Perforated conveying roll, sheet material manufacturing apparatus, and sheet material processing apparatus
The perforated conveying roll with adjustable air discharge compartments addresses the issue of sheet material ends contacting the roll by enhancing air pressure to lift and separate them, preventing damage.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- KABUSHIKIKAISHA MIYAKO ROLLER KOGYO
- Filing Date
- 2025-09-30
- Publication Date
- 2026-05-20
AI Technical Summary
Existing perforated conveying rolls fail to prevent contact between sheet material ends, which are under stronger tension, and the roll, leading to potential damage.
The perforated conveying roll is divided into compartments by partition walls, allowing for adjustable air discharge pressure to lift and separate the sheet material ends from the roll, particularly at areas of higher tension.
Prevents contact between the sheet material ends and the roll by increasing air ejection pressure at compartments where higher tension is applied, effectively preventing damage.
Smart Images
Figure 2026084076000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a conveying roll, and more particularly to a conveying roll having ventilation holes through which air passes on its peripheral surface (hereinafter referred to as a "perforated conveying roll"), a sheet material manufacturing apparatus provided with the perforated conveying roll, and a sheet material processing apparatus.
Background Art
[0002] Resin-based films represented by optical films and various metal foils (hereinafter collectively referred to as "sheet materials") are conveyed by conveying rolls in a manufacturing apparatus. The sheet material is conveyed while being in contact with the conveying roll, but depending on the characteristics of the sheet material such as thickness and material, scratches may occur on the surface of the sheet material due to contact with the conveying roll.
[0003] Since scratches generated on the sheet material contribute to product defects, it is desired to manufacture a sheet material without scratches. Under such circumstances, the applicant of the present application has developed a perforated conveying roll in which two or more small chambers (partition chambers) communicating with the ventilation holes on the peripheral surface of the roll body are provided inside the roll body, and the air supplied to the partition chambers is ejected from the ventilation holes communicating with each partition chamber (Patent Document 1).
Prior Art Documents
Patent Documents
[0004]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0005] According to the perforated conveying roll of Patent Document 1, sheet material can be conveyed without contact and damage caused by contact with the conveying roll can be prevented. However, when the sheet material is suspended and conveyed by air, the ends of the sheet material in the width direction, which are under stronger tension than other parts, may come into contact with the perforated conveying roll, and there was room for improvement in this respect.
[0006] The present invention has been made in view of these circumstances, and its problem to be solved is to provide a perforated conveying roll that can prevent contact between parts that are subjected to stronger tension than other parts, particularly the ends on the widthwise side of the sheet material, and a sheet material manufacturing apparatus and a sheet material processing apparatus equipped with the perforated conveying roll. [Means for solving the problem]
[0007] [Perforated conveying roll] The perforated conveying roll of the present invention has an interior roll body that is divided into two or more compartments by partition walls arranged in a direction intersecting the roll body.
[0008] [Sheet material manufacturing equipment] The sheet material manufacturing apparatus of the present invention is a sheet material manufacturing apparatus equipped with a conveying roll, wherein the conveying roll is a perforated conveying roll of the present invention.
[0009] [Sheet material processing equipment] The sheet material processing apparatus of the present invention is a sheet material processing apparatus equipped with a conveying roll, wherein the conveying roll is a perforated conveying roll of the present invention. [Effects of the Invention]
[0010] According to the present invention, the air discharge pressure (jet pressure) can be adjusted in units of compartments separated by partitions arranged in a direction intersecting the roll body. Therefore, by increasing the jet pressure from the compartments located in areas where strong tension is applied, particularly at both ends in the width direction of the sheet material, contact of the conveyed object with the perforated conveying roll can be prevented. [Brief explanation of the drawing]
[0011] [Figure 1] (a) is a perspective view showing an example of a perforated conveying roll, and (b) is a cross-sectional view of the perforated conveying roll in (a). [Figure 2] A diagram illustrating the setup with air supply hoses installed in each compartment. [Figure 3] (a) is a perspective view showing another example of a perforated conveying roll, and (b) is a cross-sectional view of the perforated conveying roll in (a). [Figure 4] (a) is an explanatory diagram of the air layer formed inside the large diameter section, and (b) is an explanatory diagram of the movement of the air layer formed inside the large diameter section. [Figure 5] An explanatory diagram showing the case where the inner end face of the large diameter section is tapered. [Figure 6] (a) and (b) are explanatory diagrams showing other examples of perforated conveying rolls. [Figure 7] (a) is an explanatory diagram showing another example of a perforated conveying roll, and (b) is an explanatory diagram showing an example in which a resistance material is provided in the air passage. [Figure 8] A perspective view showing an example of a sheet material manufacturing apparatus equipped with perforated conveying rolls. [Figure 9] A side view showing an example of a sheet material processing apparatus equipped with perforated conveying rolls. [Modes for carrying out the invention]
[0012] (Embodiment of a perforated conveying roll) An example of an embodiment of the perforated conveying roll 10 of the present invention will be described with reference to the drawings. The perforated conveying roll 10 of the present invention is used in a non-rotating state and can be mounted and used in various devices that require the conveyance of sheet material X, including the sheet material manufacturing device 30 and sheet material processing device 40 described later.
[0013] As an example, the perforated conveying roll 10 shown in Figures 1(a) and 1(b) comprises a hollow roll body 11 and partition walls 13 that divide the inside of the roll body 11 into multiple compartments 12.
[0014] The roll body 11 of this embodiment is cylindrical with an opening 11a provided at one end in the longitudinal direction, and a plurality of ventilation holes 14 through which air passes are provided on its circumferential surface. The roll body 11 may be other than cylindrical, such as a square tube shape. Also, the roll body 11 may have openings 11a at both ends in the longitudinal direction.
[0015] The opening 11a of the roll body 11 is closed by a lid member 15 (Fig. 2). However, when it can be substituted by a partition wall 13 close to each opening 11a (the opening 11a can be closed), the lid member 15 can be omitted.
[0016] For the roll body 11, for example, a metal roll, a stainless steel roll, a carbon steel roll, a plated roll, a resin roll, a sprayed roll, an aluminum alloy roll, a sintered carbon roll, a sintered metal roll, etc. can be used. Also, a structure combining the above materials can be adopted.
[0017] In the case of a metal roll, a stainless steel roll, a carbon steel roll, a plated roll, a resin roll, or a sprayed roll, it is necessary to open the ventilation holes 14. However, when using sintered carbon or sintered metal alone for the roll body 11, a roll with fine pores through which air passes is formed due to the characteristics of the material, so there is no need to separately make holes, and the fine pores can be used as the ventilation holes 14.
[0018] As the metal roll, SS400 etc. can be used, as the stainless steel roll, SUS304, SUS440C etc. can be used, as the carbon steel roll, STKM13A, S25C etc. can be used, and as the plated roll, HCr plated roll, Ni plated roll etc. can be used.
[0019] Also, as the resin roll, MC nylon, PEEK etc. can be used, and as the sprayed roll, WC sprayed roll etc. can be used. In addition, those formed with amorphous films such as DLC films and SiOx typified by SiO2, SiC, etc. can also be used. These films may be formed on a coating such as HCr plating.
[0020] The ventilation holes 14 are provided around the entire circumference of the roll body 11, and each ventilation hole 14 communicates with one of the compartments 12 inside the roll body 11. The ventilation holes 14 can be perpendicular to the longitudinal and circumferential directions of the roll, or they can be angled. In some cases, a combination of perpendicular and angled holes can be used. The shape of the ventilation holes 14 can be straight or tapered.
[0021] The air supplied to the compartments 12 is ejected from the ventilation holes 14 that communicate with each compartment 12. The ventilation holes 14 can be arranged at equal or uneven intervals. The inner diameter of the ventilation holes 14 can also be uniform or uneven.
[0022] In this embodiment, four partition walls 13 are provided inside the roll body 11. Each partition wall 13 is disc-shaped with an outer diameter approximately the same as the inner diameter of the roll body 11, and is spaced apart in the longitudinal direction of the roll body 11, and is positioned to intersect the longitudinal direction (orthogonal in the illustrated example). Note that the angle of the partition walls 13 does not have to be strictly perpendicular to the longitudinal direction of the roll body 11; it is sufficient that they separate the adjacent compartments 12.
[0023] There are no particular restrictions on the spacing between the multiple partition walls 13, and they can be set appropriately depending on the number of partition walls to be installed. If the partition walls 13 are installed at equal or approximately equal intervals, the volume of each compartment 12 will be equal or approximately equal, and if they are installed at uneven intervals, the volume of each compartment 12 will be uneven.
[0024] When the partition walls 13 are installed at uneven intervals, the distance between the partition walls 13 forming the compartments 12 at both ends can be made narrower so that the volume of the compartments 12 at both ends is reduced, while the distance between the partition walls 13 forming the other compartments 12 can be made wider. The partition walls 13 may be fixed, but they can also be made movable to any position in the longitudinal direction of the roll body 11 so that the size of the compartments 12 can be changed according to the width of the sheet material X.
[0025] By doing so, the air ejection pressure (in other words, the air flow velocity or air discharge volume) in the compartments 12 at both ends becomes higher than in the other compartments 12, allowing for a stronger air ejection than in the other compartments 12. This makes it easier to lift the ends of the sheet material X in the width direction, which are prone to contact with the perforated conveying roll 10, and makes it easier to prevent the ends of the sheet material X in the width direction from contacting the perforated conveying roll 10.
[0026] The roll body 11 and the partition wall 13 can be made separate components, and the partition wall 13 can be inserted into the roll body 11 later. For example, the partition wall 13 can be formed integrally with the core member 16, and the partition wall 13, which is formed integrally with the core member 16, can be inserted into the hollow roll body 11.
[0027] The roll body 11 and partition wall 13 can be made of materials other than aluminum, such as stainless steel, resin, rubber, or FRP (fiber-reinforced plastic) which is a composite of carbon fiber, glass fiber, etc. The roll body 11 and partition wall 13 can also be made of these composite materials.
[0028] Each partition wall 13 is provided with an air inlet 13a for introducing air supplied from an air supply source 20 into the compartment 12. As shown in Figure 2, an air supply hose 21 of the air supply source 20 is inserted into each air inlet 13a, so that air supplied from the air supply source 20 is introduced into each compartment 12 via the air supply hose 21. In this embodiment, a compressor is used as the air supply source 20, but an air supply source other than a compressor can also be used as the air supply source 20.
[0029] Each air supply hose 21 is equipped with a pressure regulator 22, which allows for adjustment of the pressure within each compartment 12 into which the air supply hose 21 is introduced. In this embodiment, by introducing air supply hoses 21 into each compartment 12 and equipping each air supply hose 21 with a pressure regulator 22, the air ejection pressure from the vent holes 14 can be adjusted for each compartment 12.
[0030] Therefore, for example, the air ejection pressure in the compartments 12 at both ends where the sheet material X is subjected to stronger tension than other parts is located can be adjusted to be greater than the air ejection pressure in the other compartments 12. This makes it easier to lift the sheet material X at both ends in the width direction, which are prone to contact with the perforated conveying roll 10, and prevents the sheet material X at both ends in the width direction from coming into contact with the perforated conveying roll 10.
[0031] The perforated conveying roll 10 described so far is just one example, and the configuration of the perforated conveying roll 10 of this application is not limited to this embodiment. The perforated conveying roll 10 of this application includes, for example, the following various modifications.
[0032] -Experimental Variation 1- In the perforated conveying roll 10 of the above embodiment, the case in which the roll body 11 is cylindrical without steps is given as an example, but as shown in Figures 3(a) and 3(b), the roll body 11 can also be provided with a large-diameter section 11e that is one step higher than the other parts of the roll body 11. Conversely, the roll body 11 can also be provided with a small-diameter section (not shown) that is one step lower than the other parts of the roll body 11. Ventilation holes 14 may or may not be provided in the large-diameter section 11e or the small-diameter section.
[0033] The large-diameter sections 11e can be provided, for example, near both ends in the longitudinal direction of the roll body 11. In this case, ventilation holes 14 can be provided in the area excluding the two large-diameter sections 11e (the area inside the two large-diameter sections 11e), allowing air to be ejected from there.
[0034] When large-diameter sections 11e are provided near both ends in the longitudinal direction of the roll body 11, as shown in Figures 4(a) and 4(b), an air layer Y is formed in the space enclosed by the sheet material X and the inner end faces of both large-diameter sections 11e, where air ejected from the ventilation holes 14 accumulates. This air layer Y ensures a distance between the surface of the roll body 11 and the sheet material X. This prevents the ends of the sheet material X in the width direction, which are subjected to strong tension, from coming into contact with the surface of the roll body 11.
[0035] The large-diameter portion 11e is not required, but if it is provided, as shown in Figure 4(b), the large-diameter portion 11e prevents air from flowing through the air layer Y, making the air layer Y more stable and thus making it easier to obtain the above-mentioned effects.
[0036] Furthermore, when a large-diameter section 11e is provided on the roll body 11, the inner surface of the large-diameter section 11e is tapered as shown in Figure 5, making it easier for the sheet material X to ride up onto the upper side of the large-diameter section 11e when it moves laterally. This prevents wrinkles from forming due to the sheet material X getting caught on the large-diameter section 11e when it moves laterally.
[0037] -Variation 2- In the above embodiment, the case in which the surface of the roll body 11 is a smooth surface without irregularities is given as an example. However, as shown in Figure 6(a), the surface of the roll body 11 can also be provided with a textured surface 11d having recesses 11b and protrusions 11c, and a resistance member 18 and a fixing device 19 can be provided on its outer circumference. The textured surface 11d can be formed, for example, by blasting (e.g., sandblasting) the surface of the roll body 11.
[0038] There are no particular restrictions on the roughness or shape of the textured surface 11d, but an example of roughness when processed by blasting is Rq: approximately 0.5 to 4.0 μm. However, this value is just an example, and values outside this range are also acceptable.
[0039] Furthermore, if dents and irregularities are formed by blasting, abnormal protrusions on the surface may cause problems during transport. Therefore, it is desirable that the protrusions 11c have a uniform height and are free of abnormal protrusions. While there are no restrictions on the shape of the protrusions 11c, it is desirable that the area around the dents and irregularities be free of burrs and have a rounded shape.
[0040] -Variation 3- In the above embodiment, nothing is provided on the outer circumference of the roll body 11. However, as shown in Figure 6(b), a resistance member 18 can also be provided on the surface of the roll body 11 to increase the conductance (resistance) of the air passing through the ventilation holes 14. In addition to increasing the resistance of the air, the resistance member 18 also plays a role in diffusing the air throughout the roll body 11.
[0041] The resistive member 18 can be made of a material with fine pores, such as a nonwoven fabric, perforated film, perforated foil, or porous sheet (for example, a sintered sheet having a sintered structure). The resistive member 18 can be provided in all or part of the area of the roll body 11 where the ventilation holes 14 are provided.
[0042] To prevent contamination from the material, an amorphous film such as DLC, SiOx, SiC, or SiN may be applied to the surface or surface layer of the resistive member 18, or an aluminum-based metal film may be coated. Here, "surface" refers to the outer circumferential surface of the resistive member 18, and "surface layer" refers to the surface of the resistive member 18 and the region including the injected portion if injected inward from the surface.
[0043] When a resistance member 18 is provided on the outer circumference of the roll body 11, a fixing device 19 can be provided on the outer circumference of the resistance member 18 to prevent the resistance member 18 from inadvertently falling off the roll body 11. As the fixing device 19, a cylindrical mesh material that covers the outer circumference of the resistance member 18 or a band that holds a part of the outer circumference of the resistance member 18 can be used.
[0044] -Variation 4- In the above embodiment, one example is the case in which the air supply hose 21 is introduced to all compartments 12. However, it is also possible to introduce the air supply hose 21 to only some of the compartments 12, so that some of the compartments 12 do not have the air supply hose 21 installed.
[0045] For example, as shown in Figure 7(a), the compartments 12 at both ends in the longitudinal direction can be designated as compartments 12 into which the air supply hose 21 is introduced, while the compartments 12 adjacent to the compartments 12 at both ends can be designated as compartments 12 into which the air supply hose 21 is not introduced.
[0046] In this case, in order to ensure air supply to compartments 12 where the air supply hose 21 is not installed, an air passage 13b can be formed in the partition wall 13 between the compartment 12 where the air supply hose 21 is installed and the compartment 12 where the air supply hose 21 is not installed, so that the air supplied into the compartment 12 where the air supply hose 21 is installed passes through the air passage 13b and is supplied to the compartment 12 where the air supply hose 21 is not installed.
[0047] In this case, the air passage 13b can be a hole with a uniform inner diameter (a straight-shaped hole), but it can also be tapered towards the end of the airflow direction, specifically tapering from the side of the compartment 12 into which the air supply hose 21 is introduced to the side of the compartment 12 into which the air supply hose 21 is not introduced. The air passage 13b can also be a tapered shape that widens towards the end.
[0048] By making the air passage 13b tapered in this way, it is possible to reduce (limit) the amount of air flowing into the compartment 12 where the air supply hose 21 is not installed, while creating a difference in air discharge pressure (in other words, air flow velocity or air discharge volume) between the compartment 12 where the air supply hose 21 is installed and the compartment 12 where the air supply hose 21 is not installed.
[0049] In the illustrated example, the air ejection pressure in the compartments 12 at both ends where the air supply hose 21 is introduced becomes higher than the air ejection pressure in the other compartments 12 where the air supply hose 21 is not introduced. As a result, it becomes easier to lift the ends of the sheet material X in the width direction, which are prone to contact with the perforated conveying roll 10, and it becomes easier to prevent the ends of the sheet material X in the width direction from contacting the perforated conveying roll 10.
[0050] Furthermore, if an air passage 13b is provided in the partition wall 13, a resistive material (a member having conductance) 13c that suppresses the flow of air can be provided inside the air passage 13b, as shown in Figure 7(b). Various materials with fine pores through which air can pass can be used for the resistive material 13c, such as mesh material, nonwoven fabric, cotton, sintered bodies such as sintered carbon or sintered metal, and foamed materials such as resin or sponge.
[0051] In this case as well, the air ejection pressure in the compartments 12 at both ends where the air supply hose 21 is introduced becomes higher than the air ejection pressure in the other compartments 12, making it easier to lift the ends of the sheet material X in the width direction, which are prone to contact with the perforated conveying roll 10, and making it easier to prevent the ends of the sheet material X in the width direction from contacting the perforated conveying roll 10.
[0052] The modifications described herein are merely examples, and the perforated conveying roll 10 of the present invention is not limited to the above embodiments or modified configurations. For example, when a textured portion 11d is provided on the surface of the roll body 11, or when a resistance member 18 or the like is provided on the surface of the roll body 11, it is also possible to go beyond the scope of the embodiments and modified configurations described in this application, such as providing a large-diameter portion 11e or a small-diameter portion on the roll body 11 as in other embodiments, by rearranging the configuration.
[0053] (Embodiment of a sheet material manufacturing apparatus) Next, an example of an embodiment of the sheet material manufacturing apparatus 30 using the perforated conveying roll 10 of the above embodiment will be described with reference to the drawings. The sheet material manufacturing apparatus 30 is a device for manufacturing sheet materials X such as resin films and metal foils. Here, we will consider the case where the sheet material manufacturing apparatus 30 is a device for manufacturing functional films as an example.
[0054] In Figure 8, 31 is an extruder, 32 is a T-die, 33 is a cooling roll, 34 is a casting roll, 35 is a conveying roll, and 36 is a winding roll. In this sheet material manufacturing apparatus 30, the supplied resin pellets are heated and melted in the extruder 31 and supplied to the T-die 32, where they are formed into a sheet and discharged. The thickness of the film can be adjusted to the desired thickness by adjusting the discharge amount of molten resin, the take-up speed, and the opening of the lip (not shown) of the T-die 32.
[0055] The film discharged from the T-die 32 is cooled and solidified by the cooling roll 33, then its temperature is controlled by the casting roll 34, and it is stretched in the longitudinal and transverse directions while being conveyed forward by the conveyor roll 35 and wound onto the winding roll 36. In this embodiment, the perforated conveyor roll 10 shown in Figures 1(a) and 1(b) is used as the conveyor roll 35.
[0056] The configuration of this embodiment is an example, and the sheet material manufacturing apparatus 30 of the present invention is not limited to the configuration of this embodiment. The sheet material manufacturing apparatus 30 can be modified, replaced, or omitted in any way that does not change its essence.
[0057] (Embodiment of a sheet material processing apparatus) Next, an example of an embodiment of the sheet material processing apparatus 40 using the perforated conveying roll 10 of the above embodiment will be described with reference to the drawings. The sheet material processing apparatus 40 is an apparatus for processing sheet materials X such as resin films and metal foils. Processing here includes, for example, cutting a part of the sheet material X or applying a coating liquid such as a functional material to both sides or one side of the sheet material X.
[0058] As an example, the sheet material processing apparatus 40 shown in Figure 9 is a coating apparatus that applies a functional material to a sheet material X. In Figure 9, 41 is a feed roll, 42 is a winding roll, 43 is a conveying roll, 44 is an impression roll, 45 is a container for the coating liquid, 46 is a gravure roll, 47 is a touch roll, 48 is a blade, and 49 is a drying oven.
[0059] In this embodiment, the perforated conveying roll 10 shown in Figures 1(a) and 1(b) is used as the conveying roll 43. Specifically, the perforated conveying roll 10 shown in Figures 1(a) and 1(b) is used as the conveying roll 43 positioned between the feed roll 41 and the gravure roll 46, and as the conveying roll 43 positioned between the gravure roll 46 and the winding roll 42.
[0060] In this embodiment, the sheet material processing apparatus 40 is shown as a coating apparatus as an example, but the sheet material processing apparatus of the present invention includes various apparatuses that process the sheet material X while it is being transported, such as a cutting apparatus that cuts the sheet material X in the flow direction (MD direction) or width direction (TD direction) while it is being transported, a laminating apparatus that adheres another sheet material X to the sheet material X being transported and then winds it up, and a slitting apparatus that cuts the sheet material X to a desired width while winding it up while it is being transported.
[0061] Various devices that process sheet material X while transporting it, such as the cutting device, laminating device, and slitting device, are provided with transport rolls for transporting the sheet material X, and the perforated transport roll 10 of the present invention can be used as such transport rolls. The sheet material processing device 40 of the present invention also includes devices that can perform multiple processing operations, such as coating, laminating, and slitting, in a single unit.
[0062] The configuration of this embodiment is an example, and the sheet material processing apparatus 40 is not limited to the configuration of the embodiment described above. The sheet material processing apparatus 40 of the present invention can be modified as appropriate, such as by adding, replacing, or omitting components, to the extent that the intended purpose can be achieved.
[0063] The embodiments disclosed herein are illustrative and not intended to restrict the technical scope of the present invention. The technical scope of the present invention is defined by the claims. The technical scope of the present invention also includes equivalents to the claims. [Industrial applicability]
[0064] The perforated conveying roll 10 of the present invention can be used as a conveying roll mounted in various devices, and is particularly suitable for use as a conveying roll in a sheet material manufacturing device 30 or a sheet material processing device 40 that manufactures sheet materials X such as optical films and various metal foils. [Explanation of Symbols]
[0065] 10 Perforated conveying rolls 11 Roll body 11a opening 11b recess 11c protrusion 11d Pear-textured area 11e Large diameter section 12 compartments 13 Bulkhead 13a Air Inlet 13b Air vent 13c Resistive material 14 Ventilation holes 15 Lid material 16 Core members 18 Resistive member 19 Fixtures 20 Air supply source 21 Air supply hose 22 Pressure Regulator 30 Sheet material manufacturing equipment 31 Extruder 32 T-die 33 Cooling Roll 34 Casting Roll 35 Conveyor Rolls 36 reel rolls 40 Sheet material processing equipment 41 Feed Roll 42 Reel roll 43 Conveyor Rolls 44 Impression Cylinder Roll 45. Container for coating liquid 46 Gravure Roll 47 Touch Roll 48 blades 49 Drying oven X Sheet Material Y Air layer
Claims
1. In a perforated conveying roll equipped with ventilation holes on the circumferential surface of the roll body through which air passes, The interior of the roll body is divided into two or more compartments by partitions arranged in a direction intersecting the roll body. A perforated conveying roll characterized by the following features.
2. In the perforated conveying roll according to claim 1, Each compartment is connected to a ventilation hole on the circumferential surface of the roll body, and the air supplied to each compartment is ejected from the ventilation hole that communicates with that compartment. A perforated conveying roll characterized by the following features.
3. In the perforated conveying roll according to claim 1, Air supply hoses were installed in one or more compartments. A perforated conveying roll characterized by the following features.
4. In the perforated conveying roll according to claim 3, A pressure regulator was installed in the air supply hose introduced into the compartment. A perforated conveying roll characterized by the following features.
5. In the perforated conveying roll according to claim 3, It has a compartment in which no air supply hose is installed. In the partition wall constituting a compartment through which the aforementioned air supply hose is not installed, an air passage is provided for the air supplied to the adjacent compartment to pass through. A perforated conveying roll characterized by the following features.
6. In the perforated conveying roll according to claim 5, The air vents are either straight or tapered, narrowing or widening towards the front in the direction of airflow. A perforated conveying roll characterized by the following features.
7. In the perforated conveying roll according to claim 5, Air vents are provided with a resistive material to suppress airflow. A perforated conveying roll characterized by the following features.
8. In the perforated conveying roll according to claim 1, Partition walls are installed at equal or unequal intervals. A perforated conveying roll characterized by the following features.
9. In the perforated conveying roll according to claim 1, The ventilation holes are holes perpendicular to the longitudinal direction and / or circumferential direction of the roll body, and / or oblique holes. A perforated conveying roll characterized by the following features.
10. In the perforated conveying roll according to claim 1, The roll body has a large-diameter section at both ends in the longitudinal direction that is higher than the rest of the roll body, or a small-diameter section that is lower than the rest of the roll body. A perforated conveying roll characterized by the following features.
11. In a sheet material manufacturing apparatus equipped with conveyor rolls, The conveying roll is a perforated conveying roll according to any one of claims 1 to 10. A sheet material manufacturing apparatus characterized by the following features.
12. In a sheet material processing apparatus equipped with a conveying roll, The conveying roll is a perforated conveying roll according to any one of claims 1 to 10. A sheet material processing apparatus characterized by the following features.