JP3914188B2 - Non-rotating structure for rotating parts - Google Patents

Description

  The present invention relates to a detent structure, and in particular, rotation for stopping rotation of a component that is rotatably supported so as to be covered by the lid member between a base member and a lid member that is detachable from the base member. The present invention relates to a part detent structure.

  For example, in a copying machine, a drive unit is provided to transmit the rotation of a drive motor to a photosensitive drum, a developing device, a paper feeding device, or the like. This drive unit has a pair of side plates arranged at a distance 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 the rotation of the drive motor to the input portion of the driven side mechanism such as a paper feed roller, and an electromagnetic clutch is provided in the rotation transmission path. The electromagnetic clutch is turned on and off to transmit or shut off the rotation, thereby taking the feeding start timing of the sheet feeding device.

  In the case of fixing the electromagnetic clutch to the side plate as described above, conventionally, a notch for locking is provided on the electromagnetic clutch side, and a claw formed by cutting and raising a part of the side plate is formed. Is locked in the notch for locking on the electromagnetic clutch side. Thereby, the electromagnetic clutch can be prevented from rotating with respect to the side plate.

Further, as a structure for preventing rotation of components such as a rotating electromagnetic clutch, a microfilm disclosed in Japanese Utility Model Application No. 61-18862 (Japanese Utility Model Application No. 61-150531) or Japanese Utility Model Application No. 60-95161 (Japanese Utility Model Application No. 62). -4633) microfilm. In these conventional structures, a plate member for preventing rotation is provided on the rotating component side, and a notch or hole is formed in the plate member, and a locking member such as a screw is locked in this hole to prevent rotation. Like to do.
Microfilm of Japanese Utility Model No. 61-18862 (Japanese Utility Model Application No. 61-150531) Microfilm of Japanese Utility Model No. 60-95161 (Japanese Utility Model Publication No. 62-4633)

  For example, when replacing the electromagnetic clutch in the drive unit as described above, the side plate on one side is removed, the target electromagnetic clutch is replaced, and then 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 notch for locking on the electromagnetic clutch side and the claw of the side plate.

  However, since the drive unit is usually provided with a plurality of electromagnetic clutches, it is very difficult to attach the side plates while aligning the notches for locking on the side of all electromagnetic clutches and the claws of the side plates. .

  Such a problem is not limited to the case of attaching an electromagnetic clutch in a copying machine, but generally, a rotating member is attached between a pair of side plates or between a base member and a lid member to prevent the rotation. This is a common problem.

  The subject of this invention is improving the workability | operativity, when attaching the rotating member between a base member and a cover member, preventing rotation.

  The rotation preventing structure for a rotating part according to claim 1 is for stopping rotation of a part rotatably supported so as to be covered by the lid member between the base member and the lid member detachably attached to the base member. And has a female locking portion provided on the rotating component and a male locking member provided on the lid member. The male locking member is a locking position in which the rotating part is supported between the base member and the lid member, and the locking position for locking to the female locking portion and the locking to the female locking portion are released. The release position can be taken by an operation from the outside of the lid member.

  Here, one end side of the rotating component is first attached to the base member. Next, the male locking member of the lid member is positioned at the unlocking position, and this lid member is attached to the base member. After the lid member is mounted on the base member, the rotating component is rotated to align the female locking portion on the component side and the male locking member on the lid member side. After the positioning is completed, the male locking member is positioned at the locking position by an operation from the outside of the lid member. Thereby, the male locking member on the lid member side is locked to the female locking portion of the rotating component, and the rotation of the component is prevented.

  In this case, since the male locking member can be locked after the component is supported between the base member and the lid member, the component and the lid member are attached to the base member and are used for preventing rotation. The locking of the female locking portion and the male locking member can be performed in separate operations. Accordingly, workability is improved particularly when a plurality of parts are supported between the base member and the lid member.

According to a second aspect of the present invention, in the structure of the first aspect, the female locking portion is a notch.
According to a third aspect of the present invention, in the structure of the first aspect, the female locking portion is a hole.

  According to a fourth aspect of the present invention, in the structure for preventing rotation of a rotating part according to any one of the first to third aspects, the male locking portion is a screw that is screwed into the lid member. In this case, it is possible to lock the screw to the female locking portion or release the locking simply by loosening or tightening the screw, 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.
The rotation preventing structure for a rotating part according to claim 6 is the structure according to any one of claims 1 to 5, wherein the female locking portion is visible in the vicinity of the portion where the male locking portion of the lid member is locked. Openings are provided. In this case, the male locking member can be locked to the female locking portion while confirming the position of the female locking portion from the opening, and workability is further improved.

  As described above, according to the present invention, when attaching a part between the base member and the lid member, the work for attaching the part and the lid member to the base member and the work for preventing the rotation of the part can be performed separately. In particular, workability is improved when a plurality of components are mounted between the booth member and the lid member.

[Copier configuration]
FIG. 1 shows a copier having a drive unit according to an embodiment of the present invention. In the figure, a document table 2 is fixed on the upper surface of the copying machine main body 1. A document presser 3 is mounted on the document table 2 so as to be freely opened and closed. On the other hand, a bypass tray 5a is mounted on the right side of the copying machine main body 1, and paper feed cassettes 5 and 6 are detachably mounted on the left side. 7 is installed. Although not shown, the bypass tray 5a is provided with a bypass lift mechanism, which can reduce the load when paper is fed by pressing and releasing the paper.

  In the copying machine main body 1, an optical system 8 for reading a document is provided on the upper part. A photosensitive drum 9 is disposed at the approximate center of the apparatus main body 1. Around the photosensitive drum 9, there are 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 photosensitive drum 9 to a predetermined charge. Has been placed.

  Further, a bypass paper feeding unit 15a is provided between the image forming unit formed by the photosensitive drum 9 and the like and the bypass tray 5a, and an image forming unit is provided between the image forming unit and the paper feeding cassettes 5 and 6. A paper feeding device 15 for conveying the paper 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 paper transport device 16 is provided on the downstream side of the image forming unit. A fixing device 20 for fixing the toner image on the conveyed paper is provided between the paper transport device 16 and the discharge roller 19.

[Configuration of drive unit]
On the back side of the copying machine main body 1, a photosensitive drum 9, a developing device 11, a bypass paper feeding device 15a, a paper feeding device 15, and a drive unit 30 for driving a bypass lift mechanism (not shown) are provided.

  As shown in FIG. 2, the drive unit 30 includes a base plate 32 in which a drive motor 31 is fixed on the back surface side, and a first divided plate supported by the base plate 32 with a predetermined distance from the base plate 32. 33, a second divided plate 34, a gear train 35 and a plurality of electromagnetic clutches arranged hierarchically between the base plate 32 and the first and second divided plates 33, 34. An input gear 36 to the registration roller is provided outside the first dividing plate 33 (front side in FIG. 2), and an input gear 37 to the sheet feeding device 15 is provided outside the second dividing plate 34. An input gear 38 to the bypass paper feeder 15a is provided.

  FIG. 2 is a view of the drive unit 30 as viewed from the front side of the copying machine. The base plate 32 is disposed on the innermost side of the copying machine, and the drive motor 31 is disposed on the back surface (further back side). Two divided plates 33 and 34 are arranged on the front side of the base plate 32.

Since the gear train 35 of the drive unit 30 is arranged in a hierarchy including a plurality of clutches, 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 40. The first gear train 40 is disposed at a position closest to the base plate 32, and a first gear G1 fixed to the tip of the output shaft of the drive motor 31 and upper and lower second gears G2 meshing with the first gear G1. And a third gear G3, a fourth gear G4 fixed coaxially with the second gear G2, and a fifth gear G5 fixed coaxially with the third gear G3. Each of these gears is rotatably supported on the base plate 32.

[Second gear train]
FIG. 4 shows the second gear train 50 supported by the base plate 32. The second gear train 50 is disposed on the near side of the first gear train 40 and includes a plurality of gears and an electromagnetic clutch.

  The second gear train 50 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 the seventh gear G7 for driving the developing device 11, the high-speed eighth gear G8 of the paper feeding device 15, and the ninth gear G9 for intermediate transmission. The eighth gear G8 is fixed to the rear end surface of the cylindrical first electromagnetic clutch C1. The first electromagnetic clutch C1 is controlled to be turned on / off by a signal from a control unit (not shown). When the first electromagnetic clutch C1 is turned on, the rotation from the eighth gear G8 is transmitted to the central shaft 51 and turned off. The rotation from the eighth gear G8 is not transmitted to the shaft 51.

  The second gear train 50 has a tenth gear G10 for driving the registration rollers that meshes with the ninth gear G9, and an eleventh gear G11 for low speed of the sheet feeding device 15 that meshes with the ninth gear G9. Yes. The tenth gear G10 is fixed to the rear end face of the cylindrical second electromagnetic clutch C2. Further, the eleventh gear G11 is fixed to the rear end face 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), and when the second electromagnetic clutch C2 is on, rotation from the tenth gear G10 is transmitted to the central shaft 52. In the off state, the rotation from the tenth gear G10 is not transmitted to the shaft 52. Further, when the third electromagnetic clutch C3 is on, the rotation from the eleventh gear G11 is transmitted to the central shaft 53, and when the third electromagnetic clutch C3 is off, the rotation from the eleventh gear G11 is not transmitted to the shaft 53.

  Further, the second gear train 50 has a twelfth gear G12 for driving the bypass sheet feeding device 15a that meshes with the eighth gear G8, and a thirteenth gear G13 for driving the bypass lift that meshes with the twelfth gear G12. The twelfth gear G12 is fixed to the rear end surface of the cylindrical fourth electromagnetic clutch C4. The thirteenth gear G13 is fixed to the end face on the back 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. In the off state, the rotation from the twelfth gear G12 is not transmitted to the shaft 54. Further, when the fifth electromagnetic clutch C5 is on, the rotation from the thirteenth gear G13 is transmitted to the central shaft 55, and when it is off, the rotation from the thirteenth gear G13 is not transmitted to the shaft 55. The above gears and shafts are rotatably supported on the 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 the third gear train 60 supported by the base plate 32. The third gear train 60 is arranged in a position closest to the base plate 32 in parallel with the first gear train 40. The third gear train 60 is fixed to the fourteenth gear G14 fixed to the shaft 51 to which the first electromagnetic clutch C1 is attached, and to the shaft 53 to be engaged with the fourteenth gear G14 and to which the third electromagnetic clutch C3 is attached. And a fifteenth gear G15. The third gear train 60 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. The seventeenth gear G17 transmits rotation to another unit for driving the bypass lift mechanism. These gears and shafts are rotatably supported on the base plate 32.

[Split plate]
FIG. 6 shows only the base plate 32 and the first and second divided plates 33 and 34, and other gear trains and electromagnetic clutches are omitted.

  The first dividing plate 33 is a side plate for supporting the sixth gear G6, the seventh gear G7, the ninth gear G9, the tenth gear G10, and the second electromagnetic clutch C2, and is fixed to the base plate 32 with screws or the like. ing. A circular second opening 66 having an outer diameter larger than the outer shape of the second electromagnetic clutch C2 is formed at a portion facing the second electromagnetic clutch C2.

  A clutch support plate 68 is detachably attached to the first divided plate 33 by screws (not shown). The clutch support plate 68 is a member for supporting the second electromagnetic clutch C2. The clutch support plate 68 has mounting portions 68a, 68c, 68b protruding outward on the outer peripheral portion, and is mounted so as to cover the second opening 66. Yes. Thus, by forming the opening 66 in the first divided plate 33 and providing the clutch support plate 68 separately from the first divided plate 33, it is possible to remove the clutch support plate 68 without removing other members. 2 It is possible to attach and detach the electromagnetic clutch C2.

  The second dividing plate 34 includes third, fifth gears G3, G5, eighth, fourteenth gears G8, G14, first electromagnetic clutch C1, eleventh, fifteenth gears G11, G15, third electromagnetic clutch C3, A side plate for supporting the 12th gear G12, the fourth electromagnetic clutch C4, the thirteenth, sixteenth gears G13, G16, the fifth electromagnetic clutch C5 and the seventeenth gear G17, and is fixed to the base plate 32 with screws or the like. . By removing the second divided plate 34 from the base plate 32, the gear or clutch supported on the second divided plate 34 side can be removed without removing the gear or clutch supported on the first divided plate 33 side. .

  Note that the second divided plate 34 can be further divided. That is, when a certain electromagnetic clutch is removed, if the side plate that supports only the gear that interferes with this electromagnetic clutch is divided as a unit, the clutch can be removed only by removing the minimum necessary members when replacing a certain electromagnetic clutch. Can be exchanged.

  Further, it is conceivable to provide a clutch support plate 68 in the first divided plate 33 also on the second divided plate 34 side. Here, a clutch support plate is not provided on the second divided plate 34 side due to a space or the like for forming an opening.

[Positioning mechanism]
Here, the divided plates 33 and 34 and the clutch support plate 68 need to be positioned with high accuracy with respect to the base plate 32. This is because it is necessary to accurately maintain the distance between the axes and 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 provided as positioning members between the base member 32 and each of the divided plates and the like. 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 clutch support plate 68 with respect to the base plate 32. The fourth rod 73 and the fifth rod 74 are for positioning the second divided plate 34 with respect to the base plate 32. And the hole in which each rod is inserted is processed with high precision.

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

[Non-rotating mechanism]
Further, the drive unit 30 is provided with a structure for preventing rotation of each electromagnetic clutch. That is, the electromagnetic clutch can rotate with its central shaft, but each electromagnetic clutch must be prevented from rotating with respect to the base plate 32, the divided plates 33 and 34, or the clutch support plate 68.

  Therefore, in this embodiment, as shown in FIG. 4, first to fifth locking members 81 to 85 are first provided on the front end face of each electromagnetic clutch. Each of the locking members 81 to 85 has 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 locking notch 81a at the protruding portion. As shown in FIG. 6, an opening 86 is formed in a portion where the first electromagnetic clutch C <b> 1 is mounted on the second divided plate 34, and a locking screw 87 is screwed in the vicinity thereof. Further, an opening 88 is formed in a portion where the third electromagnetic clutch C3 is mounted on the second divided plate 34, and a locking screw 89 is screwed in the vicinity thereof. Further, an opening 90 is formed in a portion where the fourth electromagnetic clutch C4 is mounted, and a locking screw 91 is screwed in the vicinity thereof.

  In such a structure, as shown in FIG. 8, the position of the locking member 81 of the first electromagnetic clutch C1 and the position of the locking screw 87 are matched, and the locking screw 87 is tightened. The locking screw 87 can be inserted into the notch 81 a of the locking member 81. Thereby, rotation of the 1st electromagnetic clutch C1 can be stopped. The same applies to the other third electromagnetic clutch C3 and fourth electromagnetic clutch C4.

  As shown in FIG. 6, a locking claw 68 d that is bent toward the base plate 32 is formed on the outer periphery of the clutch support plate 68. This locking claw 68d can be inserted into the notch of the second locking member 82, whereby the rotation of the second electromagnetic clutch C2 is stopped. Furthermore, as shown in FIGS. 3-5, the edge part by the side of the 5th electromagnetic clutch C5 of the base board 32 is bend | folded to the 2nd division board 34 side, and the latching claw 32a is formed in the part. . This locking claw 32a can be inserted into the notch of the fifth locking member 85, and thereby the rotation of the fifth electromagnetic clutch C5 is stopped.

[Operation]
Next, the operation of the drive unit 30 will be described in particular. The operation of the copying machine itself is the same as the normal operation.

<1. Driving 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 fixed coaxially, the fourth gear G4 is similarly rotated by the rotation of the second gear G2. 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. Driving of development device>
[Rotation transmission path: drive motor 31 → third gear G3 = fifth gear G5 → sixth gear G6 → seventh gear G7 → developing device]
The rotation of the drive motor 31 is transmitted to the third gear G3 via the first gear G1. Since the third gear G3 and the fifth gear G5 are fixed coaxially, the fifth gear G5 is similarly rotated by the rotation of the third gear G3. As a result, the sixth gear G6 that meshes with the fifth gear G5 rotates, and the seventh gear G7 that meshes with the sixth gear G6 rotates. The rotation of the seventh gear G7 is input to the developing device.

<3. Driving Registration Roll>
[Rotation transmission path: drive motor 31 → third gear G3 = 5th gear G5 → 6th gear G6 → 9th gear G9 → 10th gear G10 = second electromagnetic clutch C2 = shaft 52 = registration roller input gear 36 → registration roller〕
The rotation transmission operation up to the sixth gear G6 is the same as the driving of the developing device. As the sixth gear G6 rotates, the ninth gear G9 that meshes with the sixth gear G6 rotates, and further, the tenth gear G10 that meshes with the ninth gear G9 rotates. Since the tenth gear G10 is fixed to 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. Feeder drive (low speed)>
The paper feeding device 15 can feed at low speed and high speed. In the case of low speed paper feeding, the third electromagnetic clutch C3 is turned on and the first electromagnetic clutch C1 is turned off.

[Rotation transmission path: drive motor 31 → 3rd gear G3 = 5th gear G5 → 6th gear G6 → 9th gear G9 → 11th gear G11 = third electromagnetic clutch C3 = shaft 53 = feed device input gear 37 → (Paper feeder)
The rotation transmission operation up to the ninth gear G9 is the same as in the case of driving the registration roller. The eleventh gear G11 is rotated by the rotation of the ninth gear G9. 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 transmitted to the shaft 53 via the paper feeding device input gear 37. The paper feeding device 15 is driven. When both the third electromagnetic clutch C3 and the first electromagnetic clutch C1 are off, the paper feeding device is not driven.

<5. Feeder drive (high speed)>
In the case of high-speed paper feeding, the first electromagnetic clutch C1 is turned on and the third electromagnetic clutch C3 is turned off.

[Rotation transmission path: drive motor 31 → 3rd gear G3 = 5th gear G5 → 6th gear G6 → 8th gear G8 = first electromagnetic clutch C1 = shaft 51 = 14th gear G14 → 15th gear G15 = shaft 53 = Feeding device input gear 37 → Feeding device]
The rotation transmission operation up to the sixth gear G6 is the same as described above. By the rotation of the sixth gear G6, the eighth gear G8 meshing with the sixth gear G6 rotates. 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. . And the 15th gear G15 which meshes with 14th gear G14 rotates. Since the fifteenth gear G15 is fixed to the shaft 53, the paper feeding device input gear 37 is rotated by the rotation of the fifteenth gear G15, thereby driving the paper feeding device 15.

  Note that the rotation of the drive motor 31 is also transmitted to the eleventh gear G11 for low-speed paper feeding, as described in the above-described low-speed paper feeding operation. However, in the case of high-speed paper feeding, the third electromagnetic clutch C3 is turned off, so that 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 feeding, the first electromagnetic clutch C1 is turned off.
[Rotation transmission path: drive motor 31 → third gear G3 = 5th gear G5 → 6th gear G6 → 8th gear G8 → 12th gear G12 = fourth electromagnetic clutch C4 = shaft 54 = bypass paper feeder input gear 38 (→ Bypass paper feeder)
The rotation transmission operation up to the eighth gear G8 is the same as described above. Due to the rotation of the eighth gear G8, the twelfth gear G12 engaged therewith rotates. Since the twelfth gear G12 is fixed to the fourth electromagnetic clutch C4, when the fourth electromagnetic clutch C4 is on, the rotation of the twelfth gear G12 is transmitted to the shaft 54, and thereby the bypass paper feeder input gear 38. Rotates, thereby driving the bypass sheet feeder 15a. 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 → 3rd gear G3 = 5th gear G5 → 6th gear G6 → 8th gear G8 → 12th gear G12 → 13th gear G13 = 5th electromagnetic clutch C5 = shaft 55 = 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. Due to the rotation of the twelfth gear G12, the thirteenth gear G13 that meshes therewith 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 thirteenth gear G13 is transmitted to the shaft 55, whereby the sixteenth gear G16 rotates. . And the 17th gear G17 which meshes with this 16th gear G16 rotates, and the bypass lift mechanism provided in another unit is driven by this rotation.

[Replacement of electromagnetic clutch]
When the second electromagnetic clutch C <b> 2 is replaced in the drive unit 30, the screw is loosened and the clutch support plate 68 is removed from the base plate 32 and the first divided plate 33. Since the second opening 66 larger than the outer diameter of the second electromagnetic clutch C <b> 2 is formed in the first divided plate 33, the base plate 32 and the first plate 32 and the second electromagnetic clutch C <b> 2 remain attached to the clutch support plate 68. The second electromagnetic clutch C <b> 2 can be removed from the one divided plate 33. Thereafter, the second electromagnetic clutch C2 may be detached from the clutch support plate 68.

  When the second electromagnetic clutch C2 is mounted again, first, the locking claw 68d of the clutch support plate 68 is locked to the notch of the locking member 82 of the second electromagnetic clutch C2, and the second electromagnetic clutch C2 is then connected to the clutch support plate. Attach to 68. Next, the clutch support plate 68 is fixed to the first divided plate 33 while the second electromagnetic clutch C <b> 2 is inserted into the second opening 66 of the first divided plate 33.

  Thus, when exchanging the second electromagnetic clutch C2, it can be easily attached and detached without removing other gears and clutches. When replacing another electromagnetic clutch, the input gears 37 and 38 are first removed. Next, the screw is 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 divided plate 34 side and the gears that interfere when removing them. In addition, since each electromagnetic clutch and the gear which interferes when removing these are supported by the same 2nd division plate 34, it is also possible to remove with each electromagnetic clutch and gear supported by the 2nd division plate 34. is there.

  When the second divided plate 34 is attached to the base plate 32 again after the electromagnetic clutch has been replaced, the screws 87, 89, 91 for stopping rotation of the electromagnetic clutch are loosened to the state shown by the solid line in FIG. . Then, after supporting the shaft, gear and electromagnetic clutch on the base plate 32, the second divided plate 34 is attached to the base plate 32 while inserting the positioning rod and shaft into the holes of the second divided plate 34.

  Thereafter, the electromagnetic clutches are rotated from the openings 86, 88, 90 formed in the second divided plate 34 while confirming the positions of the electromagnetic clutches, so that the locking members 81, 83, 84 are turned off. The notch and the locking screws 87, 89, 91 are aligned. Then, the locking screw is tightened, and the tip of the screw is locked to the notch of the locking member.

  In this way, after the second divided plate 34 is attached to the base plate 32, each electromagnetic clutch can be prevented from rotating, and the electromagnetic clutch replacement workability and assembling 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. 9, even if a hole 95a into which a locking screw can be inserted is formed in the protruding portion of the locking member 95. Good.

(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 a structure for preventing rotation of an electromagnetic clutch in a driving unit of a copying machine, but also to a structure for preventing rotation of any part that is rotatably supported between a base member and a lid member.

1 is a schematic vertical sectional view of a copying machine having a drive unit according to an embodiment of the present invention. The front view of the said 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. 4 is an exploded front view showing a base plate and a third gear train of the drive unit. The front view which shows the base plate and division | segmentation board of the said drive unit. The front view of the locking member provided in the electromagnetic clutch of the said drive unit. The fragmentary sectional view for demonstrating the effect | action of the said locking member. The figure which shows other embodiment of the said locking member.

Explanation of symbols

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

Claims (6)

A detent structure for stopping rotation of a component that is rotatably supported so as to be covered by the lid member, between the base member and a lid member detachably attached to the base member,
A female locking portion provided on the rotating component;
The locking position provided on the lid member and locked to the female locking portion in a state where the rotating component is supported between the base member and the lid member, and the locking to the female locking portion is released. A male locking member capable of taking the locked release position by an operation from the outside of the lid member;
Non-rotating structure for rotating parts.   The rotating structure for rotating parts according to claim 1, wherein the female locking portion is a notch.   The rotating structure for rotating parts according to claim 1, wherein the female locking portion is a hole.   The rotation stop structure for a rotating component according to claim 1, wherein the male locking portion is a screw that is screwed into the lid member.   The rotation stop structure for a rotating component according to claim 1, wherein the female locking portion is formed on a plate attached to the rotating component.   6. The rotating component according to claim 1, wherein an opening for visually recognizing the female locking portion is provided in a vicinity of a portion where the male locking portion of the lid member is locked. Non-rotating structure.

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