JPH088399Y2 - Oil bath lubricator for drive transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention accommodates a drive transmission device having a gear fixed to a gear mounting shaft supported by a side plate through a bearing,
The present invention relates to an oil bath lubrication device for a drive transmission unit in which at least a lower portion of the gear is allowed to bathe in the lubricating oil stored in the oil bath case.

PRIOR ART Oil bath lubricators of the type described above are well known and are provided in the drive connection of various machines. As a method for sealing lubricating oil in this type of device, an oil seal, a seal ring, or the like is generally used in the shaft portion, and an O-ring or the like is used in a joint or the like of the housing.

Although these sealing methods can obtain fairly good sealing performance, they are poor in assembling performance and increase in assembly cost. Moreover, if the assemblability is poor, the workability in maintenance such as replacement of the lubricating oil and replacement of the sealing material becomes poor. Further, the above-mentioned sealing method has a problem that the cost of parts such as all-seal is also high.

In order to solve this problem, Japanese Utility Model Laid-Open No. 1-125444 discloses a shield plate which is attached to a cover and extends downward in the oil sump box. , An oil bath lubrication device arranged to face the drive transmission device.

However, this oil bath lubrication device has a problem that the lubricating oil leaks from the side surface of the gear to the outside of the oil bath case along the gear mounting shaft.

DISCLOSURE OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION The present invention aims to provide an oil bath lubrication device which can solve the above-mentioned conventional problems and prevent leakage of lubricating oil.

Means for Solving the Problems The constitution of the present invention which achieves the above object is as follows.

A drive in which a drive transmission device having a gear fixed to a gear mounting shaft supported by a side plate through a bearing is housed, and at least a lower portion of the gear is adapted to make an oil bath with lubricating oil stored in an oil bath case. In the oil bath lubricator of the transmission part,
A seal member made of an elastic material that surrounds an upper region of the gear mounting shaft is provided in a gap between the side surface of the gear and the oil bath case, and both ends of the seal member extend below the gear mounting shaft. Lubrication device.

Action According to the above configuration, by providing the seal member,
The lubricating oil can be prevented from being transmitted from the side surface of the gear to the gear mounting shaft, and the lubricating oil soaked into the seal member can be returned to the oil pan through the outside of the facing portion of the side cover. Furthermore, since both ends of the seal member extend below the gear mounting shaft, it is possible to prevent the sealing member from going around the gear mounting shaft.

Embodiment Hereinafter, the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an outline of a color copying machine to which the present invention can be applied to a driving unit. The copying machine includes a scanner unit 1 for reading a document, an image processing unit 2 for electrically processing an image signal output from the scanner unit 1 as a digital signal,
The printer unit 3 forms an image on copy paper based on the image recording information of each color from the image processing unit 2. The scanner unit 1 has a lamp 5 for scanning and illuminating an original on the original table 4, for example, a fluorescent lamp. The reflected light from the document when illuminated by the fluorescent lamp 5 is reflected by the mirrors 6, 7, 8 and enters the imaging lens 9. The image light is imaged on the dichroic prism 10 by the imaging lens 9, and is split into light of three kinds of wavelengths, for example, red R, green G, and blue B, and a light receiver 11, for example, CCD 11R for red for each wavelength light. Is incident on the green CCD 11G and the blue CCD 11B. Each of the CCDs 11R, 11G, and 11B converts incident light into a digital signal and outputs the digital signal. The output is subjected to necessary processing in the image processing unit 2, and recording color information of each color, for example, black (hereinafter abbreviated as Bk) , Yellow (abbreviated as Y), magenta (abbreviated as M), and cyan (abbreviated as C) are converted into signals for recording formation.

FIG. 1 shows an example of forming four colors of Bk, C, M and Y, but it is also possible to form a color image with only three colors. In that case, the number of recording devices can be reduced by one from the example of FIG.

The signal from the image processing unit 2 is input to the printer unit 3 and the laser light emitting devices 12Bk, 12C, 12M and 12Y of the respective colors are input.
Sent to

In the printer section, four sets of recording devices 13Bk, 13
C, 13M and 13Y are arranged side by side. Since each recording device 13 is composed of the same constituent member, only the recording device for C will be described and the other colors will be omitted in order to simplify the description. Note that, for each color, the same portions are denoted by the same reference numerals, and in order to distinguish the configuration of each color, the reference numerals are attached to indicate each color.

The recording device 13C includes a photoconductor 14 in addition to the laser light emitting device 12C.
C, eg having a photoconductor drum.

The photoconductor 14C includes a charging charger 15C, an exposure device using a laser light emitting device 12C, a developing device 16C, and a transfer charger 17.
C and the like are attached in the same manner as a known copying machine.

Photoconductor 14C uniformly charged by charging charger 15C
Forms a latent image of a cyan light image by the laser light emitting device 12C and develops it by the developing device 16C to form a visible image.
The copy paper supplied from the paper supply unit 19, for example, one of the two paper supply cassettes, by the paper supply roller 18 is transferred to the transfer belt 21 at the same timing when the leading ends are aligned by the registration rollers 20.
Sent to The copy paper conveyed by the transfer belt 21 is
The images are sequentially sent to the photoconductors 14Bk, 14C, 14M, and 14Y on which the developed images are formed, and the developed images are transferred under the action of the transfer charger 17. The transferred copy paper is fixed by the fixing roller 22 and discharged by the paper discharge roller 23.

By being electrostatically attracted to the transfer belt 21, the copy paper can be accurately conveyed at the speed of the transfer belt.

FIG. 2 is a plan sectional view showing the outline of the drive unit of the photoconductor 14.

The photoconductor 14 rotates integrally with the photoconductor support shaft 24 via a flange 27 fixed to the photoconductor support shaft 24 as a gear mounting shaft as a rotation shaft. The photoconductor support shaft 24 is rotatably supported by a supporter 26 attached to the main body side plate 25 via a bearing 39, and a worm wheel 28 as a gear is fixed. Further, a worm shaft bracket 33 as a side plate is attached to the supporter 26,
The worm 29 is attached to the worm wheel 30 of the worm shaft 30 supported by the shaft support portion 34 at a corresponding position. The timing belt drive unit 32 is attached to one end of the worm shaft 30.
Is provided, and the photoconductor is rotated by the motor 31. Also,
An oil bath lubrication device 35 for sealing lubricating oil is attached to the drive transmission device configured as each worm drive device. The photosensitive member support shaft 24 is supported by a supporter 26, and a collar 42 holds backlash in the thrust direction.

As shown in FIG. 3, the oil bath lubrication apparatus 35 according to the present invention has an oil bath case 38 having an oil storage box portion 36 storing a lubricating oil 40 and a cover for covering the oil storage box portion 36. There is.

In the oil bath case 38, the worm wheel 28 fixed to the above-mentioned photoreceptor support shaft 24 and the worm 29 fixed to the worm shaft 30 are accommodated, and the lower portion of the worm wheel 28 is immersed in the lubricating oil 40. . The oil reservoir box 36 has a step 36
a is formed, and the level of the lubricating oil 40 is adjusted to the stepped portion 36a so that the stored amount of the lubricating oil 40 serves as a guide.

By the way, the lubricating oil 40 may leak from the side surface of the worm wheel 28 along the photoconductor support shaft 24 to the outside of the oil bath case 38.

Therefore, in the present invention, as shown in FIGS. 3 and 4, the oil bath case 38 includes the oil sump box 36, the oil pan 43 and the side cover.
44 and the oil reservoir box portion 36 is covered with an upper cover 37. That is, the oil bath case 38 is divided into three members, the oil pan 43, the side cover 44, and the upper cover 37. In this case, in the oil pan 43 and the side cover 44, the oil pan 43 surrounds the lower half of the bearing 39, and the side cover 44 covers the bearing 39.
Is formed so as to surround the upper half.

The oil pan 43 has an upper portion on which the insertion portion 4 to be inserted into a claw 44c described later on the surface facing the worm shaft bracket 33.
A mounting portion 43b for screwing the worm shaft bracket 33 to the worm shaft bracket 33 is provided in the lower portion of the 3a. In addition, the side cover 44 has an abutting part on the surface facing the worm shaft bracket 33.
On the surface of the shaft 44a facing the worm wheel 28, there is formed a facing portion 44b surrounding the upper region of the shaft 30 and having both ends extending downward from the shaft 30. In addition, the side cover 44 has an oil pan.
Claw 44c that holds 43 and worm shaft bracket 3 on both sides
3 is provided with a mounting portion 44d for screwing.

Therefore, as shown in FIG. 5, the facing portion of the side cover 44
44b, so as to eliminate the gap with the worm wheel 28,
A seal member 47 made of an elastic material such as sponge is provided. The seal member 47 surrounds the upper region of the photoconductor support shaft 24, and both ends of the seal member 47 are provided so as to extend below the photoconductor support shaft 24.

Thus, by providing the seal member 47, the lubricating oil
It is possible to prevent 40 from leaking from the side surface of the worm wheel 28 along the photoconductor support shaft 24 to the outside of the oil bath case 38. Moreover, the lubricating oil 40 that has penetrated into the seal member 47 is
Since it is returned to the oil pan 43 through the outside of the facing portion 44b and both ends of the seal member 47 extend below the photoconductor support shaft 24, they do not go around the photoconductor support shaft 24.

Although the present invention has been described with reference to the embodiment of the drive section of the copying machine, it can be applied to oil bath lubrication of all drive sections, and the drive transmission section is not limited to the worm drive apparatus, and various drive transmission apparatuses for oil baths can be used. Is applicable to.

Effect According to the above configuration, since the oil bath lubrication device of the present invention is provided with the seal member, the lubricant oil can be prevented from being transmitted from the side surface of the gear to the gear mounting shaft, and the lubricant oil soaked into the seal member can be prevented from flowing into the side portion. It could be returned to the oil pan through the outside of the cover opposite. Furthermore, since both ends of the seal member extend below the gear mounting shaft, it is possible to prevent the seal member from going around the gear mounting shaft.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a color copying machine to which the present invention is applied, and FIG. 2 is a plan sectional view showing an outline of driving of a photoconductor.
3 is an enlarged sectional view of the present invention, FIG. 4 is an exploded perspective view of an oil bath case, and FIG. 5 is a front view of a side cover. 28 ... Worm wheel 29 ... Worm 35 ... Oil bath lubricator 36 ... Oil reservoir box 37 ... Top cover 38 ... Oil bath case 39 ... Bearing 43 ... Oil pan 44 ... Side cover 47 ... Seal member

Claims (1)

[Scope of utility model registration request] 1. A drive transmission device having a gear fixed to a gear mounting shaft supported on a side plate via a bearing,
In an oil bath lubrication device of a drive transmission part, wherein at least a lower portion of the gear is allowed to bathe in the lubricating oil stored in the oil bath case, in a gap between the gear side surface and the oil bath case, an upper region of the gear mounting shaft. An oil reservoir lubrication device, characterized in that a seal member made of an elastic material is provided surrounding the seal member, and both ends of the seal member extend below the gear mounting shaft.