JPS6215564A - Image forming device - Google Patents

Abstract

PURPOSE:To prevent a defect in electric contacting from occurring by connecting a developing device in revolving structure to a device body electrically and securely by wiring by connecting electric wires directly. CONSTITUTION:The electric wires 86-89 are in a pulley winding state (a) when, for example, a developing device 14b is selected among 14a-14d and then enters a pulley winding state (c) when rotary frames 37 and 38 are rotated counterclockwise by 90 deg. so as to select the next developing device 14a in the former state. Further, then enter a pulley winding state (d) when the frames are rotated counterclockwise further by 90 deg. so as to select the next developing device 14c. At this time, the electric wires 86-89 which connect the developing device to the device body side 1 directly are held in an invariably excellent wiring winding state so that the electric wires are neither slacked nor tensed between a concentration wiring pulley 85 and distribution wiring pulley 81-84.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image forming apparatus such as a color copying machine that is equipped with a plurality of developing devices containing developers of different colors.

[Technical background of the invention and its problems] Conventionally, a plurality of developing devices containing different color developers are supported on a rotating frame so that they can revolve while being kept in a parallel state. Image forming apparatuses are known in which one of a plurality of developing devices is selected by rotation, and a latent image on an image carrier is developed by the selected developing device (for example, (Japanese Patent Application Laid-Open No. 57-111555).

Such image forming apparatuses require an electrical connection between the main body of the apparatus and the developing device in order to control the developing bias and developer (toner) specific concentration. Since this was done using a connector that slid on the side of the connector, there were problems such as poor electrical contact and abrasion of the connector terminals.

[Objective of the Invention] This invention has been made in view of the above circumstances, and its purpose is to enable electrical connection between the developing unit of the revolving structure and the main body of the apparatus by directly connecting electric wires without using a conventional connector. It is therefore an object of the present invention to provide an image forming apparatus with a new structure that can perform image forming operations reliably and that does not cause problems such as poor electrical contact and wear of connector terminals.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention supports a plurality of developing units containing developers of different colors on a rotating frame so that they can revolve while keeping them in a parallel state, and the rotation of the rotating frame In an image forming apparatus in which one of a plurality of developing devices is selected by the above-described method, and a latent image on an image bearing member is visually imaged by the selected developing device, the drive mechanism of the rotating frame is controlled. The developing device is configured as a forward/reverse rotation drive mechanism in which the developing device does not revolve more than one revolution, and a plurality of distribution wiring pulleys are provided at the end of the rotation shaft of each developing device relative to the one-side rotation frame so as to rotate together with each developing device. one centralized wiring pulley that is rotatably loosely inserted into the central rotating shaft of the rotating frame and fixed so as not to rotate with respect to a support member on one side of the rotating shaft; A plurality of electric wires connected to the current-carrying part pass through the center of the distribution wiring pulley and extend outward from the outer peripheral hole of the distribution wiring pulley, and are connected to the outer periphery of the central wiring pulley according to the forward and reverse rotation angles of the rotating frame. After being wound in a corresponding angular range, the central wiring pulley is passed through the outer peripheral hole of the pulley and connected to the main body of the device.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows an overall configuration diagram of a color copying machine which is an example of an image forming apparatus according to the present invention, in which 1 indicates the copying machine main body;
Reference numeral 2 denotes a document table fixed to the top surface of the main body 1, and an optical system consisting of an exposure lamp 3 and mirrors 4, 5, and 6 reciprocates along the bottom surface of the document table 2 to read the original set on the document table 2. Exposure scanning is performed by moving the camera.

In this case, the mirror 5.6 moves at half the moving speed of the mirror 4 so as to keep the optical path length constant.

The light reflected from the document by the scanning of the optical system (the light reflected from the document by the light irradiation of the n-light lamp 3) is reflected by the mirror 4.
5.6, passes through the lens block 7 for setting the copying magnification, is further reflected by the mirrors 8, 9.10, is guided to the photosensitive drum 12 as an image carrier through the slit 11, and is the image of the original. An image is formed on the surface of the photoreceptor drum 12.

The photosensitive drum 12 rotates in the direction indicated by the arrow, and the surface is first charged by the charger 13, and then the image of the original is exposed to slit light to form an electrostatic latent image. The electric latent image is configured to be visualized by applying a developer (toner) by a developing device 14, which will be described later.

On the other hand, the paper P is taken out one by one from the paper cassette 15 by the paper feed roller 16, guided through the paper guide path 17 to a pair of registration rollers 18, aligned by the registration rollers 18, and transferred to the image transfer section. configured to be sent. The paper feed cassette 15 is detachably provided at the lower right end of the main body 1 of the apparatus.

Then, the paper P sent to the image transfer section is transferred to the transfer charger 19.
By coming into close contact with the surface of the photoreceptor drum 12 at the portion , the toner image on the photoreceptor drum 12 is transferred by the action of the charger 19 . Then, the paper P to which this toner image has been transferred is electrostatically peeled off from the photoreceptor drum 12 by the action of the peeling charger 20 and conveyed by the conveyor belt 21, and the fixing device provided at the end thereof is The transferred image is sent to a device 22 and fixed by passing therethrough. The sheet P after fixing is sent by a pair of transport rollers 23 to a pair of paper ejection rollers 24, and is ejected to a tray 25 outside the apparatus main body 1 by the paper ejection rollers 24. Further, after the photosensitive drum 12 has been transferred, residual toner on the surface thereof is removed by a cleaner 26, and after that, the afterimage is erased by a static elimination lamp 27, and the photosensitive drum 12 returns to its initial state.

A guide selector 28 is provided between the transport roller 23 and the paper discharge roller 24 to switch the traveling direction of the paper P to be transported.
By the operation of this selector 28, the paper P sent by the transport roller 23 during normal copying is guided to the paper ejection roller 24, and during multiple color copying, the paper P is guided to the transport roller 5.
The paper P sent at step 23 is guided through a paper guide path 29 that curves downward.
is guided to a conveyance path 30 provided on the bottom side of the main body 1, conveyed by this conveyance path 30 to the vicinity of the paper feed cassette 15, and then transferred to the registration rollers 18 via an upwardly curved paper guide path 31. It is configured to be sent. That is, during multiple copying, the paper P is circulated as shown by the arrow in the figure.

The developing device 14 includes, for example, four developing devices 14a to 14.
d, and allows each of the developing devices 148 to 14d to revolve while maintaining them in a parallel state (horizontal state) (however, in the case of the present invention, for example, 270 By rotating forward and backward within the revolution range of the rotor, one developing device, for example 14b, can be selected from among the plurality of developing devices 14a to 14d. Further, the developing device 14 is movable in the left-right direction (in the direction of approaching and separating from the photoreceptor drum 12) by a contacting and separating mechanism 50, which will be described later. That is, during the copying operation, as shown in FIG.
When the developing units 14a to 14d are selected, the developing units 14a to 14d are moved to a position a predetermined distance away from the photosensitive drum 12 as shown in FIG. will be held. When this selection operation is completed, the photosensitive drum 12 is moved again, and as shown in FIG.
is set opposite to the photoreceptor drum 12.

The detailed structure of the developing device 14 will be explained in FIGS. 4 to 7 below.
To explain with reference to the drawings, the developing device 14 includes a pair of left and right rotary shaft support members 34 and 35 that swing in the direction of the photoreceptor drum 12 using a support shaft 33 fixed to the device main body 1 as a fulcrum, and The rotating frame 37 includes a rotating shaft 36 supported between members 34 and 35, and a pair of left and right rotating frames 37 and 38 that are fixed to the rotating shaft 36 and rotate integrally about the rotating shaft. Between .degree. 40d, 41a-41d
It is supported by a shaft.

Each of the developer rotation support shafts 40a to 40d supported by the right rotation frame 38 has a planetary pulley 4 at each shaft end.
2a to 42d are attached, and the rotating frame 37
．． A center hole of a sun pulley 42 fixed to the support member 35 is rotatably inserted into the center rotating ring 36 of 38 . between the planetary pulleys 42a and 42b attached to the developer rotation support shafts 40a and 40b and a large circular pulley 42 fixed to the support member Δ5 and loosely inserted to be rotatable with respect to the frame center rotation shaft 36; and a planetary pulley 42 attached to the developer rotation support shafts 40c and 40d.
Between c and 42d and the sun pulley 42, two timing belts 43 and 44 are hung as shown in FIGS. 1 and 7, with the sun pulley and the planetary pulley being assembled on three sides. Note that a drive pulley 4 is attached to the shaft end of the rotating shaft 36.
5 is attached, and between this drive pulley 45 and a pulley 47 attached to the rotating shaft of a reversible motor 46 for revolving the developing device (this motor 46 is fixed to the support member 35 as shown in FIG. 1). A timing belt 48 is attached to the rotating frames 37 and 38, and constitutes a rotational drive mechanism 49 for the rotating frames 37 and 38, in which the developing units 14a to 14d are rotated in forward and reverse directions within a revolution range of, for example, 270 degrees. .

Note that the sun pulley 42 is connected to two timing belts 4.
3.44 as shown in FIG. 1, this sun pulley 42 and each of the planetary pulleys 42a~
42d both have the same outer diameter. Therefore, when the rotating frames 37 and 38 are rotated by the developing device drive mechanism 49, the planetary pulleys 42a to 42d do not rotate on their own axis but revolve within a rotation range of one revolution or less, and therefore each of the developing devices 14a to 42d revolves within a rotation range of one rotation or less. 14d always revolves at the same angle, that is, while maintaining a parallel state, within a rotation range of one rotation or less (in the case of the embodiment, a forward and reverse rotation range of 270 degrees). Such an operation is necessary to control the posture of the developing units 14a to 14d containing powdered developer (toner). Note that, for example, black toner is stored in the first developing device 14a.
The second developing device 14b transfers the red toner to the third developing device 1.
The developing device 4c stores green toner, and the fourth developing device 14d stores blue toner.

Reference numeral 50 shown in FIGS. 4, 5, and 8 indicates the current device 1 which is swingably suspended by the support members 34 and 35.
4 toward and away from the photoreceptor drum 12, and this contact/separation mechanism 50 is constructed as follows. That is, near the lower end of the support member 34, 35,
A pair of left and right arms 51, 52 are arranged substantially at right angles to the support members 34, 35. This arm 5
1.52, an elongated hole 51a along the direction of approaching and separating from the photoreceptor drum 12 is provided at one end located on the photoreceptor drum 12 side;
Bushes 53 and 53 are rotatably and movably fitted into the elongated holes 51a and 52a. Further, springs 54 and 54 are provided around the bushings 53 and 53 to bias the bushings toward the photosensitive drum 12.
is being strung up. A connecting pin 34a fixed to the support member 34.35 is provided in the center hole of the bush 53.53.
; 35a is rotatably fitted. A bearing 55.55 is fitted into the other end of the arm 51.52, and a crank mechanism 60 consisting of a pin 56.56, a link 57.57 and a shirt 1-58 is connected via this bearing. It is connected. Furthermore, the shaft 5
8 has a pulley 61. timing belt 62. Pulley 63
Torque from the motor 64 is transmitted through the motor 64. Note that the shaft 58 has a bearing pair 59.59.
The motor 64 is rotatably held on the apparatus main body 1 by a mounting base (not shown).

When the developing device 14 is located at a developing portion position close to the photosensitive drum 12 as shown in FIG. ing. That is, the line connecting the support shaft 33 and the rotating shaft 36 is substantially perpendicular, so that the vector of gravity is located at the position of the vertical line passing through the support shaft 33. At this time, as shown in detail in FIG. 9(a), the positions of the bushes 53 and 53 are in such a state that they are not in contact with either end of the elongated holes 51a and 52a, and the bushes 53 and 53 are not in contact with either end of the elongated holes 51a and 52a, and the bushes 53 and 53 are not in contact with either end of the elongated holes 51a and 52a. The positioning metal fitting 74 attached to this developing device 14b (this metal fitting 74 is attached to all the developing devices 14a to 14d, but only the positioning metal fitting 74 of the selected developing device 14b) is attached to the developing device 14b). ) is abutted against a positioning bin 75 provided on the apparatus main body 1 side, so that the gap G between the photosensitive drum 12 and the developing unit 14b is defined as shown in FIG. Further, in this state, the motor 64 is stopped rotating so that the link 57 (bin 56) faces most towards the photosensitive drum 12 side.

When the motor 64 starts rotating in a predetermined direction from the state shown in FIG. 9(a), first, as shown in FIG.
3, the developing device 14 begins to separate from the photosensitive drum 12. Then, when the motor 64 further rotates, the ninth
As shown in Figure (C), the support member 34°35 is tilted and
As shown in the figure, the developing device 14 is separated from the photosensitive drum 12 and is at a position where it can revolve.

FIG. 10 is a cross-sectional view showing the internal structure of each of the developing units 14a to 14d. Each of the developing units 148 to 14d is a developing unit containing, for example, developer E, which is a mixture of toner and magnetic carrier in an appropriate ratio. a container case 141, an agitator 147 for agitating the developer E in this case, and this agitator 14.
A developing roller 145 with a built-in magnet that transports the developer E stirred by 7 and supplies the developer E onto the photoreceptor drum 12;
The developer case 141 is provided with a doctor blade 146 for regulating the layer thickness of the developer E conveyed toward the developer E, and a toner replenishment roller 142 for replenishing the toner T in the developer E and a toner replenishment port 143 in the upper part of the developer case 141. Toner hopper 1 with
44 are provided.

Furthermore, a developing roller gear 145a is attached to the shaft of the developing roller 145.
The stirrer gear 14 is attached to the shaft of the stirrer 147.
7a are engaged as shown in FIG. Further, a replenishment roller gear 142a is meshed with this agitator gear 147a via an idle gear 148.

On the other hand, the apparatus main body 1 side is provided with a drive gear 71 attached to the shaft of a drive motor 70 and an idle gear 72 that meshes with the drive gear 71. When the developing roller approaches the photosensitive drum 12, the developing roller gear 145 is connected to the idle gear 72.
a meshes with each other as shown in FIG. 11, and the developing roller gear 145a
The driving force is transmitted in the order of → stirrer gear 147a → idle gear 148 → replenishment roller gear 142a. Note that an electromagnetic spring clutch (not shown) is interposed between the replenishment roller gear 142a and the toner replenishment roller 142, and the transmission of driving force is interrupted by magnetizing and demagnetizing the electromagnetic spring clutch. Toner T can be replenished intermittently.

1, 12, and 13 show an electric wire wiring device between each of the developing devices 14a to 14d and the apparatus main body 1, which is the gist of the present invention.
Rotation support shaft 4 for one side rotation frame 37 of a to 14d
A plurality of distribution wiring pulleys 81 to 84 (with the same outer diameters) are attached to the shaft ends of 1a to 41d (the rotating shafts are hollow) so as to rotate together with the respective developing devices 148 to 14d. Each of the wiring pulleys 81 to 84 has a central hole 80a for inserting an electric wire, an end groove 80b cut in the radial direction from the open end of the central hole 80a, and an outer peripheral hole 800 communicating with the end groove 80b. However, the end groove 80b may be omitted, and a pulley structure may be adopted in which the pulley center hole 80a, which is not open at the end surface, and the pulley outer peripheral hole 800 are directly connected to each other. One concentrated wiring pulley 85 (this wiring pulley 85 is configured such that electric wires 86 to 89 can be inserted into the interior through a plurality of outer peripheral holes 85c, and each developing device 14
A plurality of electric wires 86 to 89 connected to the energized parts 8 to 14d, for example, the magnet energized part of the developing row 5145, are connected to the center holes 80a of the distribution wiring pulleys 81 to 84 from inside the developing unit one-side rotating support shafts 416 to 41d. It extends outward from the outer peripheral holes 800 of the distribution wiring pulleys 81 to 84 and is wound around the outer periphery of the central wiring pulley 85 in an angular range of, for example, 270 degrees corresponding to the forward and reverse rotation angles of the rotating frames 37 and 38. After that, open the four outer peripheral holes 8 of this centralized wiring pulley 85.
5c into the pulley 85, and further passes through a gap 90 between the fixed tube 85a of the centralized wiring pulley 85 and the rotary shaft 36, and opens into the gap. (not shown) to the outside as shown in FIG. 1, and is configured to be connected to an outlet or the like provided on the device main body 1 side.

In the case of this embodiment, the end grooves 80b of the distribution wiring pulleys 81 to 84 are formed as cross-shaped grooves, and the outer peripheral holes 80C of the distribution wiring pulleys 81 to 84 are formed in the shape of the cross-shaped end grooves 80.
Four holes are opened so as to communicate with each groove end of b, and by selecting any one of the outer peripheral holes 80c, each electric wire 86 to 89 can be brought out to the outside as shown in Fig. 12. .

Therefore, the above electronics 1i 186 to 89 are multiple developing units 14a.
When the developing device 14b, for example, among the developing devices 14d to 14d is selected, the pulley is wound as shown in FIG. When the electric wires 86 to 89 are rotated 90 degrees in the counterclockwise direction in FIG.
), and in this state, the next developing device 14d
When the rotating frames 37 and 38 are further rotated 90 degrees counterclockwise in FIG. 13 to select When the rotating frames 37 and 38 are further rotated 90 degrees counterclockwise in FIG. 13 to select the next developing device 140 in this state, the state in which the electric wires 86 to 89 are wound around the pulleys is as shown in FIG. 13 (
d). As is clear from the rotational operation diagrams shown in FIG. 13(a) to l), which developing devices 14a to 1
Even if 4d is selected, the electric wires 86 to 89 that directly connect the developing device to the apparatus main body 1 side are always connected so that there is no slack or tension between the central wiring pulley 85 and the distribution wiring pulleys 81 to 84. Maintains good wiring wrapping condition.

Next, the operation of the entire image forming apparatus including the developing device 14 as described above will be explained. In the case of multiple copying mode, first set the first original on the document table 2 and, for example, if you want to make a red copy, first set the developing device 14 on the photoreceptor in order to select the developing device 14b containing red toner. Move it in the direction away from the drum 12 (to the right) and set it in the state shown in FIG.

When the movement of the developing device 14 is completed in this way, the reversible motor 46 for revolution is operated to rotate the rotating frame 37° 38 in forward and reverse directions, thereby allowing each developing device 1 to move as described above.
4a to 14d are kept in a parallel state and revolved within a predetermined rotation range, and the developing device 14b to be selected is connected to the photosensitive drum 1.
When it faces 2, it stops its revolution. When this operation is completed, the developing device 14 is moved to the photosensitive drum 12 side, and as shown in FIG.
4b is set in a state where it approaches and faces the photoreceptor drum 12. With the above operation, the selection operation of the developing unit 14b corresponding to the selected and designated color is completed, and red copying becomes possible.

Next, the copying operation is started, and red copying is performed using the developing device 14I]. That is, exposure is performed as the original is scanned, and the photoreceptor drum 1 formed by this exposure
The electrostatic latent image on 2 is visualized by the developing device 14b, and this visualized toner image is transferred onto the paper P to be supplied. Next, the paper P on which the toner image has been transferred is sent to a fixing device 22 by a transport belt 21, fixed under pressure, and sent to a transport roller 23. Then, the paper P that has been fixed
is sent to the position of the selector 28 by the conveyance roller 23, at this time the selector 28 moves the cellar 1 to the solid line position in FIG.
Since the paper P is turned by the selector 28 and the paper guide path 29, it is sent to the t transport path 30. This conveyance path 30 conveys the paper P to the front side of the registration rollers 18, and temporarily stops the sheet P at that position to prepare for the copying operation of the next color.

Next, set the second original, and in order to stop multiple copying at this point, 1. The multiple copying mode is canceled and the developing device 14 containing black toner is removed by the same selection operation as described above.
A is selected and black copying becomes possible. Note that if you want to continue multiple copying again here, you can leave the multiple copying mode as it is.

In this way, when the multiple copy mode is canceled, the same copying operation as described above is started, and black copying is performed using the developing device 14a. In this case, a black copy is made superimposed on the previously made red copy.

The paper P that has been overlapped is transferred to the transport roller 23.
When the paper P is fed, the selector 28 has been switched to the position shown by the broken line in FIG. Multiple copies are performed in the manner described above. Note that by continuing to use the multiple copying mode without canceling it, it is also possible to duplicate blue and green colors.

Note that although the above embodiment describes the case where the present invention is applied to a color copying machine, the present invention is not limited thereto, and may be applied to other image forming apparatuses such as electronic printers, facsimile machines, or printing machines. I can do it.

[Effects of the Invention] The image forming apparatus of the present invention supports a plurality of developing devices containing developers of different colors on a rotating frame so as to be able to revolve while keeping them in a parallel state. One of the developing devices is selected and the latent image on the image carrier is developed by the selected developing device, and the rotational drive mechanism of the rotating frame is rotated so that the developing device revolves one revolution or more. A plurality of distribution wiring pulleys are attached to an end of a rotational shaft of each developing device to rotate integrally with the rotating frame on one side of the developing device, and One centralized wiring pulley is provided which is rotatably loosely inserted into the central rotating shaft and fixed so as not to rotate with respect to one side support member of the rotating shaft, and a plurality of centralized wiring pulleys connected to the current-carrying part of each developing unit are provided. After the electric wire passes through the center hole of the distribution wiring pulley, extends outward from the outer peripheral hole of the distribution wiring pulley, and is wound around the outer periphery of the central wiring pulley in an angular range corresponding to the forward and reverse rotation angle of the rotating frame. Since the central wiring is passed through the outer peripheral hole of the pulley and connected to the main body of the apparatus, the electrical connection between the developing device with the revolving structure and the main body of the apparatus is not conventional. To provide an image forming apparatus having a new structure, which has the effect of reliably wiring by directly connecting electric wires without using a connector such as a connector, and which does not cause problems such as poor electrical contact or wear of connection terminals. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a developing device showing the main parts of the apparatus of the present invention, FIG. 2 is an overall schematic vertical sectional view of a color copying machine to which the apparatus of the present invention is applied, and FIG. 3 is the same. 4 is a front view of the developing device, FIG. 5 is a perspective view showing the image bearing device approach/separation mechanism, and FIG. 6 is a diagram of the developing device. A front view showing the rotating frame, FIG. 7 is an explanatory view showing the state in which the timing belt is wrapped, FIG. 8 is a front view showing the state in which the developing device is separated from the photoreceptor drum, and FIGS. 9(a) to (C) ) is an explanatory diagram of the operation of the approach/separation mechanism, FIG. 10 is a central vertical sectional view showing the internal structure of the developing device,
FIG. 11 is a rear view showing the drive system of the developing unit, FIG. 12 is a perspective view of the electric wire wiring portion which is the gist of the present invention, and FIG.
) to (d) show diagrams of the rotational movement of the electric wire wiring portion when selecting a developing device. DESCRIPTION OF SYMBOLS 1... Image forming apparatus main body, 12... Image carrier (photosensitive drum), 14... Developing device, 14a to 14d...
・Developer, 34, 35...Rotary shaft support member, 36・
... Center rotation axis of the rotating frame, 37.38... Rotating frame, 40a to 40d... Right side rotating support shaft of the developing unit,
41a to 41d...Developer left side (one side) rotation support shaft, 4
9...Rotary frame rotation drive mechanism, 50...Developing device approach/separation mechanism, 81-84...Distribution wiring pulley, 80
C... Outer circumferential hole of the same pulley, 85... Centralized wiring pulley, 85a... Fixed cylinder of the same Boono, 85c... Outer circumferential hole of the same pulley, 86-89... Representative for the electric wire applicant, patent attorney Takehiko Suzue, Figure 7 bb Figure 9 Figure 10 Figure 11

Claims (2)

[Claims] (1) A plurality of developing devices containing developers of different colors are supported by a rotating frame so that they can revolve while being kept in a parallel state, and one of the developing devices is activated by the rotation of this rotating frame. In an image forming apparatus in which a latent image on an image carrier is developed by the selected developing device, the rotational drive mechanism of the rotating frame is a forward/reverse rotation drive mechanism in which the developing device does not revolve more than one revolution. configured as,
A plurality of distribution wiring pulleys are attached to an end of a rotational shaft of each developing device on one side of the rotating frame so as to rotate together with each developing device, and are rotatably inserted loosely into the central rotating shaft of the rotating frame. A central wiring pulley is provided that is fixed so as not to rotate with respect to one side support member of the rotating shaft, and a plurality of electric wires connected to the current-carrying portion of each developing device pass through the center hole of the distribution wiring pulley. The cable extends outward from the outer circumferential hole of the distribution wiring pulley, and is wound around the outer circumference of the centralized wiring pulley in an angle range corresponding to the forward and reverse rotation angle of the rotating frame. An image forming apparatus characterized in that the image forming apparatus is connected to a main body of the apparatus by being passed through the inside of the apparatus. (2) The outer diameters of the distribution wiring pulley and central wiring pulley are
The image forming apparatus according to claim 1, wherein the image forming apparatus is equal to each other.