JPH0619193B2 - Support device for electromagnetic clutch - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a supporting device for an electromagnetic clutch that prevents entrainment of an electromagnetic clutch that interrupts the rotational force of a rotating shaft, and relates to a feeding device of a copying machine, for example. The present invention relates to an electromagnetic clutch support device applicable to an electromagnetic clutch.

(Prior Art) A rotary type electromagnetic clutch (hereinafter simply referred to as "electromagnetic clutch") is known as a means for interrupting the rotational force of a rotary shaft in a sheet feeding device of a copying machine.

Conventionally, when a plurality of the electromagnetic clutches are arranged on a plurality of rotating shafts adjacent to each other, a supporting device for the electromagnetic clutches for preventing the electromagnetic clutches from rotating together has a plurality of pins on a supporting side plate of the rotating shaft. And each of these pins is individually engaged with the detent arm provided in each electromagnetic clutch.

(Problem to be Solved by the Invention) Since this conventional electromagnetic clutch support device is provided individually for a plurality of electromagnetic clutches, the structure and assembly become complicated as the number of parts increases, and the cost is high. There is a problem that it is required to secure the assembling accuracy.

(Means for Solving the Problems) The present invention is a support device for an electromagnetic clutch that is provided on a plurality of parallel rotating shafts that are adjacent to each other and that interrupts rotation to each of the rotating shafts. It is characterized in that the tip ends of the detent arms provided in each casing are connected to each other to prevent the electromagnetic clutches from rotating together.

(Operation) Since the casings of the electromagnetic clutches, which are respectively provided on the parallel rotating shafts adjacent to each other, are provided with the anti-rotation arms having the unevenness, and the unevennesses are engaged with each other, the electromagnetic clutches depend on the rotating shafts. Even when a rotational force is applied, the concavo-convex engagement of the detent arm prevents the electromagnetic clutches from rotating together.

(Embodiment) FIG. 1 shows a line in which the present invention is applied to electromagnetic clutches cl1 and cl2 arranged on rotary shafts 1 and 2 of a sheet feeding device of a copying machine.

The rotary shaft 1 is a support shaft of the separation roller 3, and the rotary shaft 1
The rotational force of the feeding roller 4 is generated by the gears G1, G2 and G3.
Be transmitted to. The rotating shaft 2 is a support shaft of the lower conveying roller 5, and the rotational force of the rotating shaft 2 is transmitted to the lower separating roller 6 by the gears G4, G5, G6 and G7. Each of these rotary shafts 1 and 2 includes a drive motor (not shown), a timing belt 7 that transmits these rotational forces, a timing pulley 8,
Gear G8, gear G9 and each electromagnetic clutch cl1, cl
Each of them is rotated by a driving means composed of two input gears G10 and G11.

The sheet feeding device configured as described above feeds the sheet S to the belt-shaped photoconductor 103 stretched between the driving roller 101 and the driven roller 102 as shown in FIG. 2 at a predetermined timing. Need to send. Therefore, the sheet feeding roller 4 that feeds the sheet S from the stacking portion and the lower feeding roller 5 that feeds the fed sheet S to the belt-shaped photoconductor 103 are used in the image forming process on the belt-shaped photoconductor 103. It is driven at predetermined different timings for synchronization.

The electromagnetic clutches cl1 and cl2 are provided as means for controlling the drive timing of the paper feed roller 4 and the lower transport roller 5. That is, the electromagnetic clutch cl1 has the second
As shown in the figure, the neutralization device 104, the cleaning device 105, the charging charger 106, the exposure device 107, and the developing device 108 act on the belt-shaped photoconductor 103 according to a predetermined image forming process, and It is excited while the toner image is formed. When the electromagnetic clutch cl1 is excited, the rotational force of the input gear G10 is transmitted to the rotary shaft 1 via the armature 14 and the rotor 18, which will be described later. The separation roller 3 is rotated in the direction of the arrow a along with the rotation of the rotary shaft 1, and the rotational force of the rotary shaft 1 is transmitted to the paper feed roller 4 via the gears G1, G2, and G3 to feed the paper. The roller 4 is rotated in the direction of arrow a. The stacked uppermost sheet S is pushed up and brought into contact with the sheet feeding roller 4 together with the bottom plate 10 by the lever 11 so that the sheet S is delivered by the rotational force of the sheet feeding roller 4 and the frictional force with the sheet. .

On the other hand, the electromagnetic clutch cl2 is excited at substantially the same time as the electromagnetic clutch cl1, and transmits the rotational force of the input gear G11 to the rotary shaft 2 via the armature 14 and the rotor 18. The lower conveying roller 5 is rotated in the direction of the arrow b with the rotation of the rotary shaft 2, and the rotational force of the rotary shaft 2 is changed to the gear G.
It is transmitted to the lower separation roller 6 via 4, G5 and G6, and this lower separation roller 6 is rotated in the direction of arrow c, that is, in the same direction as the separation roller 3.

As for the sheet S delivered by the sheet feeding roller 4, only the uppermost one sheet S is fed by the separating roller 3, and the lower separating roller 6 rotating in the direction of arrow C The uppermost one sheet S is prevented from advancing, and the lower conveyance roller 5 and the conveyance roller 9 which is pressed against the lower conveyance roller 5 and is driven to rotate.
Delivered during.

When the sensor SW detects the leading edge of the sheet S that has been conveyed by the lower conveyance roller 5 and the conveyance roller 9, the electromagnetic clutches cl1 and cl2 are both deenergized, and the sheet S stands by in the sheet guide 12. In this state, when the tip of the toner image formed on the belt-shaped photoconductor 103 reaches a predetermined position, only the electromagnetic clutch cl2 is excited again. As a result, the lower conveying roller 5 and the conveying roller 9 rotate again, and the sheet S, which has been waiting, is transferred to the belt-shaped photosensitive member 10.
3, the toner image is transferred onto the sheet S by the transfer charger 109. Each electromagnetic clutch cl
1, 1 and 2 are normally configured as shown in FIG. 3, the rotational force transmitted to the input gears G10, (G11) is transmitted to the armature 14 via the armature hub 13. The rotational force of the armature 14 is transmitted to the rotary shafts 1, (2) via the rotor 18 only when the coil 15 is energized to excite the casing 16 forming the field core and the armature 14 is attracted to the facing 17. To be done. Here, the input gear G1
0 and (G11) are rotatably attached to the rotating shafts 1 and (2) via an armature hub 13 and a bush 19. Further, the armature 14 is engaged with the armature hub 13 via a key (or a spline) so as to be capable of thrust movement.

On the other hand, the rotor 18 is fixed by the screw 20 to the rotary shaft 1,
It is fixed to (2) and is supported by a bearing 21 separately from the casing 16 and the coil 15 so as to be rotatable with respect to the casing 16 and the coil 15 in the casing 16 forming the field core. An end plate 16a forming a part of the casing 16 is integrally provided at one end of the casing 16.

Anti-rotation arms A1, (A2) are fixed to the casing 16 of the electromagnetic clutches cl1, (cl2).
As shown in FIGS. 1 and 4, the electromagnetic clutch cl1
Anti-rotation arm A1 formed in a convex shape provided on the
And the anti-rotation arm A2 formed in the concave shape provided in the other electromagnetic clutch cl2 are formed in a concavo-convex shape that can be fitted to each other. These detent arm A1
The detent arm A2 and the detent arm A2 can be locked to each other by the detent arm A2 and the detent arm A1.

The electromagnetic clutches cl1 and cl in the above embodiment
The radii r1 and r2 of the two input gears G10 and G11 and the inter-axis distance D of the rotary shafts 1 and 2 are set so that the relationship of r1 + r2 <D is maintained. Where r1
When + r2 ≧ D, the input gears G10, G1
In order to prevent the mutual interference of No. 1 with each other, it is necessary to shift the positions of the gears G10, G11 on the rotary shafts 1, 2 in the thrust direction. In this case, each detent arm A1, A2
Occupy positions displaced from each other in the thrust direction, so that they cannot be connected to each other as they are. Therefore, in the detent arms A1 and A2 in this case, as shown in FIG. 5, for example, the tip end of one detent arm A1 '(the detent arm A2' may be a claw) is bent in the thrust direction. It is configured to be connected to each other by bending.

As the detent arm, for example, as shown in FIG. 6, both detent arms A1 ″ and A2 ″ are formed in the same shape, and these detent arms A1 ″ and A2 ″ are formed.
Electromagnetic clutch cl so that they can be fitted together
It may be fixed to the end plate 16a forming a part of the casing 16 of 1 and cl2.

(Effects of the Invention) According to the present invention, it is possible to prevent a plurality of electromagnetic clutches from rotating together without increasing the number of parts, and it is possible to achieve an effect that the structure is simple and the assembly is easy. .

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a schematic view of a copying machine having the above embodiment, FIG. 3 is a half sectional view showing an essential part of the embodiment, and FIG. FIG. 5 is a rear view showing a main part of the above embodiment, FIG. 5 is a perspective view of a main part of another embodiment of the present invention, and FIG. 6 is a perspective view of a main part of still another embodiment of the present invention. 1, 2 ... Rotating shafts, cl1, cl2 ... Electromagnetic clutch,
A1, A2, A1 ', A2', A1 ", A2" ... Rotation stop arm

Claims (1)

[Claims] 1. A support device for an electromagnetic clutch, which is provided on a plurality of parallel rotating shafts adjacent to each other and interrupts rotation to each of the rotating shafts, wherein the electromagnetic clutches are arranged adjacent to each other, A support device for an electromagnetic clutch, comprising: a rotation preventing arm having irregularities, which is provided on a casing of each of the electromagnetic clutches, and the irregularities are engaged with each other to prevent the casings from rotating.