roll

Abstract

To provide a roll capable of expanding a contact surface area to a surface to be cleaned, and improving effect of absorbing liquid such as moisture.SOLUTION: A roll 10 having a roll part 1 and a pedestal 2 is such that: the roll part 1 is formed by laminating two kinds of roll pieces 3a, 3b comprising a nonwoven fabric of a synthetic resin porous body, and having a substantially circular ring shape and different external diameters in the outer periphery of the pedestal 2; the pedestal 2 has two flanges 4a, 4b having a substantially circular plate shape or a substantially circular ring shape and contacting the roll pieces 3a, 3b in both ends, and a rotational shaft 5 to which the two flanges 4a, 4b are locked or fastened; a discharge hole 6 is provided at least at one side of the rotational shaft 5; the external surface of the roll part 1 is formed with a plurality of steps 8 along a longitudinal direction; and the external diameter of the flanges 4a, 4b is smaller than the external diameter of the roll piece 3a with a small external diameter.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a roll for removing, squeezing, washing, and sucking up water, oil, or liquid chemical components adhering to the surface to be washed of steel plates, non-ferrous metal plates, resin plates, glass, paper, or film-like sheets. [Background technology]

[0002] Conventionally, rolls for removing, squeezing, cleaning, and sucking moisture and the like adhering to a surface to be cleaned have been known (Patent Documents 1 and 2).

[0003] The roll described in Patent Document 1 is a water-draining device in which a water-treated part is passed between a pair of absorbent sponge rollers to remove water droplets adhering to the surface of the part, and the absorbent sponge of the absorbent sponge roller has multiple slits in the roller rotation direction and thrust direction.

[0004] Furthermore, Figures 4 and 5 of Patent Document 2 show a grooved nonwoven fabric roll in which grooves are formed by using a large nonwoven fabric and a small roll body constituent member, and by placing the roll opposite a flat-surfaced rubber roll, squeezed water and the like flows through the grooves and is discharged to the outside, thereby reducing the amount of water and the like impregnated into the nonwoven fabric. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 4-129218 [Patent Document 2] Jikko No. 61-392 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the roll described in Patent Document 1 above has the problem that it is too soft, which easily creates gaps where it does not come into contact with the surface to be cleaned, and is therefore insufficient in its effectiveness at absorbing moisture, etc. Furthermore, the roll described in Patent Document 2 above has grooves formed for the purpose of draining moisture, etc., and is not intended to increase the contact area with the surface to be cleaned, so it has the problem that it is insufficient in its effectiveness at absorbing liquids such as moisture adhering to the side surfaces of holes, etc., formed on the surface to be cleaned.

[0007] The present invention solves the above-mentioned conventional problems, and aims to provide a roll that can increase the contact area with the surface to be cleaned and improve the effect of absorbing liquids such as water. [Means for solving the problem]

[0008] In order to solve the above-mentioned conventional problems, the invention of claim 1 is a roll for removing, squeezing, washing, and sucking water, oil, or liquids such as chemical ingredients adhering to the surface to be washed of a steel plate, a non-ferrous metal plate, a resin plate, glass, paper, or a film-like sheet, the roll having a roll portion and a base, the roll portion being approximately annular in shape and formed by stacking two types of roll pieces with different outer diameters on the outer periphery of the base, the base being approximately disk-shaped or approximately annular in shape and having two flanges that abut against the roll pieces at both ends and a rotating shaft to which each of the two flanges is engaged or fixed, at least one side of the rotating shaft having a discharge hole, and when in use while connected to a suction device, the liquid in the roll portion is discharged to the outside from the discharge hole, the outer surface of the roll portion having a plurality of steps formed along the longitudinal direction, and the outer diameter of the flanges being smaller than the outer diameter of the roll piece with the smaller outer diameter.

[0009] In the invention of claim 1, two types of roll pieces with different outer diameters are used, so that uneven steps are formed on the outer surface of the roll part, and the outer diameter of the flange is made smaller than the outer diameter of the roll piece with the smaller outer diameter. This makes it possible to deform the two types of roll pieces with different outer diameters, thereby increasing the contact area with the surface to be cleaned and improving the effect of absorbing liquid.

[0010] The invention of claim 2 is characterized in that, in the invention of claim 1, the roll pieces are made of nonwoven fabric and / or porous synthetic resin. As a result, when all of the roll pieces are made of only nonwoven fabric or only porous synthetic resin, regardless of the difference in outer diameter, a roll that exhibits highly uniform suction performance can be formed. Furthermore, when one of the roll pieces with different outer diameters is made of nonwoven fabric and the other is made of porous synthetic resin, the rigidity of the nonwoven fabric stabilizes the overall shape of the roll, and the porous synthetic resin allows for efficient suction in accordance with the characteristics of the liquid adhering to the surface to be cleaned.

[0011] The invention of claim 3 is characterized in that the roll piece with a larger outer diameter has a larger internal porosity than the roll piece with a smaller outer diameter in the invention of claim 1 or 2. As a result, the roll piece with a larger outer diameter that comes into contact with the surface to be cleaned first has a larger internal porosity, so when sucking the liquid, a water channel is preferentially formed inside the roll piece with a larger outer diameter, and the liquid can be sucked efficiently.

[0012] The invention of claim 4 is characterized in that, in the invention of any one of claims 1 to 3, a coating layer having lower liquid permeability than the porous synthetic resin body is formed on the side surface of the roll piece with a larger outer diameter and / or the roll piece with a smaller outer diameter. As a result, when sucking liquid, water channels are preferentially formed inside the roll piece with a larger outer diameter, allowing for efficient sucking of liquid. In addition, the improved rigidity of the roll piece prevents excessive tilting or falling when it comes into contact with the surface to be cleaned, making it less likely for gaps to form and allowing for efficient sucking of liquid.

[0013] The invention of claim 5 is characterized in that in any one of the inventions of claims 1 to 4, the roll piece with a larger outer diameter has a smaller length in the thickness direction than the roll piece with a smaller outer diameter. As a result, the roll piece with a larger outer diameter that comes into contact with the surface to be cleaned first has a smaller thickness, and therefore can bend easily and flexibly deform when it comes into contact with the surface to be cleaned, thereby preventing damage to the surface to be cleaned.

[0014] The invention of claim 6 is characterized in that, in the invention of any one of claims 1 to 5, the outer peripheral end of the roll piece with a large outer diameter is formed with a slit, which allows it to flexibly deform while following the shape of the surface to be cleaned, and further prevents damage to the surface to be cleaned.

[0015] The invention of claim 7 is characterized in that, in the invention of any one of claims 1 to 6, when the roll portion is in use and comes into contact with the surface to be cleaned, the outer peripheral end of the roll piece with the larger outer diameter tilts, and the side of the roll piece with the larger outer diameter comes into contact with the end face of the roll piece with the smaller outer diameter. As a result, when in use, a gap is less likely to occur between the surface to be cleaned and the outer surface of the roll portion, and the roll portion as a whole can efficiently suck up liquid.

[0016] The invention of claim 8 is characterized in that, in the invention of claim 7, the length in the thickness direction of the small diameter portion, which is formed by stacking one or more roll pieces with a small outer diameter in succession, is equal to or less than half the difference in outer diameter from the roll piece with a large outer diameter. As a result, when the roll piece with a large outer diameter tilts, it covers more than half of the thickness of the roll piece with a small outer diameter (the total thickness of the roll pieces in the case of multiple roll pieces), allowing efficient suction by the roll piece with a large outer diameter. Furthermore, the roll piece with a large outer diameter may cover the entire roll piece with a small outer diameter (small diameter portion). Note that when the roll piece with a large outer diameter tilts, liquid is also transferred to the roll piece with a small outer diameter, allowing efficient suction of liquid throughout the entire roll section.

[0017] The invention of claim 9 is characterized in that, in the invention of any one of claims 1 to 8, the roll pieces have suction grooves formed radially from the inner peripheral surface to the outer peripheral surface, thereby allowing the suction force from the suction device to be applied directly to the surface to be cleaned, thereby efficiently sucking the liquid.

[0018] The invention of claim 10 is characterized in that, in any one of the inventions of claims 1 to 9, the roll piece with a large outer diameter has grooves formed in the circumferential direction of the outer circumferential surface. As a result, even if the surface to be cleaned has unevenness, the roll piece with a large outer diameter can be brought into contact with the uneven parts, thereby increasing the contact area with the surface to be cleaned and improving the effect of absorbing liquid.

[0019] The invention of claim 11 is characterized in that, in the invention of any one of claims 1 to 10, an annular groove is formed on one side surface of the roll piece having a larger outer diameter. This makes it easier for the roll piece having a larger outer diameter to tilt toward the side surface on which the annular groove is formed, thereby achieving uniform suction performance. [Effects of the Invention]

[0020] The roll invention of claim 1 can increase the contact area with the surface to be cleaned and improve the effect of absorbing liquids such as water. The invention of claim 2 improves the elasticity and suction force. In addition, the overall shape is stable and the liquid adhering to the surface to be cleaned can be efficiently sucked.

[0021] In the inventions of claims 3 and 4, when sucking liquid, water channels are preferentially formed inside the roll pieces with larger outer diameters, allowing for efficient sucking of liquid. In addition, the inventions of claims 5 and 6 can prevent damage to the surface to be cleaned. In addition, the inventions of claims 7 and 8 can efficiently suck liquid throughout the roll as a whole.

[0022] The invention of claim 9 allows the suction force from the suction device to be applied directly to the surface to be cleaned, thereby efficiently sucking up the liquid. The invention of claim 10 can increase the contact area with the surface to be cleaned and improve the liquid absorption effect. The invention of claim 11 can achieve uniform suction performance. [Brief explanation of the drawings]

[0023] [Figure 1] (a) Front view of the roll according to the present invention. (b) Cross-sectional view of the roll according to the present invention. (c) Cross-sectional view showing another embodiment of the roll according to the present invention. [Figure 2] (a) A perspective view showing a first embodiment of a roll piece and a reference diagram showing an enlarged view of the inside. (b) A perspective view showing a second embodiment of a roll piece and a reference diagram showing an enlarged view of the inside. [Figure 3] FIG. 1 is a perspective view showing a state in which a roll according to the present invention is connected to a suction device. [Figure 4] (a) A cross-sectional view showing the roll according to the present invention during workpiece cleaning. (b) A cross-sectional view showing the tilting of the roll pieces of the roll portion. (c) A cross-sectional view showing another example of the tilting of the roll pieces of the roll portion. [Figure 5] (a) A perspective view showing a third embodiment of the roll piece; (b) A perspective view showing a fourth embodiment of the roll piece; (c) A perspective view showing a fifth embodiment of the roll piece; (d) A perspective view and an AA cross-sectional view showing a sixth embodiment of the roll piece; (e) A perspective view and an BB cross-sectional view showing a seventh embodiment of the roll piece; (f) A perspective view showing an eighth embodiment of the roll piece; [Figure 6] (a) to (h) are cross-sectional views showing first to eighth embodiments of a roll unit using roll pieces on which a coating layer is formed. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to these embodiments. Fig. 1(a) is a front view of a roll according to the present invention, and Fig. 1(b) is a cross-sectional view of the roll according to the present invention. Fig. 1(c) is a cross-sectional view showing another embodiment of the roll according to the present invention. An overview of the roll according to the present invention will be described below using these drawings.

[0025] The roll 10 according to the present invention is a roll for removing, squeezing, cleaning, and sucking up water, oil, or liquid chemical components adhering to the surface to be cleaned of a steel plate, a non-ferrous metal plate, a resin plate, glass, paper, or a film-like sheet, and has a roll portion 1 and a base 2.

[0026] The roll portion 1 is made of nonwoven fabric and / or porous synthetic resin, has a roughly circular ring shape, and is formed by stacking two types of roll pieces 3a and 3b with different outer diameters on the outer periphery of a base 2.

[0027] The base 2 is generally disk-shaped or annular-shaped, and has two flanges 4a, 4b that contact the roll pieces at both ends, and a rotating shaft 5 to which the two flanges 4a, 4b are engaged or fixed via fasteners 9a, 9b, respectively. A discharge hole 6 is formed on at least one side of the rotating shaft 5 to discharge the liquid sucked from the roll part 1 to the outside. In addition, a number of holes 7 are formed on the outer circumferential surface of the rotating shaft 5, and these holes 7 are in communication with the discharge hole 6.

[0028] When in use while connected to a suction device, the liquid in the roll portion 1 is discharged to the outside through the discharge hole 6, and the outer surface of the roll portion 1 has multiple steps 8 formed along the longitudinal direction, and the outer diameter of the flanges 4a, 4b is smaller than the outer diameter of the roll piece 3a, which has the smaller outer diameter.

[0029] The roll 10 configured as described above has uneven steps 8 formed on the outer surface of the roll portion 1, and the outer diameter of the flanges 4a, 4b is smaller than the outer diameter of the roll piece 3a with the smaller outer diameter. This makes it possible to deform the two types of roll pieces 3a, 3b with different outer diameters, thereby increasing the contact area with the surface to be cleaned and improving the effect of absorbing liquid.

[0030] 1(c), the present invention also includes a configuration in which the rotation shafts 15a, 15b of the base 12 are separated into left and right, and multiple shafts 13a, 13b penetrating the roll portion 11 are fixed to the flanges 14a, 14b. In this case, the cavity 16b formed by the inner rings of the roll pieces 3h, 3i communicates with the discharge hole 16a formed in one of the rotation shafts 15b.

[0031] FIG. 2(a) is a perspective view and a reference diagram showing an enlarged view of the inside of a first embodiment of the roll piece. The roll piece 3a shown in this figure has a smaller outer diameter than the roll piece 3b shown in FIG. 2(b). It uses a nonwoven fabric composed of fibers 25, a binder 26 that bonds the fibers together, and voids that occupy the area other than the fibers 25 and the binder 26. In the roll portion constituting the present invention, the roll piece with a smaller outer diameter can be made of a nonwoven fabric or a porous synthetic resin, and the roll piece with a larger outer diameter can be made of a porous synthetic resin. This improves the elasticity and suction power when all roll pieces are made of a porous synthetic resin, regardless of the outer diameter. On the other hand, when the roll piece with a smaller outer diameter is made of a nonwoven fabric, the rigidity of the nonwoven fabric stabilizes the overall shape, and the roll piece with a larger outer diameter can efficiently suck up liquid adhering to the surface to be cleaned because it is made of a porous synthetic resin.

[0032] Nonwoven fabrics can be manufactured using a chemical bonding method, in which a polymeric elastomer containing a crosslinking agent is applied to a substrate formed by accumulating multiple fibers in a flat plate and entangling them three-dimensionally, using methods such as spraying, dipping, or impregnation, and then heated to bond the fibers. Other methods that can be used include hydroentanglement, spunbonding, meltblowing, fiberbonding, and thermal bonding. The fibers forming the nonwoven fabric can be natural fibers such as cotton, rayon, or cellulose, or synthetic resin fibers such as polyester, nylon, or acrylic, used alone or in combination. The polymeric elastomer can be nitrile rubber, acrylic rubber, styrene rubber, urethane rubber, acrylic resin, or urethane resin, used alone or in combination.

[0033] FIG. 2(b) is a perspective view and a reference diagram showing an enlarged view of the interior of a second embodiment of the roll piece. The roll piece 3b shown in this figure has a larger outer diameter than the roll piece 3a shown in FIG. 2(a). It uses a sponge composed of open cells 27a, closed cells 27b, and synthetic fibers occupying the areas other than the open cells 27a and closed cells 27b. The inner diameter of the circular hole 23 of the roll piece 3a and the inner diameter of the circular hole 24 of the roll piece 3b are approximately the same. It is preferable that the roll piece with a larger outer diameter of the roll portion constituting the present invention has a larger internal porosity than the roll piece with a smaller outer diameter. This allows the roll piece with a larger outer diameter, which contacts the surface to be cleaned first, to have a larger internal porosity. Therefore, when liquid is sucked, water channels are preferentially formed inside the roll piece with a larger outer diameter, allowing for efficient liquid suction. It is also preferable that the roll piece with a larger outer diameter has a shorter thickness than the roll piece with a smaller outer diameter. As a result, the roll piece with the larger outer diameter that first comes into contact with the surface to be cleaned has a small thickness, so it is easy to bend and can deform flexibly when it comes into contact with the surface to be cleaned, thereby preventing damage to the surface to be cleaned.

[0034] The internal porosity (air porosity) of the synthetic resin porous body is preferably about 60 to 90%, and more preferably about 80 to 85%. By appropriately selecting the internal porosity depending on the viscosity of the liquid, it is possible to improve both the liquid suction efficiency and durability.

[0035] In addition, a method for producing a synthetic resin porous body can employ a polyurethane that has been made porous with extremely fine bubbles by, for example, immersing polyurethane in water and injecting carbon dioxide into the water to cause carbon dioxide foaming. As the polymeric elastomer, nitrile rubber, acrylic rubber, styrene rubber, urethane rubber, acrylic resin, urethane resin, etc. can be used alone or in combination as the polymeric elastomer, in addition to polyurethane.

[0036] FIG. 3 is a perspective view showing the rolls according to the present invention connected to a suction device. Rollers 10, 10 are installed in a pair in a cleaning device 40. A constant pressure is applied to the rotation shaft 5 of the upper roll 10. The rotation shafts 5 of the upper and lower rolls 10, 10 are connected to drive means 17a, 17b via joints 18a, 18b. These drive means 17a, 17b rotate the rolls in the directions indicated by the arrows. A glass sheet 30 with water or other liquid adhering to its front, back, and side surfaces is sent between the upper and lower rolls 10 in the direction indicated by the white arrow. The interiors of the rotation shafts 5, 5 are connected to a vacuum pump 22 via pipes 19a, 19b. The upper and lower rolls 10, 10 remove water or other liquid from the front, back, and side surfaces of the glass sheet 30 and from the edges of holes 30a, 30b, and 30c formed in the glass sheet 30.

[0037] With the rolls 10, 10 in the state described above, when the vacuum pump 22 is operated to apply a vacuum suction force, a negative pressure is applied to the roll portion, and the liquid absorbed in the roll portion is sucked out of the rolls 10, 10 through the discharge holes formed inside the rotating shafts 5, 5, through the pipes 19a, 19b, and is then discharged.

[0038] FIG. 4(a) is a cross-sectional view showing the roll according to the present invention during workpiece cleaning. When the rolls 10, 10 remove liquids such as moisture from the front and back surfaces and side surfaces of a glass sheet 30 and from the edges of holes formed in the glass sheet, the tip of the roll piece 3b with the larger outer diameter tilts and contacts the front and back surfaces of the glass sheet or the edges of the holes. The end face of the roll piece 3a with the smaller outer diameter contacts the front and back surfaces of the glass sheet. Furthermore, because the outer diameters of the flanges 4a, 4b are smaller than the outer diameter of the roll piece 3a with the smaller outer diameter, the two types of roll pieces 3a, 3b with different outer diameters can be deformed, thereby increasing the contact area with the surface to be cleaned and improving the liquid absorption effect.

[0039] FIG. 4(b) is a cross-sectional view showing the tilting of the roll pieces of the roll unit. Note that the surface to be cleaned, such as a glass plate, is not shown. As shown in this figure, when the roll unit is in use and abuts against the surface to be cleaned, the outer peripheral ends of the roll pieces 3o, 3o with the larger outer diameter of the roll unit 101 are tilted, and the side surfaces of the roll pieces 3o, 3o with the larger outer diameter abut against the end faces of the roll pieces 3p, 3p, 3p with the smaller outer diameter. This makes it less likely that a gap will form between the surface to be cleaned and the outer surface of the roll unit 101, allowing the roll unit 101 as a whole to efficiently suck up liquid.

[0040] FIG. 4(c) is a cross-sectional view showing another example of tilting of the roll pieces of the roll unit. The surface to be cleaned, such as a glass plate, is not shown. The roll unit 111 shown in this figure has a thickness direction length X of the small diameter portion 36, which is formed by continuously stacking multiple roll pieces 3r with small outer diameters, that is equal to or less than half the length Y of the difference in outer diameter between the roll piece 3r and the roll piece 3q with large outer diameters. This allows the roll piece 3q with large outer diameters to cover more than half of the small diameter portion 36 when tilted, thereby enabling efficient suction. Alternatively, as shown in FIG. 4(c), the roll piece 3q with large outer diameters may cover the entire small diameter portion 36. When the roll piece 3q with large outer diameters tilts, liquid is also transferred to the roll piece 3r with small outer diameters, allowing the entire roll unit to efficiently suction liquid. Furthermore, even if there is only one roll piece 3r with a small outer diameter sandwiched between roll pieces 3q and 3q with a large outer diameter, it is possible to establish the relationship X≦Y by using the thickness of the roll piece 3r as the small diameter portion 36.

[0041] 5(a) is a perspective view showing a third embodiment of the roll piece. A slit 28 is formed in the outer peripheral end of the roll piece 3c shown in this figure. The roll piece 3c having the slit 28 formed in the outer peripheral end can be applied to both roll pieces with small outer diameters and roll pieces with large outer diameters. However, by applying it to a roll piece with a large outer diameter, it becomes possible to flexibly deform while following the shape of the surface to be cleaned, thereby preventing damage to the surface to be cleaned.

[0042] Fig. 5(b) is a perspective view showing a fourth embodiment of the roll piece. The roll piece 3d shown in this figure has a coating layer 29 formed on the entire side surface, which has lower liquid permeability than the porous synthetic resin body. As a result, when sucking liquid, water channels are preferentially formed inside the roll piece with a larger outer diameter, allowing the liquid to be sucked efficiently. Note that, as described below, multiple patterns can be applied to the combination of roll pieces with a large outer diameter and / or roll pieces with a small outer diameter having the coating layer 29 formed on the side surface.

[0043] 5(c) is a perspective view showing a fifth embodiment of the roll piece. The roll piece 3e shown in this figure has suction grooves 35 formed radially from the inner peripheral surface to the outer peripheral surface. This allows the suction force from the suction device to be applied directly to the surface to be cleaned, allowing the liquid to be sucked in efficiently.

[0044] 5(d) is a perspective view and an AA cross-sectional view showing a sixth embodiment of the roll piece. The roll piece 3f shown in this figure has grooves 32 formed in the circumferential direction of the outer circumferential surface. If this roll piece 3f is applied to a roll piece with a large outer diameter of the roll portion, even if the surface to be cleaned has unevenness, the roll piece with the large outer diameter can be brought into contact with the uneven parts, thereby increasing the contact area with the surface to be cleaned and improving the liquid absorption effect.

[0045] 5(e) is a perspective view and a BB cross-sectional view showing a seventh embodiment of the roll piece. The roll piece 3g shown in this figure has an annular groove 33 formed on one side surface. If this roll piece 3g is applied to a roll piece with a large outer diameter of the roll portion, the roll piece with the large outer diameter can be easily tilted toward the side surface on which the annular groove 33 is formed, thereby achieving uniform suction performance.

[0046] Fig. 5(f) is a perspective view showing an eighth embodiment of the roll piece. The roll piece 3h shown in this figure is a roll piece that is applied to the base 12 described in Fig. 1(c), and a plurality of through holes 34, 34... through which the shafts 13a, 13b pass are formed on the side surface of the roll piece 3h.

[0047] FIG. 6(a) is a cross-sectional view showing a first embodiment of a roll unit using roll pieces with a coating layer. The roll unit 21 shown in this figure is an example in which roll pieces 3a with a small outer diameter and no coating layer are alternately stacked with roll pieces 3i with a large outer diameter and a coating layer formed on the right side of the drawing. In this embodiment, water channels are preferentially formed inside the roll pieces 3i with a large outer diameter, allowing for efficient suction of liquid. Furthermore, the improved rigidity of the roll pieces 3i with a large outer diameter prevents excessive tipping when they come into contact with the surface to be cleaned, reducing the likelihood of gaps and allowing for efficient suction of liquid.

[0048] FIG. 6(b) is a cross-sectional view showing a second embodiment of a roll unit using roll pieces with a coating layer. The roll unit 31 shown in this figure is an example in which roll pieces 3a with a small outer diameter and no coating layer are alternately stacked with roll pieces 3j with a large outer diameter and a coating layer formed on the portion of the roll piece 3a with a small outer diameter on the right side of the drawing. In this embodiment, no coating layer is formed on the tip of the roll piece 3j with a large outer diameter, where the coating layer contacts the surface to be cleaned, and liquid can be efficiently sucked in without the coating layer coming into contact with the surface to be cleaned. On the other hand, because a coating layer is formed on the portion of the roll piece 3j with a small outer diameter, water channels are preferentially formed inside the roll piece 3j with a large outer diameter, allowing liquid to be efficiently sucked in.

[0049] 6(c) is a cross-sectional view showing a third embodiment of a roll unit using roll pieces with a coating layer. The roll unit 41 shown in this figure is an example in which roll pieces 3a with a small outer diameter and no coating layer are alternately stacked with roll pieces 3k with a large outer diameter and a coating layer formed on the left and right side surfaces where they contact the roll pieces 3a with a small outer diameter. This embodiment forms a more limited water channel inside the roll pieces 3k with a large outer diameter, allowing for efficient suction of liquid.

[0050] FIG. 6(d) is a cross-sectional view showing a fourth embodiment of a roll unit using roll pieces with a coating layer. The roll unit 51 shown in this figure is an example in which roll pieces 3b with a large outer diameter and no coating layer are alternately stacked with roll pieces 3l with a small outer diameter and a coating layer formed on the left side of the figure where it contacts the roll piece 3b with a large outer diameter. This embodiment allows water channels to be preferentially formed inside the roll piece 3b with a large outer diameter, thereby enabling efficient suction of liquid. Furthermore, the rigidity of the roll piece 3l with a small outer diameter is improved, preventing excessive tilting or depression when it contacts the surface to be cleaned. This reduces the likelihood of gaps and allows efficient suction of liquid.

[0051] Fig. 6(e) is a cross-sectional view showing a fifth embodiment of a roll unit using roll pieces with a coating layer. The roll unit 61 shown in this figure is an example in which roll pieces 3b with a large outer diameter and no coating layer are alternately stacked with roll pieces 3m with a small outer diameter and a coating layer formed on the left and right side surfaces of the roll pieces 3b with a large outer diameter 3m. In this embodiment, the rigidity of the roll pieces 3m with a small outer diameter is further improved compared to the roll pieces 3l with a small outer diameter in Fig. 6(d). This makes it possible to suppress excessive tilting or depression when contacting the surface to be cleaned, and further enables efficient suction of liquid.

[0052] FIG. 6(f) is a cross-sectional view showing a sixth embodiment of a roll unit using roll pieces with coating layers. The roll unit 71 shown in this figure is an example in which roll pieces 3l with a small outer diameter, on which a coating layer is formed on the portion of the roll piece 3j with a large outer diameter on the left side of the drawing, and roll pieces 3j with a large outer diameter, on which a coating layer is formed on the portion of the roll piece 3l with a small outer diameter on the right side of the drawing, are alternately stacked, so that the coating layers of the roll pieces 3j and 3l are in contact with each other. This embodiment combines the functions of both the roll pieces 3j with a large outer diameter described in FIG. 6(b) and the roll pieces 3l with a small outer diameter described in FIG. 6(d). Furthermore, by arranging the roll pieces so that their coating layers are in contact with each other, the roll pieces support each other, which further reduces tilting and depression when they come into contact with the surface to be cleaned, thereby enabling more efficient liquid suction.

[0053] FIG. 6(g) is a cross-sectional view showing a seventh embodiment of a roll unit using roll pieces on which a coating layer has been formed. The roll unit 81 shown in this figure is an example in which roll pieces 3n with a small outer diameter, on which a coating layer has been formed on the portion of the right side in contact with the roll piece 3j with a large outer diameter, and roll pieces 3j with a large outer diameter, on which a coating layer has been formed on the portion of the right side in contact with the roll piece 3n with a small outer diameter, are alternately stacked. This embodiment is configured such that the coating layer of the roll piece 3j with a large outer diameter, as described in FIG. 6(b), and the coating layer of the roll piece 3l with a small outer diameter, as described in FIG. 6(d), are formed on the right side in the figure. While the basic function is as described above, the coating layer is distributed approximately evenly across the entire roll, which stabilizes the shape of the entire roll.

[0054] FIG. 6(h) is a cross-sectional view showing an eighth embodiment of a roll unit using roll pieces with a coating layer. The roll unit 91 shown in this figure is an example in which roll pieces 3m with a small outer diameter, on which a coating layer is formed on the portion of the left and right side surfaces that contact the roll pieces 3k with a large outer diameter, are alternately stacked, and roll pieces 3k with a large outer diameter, on which a coating layer is formed on the portion of the left and right side surfaces that contact the roll pieces 3m with a small outer diameter, are alternately stacked, so that the coating layers of the roll pieces 3m and the roll pieces 3k contact each other. This embodiment combines the functions of both the roll pieces 3k with a large outer diameter shown in FIG. 6(c) and the roll pieces 3m with a small outer diameter shown in FIG. 6(e). Furthermore, by arranging the coating layers so that they contact each other, the roll pieces support each other. This further reduces tilting and depression when contacting the surface to be cleaned compared to the roll unit 81 shown in FIG. 6(f), allowing for more efficient liquid suction. [Industrial Applicability]

[0055] The roll according to the present invention is used as a roll for removing, squeezing, washing, and sucking water, oil, or liquid chemical components adhering to the surface to be washed of a steel plate, a non-ferrous metal plate, a resin plate, glass, paper, or a film-like sheet. [Explanation of symbols]

[0056] 1, 11, 21, 31, 41, 51, 61, 71, 81, 91, 101, 111 Roll section 2, 12 pedestal 3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l, 3m, 3n, 3o, 3p, 3q, 3r roll piece 4a, 4b, 14a, 14b flanges 5, 15a, 15b Rotation axis 6, 16a Discharge hole 7 Hole 8 steps 9a, 9b Fasteners 10, 20 rolls 13a, 13b shaft 16b Cavity 17a, 17b driving means 18a, 18b joint 19a, 19b piping 22 Vacuum pump 23, 24 Circular hole 28 Slit 29 Coating Layer 30 Glass Plate 32 Groove 33 Circular groove 34 Through hole 35 Suction groove 36 Small diameter 40 Cleaning equipment

Claims

1. A roll used to remove, squeeze, wash and suck up water, oil or liquid chemicals adhering to the surface of steel plates, non-ferrous metal plates, resin plates, glass, paper or film sheets. The roll has a roll portion and a base, The roll portion has a substantially annular shape and is formed by stacking two types of roll pieces having different outer diameters on the outer periphery of the base, the base has a substantially disk-like or substantially annular shape, and includes two flanges that come into contact with the roll pieces at both ends, and a rotation shaft to which each of the two flanges is engaged or fixed, At least one side of the rotating shaft has a discharge hole, and when the device is used in a state connected to a suction device, liquid in the roll portion is discharged to the outside through the discharge hole, A roll characterized in that the outer surface of the roll portion has a plurality of steps formed along the longitudinal direction, and the outer diameter of the flange is smaller than the outer diameter of the roll portion having a smaller outer diameter.

2. 2. The roll according to claim 1, wherein the roll pieces are made of nonwoven fabric and / or porous synthetic resin.

3. 3. The roll according to claim 1, wherein the roll piece having a larger outer diameter has a larger internal porosity than the roll piece having a smaller outer diameter.

4. The roll according to any one of claims 1 to 3, characterized in that a coating layer having a lower liquid permeability than the synthetic resin porous body is formed on the side surface of the roll piece having a larger outer diameter and / or the roll piece having a smaller outer diameter.

5. The roll according to any one of claims 1 to 4, wherein the roll piece with a larger outer diameter has a length in the thickness direction smaller than that of the roll piece with a smaller outer diameter.

6. The roll according to any one of claims 1 to 5, characterized in that a slit is formed in the outer peripheral end of the roll piece having a larger outer diameter.

7. When the roll part is in contact with the surface to be cleaned, The roll according to any one of claims 1 to 6, characterized in that the outer peripheral end of the roll segment with a larger outer diameter is inclined, and the side surface of the roll segment with a larger outer diameter and the end surface of the roll segment with a smaller outer diameter come into contact with each other.

8. 8. The roll according to claim 7, wherein the length in the thickness direction of the small diameter portion, which is formed by laminating one or more roll pieces having a small outer diameter, is equal to or less than half the difference in outer diameter between the roll piece having a large outer diameter and the small diameter portion.

9. The roll according to any one of claims 1 to 8, wherein the roll pieces have suction grooves formed radially from the inner peripheral surface to the outer peripheral surface.

10. The roll according to any one of claims 1 to 9, wherein the roll piece having a larger outer diameter has a groove formed in the circumferential direction on the outer circumferential surface.

11. The roll according to any one of claims 1 to 10, wherein an annular groove is formed on one side surface of the roll piece having a larger outer diameter.

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