JPH05327969A - Recorder with driving mounted using non-contact bearing - Google Patents

Abstract

PURPOSE:To prevent a rotational shaft and a fixed shaft from being locked in a recorder which the shafts are locked when vibration or an impact is applied at the time of stopping start like a polygon scanner using the dynamic pressure fluid bearing of a digital copying machine. CONSTITUTION:A seal 16 which notices are printed is adhered on the side surface 11a of a recorder mainbody 11 providing a scanner driving device 12 which the dynamic fluid bearing polygon scanner 13 is incorporated. The notices are printed on the surface of the seal 16 and they are read since they are within the sight of an operator at the time of operating a power source switch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device such as a digital copying machine in which a drive device using a non-contact bearing for driving a rotating body which scans a light beam is mounted in a device main body, and more particularly, to a main body of the device. Regarding the display of handling precautions for avoiding vibration or shock.

[0002]

2. Description of the Related Art In recent years,
There is an increasing demand for higher rotational accuracy in laser printers, digital copiers, and fax machines. Therefore, instead of the conventional ball bearing, a polygon scanner using a non-contact bearing, that is, a hydrodynamic bearing type has been put into practical use in terms of life, noise, rotational accuracy, and the like.

As shown in FIG. 4, the hydrodynamic bearing type is composed of a rotary shaft 1, a fixed shaft 2 and a pedestal 3. Before the start, the rotary shaft 1 and the fixed shaft 2 are in contact with each other. When the rotary shaft 1 is turned on and starts rotating, the pressure of air in the bearing clearance increases in proportion to the number of rotations, and the rotary shaft 1 and the fixed shaft 2 are normally out of contact with each other at 1,000 rpm or less. The steady rotation of 20,000 rpm or more is reached within 15 seconds after starting. Then, when the recording apparatus is turned off, the rotation speed decreases from the steady rotation as shown in FIG. 5, and the air pressure in the bearing clearance accordingly decreases, and the rotation shaft 1 and the fixed shaft are normally rotated at 1,000 rpm or less. Two touch. The rotary shaft 1 stops about 100 seconds after the power is turned off.

FIG. 6 is a graph showing the vibration resistance when the polygon scanner is stopped, but the vibration resistance value remarkably decreases as the rotation speed decreases. When an external force such as vibration or impact is applied while the vibration resistance value is lowered, the rotation shaft 1 and the fixed shaft 2 may come into contact with each other to cause locking (galling or seizure). The contact between the rotary shaft 1 and the fixed shaft 2 occurs even during normal start-up and stop operations, but the rotation speed is low, so the lock does not occur, and the lock occurs at a relatively high speed when the rotary shaft 1 rotates.
And the fixed shaft 2 contact each other. Since the pressure of air in the bearing clearance increases in proportion to the number of revolutions, it becomes more difficult for the rotating shaft 1 and the fixed shaft 2 to come into contact with each other as the rotation speed increases, but when external forces such as vibration and shock are applied, the rotating shaft 1 and the fixed shaft 2 2 becomes easy to contact.

As described above, in the polygon scanner of the recording apparatus equipped with the hydrodynamic bearing type polygon scanner, it is necessary to take care not to apply external force such as vibration and impact during operation. No kind of caution was displayed on the recording device of this kind.

The present invention has been made in view of the above-mentioned problems of the prior art, and an external force is artificially applied when a drive unit using a hydrodynamic bearing which is a non-contact type bearing mounted in a recording apparatus is started and stopped. SUMMARY OF THE INVENTION It is an object of the present invention to provide a recording apparatus provided with means for preventing the lock of a rotating shaft and a fixed shaft that occurs in advance.

[0007]

In order to solve the above problems, a recording apparatus equipped with a driving device using a non-contact bearing according to the present invention has a non-contact bearing for driving a rotating body which scans a light beam. In a recording device in which the drive unit used is mounted in the main body of the apparatus, a display body of handling precautions for urging that the operation of applying vibration or impact to the main body of the apparatus is not performed during the operation of the rotating body The drive device using a non-contact bearing, which is provided at an arbitrary position on the outer surface of the main body, is mounted.

In order to solve the above problems, a recording apparatus equipped with a driving device using a non-contact bearing according to the present invention uses a driving device using a non-contact bearing for driving a rotating body that scans a light beam. In the recording device mounted on the main body,
A display device having a display function of handling precautions for urging that the operation of applying vibration or impact to the device body is not performed during the operation of the rotating body is provided at an arbitrary position on the outer surface of the device body. It is also possible to adopt a configuration in which a drive device using a non-contact bearing is mounted.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of a recording apparatus equipped with a drive device using a non-contact bearing according to the present invention. In FIG. 1, 10 is a recording device, 11 is an apparatus main body, 12 is a scanner driving device, and the scanner driving device 12 has a hydrodynamic bearing polygon scanner 13 built therein. Further, the side surface 11a of the apparatus main body 11 on the side of the discharge tray 14
The power switch 15 is provided in the
Immediately below the label is a sticker 16 on which precautions are printed.

2a and 2b are enlarged plan views of the seal 16 shown in FIG. 1, in which precautions 17 and 17a are printed on the surface, and when the power switch 15 is operated, the operator's eyes enter the eye. Therefore, the notes can be read. In order to call the operator's attention, it is advisable to adopt a color completely different from the appearance color of the apparatus main body 11. In addition, seal 1
The sticking position of 6 is not limited to the position shown in the illustrated example, and may be anywhere on the apparatus main body 11 as long as it is easily visible to the operator.

FIG. 3 is a partial perspective view showing a second embodiment of a recording apparatus equipped with a driving device using a non-contact bearing according to the present invention. In FIG. 3, a liquid crystal display 23 is provided on an operation panel 22 provided on the front upper surface of the apparatus main body 21 of the recording apparatus 20, and the liquid crystal display 23 is the same as or similar to the precautions 17 and 17a of FIGS. A warning is displayed. Although not shown, the apparatus main body 21 incorporates a hydrodynamic bearing polygon scanner similar to the apparatus shown in FIG.

Next, the operation of this embodiment will be described. When the operator turns off the power switch 15, the rotation of the hydrodynamic bearing type polygon scanner slows down. At this time, the liquid crystal display 23 displays a caution 17 (or 17a) with a buzzer sound, and when the polygon scanner is completely stopped. The buzzer sounds again and all power is turned off. Similarly, when the power switch is turned on, the caution 17 (or 17a) is displayed, and the display disappears when the polygon scanner reaches steady rotation.
A conventionally known sensor device, display drive device, or the like may be used to control the start and end of such a display operation, and thus a detailed description thereof will be omitted.

It should be noted that "10" showing the stop time of the hydrodynamic bearing type polygon scanner described in the precautions 17 and 17a is shown.
The value of "0 second" varies depending on the ifucha of the rotating body of the scanner and the bearing structure.

[0014]

As described above, the recording apparatus according to the first and second aspects of the present invention can be operated at the time of starting or decelerating by providing the display of the handling precautions or the display function at an arbitrary position of the recording apparatus. It becomes possible to call attention to the operator so as not to apply external force such as artificial vibration or impact during the period when the vibration resistance of the device using non-contact bearing such as pressure fluid bearing is low. This has the effect of preventing the fixed shaft from locking before it occurs.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a recording apparatus equipped with a drive device using a non-contact bearing according to the invention.

FIG. 2 is an enlarged plan view showing the written contents of the seal shown in FIG.

FIG. 3 is a perspective view showing a second embodiment of a recording apparatus equipped with a driving device using a non-contact bearing according to the invention.

FIG. 4 is a sectional view showing a schematic structure of a hydrodynamic bearing.

FIG. 5 is a graph showing the rotational speed reduction characteristics of the hydrodynamic bearing after the power is turned off.

FIG. 6 is a graph showing vibration resistance when a polygon scanner using a hydrodynamic bearing is stopped.

[Explanation of symbols]

 10, 20 Recording device 11, 21 Device main body 12 Scanner drive device 13 Dynamic pressure fluid bearing polygon scanner 14 Paper ejection tray 15 Power switch 16 Seal 17, 17a Precautions 22 Operation panel 23 Liquid crystal display

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI Technical indication location G03G 15/00 103 (72) Inventor Yukio Itami 1-3-6 Nakamagome, Ota-ku, Tokyo Stocks Inside Ricoh Company (72) Inventor Yoshihiro Takahashi 3-1 Shinmeidou Nakameisei, Shibata-cho, Shibata-gun, Miyagi Inside Tohoku Ricoh Co., Ltd.

Claims (2)

[Claims] 1. A recording apparatus comprising a drive unit using a non-contact bearing for driving a rotating body that scans a light beam, wherein the rotating body is operated to apply vibration or impact to the apparatus body. A recording device equipped with a drive device using a non-contact bearing, characterized in that a display body for handling precautions is displayed at an arbitrary position on the outer surface of the main body of the device to urge it not to be performed during the operation. 2. A recording device comprising a drive unit using a non-contact bearing for driving a rotating body that scans a light beam, wherein the rotating body performs an operation of applying vibration or impact to the apparatus body. A recording device equipped with a drive device using a non-contact bearing, characterized in that a display device having a function of displaying a caution to be urged not to be performed during the operation of the device is provided at an arbitrary position on the outer surface of the device body. ..