JP2001328745A - Meandering preventing guide tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a meandering preventing guide tape which solves a problem of peeling during restoration by preventing extension of a base material while reconciling a sufficient meandering preventing effect and durability and is also easy to manufacture. SOLUTION: The meandering preventing guide tape 20 is provided at least one side of an endless belt and prevents meandering. In such a meandering preventing guide tape 20, base materials 21 and 22 formed out of the same urethane material and different in hardness and at least in two layers are laminated and welded to each other. A base material layer 21 on the belt side is formed out of a urethane material having hardness according to JIS A being 90 Hs and thickness being set to approximate 0.4-1.3 mm. A bas material layer 22 on the other side is formed of a urethane material having hardness according to JIS A being 60 Hs and thickness is set to approximate 0.1-0.4 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a photosensitive device, an intermediate transfer device, a transfer separation device, a transfer device, which constitutes a copier, a laser printer or the like employing an electrophotographic system.
The present invention relates to a meandering prevention guide tape suitable for preventing meandering of an endless belt used in a charging device, a developing device, and the like.

[0002]

2. Description of the Related Art As this kind of conventional meandering prevention guide tape, there is known one as shown in FIGS.

In such a device, the intermediate transfer device 1
A photosensitive drum 2; a charger 3 for substantially uniformly charging the surface of the photosensitive drum 2; a developing device 4 for developing an electrostatic latent image corresponding to an image; 7, an electrostatic transfer device 9 for transferring the image onto an endless belt 8 supported from the inner surface.

The roller 7 and the pressing roller 10
The transferred image is printed on the recording paper 11 passing between the two.

Thus, the endless belt 8 is
For high-precision rotational driving, various conditions are required, such as that the axes of the rollers 5 to 7 are parallel, and the rollers 5 to 7 have high roundness and straightness.

If these conditions are not satisfied, the endless belt 8 will meander, and the exposure position and the transfer position will be shifted, possibly causing image unevenness and image shift.

For this reason, such an endless belt 8
For example, Japanese Patent Application Laid-Open No. 58-1001
No. 45, a method of providing a flange on a drive roll, or detecting a meandering amount and controlling the parallelism of each roll as described in JP-A-59-203036 is proposed. Have been.

In such a method of providing the flange, when the meandering amount is large, the endless belt 8 may run on the flange and break. In addition, the method of controlling the parallelism of the roll has a problem that the structure is complicated and expensive.

A guide tape for preventing meandering is adhered to the inside of the endless belt 8 so that each of the rollers 5
A method for preventing the deviation from 7 to ７7 is disclosed in JP-A-7-18743.
No. 5, JP-A-8-99706, JP-A-8-2
JP-A-25178, JP-A-11-338174,
JP-A-11-338175, JP-A-11-352
No. 832, Patent Publication 2000-29326,
It is described in JP-A-2000-75728 and the like.

For example, in the structure described in JP-A-7-187435, as shown in FIG. 6, an adhesive layer obtained by applying an adhesive to a meandering prevention guide base material 12 having a predetermined hardness. 13, a tensile modulus of elasticity of 50
A reinforcing substrate 14 having a tensile strength of 00 kg / cm ² or more is bonded to form a meandering prevention guide tape 15. Reference numeral 16 in the figure denotes an adhesive layer used for adhesion to the endless belt 8, and is attached to the adhesive surface so that the release paper 17 can be released.

In the meanwhile, the meandering-preventing guide tape 15 is provided with an adhesive on the meandering-preventing guide substrate 12 while maintaining both a sufficient meandering-preventing effect and durability. The reinforcing base material 14 is adhered through the adhesive layer 13 formed by coating, thereby preventing the meandering prevention guide base material 12 from being stretched at the time of sticking to the endless belt 8, and being restored. Separation due to shrinkage is prevented.

[0012]

However, in such a conventional meandering-preventing guide tape, the reinforcing substrate 14 is bonded to the meandering-preventing guide base 12 via an adhesive layer 16 formed of an adhesive. When forming the meandering prevention guide tape, an adhesive is separately prepared, and the meandering prevention guide base material 1 is substantially uniformly distributed.
2 or one side of the reinforcing substrate 14.

For this reason, it is difficult to say that it is easy to prepare a meandering prevention guide tape, and it is difficult to suppress an increase in manufacturing cost.

Accordingly, the present invention provides a meandering prevention guide which prevents the substrate from being stretched while resolving a sufficient meandering prevention effect and durability, eliminates problems such as peeling during restoration, and is easy to manufacture. The task is to provide tapes.

[0015]

According to the first aspect of the present invention, there is provided a meandering guide tape body provided on at least one side of an endless belt to prevent meandering. In the prevention guide tape, the meandering prevention guide tape main body is characterized by a meandering prevention guide tape formed by laminating and welding at least two layers of base materials of the same material and different in hardness.

Here, the same material is, for example, a polymer material such as urethane or a resin compound with another substance and having the same melting point.

According to the first aspect of the present invention, at least two layers of base materials having different hardnesses are welded in a laminated state. Therefore, it is not necessary to separately apply an adhesive or the like for forming an adhesive layer, so that the amount of the adhesive used can be reduced, and meandering can be easily prevented by simply pressing the base material at a predetermined temperature. Guide tape body can be created.

According to the second aspect of the present invention, the meandering prevention guide tape according to the first aspect, wherein the base material layer provided on the endless belt side has a higher hardness than the other base material layer. It is characterized by.

[0019] In the above-mentioned construction according to the second aspect, the base material layer provided on the endless belt side includes:
Compared to the other base material layer, it has a high hardness, so that the base material can be prevented from being stretched at the time of sticking to the endless belt and the contraction rate at the time of restoration can be reduced, so that peeling is prevented. You.

The high-hardness base material layer has good affinity for the adhesive interposed between the endless belt and the adhesive of the double-sided pressure-sensitive adhesive tape, and has good adhesiveness to the endless belt. Things.

According to the third aspect of the present invention,
The meandering prevention guide tape according to claim 1 or 2, wherein the surface of the substrate layer on the other side has a higher hardness than the substrate layer on the endless belt side.

According to the third aspect of the present invention, the surface of the base material layer on the other side is made higher in hardness than the base material layer on the endless belt side, so that the wear resistance is further improved. Can be improved.

[0023]

Embodiment 1 Hereinafter, a specific embodiment 1 of the present invention will be described with reference to the drawings. The same or equivalent parts as those of the conventional example will be described with the same reference numerals.

FIGS. 1 to 4 show a first embodiment of the present invention.
3 shows a meandering prevention guide tape.

First, the structure will be described. The meandering prevention guide tape 20 according to the first embodiment is attached to the inner peripheral surface 8a which is one side surface of the endless belt 8 wound around the roller 5 of a copying machine or the like. And the outer peripheral surface 5a of the roller 5
The meandering is prevented by engaging with the guide groove 5b formed in the groove.

In the meandering guide tape 20, a belt-side base material layer 21 mainly provided on the endless belt 8 side is used.
A meandering prevention guide tape main body is constituted by the belt-side base material layer 21 and the other base material layer 22 provided on the side opposite to the belt bonding surface 21a.

An adhesive layer 16 used for adhesion to the endless belt 8 is formed on the belt attaching surface 21a.
Release paper 17 is attached so that it can be released.

The meandering prevention guide tape 20 has a width of about 3
It has a long shape of about 8 mm and a length of about 800 mm, and the belt-side base layer 21 and the other base layer 22 are made of the same urethane material.

Of these, the belt-side base material layer 21
It is made of a urethane material having a hardness of 90 Hs according to ISA, and has a thickness of about 0.1 to 0.4 mm.

The base material layer 22 on the other side is made of JIS
It is made of a urethane material having a hardness of 60 Hs and has a thickness of about 0.4 to 1.3 mm.

Moreover, in the meandering prevention guide tape 20 of the first embodiment, the belt-side base layer 21 and the base layer 22 are laminated and welded by heat.

Next, the operation of the meandering prevention tape 20 according to the first embodiment will be described along the steps of manufacturing the meandering prevention guide tape.

In the first embodiment, of the meandering prevention guide tape 20, the belt bonding surface 21a of the belt-side base material layer 21 made of a relatively hard urethane material having a hardness of 90 Hs according to JISA is provided. The adhesive forming the adhesive layer 16 is applied by a coating device or the like.
The release paper 17 is attached to the adhesive layer 16.

On the upper surface of the belt-side base material layer 21, a hardness of 60 H
The base material layers 22 made of a relatively soft urethane material having a thickness of s are laminated, pressed and welded with a predetermined pressing force.

Since the belt-side base material layer 21 and the base material layer 22 are made of urethane materials having the same melting point, at least one of the base material layers 21 and 22 is melted. , 22 are in contact with the other base material layers 22, 2
1 is also melted, and the melted urethane materials are mixed with each other and adhered to each other by solidification by cooling.

The meandering prevention guide tape 20 according to the first embodiment having the above-described structure is obtained by peeling the release paper 17 and, as shown in FIG. 2, the inner peripheral surface 8a of the endless belt 8.
Paste along.

At this time, since the belt-side base material layer 21 of the meandering prevention guide tape 20 located on the endless belt 8 side is made of a relatively hard urethane material having a hardness of 90 Hs according to JIS, it is difficult to stretch. .

The high hardness belt-side base material layer 21 has relatively better affinity for the adhesive layer 16 interposed between the endless belt 8 and the low hardness base material layer 22. Adhesion with the endless belt 8 can be improved.

The base material layer 22 on the other side is made of JIS
A is made of a relatively soft urethane material having a hardness of 60 Hs, so that the roller 5
7 can be easily bent and kept in a state in which the strain stress is small even when it is stuck on the inner peripheral surface along the arc of a small radial distance along the arc.

As described above, since the belt-side base material layer 21 provided on the endless belt 8 side has a higher hardness than the other base material layer 22, the belt-side base material layer 21 is attached to the endless belt 8 when it is stuck to the endless belt 8. The extension of each of the base materials 21 and 22 is prevented, and the shrinkage rate at the time of restoration can be reduced.
Therefore, peeling of the meandering prevention guide tape 20 from the endless belt 8 is prevented.

In the first embodiment, two belt-side base layers 21 and 22 having different hardnesses are welded by heating in a stacked state.

Therefore, there is no need to separately perform a step of forming an adhesive layer between the belt-side base layer 21 and the base layer 22 by applying an adhesive or the like, as in the related art.

Therefore, it is possible to reduce the amount of the adhesive used, and to press the base material at a predetermined temperature.
The meandering prevention guide tape 20 can be easily formed.

As described above, the belt-side base material layer 21
And the base material layer 22 is laminated and welded by heat,
The height required for the guide can be obtained, and the sufficient meandering prevention effect and durability can be achieved. At the same time, the extension of the base material is prevented, eliminating problems such as peeling during restoration, and meandering that is easy to manufacture. A prevention guide tape is provided.

[0045]

[First Modification] Hereinafter, a meandering prevention guide tape 30 according to a first modification of the first embodiment of the present invention will be described with reference to FIG.

The same or equivalent parts as those in the first embodiment will be described with the same reference numerals.

FIG. 3 shows the meandering preventing guide tape 30 of the first modification.

First, the structure will be described. In the meandering guide tape 30 of the first modification, the belt-side base layer 31 provided on the endless belt side is made of a urethane material having a hardness of 60 Hs according to JISA, which is relatively low in hardness. It has a thickness of about 0.4 to 1.3 mm.

The other base material layer 32 is made of a urethane material having a hardness of 90 Hs according to JISA and has a thickness of about 0.1 to 0.4 mm, so that the belt side base on the endless belt side is formed. The surface constituted by the base material layer 32 on the other side of the material layer 31 has high hardness.

Next, the operation of the first modification will be described.

In the first modification, in addition to the operation and effect of the first embodiment, the other substrate layer constituting the surface is further compared with the belt-side substrate layer 31 provided on the endless belt side. Since 32 has high hardness, wear resistance can be improved.

[0052]

[Modification 2] Hereinafter, a meandering prevention guide tape 40 according to Modification 2 of Embodiment 1 of the present invention will be described with reference to FIG.

The same or equivalent parts as those in the first embodiment will be described with the same reference numerals.

FIG. 4 shows a meandering preventing guide tape 40 according to a second modification of the first embodiment of the present invention.

First, in the configuration, in the meandering prevention guide tape 40 of Modification 2, the belt-side base material layer 43 provided on the endless belt side is made of a urethane material having a hardness of 90 Hs according to JISA, which is relatively high in hardness. It has a thickness of about 0.1 to 0.4 mm.

The other base material layer 41 is made of a urethane material having a relatively low hardness of 90 Hs according to JISA and has a thickness of about 0.1 mm on the surface of the base material layer 41. JI with relatively high hardness of ~ 0.4mm
The front side base material layer 42 made of a urethane material having a hardness of 90 Hs by SA is covered.

The intermediate base material layer 41 has a thickness of about 0.4 to
It is provided between the belt-side base material layer 43 and the front-side base material layer 41 and has a sandwich shape.

Next, the operation of the second modification will be described.

In the second modification, in addition to the function and effect of the first embodiment, the other base material layer 42 constituting the surface is further compared with the belt-side base material layer 41 provided in the middle.
Because of high hardness, wear resistance can be improved.

Since the intermediate base material layer 41 and each of the belt-side base material layers 43 and the front-side base material layer 41 are made of the same urethane material, they are welded by heating. Thus, a three-layer sandwich meandering prevention guide tape 40 can be easily formed.

Although the first embodiment and the first and second modifications of the present invention have been described in detail with reference to the drawings, the specific structure is not limited to the first embodiment, and the specific configuration is within the scope of the present invention. Even if there is a change in the design, it is included in the present invention.

For example, in the first embodiment, the belt-side base material layer 21 is made of a urethane material having a hardness of 90 Hs according to JISA, and has a thickness of about 0.1 to 0.1.
In addition to 4 mm, the base material layer 22 on the other side is made of a urethane material having a hardness of 60 Hs and has a thickness of about 0.4 to 1.3 mm, but is not particularly limited thereto.
For example, the belt-side substrate layer 21 of the meandering prevention guide tape
If the base material layer 22 on the other side is made of the same material having a hardness of about 45 to 75 Hs, a urethane compound such as a urethane compound may be used. No matter what kind of material, such as another resin compound containing a mixture of materials, and how different in hardness, at least two layers or more are required.
Any material may be used as long as the base material of a plurality of layers is laminated and welded.

In the first embodiment, the endless belt wound around the roller 5 or the like of the copying machine is described using the meandering prevention guide tape 20.
Not only a copying machine employing such an electrophotographic method, but also a photosensitive device, an intermediate transfer device, and the like which constitute a laser printer or the like.
The shape, quantity, and application location are not particularly limited as long as the tape is a meandering prevention guide tape used for a transfer separation device, a transport device, a charging device, a developing device, and the like.

Further, in the first embodiment, the adhesive layer 16 made of an adhesive is used for the adhesion between the meandering prevention guide tape 20 and the endless belt 8. The present invention is not limited to this. For example, the adhesive layer may be formed by a double-sided pressure-sensitive adhesive tape having at least a part of an adhesive, or may be applied or attached at the time of adhesion. .

[0065]

As described above, according to the first aspect of the present invention, at least two different hardnesses are used.
The base materials of the layers are welded in a stacked state. For this reason,
Separately, it is not necessary to apply an adhesive or the like for forming an adhesive layer, and it is possible to reduce the amount of the adhesive used. Can create.

According to the second aspect of the present invention, since the base material layer provided on the endless belt side has a higher hardness than the other base material layer, the base material layer can be attached to the endless belt at the time of sticking to the endless belt. Since the extension of the base material is prevented and the shrinkage ratio upon restoration can be reduced, peeling is prevented.

Further, the high hardness base material layer has a good affinity for the adhesive material interposed between the endless belt and the adhesive material of the double-sided pressure-sensitive adhesive tape, and has good adhesiveness with the endless belt. Things.

In the third aspect,
By making the surface of the base material layer on the other side high hardness with respect to the base material layer on the endless belt side, a practically useful effect that abrasion resistance can be further improved is exhibited.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional perspective view illustrating a configuration of a meandering prevention guide tape according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional perspective view showing a roller portion of a copying machine using the meandering prevention guide tape according to the first embodiment.

FIG. 3 is a partial cross-sectional perspective view illustrating a configuration of a meandering prevention guide tape according to a first modification of the first embodiment;

FIG. 4 is a partial cross-sectional perspective view illustrating a configuration of a meandering prevention guide tape according to a second modification of the first embodiment.

FIG. 5 is a schematic view of a conventional intermediate transfer device using a meandering prevention guide tape.

FIG. 6 is a partial cross-sectional perspective view of a conventional meandering prevention guide tape.

[Explanation of symbols]

5-7 Roller 5b Guide groove 8 Endless belt 8a Inner peripheral surface (one side surface) 20, 30, 40 meandering prevention guide tape (meaning prevention guide tape main body) 21, 31, 43 belt side base material layer 22, 32, 42 ( Substrate layer on the other side)

Claims (3)

[Claims] 1. A meandering prevention tape having a meandering prevention guide tape body provided on at least one side surface of an endless belt to prevent meandering, wherein the meandering prevention guide tape body is made of at least the same material and different in hardness. A meandering prevention guide tape obtained by laminating and welding two layers of base material. 2. The meandering prevention guide tape according to claim 1, wherein the base material layer provided on the endless belt side has higher hardness than the base material layer on the other side. 3. The meandering-preventing guide tape according to claim 1, wherein the surface of the substrate layer on the other side has a higher hardness than the substrate layer on the endless belt side.