JPH0844237A - Cleaning roll - Google Patents

Abstract

PURPOSE:To sufficiently adsorb a remaining toner and to save cost and resource by spirally winding a narrow needle punch nonwoven fabric composed of a specific heat resistant fiber on the surface of a long cylindrical body. CONSTITUTION:The narrow needle punch nonwoven fabric composed of 100% heat resistant fiber is spirally wound on the long cylindrical body. That is, the narrow needle punch nonwoven fabric 2 is spirally wound on the surface of the cylindrical body 1. This is to adsorb the remaining toner on a fixing roll and the needle punch nonwoven fabric 2 is essential. The width (d) of the needle punch nonwoven fabric is preferably narrow width of 20-50mm. If the width is <20mm, the adsorption of the toner is insufficient and if the width is over 50mm, the groove 3 between the narrow needle punch nonwoven fabrics 2 is reduced and the effect to hold the adsorbed toner is decreased. The width of the groove 3 is preferably <=2mm. And the base stock of the needle punch nonwoven fabric 2 is composed of 100% heat resistant fiber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning roll used for cleaning a fixing roll of an electrophotographic apparatus or the like.

[0002]

2. Description of the Related Art Conventionally, in order to remove the toner remaining on the surface of a fixing roll of an electrophotographic copying machine, 30 to 70 is used.
It has been proposed to remove a toner by pulling out a cleaning web composed of heat-resistant fibers of 70% by weight and heat-fusible fibers of 70-30% by weight from a web roll and contacting it with the surface of a fixing roll. -3999).

This technique is suitable for high-speed electrophotographic devices and the like because the cleaning web is pulled out from one web roll and wound around the other roll, but the device must be large. It was not suitable for small electrophotographic copying machines.

Further, since the heat-resistant fibers are adhered to each other by the heat-fusible fibers, the cleaning web tends to have a hard surface, and it is difficult to sufficiently adsorb the toner.

Instead of the technique using the cleaning web, there has been proposed one in which a non-woven fabric is wrapped around a metal shaft, or one in which a foam sponge is wrapped around a metal shaft and a non-woven fabric is wrapped around it.

This type is one in which all the shafts are exchanged after being used for a predetermined period,
It was designed from the shaft each time corresponding to each copying machine manufacturer, and it was wasteful in terms of cost and resources.

[0007]

SUMMARY OF THE INVENTION The present invention provides a cleaning roll which is suitable for a small electrophotographic apparatus and the like, and which is capable of sufficiently adsorbing residual toner and saving waste in terms of cost and resources. Is an issue.

[0008]

The present invention adopts the following means in order to solve such problems. That is, the present invention is a cleaning roll characterized in that a narrow needle-punched non-woven fabric made of 100% heat-resistant fiber is spirally wound around the surface of an elongated cylinder.

The present invention will be described below in detail with reference to the drawings. FIG. 1 shows an example of the cleaning roll of the present invention. In FIG. 1, a narrow needle-punched nonwoven fabric 2 is spirally wound around the surface of an elongated cylinder 1. The tubular body 1, which is fitted to a metal shaft (not shown) or the like, is made of paper, metal, plastic, or the like. When the tubular body 1 is formed of paper, in order to prevent the silicon impregnated in the needle punched nonwoven fabric layer from being transferred to the paper and damaging the tubular body 1, for example, polyethylene is applied to the surface of the paper tubular body 1. It is preferable that a terephthalate film is wound and the narrow needle-punched nonwoven fabric 2 is spirally wound on the film.

Here, in the present invention, the narrow needle-punched nonwoven fabric 2 is spirally wound around the surface of the cylindrical body 1. This is for adsorbing the residual toner on the fixing roll, but for this reason, the needle punched nonwoven fabric 2 is essential.

The width d of the needle punched nonwoven fabric 2 is 20 to 5
A narrow width of 0 mm is preferred. If it is less than 20 mm, the adsorption of the toner is not preferable, and if it exceeds 50 mm, the number of the grooves 3 between the narrow needle-punched nonwoven fabrics is small and the effect of holding the adsorbed toner is small, which is not preferable.

The width of the groove 3 is preferably 2 mm or less, more preferably 0.5 to 2 mm. This is because the residual toner adsorbed by the needle punched nonwoven fabric 2 is further retained in this groove to prolong the life, and the limit is 2 mm or less.

The material of the needle punched nonwoven fabric 2 is 1
It is made of 00% heat resistant fiber. This is because the fixing roll has a high temperature, and unless it can withstand this high temperature, the fibers are fused and useless. Examples of this heat resistant fiber include wholly aromatic polyamide fiber, polyphenyl sulfide fiber, benzimidazole fiber, and polyimide fiber.

The unit weight of the needle punched nonwoven fabric is 60
˜1000 g / m ² , and the thickness is preferably 0.5 to 5 mm. When the basis weight is less than 60 g / m ² and the thickness is less than 0.5 mm, it becomes difficult to adsorb the toner, and the life is shortened even if it is adsorbed. On the other hand, the basis weight is 1000 g / m ²
If the thickness exceeds 5 mm, the elasticity rather conversely makes it difficult to adsorb the toner, and there is no merit in cost, which is not preferable.

The reason why the narrow needle-punched nonwoven fabric 2 is spirally wound around the cylindrical body 1 is to wind the nonwoven fabric on the surface of the roller in a uniform thickness.

The length of the fibers constituting the needle-punched nonwoven fabric is preferably 31 to 75 mm, and the thickness is 1 to 20.
d is preferred.

The needle punched nonwoven fabric 2 forms a web using, for example, the above fibers, and preferably 30 fibers / cm ²
It is obtained by needle punching with a penetration number of up to 1000 / cm ² .

[0018]

【Example】

Example 1 Nomex (registered trademark) fiber (2d × 51 mm) manufactured by DuPont, which is a wholly aromatic polyamide fiber, was used to obtain a thickness of 2
mm, was created cleaning roll wound at helix angle 30 ° on the tubular body having an outer diameter of 15mm by cutting a basis weight 550 g / m ² of needle-punched nonwoven (penetrometer number 390 present / cm ²⁾ to narrow 30 mm. This fixing roll T is shown in FIG.
The cleaning roll T was mounted on the surface of the fixing roll 4 shown in FIG. The fixing roll 4 is a fixing roll of an electrophotographic copying machine, which is a low-medium speed machine, and the life of the fixing roll 4 is observed by finding a state in which a decrease in residual toner is not seen on the surface of the fixing roll 4, and The number of copies was evaluated. In addition, 5 is a fixing roll, and 6 is a paper after copying. A conventional fixed cleaning pad was brought into contact with the fixing roll to measure its life.

As a result, the number of copies of the present invention is 20,000.
While the number of sheets was 0 to 80,000, the conventional cleaning pad was 3,000 to 10,000. Since the cleaning roll of the present invention is detached from the shaft and replaced, it has a great cost effect as compared with the conventional device wound directly around the shaft.

[0020]

The cleaning roll of the present invention can be mounted on a small electrophotographic copying machine, and is different from the conventional cleaning roll with a shaft.
Since a needle punched non-woven fabric is selected according to a wide variety of shaft sizes of copiers and wound with needle punched non-woven fabric, it is not necessary to dispose of it with the shafts like a conventional cleaning roll with shafts, so the cost can be reduced.
In addition, it is possible to smoothly dispose of it, and it has an excellent effect that the life is remarkably longer than that of the conventional fixed type cleaning pad.

[Brief description of drawings]

FIG. 1 is a perspective view of a cleaning roll of the present invention.

FIG. 2 is a side view of an apparatus in which a cleaning roll of the present invention is attached to a fixing roll.

[Explanation of symbols]

 T Cleaning Roll 1 Cylindrical Body 2 Needle Punched Nonwoven Fabric 3 Grooves 4, 5 Fixing Roll 6 Paper d Narrow Width

Claims (5)

[Claims] 1. A heat-resistant fiber 100% on the surface of an elongated cylinder.
A cleaning roll characterized in that a narrow needle punched non-woven fabric made of is spirally wound. 2. The cleaning roll according to claim 1, wherein the groove width between the stuck needle punched nonwoven fabrics is 0.5 to 2 mm. 3. The basis weight of the needle punched nonwoven fabric is 60 to 1.
The cleaning roll according to claim 1 or 2, which has a weight of 000 g / m ² and a thickness of 0.5 to 5 mm. 4. The cleaning roll according to claim 1, wherein the cylindrical body is made of paper. 5. The cleaning roll according to claim 4, wherein a thin needle-punched nonwoven fabric is spirally wound around the surface of the cylindrical body with a film layer interposed therebetween.