JP5655569B2 - Roll device - Google Patents

Description

  The present invention relates to a roll apparatus, and more particularly to a roll apparatus in which the roll can be bent. Specifically, the present invention includes a process for producing plastic films, paper, and metal foil (hereinafter collectively referred to as a web unless otherwise specified), surface treatment such as coating and vapor deposition on these web base materials, and laminating. The process to be applied (hereinafter, in particular, in the manufacturing process for the purpose of preventing rolls installed in the manufacturing process (generally referred to as expander rolls) for the purpose of stretching the wrinkle of the web and for preventing the air from being taken in during winding of the web. Rolls (generally called touch rolls and contact rolls) installed on the web and within the manufacturing process for the purpose of sandwiching the web to give the web a driving force, tension cutting, or bonding multiple webs It relates to a roll device suitable for installed rolls (generally called nip rolls or pinch rolls). .

  Various rolls are arranged for various purposes in various web manufacturing processes and processes (hereinafter referred to as web processing processes) in which surface treatment such as coating and vapor deposition and laminating are performed on these web base materials. ing. Rolls used for normal transport purposes are generally straight, but are installed for the purpose of stretching the wrinkles of the web that occur during the transport process, and for the purpose of preventing the entrainment of ambient air during web winding. As a roll installed for the purpose of sandwiching a web and applying a driving force to the web, cutting a tension, or bonding a plurality of webs, the roll may be curved in a plane including a roll axis. Possible bending rolls may be used.

  As a mechanism for changing the curvature of roll bending, Patent Document 1 discloses a mechanism in which a roll mantle is installed on the surface of a bendable shaft via a bearing and the curvature of the roll mantle surface is changed by bending the shaft. Have been described. Patent Document 2 describes a mechanism that inserts a control shaft from both sides of a contact roll through bearings and changes the angle of the control shaft by pushing the end of the control shaft, thereby changing the curvature of the contact roll surface. ing. In Patent Document 3, a cylindrical outer cylinder member (roll shell), a ring member fixedly attached to the outer peripheral surface of the central axis, and a ring member fixedly attached to the inner peripheral surface of the outer cylindrical member at the center of the roll. The members are fastened with bolts, and the curvature of the surface of the outer cylinder member is changed by changing the relative positions of the bearings installed outside and inside the mechanism by a variable spacer mechanism at a plurality of circumferential positions provided at both ends of the inside of the roll. The mechanism is described.

Special table 2006-527335 JP 5-178505 A JP2007-1113688

  In recent years, for example, the film width has reached 9 m in the film production line and the paper width has reached 10 m in the paper production line, and the roll surface length has been increased accordingly. In addition, it is required to produce a variety of products on the same production line, and to adjust the curvature of the roll surface with high frequency.

  The bending roll of Patent Document 1 increases bearing resistance because the bearing rotates on a curved shaft, gives excessive tension to the film, shortens the bearing life, and requires frequent maintenance. There was a problem that. In addition, vibration is likely to occur at high speed rotation. Further, with the increase in the length of the roll, parts such as a frame and an adjusting screw for curving the shaft are increased in size, and a powerful force is required, which is difficult to realize.

  In the bending roll of patent document 2, since it is necessary to bend the whole roll by the control shaft inserted from the both ends of a roll, in order to change the curvature of a roll surface, a special large-sized installation, powerful force, and the strong power which supports it Necessitating a new member.

  In the bending roll of Patent Document 3, a mechanism for changing the curvature of the roll surface is installed inside the roll, and in order to change the curvature of the roll surface, it is necessary to temporarily stop the rotation of the roll. The curvature of the roll surface could not be changed. Further, in order to adjust the curvature, it is necessary to adjust the variable spacer mechanisms at a plurality of locations in the circumferential direction, and it is estimated that advanced techniques are required for adjusting the roll surface curvature.

  The object of the present invention is to cope with everything from a short roll having a surface length of about 1 m to a roll having a surface length of 10 m or more, and easily changing the curvature of the roll surface easily, simply and quickly even during operation. It is in providing the roll apparatus which can be performed.

The roll device of the present invention (Claim 1) includes a cylindrical roll shell, a roll shaft disposed coaxially with the roll shell in the roll shell, and an intermediate portion in the longitudinal direction of the roll shell and the roll shaft. A connecting member interposed between the roll shell and the roll shaft, shaft shaft supports provided at both ends of the roll shaft, and a shaft housing for supporting the shaft shaft support via a shaft bearing A shell shaft support provided at each end of the roll shell, and a slide housing that supports the shell shaft support via a shell bearing and is movable in a direction orthogonal to the roll axis. Advancing and retreating to adjust the bending amount of the roll shell by advancing and retracting the slide housing in the direction perpendicular to the axial center line direction of the roll A roll apparatus comprising a location, the tether, the a roll shell and roll shaft and coaxial connecting pipe, the outer peripheral surface of the connecting pipe is bonded to the inner peripheral surface of the roll shell, the joint The inner peripheral surface of the pipe is bonded to the outer peripheral surface of the roll shaft, the roll shaft, the roll shell and the connecting pipe are made of carbon fiber reinforced synthetic resin, and the Young's modulus of the carbon fiber reinforced synthetic resin constituting the roll shell is The Young's modulus of the carbon fiber reinforced synthetic resin constituting the roll shaft is 60 to 160 GPa, and the Young's modulus of the carbon fiber reinforced synthetic resin constituting the roll shell is 100 to 400 GPa. is there.

  The roll device according to a second aspect is the roll device according to the first aspect, wherein the advance / retreat device includes an adjuster bolt for pushing and moving the slide housing in the advance / retreat direction, and the adjuster bolt sandwiches the shell shaft support body. It is characterized by being arranged on both sides.

  A roll device according to a third aspect is the roll device according to the second aspect, wherein a bracket is extended from the slide housing, the adjuster bolt is screwed to the bracket, and a tip of the adjuster bolt is in contact with the shaft housing. It is characterized by this.

  A roll device according to a fourth aspect is characterized in that, in the first aspect, the advance / retreat device is a cylinder device.

The roll device according to claim 5 is capable of decentering the roll shell axis from the roll shaft axis by an amount calculated by the following formula at the maximum in any one of claims 1 to 4. It is characterized by being.
Maximum eccentricity [mm] = surface length [mm] ÷ 500

  In the roll apparatus of the present invention, a roll shaft is coaxially arranged in a roll shell, and a connecting member is interposed in an intermediate portion in the longitudinal direction. A shell shaft support and a shaft shaft support are attached to both ends of the roll shell and the roll shaft, respectively. The shell shaft support is supported by the slide housing via the shell bearing, and the shaft support supports the shaft bearing. Via the shaft housing.

  The slide housing that supports the roll shell is slidable in a direction orthogonal to the axis of the roll. The slide housing is advanced and retracted in this direction by an advance / retreat device, so that the roll shell is bent and the slide housing is moved. By adjusting the amount, the bending amount of the roll shell can be adjusted. In the present invention, the bending amount can be adjusted by moving the slide housing forward and backward even when the roll is rotating.

  The roll device of the present invention can adjust the curvature of the roll surface more simply, easily and quickly than the conventional bending rolls by adjusting only the advancing and retracting devices installed at both ends of the roll, and is as short as about 1 m. For example, it can deal with everything from a roll to a long roll having a surface length of 10 m, for example. For example, rolls installed for the purpose of extending the wrinkles of the web generated during various web manufacturing processes and transport processes installed in the web processing process, and installed for the purpose of preventing the surrounding air from being caught during web winding. By adopting rolls and rolls installed for the purpose of sandwiching webs and applying driving force to webs, tension cutting, or bonding multiple webs, higher quality than conventional (wrinkle reduction, It is possible to produce web products with low air entrainment, few scratches, etc.) with high productivity (high speed, wide width, high yield). By adjusting the curvature of the roll surface to an appropriate amount within each operating condition, uniform tension and contact pressure can be applied to the entire width of the web in contact with the roll.

  By adopting the adjuster bolt as the advance / retreat apparatus, the slide housing can be easily slid, and the sliding amount of the slide housing can be easily finely adjusted to finely adjust the bending amount.

  When this adjuster bolt is screwed to the bracket extended from the slide housing and the tip of the adjuster bolt is brought into contact with the shaft housing, the adjuster bolt rotates to obtain a reaction force from the shaft housing. The slide housing moves forward and backward.

  The advance / retreat apparatus is not limited to an adjuster bolt, and may be a cylinder apparatus such as a pneumatic cylinder apparatus.

  A connecting pipe is suitable as the connecting member. By making the roll shell, the roll shaft, and the connecting member made of a carbon fiber reinforced synthetic resin, the weight of the roll is reduced.

  In the present invention, the axial center of both ends of the roll shell can be decentered from the roll shaft axis by 0 mm to the maximum eccentricity expressed by the following formula 1, that is, the curvature of the roll surface is set to 0. It is desirable that it can be changed by an amount represented by the following formula 2 at maximum.

Maximum eccentricity [mm] = surface length [mm] ÷ 500
Curvature [−] = Roll center outer diameter [mm] / (Roll both end outer diameter [mm] −Actual eccentricity [mm]) Equation 2

It is a schematic horizontal sectional view of the roll device according to the embodiment. It is a typical horizontal sectional view which shows the bending state of a roll shell. It is a detailed longitudinal cross-sectional view of the roll apparatus which concerns on embodiment. It is a top view of the roll apparatus which concerns on embodiment. It is a left view of the roll apparatus which concerns on embodiment. It is a schematic horizontal sectional view of a roll device according to another embodiment.

  Hereinafter, a roll apparatus according to an embodiment will be described with reference to the drawings. FIG. 1 is a schematic horizontal sectional view of a roll device according to an embodiment, and FIG. 2 is a schematic horizontal sectional view showing a bending state of a roll shell.

  First, the overall configuration of the roll apparatus will be described with reference to FIGS.

  The roll 12 of the roll apparatus 10 includes a coaxial roll shaft 14 and a roll shell 16, and a connecting pipe 18 that connects them. A middle portion in the longitudinal direction of the roll shaft 14 and the roll shell 16 is connected by a connecting pipe 18. The inner peripheral surface of the connecting pipe 18 is fixed to the outer peripheral surface of the roll shaft 14, and the outer peripheral surface is fixed to the inner peripheral surface of the roll shell 16.

  Shaft shaft supports 20 are attached to both ends of the roll shaft 14. 1 is provided with a driving device connecting portion 20a to which a driving device (not shown) including a motor and a reduction gear is connected. The shaft support 20 is supported by a base plate 26 (not shown in FIG. 1; see FIGS. 3 to 5) via a shaft bearing 22 and a shaft housing 24. The shaft housing 24 surrounds the outer periphery of the shaft shaft support 20 and the bearing 22, and is fixed to the base plate 26.

  Shell shaft supports 28 are attached to both ends of the roll shell 16, and the shell shaft supports 28 are supported by the base plate 26 via shell bearings 30 and a slide housing 32. The slide housing 32 surrounds the outer periphery of the shell shaft support 28 and the bearing 30. The slide housing 32 is attached to the base plate 26 so as to be slidable in a direction perpendicular to the axis of the roll 12 (vertical direction in FIG. 1, vertical direction to the paper in FIG. 3, and horizontal direction in FIG. 5). .

  Brackets 34 project from both sides of the slide housing 32 across the shell shaft support 28, and adjuster bolts 36 are screwed into female screw holes 34 a provided in the bracket 34. The brackets 34 and 34 are provided on the opposite side and at the same height with the shell shaft support 28 interposed therebetween.

  The adjuster bolts 36 and 36 are positioned on a horizontal straight line, and the tips of the adjuster bolts 36 and 36 are in contact with the side surface of the shaft housing 24. A lock nut 38 is screwed to each adjuster bolt 36.

  Among the adjuster bolts 36, the left adjuster bolts 36a and 36b in FIG. 5 are turned to move the left bracket 34 toward the shaft housing 24 (to the right in FIG. 5), and the right adjuster in FIG. When the bolts 36c and 36d are turned to move the right bracket 34 to the right, the slide housings 32 and 32 move downward in FIG. 1 (to the right in FIG. 5). In the central portion of the roll shell 16 in the longitudinal direction, a connecting pipe 18 exists between the roll shell 16 and the roll shaft 14. In other cases, a gap is formed between the roll shell 16 and the roll shaft 14. Therefore, by moving the slide housings 32, 32 downward in FIG. 1, the roll shell 16 is bent (bending) so as to protrude upward in FIG. To do. When the slide housings 32, 32 are moved in the opposite direction, the roll shell 16 is curved so as to protrude downward in FIG.

  In this embodiment, the adjuster bolt 36 is located outside the housings 24 and 32, and even when the roll 12 is rotating, the adjuster bolt 36 is rotated to move the slide housings 32 and 32, and the roll shell 16 is moved. The curvature of curvature can be adjusted.

  Of course, when the adjuster bolt 36 is turned, the lock nut 38 is loosened as necessary, and the lock nut 38 is tightened after the adjustment of the curvature of the roll shell 16 is completed.

  Next, the detailed configuration of this roll apparatus will be described with reference to FIGS.

  The shaft shaft support 20 includes a short substantially cylindrical shaft body mounting boss 40 fitted and fixed to both ends of the roll shaft 14, and a shaft body 42 connected to the boss 40 by a bolt.

  The shaft body 42 includes a base shaft portion and a flange portion that expands from one end of the base shaft portion, and the shaft body mounting boss 40 is connected to the outer peripheral edge portion of the flange portion by a bolt.

  In the left shaft main body 42 in FIGS. 1, 3 and 4 of the roll 12, the drive device connecting portion 20a is provided at the other end of the base shaft portion.

  The shell shaft support 28 includes a short substantially cylindrical collar mounting boss 44 fitted and fixed to both ends of the roll shell 16, and a collar 46 connected to the boss 44 by a bolt. The collar 46 has a cylindrical base shaft portion and a flange portion that expands from one end side of the base shaft portion, and the outer peripheral edge portion of the flange portion is fixed to the collar mounting boss 44 by bolts. . The base shaft portion of the shaft main body 42 is inserted into the inner hole of the cylindrical base shaft portion of the collar 46. A predetermined gap is provided between the outer peripheral surface of the base shaft portion of the shaft body 42 and the inner peripheral surface of the base shaft portion of the collar 46. The shaft body 42 extends outward through the inner hole of the collar 46.

  A base shaft portion of the shaft body 42 is supported by the shaft housing 24 via the bearing 22. A mounting seat portion 24 a protruding from the lower portion of the shaft housing 24 is fixed to the base plate 26 by bolts 50.

  A base shaft portion of the collar 46 is supported by the slide housing 32 via the bearing 30. The slide housing 32 is engaged with a key groove 52 (FIG. 3) provided in the base plate 26 via a key 54. The key groove 52 extends in a direction orthogonal to the axial center line of the roll 12. The slide housing 32 is fixed to the base plate 26 by a bolt 56 with a mounting seat portion 32 a protruding from the lower portion thereof. By loosening the bolt 56, the slide housing 32 can slide along the key groove 52, and by tightening the bolt 56, the slide housing 32 is fixed to the base plate 26.

  The shaft housing 24 is provided with an overhanging portion 24b that projects upward from the slide housing 32.

  Hereinafter, advantages of the roll device 10, suitable constituent materials, dimensions, and other aspects will be described.

  In the roll apparatus 10 according to this embodiment, the roll shaft 14 and the roll shell 16 are fastened with bolts in the inner part of the roll apparatus 10 by adhesively joining the roll shaft 14 and the roll shell 16 via the connecting pipe 18. Such complicated work becomes unnecessary. In addition, since roll surface curvature variable mechanisms (advance / retreat devices) are provided at both ends of the roll shell 16, there is no need for complicated operations such as once removing the roll from the device when the roll surface curvature is changed. It is possible to adjust the radius of curvature of the roll surface.

  The length of the connecting pipe 18 is not particularly limited because it is set for each roll use condition. Usually, the length is in the range of 1/25 to 1 / 1.1 of the roll shell surface length, preferably 1/20. It is 1/2, more preferably 1/20 to 1/3. If the length is shorter than 1/25 of the roll surface length, it is considered that the total pressure hitting the roll surface concentrates on the portion and causes damage. If the roll surface length is longer than 1 / 1.1, the effect of the roll surface curvature varying mechanism at the end of the roll may be reduced. Also, the position of the connecting pipe 18 is not particularly limited since it is set for each roll use condition, but it is usually preferable that the connecting pipe center be arranged symmetrically in the center of the roll axis direction. Two connecting pipes may be installed in a symmetrical position in the center of the roll shaft without connecting pipes. Moreover, when using this roll for the purpose of bending the roll surface asymmetrically, the position of the connecting pipe may be shifted from the centrally symmetric position according to the design.

The roll of the present invention is preferably configured so that the axial centers of both end portions of the roll shell 16 can be eccentric with respect to the axial center of the roll shaft 14 by the amount calculated by the following Equation 1.
Maximum eccentricity [mm] = surface length [mm] ÷ 500

In the present invention, it is possible to adjust the radius of curvature of the roll surface simply, easily and quickly by adopting an advance / retreat device that can decenter the axis of both ends of the roll shell with respect to the roll shaft axis. is there. As for the maximum eccentricity, the larger the variable range, the better in terms of roll performance, which is preferable. For this purpose, it is necessary to increase the distance between the roll shell and the roll shaft, and a strong force is required to make the eccentricity. Is required. Therefore, the maximum amount of eccentricity is sufficient if it is the amount calculated by Equation 1, and is preferably the amount calculated by the following Equation 3 in consideration of roll production and practical use.
Maximum eccentricity [mm] = surface length [mm] ÷ 800

  The advance / retreat apparatus employed as the roll surface curvature variable mechanism of the roll of the present invention is configured such that the bearings attached to the collar portions of the roll shell end portions are eccentric with respect to the bearings that rotate the roll shaft, thereby The center is eccentric with respect to the roll shaft axis.

  By decentering the bearing 30 attached to the collar portion at the end of the roll shell by the advance / retreat apparatus with respect to the roll shaft axis, the roll shaft and the roll shell are integrated with each other via a connecting pipe. A bending force acts on the roll shell, and the roll surface can be bent, that is, a curvature can be given.

  The mechanism of the advancing / retreating device is not particularly limited because it is set in consideration of the roll use conditions, the surrounding environment, etc. For example, a pneumatic cylinder device by fitting a ring to the outer ring of the bearing attached to the collar portion of the end of the roll shell Alternatively, there are a mechanism for pressing with a cylinder device such as a hydraulic cylinder device, and a mechanism for adjusting the amount of eccentricity by moving the entire housing of the bearing with a positioning bolt. In the above embodiment, the latter is adopted and the adjuster bolt 36 is used as the positioning bolt.

  FIG. 6 is a schematic horizontal sectional view of the roll device according to the embodiment using the pneumatic cylinder device 70 as the advancing / retreating device, and shows the sectional configuration of the same part as in FIG.

  In this embodiment, the bracket 34 and the adjuster bolt 36 of the slide housing 32 are omitted, and the slide housing 32 is advanced and retracted by the pneumatic cylinder device 70 instead. The pneumatic cylinder device 70 includes a cylinder 72, a piston 74 in the cylinder 72, and a piston rod 76 that continues to the piston 74. The cylinder 72 is fixed to the base plate 26 (not shown in FIG. 6). The tip of the piston rod 76 is connected to the side surface of the slide housing 32 via an attachment 78. The pneumatic cylinder device 70 is of a backward motion type, and the piston rod 76 advances by applying air pressure to the head end side in the cylinder 72, and the piston rod 76 by applying air pressure to the rod end side in the cylinder 72. Retreats. The bending amount of the roll shell 16 can be adjusted by projecting or retracting the piston rod 76 in this way. The slide housing 32 may be configured by a ring fitted to the outer ring of the shell bearing 30.

  The roll shell is preferably made of carbon fiber reinforced plastic (Cabon Fiber Reinforced Plastics: CFRP, hereinafter referred to as CFRP).

  CFRP can control the Young's modulus from a low Young's modulus lower than the Young's modulus 69 GPa of metal aluminum to a higher Young's modulus higher than 206 GPa of iron by controlling the type of carbon fiber used and the lamination direction.

  If the roll shell 16 is made of metal, the weight increases and the entire roll becomes heavy, and the deflection of the roll shell 16 increases, which affects the curvature of the roll shell and makes it difficult to adjust the curvature. However, it is preferable to make the roll shell 16 lightweight CFRP because these problems can be improved. If the roll shell 16 made of CFRP and the metal collar mounting boss 44 are fastened and integrated with bolts or the like, a damage accident is likely to occur due to stress concentration during use. Therefore, the boss 44 is preferably bonded to the roll 16.

  The CFRP constituting the roll shell 16 preferably has a Young's modulus in the range of 60 to 160 GPa, particularly 60 to 100 GPa. By configuring the roll shell 16 with CFRP having a small Young's modulus in this way, the force required for bending the roll shell 16 is small. Note that if the Young's modulus is lower than 60 GPa, the self-weight deflection increases and curvature adjustment may be difficult. On the other hand, if the Young's modulus is higher than 160 GPa, the force required to give curvature to the roll surface may be excessive.

  The roll shaft 14 is also made of CFRP, and preferably has a structure in which a metal shaft mounting boss 40 is bonded and integrated thereto, and a metal shaft body 42 is connected to the boss 40.

  If the roll shaft 14 is made of metal, the weight increases and the entire roll becomes heavy. In addition, there is a concern that the deflection of the roll shaft will increase and the deflection of the entire roll will increase, and the bearing load that supports the roll shaft will increase and the life will be shortened. Therefore, these problems can be improved. It should be noted that a structure in which the CFRP roll shaft 14 and the metal shaft mounting boss 40 are integrated by fastening with bolts or the like is not preferable because a damage accident is likely to occur due to stress concentration during use. . When the metal shaft mounting boss 40 is bonded to the roll shaft 14, the shaft body 42 is preferably fastened to the shaft mounting boss 40 using bolts or the like.

  At both ends of the roll shaft 14, a reaction force is generated when the roll shell is bent by applying a force to the collar portion at the end of the roll shell. If the Young's modulus of the roll shaft 14 is low, the roll shaft 14 is bent when the roll shell 16 is bent, which is not preferable. Therefore, the Young's modulus of the CFRP constituting the roll shaft 14 is larger than the Young's modulus of the CFRP of the roll shell 14, and is preferably 100 to 400 GPa, particularly 160 to 400 GPa, particularly 240 to 400 GPa. When the Young's modulus is lower than 100 GPa, the deflection of the roll shaft is increased, which makes it difficult to adjust the curvature. Further, if the Young's modulus is higher than 400 GPa, it is preferable in terms of design, but it is not realistic because the grade of carbon fiber used becomes high and becomes very expensive.

  The connecting pipe 18 that connects the roll shell 14 and the roll shaft 16 is also preferably made of CFRP. In this case, it is preferable that the roll shell 16 is bonded to the outer peripheral surface of the connecting pipe 18 and the roll shaft 14 is bonded and bonded to the inner peripheral surface to be integrated. A structure in which the connecting pipe, the roll shell, and the roll shaft are integrated by fastening with bolts or the like is not preferable because a damage accident is likely to occur due to stress concentration during use.

  If the connecting pipe is made of metal, a heavy connecting pipe is installed in the center of the roll near the roll center, which may cause the entire roll to become heavy and increase the self-deflection of the roll shaft. However, these problems can be improved by making the connecting pipe made of lightweight CFRP.

[Example 1]
Carbon fiber prepregs HyEJ34M65PDHX1, HyEJ17HX1, and HyEJ25HX1 manufactured by Mitsubishi Plastics were used to produce three types of CFRP pipes for roll shells, roll shafts, and connecting pipes by the sheet winding method. The Young's modulus of the CFRP pipe was 80 GPa for the roll shell, 240 GPa for the roll shaft, and 210 GPa for the tether pipe.

  After the length of each CFRP pipe was determined and the outer diameter was roughly polished, the outer peripheral surface of the connecting pipe 18 was first bonded to the inner surface of the roll shell 16 and the central portion in the axial direction. One length of the connecting pipe 18 is 300 mm, and the length of the connecting pipe with respect to the roll surface length of 2700 mm is 300/2700 = 11.1%, which is about 1/9 of the surface length. Next, S45C collar attachment bosses 44 were bonded to both ends of the roll shell 16, and S45C collars 46 were fastened thereto by bolt joining. After the entire surface was polished to obtain accuracy, a rubber lining (NBR, hardness JIS 70 °) was applied to the surface of the roll shell 16, and further polished on the basis of a metal collar 46 to obtain accuracy of the roll surface.

  Regarding the roll shaft 14, first, S45C shaft mounting bosses 40 were bonded to both ends of the roll shaft 14, and the S45C shaft main body 42 was fastened thereto with bolts. Next, the entire roll shaft was polished to obtain accuracy. Thereafter, the roll shaft 14 was inserted into the roll shell 16 from which the S45C collar 46 was removed, and the inner peripheral surface of the connecting pipe 18 was bonded to the outer surface of the roll shaft 14 and the central portion in the axial direction. Finally, the S45C collar 46 was fastened again to the S45C collar mounting boss 44 with bolts, and all of them were integrated.

  A roll shell bearing 30 was attached to the collar 46 and set in the slide housing 32. Next, the roll shaft 14 was set in the shaft housing 24, and the roll shaft bearing 22 was incorporated in the shaft main body 42. Subsequently, the slide housing 32 and the shaft housing 24 were placed on the base plate 12 and connected by bolts 50 and 56.

  When the curvature of the roll surface was changed by turning the adjuster bolt 36 and sliding the slide housings 32, the bearing 30 could be offset by 3 mm at maximum with respect to the bearing 22. This was in the range of the maximum amount of eccentricity obtained by calculation for a roll having a surface length of 2700 mm: 2700 mm / 500 = 5.4 mm. Further, the curvature with respect to the roll surface length was 210 mm / outer diameter (end diameter 210 mm−3 mm) = 1.01.

  The finished roll of φ210 mm × surface length of 2700 mm was rotated up to a maximum of 1819 rpm (1200 m / min) with the roll surface being bent by the adjuster bolt 36 to the maximum amount (eccentricity of 3 mm). It was as small as 0.03 mm and very good.

  This roll is set as a contact roll of a slitter of PET film, and the film roll is rolled while changing the film width (this film roll is, for example, a lump of film wound on a paper tube. And a roll that contacts the take-up film or transports the film). As a result, by setting the optimal roll curvature, it was possible to obtain a good wound film roll that was tightly wound with air intrusion suppressed in all widths from 1000 mm to 2400 mm.

[Comparative Example 1]
As a comparative example, a straight type contact roll having the same size and the same surface rubber specification was used when winding up to a width of 2400 mm. With this straight type roll, there was air intrusion into the take-up film due to the low contact pressure due to the deflection of the roll at the center of the film, and a good take-up film roll could not be obtained.

DESCRIPTION OF SYMBOLS 10 Roll apparatus 12 Roll 14 Roll shaft 16 Roll shell 18 Connecting pipe 20 Shaft support 22 Shaft bearing 24 Shaft housing 26 Base plate 28 Shell support 30 Shell bearing 32 Slide housing 34 Bracket 36 Adjuster bolt 38 Lock nut 40 Boss 42 Shaft body 44 Boss 46 Brim 70 Cylinder device 76 Piston rod

Claims (5)

A cylindrical roll shell;
A roll shaft disposed coaxially with the roll shell in the roll shell;
A connecting member interposed between the roll shell and the roll shaft at an intermediate portion in the longitudinal direction of the roll shell and the roll shaft;
Shaft support bodies provided at both ends of the roll shaft,
A shaft housing for supporting the shaft support through a shaft bearing;
Shell shaft supports respectively provided at both ends of the roll shell;
A slide housing that supports the shell shaft support through a shell bearing and is movable in a direction orthogonal to the axis of the roll;
A roll device comprising an advance / retreat device for adjusting the bending amount of the roll shell by advancing and retreating the slide housing in a direction perpendicular to the axial direction of the roll ,
The connecting member is a connecting pipe coaxial with the roll shell and the roll shaft,
The outer peripheral surface of the connecting pipe is bonded to the inner peripheral surface of the roll shell, and the inner peripheral surface of the connecting pipe is bonded to the outer peripheral surface of the roll shaft,
The roll shaft, roll shell and connecting pipe are made of carbon fiber reinforced synthetic resin,
The Young's modulus of the carbon fiber reinforced synthetic resin constituting the roll shell is 60 to 160 GPa,
A roll apparatus, wherein the Young's modulus of the carbon fiber reinforced synthetic resin constituting the roll shaft is greater than the Young's modulus of the carbon fiber reinforced synthetic resin constituting the roll shell, and is 100 to 400 GPa. In Claim 1, the advancing / retreating device includes an adjuster bolt for pushing and moving the slide housing in the advancing / retreating direction,
The roll device according to claim 1, wherein the adjuster bolts are arranged on both sides of the shell shaft support. In Claim 2, the bracket is extended from the slide housing,
The roll device according to claim 1, wherein the adjuster bolt is screwed to the bracket, and a tip of the adjuster bolt is in contact with the shaft housing.   2. The roll apparatus according to claim 1, wherein the advance / retreat apparatus is a cylinder apparatus. In any one of claims 1 to 4, an amount calculated by the following equation at maximum roll shell axis with respect to the roll shaft axis, characterized in that it is possible to decenter Roll device.
Maximum eccentricity [mm] = surface length [mm] ÷ 500

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