JP2018146707A5

JP2018146707A5 -

Info

Publication number: JP2018146707A5
Application number: JP2017040278A
Authority: JP
Filing date: 2017-03-03
Publication date: 2020-02-13
Anticipated expiration: 2037-03-03

Description

前記課題を解決するため、本発明の定着装置は、軸線方向に一対で配設された保持部によって両端部が周回可能に摺接保持された定着スリーブと、前記定着スリーブを加熱する加熱源と、前記一対の保持部の間において前記定着スリーブの内周面に当接したベース部材と、前記定着スリーブと対向して配置され、前記定着スリーブと当接した状態で前記ベース部材との間でニップ部を形成すると共に、当該当接状態で回転駆動することで前記定着スリーブを従動回転する加圧部材と、前記定着スリーブの両端部に配設されたラビリンス構造を有するシール部と、を有することを特徴とする。 In order to solve the above-mentioned problem, a fixing device of the present invention includes a fixing sleeve in which both ends are slidably held by a pair of holding units disposed in the axial direction so as to be able to rotate, and a heating source that heats the fixing sleeve. A base member abutting on the inner peripheral surface of the fixing sleeve between the pair of holding portions, and a base member disposed opposite to the fixing sleeve and in contact with the fixing sleeve; A pressure member that forms a nip portion and is driven to rotate the fixing sleeve by being rotationally driven in the contact state; and a seal portion having a labyrinth structure disposed at both ends of the fixing sleeve. it shall be the features a.

定着スリーブ２１の温度は、温度検知手段としてのサーモパイル２７によって、また加圧ローラ２２の温度は、温度検知手段としてのサーミスタ２９によって、それぞれ検知されるようになっている。その他、定着スリーブ２１から用紙を分離する分離部材２８と、加圧ローラ２２を定着スリーブ２１へ加圧する加圧手段等が設けられている。 The temperature of the fixing sleeve 21, the thermopile 27 as temperature detecting means and the temperature of the pressure roller 22, the thermistor 29 as a temperature detecting means, is adapted to be detected, respectively. In addition, a separating member 28 for separating the sheet from the fixing sleeve 21, a pressing unit for pressing the pressing roller 22 to the fixing sleeve 21, and the like are provided.

このため、定着スリーブ２１とニップ形成部材８０の摺動部分におけるスティック・スリップ現象で異音が発生すると、当該異音が前記隙間６５から外部に漏れて騒音になっていた。また定着スリーブ２１の内部の高温が前記隙間６５から外部に逃げることでハロゲンヒータ７０の消費電力に無駄が発生していた。 For this reason, when an abnormal noise is generated due to a stick-slip phenomenon in a sliding portion between the fixing sleeve 21 and the nip forming member 80, the abnormal noise leaks to the outside from the gap 65 and becomes noise. Further, since the high temperature inside the fixing sleeve 21 escapes from the gap 65 to the outside, the power consumption of the halogen heater 70 is wasted.

Claims

A fixing sleeve in which both end portions are slidably held by a pair of holding portions arranged in the axial direction so as to be able to rotate,
A heating source for heating the fixing sleeve,
A base member contacting an inner peripheral surface of the fixing sleeve between the pair of holding portions;
The fixing sleeve is disposed to face the fixing sleeve, and forms a nip portion between the fixing sleeve and the base member in a state where the fixing sleeve is in contact with the fixing sleeve. A pressure member ,
A seal portion having a labyrinth structure disposed at both ends of the fixing sleeve,
A fixing device comprising:

The fixing device according to claim 1, wherein the seal portion is disposed between the holding portion and both ends of the fixing sleeve.

2. The fixing device according to claim 1, wherein the seal portion is provided at both ends of a heater serving as a heating source provided in the fixing sleeve in an axial direction. 3.

4. The fixing device according to claim 1, wherein a low friction material is disposed on a pressing surface of the base member that contacts an inner peripheral surface of the fixing sleeve. 5.

5. The fixing device according to claim 4, wherein the low friction material is a fluororesin fiber.

The fixing device according to claim 4, wherein the low friction material is a ceramic or fluorine coating material.

The fixing device according to any one of claims 1 to 6, wherein a lubricant is applied to the base member.

The fixing device according to claim 7, wherein the lubricant is silicone oil or fluorine grease.

An image forming apparatus equipped with the fixing device according to claim 1.