JPH07219067A - Image forming device - Google Patents

Abstract

PURPOSE:To prevent a highly acurate member from being deformed by vibration and impact at the time of transporting an image forming device by fixing two movable scanner bodies to a machine body by 1st and 2nd fixing members. CONSTITUTION:This device is provided with the 1st fixing member 12 fixing a 1st scanner 3, and the 2nd fixing member 13 fixing a 2nd scanner 4 and the 1st fixing member 12. In a state where the 1st fixing member 12 is attached, the 1st fixing member 12 and the 2nd scanner 4 are fixed by the 2nd fixing member 13. Namely, the screw shaft part 13a of the 2nd fixing member 13 passes through the round hole 12c bored on the abutting piece part 122 of the 1st fixing member 12 from the outside of a machine body 10, a round hole 15b of cover 15 and a round hole 14b of frame body 14, and is inserted into the machine body 10 to be screwed in a screw hole 41a formed on the back surface of the supporting base 41 of the 2nd scanner 4. Thus, the 2nd scanner 4 is fixed, and the falling prevention of the 1st member 12 is guaranteed.

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 such as a copying machine, and more particularly to an apparatus having a movable scanning optical system.

[0002]

2. Description of the Related Art Conventionally, in an image forming apparatus having a scanning optical system 102 as shown in FIG. 2, various types of devices are prevented from being damaged by vibrations, impacts or the like caused by transportation after completion of a factory. The packaging protects the aircraft.

Particularly, the scanning optical system 102 composed of the first scanner 103, the second scanner 104, etc. is a portion which requires a highly accurate operation and is easily affected by vibration, impact, etc. It is important to protect from impact.

Particularly, in the scanning optical system called the double-sided drive system as shown in FIG. 6, the first scanner 103,
The second scanner 104 includes guide rails 120 and 121.
Since the position is maintained only by the tension of the two wires 105 and 106 on the top, it is very susceptible to vibration and impact. When the first and second scanners 103 and 104 are moved or displaced in an unnatural direction by these external effects, the components are deformed and worn, and the optical performance of the machine body is disturbed.

Therefore, during transportation or the like, conventionally, as shown in FIG. 7, the second scanner 104 is fixed by inserting the scanner fixing member 107 from the outside of the machine body so that the fixing member 107 does not come off. It was fixed to the machine exterior cover with adhesive tape 108.

The scanner fixing member 107 hooks the slit 111 of the tip hook portion into the opening 110 formed in the frame 109 while the second scanner 104 is stopped at the home position. It prevents movement (see Figure 6).

When the machine body is in use, the fixing of the scanner is released by peeling the tape 108 and removing the fixing member 107 as shown in FIG.

[0008]

However, the above-mentioned conventional example has the following problems.

(1) The second scanner 104 includes the lens 1
Due to variations in the focal length of 12 and variations in the precision of the parts of the wires 105, 106, etc., the stop position at the home position varies from machine to machine.

Therefore, it is necessary to set the width b of the slit 111 of the hook portion of the scanner fixing member 107 to be wide to some extent, and thus the second scanner 104 cannot be completely fixed.

(2) Further, since the first scanner 103 is not fixed, the first scanner 103 is not affected by vibration or the like.
Is unavoidable, and in addition to the influence on the first scanner 103 itself, the influence on the second scanner 104 in the connected state of the wires 105 and 106 also occurs.

(3) Further, the fixing member 107 guarantees the mounting state by retaining the adhesive tape 108, but the guarantee of the mounting position is unstable, and when the adhesive tape 108 is peeled off, Adhesive may remain on the cover of the machine and stain it.

The present invention has been made to solve the above-mentioned problems of the prior art, and the object thereof is to:
An object of the present invention is to provide an image forming apparatus provided with a fixing member for a moving scanning body that can reliably fix two moving scanning bodies with a simple structure.

[0014]

In order to achieve the above object, the present invention provides an image forming apparatus having a scanning optical system composed of two moving scanning members, one moving scanning member being an image forming apparatus. And a second fixing member for fixing the other moving scanning body and the first fixing member.

Further, the first fixing member and the second fixing member are inserted from the outside to the inside of the machine body, and can be locked to the moving scanning bodies at the inserting portions of the respective fixing members into the machine body. And a portion outside the machine body of the first fixing member is fixed to the machine body using the second fixing member.

It is preferable that the second fixing member is position-adjustable for adjusting the fixed position of the movable scanning member.

It is preferable that the locking portion of the second fixing member is constituted by a screw shaft portion screwed into the moving scanning body, and the fixed position of the moving scanning body can be adjusted by the screwing amount.

The locking portion of the first fixing member is effective in the case of being configured to be engaged with and disengaged from the moving scanning body by moving in the lateral direction with respect to the inserting direction.

[0019]

In the present invention, one of the two moving scanning members is fixed by the first fixing member, and the other moving scanning member is fixed by the second fixing member, and particularly the first moving member is fixed. The fixing member is integrally fixed to the body of the image forming apparatus by the second fixing member.

This prevents the two movable scanning bodies from moving within the body against vibrations and impacts of the body during transportation and prevents abnormal deformation and wear caused by the movement.

Further, since the first fixing member is fixed by using the second fixing member for fixing the moving scanning member, the first fixing member is fixed as compared with the conventional case where the fixing position guarantee adhesive tape is used. The fixed position of the first fixing member can be reliably ensured, and an adhesive tape is not required.

In particular, the first fixing member and the second fixing member can be surely secured by the first fixing member even when the fixing position cannot be seen from the outside because the first fixing member and the second fixing member are inserted from the outside to the inside.

If the second fixing member is positionally adjustable to adjust the fixed position of the moving scanning body, it is possible to deal with the case where the fixed position of the moving scanning body varies.

If the locking portion of the second fixing member is constituted by the screw shaft portion, if the fixed position of the moving scanning member can be adjusted by the screwing amount, the adjustment can be facilitated.

If the locking portion of the first fixing member is moved laterally with respect to the insertion direction so as to be engaged with and disengaged from the moving scanning member, the first fixing member can be fixed by the second fixing member. The position of the fixed member 1 can be confirmed, and the fixed position can be more reliably guaranteed.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments.

FIG. 4 shows the entire image forming apparatus according to one embodiment of the present invention. The image forming apparatus 1 is a scanning optical system having movable first and second scanners 3 and 4 as moving scanning bodies. Equipped with system 2.

First, the image forming process of the image forming apparatus 1 will be briefly described. In the illustrated example, the image of the original O is copied by a known electrostatic photography process.
0 surface is uniformly charged by a charger 51, the optical image of the document O is exposed on the surface by the exposure optical system 52 to form an electrostatic latent image, and the electrostatic latent image is developed by the developing device 52. To form a toner image, and transfer the toner image to the transfer device 53.
The residual toner on the surface of the photoconductor drum 50 is removed by the cleaner 54.

The exposure optical system 51 includes the scanning optical system 2 before the imaging lens 56 and the fixed optical system 57 after the imaging lens 56.
And have.

The first scanner 3 of the scanning optical system 2 includes an exposure lamp 32 for illuminating the surface of a document on a support 31, and a first mirror 33 for reflecting an optical image of the illuminated document on a predetermined optical path.
Is a movable scanning body supporting the second scanner 4
Is the two second, third, and right-angled arrangements in which the reflected light image from the first scanner 3 is folded back to the imaging lens 56 side on the abutment 41.
It is a movable scanning member that supports mirrors 42 and 43.

The first and second scanners 3 and 4 are moved by the pair of rails 20 and 21 in parallel with the original while maintaining parallel to each other and in a direction orthogonal to the drum axis of the photosensitive drum 50. Therefore, the second scanner 4 moves at half the speed of the first scanner 3 and moves while keeping the optical path length from the document surface to the imaging lens constant. The first and second scanners 3 and 4 are driven by a wire drive system, and particularly, in this embodiment, a double-sided wire drive system in which wire drive mechanisms are provided on both sides is illustrated.

Regarding the wire drive mechanism, the winding drums 5a and 6a for winding the left and right wires 5 and 6, the drive motor 6b for rotationally driving the winding drums 5a and 6a, and the orbits of the wires 5 and 6 are defined. The fixed pulleys 5c and 6c, the movable pulleys 5d and 6d constituting the moving pulley, and the springs 5e and 6e for applying tension are provided. In the illustrated example, there is one drive motor 6b, and the left and right take-up drums 5a, 6
A is directly connected by a connecting shaft 5b so that both winding drums 5a and 6a are rotationally driven in synchronization. Then, by fixing the end portions or the middle portions of the wires 5 and 6 to the first scanner 3 and fixing the movable pulleys 5d and 6d to the second scanner 4, the second scanner 4 is set to the first scanner 1.
The scanning movement is performed at a speed of / 2.

In this system, the positions of the first and second scanners 3 and 4 on the guide rails 20 and 21 are maintained only by the tension of the two wires 5 and 6.

Further, the fixed optical system 57 includes an image forming lens 56.
And the fixed third, fourth, and fifth mirrors 58, 59, 60 arranged in the optical path between the photosensitive drum 50 and the photosensitive drum 50.

The recording material P such as paper is stored in the two-stage cassette 61,
62 or manual feed tray 63 to feed rollers 64, 6
The sheets are separated and fed by 5, 66, and the recording material P is temporarily stopped by the registration roller pair 67 in front of the photosensitive drum 50, and is fed to the transfer portion in synchronization with the image on the photosensitive drum 50. After the toner image is transferred, the transport unit 6
After being conveyed to the fixing section 69 through 8 and fixed, the sheet is discharged onto the sheet discharge tray 71 by the sheet discharge roller 70.

In the illustrated example, the return conveyance path 7 for returning the recording material P discharged from the fixing section 69 to the registration roller pair 67.
2 is provided, and the position of the flapper 73 is changed according to each copy mode of normal copy, double-sided copy, or multiplex copy.

According to the present invention, the above-mentioned first and second scanners 3 and 4 are fixed at the time of transportation or the like, and the first fixing member 12 for fixing the first scanner 3 on one side and the second scanner on the other side are fixed. 4 and the second fixing member 13 for fixing the first fixing member 12 to each other.

The fixed positions of the first and second scanners 3 and 4 are fixed at the home positions of the first and second scanners 3 and 4, and as shown by the dotted line in FIG. This is the position when the aircraft body 1 of No. 1 comes to the left end in the drawing.

The first fixing member 12 for fixing the first scanner 3 is a plate member bent in a substantially L shape, and has an opening 14a formed through a frame body 14 and a cover 15 which constitute the machine body 10 of the image forming apparatus. An insertion piece 121 that is inserted from the outside of the device into the inside of the device through 15a, and an abutment part 122 that is located outside the machine body 10 and contacts the outer wall surface of the cover 15.
Composed of.

At the tip of one side edge of the insertion piece 121,
The vertical wall 3 standing upright on the rear surface of the abutment 31 of the first scanner 3.
A slit 12a is provided as a locking portion for locking the locking opening 31a formed in the frame 11, and a corner portion with the abutting piece 122 is provided on the inner wall surface of the frame body 14 constituting the machine body 10. An abutting portion 12b that is abutted is formed.

That is, the insertion piece portion 121 has a front end portion 121a ahead of the slit portion 12a and the slit portion 12a.
It is divided into three parts: a middle part 121b between a and the abutting part 12, and a root part 121c from the abutting part 12 to the corner part. The side edge of the midway portion 121b projects a predetermined dimension in a T-shape toward the opening direction side of the slit portion 12a from the side edges of the tip portion 121a and the root portion 121c, and the protruding portion on the frame body 14 side. End is abutting part 12
b, the end portion 12c on the side of the first scanner 3 extends continuously to one side of the slit portion 12a and is in contact with the rear vertical wall 311 of the first scanner 3.

On the other hand, the second fixing member 13 has an opening 12c formed in the abutting piece 122 of the first fixing member 12, and an opening 15b penetratingly formed in the cover 15 and the frame body 14 constituting the machine body 10. , 14b, and a screw shaft portion 13a screwed into the back surface of the second scanner 4 and a screw shaft portion 13a.
And a knob portion 13b which is integrally provided at the outer end of the first fixing member 12 and contacts the contact piece portion 122 of the first fixing member 12.

FIG. 2 shows a mounting state of each member.

The insertion piece 121 of the first fixing member 12 is inserted through the insertion openings 15a, 14a of the cover 15 and the frame body 14, and the slit 12a thereof is the locking opening of the abutment 31 of the first scanner 3. It is engaged with the rim of 31a.

Locking opening 3 formed in the first scanner 3
1a is a first opening 31b having a wide vertical width into which the tip 121a of the insertion piece 121 is inserted, and one side edge (left side edge in the illustrated example) of the first opening 31b further laterally. And a narrow second opening portion 31c that extends,
The boundary between the first opening portion and the second opening portion is inclined and narrowed so as to be gradually narrowed laterally so as to serve as a guide for locking the slit portion.

To insert the first fixing member 12, first,
Insert the tip 121a of the insertion piece 121 into the first opening 31b.
After that, the slit portion 12a is inserted into the side edge of the opening by shifting it toward the second opening 31c side. As a result, the first scanner 3 is sandwiched in the front and rear by the tip 121a of the insertion piece 121 of the first fixing member 12 and the midway portion 121b to be prevented from moving and fixed.

The position of the slit portion 12a of the insertion piece portion 121 is positioned by the contact piece portion 122 that abuts the outer wall surface of the cover 15. The position of this slit portion 12a is
Locking opening 3 of the first scanner 3 in the home position
It is set according to the position of 1a. Since the home position of the first scanner 3 is smaller than that of the second scanner 4, the width of the slit portion 12a should be set to be substantially the same as the thickness of the vertical wall 311 on the rear surface of the abutment 31 of the first scanner 3. Therefore, the first scanner 3 can be securely fixed without rattling when fixed.

With the first fixing member 12 attached, the second fixing member 13 fixes the first fixing member 12 and the second scanner 4.

That is, the screw shaft portion 1 of the second fixing member 13
3a is a round hole 12c provided in the abutting piece 122 of the first fixing member 12 from the outside of the machine body 10 and a round hole 15 of the cover 15.
It is inserted into the inside of the machine body 10 through b and the round hole 14b of the frame body 14, and is screwed into the screw hole 41a formed on the back surface of the abutment 41 of the second scanner 4.

As a result, the second scanner 4 is fixed and the first fixing member 12 is prevented from coming off.

The second fixing member 13 is screwed into substantially the center of gravity of the second scanner 4, and the screwing amount is adjusted in accordance with the position of the second scanner 4, so that the second scanner 4 is fixed without play, and The fixing member 12 is fixed to the machine body. That is, due to variations in the focal length of the imaging lens 56 and variations in the parts accuracy of the wires 5, 6, etc.,
Although the stop position of the second scanner 4 at the home position varies depending on the machine body, the variation can be absorbed by adjusting the screwing amount.

Here, when the first fixing member 12 is not mounted at the proper position, the round hole 12 of the abutting piece 122 thereof.
Since c does not coincide with the round hole 15b of the cover 15 and the second fixing member 13 cannot be attached, the first fixing member 1
The mounting failure of No. 2 can be found, and the mounting of the first fixing member 12 can be ensured.

When removing the second fixing member 13,
After removing the first fixing member 1 by the procedure reverse to the above procedure.
Remove 2.

[0054]

As described above, by fixing the two movable scanning bodies to the machine body by the first and second fixing members, both of the two movable scanning bodies can be fixed by a simple means. It is possible to reliably prevent deformation of these highly accurate members against vibration and shock during transportation.

Since the mounting position of the first fixing member is ensured by the second component member, it is possible to prevent work mistakes and the like. Further, unlike the conventional case, the adhesive tape for guaranteeing the fixed position is not required, and the adhesive does not adhere and become dirty.

In particular, even when the fixing state is not visible, as in the case of inserting the fixing member from the outside of the machine and fixing it, the mounting position of the first fixing member is guaranteed, so that the fixing member can be surely fixed.

If the fixed position is adjustable,
Even for a movable scanning body having variations in the stop position, the movable scanning body can be fixed correspondingly to the stop position without rattling, so that the deformation of the movable scanning body can be prevented.

If the position is adjusted by the screwing amount of the screw shaft portion, the adjustment can be performed easily and precisely.

Further, if the engaging portion of the first fixing member is moved laterally with respect to the insertion direction so as to be engaged with and disengaged from the moving scanning body, the first fixing member is fixed to the second fixing member when fixed. The position of the fixing member 1 can be surely confirmed.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of essential parts showing a fixed state of first and second scanners of an image forming apparatus according to an exemplary embodiment of the present invention.

FIG. 2 is a sectional view of the first and second scanners of FIG. 1 in a fixed state.

FIG. 3 is a schematic perspective view showing an overall configuration of the first and second scanners of FIG.

4 is an overall configuration diagram of an image forming apparatus to which the first and second scanners of FIG. 1 are applied.

FIG. 5 is a perspective view of essential parts showing a fixed state of a scanner of a conventional image forming apparatus.

FIG. 6 is a schematic perspective view showing the overall configuration of a scanner of a conventional image forming apparatus.

FIG. 7 is an overall configuration diagram of a conventional image forming apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2 Scanning optical system 3 1st scanner (moving scanning body) 31 Abutment 31a Locking opening 31b 1st opening 31c 2nd opening 4 2nd scanner (moving scanning body) 5,6 Wire 10 Machine body 12 1st fixing member 121 Inserting piece part 122 Abutting piece part 12a Slit part (locking part) 12b Abutting piece part 12c Round hole 13 Second fixing member 13a Screw shaft part (locking part) 13b Knob part 14 Frame body 15 Exterior cover

Claims (5)

[Claims] 1. An image forming apparatus having a scanning optical system composed of two moving scanning members, wherein one moving scanning member is fixed to a body of the image forming apparatus.
And a second fixing member for fixing the other moving scanning body and the first fixing member. 2. A first fixing member and a second fixing member are inserted from the outside of the machine into the inside of the machine. Locking is possible at each insertion part of the fixing member into the machine so that each movable scanning body can be locked. The image forming apparatus according to claim 1, further comprising a portion, wherein a portion of the first fixing member outside the machine body is fixed to the machine body by using the second fixing member. 3. The image forming apparatus according to claim 1, wherein the second fixing member is positionally adjustable to adjust the fixed position of the moving scanning body. 4. The image forming apparatus according to claim 3, wherein the locking portion of the second fixing member is constituted by a screw shaft portion screwed into the moving scanning body, and the fixed position of the moving scanning body can be adjusted by the screwing amount. . 5. The image forming apparatus according to claim 3, wherein the locking portion of the first fixing member is configured to be disengaged from the moving scanning member by moving in a lateral direction with respect to the insertion direction.