JP2012181299A - Cleaning roller and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning roller in which an elastic foamed body spirally wound on an outer circumference of a shaft is hardly peeled off an end of the spiral direction, and the strength at the end is high, and which excellently scrapes fine particles from a surface of a charging roller.SOLUTION: A manufacturing method of the cleaning roller comprises steps of: winging the belt like elastic foamed body 21 on the outer circumference of the shaft 11; fixing the belt like elastic foamed body 21 on the outer circumference of the shaft 11 by using a single-sided adhesive tape provided on one side of the belt like elastic foamed body 21; and heat-pressing the end in the spiral direction of the belt like elastic foamed body 21 spirally wound on the shaft 11 to compress the end to fix it in the compressed shape so that the end is thinner than the other part and has a higher apparent density.

Description

  The present invention relates to a cleaning roller, and more particularly to a cleaning roller for removing fine particles such as residual toner and paper dust attached to a charging roller in OA equipment such as a copying machine, a printer device, and a facsimile device.

  For example, in OA equipment such as a copying apparatus, an image recording apparatus, a printer apparatus, and a facsimile apparatus, a cleaning roller is used for a charging system in an electrophotographic system. FIG. 9 is a diagram schematically showing the structure of the electrophotographic system. Reference numeral 81 is a photosensitive drum, 83 is a charging roller, 85 is a cleaning roller, 87 is a laser transmitter, 89 is a toner supply device, 91 is a blade, 93 is a transfer belt, and P is paper. The cleaning roller 85 is provided to remove fine particles such as residual toner and paper dust attached to the surface of the charging roller 83, and includes a shaft 85a and an elastic foam layer 85b provided on the outer periphery of the shaft 85a. The elastic foam layer 85b rotates while being pressed against the surface of the charging roller 83, and the fine particles on the surface of the charging roller 83 are removed by the elastic foam layer 85b. The cleaning roller 85 does not have a driving unit for rotation, and the cleaning roller is driven according to the driving rotation of the charging roller.

As the cleaning roller, there is a type in which the elastic foam is formed into a cylindrical shape by inserting a shaft through the center of the elastic foam processed into a square pillar shape and polishing the outer periphery of the elastic foam.
However, in the cleaning roller formed by polishing, the polishing powder generated at the time of polishing enters fine irregularities on the surface of the elastic foam, which may adversely affect the use.

In order to solve the problem of the abrasive powder, there has been proposed a cleaning roller in which a cleaning member made of a string-like urethane sponge is spirally wound around the outer periphery of a shaft (Patent Document 1).
However, the cleaning roller in which a string-like cleaning member is wound spirally around the outer periphery of the shaft has a problem that the cleaning performance is inferior because the contact between the charging roller and the cleaning member becomes a line contact and the contact area is small.

Also, there is a cleaning roller in which a band made of elastic foam is spirally wound around the peripheral surface of the shaft, and the thickness of one end in the direction in which the spiral advances is made thinner toward the tip so that the one end does not contact the charging roller. It has been proposed (Patent Document 2).
The cleaning roller in which one end of the elastic foam in the direction in which the spiral advances does not come into contact with the charging roller can eliminate the possibility that one end of the elastic foam in the direction in which the spiral advances contacts the surface of the charging roller and is peeled off. . However, one end of the elastic foam in the direction in which the spiral advances may cause other parts provided in the OA device to come into contact with the mechanism or the like, and the elastic foam is a non-foamed material because it has a cell structure. Since the strength is lower than that of the object, one end in the direction in which the spiral advances may come into contact with other parts or the like, and may be peeled off or torn.

  Also, in the cleaning roller in which one end of the elastic foam in the spiral direction is not in contact with the charging roller, the elastic foam is grounded to the shaft or the fixing layer in the resin skeleton portion, so that the grounding area is substantially small and bonded. Power is low. Therefore, in order to reduce the stress applied to the tip portion due to friction with the charging roller, it is necessary to set the thickness thin over a wide range of the tip portion of the elastic foam. That is, it is necessary to increase the area of the portion that is bonded to the shaft side and does not contact the charging roller. As a result, the cleaning performance at the end of the elastic foam becomes inferior, so that it is necessary to extend the shaft in order to prevent the cleaning performance from being lowered, and there is a problem that the cleaning roller is enlarged.

JP 2008-070532 A JP 2010-286713 A

  The present invention has been made in view of the above points, and the elastic foam wound spirally around the outer periphery of the shaft is difficult to peel off at the end portion in the spiral direction, and the end portion has high strength and good cleaning performance. An object of the present invention is to provide a simple cleaning roller and a manufacturing method thereof.

  The invention according to claim 1 is a cleaning roller in which a belt-like elastic foam is spirally wound around the outer periphery of the shaft and fixed to the outer surface of the shaft by adhesion or adhesion, and is wound spirally around the outer periphery of the shaft The band-shaped elastic foam thus obtained is characterized in that the end portion in the spiral direction has an apparent density larger than that of the other portion and is thinner.

  The invention according to claim 2 is the invention according to claim 1, wherein the band-shaped elastic foam is fixed to the outer surface of the shaft via a fixing layer in which an adhesive or an adhesive is attached to both surfaces of a base material. The adhesive is fixed in an impregnated state in which the adhesive enters the band-like elastic foam.

  According to a third aspect of the present invention, there is provided a cleaning roller manufacturing method in which a belt-like elastic foam is spirally wound around an outer periphery of a shaft and fixed to the outer surface of the shaft by adhesion or adhesion. An adhesive or adhesive fixing layer is provided on the belt, and the belt-shaped elastic foam is spirally wound around the shaft so that the fixing layer is on the shaft side, and the spiral direction of the belt-shaped elastic foam is These ends are pressed against the outer surface of the shaft by hot pressing to compress and fix to the compressed shape.

  According to a fourth aspect of the present invention, in the third aspect, the strip-shaped elastic foam is cut from the surface, leaving at least a part on the end side in the spiral direction, and the tip end side in the spiral direction from the cut portion. The band-shaped elastic foam is hot-pressed.

  According to the cleaning roller of the first aspect of the present invention, the belt-like elastic foam wound around the outer periphery of the shaft spirally has a higher strength because the end portion in the spiral direction has a higher apparent density than the other portions. It is difficult to peel off and torn. In addition, the band-shaped elastic foam wound spirally around the outer periphery of the shaft is thinner than the other ends in the spiral direction, so the spiral end is in contact with the surface of the charging roller when the cleaning roller is used. Without being peeled off, it is possible to suppress peeling due to rubbing with the charging roller. In addition, the band-shaped elastic foam has an increased apparent density at the thin portion at the end in the spiral direction, which increases the ground contact area between the shaft and the fixing layer and improves the fixing force. Can be reduced. Therefore, at the end of the elastic foam, the area of the thin portion that does not contact the charging roller can be reduced to increase the area that contacts the charging roller, and the cleaning performance (particulate particles) can be increased without extending the shaft. Since the scraping performance) can be ensured, the cleaning roller can be reduced in size.

  According to the invention of claim 2, since the adhesive or adhesive of the fixing layer is fixed in the impregnated state in which the band-shaped elastic foam has entered, the fixing strength between the band-shaped elastic foam and the shaft increases. The end of the band-shaped elastic foam is more difficult to peel off from the shaft.

  According to invention of Claim 3, the edge part of the spiral direction of the strip | belt-shaped elastic foam wound helically around the outer periphery of the shaft is pressed against the outer surface of the shaft by hot pressing, and is compressed and fixed to the compressed shape. Thereby, the apparent density of the edge part of the spiral direction of an elastic foam can be made high, and also thickness can be made thin. Therefore, in the manufactured cleaning roller, the strength of the heat-pressed portion at the end of the belt-like elastic foam in the spiral direction is high, and the end of the elastic foam in the spiral direction is on the surface of the charging roller. It is possible to prevent the end portion from being peeled off or torn. In addition, the band-shaped elastic foam has an increased apparent density at the thin portion at the end in the spiral direction, which increases the ground contact area between the shaft and the fixing layer and improves the fixing force. Can be reduced. Therefore, it is only necessary to press a part at the end of the elastic foam, and it is possible to increase the area that contacts the charging roller by reducing the area of the thin portion that does not contact the charging roller, and to extend the shaft. Since the cleaning performance can be ensured without it, the cleaning roller can be miniaturized.

  According to the invention of claim 3, after the belt-like elastic foam is fixed to the outer surface of the shaft by the fixing layer having the pressure-sensitive adhesive or the adhesive, it is hot-pressed at a temperature equal to or higher than the melting temperature of the pressure-sensitive adhesive or the adhesive. The adhesive or adhesive melted in the fixing layer also enters the elastic foam and the gap between the elastic foam and the shaft, thereby increasing the substantial ground contact area with the shaft at the end of the belt-shaped elastic foam. This can further improve the adhesive force with the shaft.

  According to the invention of claim 4, since the band-like elastic foam is hot-pressed on the tip side in the spiral direction with respect to the cut portion, the influence of the compression deformation of the elastic foam by the hot press is applied from the cut portion to the tip. It can be limited to the part on the side, the surface of the elastic foam can be pulled to the part that is not hot-pressed, and the ridgeline (edge) of the elastic foam can be prevented from being rounded. Good fine particle scraping property can be obtained due to the sharp shape of the ridgeline.

It is a perspective view of the cleaning roller concerning one embodiment of the present invention. It is an expansion perspective view of the spiral direction edge part of the strip | belt-shaped elastic foam in FIG. It is an enlarged front view of the spiral direction edge part of the strip | belt-shaped elastic foam in FIG. It is an enlarged front view which shows the hot press part of the spiral direction edge part which concerns on other embodiment. It is a top view of the belt-shaped elastic foam before winding around a shaft and a shaft. It is a K arrow line view of FIG. It is sectional drawing which shows the time of hot press. It is a figure which shows the peeling distance in the peeling test by standing. It is a figure which shows the structure of an electrophotographic system typically.

  The cleaning roller 10 shown in FIG. 1 is mounted so as to rotate, for example, in contact with the surface of the charging roller 83 shown in FIG. 9, and removes particles such as toner adhering to the surface of the charging roller 83. Is preferred. The cleaning roller 10 includes a shaft 11 and a belt-like elastic foam 21 that is spirally wound around the outer periphery of the shaft 11 and fixed to the outer peripheral surface of the shaft 11 by adhesion or adhesion.

  As shown in FIG. 5, the shaft 11 is composed of a rod-shaped body made of metal or the like, and constitutes a core material of the cleaning roller 10. The shaft 11 has a length and a diameter corresponding to a device to which the cleaning roller 10 is attached. For example, the length a is 226 to 350 mm, and the diameter φ is 3 to 8 mm. L is the center line of the shaft 11.

  As shown in FIG. 2, the band-shaped elastic foam 21 is provided with a fixing layer 27 having adhesiveness or adhesiveness on one surface on the shaft 11 side, and is fixed to the outer surface of the shaft 11 by the fixing layer 27. Has been. The fixing layer 27 is preferably a double-sided adhesive tape in which a pressure-sensitive adhesive or an adhesive is attached to both surfaces of a substrate. FIG. 5 shows a plan view of a belt-like elastic foam 21A before being wound around the shaft 11. FIG. FIG. 6 is a view taken in the direction of arrow K in FIG. The band-shaped elastic foam 21 (21A) has an appropriate width and height. For example, as shown in FIG. 5, the width c of the band-shaped elastic foam 21A before being wound around the shaft 11 is 3 0.0 to 13.0 mm, and as shown in FIG. 6, a case where the thickness h of the belt-like elastic foam 21 </ b> A before being wound around the shaft 11 is 2.0 to 4.0 mm is given. The width c of the band-shaped elastic foam 21A before being wound around the shaft 11 is a width dimension orthogonal to the longitudinal direction Y of the band-shaped elastic foam 21A.

As the elastic foam constituting the band-shaped elastic foam 21 (21A), foams such as open-cell polyurethane foam and open-cell polyolefin are preferable, and polyurethane foam is particularly preferable. In the case of polyurethane foam, apparent density (JIS K7222) 24-80 kg / m ³ , hardness (JIS K6400-2, 25% compression hardness) 100-410 N, tensile strength (JIS K6400-5) 69-300 kPa, elongation ( JIS K6400-5) 100 to 220% is preferable.
Cleanability is reduced without being completely scraped off deposits of the charging roller surface in the case the apparent density of the elastic foam is less than 24 kg / m ^3, whereas, if it exceeds 80 kg / m ³ is in close contact with the charging roller The load becomes large to follow.
When the hardness of the elastic foam is less than 100N, the stress applied to the charging roller is reduced, and the scraping performance and the cleaning performance are deteriorated. On the other hand, when the hardness exceeds 410N, the stress applied to the charging roller is too high. In addition, the load on the driving device is increased to rotate the cleaning roller.
When the tensile strength (JIS K6400-5) of the elastic foam is less than 69 kPa, the surface of the elastic foam is torn or scraped.
The elongation of the elastic foam (JIS K6400-5) is set in a predetermined range so that the charging roll and the cleaning roll are in surface contact. Further, the unwinding force after the elastic foam is wound around the shaft is alleviated by the elongation.

  Further, when the belt-like elastic foam 21 </ b> A is spirally wound around the outer periphery of the shaft 11, both end surfaces 28, 28 in the length direction Y are arranged in directions perpendicular to the shaft 11. The surfaces 28 and 28 are cut obliquely with respect to the length direction Y, and both ends 22 and 22 are substantially V-shaped. A band-shaped elastic foam 21 wound spirally around the outer periphery of the shaft 11 is compressed at the end portions (both end portions in the illustrated example) 25 in the spiral direction M by hot pressing, and is fixed in the compressed and compressed shape. Yes. The portion 26 hot-pressed in the belt-like elastic foam 21 is fixed in a compressed shape, so that it becomes thinner than the other portions, has an apparent density, and increases in strength. Further, in the heat-pressed portion 26, the adhesive or adhesive of the fixing layer 27 is fixed in an impregnated state where the adhesive enters the band-shaped elastic foam, whereby the bonding strength between the band-shaped elastic foam and the shaft is increased. As a result, the end of the belt-like elastic foam is more difficult to peel off from the shaft.

  The apparent density increasing portion at the end portion 25 in the spiral direction M in the belt-like elastic foam 21, that is, the hot-pressed portion 26 is not limited to the triangular shape in plan view shown in FIGS. 1 to 3, and is shown in FIG. 4. It may be circular or other shapes (not shown) like the press portion 30 of the end portion 29.

  Next, an embodiment of a method for manufacturing the cleaning roller 10 will be described. First, as shown in FIG. 5, the strip-shaped elastic foam 21A having a predetermined width c is formed on the outer peripheral surface of the shaft 11 having a predetermined length a and a diameter φ, leaving a predetermined range b at both ends of the shaft 11. The coil 11 is spirally wound around the center line L of the shaft 11 at a predetermined angle θ, for example, 20 to 50 degrees, and fixed to the outer surface of the shaft 11. The belt-like elastic foam 21A is as described in the cleaning roller 11, and will be briefly described here. The band-like elastic foam 21A is preferably a foam such as open-cell polyurethane foam or open-cell polyolefin, and polyurethane foam is particularly suitable. As shown in FIG. 6, the belt-like elastic foam 21 </ b> A is provided with a fixing layer 27 having adhesiveness or tackiness on one surface on the shaft 11 side, and the fixing layer 27 causes the above-described outer surface of the shaft 11. The band-shaped elastic foam 21A is fixed. As the fixing layer 27, a double-sided adhesive tape is suitable.

  Further, when the belt-like elastic foam 21A before being wound around the shaft 11 is spirally wound around the outer periphery of the shaft 11, both end faces 28, 28 are in a direction perpendicular to the shaft 11. Both end faces 28, 28 are cut obliquely with respect to the longitudinal direction Y of the band-like elastic foam 21A in advance, and both ends 22, 22 are substantially V-shaped.

  Next, as shown in (7A) and (7B) of FIG. 7, the end 25 of the belt-like elastic foam 21 wound spirally around the outer periphery of the shaft 11 is heated with a metal piece 31 of the shaft 11. Press against the outside and heat press. The hot pressing temperature is preferably a temperature at which the band-shaped elastic foam 21 is plastically deformed and the adhesive or pressure-sensitive adhesive of the fixing layer 27 can be melted, for example, 165 to 280 ° C. The surface 32 that presses the band-shaped elastic foam 21 in the metal piece 31 is not limited to a size that allows the entire surface of the end 25 of the elastic foam to be hot-pressed, but a part of the end 25 on the tip 22 side. The shape may be a hot-pressed shape, for example, a circle or a square.

  The portion compressed by hot pressing at the end portion 25 of the band-shaped elastic foam 21 is impregnated into the elastic foam by the plastic deformation of the elastic foam and the adhesive or adhesive of the fixing layer 27 being melted. By fixing, the elastic foam 21 is fixed in a compressed shape, the thickness of the elastic foam 21 is thinner than that of the other part, the apparent density of the elastic foam 21 is increased, the strength is increased, and the shaft 11 is in close contact and is hardly peeled off. Further, the melted pressure-sensitive adhesive or adhesive enters the elastic foam 21 and also into the gap between the elastic foam 21 and the shaft 11, so that the end portion 25 of the band-shaped elastic foam 21 is in contact with the shaft 11. The substantial ground contact area is increased, and the adhesive force with the shaft 11 is further improved.

  When the cleaning roller 10 manufactured as described above is attached to an OA device together with the charging roller and used, the thickness of the elastic foam is reduced at the end in the spiral direction. The end portion of the roller does not come into contact with the surface of the charging roller and is difficult to peel off. Further, since the apparent density of the elastic foam is high and the strength is increased at the end in the spiral direction, the elastic foam is in contact with other parts such as a cleaning roller rotation mechanism at the end in the spiral direction. Even if it happens, it can be prevented from being broken or peeled off. Further, unlike the present invention, when the end of the elastic foam in the spiral direction is covered and pressed against the shaft, the cleanable area of the elastic foam becomes narrow due to the presence of the cap. The cleaning roller does not have a narrow cleaning area, and no other parts such as a cap are required.

  Further, in the band-like elastic foam 21A before being wound around the shaft 11 shown in FIGS. 5 and 6, a predetermined position from the tip 22 on the end portion 25 side in the spiral direction when wound around the shaft 11 spirally. Then, the elastic foam is cut from the surface by cutting 24 leaving at least a part of the elastic foam, and when the hot pressing is performed, the cutting 24 is performed as shown in FIGS. 7A and 7B. The belt-shaped elastic foam 21 may be hot-pressed on the distal end side in the spiral direction with respect to the cutting site. The notches 24 are preferably formed so as to be parallel to the axial direction of the shaft 11 and leave a width of 1 mm or more along the axial direction of the shaft 11. In that case, the band-shaped elastic foam 21 wound spirally around the outer periphery of the shaft 11 has the surface of the elastic foam 21 cut and separated at the cutting site by the notch 24. Therefore, the band-shaped elastic foam 21 When 21 is compressed by hot pressing on the tip 22 side from the cutting site, the surface of the elastic foam 21 is not pulled in the portion inside the cutting site. As a result, the end 25 of the band-like elastic foam 21 is maintained in a pointed state in which the ridgeline on the surface of the elastic foam 21 is not rounded at the cutting site, and the obtained cleaning roller is Further, a better scraping effect can be obtained by the sharp ridge line portion of the elastic foam.

  PU-1 to PU-3 flexible polyurethane foams shown in Table 1 having a thickness of 2.7 mm on one side and a base material made of a polyester nonwoven fabric (glass transition point: 78 ° C.) on both sides of an adhesive (glass) A double-sided adhesive tape having a thickness of 0.16 mm to which a transition point: −30 ° C. is attached is attached, and the band c shown in FIG. 5 is cut to have a width c of 5 mm and an angle δ of the tip 22 in the length direction Y of 60 degrees. An elastic foam was prepared. PU-1 polyurethane foam is product name: DP-60, manufactured by INOAC Corporation, PU-2 polyurethane foam is product name: DP-61, manufactured by INOAC Corporation, and PU-3 polyurethane foam is product name. : RR-26, manufactured by Inoac Corporation. The apparent density is based on JIS K 7222, the hardness is based on JIS K 6400-2, 25% compression hardness, the tensile strength is based on JIS K 6400-5, the elongation is based on JIS K 6400-5, and the strain is based on JIS K 6400-4. . In addition, the following Examples 1-25 and a comparative example are examples which do not provide the said cut | notch 24 in the edge part of the said elastic foam.

The prepared strip-like elastic foam is set to the outer periphery of a steel shaft having a diameter of 4 mm and a length of 230 mm with the double-sided adhesive tape facing the shaft, and the angle θ with the shaft center line L shown in FIG. Then, 5 mm was left on both ends of the shaft, and it was wound spirally. Then, the edge part of the spiral direction of a strip | belt-shaped elastic foam was hot-pressed on the hot press conditions shown in Table 2-Table 4, and the cleaning roller of the Example was manufactured. The press shapes in Tables 2 to 4 are the planar shapes of the hot-pressed portion, and the press area is the area of the hot-pressed portion. In Examples 1 and 4 in which the press shape is triangular and the press area is 13.86 mm ² , the distance in the direction perpendicular to the axis of the shaft from the spiral foam tip (corresponding to 22 in FIG. 3) of the elastic foam (see FIG. 3 is an example in which i) of 3 is hot-pressed with an iron rod having a triangular pressing surface. Further, Examples ² , 6, 8, 10, 12, 14, 16, 18, ²⁰ , 22, and 24 having a press shape of a triangle and a press area of 3.46 mm ² are the tips in the spiral direction of the elastic foam (see FIG. 3 is equivalent to 22 in the direction perpendicular to the axis of the shaft (i in FIG. 3) is 2 mm, and is hot-pressed with an iron rod having a triangular pressing surface. On the other hand, Examples 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, and 25 having a circular press shape and a press area of 3.14 mm ² pressed the end of the elastic foam. This is an example in which a surface is hot-pressed with a steel rod-shaped body having a diameter of 2 mm.

  For comparison, a cleaning roller of a comparative example that was not subjected to hot pressing was manufactured. The cleaning rollers of the example and the comparative example were left in an environment of 50 ° C. for 2 weeks, and the distance d peeled off from the end of the elastic foam 21 was measured as shown in FIG. In addition, the cleaning roller of the example and the comparative example are attached to an actual machine (laser printer) having a charging roller having a diameter of 7.8 mm and a photosensitive drum having a diameter of 20 mm, with an axial distance between the charging roller and the cleaning roller being 8 mm. Printing was performed with% printing, and the number of printed sheets until peeling occurred at the end of the elastic foam was measured. The measurement results are shown in the lower part of Tables 2 to 4. The values in the peeling column by actual machines in Tables 2 to 4 are the number of printed sheets until peeling occurs.

  As shown in the measurement results shown in Tables 2 to 4, all of the cleaning rollers of the examples are not peeled off by being left and are not peeled after printing 30000 sheets, and the end of the elastic foam is difficult to peel off. I understand. On the other hand, it can be seen that the cleaning roller of the comparative example is peeled off when left untreated, and the peeling occurs before 2000 sheets, and the end of the elastic foam is easily peeled off.

  Moreover, the hot press in Examples 6-9 is performed with respect to the edge part of the strip | belt-shaped elastic foam (after sticking a double-sided adhesive tape) before winding around a shaft, others are the same as Examples 6-9 previously. The cleaning rollers for the press 6 to the first press 9 were prepared, and the peel-off distance was measured in the same manner as described above, and the number of printed sheets until peeling occurred in the actual machine was measured. The measurement results are shown in Table 5 together with the results of Examples 6-9. “Pre-press” in the column “Pre-press / Post-press” in Table 5 indicates that the band-shaped elastic foam before being wound around the shaft was hot-pressed, while “Post-press” was after winding around the shaft. It shows that the hot pressing was performed on the belt-like elastic foam.

  As shown in the measurement results of Table 5, the cleaning rollers of the first presses 6 to 9 were not peeled off by being left like the cleaning rollers of Examples 6 to 9 of the post press. Further, regarding the number of printed sheets until peeling on the actual machine, the number of cleaning rollers of the first presses 6 to 9 was 30000 or more, but the cleaning rollers of Examples 6 to 9 of the subsequent press correspond to the corresponding first presses. The number of printed sheets until peeling was larger than that of the cleaning rollers 6 to 9 and was more difficult to peel. From this, it can be seen that the end of the elastic foam is more difficult to peel off by heat-pressing the end of the elastic foam after the belt-like elastic foam is wound around the shaft in a spiral manner.

  Moreover, the cleaning roller of the Example which carried out the hot pressing after forming the notch in the edge part of a strip | belt-shaped elastic foam was produced as follows. The distance in the direction perpendicular to the axis of the shaft from the tip (corresponding to 22 in FIG. 5) at the longitudinal end of the band-like elastic foam with the double-sided adhesive tape adhered to one side of the flexible polyurethane foam in Example 6 (Corresponding to i in FIG. 3) is at a position of 2 mm, and when the belt-like elastic foam is spirally wound around the shaft, it is not on the side that is the hypotenuse of the end (corresponding to the side indicated by symbol E in FIG. 3). The elastic foam excluding the double-sided adhesive tape was cut with a Thomson blade, leaving a cut portion of 1 mm, and a cut parallel to the shaft axis was formed in the same manner as the cut 24 in FIG. Thereafter, the belt-shaped elastic foam is wound around the shaft so that the double-sided adhesive tape is on the shaft side, and the range between the cut portion by cutting and the tip of the end is hot pressed under the same hot press conditions as in Example 6. Thus, a cleaning roller with a cut was produced. The cleaning roller with cuts thus produced was left in an environment of 50 ° C. for 2 weeks in the same manner as in the other examples, and the peeling distance d was measured. As a result, the neglected peeling distance d was 0, and there was no peeling.

DESCRIPTION OF SYMBOLS 10 Cleaning roller 11 Shaft 21 Band-shaped elastic foam 24 Notch 25 End part of band-shaped elastic foam 27 Adhesive layer which consists of adhesion layer or adhesion layer

Claims (4)

A belt-shaped elastic foam is spirally wound around the outer periphery of the shaft, and is a cleaning roller fixed to the outer surface of the shaft by adhesion or adhesion,
The cleaning roller characterized in that the band-like elastic foam wound around the outer periphery of the shaft spirally has an apparent density at the end in the spiral direction and a smaller thickness than the other part.   The band-shaped elastic foam is fixed to the outer surface of the shaft through a fixing layer in which a pressure-sensitive adhesive or an adhesive is attached to both surfaces of the base material, and the pressure-sensitive adhesive or the adhesive enters the band-shaped elastic foam. The cleaning roller according to claim 1, wherein the cleaning roller is fixed in an impregnated state. In the manufacturing method of the cleaning roller in which the belt-shaped elastic foam is spirally wound around the outer periphery of the shaft and fixed to the outer surface of the shaft by adhesion or adhesion,
An adhesive or sticky fixing layer is provided on one side of the band-shaped elastic foam, and the band-shaped elastic foam is spirally wound around the outer periphery of the shaft so that the fixing layer is on the shaft side,
A method of manufacturing a cleaning roller, comprising: compressing an end of the belt-shaped elastic foam in a spiral direction against an outer surface of the shaft by hot pressing and fixing the compressed shape.   Cutting the band-shaped elastic foam from the surface, leaving at least a part on the end side in the spiral direction, and hot-pressing the band-shaped elastic foam on the tip side in the spiral direction from the cut portion The method of manufacturing a cleaning roller according to claim 3.

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