JPH10207158A - Non-rotating structure for rotating parts - Google Patents

Abstract

(57) [Problem] To improve the workability when attaching an electromagnetic clutch to a side plate while preventing it from rotating. The anti-rotation structure is a structure for preventing electromagnetic clutches (C1, C3, C4) from rotating with respect to a second divided plate (34).
1, 83, 84 and locking screws 87, 89, 91 provided on the second divided plate 34. The locking screw is
A locking position where the electromagnetic clutch is locked to the locking member in a state where the electromagnetic clutch is mounted on the second split plate, and a locking release position where locking to the locking member is released can be taken.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation preventing structure, and more particularly to a rotation member for stopping rotation of a member rotatably supported between a base member and a lid member detachably attached to the base member. Regarding the stop structure.

[0002]

2. Description of the Related Art For example, in a copying machine, a drive unit is provided for transmitting the rotation of a drive motor to a photosensitive drum, a developing device, a sheet feeding device, or the like. This drive unit has a pair of side plates spaced apart from each other and a gear train composed of a plurality of gears rotatably supported between the pair of side plates. The plurality of gears are for transmitting rotation of the drive motor to an input portion of a driven mechanism such as a paper feed roller, and an electromagnetic clutch is provided in the rotation transmission path. By turning on or off this electromagnetic clutch to transmit or cut off rotation,
The paper feed start timing of the paper feeder is set.

Conventionally, when the above-described electromagnetic clutch is fixed to a side plate, a notch for locking is conventionally provided on the side of the electromagnetic clutch, and a claw formed by cutting and raising a part of the side plate is formed. The claw is locked in the locking notch on the electromagnetic clutch side. Thereby, the electromagnetic clutch can be prevented from rotating with respect to the side plate.

[0004]

When the electromagnetic clutch is replaced in the above-mentioned drive unit, for example, one side plate is removed, the desired electromagnetic clutch is replaced, and the side plate is fixed to the other side plate again. . At this time, it is necessary to attach the side plate while aligning the locking notch on the electromagnetic clutch side with the claw of the side plate.

However, since the drive unit usually has a plurality of electromagnetic clutches, it is very difficult to mount the side plates while aligning the notches for locking on all the electromagnetic clutches with the claws of the side plates. Have difficulty. Such a problem is not limited to the case of attaching an electromagnetic clutch in a copying machine, and generally, a case where a member that rotates between a pair of side plates or between a base member and a lid member is attached and its rotation is stopped. This is a common problem.

An object of the present invention is to improve workability when a rotating member is mounted between a base member and a lid member while preventing rotation.

[0007]

According to a first aspect of the present invention, there is provided a rotation preventing structure for a rotating component for stopping rotation of a component rotatably supported between a base member and a lid member detachably attached to the base member. And has a female locking portion provided on a rotating component and a male locking member provided on a lid member. The male locking member is configured such that the rotating part is supported between the base member and the lid member, and the locking position for locking the female locking portion and the locking for the female locking portion are released. Release position can be taken.

Here, first, one end side of the rotating component is attached to the base member. Next, the male locking member of the lid member is positioned at the locking release position, and the lid member is mounted on the base member. After attaching the lid member to the base member, the rotating component is rotated to position the female locking portion on the component side and the male locking member on the lid member. After the alignment is completed, the male locking member is moved to the locking position. Thereby, the male locking member on the lid member is locked to the female locking portion of the rotating component, and the component is prevented from rotating.

In this case, since the male locking member can be locked after supporting the component between the base member and the lid member, the mounting of the component and the lid member on the base member, Locking of the female locking portion and the male locking member can be performed separately. Therefore, workability is improved particularly when a plurality of components are supported between the base member and the lid member.

According to a second aspect of the present invention, there is provided a rotation preventing structure for a rotating component according to the first aspect, wherein the female locking portion is a notch. According to a third aspect of the present invention, in the rotation preventing structure for a rotating component, the female locking portion is a hole. According to a fourth aspect of the present invention, in the rotation preventing structure for a rotating component according to any one of the first to third aspects, the male locking portion is a screw screwed to the lid member. In this case, the screw can be locked to or released from the female locking portion only by loosening or tightening the screw, so that the structure is simple and the workability is further improved. .

According to a fifth aspect of the present invention, in the structure for preventing rotation of a rotating component according to any one of the first to fourth aspects, the female locking portion is formed on a plate mounted on the rotating component. According to a sixth aspect of the present invention, in the structure of any one of the first to fifth aspects, the female locking portion is visible near a portion where the male locking portion of the lid member is locked. Opening is provided. In this case, the male locking member can be locked to the female locking portion while checking the position of the female locking portion from the opening, and the workability is further improved.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

[Structure of Copying Machine] FIG. 1 shows a copying machine having a drive unit according to an embodiment of the present invention. In the figure,
An original mounting table 2 is fixed to an upper surface of the copying machine main body 1. A document holder 3 is mounted on the document table 2 so as to be openable and closable. On the other hand, a bypass tray 5a is mounted on the right side of the copying machine main body 1 and the paper feed cassettes 5, 6
Is mounted detachably, and on the left is mounted a paper discharge tray 7 for discharging copied paper. Although not shown, the bypass tray 5a is provided with a bypass lift mechanism, which presses and releases the paper to reduce the load in feeding the paper.

Inside the copying machine main body 1, an optical system 8 for reading a document is provided at an upper portion thereof. A photosensitive drum 9 is arranged at substantially the center of the apparatus main body 1. Around the photoconductor drum 9, a main charging corona discharger 10, a developing device 11, a transfer corona discharger 12, a separation corona discharger 13, and a cleaning device 14 for charging the photoconductor drum 9 to a predetermined charge are provided. Are located.

A bypass paper supply section 15a is provided between the image forming section formed by the photosensitive drum 9 and the like and the bypass tray 5a.
And a paper feeder 15 for conveying the paper to the image forming unit.
Is provided. The paper feeding device 15 includes a registration roller that controls the timing of feeding paper to the image forming unit. Further, a sheet conveying device 16 is provided downstream of the image forming section. A fixing device 20 for fixing the toner image on the conveyed paper is provided between the paper conveyance device 16 and the discharge roller 19.

[Configuration of Driving Unit] This copying machine main body 1
A drive unit 30 for driving the photosensitive drum 9, the developing device 11, the bypass paper feeder 15a, the paper feeder 15, and a bypass lift mechanism (not shown) is provided at the back side of the printer. As shown in FIG. 2, the drive unit 30 includes a base plate 32 on which a drive motor 31 is fixed on the rear surface side, and a first divided plate supported by the base plate 32 at a predetermined distance from the base plate 32. 33 and a second dividing plate 34; a gear train 35 and a plurality of electromagnetic clutches arranged hierarchically between the base plate 32 and the first and second dividing plates 33 and 34; An input gear 36 to the registration roller is provided outside the first dividing plate 33 (on the front side in FIG. 2), and an input gear 37 to the sheet feeding device 15 is provided outside the second dividing plate 34. Input gear 3 to bypass paper feeder 15a
8 are provided.

FIG. 2 is a view of the drive unit 30 as viewed from the near side of the copying machine. The base plate 32 is disposed at the farthest side of the copying machine, and the drive motor 31 is disposed on the back (further back). Are arranged, and two divided plates 33 and 34 are arranged in front of the base plate 32. Since the gear train 35 of the drive unit 30 includes a plurality of clutches and is arranged in a hierarchy, the configuration will be described for each hierarchy according to the drive path.

[First Gear Train] FIG. 3 shows the base plate 32 and the first gear train.
A gear train 40 is shown. The first gear train 40 is arranged at a position closest to the base plate 32, and the drive motor 3
A first gear G1 fixed to the end of the first output shaft, and upper and lower second and third gears G2 and G3 meshing with the first gear G1.
And a fourth gear G4 fixed coaxially with the second gear G2.
And a fifth gear G5 coaxially fixed with the third gear G3. Each of these gears is rotatably supported by a base plate 32.

[Second Gear Train] FIG. 4 shows a second gear train 50 supported by the base plate 32. Second gear train 50
Is arranged on the front side of the first gear train 40, and has a plurality of gears and an electromagnetic clutch. This second gear train 5
0 has a sixth gear G6 that meshes with the fifth gear G5 of the first gear train 40. The sixth gear G6 is engaged with a seventh gear G7 for driving the developing device 11, an eighth gear G8 for high speed of the sheet feeding device 15, and a ninth gear G9 for intermediate transmission. The eighth gear G8 is fixed to an end face of the cylindrical first electromagnetic clutch C1 on the device rear side. The first electromagnetic clutch C1 is turned on and off by a signal from a control unit (not shown). When the first electromagnetic clutch C1 is on, the rotation from the eighth gear G8 is transmitted to the center shaft 51, and when it is off. The rotation from the eighth gear G8 is not transmitted to the shaft 51.

The second gear train 50 includes a tenth gear G10 for driving a registration roller meshing with the ninth gear G9, and an eleventh gear G11 for low speed of the sheet feeding device 15 similarly meshing with the ninth gear G9. Have. The tenth gear G10 is fixed to an end face on the device rear side of the cylindrical second electromagnetic clutch C2. The eleventh gear G11 is fixed to an end face on the device rear side of the cylindrical third electromagnetic clutch C3. The second and third electromagnetic clutches C2 and C3 are on / off controlled by a signal from a control unit (not shown). When the second electromagnetic clutch C2 is on, the rotation from the tenth gear G10 is transmitted to the central shaft 52. When it is off, the rotation from the tenth gear G10 is not transmitted to the shaft 52. When the third electromagnetic clutch C3 is on, the rotation from the eleventh gear G11 is transmitted to the center shaft 53, and when the third electromagnetic clutch C3 is off, the eleventh gear G11
The rotation from 11 is not transmitted to shaft 53.

Further, the second gear train 50 includes a twelfth gear G for driving the bypass sheet feeding device 15a which meshes with the eighth gear G8.
And a thirteenth gear G13 for driving a bypass lift, which meshes with the twelfth gear G12. 12th gear G
Reference numeral 12 is fixed to the end face of the cylindrical fourth electromagnetic clutch C4 on the inner side of the apparatus. Further, the thirteenth gear G13 is fixed to an end face on the device rear side of the fifth electromagnetic clutch C5. The fourth and fifth electromagnetic clutches C4 and C5 are on / off controlled by a signal from a control unit (not shown). When the fourth electromagnetic clutch C4 is on, the rotation from the twelfth gear G12 is transmitted to the central shaft 54. When it is off, the rotation from the twelfth gear G12 is not transmitted to the shaft 54. When the fifth electromagnetic clutch C5 is on, the rotation from the thirteenth gear G13 is transmitted to the center shaft 55, and when the fifth electromagnetic clutch C5 is off, the thirteenth gear G13
The rotation from 13 is not transmitted to shaft 55.

The gears and shafts described above are rotatably supported by a base plate 32. The fourth gear G4 is configured to drive the photosensitive drum 9 via the timing belt 56. [Third Gear Train] FIG. 5 shows a third gear train 60 supported by the base plate 32. The third gear train 60 is disposed at a position closest to the base plate 32 in parallel with the first gear train 40. The third gear train 60 is fixed to a fourteenth gear G14 fixed to the shaft 51 on which the first electromagnetic clutch C1 is mounted, and is fixed to a shaft 53 meshing with the fourteenth gear G14 and having the third electromagnetic clutch C3 mounted. 15th gear G15. This third gear train 6
No. 0 has a sixteenth gear G16 fixed to the shaft 55 on which the fifth electromagnetic clutch C5 is mounted, and a seventeenth gear G17 that meshes with the sixteenth gear G16. 17th gear G
Numeral 17 is for transmitting rotation to another unit for driving the bypass lift mechanism. These gears and shafts are rotatably supported by the base plate 32.

[Split Plate] FIG. 6 shows only the base plate 32 and the first and second split plates 33 and 34, and omits other gear trains and electromagnetic clutches. The first split plate 33 includes a sixth gear G6, a seventh gear G7, a ninth gear G9, and a tenth gear G1.
A side plate for supporting the 0 and the second electromagnetic clutch C2, which is fixed to the base plate 32 with screws or the like. A circular second opening 66 having an outer diameter larger than the outer shape of the second electromagnetic clutch C2 is formed in a portion facing the second electromagnetic clutch C2.

A clutch support plate 68 is detachably attached to the first split plate 33 by a screw (not shown). The clutch support plate 68 is a member for supporting the second electromagnetic clutch C2, has mounting portions 68a, 68c, 68b protruding outward on the outer peripheral portion.
6 is mounted so as to cover it. Thus, the opening 66 is formed in the first split plate 33, and the clutch support plate 68 is
By providing it separately from the dividing plate 33, it is possible to attach and detach the second electromagnetic clutch C2 only by removing the clutch support plate 68 without removing other members.

The second dividing plate 34 is provided with third and fifth gears G3 and G3.
G5, eighth and fourteenth gears G8 and G14, first electromagnetic clutch C1, eleventh and fifteenth gears G11 and G15, third electromagnetic clutch C3, twelfth gear G12, and fourth electromagnetic clutch C
Fourth, thirteenth and sixteenth gears G13 and G16, side plates for supporting the fifth electromagnetic clutch C5 and the seventeenth gear G17, which are fixed to the base plate 32 with screws or the like. By removing the second divided plate 34 from the base plate 32, the gears and clutches supported by the second divided plate 34 can be removed without removing the gears and clutches supported by the first divided plate 33. .

The second dividing plate 34 can be further divided. In other words, when a certain electromagnetic clutch is detached, if the side plate that supports only the gear that interferes with this electromagnetic clutch is divided into units, when exchanging a certain electromagnetic clutch, the clutch can be removed only by removing the minimum necessary members. Can be exchanged. Further, the second divided plate 34
It is also conceivable to provide the clutch support plate 68 in the first split plate 33 on the side. Here, the clutch support plate is not provided on the side of the second divided plate 34 due to a space or the like for forming the opening.

[Positioning mechanism] Here, each split plate 33,
34 and the clutch support plate 68 need to be positioned with high precision with respect to the base plate 32. This is because it is necessary to accurately maintain the distance between the axes and to strictly control the concentricity between the base plate and each of the divided plates. Therefore, here, as shown in FIG. 6, first to fifth rods 70 to 74 are used as positioning members between the base member 32 and the respective split plates.
Is provided. The first rod 70 and the second rod 71 are for positioning the first divided plate 33 with respect to the base plate 32, and the first rod 70 and the third rod 72 are for positioning the base plate 32.
For positioning the clutch support plate 68 with respect to. The fourth rod 73 and the fifth rod 74 are connected to the base plate 32.
For positioning of the second divided plate 34 with respect to. And
The hole into which each rod is inserted is machined with high precision.

[Input Gear] The input gear 36 to the registration roller described above is mounted on the end of the shaft 52 concentrically with the second electromagnetic clutch C2, and the input gear 37 to the sheet feeding device 15 is provided.
Is mounted on the end of the shaft 53 concentrically with the third electromagnetic clutch C3, and the input gear 38 to the bypass paper feeder 15a is mounted on the end of the shaft 54 concentrically with the fourth electromagnetic clutch C4.

[Rotation Prevention Mechanism] The drive unit 30 is provided with a detent structure for each electromagnetic clutch. That is, the electromagnetic clutch can rotate with its central axis, but the base plate 32 and the split plate 3
Each electromagnetic clutch must be prevented from rotating with respect to 3, 34 or the clutch support plate 68.

Therefore, in this embodiment, first, as shown in FIG.
Fifth locking members 81 to 85 are provided. Each locking member 81
No. to 85 have substantially the same shape, and the first locking member 81 is shown enlarged in FIG. As shown in the figure, the first locking member 81
Has a bifurcated shape, and has a notch 8
1a. As shown in FIG. 6, an opening 86 is formed in a portion of the second divided plate 34 where the first electromagnetic clutch C1 is mounted, and a locking screw 8 is formed near the opening 86.
7 is screwed. In addition, the third divided plate 34
An opening 88 is formed in a portion where the electromagnetic clutch C3 is mounted, and a locking screw 89 is screwed near the opening 88. Further, an opening 9 is provided at a portion where the fourth electromagnetic clutch C4 is mounted.
0 is formed, and a locking screw 91 is screwed in the vicinity thereof.

In such a structure, as shown in FIG.
The position of the locking member 81 of the first electromagnetic clutch C1 is matched with the position of the locking screw 87, and the locking screw 87 is tightened so that the locking screw 87 is cut out of the locking member 81. 8
1a. Thereby, the first electromagnetic clutch C
One rotation can be stopped. The same applies to the other third electromagnetic clutch C3 and fourth electromagnetic clutch C4.

As shown in FIG. 6, on the outer periphery of the clutch support plate 68, a locking claw 68d bent toward the base plate 32 is formed. This locking claw 68d is the second
The second electromagnetic clutch C2 can be inserted into the notch of the locking member 82, thereby stopping the rotation of the second electromagnetic clutch C2. Further, as shown in FIGS. 3 to 5, the end of the base plate 32 on the fifth electromagnetic clutch C5 side is bent toward the second split plate 34,
A locking claw 32a is formed in a part thereof. The locking claw 32a can be inserted into the notch of the fifth locking member 85, thereby stopping the rotation of the fifth electromagnetic clutch C5.

[Operation] Next, the operation of the drive unit 30 will be described. The operation of the copying machine itself is the same as the normal operation. 1) Drive of photosensitive drum [Rotation transmission path: drive motor 31 → first gear G1 → second
Gear G2 = fourth gear G4 → timing belt 56 → photosensitive drum 9] The rotation of the drive motor 31 is transmitted to the second gear G2 via the first gear G1. Since the second gear G2 and the fourth gear G4 are coaxially fixed, the rotation of the second gear G2 causes the fourth gear G4 to rotate similarly. This rotation is transmitted to a gear (not shown) fixed to the photosensitive drum 9 via the timing belt 56, and the photosensitive drum 9 is driven.

2) Drive of developing device [Rotation transmission path: drive motor 31 → third gear G3 = fifth gear
Gear G5 → sixth gear G6 → seventh gear G7 → developing device] The drive motor 31 rotates through the first gear G1 to the third gear G
3 is transmitted. Since the third gear G3 and the fifth gear G5 are coaxially fixed, the rotation of the third gear G3 causes the fifth gear G3 to rotate.
The gear G5 also rotates. Accordingly, the sixth gear G6 meshing with the fifth gear G5 rotates, and further, the seventh gear G7 meshing with the sixth gear G6 rotates. The rotation of the seventh gear G7 is input to the developing device.

3) Driving of registration rollers [Rotation transmission path: drive motor 31 → third gear G3 = fifth gear
Gear G5 → sixth gear G6 → ninth gear G9 → tenth gear G
10 = second electromagnetic clutch C2 = shaft 52 = registration roller input gear 36 → registration roller] The rotation transmitting operation up to the sixth gear G6 is the same as the driving of the developing device. The rotation of the sixth gear G6 rotates the ninth gear G9 meshing with the sixth gear G6, and further the tenth gear G10 meshing with the ninth gear G9
Rotates. The tenth gear G10 is the second electromagnetic clutch C2
, The rotation of the tenth gear G10 is transmitted to the shaft 52 when the second electromagnetic clutch C2 is on.
The rotation of the shaft 52 is transmitted to the registration roller via the registration roller input gear 36. When the second electromagnetic clutch C2 is off, the rotation is not transmitted to the shaft 52, and the registration roller does not rotate.

4) Driving of Paper Feeding Device (Low Speed) The paper feeding device 15 can feed at low speed and high speed. In the case of low speed feeding, the third electromagnetic clutch C3 is turned on, and the first
The electromagnetic clutch C1 is turned off. [Rotation transmission path: drive motor 31 → third gear G3 = fifth gear G5 → sixth gear G
6 → ninth gear G9 → eleventh gear G11 = third electromagnetic clutch C3 = shaft 53 = paper feeder input gear 37 → paper feeder] The rotation transmitting operation up to the ninth gear G9 is the same as the case of driving the registration roller. The same is true. The rotation of the ninth gear G9 rotates the eleventh gear G11. Since the eleventh gear G11 is fixed to the third electromagnetic clutch C3, when the third electromagnetic clutch C3 is on, the rotation of the eleventh gear G11 is
3, the sheet feeding device 15 is driven via the sheet feeding device input gear 37. When both the third electromagnetic clutch C3 and the first electromagnetic clutch C1 are off, the sheet feeding device is not driven.

5) Driving of Paper Feeding Device (High Speed) In the case of high-speed paper feeding, the first electromagnetic clutch C1 is turned on,
The third electromagnetic clutch C3 is turned off. [Rotation transmission path:
Drive motor 31 → third gear G3 = fifth gear G5 → sixth gear G6 → eighth gear G8 = first electromagnetic clutch C1 = shaft 51
= 14th gear G14 → 15th gear G15 = shaft 53 = paper feeder input gear 37 → paper feeder] The rotation transmitting operation up to the sixth gear G6 is the same as described above. The rotation of the sixth gear G6 rotates the eighth gear G8 meshing with the sixth gear G6. Since the eighth gear G8 is fixed to the first electromagnetic clutch C1, when the first electromagnetic clutch C1 is on, the rotation of the eighth gear G8 is transmitted to the shaft 51, whereby the fourteenth gear G14 rotates. . Then, the fifteenth gear G15 meshing with the fourteenth gear G14 rotates. Since the fifteenth gear G15 is fixed to the shaft 53, the rotation of the fifteenth gear G15 causes the paper feeder input gear 37 to rotate, whereby the paper feeder 15 is driven.

As described in the low-speed paper feeding operation, the rotation of the drive motor 31 is also transmitted to the eleventh gear G11 for low-speed paper feeding. However, in the case of high-speed paper feeding, the third
Since the electromagnetic clutch C3 is off, the rotation of the low-speed paper feeding system is not transmitted to the paper feeding device side. 6) Driving the bypass paper feeder In the case of bypass paper feed, the first electromagnetic clutch C1 is off.

[Rotation transmission path: drive motor 31 → third gear G3 = fifth gear G5 → sixth gear G6 → eighth gear G8 →
12th gear G12 = fourth electromagnetic clutch C4 = shaft 54 = bypass feeder input gear 38 → bypass feeder]
The rotation transmitting operation up to the gear G8 is the same as described above. 8th
The twelfth gear G1 meshing with the rotation of the gear G8
2 rotates. The twelfth gear G12 is connected to the fourth electromagnetic clutch C
4, when the fourth electromagnetic clutch C4 is on, the rotation of the twelfth gear G12 is transmitted to the shaft 54, whereby the bypass feeder input gear 38 is rotated, and thereby the bypass feeder 38 is rotated. The device 15a is driven.
As described above, since the first electromagnetic clutch C1 is off, even if the eighth gear G8 rotates, the rotation is not transmitted to the shaft 51.

7) Driving the bypass lift mechanism [Rotation transmission path: drive motor 31 → third gear G3 = fifth gear
Gear G5 → sixth gear G6 → eighth gear G8 → twelfth gear G
12 → 13th gear G13 = fifth electromagnetic clutch C5 = shaft 5
5 = 16th gear G16 → 17th gear G17 → bypass lift mechanism (not shown)] The rotation transmission operation up to the twelfth gear G12 is the same as described above. By the rotation of the twelfth gear G12, the thirteenth gear G13 meshing with this rotates. Since the thirteenth gear G13 is fixed to the fifth electromagnetic clutch C5, when the fifth electromagnetic clutch C5 is on,
The rotation of the gear G13 is transmitted to the shaft 55, whereby the first
Six gears G16 rotate. And this 16th gear G16
The seventeenth gear G17 meshing with the gear rotates, and this rotation drives a bypass lift mechanism provided in another unit.

[Replacement of Electromagnetic Clutch] When replacing the second electromagnetic clutch C2 in this drive unit 30,
Loosen the screw and remove the clutch support plate 68 from the base plate 32 and the first split plate 33. The first split plate 33 has a second
Since the second opening 66 that is larger than the outer diameter of the electromagnetic clutch C2 is formed, the second electromagnetic clutch C2 is moved from the base plate 32 and the first split plate 33 while the second electromagnetic clutch C2 is attached to the clutch support plate 68. Can be removed. After that, the second electromagnetic clutch C2 may be removed from the clutch support plate 68.

When the second electromagnetic clutch C2 is to be mounted again, first, the locking claw 68d of the clutch support plate 68 is locked in the notch of the locking member 82 of the second electromagnetic clutch C2 so that the second electromagnetic clutch C2 is engaged. It is attached to the clutch support plate 68. Next, while inserting the second electromagnetic clutch C2 into the second opening 66 of the first split plate 33, the clutch support plate 68 is
Fix to 3.

As described above, when replacing the second electromagnetic clutch C2, the second electromagnetic clutch C2 can be easily attached and detached without removing other gears and clutches. When replacing another electromagnetic clutch, first, the input gears 37 and 38 are removed. Next, the screws are loosened, and the second divided plate 34 is removed from the base plate 32.
In this state, it is possible to remove from the base plate 32 the electromagnetic clutches supported on the second dividing plate 34 side and the gears that interfere when removing them. Since the electromagnetic clutches and the gears that interfere when the electromagnetic clutches are removed are supported by the same second dividing plate 34, the electromagnetic clutches and the gears can be detached while being supported by the second dividing plate 34. is there.

When attaching the second split plate 34 to the base plate 32 again after replacing the electromagnetic clutch, the screws 87, 89 and 91 for stopping the rotation of the electromagnetic clutch are loosened, and FIG.
As shown by the solid line. And the base plate 3
After supporting the shaft, gears, and electromagnetic clutch on 2, the second dividing plate 34 is attached to the base plate 32 while the positioning rod and the shaft are inserted into the holes of the second dividing plate 34.

Thereafter, the respective electromagnetic clutches are rotated while checking the positions of the locking members of the respective electromagnetic clutches from the openings 86, 88, 90 formed in the second divided plate 34, and the respective locking members 81, 83, 84 notch and locking screws 87, 89,
Positioning 91 is performed. Then, the locking screw is tightened so that the screw tip is locked in the notch of the locking member. In this way, after attaching the second divided plate 34 to the base plate 32, the rotation of each of the electromagnetic clutches can be stopped, and the exchange workability of the electromagnetic clutch and the assemblability at the time of shipment are improved.

[Other Embodiments] (a) The shape of the female locking portion is not limited to the above embodiment.
For example, as shown in FIG.
A hole 95a into which a locking screw can be inserted may be formed. (B) Although the locking member fixed to the electromagnetic clutch is employed as the female locking portion, the locking portion may be provided integrally with the housing portion of the electromagnetic clutch.

(C) The present invention can be applied not only to the detent structure of the electromagnetic clutch in the drive unit of the copying machine, but also to the detent structure for any part rotatably supported between the base member and the lid member. It is.

[0047]

As described above, according to the present invention, when a component is attached between the base member and the lid member, the operation of attaching the component and the lid member to the base member and the operation of preventing the component from rotating are performed. Can be performed separately, so that the workability is improved particularly when a plurality of components are mounted between the booth member and the lid member.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a longitudinal section of a copying machine having a drive unit according to an embodiment of the present invention.

FIG. 2 is a front view of the drive unit.

FIG. 3 is an exploded front view showing a base plate and a first gear train of the drive unit.

FIG. 4 is an exploded front view showing a base plate and a second gear train of the drive unit.

FIG. 5 is an exploded front view showing a base plate and a third gear train of the drive unit.

FIG. 6 is a front view showing a base plate and a split plate of the drive unit.

FIG. 7 is a front view of a locking member provided on the electromagnetic clutch of the drive unit.

FIG. 8 is a partial cross-sectional view for explaining the operation of the locking member.

FIG. 9 is a view showing another embodiment of the locking member.

[Explanation of symbols]

 32 base plate 33 first split plate 34 second split plate 68 clutch support plate 81-85 locking member 86,88,90 opening 87,89,91 locking screw C1-C5 electromagnetic clutch

Claims (6)

[Claims] An anti-rotation structure for stopping rotation of a component rotatably supported between a base member and a lid member detachably attached to the base member, wherein a female provided on the rotating component is provided. A locking portion, a locking position provided on the lid member, and a locking position for locking the rotating component to the female locking portion while being supported between the base member and the lid member, and the female locking portion. And a male locking member capable of taking an unlocked position where the locking of the rotating component is released. 2. The structure according to claim 1, wherein said female locking portion is a notch. 3. The structure according to claim 1, wherein the female locking portion is a hole. 4. The rotation-preventing structure for a rotating component according to claim 1, wherein said male locking portion is a screw screwed to said lid member. 5. The rotation-preventing structure for a rotating component according to claim 1, wherein said female locking portion is formed on a plate mounted on said rotating component. 6. An opening according to claim 1, wherein an opening through which said female locking portion is visible is provided near a portion of said lid member where said male locking portion is locked. A rotating structure for rotating parts as described.