JPH08202206A - Image carrier for image forming device - Google Patents
Image carrier for image forming deviceInfo
- Publication number
- JPH08202206A JPH08202206A JP1180495A JP1180495A JPH08202206A JP H08202206 A JPH08202206 A JP H08202206A JP 1180495 A JP1180495 A JP 1180495A JP 1180495 A JP1180495 A JP 1180495A JP H08202206 A JPH08202206 A JP H08202206A
- Authority
- JP
- Japan
- Prior art keywords
- drum
- elastic member
- vibration isolator
- press
- image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Accessory Devices And Overall Control Thereof (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、画像形成装置の像担持
体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image carrier of an image forming apparatus.
【0002】[0002]
【従来の技術】従来、像担持体の外周に、電子写真法に
よって画像を形成し、その画像を転写用紙に転写するよ
うにした画像形成装置がある。このような画像形成装置
に用いられる像担持体の従来の構成例を図9に示す。一
般に用いられる像担持体は、ドラム100の両端に支軸
101を中心に有するフランジ102を固定し、一方の
支軸101にモータ(図示せず)の回転を伝達するため
のギヤ103を固定的に嵌合し、内部には挿入物104
を固定的に設ける構造である。挿入物104としては、
例えばアルミニウム等の剛性の高い部材やゴム等の弾性
部材を用いることが知られている。2. Description of the Related Art Conventionally, there is an image forming apparatus which forms an image on the outer periphery of an image carrier by an electrophotographic method and transfers the image onto a transfer sheet. FIG. 9 shows a conventional configuration example of an image carrier used in such an image forming apparatus. In a commonly used image carrier, flanges 102 having a spindle 101 as a center are fixed to both ends of a drum 100, and a gear 103 for transmitting a rotation of a motor (not shown) is fixed to one of the spindles 101. The insert 104 inside
Is a structure that is fixedly provided. As the insert 104,
For example, it is known to use a highly rigid member such as aluminum or an elastic member such as rubber.
【0003】また、特開平5−35166号公報に記載
されているように、重量密度の高い重り部材を筒状の弾
性部材を介してドラム(像保持部材)の内周に保持させ
る発明がある。Further, as described in JP-A-5-35166, there is an invention in which a weight member having a high weight density is held on the inner circumference of a drum (image holding member) via a cylindrical elastic member. .
【0004】[0004]
【発明が解決しようとする課題】静電潜像を形成する前
に像担持体の表面を帯電させるために、帯電器により像
担持体に交番電界を与えると像担持体が振動して発振音
が発生する。また、接触型の帯電器の場合に、弾性部材
により形成された帯電ブレードを像担持体の表面に接触
させたり、像担持体の表面に残存するトナーを払拭する
ために、ゴム等の弾性部材で形成されたクリーニングブ
レードを像担持体に接触させると、像担持体は振動して
異音が発生する。しかも、像担持体は帯電ブレードやク
リーニングブレードの抵抗を受けるために回転ムラの原
因にもなる。When an alternating electric field is applied to the image carrier by a charger in order to charge the surface of the image carrier before forming an electrostatic latent image, the image carrier vibrates and oscillates. Occurs. In the case of a contact type charger, an elastic member such as rubber is used to bring the charging blade formed of an elastic member into contact with the surface of the image carrier or to wipe off the toner remaining on the surface of the image carrier. When the cleaning blade formed in step 1 is brought into contact with the image carrier, the image carrier vibrates and abnormal noise is generated. Moreover, the image bearing member receives the resistance of the charging blade and the cleaning blade, which causes uneven rotation.
【0005】このような問題は、図9において、挿入物
104として、重量密度が高い部材を選択した場合には
改善が見られるが、重量密度の高い部材は剛性が高いた
め、接着により固定しなければ確実に固定することは困
難である。しかし、接着による固定方法は、接着剤が硬
化するまでの時間が長く、その間に取り付け位置がずれ
たり、或いは、接着剤がドラム100の表面に付着した
不良品が発生し易い。Such a problem can be improved in FIG. 9 when a member having a high weight density is selected as the insert 104. However, since a member having a high weight density has high rigidity, it is fixed by adhesion. Without it, it is difficult to secure it securely. However, in the fixing method by adhesion, it takes a long time for the adhesive to harden, and the mounting position is displaced during that time, or a defective product in which the adhesive adheres to the surface of the drum 100 is likely to occur.
【0006】挿入物104として、ゴム等の弾性部材を
用いた場合には、その挿入物104をドラム100の内
周に圧入することが可能であるため、製作時の作業性は
向上する。しかし、弾性部材の場合は重量密度が低いた
め、前述した振動、異音を抑制することができない。When an elastic member such as rubber is used as the insert 104, the insert 104 can be press-fitted into the inner circumference of the drum 100, so that workability in manufacturing is improved. However, since the elastic member has a low weight density, it is impossible to suppress the above-mentioned vibration and abnormal noise.
【0007】特開平5−35166号公報に記載されて
いるように、重量密度の高い重り部材を筒状の弾性部材
を介してドラム(像保持部材)の内周に保持させた場合
には、振動及び異音の発生を抑制することが可能であ
る。しかし、弾性部材の中心に太い重り部材が嵌合され
ているため、弾性部材の肉厚が制限される。これによ
り、弾性部材をドラムに圧入するとしても、弾性部材の
肉厚に対する圧入時の圧縮代の割合が大きくなり、弾性
部材をドラムに圧入するときの抵抗が大きくなり、作業
性が悪くなることが予想される。As described in JP-A-5-35166, when a weight member having a high weight density is held on the inner circumference of a drum (image holding member) via a cylindrical elastic member, It is possible to suppress the generation of vibration and abnormal noise. However, since the thick weight member is fitted in the center of the elastic member, the thickness of the elastic member is limited. As a result, even if the elastic member is press-fitted into the drum, the ratio of the compression allowance at the time of press-fitting with respect to the thickness of the elastic member increases, the resistance when press-fitting the elastic member into the drum increases, and workability deteriorates. Is expected.
【0008】[0008]
【課題を解決するための手段】請求項1記載の発明は、
表面に画像を形成する画像形成面を有するドラムを設
け、外径が前記ドラムの内径よりやや大きな寸法に定め
られた屈撓自在な弾性部材にこの弾性部材の比重よりも
大きな比重を有する多数の重量部材を分散して埋設して
なる防振体を設け、この防振体を前記ドラムの内周に圧
入した画像形成装置の像担持体である。According to the first aspect of the present invention,
A drum having an image forming surface for forming an image on its surface is provided, and a flexible elastic member whose outer diameter is set to a size slightly larger than the inner diameter of the drum has a large specific gravity larger than the specific gravity of this elastic member. An image bearing member of an image forming apparatus is provided in which a vibration isolator having a weight member dispersed and embedded therein is provided, and the vibration isolator is press-fitted into the inner circumference of the drum.
【0009】請求項2記載の発明は、請求項1記載の発
明において、弾性部材の外周に突部を一体に形成した画
像形成装置の像担持体である。A second aspect of the invention is the image carrier of the image forming apparatus according to the first aspect of the invention, in which the protrusion is integrally formed on the outer periphery of the elastic member.
【0010】請求項3記載の発明は、請求項2記載の発
明において、突部をドラムの長手方向に沿うリブ状の形
状に定めた画像形成装置の像担持体である。A third aspect of the present invention is the image carrier of the image forming apparatus according to the second aspect, wherein the protrusion is formed in a rib shape along the longitudinal direction of the drum.
【0011】請求項4記載の発明は、表面に画像を形成
する画像形成面を有するドラムを設け、外周に突部が一
体に形成されるとともに外径が前記ドラムの内径よりや
や大きな寸法に定められた屈撓自在な弾性部材の中心に
この弾性部材の比重よりも大きな比重の軸状の重量部材
を有する防振体を設け、この防振体を前記ドラムの内周
に圧入した画像形成装置の像担持体である。According to a fourth aspect of the present invention, a drum having an image forming surface on which an image is formed is provided on the surface, a protrusion is integrally formed on the outer periphery, and the outer diameter is set to be slightly larger than the inner diameter of the drum. An image forming apparatus in which a vibration isolator having a shaft-shaped weight member having a specific gravity larger than the specific gravity of the elastic member is provided in the center of the flexed elastic member, and the vibration isolator is press-fitted into the inner circumference of the drum. Image carrier.
【0012】[0012]
【作用】請求項1記載の発明によれば、弾性部材を屈撓
させて防振体をドラムに圧入することができるため、接
着作業を省略することが可能となる。この場合、弾性部
材の圧入前の肉厚がドラムの内周の半径以上であるた
め、弾性部材の圧入前の半径に対する弾性部材の圧縮代
の割合を小さくすることができ、したがって、ドラムへ
の防振体の圧入抵抗を小さくすることができる。さら
に、弾性部材には比重が高い多数の重量部材が分散して
埋設されているため、防振体全体の重量を増して振動、
異音の発生及び回転ムラを抑制することが可能となる。
さらに、防振体の成形時に弾性部材中に重量部材を同時
に埋設することが可能であるため、防振体の製造行程を
短縮することが可能である。According to the first aspect of the present invention, since the elastic member can be bent and the vibration isolator can be press-fitted into the drum, the bonding work can be omitted. In this case, since the thickness of the elastic member before press-fitting is equal to or larger than the radius of the inner circumference of the drum, it is possible to reduce the ratio of the compression allowance of the elastic member to the radius of the elastic member before press-fitting. The press-fit resistance of the vibration isolator can be reduced. Further, since a large number of weight members having a high specific gravity are dispersed and embedded in the elastic member, the weight of the entire vibration isolator is increased to cause vibration,
It is possible to suppress generation of abnormal noise and uneven rotation.
Furthermore, since the weight member can be embedded in the elastic member at the same time when the vibration isolator is molded, the manufacturing process of the vibration isolator can be shortened.
【0013】請求項2記載の発明によれば、弾性部材の
外周面に突部が存在するため、防振体とドラムとの接触
面積を少なくし、ドラムへの防振体の圧入抵抗をさらに
小さくすることが可能となる。According to the second aspect of the present invention, since the elastic member has the protrusion on the outer peripheral surface, the contact area between the vibration isolator and the drum is reduced, and the press-fit resistance of the vibration isolator to the drum is further reduced. It is possible to make it smaller.
【0014】請求項3記載の発明によれば、突部がドラ
ムの長手方向に沿うリブ状の形状をしているため、防振
体の一端をドラムに圧入した後は、圧入抵抗が大きく変
化することなく防振体をドラムに容易に圧入することが
可能である。しかも、防振体の軸方向に沿う型割り構造
を採用した構造の簡単な成形金型を用いて防振体を成形
することが可能となる。According to the third aspect of the present invention, since the protrusion has a rib shape along the longitudinal direction of the drum, the press-fitting resistance largely changes after one end of the vibration isolator is press-fitted into the drum. It is possible to easily press the vibration isolator into the drum without doing so. Moreover, it becomes possible to mold the vibration isolator using a simple molding die having a structure that employs a mold splitting structure along the axial direction of the vibration isolator.
【0015】請求項4記載の発明によれば、弾性部材を
屈撓させて防振体をドラムに圧入することができるた
め、接着作業を省略することが可能となる。この場合、
弾性部材の外周面に突部が存在するため、防振体とドラ
ムとの接触面積を少なくし、ドラムへの防振体の圧入抵
抗を小さくすることが可能となる。さらに、弾性部材の
中心には比重が高い軸状の重量部材が設けられているた
め、防振体全体の重量を増して振動、異音の発生及び回
転ムラを抑制することが可能となる。According to the fourth aspect of the present invention, since the elastic member can be bent and the vibration isolator can be press-fitted into the drum, the bonding work can be omitted. in this case,
Since the protrusion is present on the outer peripheral surface of the elastic member, the contact area between the vibration isolator and the drum can be reduced, and the press-fit resistance of the vibration isolator into the drum can be reduced. Further, since the shaft-shaped weight member having a high specific gravity is provided at the center of the elastic member, it is possible to increase the weight of the entire vibration isolator and suppress the occurrence of vibration, abnormal noise, and rotation unevenness.
【0016】[0016]
【実施例】請求項1記載の発明の実施例を図1に基づい
て説明する。1は円筒形のドラムである。このドラム1
の表面には画像を形成する画像形成面(感光層)2が形
成され、両端には支軸3を有する円板状のフランジ4が
固定的に嵌合され、一方の支軸3にはモータ(図示せ
ず)に駆動されるギヤ5が固定的に嵌合されている。ま
た、ドラム1の中央部には、このドラム1の長さの略3
分の1の長さの防振体6が圧入されている。この防振体
6は、ドラム1に圧入する前の外径がドラム1の内径よ
りやや大きな寸法に定められた屈撓自在な弾性部材7
に、この弾性部材7の比重よりも大きな比重を有する鉄
やステンレス等の多数の重量部材8を分散して埋設する
ことにより形成されている。本実施例において、弾性部
材7は、耐候性、耐オゾン性、耐熱性、耐薬品性の優れ
たEPDM(エチレン・プロピレン共重合体)製の合成
ゴムにより成形した。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the invention described in claim 1 will be described with reference to FIG. Reference numeral 1 is a cylindrical drum. This drum 1
An image forming surface (photosensitive layer) 2 for forming an image is formed on the surface of the disk, a disk-shaped flange 4 having a support shaft 3 is fixedly fitted to both ends, and one support shaft 3 has a motor. A gear 5 driven by (not shown) is fixedly fitted. Further, at the center of the drum 1, the length of the drum 1 is approximately 3
The vibration isolator 6 having a length of one-half is press-fitted. This vibration isolator 6 is a flexible elastic member 7 whose outer diameter before being press-fitted into the drum 1 is set to be slightly larger than the inner diameter of the drum 1.
In addition, a large number of weight members 8 made of iron, stainless steel, or the like having a specific gravity larger than that of the elastic member 7 are dispersed and embedded. In this example, the elastic member 7 was formed of synthetic rubber made of EPDM (ethylene / propylene copolymer) having excellent weather resistance, ozone resistance, heat resistance, and chemical resistance.
【0017】このような構成において、組み立てに際し
ては、弾性部材7を屈撓させて防振体6をドラム1の内
周に圧入することができるため、防振体6をドラム1の
内周に固定するための接着作業を省略することが可能と
なる。この場合、弾性部材7の圧入前の半径がドラム1
の内周の半径以上であるため、弾性部材7の圧入前の半
径に対する弾性部材7の圧縮代の割合を小さくすること
ができ、したがって、ドラム1への防振体6の圧入抵抗
を小さくし、圧入作業を容易にすることができる。In such a structure, when assembling, the elastic member 7 can be bent to press the vibration isolator 6 into the inner periphery of the drum 1, so that the vibration isolator 6 is inserted into the inner periphery of the drum 1. It is possible to omit the bonding work for fixing. In this case, the radius before the press-fitting of the elastic member 7 is the drum 1
Since it is equal to or larger than the radius of the inner circumference of the elastic member 7, the ratio of the compression margin of the elastic member 7 to the radius before the elastic member 7 is press-fitted can be reduced, and therefore the press-fit resistance of the vibration isolator 6 to the drum 1 can be reduced. The press-fitting work can be facilitated.
【0018】また、弾性部材7には比重が高い多数の重
量部材が分散して埋設されているため、防振体6全体の
重量を増して振動、異音の発生及び回転ムラを抑制する
ことが可能となる。さらに、防振体6を成形する場合に
は、弾性部材7の成形材料中に粒子の細かい重量部材8
を混合する等の方法により、防振体6の成形時に重量部
材8を弾性部材7中に同時に埋設することが可能であ
る。したがって、防振体6の製造行程を短縮することも
可能である。Further, since a large number of weight members having a high specific gravity are dispersed and embedded in the elastic member 7, the weight of the vibration isolator 6 as a whole is increased to suppress the occurrence of vibrations, abnormal noises and uneven rotation. Is possible. Further, when molding the vibration isolator 6, the weight member 8 having fine particles in the molding material of the elastic member 7 is used.
It is possible to embed the weight member 8 in the elastic member 7 at the same time when the vibration isolator 6 is molded by a method such as mixing. Therefore, the manufacturing process of the vibration isolator 6 can be shortened.
【0019】次いで、請求項2記載の発明の各実施例を
図2ないし図4に基づいて説明する。前記実施例と同一
部分は同一符号を用い説明も省略する(以下同様)。図
2ないし図4に示す防振体6は、何れも弾性部材7の外
周に一体に形成された複数の突部9又は突部10或いは
多数の突部11を有している。Next, each embodiment of the invention described in claim 2 will be described with reference to FIGS. The same parts as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted (the same applies hereinafter). The vibration isolator 6 shown in FIGS. 2 to 4 has a plurality of protrusions 9 or 10 or a plurality of protrusions 11 integrally formed on the outer periphery of the elastic member 7.
【0020】このような構成によれば、弾性部材7の外
周面に突部9,10,11の何れかが存在するため、防
振体6とドラム1との接触面積を少なくし、ドラム1へ
の防振体6の圧入抵抗をさらに小さくすることが可能と
なる。According to this structure, since any one of the protrusions 9, 10, and 11 is present on the outer peripheral surface of the elastic member 7, the contact area between the vibration isolator 6 and the drum 1 is reduced, and the drum 1 is reduced. It is possible to further reduce the press-fitting resistance of the vibration isolator 6 into the.
【0021】特に、図2に示すように、突部9がドラム
1の長手方向に沿うリブ状の形状をし、断面形状が半円
状であるため、防振体6の一端をドラム1に圧入した後
は、圧入抵抗が大きく変化することなく防振体6をドラ
ム1に容易に圧入することが可能である。しかも、防振
体6の軸方向に沿う型割り構造を採用した構造の簡単な
成形金型を用いて防振体6を成形することが可能とな
る。これらは請求項3記載の発明に対応する効果であ
る。In particular, as shown in FIG. 2, since the protrusion 9 has a rib-like shape along the longitudinal direction of the drum 1 and has a semicircular cross section, one end of the vibration isolator 6 is attached to the drum 1. After the press-fitting, the vibration-proof body 6 can be easily press-fitted into the drum 1 without the press-fitting resistance largely changing. Moreover, it becomes possible to mold the vibration isolator 6 using a simple molding die having a structure that employs a mold splitting structure along the axial direction of the vibration isolator 6. These are the effects corresponding to the invention of claim 3.
【0022】また、図3に示すように、弾性部材7の外
周に断面形状が半円形の突部10を螺旋状に形成した場
合には、防振体6を回転させながら軸方向に押圧するこ
とにより、ドラム1に容易に圧入することが可能であ
る。なお、螺旋状の突部10は、弾性部材7の一端から
他端まで一本のように連続しているが、このような連続
する突部10を複数本平行に配列して形成してもよい。
さらに、所定長さの複数の突部を螺旋に沿って断続的に
形成してもよい。Further, as shown in FIG. 3, when the protrusion 10 having a semicircular cross section is formed in a spiral shape on the outer periphery of the elastic member 7, the vibration isolator 6 is pressed in the axial direction while being rotated. As a result, it is possible to easily press fit the drum 1. Although the spiral protrusion 10 is continuous from one end to the other end of the elastic member 7 like a single line, even if a plurality of such continuous protrusions 10 are arranged in parallel. Good.
Further, a plurality of protrusions having a predetermined length may be intermittently formed along the spiral.
【0023】次に、請求項4記載の発明の各実施例を図
5ないし図7に基づいて説明する。図5ないし図7に示
す防振体12は、屈撓自在な弾性部材13の中心にこの
弾性部材13の比重よりも大きな比重の鉄又はステンレ
ス製の軸状の重量部材14を有する。さらに、何れの防
振体12も、弾性部材13の外周に一体に形成された複
数の突部9又は突部10或いは多数の突部11を有す
る。突部9を有する防振体12は、図5に示すように前
記実施例と同様のドラム1の内周に圧接されている。図
6に示す突部10を有する防振体12も、図7に示す突
部11を有する防振体12も、状態を図示しないがドラ
ム1の内周に圧入されるものである。本実施例におい
て、弾性部材13は、耐候性、耐オゾン性、耐熱性、耐
薬品性の優れたEPDM(エチレン・プロピレン共重合
体)製の合成ゴムにより成形した。Next, each embodiment of the invention described in claim 4 will be described with reference to FIGS. The vibration isolator 12 shown in FIGS. 5 to 7 has a shaft-shaped weight member 14 made of iron or stainless steel having a specific gravity larger than the specific gravity of the elastic member 13 at the center of the elastic member 13 which is bendable. Further, any of the vibration isolator 12 has a plurality of protrusions 9 or 10 or a large number of protrusions 11 integrally formed on the outer periphery of the elastic member 13. As shown in FIG. 5, the vibration isolator 12 having the protrusion 9 is pressed against the inner circumference of the drum 1 similar to that of the above embodiment. Both the vibration isolator 12 having the protrusion 10 shown in FIG. 6 and the vibration isolator 12 having the protrusion 11 shown in FIG. 7 are press-fitted into the inner circumference of the drum 1, although the state is not shown. In this example, the elastic member 13 was molded from synthetic rubber made of EPDM (ethylene / propylene copolymer) having excellent weather resistance, ozone resistance, heat resistance, and chemical resistance.
【0024】このような構成によれば、弾性部材13を
屈撓させて防振体12をドラム1に圧入することができ
るため、防振体12をドラム1の内周に固定するための
接着作業を省略することが可能となる。この場合、弾性
部材13の外周面に突部9,10,11の何れかが存在
するため、防振体12とドラム1との接触面積を少なく
し、ドラム1への防振体12の圧入抵抗を小さくするこ
とが可能となる。この場合、突部9,10,11はそれ
ぞれ形状が異なるが、突部9,10の形状による効果は
図2及び図3に基づいて説明した前記実施例の場合と同
様である。With this structure, the vibration isolator 12 can be press-fitted into the drum 1 by bending the elastic member 13, so that the vibration isolator 12 is bonded to the inner periphery of the drum 1. The work can be omitted. In this case, since any of the protrusions 9, 10, and 11 is present on the outer peripheral surface of the elastic member 13, the contact area between the vibration isolator 12 and the drum 1 is reduced, and the vibration isolator 12 is press-fitted into the drum 1. It is possible to reduce the resistance. In this case, the protrusions 9, 10 and 11 have different shapes, but the effect of the shape of the protrusions 9 and 10 is the same as that of the above-described embodiment described with reference to FIGS. 2 and 3.
【0025】また、弾性部材13が軸状の重量部材14
の両端よりも突出する長さの場合には弾性部材13の端
部の変形が自由となるため、ドラム1に防振体12を圧
入するときに弾性部材13の端部を把持しにくくなる
が、重量部材14の長さを少なくとも弾性部材13の両
端と一致するか又はやや突出する長さに定めることによ
り、把持し易くすることができる。The elastic member 13 is a weight member 14 having a shaft shape.
When the length of the elastic member 13 is longer than both ends of the elastic member 13, the end portion of the elastic member 13 can be freely deformed, so that it becomes difficult to grip the end portion of the elastic member 13 when the vibration isolator 12 is press-fitted into the drum 1. By setting the length of the weight member 14 so as to match at least both ends of the elastic member 13 or to have a length slightly protruding, it is possible to facilitate gripping.
【0026】さらに、弾性部材13の中心には比重が高
い軸状の重量部材14が設けられているため、防振体1
2全体の重量を増して振動、異音の発生及び回転ムラを
抑制することが可能となる。Further, since the shaft-shaped weight member 14 having a high specific gravity is provided at the center of the elastic member 13, the vibration isolator 1 is provided.
2 It is possible to increase the weight of the whole 2 and to suppress the occurrence of vibration, abnormal noise and uneven rotation.
【0027】なお、軸状の重量部材14は、その外径を
弾性部材13の内径より僅かに大きな寸法に定めておく
ことにより、接着剤を用いることなく弾性部材13の中
心に圧入することができる。この場合、図8に示すよう
に、突部9(又は突部10,11)を有する防振体12
を複数に分割し、それぞれの防振体12に一本の軸状の
重量部材14を圧入するようにしてもよい。The outer diameter of the shaft-shaped weight member 14 is set to be slightly larger than the inner diameter of the elastic member 13, so that the weight member 14 can be pressed into the center of the elastic member 13 without using an adhesive. it can. In this case, as shown in FIG. 8, the vibration isolator 12 having the protrusion 9 (or the protrusions 10 and 11).
May be divided into a plurality of parts, and one shaft-shaped weight member 14 may be press-fitted into each vibration isolator 12.
【0028】[0028]
【発明の効果】請求項1記載の発明によれば、屈撓自在
な弾性部材に大きな比重を有する多数の重量部材を分散
して埋設してなる防振体をドラムに圧入する構成とした
ので、ドラム内に防振体を固定するための接着作業を省
略することが可能となる。この場合、弾性部材の圧入前
の肉厚がドラムの内周の半径以上であるため、弾性部材
の圧入前の半径に対する弾性部材の圧縮代の割合を小さ
くすることができ、したがって、ドラムへの防振体の圧
入抵抗を小さくすることができる。さらに、弾性部材に
は比重が高い多数の重量部材が分散して埋設されている
ため、防振体全体の重量を増して振動、異音の発生及び
回転ムラを抑制することができる。さらに、防振体の成
形時に弾性部材中に重量部材を同時に埋設することがで
きるため、防振体の製造行程を短縮することができる。According to the first aspect of the present invention, the vibration isolator, which is a flexible elastic member in which a large number of weight members having a large specific gravity are dispersed and embedded, is press-fitted into the drum. Therefore, it is possible to omit the bonding work for fixing the vibration isolator in the drum. In this case, since the thickness of the elastic member before press-fitting is equal to or larger than the radius of the inner circumference of the drum, it is possible to reduce the ratio of the compression allowance of the elastic member to the radius of the elastic member before press-fitting. The press-fit resistance of the vibration isolator can be reduced. Further, since a large number of weight members having a high specific gravity are dispersed and embedded in the elastic member, it is possible to increase the weight of the entire vibration isolator and suppress vibrations, abnormal noises, and uneven rotation. Further, since the weight member can be embedded in the elastic member at the same time when the vibration isolator is molded, the manufacturing process of the vibration isolator can be shortened.
【0029】請求項2記載の発明によれば、弾性部材の
外周面に突部が存在するため、防振体とドラムとの接触
面積を少なくし、ドラムへの防振体の圧入抵抗をさらに
小さくすることができる。According to the second aspect of the invention, since the elastic member has the protrusion on the outer peripheral surface, the contact area between the vibration isolator and the drum is reduced, and the press-fit resistance of the vibration isolator to the drum is further reduced. Can be made smaller.
【0030】請求項3記載の発明によれば、突部がドラ
ムの長手方向に沿うリブ状の形状をしているため、防振
体の一端をドラムに圧入した後は、圧入抵抗が大きく変
化することなく防振体をドラムに容易に圧入することが
できる。しかも、防振体の軸方向に沿う型割り構造を採
用した構造の簡単な成形金型を用いて防振体を容易に成
形することができる。According to the third aspect of the present invention, since the projection has a rib shape along the longitudinal direction of the drum, the press-fitting resistance largely changes after one end of the vibration isolator is press-fitted into the drum. The vibration-proof body can be easily press-fitted into the drum without doing so. Moreover, the vibration isolator can be easily molded by using a simple molding die having a structure that employs a mold splitting structure along the axial direction of the vibration isolator.
【0031】請求項4記載の発明によれば、外周に突部
が一体に形成された屈撓自在な弾性部材の中心に大きな
比重の軸状の重量部材を有する防振体をドラムに圧入す
る構成としたので、ドラム内に防振体を固定するための
接着作業を省略することが可能となる。この場合、弾性
部材の外周面に突部が存在するため、防振体とドラムと
の接触面積を少なくし、ドラムへの防振体の圧入抵抗を
小さくすることができる。さらに、弾性部材の中心には
比重が高い軸状の重量部材が設けられているため、防振
体全体の重量を増して振動、異音の発生及び回転ムラを
抑制することができる。According to the fourth aspect of the present invention, the vibration isolator having the shaft-shaped weight member having a large specific gravity at the center of the flexible elastic member integrally formed with the protrusion on the outer periphery is press-fitted into the drum. Since the configuration is adopted, it becomes possible to omit the bonding work for fixing the vibration isolator in the drum. In this case, since the protrusion exists on the outer peripheral surface of the elastic member, the contact area between the vibration isolator and the drum can be reduced, and the press-fit resistance of the vibration isolator into the drum can be reduced. Further, since the shaft-shaped weight member having a high specific gravity is provided at the center of the elastic member, it is possible to increase the weight of the entire vibration isolator and suppress the occurrence of vibration, abnormal noise, and rotation irregularity.
【図1】請求項1記載の発明の実施例を示すもので、
(a)は斜視図、(b)は縦断正面図、(c)は縦断側
面図である。1 shows an embodiment of the invention according to claim 1,
(A) is a perspective view, (b) is a vertical sectional front view, and (c) is a vertical sectional side view.
【図2】請求項2及び請求項3記載の発明の実施例を示
すもので、(a)は防振体の斜視図、(b)はその縦断
側面図である。2A and 2B show an embodiment of the invention described in claims 2 and 3, wherein FIG. 2A is a perspective view of a vibration isolator, and FIG. 2B is a longitudinal side view thereof.
【図3】請求項2記載の発明の実施例を示す防振体の斜
視図である。FIG. 3 is a perspective view of a vibration isolator showing an embodiment of the invention according to claim 2;
【図4】請求項2記載の発明の実施例を示す防振体の斜
視図である。FIG. 4 is a perspective view of a vibration isolator showing an embodiment of the invention according to claim 2;
【図5】請求項4記載の発明の実施例を示す斜視図であ
る。FIG. 5 is a perspective view showing an embodiment of the invention described in claim 4.
【図6】請求項4記載の発明の実施例を示す防振体の斜
視図である。FIG. 6 is a perspective view of a vibration isolator showing an embodiment of the invention according to claim 4;
【図7】請求項4記載の発明の実施例を示す防振体の斜
視図である。FIG. 7 is a perspective view of a vibration isolator showing an embodiment of the invention according to claim 4;
【図8】請求項4記載の発明の変形例を示す防振体の斜
視図である。FIG. 8 is a perspective view of a vibration isolator showing a modified example of the invention according to claim 4;
【図9】従来例を示す縦断正面図である。FIG. 9 is a vertical sectional front view showing a conventional example.
1 ドラム 2 画像形成面 6 防振体 7 弾性部材 8 重量部材 9〜11 突部 12 防振体 13 弾性部材 14 重量部材 1 Drum 2 Image Forming Surface 6 Vibration Isolator 7 Elastic Member 8 Weight Member 9-11 Projection 12 Vibration Isolator 13 Elastic Member 14 Weight Member
Claims (4)
るドラムを設け、外径が前記ドラムの内径よりやや大き
な寸法に定められた屈撓自在な弾性部材にこの弾性部材
の比重よりも大きな比重を有する多数の重量部材を分散
して埋設してなる防振体を設け、この防振体を前記ドラ
ムの内周に圧入したことを特徴とする画像形成装置の像
担持体。1. A drum having an image forming surface on which an image is formed is provided, and a flexible elastic member having an outer diameter slightly larger than an inner diameter of the drum has a specific gravity larger than that of the elastic member. An image carrier for an image forming apparatus, comprising: a vibration isolator, in which a large number of weight members having a specific gravity are dispersed and embedded, and the vibration isolator is press-fitted into the inner circumference of the drum.
ことを特徴とする請求項1記載の画像形成装置の像担持
体。2. The image carrier of the image forming apparatus according to claim 1, wherein a protrusion is integrally formed on the outer periphery of the elastic member.
形状に定めたことを特徴とする請求項2記載の画像形成
装置の像担持体。3. The image carrier of the image forming apparatus according to claim 2, wherein the protrusion is formed in a rib shape along the longitudinal direction of the drum.
るドラムを設け、外周に突部が一体に形成されるととも
に外径が前記ドラムの内径よりやや大きな寸法に定めら
れた屈撓自在な弾性部材の中心にこの弾性部材の比重よ
りも大きな比重の軸状の重量部材を有する防振体を設
け、この防振体を前記ドラムの内周に圧入したことを特
徴とする画像形成装置の像担持体。4. A drum having an image forming surface for forming an image on the surface thereof is provided, and a protrusion is integrally formed on the outer periphery, and an outer diameter is set to be slightly larger than the inner diameter of the drum and is flexible. An image forming apparatus characterized in that a vibration isolator having a shaft-shaped weight member having a specific gravity larger than that of the elastic member is provided at the center of the elastic member, and the vibration isolator is press-fitted into the inner circumference of the drum. Image carrier.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1180495A JPH08202206A (en) | 1995-01-27 | 1995-01-27 | Image carrier for image forming device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1180495A JPH08202206A (en) | 1995-01-27 | 1995-01-27 | Image carrier for image forming device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH08202206A true JPH08202206A (en) | 1996-08-09 |
Family
ID=11788044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1180495A Pending JPH08202206A (en) | 1995-01-27 | 1995-01-27 | Image carrier for image forming device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH08202206A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5881342A (en) * | 1997-03-27 | 1999-03-09 | Konica Corporation | Rotational body driving apparatus and an image forming apparatus in use therewith |
JPH11194518A (en) * | 1997-08-21 | 1999-07-21 | Ricoh Co Ltd | Electrophotographic sensitive drum |
US6757508B2 (en) * | 2001-05-23 | 2004-06-29 | Ricoh Company, Ltd. | Image carrier and damping member therefor |
US6782224B2 (en) * | 2001-05-09 | 2004-08-24 | Samsung Electronics Co., Ltd. | Image forming apparatus having structure for preventing noise and vibration of developing device |
CN104460258A (en) * | 2013-09-17 | 2015-03-25 | 富士施乐株式会社 | Contact member, image carrier, and image forming apparatus |
-
1995
- 1995-01-27 JP JP1180495A patent/JPH08202206A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5881342A (en) * | 1997-03-27 | 1999-03-09 | Konica Corporation | Rotational body driving apparatus and an image forming apparatus in use therewith |
JPH11194518A (en) * | 1997-08-21 | 1999-07-21 | Ricoh Co Ltd | Electrophotographic sensitive drum |
US6782224B2 (en) * | 2001-05-09 | 2004-08-24 | Samsung Electronics Co., Ltd. | Image forming apparatus having structure for preventing noise and vibration of developing device |
US6757508B2 (en) * | 2001-05-23 | 2004-06-29 | Ricoh Company, Ltd. | Image carrier and damping member therefor |
CN104460258A (en) * | 2013-09-17 | 2015-03-25 | 富士施乐株式会社 | Contact member, image carrier, and image forming apparatus |
US9354585B2 (en) | 2013-09-17 | 2016-05-31 | Fuji Xerox Co., Ltd. | Contact member, image carrier, and image forming apparatus |
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