JP2020023383A - Laminate of endless belt and protective sheet, method for forming the same, and laminated assembly - Google Patents

Abstract

To provide a laminate capable of enhancing reliability of protection of a protective surface of an endless belt and storing the endless belt in a cover with a smaller size than a conventional one.SOLUTION: A laminate 4 has an endless belt 1, and a first protective sheet 2 and a second protective sheet 3 which are wound around the endless belt 1 along a protected surface 1A of the endless belt 1. The first protective sheet 2 is located between the endless belt 1 and the second protective sheet 3. The first protective sheet 2 is softer than the second protective sheet 3. A friction coefficient μbetween the protected surface 1A and the first protective sheet 2 is larger than a friction coefficient μbetween the first protective sheet 2 and the second protective sheet 3.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a laminate of an endless belt and a protective sheet having a protective sheet wound along a protective surface of the endless belt, a method of forming the same, and a laminate assembly.

  In various image forming apparatuses, an endless belt may be used for image formation. Patent Literature 1 discloses an endless belt (liquid removing belt) that absorbs and removes a liquid component in an image by contacting an image on a recording medium or an image on a transfer body formed by an inkjet method. . Patent Literature 2 discloses an endless belt (intermediate transfer belt) that transfers an image formed by an inkjet method to a recording medium. Since these endless belts deteriorate over time due to wear and the like, they may need to be replaced. Since these endless belts generally have a surface that is easily damaged, it is necessary to protect the surface during storage and transport. Patent Document 3 discloses a method for protecting an intermediate transfer belt of a color laser printer. The surface of the intermediate transfer belt, which is an endless belt, is covered with a protective sheet made of a rubber elastic body or foamed sponge, and a laminate of the endless belt and the protective sheet is formed. The intermediate transfer belt is housed in a cover in the form of a laminate.

JP 2017-136838 A JP 2009-916 A JP 2001-282075 A

The protective sheet may be displaced from the protective surface of the endless belt (the surface of the endless belt requiring protection) due to deformation during packing, vibration during transfer, and the like. When the protective sheet is displaced, there is a possibility that the protective sheet may be scratched by contact or scratching on the protective surface. However, if an attempt is made to prevent the protective surface from being damaged by abrasion or the like using the configuration described in Patent Document 3, depending on the size of the belt, the belt becomes large when housed in a box or the like, and becomes practical. Is not enough.
An object of the present invention is to provide a laminated body of an endless belt and a protective sheet that can be stored in a smaller size than in the related art, in which the protection reliability of the protection surface of the endless belt is enhanced.

  The laminate of the present invention has an endless belt, and first and second protection sheets wound around the endless belt along the protection surface of the endless belt. It is located between the protective sheet. The first protection sheet is softer than the second protection sheet, and the coefficient of friction between the protection surface and the first protection sheet is larger than the coefficient of friction between the first protection sheet and the second protection sheet.

  Since the first protective sheet is softer than the second protective sheet, it follows complicated deformation of the endless belt, and hardly causes damage to the protective surface due to contact, abrasion, or the like. Further, in the present invention, the coefficient of friction between the protection surface and the first protection sheet is set to be larger than the coefficient of friction between the first protection sheet and the second protection sheet. For this reason, when a shearing force is applied to the laminate, a shift between the endless belt and the protection sheet mainly occurs between the first protection sheet and the second protection sheet. Therefore, according to the present invention, it is possible to provide a laminated body of an endless belt and a protective sheet that can be stored in a smaller size than in the related art, in which the protection reliability of the protection surface of the endless belt is enhanced.

It is a schematic diagram which shows the example of application of the endless belt which this invention targets. It is a perspective view of a layered product concerning one embodiment of the present invention. FIG. 4 is a schematic step diagram illustrating a method for packing a laminate. It is a figure showing an example of the packing box of the conventional endless belt. It is a schematic diagram which shows the relationship of the friction coefficient of an endless belt-a 1st protection sheet-a 2nd protection sheet. FIG. 4 is a schematic step diagram illustrating a method for producing a laminate in an example.

Hereinafter, an embodiment of a laminate of an endless belt and a protective sheet of the present invention will be described with reference to the drawings. FIG. 1 shows some examples of an endless belt to which the present invention is applied.
FIG. 1A shows an application example of the present invention to a liquid removal belt 101 of an inkjet printer 20. The inkjet printer 20 is an example of an image forming apparatus that forms an image on the recording paper 14 by discharging ink (an example of a liquid). The liquid removing belt 101 is a liquid removing member that removes an excess liquid component from the image formed on the intermediate transfer roller 12 in the inkjet printer 20, and is an example of the endless belt 1 according to the present invention. The recording paper 14 is transported between the intermediate transfer roller 12 and the receiving roller 13. The ink (an example of a liquid) is ejected from the recording head 11 to the intermediate transfer roller 12, and after the ink is ejected to the intermediate transfer roller 12, the ink from which an excess liquid component is removed by the endless liquid removal belt 101. Is transferred to the recording paper 14. The liquid removing belt 101 is pressed against the intermediate transfer body roller 12 by the pressing unit 21. The liquid removing belt 101 is wrapped around a plurality of rollers 22 and is provided with tension by a tension applying roller 23. The liquid removal belt 101 from which excess liquid components have been removed is washed by a cleaning module (not shown), and circulates and rotates.

  FIG. 1B shows an application example of the present invention to an intermediate transfer belt 201 of the ink jet printer 30. The ink jet printer 30 is an example of an image forming apparatus that forms an image on a recording sheet 14 (an example of a recording medium) by discharging ink (an example of a liquid). The intermediate transfer belt 201 is an intermediate transfer member that discharges ink and transfers the discharged ink to the recording paper 14 in the inkjet printer 30, and is an example of the endless belt 1 of the present invention. The recording paper 14 is transported between the transport roller 15 and the transfer pressure roller 31. The intermediate transfer belt 201 is wrapped around a plurality of rollers 22 and a transfer pressure roller 31. The ink is ejected from the recording head 11 to the intermediate transfer belt 201, and the ink ejected to the intermediate transfer belt 201 is dried by the drying heater 16 and then transferred to the recording paper 14. The ink remaining on the surface of the intermediate transfer belt 201 after the transfer is removed by the cleaning module 32 and circulates and rotates. Although not shown, another example of the endless belt to which the present invention is applied is a photosensitive belt used for electrophotography.

  Such an endless belt 1 is easily affected by aging such as abrasion, particularly when used in an industrial printer that performs a large amount of printing. Therefore, in order to maintain the predetermined performance, it is necessary to periodically replace the endless belt 1 as a consumable. Therefore, it is necessary to pack and transport the endless belt 1 separately from the printer main body. The back surface 1B (inner surface) (see FIG. 2) of the endless belt 1 is made of a strength member, a base material, and the like for securing strength to withstand a predetermined tension, and is insensitive to contact with a hard substance, abrasion, and the like. Therefore, the need for protection is low. On the other hand, the outer surface of the endless belt 1 is a surface that comes into contact with recording paper or ink, and the damage thereof leads to a defect in a printed image, so that the need for protection is high. In the following description, the outer surface of the endless belt 1 is referred to as a protection surface 1A (see FIG. 2). Generally, the protection surface 1A is easily damaged. For example, in the liquid removal belt 101 shown in FIG. 1A, the surface layer forming the protective surface 1A is formed of a soft material such as PTFE (polytetrafluoroethylene) and has a fine porous structure. For this reason, it is extremely sensitive to contact with a hard substance, abrasion, etc., and is easily damaged. Further, since the endless belt 1 is wrapped around a plurality of rollers and circulates, the sheet forming the belt needs to be thin and flexible. Therefore, if the packing and transportation of the endless belt 1 are performed alone and without applying tension, the endless belt 1 is easily bent in the width direction. The fold damages the belt surface and causes a defect in a printed image. In addition, when the endless belt 1 is attached to the printer body, it must be deformed into a complicated shape in order to wrap around the plurality of rollers, and in this case, the belt may be broken or the protection surface 1A may be damaged. There is. For this reason, in the present embodiment, as will be described in detail below, the endless belt 1 is protected by a protective sheet, and the endless belt 1 is stored, transported, and mounted in the form of a laminate of the endless belt 1 and the protective sheet.

  FIG. 2 is a perspective view of a laminated body 4 including an endless belt 1 and protective sheets 2 and 3 according to an embodiment of the present invention. In this figure, the laminate 4 is shown in a simple state in which both ends are curved at 180 degrees. The laminate 4 includes the endless belt 1 described above, and first and second protection sheets 2 and 3 wound around the endless belt 1 along the protection surface 1A of the endless belt 1. The first protection sheet 2 is located between the endless belt 1 and the second protection sheet 3. Therefore, the endless belt 1 is located on the innermost periphery of the laminate 4, the first protection sheet 2 is located outside the endless belt 1, and the second protection sheet 3 is located outside the first protection sheet 2. are doing. The back surface 1B of the endless belt 1 is not provided with a protective sheet and is exposed. The first protection sheet 2 is wound around the endless belt 1 with a degree of looseness that allows a deviation in the circumferential direction C. The second protective sheet 3 is also wound around the first protective sheet 2 with such a degree of looseness that a deviation in the circumferential direction C is allowed. Further, the second protective sheet 3 is wound looser than the first protective sheet 2 for the reason described later. In other words, the value obtained by subtracting the peripheral length of the first protective sheet 2 from the peripheral length of the second protective sheet 3 is obtained by subtracting the peripheral length of the endless belt 1 from the peripheral length of the first protective sheet 2. Has been enlarged.

  The first protective sheet 2 is formed of a soft material so as not to damage the protective surface 1A of the endless belt 1 itself. Softness can be defined, for example, by Shore hardness. The first protective sheet 2 is at least softer than the second protective sheet 3. As the first protective sheet 2, it is preferable to use a sheet formed of a soft material such as polyethylene or polyurethane. In particular, a foam cushioning material made of a foamed plastic sheet such as a polyethylene foam sheet or a polyurethane foam sheet or a polyethylene sheet and having a large number of foamed protrusions formed on the surface thereof has a high pressure dispersibility in addition to its softness, and can be suitably used. .

  The second protective sheet 3 has a greater bending rigidity in the width direction W than the bending rigidity of the first protective sheet 2 in the width direction W. Since the first protective sheet 2 is formed of a soft material, the resistance to the contact and rubbing of the protective surface 1A is greatly improved, but it may be difficult to secure high bending rigidity. For this reason, it may be difficult to prevent the endless belt 1 from bending in the width direction W using only the first protective sheet 2. That is, simply covering the endless belt 1 with the first protective sheet 2 may cause the endless belt 1 to bend easily without applying tension, and it may be difficult to prevent the protection surface 1A from being damaged due to the bending. Therefore, in the present embodiment, the second protection sheet 3 is further stacked on the outside of the first protection sheet 2. The second protective sheet 3 functions as a support that suppresses the endless belt 1 from breaking in the width direction W due to its high rigidity. Since the first protection sheet 2 protects the protection surface 1A of the endless belt 1, the second protection sheet 3 does not directly touch the protection surface 1A of the endless belt 1. Therefore, there is no problem even if a hard material is used for the second protection sheet 3, and it is easy to give the second protection sheet 3 high bending rigidity. On the other hand, the laminated body 4 may be complicatedly bent in the circumferential direction C during mounting on the printer body or packing described later. For this reason, it is preferable that the rigidity of the second protective sheet 3 in the circumferential direction C is low. Examples of the second protective sheet 3 that satisfies such characteristics include a sheet having a bellows structure or a barbed structure, and a sheet in which portions having high and low bending stiffness in the width direction W are alternately arranged in the circumferential direction C. it can. Practically, a preferred material for the second protective sheet 3 is a ruled plastic cardboard with a line that has been processed so that the bending rigidity in one direction is low, or a sheet called a wound cardboard. The second protective sheet 3 may have a single-layer structure, but may be formed of multiple layers if necessary, as long as the overall rigidity is high in the width direction W and low in the circumferential direction C. Sheets can also be used.

  Further, a binding member 5 is wound in the width direction W around a laminated body 4 including the endless belt 1, the first protection sheet 2, and the second protection sheet 3. In the present specification, the laminate 4 around which the binding member 5 is wound is referred to as a laminate assembly 8. The linking member 5 integrates the endless belt 1, the first protection sheet 2, and the second protection sheet 3 in the width direction W, and limits the mutual displacement in the width direction W. However, it is preferable that the tying member 5 is wound with such a tightness that the endless belt 1, the first protective sheet 2, and the second protective sheet 3 are not largely displaced in the width direction W. In addition, it is preferable that the binding member 5 be tightly wound so that the endless belt 1, the first protection sheet 2, and the second protection sheet 3 are completely restrained in the circumferential direction C in consideration of a packing method described later. Absent. The binding member 5 is preferably wound around the endless belt 1 and the first protective sheet 2 and tightly to allow a displacement in the circumferential direction C between the first protective sheet 2 and the second protective sheet 3. preferable. For example, when the linking member 5 lifts the laminate 4 by inserting the inner cores 6A and 6B (described later) inside the laminate 4, the second protective sheet 3 is endless at the lower portion of the laminate 4. It is preferable to wind the belt 1 with such tightness that the belt 1 does not separate greatly (do not hang down).

  The material of the binding member 5 is not particularly limited, and a general plastic film can be used. When binding, a sheet-like film can be wound around the laminate 4 in the width direction W, and both ends can be fixed with an adhesive tape or the like. The binding member 5 may be a string-shaped member, but is more preferably a film-shaped member. The use of the film-like connecting member 5 can suppress the concentration of stress on the end of the endless belt 1. The number of the link members 5 can be selected as needed. In the present embodiment, the two wide films are installed at positions where the perimeter of the laminated body 4 is approximately divided into two, but a thin binding member 5 having a width of 3 or more can also be installed.

  FIG. 3 is a schematic step diagram showing a method of packing the laminate 4. 3A to 3C, the stacked body 4 is indicated by a single line for convenience. First, as shown in FIG. 3A, the first inner core 6A and the second inner core 6B are inserted inside the endless belt 1. The first inner core 6A and the second inner core 6B are cylindrical bodies that extend in the width direction W of the stacked body 4 over the entire width of the stacked body 4. The laminate 4 is tensioned by the first and second inner cores 6A and 6B. The first inner core 6 </ b> A and the second inner core 6 </ b> B are provided at positions that divide the perimeter of the inner peripheral portion of the laminate 4 into two. Since the first inner core 6A and the second inner core 6B are in contact with the back surface 1B of the endless belt 1, the protection surface 1A is not affected. Next, as shown in FIG. 3B, one outer core 6 </ b> C is provided on the outer peripheral portion of the multilayer body 4. The outer core 6C is provided at a position facing the first inner core 6A with the laminated body 4 interposed therebetween. The outer core 6C is also a cylindrical body extending in the width direction W of the laminated body 4 over the entire width of the laminated body 4, and has the same shape and dimensions as the first and second inner cores 6A and 6B. Next, as shown in FIG. 3C, the laminate 4 is wound in a roll around the first inner core 6A and the outer core 6C while the outer core 6C is abutted against the first inner core 6A. The outer core 6C faces the outer surface of the laminated body 4, but the first protection sheet 2 and the second protection sheet 3 are interposed between the endless belt 1 and the outer core 6C. The protection surface 1A is protected. In the step shown in FIG. 3C, a displacement (relative displacement) in the circumferential direction C between the endless belt 1, the first protection sheet 2, and the second protection sheet 3 due to their thicknesses. Occurs. Since the first protection sheet 2 is flexible and stretchable, the displacement between the endless belt 1 and the first protection sheet 2 is absorbed by the deformation of the first protection sheet 2. On the other hand, the second protective sheet 3 is thicker than the endless belt 1 and the first protective sheet 2 in order to ensure bending rigidity, and has a low deformability due to its high rigidity. For this reason, it is necessary to absorb the deviation between the endless belt 1 and the second protective sheet 3 by increasing the circumference of the second protective sheet 3 to some extent in advance. In the present embodiment, as described above, when the second protection sheet 3 is wound around the outside of the first protection sheet 2, the second protection sheet 3 is not tightly attached to the first protection sheet 2, It has a slack. Finally, the laminate 4 is wound as shown in FIG. 3D, and is housed in the packing box 7 in that state.

  FIG. 4 shows a conventional method of packing the endless belt 1. FIG. 4A is a plan view of the packing box 107 in which the endless belt 1 is stored, and FIG. 4B is a cross-sectional view taken along line AA of FIG. The endless belt 1 is accommodated in the packing box 107 in a state where tension is applied by the two inner cores 6A and 6B (the state shown in FIG. 3A). The interval between the two cores 6A and 6B is substantially の of the circumference of the endless belt 1. Since the endless belt 1 is not in contact with the parts other than the cores 6A and 6B and is under tension, it is unlikely to cause abrasion or breakage. Therefore, the packing method shown in FIG. 4 is a preferable form from the viewpoint of protection of the endless belt 1. However, it is difficult for this packing method to reduce the size of the packing box 107. For example, in the case of the liquid removal belt 101 of an industrial high-speed printer, the ink absorbed from the print image needs to be collected at another place, and it is necessary to cope with large-format printing. Therefore, the width is about 80 cm and the length is about 3 m. In some cases. In that case, the plane dimensions of the packing box 107 are about 1 m in width and about 1.5 m in length. The same applies to the intermediate transfer belt 201. On the other hand, in the present embodiment, the dimension of the endless belt 1 (packing box 7) in the width direction W is the same as the example shown in FIG. 4, but the plane size of the packing box 7 is about 25 × 90 cm, and Scaled down. This is a great advantage in terms of the cost of the packaging box 7, distribution costs, storage space, and the like.

  FIG. 5A is a side view of the laminate 4, and FIG. 5B is an enlarged view of a portion A of FIG. When the laminate 4 is wound into a roll, that is, while the laminate 4 is deformed from the state of FIG. 3A to the state of FIG. 3D, the endless belt 1, the first protective sheet 2, and the second The protective sheets 3 are mutually shifted in the circumferential direction C. At this time, a shear force F is generated between the endless belt 1 and the second protection sheet 3. FIG. 5B schematically shows a shear force F between the endless belt 1 and the second protective sheet 3. This shearing force F is also generated when unwinding, that is, when deforming the laminate 4 from the state of FIG. 3D to the state of FIG. Therefore, there is a possibility that contact or rubbing may occur between the endless belt 1 and the first protective sheet 2 when performing these steps.

In the present embodiment, since the first protective sheet 2 is formed of a flexible and easily deformable material, the first protective sheet 2 easily follows the deformation of the endless belt 1. On the other hand, the second protective sheet 3 has a high rigidity and a low deformability, and therefore has low followability with the first protective sheet 2. More generally, the friction coefficient mu ₁ between the protective surface 1A and the first protective sheet 2, are greater than the friction coefficient mu ₂ between the first protective sheet 2 and the second protective sheet 3 ing. As for the friction coefficient, it is preferable to consider both the static friction coefficient and the dynamic friction coefficient. That is, the static friction coefficient and the dynamic friction coefficient between the protection surface 1A and the first protection sheet 2 are made larger than the static friction coefficient and the dynamic friction coefficient between the first protection sheet 2 and the second protection sheet 3, respectively. Is preferred. The larger the static friction coefficient is, the less the deviation is generated, and the larger the dynamic friction coefficient is, the more the deviation amount after the deviation is suppressed. Since μ ₁ > μ ₂ , as shown in FIG. 5C, the displacement in the circumferential direction C between the protection surface ₁ </ _b > A and the second protection sheet 3 caused by the shearing force F is mainly caused by the first protection. It occurs between the sheet 2 and the second protective sheet 3. In other words, the shift in the circumferential direction C between the protection surface 1A and the second protection sheet 3 caused by the shearing force F is caused by the circumferential direction C between the first protection sheet 2 and the second protection sheet 3. Is absorbed or mitigated by the displacement. The deviation in the circumferential direction C between the endless belt 1 and the first protection sheet 2 does not occur, or even if it does occur, the deviation is small, and the protection surface 1A of the endless belt 1 due to rubbing of the first protection sheet 2 or the like. The effect of is reduced. On the other hand, when μ ₁ <μ ₂ , as shown in FIG. 5D, the displacement in the circumferential direction C mainly occurs between the endless belt 1 and the first protection sheet 2, and Scratching is likely to occur on the protective surface 1A. Since the first protective sheet 2 is formed of a flexible material, the influence of the rubbing on the protective surface 1A of the endless belt 1 is small, but the rubbing still occurs as a factor that damages the protective surface 1A of the endless belt 1. Become.

  As a cause of the generation of the shear force F, vibration during transportation may be considered. Since the restraint by the linking member 5 is not so strong, a slight shift occurs between the endless belt 1 and the second protective sheet 3 when the package is exposed to vibration. However, since the displacement in the circumferential direction C occurs mainly between the first protection sheet 2 and the second protection sheet 3 by the same mechanism, the influence of the endless belt 1 on the protection surface 1A is reduced.

  Further, for example, when the endless belt 1 packed in the form shown in FIG. 4 is mounted on the printer main body, the tension applied to the endless belt 1 is lost after the endless belt 1 is taken out of the packing box 107, and the endless belt 1 is lost. The belt 1 is easily broken in the width direction. Further, the endless belt 1 needs to be wound around rollers having a complicated structure as shown in FIG. Moreover, the endless belt 1 needs to be axially mounted on the roller from the free end side of the roller in a cantilever state. Therefore, it is difficult to mount a belt whose surface is liable to be broken and easily broken by abrasion without damaging the protective surface 1A in a state where the protective surface 1A is not protected and there is no support for preventing the breakage.

  On the other hand, in the present embodiment, the endless belt 1 is mounted on the printer main body as follows. First, the laminate 4 is mounted on the roller so as to slide along the roller in the axial direction of the roller. Since the laminate 4 is restrained by the linking member 5, the endless belt 1, the first protection sheet 2, and the second protection sheet 3 do not significantly shift from each other. Therefore, the possibility that the protection surface 1A of the endless belt 1 is exposed and damaged, and the possibility that the protection surface 1A of the endless belt 1 is damaged by contact or rubbing with the first protection sheet 2 is small. Although the endless belt 1 is in a tensionless state, the possibility that the belt is broken is small because the second protective sheet 3 serves as a support. Next, the binding member 5 is removed from the stacked body 4 by, for example, cutting the front side of the binding member 5. Further, the first protection sheet 2 and the second protection sheet 3 are cut at any position in the circumferential direction C, and the first protection sheet 2 and the second protection sheet 3 are rotated while rotating the endless belt 1 at a low speed. Is gradually separated from the endless belt 1. Thus, the first protection sheet 2 and the second protection sheet 3 can be removed without applying a large load to the protection surface 1A of the endless belt 1.

(Example)
As an example of the endless belt 1, a liquid removal belt 101 for an ink jet printer was prepared. The width of the belt is 80 cm and the circumference is 2.8 m. In the liquid removal belt 101, the protection surface 1A is formed of a porous layer of polytetrafluoroethylene (PTFE) having a pore diameter of 10 μm or less, and the back surface 1B is formed of a sheet of nonwoven fabric of polyphenylsulfide (PPS) fiber. As shown in FIG. 6A, two plastic cores 6A and 6B were passed through the inside of the liquid removal belt 101, and were placed on a dedicated table and tension was applied. Next, a polyethylene (PE) foam sheet having a thickness of about 1 mm, a width of 81 cm, and a length of 3 m was prepared as the first protective sheet 2 and wound around the outer periphery of the endless belt 1 as shown in FIG. Next, as a second protective sheet 3, a plastic cardboard with a ruled line made of polypropylene (PP) having a thickness of 3 mm, a width of 82 cm and a length of 3 m is wound around the outside of the first protective sheet 2 as shown in FIG. , And the tip was taped. At this time, in consideration of later packing, the second protective sheet 3 was slightly loosened with respect to the liquid removing belt 101 and the first protective sheet 2 to form a laminate 4. Table 1 shows the coefficient of friction between the liquid removal belt 101, the first protective sheet 2, and the second protective sheet 3. It was confirmed that μ1> μ2.

  Next, as the tying member 5, a polyethylene (PE) film having a thickness of 50 μm and a width of 95 cm is composed of the liquid removing belt 101, the first protective sheet 2, and the second protective sheet 3 as shown in FIG. The laminate 4 was wound in the width direction W. The end of the tying member 5 was taped near one end of the laminate 4 so that it could be easily separated later. As shown in FIG. 6D, the linking members 5 were wound around two places of the belt-shaped laminate 4. Next, the tension of the liquid removing belt 101 was relaxed, another plastic core 6c was prepared, and the laminate 4 was wound around the cores 6c and 6b in a roll shape as shown in FIG. 3D. Next, the laminated body 4 was put in a packing box 7 made of cardboard and packed as shown in FIG. 3D, and a vibration test assuming a distribution test was performed. Thereafter, the package was unpacked, the procedure shown in FIG. 3 was reversed, the binding member 5, the second protection sheet 3, and the first protection sheet 2 were removed, and the protection surface 1A of the liquid removal belt 101 was observed. No particular damage was observed on the protective surface 1A made of the PTFE porous layer.

  Further, the liquid removing belt 101 was unpacked from the packed state, and attached to a roller system having a configuration shown in FIG. After retracting the tension applying roller 23 so that a large tension is not applied to the liquid removing belt 101, the laminated body 4 integrated by the tying member 5 was inserted from one side of the roller according to the profile of the roller system. . After the insertion, the tape on the front side of the tying member 5 was removed to open the end. The connecting member 5 could be removed to the near side by pulling one end. Subsequently, the tape on which the end of the second protective sheet 3 was stopped was peeled off, the end of the second protective sheet 3 was opened, and the roller system was slowly rotated from one side of the roller system. The second protection sheet 3 and the end of the first protection sheet 2 are pulled in accordance with the rotation, and the first and second protection sheets 2 and 3 are subjected to liquid removal while the liquid removal belt 101 is mounted on the roller system. It could be separated from the belt 101. In this manner, the liquid removing belt 101 could be mounted on the roller system without causing breakage and without damaging the protective surface 1A.

(Comparative example)
As the liquid removal belt 101, the same one as in the embodiment was used, and the same steps as in the embodiment were executed up to FIG. Next, the PE foam sheet of the example and the plastic cardboard with a ruled line made of PP were adhered with a double-sided tape. The bonded PE foam sheet and PP corrugated cardboard made of PP were wrapped around the outside of the liquid removal belt 101 so that the PE foam sheet side was in contact with the liquid removal belt 101, and the leading end was taped to form a laminate 4. Since the coefficient of friction between the PE foam sheet and the PP-corrugated plastic cardboard is very large, the relationship is μ ₁ <μ ₂ . This laminate 4 was wound around with a PE film binding member 5 in the same manner as in the example, and packed in the same manner as in the example. Further, the same vibration test as in the example was performed, and then the package was unpacked and the protective surface 1A of the liquid removal belt 101 was observed as in the example. On the protective surface 1A of the liquid removal belt 101, unevenness was generated in the surface gloss, and there were a portion that seemed to be rubbed and a portion that hardly changed. Observation with a microscope of the place where it looks like rubbing showed that the porous PTFE layer was damaged. In the comparative example, the friction coefficient has the above relationship. For this reason, most of the displacement occurring between the endless belt 1 and the second protection sheet 3 occurs between the endless belt 1 and the first protection sheet 2, and the endless belt 1 is rubbed, and the protection surface It is considered that the above-mentioned damage occurred in 1A.

DESCRIPTION OF SYMBOLS 1 Endless belt 1A Protective surface of endless belt 2 First protective sheet 3 Second protective sheet 4 Laminate

Claims (9)

  An endless belt, and a first and a second protection sheet wound around the endless belt along a protection surface of the endless belt, wherein the first protection sheet includes the endless belt and the second protection sheet. And the first protective sheet is softer than the second protective sheet, and the coefficient of friction between the protective surface and the first protective sheet is between the first protective sheet and the first protective sheet. A laminate having a larger coefficient of friction between the protective sheet and the protective sheet.   2. The laminate according to claim 1, wherein a bending rigidity in a width direction of the second protection sheet is larger than a bending rigidity in a width direction of the first protection sheet. 3.   2. The image forming apparatus according to claim 1, wherein the endless belt is a liquid removing member that removes excess liquid from an image formed on the recording medium in an image forming apparatus that forms an image on a recording medium by discharging liquid. 3. The laminate according to 2.   3. The image forming apparatus according to claim 1, wherein the endless belt is an intermediate transfer member that discharges the liquid and transfers the discharged liquid to the recording medium in an image forming apparatus that forms an image on a recording medium by discharging the liquid. The laminate according to the above.   The laminate according to any one of claims 1 to 4, wherein the first protective sheet is formed of a foamed plastic sheet or a foam cushioning material.   The laminate according to any one of claims 1 to 5, wherein the second protective sheet is made of a ruled plastic cardboard or a wound cardboard. The laminate according to any one of claims 1 to 6, and a binding member wound around the laminate in a width direction,
The linking member limits the displacement of the endless belt, the first protection sheet, and the second protection sheet in the width direction, and controls the gap between the endless belt and the first protection sheet and the first protection sheet. A laminate assembly that allows circumferential displacement between the protective sheet of (1) and the second protective sheet. A laminate according to any one of claims 1 to 6,
First and second inner cores provided at positions that divide the perimeter in the inner peripheral portion of the laminate into two and extending in the width direction of the laminate;
One outer core provided at a position on the outer peripheral portion of the laminate opposite to the first inner core with the laminate interposed therebetween, and extending in a width direction of the laminate;
A laminate assembly, wherein the laminate is wrapped around the first inner core and the outer core. First and second protection sheets are wound around the endless belt along the protection surface of the endless belt, and the first protection sheet forms a laminate sandwiched between the endless belt and the second protection sheet. Having
The first protective sheet is softer than the second protective sheet, and the coefficient of friction between the protective surface and the first protective sheet is between the first protective sheet and the second protective sheet. A method of forming a laminate of an endless belt and a protective sheet, which is larger than the coefficient of friction of the endless belt.

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