JP2564314Y2 - Paper feeder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeder used for office machines.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a motor 3 is fixed to a support plate 14 and a stud 8 is erected. 5
A gear 17 is rotatably fitted to the stud 8, and a cover 17 facing the support plate 14 is provided with a bearing 17 for rotatably holding the shaft 16 of the paper feed roller 11, and meshes with the gear 6. There is a paper feeder in which the gear 7 is fixed to the shaft 16 of the paper feed roller 11 and the other end of the paper feed roller 11 is rotatably held by a frame (not shown).

[0003] Although basically the same as that shown in FIG. 3, as shown in FIG. 4, an opening 18 for opening the end of the paper feed roller 11 is formed in the cover 15 to support The plate 14 is provided with a bearing 17 for rotatably supporting the shaft of the paper feed roller 11 and a paper feed device in which the gear 7 is fixed to an end of the shaft of the paper feed roller 11.

[0004]

[Problems to be Solved by the Invention] Conventional paper feeders are:
In each case, the rotation of the motor 3 is transmitted to the paper feed roller 11 via the gears 5, 6, and 7, and the paper is nipped and conveyed by the paper feed roller 11 and a pressure roller (not shown). On the other hand, the paper feed roller 11 and the pressing roller have a reduced conveying force due to the adhesion of paper powder and the like, and therefore need to be replaced periodically. The press roller simply follows the paper feed roller 11 and can be separated from the power transmission mechanism. However, since the paper feed roller 11 on the drive side is connected to the gear 7 serving as the output part of the power transmission mechanism, the roller is replaced At this time, it must be separated from the gear 7.

However, the gear shown in FIGS. 3 and 4 is assembled by engaging the gear 7 with the shaft 16 of the paper feed roller 11 and engaging it with the intermediate gear 6, so that the motor 3 and the gear 5, 6, 7, the support plate 14 and the cover 15 cannot be unitized as a power transmission mechanism, and the disassembling and assembling work of the paper feed roller 11 in maintenance is troublesome.

[0006]

Together are meshed plurality of gears that are more drive <br/> movement to the motor supporting holding plates SUMMARY OF THE INVENTION rotatably mounted in, to secure the cover that covers the gear to the support plate To form a power transmission unit, one end of which is fixed in the rotational direction to the other end of the paper feed roller supported by the frame and the end face of the central portion of the final gear in the gear of the power transmission unit, and is axially fixed. Forming a fitting part that is detachably fitted,
When inserting the end portion of the paper feed roller to the cover bets
An opening having an inner diameter smaller than the outer diameter of the final gear was formed.

[0007]

A plurality of gears are always maintained in a meshed state and assembled together with a support plate and a cover as a power transmission unit, and a paper feed roller is removably fitted in an axial direction to a final gear of the power transmission unit. Therefore, during maintenance, only the paper feed roller can be easily replaced without disassembling the power transmission unit.
When replacing the paper feed roller, cover multiple gears.
Maintain the meshing state in the power transmission unit while covering
User touches the gear connected to the motor
There is no danger and there is no
Ru it is possible to prevent the occurrence of the table in advance.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The same parts as those described in FIGS. 3 and 4 will be omitted by using the same reference numerals. 1 is a power transmission unit. The power transmission unit 1 has a gear 5 fixedly fitted to a rotating shaft 4 of a motor 3 fixed to a support plate 2, and a gear 6 meshed with the gear 5 and a gear 7 meshed with the gear 6. Are formed on the support plate 1 with a stud 8 rotatably supported by the support plate 1, and a cover 9 covering these gears 5, 6, 7 is connected to the support plate 2. The cover 9 has an opening 10 facing the end face of the gear 7. Reference numeral 11 denotes a paper feed roller.
A bearing (not shown) for rotatably supporting one end of the first member 1 is held by a frame (not shown) arranged to face the cover 9 at a predetermined interval. The end face of the final gear 7 among the plurality of gears 5, 6, 7 and the end of the paper feed roller 11 are fixed in the rotating direction and detachably fitted in the axial direction. Parts 12 and 13 are formed. In this embodiment, the fitting portion 13 is a modified shaft having a D-shaped cross section, and the other fitting portion 12 is a boss having a D-shaped hole.

In such a configuration, the paper feed operation is performed by transmitting the rotation of the motor 3 to the paper feed roller 11 via the gears 5, 6, and 7. Here, the plurality of gears 5, 6, and 7 are always maintained in a meshed state and are assembled together with the motor 3, the support plate 2 and the cover 9 as the power transmission unit 1. Since the power transmission unit 1 is detachably fitted to the gear 7 in the axial direction, only the paper feed roller 11 can be easily replaced without disassembling the power transmission unit 1. Since the gears 5, 6, and 7 are assembled between the support plate 2 and the cover 9, the user can use the gears 5, 6, and 7.
It is possible to avoid the risk touching the 7, also, gear 5,
It is also possible to prevent a trouble caused by dropping a foreign substance on the meshing portions 6 and 7.

[0010]

This invention, according to the invention] is mutually are meshed plurality of gears more driven motor rotatably mounted on the support plate,
A power transmission unit is formed by fixing a cover that covers the gear to the support plate, and one end of a paper feed roller having one end supported by a frame and a central portion of a final gear in the gear of the power transmission unit . a fitting portion to be removably fitted in a fixed axial to the rotational direction and the end face forming, with inserting the end portion of the paper feed roller to the cover
Since the opening having an inner diameter smaller than the outer diameter of the final gear is formed, the plurality of gears are always maintained in a meshing state and are assembled together with the support plate and the cover as a power transmission unit. Since it is detachably fitted to the final gear in the axial direction, only the paper feed roller can be easily replaced without disassembling the power transmission unit during maintenance. The gear of the cover
Maintain the meshing state in the power transmission unit while covering
User touches the gear connected to the motor
There is no danger and there is no
This has the effect of preventing the occurrence of bulls .

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional side view thereof.

FIG. 3 is an exploded perspective view showing a conventional example.

FIG. 4 is an exploded perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power transmission unit 2 Support plate 3 Motor 5-7 Gear 9 Cover 10 Opening 11 Paper feed roller 12, 13 Fitting part

Claims (1)

(57) [Scope of request for utility model registration] 1. A one another by meshing a plurality of gears that more is driven by a motor rotatably mounted on a support plate, wherein the securing the cover for covering the gear to form a power transmission unit to the supporting plate, one end A fitting portion which is fixed in the rotation direction to the other end of the paper feed roller supported by the frame and the end surface of the central portion of the final gear in the gear of the power transmission unit, and which is detachably fitted in the axial direction. forming a said file with inserting the end portion of the paper feed roller to the cover
A paper feed device wherein an opening having an inner diameter smaller than an outer diameter of a null gear is formed.