mounting an image reading unit to an image forming apparatus main body in an image forming apparatus according to a second embodiment of the present invention. FIG. 9 is a perspective view showing a schematic configuration of an image forming apparatus main body side frame to which an image reading unit is mounted in the image forming apparatus according to the second embodiment of the present invention, and FIG. FIG. 4 is a side view illustrating a schematic configuration of a mounting base in the image forming apparatus according to the embodiment. The components already described in the first embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted.
[0036]
As shown in FIG. 9, in the present embodiment, the mounting base 35 is provided at one end of the left and right ends of the upper surface 16a of the image forming apparatus main body side frame 16 in the same manner as the first embodiment. However, at the other end of the upper surface 16a, when the image reading unit 12 is mounted on the main body side frame 16, a mounting table 50 for supporting the optical frame 17 and an image reading unit The difference is that a mounting table 51 for supporting the mounting 12 is separately provided. The mounting base 51 is provided in place of the adjusting member 37 provided at the front end 35a of the mounting base 35 in the first embodiment, and is formed of, for example, an elastic body such as rubber or resin. Have been. As shown in FIG. 9, the mounting table 51 has an upper surface 52 formed in a stepped shape (four steps in FIG. 9), and the upper surface 52 is formed by four surfaces 52a to 52d. . Also, as shown in FIG. 10, these four surfaces 52a to 52d are formed at the same pitch A (for example, 0.1 to 0.5 mm).
[0037]
When the image reading unit 12 is mounted on the main body side frame 16, the image reading unit 12 is mounted on the mounting tables 35, 50, and 51 from the bottom surface 17 a side of the optical frame 17 on which the support members 17 b to 17 e are formed. By doing so, the mounting bases 35, 50, and 51 are configured to support the optical frame 17. That is, in the present embodiment, of the support members 17b to 17e, the support member 17b contacts the front end 35a of the mounting base 35, the support member 17c contacts the rear end 35b of the mounting base 35, and the support member 17d Is in contact with the rear end portion 50b of the mounting table 50, and the support member 17e is in contact with the upper surface 52 of the mounting table 51, so that the optical frame 17 is supported by the mounting tables 35, 50, and 51. I have.
[0038]
FIG. 11 is a perspective view showing a schematic configuration of a mounting base in the image forming apparatus according to the second embodiment of the present invention, and FIG. 12 is a mounting base in the image forming apparatus according to the second embodiment of the present invention. FIG. 6 is a top view for explaining a specific example of the adjustment mechanism of FIG.
[0039]
As shown in FIGS. 11 and 12, a notch 53 is formed in the mounting base 51, and a screw 54 is inserted into the notch 53. A cutout 56 having a width and a length shorter than that of the cutout 53 is formed on the bottom 55 of the mounting base 51, and a screw 54 is formed on the cutout 56 and the body frame 16 side. The mounting base 51 is locked to the main body frame 16 so as to be movable in the direction of the arrow 57 in FIG. 12 by being inserted into the screw hole 59 (see FIG. 10). It can be slid substantially parallel to the frame 16) (see FIGS. 9 and 10).
[0040]
FIG. 13 is a side view showing a state before adjusting the height of the mounting base in the image forming apparatus according to the second embodiment of the present invention, and FIG. 14 is a view showing the state according to the second embodiment of the present invention. FIG. 7 is a side view illustrating a state after adjusting the height of the mounting base in the image forming apparatus.
[0041]
In the present embodiment, unlike the first embodiment, the image reading section 12 is mounted on the main body side frame 16 before the height of the mounting table 51 is adjusted to an appropriate position. In this case, as described with reference to FIG. 9, the image reading unit 12 is mounted on the mounting tables 35, 50, and 51 from the bottom surface 17 a side of the optical frame 17 on which the support members 17 b to 17 e are formed. The tables 35, 50, and 51 support the optical frame 17, and the support member 17e contacts the upper surface 52 of the mounting table 51 (the surface 52a in FIG. 13). However, as described above, before the height of the mounting table 51 is adjusted to an appropriate position, the image reading unit 12 is mounted on the main body side frame 16, so that at this stage, as shown in FIG. The height of the mounting table 51 (that is, the height of the surface 52a) that comes into contact with the optical frame 17 is not adjusted to an appropriate position for avoiding the occurrence of distortion of the optical frame 17 described in the first embodiment. Since the optical frame 17 is mounted in a state where the flatness of the mounting portions 35 and 51 provided on the main body side frame 16 is not sufficiently maintained, the optical frame 17 is inclined as shown in FIG. In a state where it has been executed.
[0042]
Here, in the present embodiment, as described above, the upper surface 52 of the mounting base 51 is formed in a step-like shape by the four surfaces 52a to 52d, and the mounting base 51 can be slid substantially parallel to the optical frame 17. Therefore, the height of the mounting table 51 can be adjusted stepwise. More specifically, from the state shown in FIG. 13, the mounting table 51 is slid substantially parallel to the optical frame 17 in the direction of the arrow 58, and the surface 52 a of the mounting table 51 with which the support member 17 e contacts is mounted. By changing to the surface 52b that can secure the flatness with the surface 35, the height of the mounting base 51 can be adjusted to an appropriate position.
[0043]
Therefore, even when the image reading unit 12 is mounted on the main body side frame 16 in a state where the flatness of the mounting bases 35, 50, and 51 provided on the main body side frame 16 is not sufficiently maintained, Since the flatness of the mounting surface of the optical frame 17 can be ensured in a state where the tables 35, 50, and 51 support the optical frame 17, a simpler configuration can be obtained in addition to the effects described in the first embodiment. Thus, there is an effect that the operation of adjusting the height of the mounting table 51 to an appropriate position can be easily performed.
[0044]
It should be noted that the present invention is not limited to the above-described embodiment, and it is possible to appropriately change the structure, shape, and the like of each part based on the gist of the present invention, and exclude them from the scope of the present invention. is not.
[0045]
For example, in the first embodiment, the adjusting member 37 is provided only on the front end 35a of the mounting base 35. However, the adjusting member 37 is provided on the mounting bases 35 and 36 that support the optical frame 17 described above. At least one of the four portions may be provided on the mounting bases 35 and 36 so as to adjust the height thereof. For example, instead of the front end 35a of the mounting base 35, a mounting member 37 is provided on the rear end 35b. The front end 35a and the rear end 35b of the mounting base 35, and the mounting base can be adjusted so that the heights of all four positions supporting the optical frame 17 can be adjusted as shown in FIG. A configuration may also be provided at each of four positions of a front end portion 36a and a rear end portion 36b.
[0046]
In the second embodiment, one mounting table 51 is provided on the other end of the upper surface 16a in parallel with the mounting table 50. May be provided on the upper surface 16a of the main body side frame 16 so as to adjust the height of at least one of the four portions of the mounting bases 35, 50, 51 for supporting the optical frame 17, for example. The mounting table 51 may be provided on the upper surface 16a of the main body side frame 16 instead of the mounting tables 35 and 50 so that all of the four positions can be adjusted.
[0047]
Further, in the second embodiment, the upper surface 52 of the mounting table 51 is formed in four steps, but the upper surface is formed in more steps to improve the adjustment accuracy of the height of the mounting table 51. It is good.
[0048]
【The invention's effect】
As described above, according to the present invention, when the image reading unit is mounted on the main body side frame, even when the flatness of the mounting base provided on the main body side frame is not sufficiently maintained, Since the flatness of the mounting surface of the optical frame can be ensured, the occurrence of distortion in the optical frame can be avoided. Therefore, it is possible to read the image information of the document with high accuracy and to ensure the quality of the image formed based on the image signal.
[0049]
Further, in the present embodiment, since it is not necessary to provide a special component for improving the rigidity of the optical frame which is a box-shaped structure, the weight of the optical frame can be reduced and the cost can be reduced with a simple configuration. In addition, since the structure of the optical frame is simplified, the manufacturing process is simplified.
[Brief description of the drawings]
FIG. 1 is a schematic diagram illustrating an entire configuration of an image forming apparatus according to a first embodiment of the present invention.
FIG. 2 is a schematic diagram illustrating an entire configuration of an image reading unit in the image forming apparatus according to the first embodiment of the present invention.
FIG. 3 is a perspective view illustrating a schematic configuration of an image forming apparatus main body side frame to which an image reading unit is mounted in the image forming apparatus according to the first embodiment of the present invention.
FIG. 4 is a perspective view illustrating an external configuration of an image reading unit in the image forming apparatus according to the first embodiment of the present invention.
FIG. 5 is a perspective view illustrating a schematic configuration of a modification of the image forming apparatus main body side frame to which the image reading unit is mounted in the image forming apparatus according to the first embodiment of the present invention.
FIG. 6 is a perspective view for explaining a specific example of an adjusting mechanism of an adjusting member in the image forming apparatus according to the first embodiment of the present invention.
FIG. 7 is a perspective view showing a state after adjusting the height of the adjustment member in the image forming apparatus according to the first embodiment of the present invention. .
FIG. 8 is a perspective view showing a schematic configuration of an image forming apparatus main body side frame to which an image reading unit is mounted in the image forming apparatus according to the first embodiment of the present invention.
FIG. 9 is a perspective view illustrating a schematic configuration of an image forming apparatus main body side frame to which an image reading unit is mounted in an image forming apparatus according to a second embodiment of the present invention.
FIG. 10 is a side view illustrating a schematic configuration of a mount in an image forming apparatus according to a second embodiment of the present invention.
FIG. 11 is a perspective view illustrating a schematic configuration of a mount in an image forming apparatus according to a second embodiment of the present invention.
FIG. 12 is a top view illustrating a specific example of a mounting base adjustment mechanism in an image forming apparatus according to a second embodiment of the present invention.
FIG. 13 is a side view showing a state before adjusting the height of the mounting base in the image forming apparatus according to the second embodiment of the present invention.
FIG. 14 is a side view illustrating a state after adjusting the height of a mounting base in the image forming apparatus according to the second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2 Photoreceptor drum 3 Paper feed cassette 4 Paper feed unit 5 Charging unit 6 Developing unit 7 Transfer unit 8 Cleaning unit 9 Fixing unit 12 Image reading section 16 Main body side frame 17 Optical frames 35 and 36 Mounting base 37 Adjusting member 50, 51 Mounting base 52 Mounting base upper surface 53, 56 Notch 54 Screw

Claims (3)

In an image forming apparatus in which an image reading unit that reads an original is mounted by moving an optical system unit having a light source, a mirror, and the like in a sub-scanning direction in an optical frame including a box-shaped structure,
The image forming apparatus body side frame on which the image reading unit is mounted is provided with a mounting portion for supporting the optical frame, and the mounting portion adjusts at least one height of the mounting portion. An image forming apparatus provided with an adjusting means for the image forming apparatus. In an image forming apparatus in which an image reading unit that reads an original by moving an optical system unit having a light source and a mirror in a sub-scanning direction in an optical frame formed of a box-shaped structure is provided.
The image forming apparatus main body side frame on which the image reading unit is mounted is provided with a mounting portion for supporting the optical frame, and the mounting portion is slid substantially in parallel with the optical frame to thereby form the mounting portion. An image forming apparatus, wherein the height of the image is adjusted. The surface of the attachment portion that contacts a support member formed on the optical frame is formed in a step shape, and the height of the attachment portion is adjustable in a stepwise manner. Image forming apparatus.

Images