JPS58187973A - Cleaning device of fixation roll - Google Patents

Abstract

PURPOSE:To easily execute a replacing work of a cleaning member in a short time, by providing plural cleaning members which are multi-layered so as to contact successively to a fixation roll, and are separated and drawn out freely. CONSTITUTION:Cleaning members 14, 15 and 16 are piled up and contained in a cover bracket 13 of a channel shape, which is provided so as to be opposed to a fixation roll 4, and are pressed against the roll 4. Each member 14-16 has cleaning felt 14a-16a, respectively, and heat resistant ''Mylar'' 14b-16b is fixed. When contamination of the felt 14a advances, the member 15 of the upper stage is made to press-contact to the roll 4 by a spring 22 by inserting a finger from a draw-out hole 23 and drawing out the member 14 to the outside. Therefore, a replacing work of the cleaning member can be executed easily in an extremely short time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixing roller IJ-keeping device for a copying machine or the like.

Generally, a cleaning device is provided to clean the fixing roller from dirt, but a cleaning pad made of felt or the like that does not damage the fixing roller is often used as the cleaning member.

For example, as shown in Figure 1, the fixing roller (4), which is paired with the pressure roller (1) and heats and fixes the toner* (3) on the recording paper (2), is placed on the support frame (5). In some cases, the attached cleaning pad (6) is brought into contact with the cleaning pad (6) and is held down by a presser plate (8) pulled by a spring (7).

(9) is an oil application roller. In this case, the cleaning pad (6) has a limit to its cleaning ability, and if it becomes heavily soiled, it will cause cleaning failure and cause copy stains such as offset, so it should be replaced during periodic inspections. It is replaced with a new one at every regular inspection. However, this replacement work is troublesome and time-consuming, and must be performed by a service person, making it difficult for the user to deal with problems such as offset immediately.The present invention was developed in view of these points. It is an object of the present invention to provide a fixing roller cleaning device that allows a cleaning member to be replaced easily in a short period of time, and that allows trouble to be dealt with immediately when it occurs.

In the present invention, by providing a plurality of cleaning members that are laminated in multiple layers so as to sequentially contact the fixing roller and can be pulled out separately, the cleaning members other than the cleaning member currently in use can be used as spares, and the cleaning members in use can be used as spare cleaning members. The structure is such that the cleaning member can be replaced with a new one by pulling it out.

An embodiment of the present invention will be described based on FIGS. 2 and 3. Here, the basic structure of the fixing device is indicated by the same reference numerals as in FIG. In addition, CIO is an entrance guide plate,
0]) is an exit guide plate, and Da is a peeling claw. and,
A cleaning device is provided between the peeling claw (6) and the oil application roller (9).

First, a cover bracket formed in a substantially U-shape is provided to face the fixing roller (4). Inside this cover bracket αj is a cleaning member α◆α9α.
The cleaning members Q are stacked and housed, and the cleaning members negative ♦ are arranged so as to be in contact with the fixing roller (4).

Here, each cleaning member α4 Q! (lfl) is a cleaning felt (14a) on the fixing roller (4) side.
(15a) (16eL), and heat-resistant mylar (144) (1μ) (166) is fixed to the upper surface of the heat-resistant mylar (14!l') (1μ) (lsl=). Drawer pieces (14C) (15G) (holes (14d) (15d) (16d) extended as 16 holes for hooking fingers
is formed. Further, a presser plate αη is provided on the cleaning member aQ.

This presser plate αη is welded and fixed to the support plate Q center which is vertically movably attached to the stay α frame through step screws (to) and elongated holes. In addition, the cover bracket (to) of the presser plate α
In between, the cleaning member CI4 is inserted through this presser plate αη.
A compression spring 4 is provided that presses 09α0 toward the fixing roller (4). Furthermore, this cleaning member C is attached to the constant 1 side plate on the drawer piece (14Z) side of the cleaning member α
It has a size that allows the I4 to be pulled out, and a pull-out hole is formed into which a finger can be inserted, and is usually covered with a cover or the like.

In such a configuration, the cleaning member α◆ is compressed via the cleaning member αe M and the presser plate αη.
The fixing roller (4) is pressed against the fixing roller (4) by the cleaning felt (14a), and the surface of the fixing roller (4) is cleaned by the cleaning felt (14a). However, during periodic inspections when the cleaning felt (14a) has become dirty, insert your finger through the pull-out hole and hook it into the hole to remove the heat-resistant mylar (14n) and, therefore, the cleaning member (14). Pull it outward.This removes the spare cleaning member (2) that was located above the cleaning member α◆ and was not performing cleaning
) is applied to the fixing roller (4) under the pressing force of the compression spring (c).
), and the replacement work is completed. Therefore, the cleaning member replacement work by a service person can be carried out in a short time by simply pulling out the old cleaning member, and downtime for the user can be shortened. Furthermore, since it can be easily replaced in this way, it can be replaced by the user with guidance, and even if troubles such as offset occur outside of periodic inspections, they can be dealt with immediately. Furthermore, in the drawer of the cleaning member α→(the same applies to the cleaning member (g) α6),
Since the part in contact with Ningfel (15a) is made of heat-resistant mylar (14&) with a small coefficient of friction, the drawing is smooth.

In addition, in this example, the cleaning member α4α5 (10) is shown as being laminated in three layers, but it is of course possible to have more layers. An elastic member such as rubber may also be used.

As described above, the present invention is provided with a plurality of cleaning members that are laminated in multiple layers so as to sequentially contact the fixing roller and can be pulled out separately, so that cleaning members other than those currently in use can be used as spares, such as during periodic inspections, etc. It is possible to replace the cleaning member in use with a new one by simply pulling it out, which saves time, allows the user to perform the replacement work, and also allows for immediate response when troubles such as offset occur. It is.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a conventional example, FIG. 2 is a side view showing an embodiment of the present invention, and FIG. 3 is a perspective view of the main parts thereof. 2... Recording paper (toner support), 3... Toner image,
4... Fixing roller, 14 to 16... Cleaning department Applicant: Ricoh Tumori Co., Ltd. 6 Figure 1, page 1 continued 0 Inventor: Masatoshi Moriyama Stock, 1-3-6 Nakamagome, Ota-ku, Tokyo Within the company Ricoh

Claims (1)

[Claims] A fixing roller cleaning device comprising a plurality of cleaning members that are laminated in multiple layers so as to be in sequential contact with a fixing roller that heats and fixes a toner image on a toner support and can be freely separated and pulled out.