Roll-out apparatus for corrugating roller

Abstract: A roll unit (14) includes at its one axial end first means (25) for supporting and moving the roll unit on a floor and at its other axial end second means (26) for supporting and moving the roll unit (14) on the floor. The first supporting and moving means (25) movably supports the roll unit (14) against a first floor, while the second supporting and moving means (26) movably supports the roll unit (14) against a second floor, the level of which is different from that of the first floor. The second supporting and moving means (26) includes an auxiliary means for movably supporting the roll unit (14) against the first floor which auxiliary means is disposed at a predetermined position between the first (25) and second (26) supporting and moving means along the axial direction. The roll unit (14) further comprises means for selecting from between the auxiliary means and the second supporting and moving means (26) the means which cooperates with the first supporting and moving means (25) to movably support the roll unit (14), the selection being made by changing the level of the auxiliary means relative to the second supporting and moving means (26).

Description: BACKGROUND OF THE INVENTION The present invention relates to a roll-out apparatus for corrugating rollers of a corrugation device. More specifically, the present invention relates to a roll-out apparatus for corrugating rollers used in single facers that produce single-faced corrugated fiberboard. A liner is adhered to a corrugated core paper passed between a pair of corrugating rollers, each roller having corrugations formed on its outer perimeter surface. A conventional single facer creates single-faced corrugated cardboard in which a liner is adhered at the peaks of the waveform pattern formed on a corrugated core paper. A first corrugating roller and a second corrugating roller have wave form corrugations on their outer perimeter surfaces. The corrugating rollers are vertically rotatably disposed such that the corrugations mesh with each other. A press roller presses against the second roller. The core paper and the liner are interposed between the second roller and the press roller. The core paper is fed between the first corrugating roller and the second corrugating roller to form flutes in a prescribed manner. A starch-based adhesive is applied to the peaks of the waveform pattern by an adhesive application roller disposed on an adhesive application mechanism. A liner is fed to the opposite side of the core paper via a press roller. This liner is interposed between the press roller and the second corrugating roller so that it is pressed aganist the peaks of the core paper, thus forming a single-face corrugated fiberboard. In the conventional single facer described above, the corrugating roller must be replaced periodically due to wear on the waveform flutes over time. Also, the corrugating rollers having the same type of waveform flutes are replaced with corrugating rollers having different types of waveform flutes when an order is placed for different types of single-face corrugated fiberboard. Due to restrictions imposed by the mechanisms of the device, replacing the corrugating rollers is extremely complicated and time-consuming when performed within the device. Thus, structures in which the corrugating rollers are pulled out from the main device unit using a roll-out apparatus have been proposed to allow the corrugating rollers to be replaced outside the device. In the conventional roll-out apparatus described above, the corrugating rollers are disposed inside the main device unit, which includes various preheaters, adhesive application mechanisms, and the like. The movable sections of the corrugating rollers are connected to a carriage that moves the rollers in and out of the main unit. A frame projects from the carriage and the two corrugating rollers are rotatably disposed on this frame to form a modular unit. To replace the corrugating rollers, the rollers are brought out from the device by pulling out the carriage. This makes it possible to replace the corrugating rollers in a short period of time outside of the device so that the other mechanisms do not obstruct the process for producing fiberboard. After replacing the corrugating rollers, the carriage is moved back into its operational position to restore the corrugating rollers back inside the device. However, when installing the conventional single facer described above in a plant, it is not possible to directly install the single facer on the plant floor because vibrations and the like prevent the accurate operation of the single facer. Moreover, installing the single facer so that it is level is difficult. For this reason, a machine base is generally installed on the floor of the plant. The single facer is then installed on this machine base. However, since this results in a prescribed offset between the plant floor and the machine base, it is difficult to provide a roll-out apparatus as described above wherein a movable carriage is disposed to allow replacement of corrugating rollers. The use of a carriage requires the upper surface of the machine base to be at the same level as the floor of the plant. Major construction work would be required to modify the floor so that the base of this floor is at the same level as that of the machine base, thus increasing the costs involved in installing the single facer. Another major difficulty that has been discovered is that when the single facer itself is to be replaced, more construction work is required to modify the floor of the plant if the specifications of the new single facer are different from the single facer being replaced. An air-flotation method has been proposed where high-pressure air is blown up from a bottom surface of the unit containing the corrugating rollers. The force of the high-pressure air makes the unit movable, With this method, the unit can be moved even if there is an offset between the plant floor and the machine base. This air-flotation method, however, requires accessory equipment such as a high-pressure air source, making the device larger and increasing production costs. Document EP-A-0 439035, on which the preamble of claim 1 is based discloses a corrugated roll unit exchanging apparatus having driven wheels adapted to roll along a pair of parallel rail tracks. SUMMARY OF THE INVENTION It is an object of the present invention to provide a roll-out apparatus for corrugating rollers in a single facer device which overcomes the foregoing problems. It is a further object of the present invention to provide an inexpensive roll-out apparatus for corrugating rollers in a single facer device that does not require construction work to modify a floor or the like, It is another object of the present invention to provide an inexpensive roll-out apparatus for corrugating rollers in a single facer device which allows a corrugating roller unit to be moved smoothly between a first reference plane and a second reference plane, between which exists a prescribed offset. These and other objects are achieved according to the present invention in one aspect thereof by the features of claim 1. It is preferred that said roll unit further includes means for keeping said auxiliary means off of said second floor when said roll unit is moved from said first floor to said second floor the level of which is higher than that of said first floor. It is also preferred that said selecting means includes means for swinging said auxiliary means relative to said roll unit about the direction which is substantially perpendicular to the axial direction of the roll, means for locking said auxiliary means at a predetermined swing position, and means for automatically unlocking said auxiliary means at the predetermined swing position by utilizing a stepped portion between the first and second floors when said roll unit is moved between the first and the second floors. It is also preferred that said auxiliary means includes a swingable holder suspended from the roll unit, said locking means includes a first link one end of which is pivotably mounted on said roll unit so that said link is rotated about the one end between an engaging position where the other end engages an outer edge of said holder and a disengaging position, said unlocking means includes a second link one end of which is pivotably mounted on said roll unit and the other end of which is connected to said first link in such a way that the second link can be rotated about the one end so as to rotate said first link, said second link includes a follower for pivoting said second link clue to the follower's movement which follows said stepped portion to pivot said first link between said engaging position and said disengaging position. It is also preferred that said selecting means includes driving means for moving said auxiliary means up and down relative to said roll unit. The above, and other objects, features and advantages of the present invention will become apparent from the following description read in conjunction with the accompanying drawings, in which like reference numerals designate the same elements. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front-view of a single-facer according to an embodiment of the present invention. Fig. 2 is a side-view drawing of a corrugating roller unit, including a corrugating roller roll-out apparatus, of the single facer of Fig. 1. Fig. 3 is a side-view drawing of the first moving support means and the second moving support means of the single facer of Fig. 1. Figs. 4(a) and 4(b) are partial cross-sectional drawings describing the operation of the first moving support means. Figs. 5(a) and 5(b) are plan drawings of the second moving support means. Fig. 6 shows the relationship between the first moving support means and the positioning means. Figs. 7(a) and 7(b) describe the operation of the third moving support means of the single facer of Fig. 1. Figs. 8(a), 8(b), and 8(c) describe the steps involved as the second moving support means and the positioning means move the corrugating roller unit between the active section and the roll-out section. Fig. 9 shows the second moving support means and the positioning means according to a first alternative embodiment of the present invention. Fig. 10 shows the second moving support means and the positioning means according to a second alternative embodiment of the present invention. Fig. 11 is a plan view of an alternative embodiment of the machine base. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to Fig. 1, a single facer according to an embodiment of the present invention has a horizontal machine base 10 mounted on a plant floor GL at a prescribed elevation offset from plant floor GL. A pair of main frames 11 (only one is shown in the figure) project from the machine base 10, the frames 11 being separated by a prescribed longitudinal distance perpendicular to the direction in which sheets are fed. The main frames 11 form a main device unit 12. Each of the main frames 11 has an opening 11a with prescribed dimensions. A corrugating roller unit 14 is longitudinally movable, separate from the main device unit 12. The corrugating roller unit 14, positioned at the alignment of the openings 11a, includes a corrugating roller roll-out apparatus (hereinafter referred to as "roll-out apparatus") 13. Referring to Fig. 2, the corrugating roller unit 14 includes a pair of secondary frames 15a and 15b separated by a prescribed longitudinal interval. A first corrugating roller 16, having an outer perimeter surface with waveform flutes, and a second corrugating roller 17, also having an outer perimeter surface with waveform flutes, rotatably extend longitudinally between the secondary frames 15a and 15b. A rotation axis of the first corrugating roller 16 is positioned directly below a rotation axis of the second corrugating roller 17. The respective waveform flutes of the first corrugating roller 16 mesh with those of the second corrugating roller 17. As described later, the corrugating roller unit 14 can be moved from the active position (first reference plane) on the machine base 10 in the main device unit 12 to an external roll-out, section (second reference plane) on the plant floor GL. This freedom of movement allows easy replacement of the corrugating rollers 16 and 17 outside of the device. Referring back to Fig, 1, an adhesive application mechanism 18 is between the primary frames 11 of the main device unit 12. The adhesive application mechanism 18 is positioned diagonally downward from the second corrugating roller 17, and to the side of the first corrugating roller 16 of the corrugating roller unit 14. Paper is sent from a paper feeding source, not shown in the figure, to a region where the first corrugating roller 16 and the second corrugating roller 17 mesh so that a prescribed corrugation results on the core paper. The adhesive application mechanism 18 applies adhesive to the peaks of the corrugation. The bonding means 19 is provided between the primary frames 11 near the second corrugating roller 17 so that a liner fed from opposite the core paper can be adhered and pressed against the corrugation peaks of the core paper between the second corrugating roller 17 and the bonding means 19. A single-face corrugated cardboard is thus formed. Furthermore, a plurality of roller-shaped preheaters 20, located between the primary frames 11, heat the core paper and the liner, preferably using steam. On the outside of the primary frames 11, positioning mechanisms 22, activated by oil hydraulic cylinders 21 , are located on either side of the laterally arranged openings 11a. The positioning mechanisms 22 keep the corrugating roller unit 14 at a fixed position in the active section. Referring to Fig. 3, a first sloped surface 10a is formed at the upper surface near the end of the machine base 10 on the side from which the corrugating roller unit 14 rolls out. A second sloped surface 10b, having a larger sloping angle than that of the first sloped surface 10a, is formed between the bottom end of the first sloped surface 10a and the edge of the outer end. Referring to Figs. 4(a), 4(b), 7(a), and 7(b), installation sections 23 project from the machine base 10 at positions corresponding to the secondary frames 15a and 15b of the corrugating roller unit 14 when it is rolled into the active section. The installation sections 23 are positioned so that a mounting section 24, projecting from the bottom surface of the secondary frames 15a and 15b, is in close proximity to the installation sections 23. The corrugating roller roll-out apparatus Referring again to Fig. 2, the corrugating roller roll-out apparatus 13 includes a first moving support means 25 and a second moving support means 26 located on a drive-side secondary frame 15A opposite from the roll-out side. A third moving support means 27 is located on an operation-side secondary frame 15B on the roll-out side. The roll-out apparatus 13 also includes positioning means 28, which keeps the second moving support means 26 at a support position. The first moving support means A drive-side bracket 29 is positioned roughly at a lateral mid point of the drive-side secondary frame 15A. The drive-side bracket 29 extends outward by a prescribed distance. An eccentric housing 30 is rotatably inserted in the drive-side bracket 29. Referring to Fig, 3, the eccentric housing 30 includes an axis 31 at a position eccentric by a prescribed amount from the center of rotation of the eccentric housing 30, At the ends of the axis 31, extending laterally out from the eccentric housing 30, first wheels 32 are rotatably disposed. The first wheels 32 serve as part of the first moving support means 25. Referring to Figs. 4(a) and 4(b), on the inside of the drive-side secondary frame 15A, a drive-side oil hydraulic cylinder 33 is rotatably disposed. A piston rod 33a of the cylinder 33 extends out through an opening 34 formed on the drive-side secondary frame 15A. The piston rod 33a is connected to the eccentric housing 30. The action of the drive-side oil hydraulic cylinder 33 causes the eccentric housing 30 to rotate forward or backward over a prescribed angle range relative to the drive-side bracket 29. By using the drive-side oil hydraulic cylinder 33 to rotate the eccentric housing 30 forwards or backwards, the first wheels 32 are raised or lowered by an amount determined by the eccentricity between the axis of the eccentric housing 30 and the axis 31. As described later, when the first wheels 32 are raised, the drive-side secondary frame 15A, which is moved down relative to the first wheels 32, is mounted on the machine base 10 (Fig. 4 (a)). Conversely, when the first wheels 32 are lowered, the drive-side secondary frame 15A, which is moved up relative to the first wheels 32, is moved up away from the machine base (Fig. 4 (b)). The second moving support means Referring to Figs. 3 and 5, a first bracket 36 projects from a horizontally disposed support section 35 inward from the drive-side secondary frame 15A. A holder 37, which is part of the second moving support means 26, is pivotably disposed on the first bracket 36. The free end of the holder 37 is formed so that an axis 38 can pass through laterally. Second wheels 39, rotatably disposed at the ends of the axis 38, form part of the second moving support means 26. The holder 37 hangs down from the first bracket 36 due to its own weight. From this orientation, the holder 37 provides movable support for the corrugating roller unit 14 when the second wheels 39 come into contact with the plant floor GL. With the holder 37 in a vertical orientation, the center of the axis 38 is on the side of drive-side secondary frame 15A (at the first wheels 32) relative to a perpendicular line passing through the pivot point of the holder 37. Thus, the weight of the corrugating roller unit 14 applied to the second wheels 39 causes the holder 37 to pivot toward the first wheels 32. When the second wheels 39 provide movable support for the corrugating roller unit 14, the first wheels 32 is set up to be at a height where they come into contact with the first sloped surface 10a of the machine base 10. Positioning means for the second moving support means The positioning means 28, on the support section 35, includes a pair of first and second link members 40 and 41 and a stopper 42. The positioning means 28 keeps the second moving support means 26 at a support position, where the second moving support means 26 provides movable support for the corrugating roller unit 14. The positioning means 28 also allows the second support means 26 to pivot to a non-support position. A second bracket 43 is disposed on a support member interposed between the first bracket 36 and the drive-side secondary frame 15A. The stopper 42, which can come into contact with the outer surface of the holder 37 (the side facing the drive-side secondary frame 15A), is disposed on the second bracket 43. The stopper 42 acts to restrict the pivoting of the holder 37 toward the first wheels 32. The stopper 42 is positioned so that its position relative to the second bracket 43 can be adjusted, thus permitting the amount of the movement of the holder 37 to be restricted in accordance with such an adjustment. One longitudinal end of the first link member 40 is rotatably attached to a third bracket 44, projecting from the support member 35 on the side of the holder 37 opposite from the first wheels 32. A free end (the other longitudinal end) of the first link member 40 is positioned near an inward side of the holder 37. A longitudinal end of the second link member 41 is rotatably attached to the second bracket 43. A free end (the other longitudinal end) of the second link member 41 extends inward from the holder 37. A slot 41a is formed near the free end of the second link member 41 and a link pin 45, on the free end of the first link member 40, is slidably inserted in the slot 41a. This provides a pivotable connection between the first link member 40 and the second link member 41. When the link members 40 and 41 are hanging downward due to their own weight, the free end of the first link member 40 extends to a restricted position where it is close to and can come into contact with the inward side of the holder 37. This prevents the holder 37 from pivoting away from the first wheels 32. Referring to Fig. 6, a sloped surface 37a is formed on an inward surface of the holder 37 where it comes into contact with the free end of the first link member 40. The sloped surface 37a slopes outward and downward as shown in the figure. When the holder 37, which contacts the first link member 40 through the sloped surface 37a, begins to pivot inward, the first link member 40 prevents the holder 37 from pivoting upward to a permissive position where the holder 37 is permitted to pivot. A support section 41b, on the second link member 41, extends toward the drive-side secondary frame 15A. The support section 41b rotatably supports a follower 46. When the link members 40 and 41 hang downward due to their own weight, the follower 46 contacts second sloped surface 10b formed on the machine base 10. As the corrugating roller unit 14 moves from the roll-out section to the active section, the follower 46 contacts the second sloped surface 10b. The second link member 41 rotates in the clockwise direction in Fig. 3. As the second link member 41 rotates, the first link member 40 rotates in the counterclockwise direction in Fig. 3 and the holder 37 pivots from the restricted position to the upper, permissive position. Thus, when the second wheels 39 contact the machine base 10, the holder 37 pivots away from the machine base 10, as described later, thus allowing the second wheels 39 to ride up onto the upper surface of the machine base 10. The third moving support means Referring to Figs. 7(a) and 7(b), a support member 48 is rotatably attached to the operation-side secondary frame 15B through an operation-side bracket 47. A pair of laterally separated third wheels 49, forming part of a third moving support means 27, are rotatably disposed on the support member 48. The bottom ends of a pair of laterally separated first connecting members 50 are pivotably attached to the support member 48. The upper ends of the first connecting members 50 are pivotably attached to second connecting members 51. The upper ends of the second connecting members 51 are pivotably attached to corresponding positions on the operation-side secondary frame 15B. A support piece 51a, located near the bottom end of each connecting member 51, is connected to a piston rod 52a of an operation-side oil hydraulic cylinder 52. The bottom end of the oil hydraulic cylinder 52 is pivotably connected to the operation-side bracket 47. When the operation-side oil hydraulic cylinder 52 is activated, the connecting members 50 and 51 are pivoted so that the third wheels 49 are raised and lowered relative to the plant floor GL. As described later, when the third wheels 49 are raised, the operation-side secondary frame 15B, which is moved down relative to the third wheels 49, is mounted on the machine base 10(Fig.7 (a)). Conversely, when the third wheels 49 are lowered, the operation-side secondary frame 15B,which is moved up relative to the third wheels 49, is raised upward from the machine base 10 (Fig.7 (b)). When the piston rod 52a of the operation-side oil hydraulic cylinder 52 is completely retracted, the connecting sections of the connecting members 50 and 51 are bent down to a position below a line connecting the pivot points of the connecting members 50 and 51. Thus, the connecting members 50 and 51 cannot be bent down further even if, for example, oil hydraulic pressure in the operation-side oil hydraulic cylinder 52 is lost. This prevents the third wheels 49 from moving up and the corrugating roller unit 14 from dropping to the plant floor CL when the corrugating roller unit 14 is moved. The following is a description of the operations performed by the single-facer corrugating roller roll-out apparatus according to the embodiment described above. Moving the corrugating roller unit from an active section to a roll-out section Referring to Figs. 4(a), 7(a), and 8(c), when the single-facer is active, the corrugating roller unit 14 is positioned in the active section on the machine base 10 so that the corrugating roller unit 14 is mounted on the mounting sections 24A,B of the secondary frames 15A and 15B corresponding to the installation sections 23A,B. The third wheels 49 of the third moving support means 27 are disposed on the plant floor GL away from the machine base 10 toward the roll-out side. The second wheels 39 of the second moving support means 26 contact the upper surface of the machine base 10. The follower 46 of the second link member 41 of the positioning means 28 contacts the upper surface of the machine base 10, thus keeping the first link member 40 in the permissive position. When the upper and lower corrugating rollers 16 and 17 of the single-facer must be replaced due to wear in the waveform flutes, or if the rollers must be replaced with rollers having waveform corrugations different from the former rollers due to an order change by a client, the corrugating roller unit 14 is moved from the active section to the roll-out section. First, the drive-side and operation-side oil hydraulic cylinders 33 and 52 are activated in tandem so that the piston rods 33a and 52a are retracted. In the moving support means 25, this retraction causes the eccentric housing 30 to rotate relative to the drive-side bracket 29. Referring to Fig. 4 (b), the first wheels 32 are lowered to contact the upper surface of the machine base 10, causing the drive side secondary frame 15A to be lifted. Referring to Fig.7(b), in the third moving support means 27, the connecting members 50 and 51 are bent downward, causing the support member 48 to pivot relative to the operation-side bracket 47. The third wheels 49 are lowered to contact the plant floor GL. The operation-side secondary frame 15B is then raised up. As a result, the mounting sections 24A,B of the secondary frames 15A and 15B are raised up from the installation sections 23A,B of the machine base 10. The corrugating roller unit 14 is now movably supported by the first wheels 32 and third wheels 49. When the corrugating roller unit 14 is moved toward the operation side in this state, the corrugating roller unit 14 is pulled out from the active section to the roll-out section. As the unit 14 is pulled out and the second wheels 39 move away from the operation-side end of the machine base 10, the holder 37, on which the wheels 39 are disposed, drop down due to its own weight and is oriented in a perpendicular direction (see Fig. 8 (b)). The outer surface of the holder 37 contacts the stopper 42. This causes the holder 37 to be positioned at the support position. As the corrugating roller unit 14 is moved further, the follower 46 of the second link member 41 moves away from the operation-side end of the machine base 10. The second link member 41 pivots counterclockwise due to its own weight and the first link member 40 pivots clockwise from the permissive position to the restricted position. The free end of the first link member 40 moves to the restricted position where it contacts the inward side of the holder 37, which is kept in a state where it cannot tilt (see Fig. 8 (a)). As the first wheels 32 move along the first sloped surface 10a of the machine base 10, the corrugating roller unit 14 is lowered slightly. The second wheels 39 thus contact the plant floor GL. The drive side of the corrugating roller unit 14 is then movably supported by the second wheels 39. Thus, the corrugating roller unit 14 will subsequently be supported by the second wheels 39 and the third wheels 49. With the holder 37 oriented perpendicularly, the weight of the corrugating roller unit 14 on the second wheels 39 causes a force to be applied on the holder 37 so that the holder 37 pivots toward a position where it contacts the stopper 42. Thus, as the corrugating roller unit 14 moves from the active section to the roll-out section, the corrugating roller unit 14 is prevented from moving down due to the fact that the holder 37 pivots away from the first wheels 32. Moving the corrugating roller unit from a roll-out section to an active section Once the corrugating rollers have been replaced at the roll-out section of the plant floor GL, the corrugating roller unit 14 is pushed from the roll-out section to the active section so that it can be restored back to the active section. Referring to Fig. 6, the holder 37 for the second wheels 39 receives a force that moves it away from the stopper 42. If the second wheels 39 ride up on debris on the plant floor GL, it is possible for the holder 37 to pivot away from the stopper 42. However, in the roll-out apparatus 13, the first link member 40 of the positioning means 28 is moved to the restricted position where it can contact the inward side of the holder 37. This reliably prevents the holder 37 from pivoting inward and tilting. Also, since the first link member 40 is in contact with the sloped surface of the holder 37, the force acting in the direction of the causing holder 37 to pivot inward acts to push the first link member 40 downward. Thus the first link member 40 does not move from the restricted position to the upper permissive position. Referring to Fig. 8 (a), the corrugating roller unit 14 is moved while being supported by the second wheels 39 and the third wheels 49 (not shown in the figure). The first wheels 32 are moved while being in contact with the first sloped surface 10a of the machine base 10. This movement causes the corrugating roller unit 14 to be lifted up slightly. The second wheels 39 move away from the plant floor GL and the corrugating roller unit 14 is movably supported by the first wheels 32 and the third wheels 49. Next, before the second wheels 39 contact the edge of the machine base 10, the follower 46 of the second link member 41 contacts the second sloped surface 10b. Referring to Fig. 8 (b), the second link member 41 pivots clockwise. Thus, the first link member 40 connected to the second link member 41 pivots counterclockwise from the restricted position to the permissive position. The holder 37 is thus able to pivot inward . As the corrugating roller unit 14 moves, the holder 37 slopes inward while at the same time the second wheels 39 move while being successively in contact with the edge of the machine base 10, that is, the second sloped surface 10b and the first sloped surface 10a. Thus, the second wheels 39 ride smoothly up onto the upper surface of the machine base 10(see Fig. 8 (c)). Then, the corrugating roller unit 14 is stopped when the mounting sections 24A,B of the secondary frames 15A and 15B of the corrugating roller unit 14 are positioned above the corresponding installation sections 23A,B. Next, the drive-side and operation-side oil hydraulic cylinders 33 and 52 are activate in tandem in opposite directions so that the first wheels 32 and third wheels 49 rise. Referring to Figs. 4(a) and 7(a), the entire corrugating roller unit 14 is lowered so that the mounting sections 24A,B are mounted on the installation sections 23A,B, respectively. This completes the positioning of the corrugating roller unit 14 at the active section. Once the corrugating roller unit 14 is positioned in the active section of the main device unit 12, the positioning mechanisms 22 are activated so that the corrugating roller unit 14 is reliably fixed at a fixed position. The present invention is not restricted to the embodiments described above, that is, various alternative embodiments can also be implemented. Referring to Fig.9, an oil hydraulic cylinder 53 is disposed to be perpendicularly suspended from a support member 35 as part of positioning means 28. Second moving support means 26 is positioned on a piston rod 53a, which hangs down from the hydraulic cylinder 53. The second moving support means 26 includes a holder 54 connected to the piston rod 53a. Second wheels 39 are rotatably supported by the holder 54. The hydraulic cylinder 53 is activated to bring the second wheels 39 into contact with the plant floor GL, thus keeping a corrugating roller unit 14 in a support position (indicated by solid lines in the figure), where it is movably supported. When piston rod 53a is retracted, the second wheels 39 move to a non-support position (indicated by dotted lines in the figure), where they do not obstruct a machine base 10. An oil hydraulic cylinder is preferably used as the oil hydraulic cylinder 53. In this first alternative embodiment, when the corrugating roller unit 14 is moved from the active section to the roll-out section, the second support means 26 moves away from the operation-side end of the machine base 10. The hydraulic cylinder 53 is then activated so that the second wheels 39 move from the non-support position to the support position. This movement allows the drive side of the corrugating roller unit 14 to be movably supported by the second wheels 39. When the corrugating roller unit 14 moves from the roll-out section to the active section, the first wheels 32 of the first moving support means 25 contacts the top of the machine base 10. The hydraulic cylinder 53 is activated so that the second wheels 39 move from the support position to the non-support position. As a result, the drive side of the corrugating roller unit 14 is movably supported by the first wheels 32. Movement of the corrugating roller unit 14 is thus not restricted due to the second wheels 39 obstructing machine base 10. Referring to Fig. 10, in a second alternative embodiment, rotatably supported second wheels 39 of a holder 55 form part of second moving support means 26. A shaft (not shown in the figure) is disposed on the holder 55. The second moving support means 26 moves up and down relative to a support member 35 through the shaft. A motor 56, capable of operating forwardly and in reverse, serves as part of positioning means 28. The motor 56 is disposed on the support member 35. The motor 56 and the second moving support means 26 are connected with a raising/lowering mechanism 59, which includes a pinion 57 disposed on the output shaft of the motor 56, and a rack 58 projected from the holder 55 to mesh with the pinion 57. The motor 56 rotates in a prescribed direction so that the second moving support means 26 is lowered with the raising/lowering mechanism 59. Thus, second wheels 39 are brought into contact with plant floor GL, thus, keeping a corrugating roller unit 14 at a support position (indicated by the solid lines in the figure), where it is movably supported. When the motor 56 is rotated in reverse and the second support means 26 is raised, the second wheels 39 are moved to a non-support position where they do not obstruct the machine base 10. As with the first alternative embodiment, the second alternative embodiment described above involves moving the second wheels 39 from the support position to the non-support position by operating the motor 56 forwardly and in reverse. Thus, the corrugating roller unit 14 is moved smoothly from the active section to the rollout section or from the roll-out section to the active section. In the embodiments and alternative embodiments, the roll-out section is described as being outside the main device unit 12. Referring to Fig. 11, it is also possible to form a cutout section 60 in the machine base 10 to serve as a roll-out section (the second reference plane). The cut-out section 60 is cut down to the same level as the plant floor GL. This way, the roll-out section is disposed in the main device unit 12 and the corrugating roller roll-out apparatus can be efficiently implemented. In this case, the second moving support means 26 of the corrugating roller unit 14 moves along the cut-out section 60 in the main device unit 12. At the end of the movement of the second moving support means 26, the second wheels 39 move to the support position or the non-support position. This permits corrugating roller unit 14 to move smoothly from the active section to the roll-out section (the cut-out section 60) or from the roll-out section (the cut-out section 60) to the active section.The first and third wheels do not have to be structured so that they can be raised and lowered, as described in the embodiments above. It is also possible to have the first and third wheels in a fixed position as long as the corrugating roll unit can be positioned at the active section with the first and third wheels being in contact with the machine base or the plant floor. Alternatively, the entire corrugating roller unit can be raised and positioned using oil hydraulic means or the like. Also, on the operation side of the corrugating roller unit, it is also possible to use, instead of the third moving support means, the first moving support means and the second moving support means in the same way as they are used on the drive side, and thus to have the entire corrugating roller unit move onto the machine base, Furthermore, in the positioning means, the means used to move the first link member between the restricted position and the permissive position does not have include the second link member and the follower as described in the embodiments above. For example, elastic means can be used to keep the first link member in the permissive position. By using an appropriate means, application of the elastic force from the elastic means on the first link member can be stopped so that the first link member moves to the restricted position due to its own weight. In the embodiments, the upper-surface plane of the machine base (the active section) on which the single-facer device is installed is described as being positioned higher than the plant floor plane (the roll-out section), It is also possible to have the upper-surface plane of the machine base (the active section) positioned lower than the plant floor (the roll-out section) in order to have the single-facer device instolled at a lower position. Thus, a low second reference plane would be disposed within the main device unit and a high first reference plane would be disposed outside of the main device unit. Under such a condition, the roll-out apparatus of the present invention can also be used to move the corrugating roller unit smoothly in this case as well. More specifically, the second moving support means is disposed at a position in front of (relative to the direction of movement) the machine base of the corrugating roller unit. The first moving support means is disposed behind the second moving support means. On the machine base, which is lower then the plant floor, the second moving support means is used to movably support the corrugating roller unit, while on the plant floor, the first moving support means is used to movably support the unit. As described above, the single-facer corrugating roll roll-out apparatus according to the present invention allows the roll-out apparatus to be smoothly moved between a first reference plane and a second reference plane, even if there is a prescribed offset between the first reference plane and the second reference plane. This eliminates the need to perform large-scale construction on the plant, floor on which the single-facer is to be installed. Furthermore, this keeps installation costs down. By forming positioning means from a pair of link members and activating means, the second moving support means can be moved between a support position and a non-support position without the use of driving means. This further reduces the production costs involved in the roll-out apparatus. Having described preferred embodiments of the invention with reference to the accompanying drawings, it is to be understood that the invention is not limited to these precise embodiments, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope of the invention as defined in the appended claims.

Claims: A roll unit (14) including at its one axial end first means (27) for supporting and moving the roll unit on a floor and at its other axial end second means (25) for supporting and moving the roll unit on the floor: said first supporting and moving means (27) movably supporting the roll unit against a first floor (GL), characterized in that said second supporting and moving means (25) movably supports the roll unit against a second floor (10), the level of which is different from that of the first floor, said second supporting and moving means (25) includes an auxiliary means (26) for movably supporting the roll unit against said first floor which auxiliary means is disposed at a predetermined position between said first and second supporting and moving means (27,25) along the axial direction, said roll unit (14) further comprising means for selecting from between said auxiliary means (26) and said second supporting and moving means (25) the means which cooperates with said first supporting and moving means (27) to movably support the roll unit, said selection being made by changing the level of said auxiliary means (26) relative to said second supporting and moving means (25). A roll unit according to claim 1, wherein: said roll unit further includes means for keeping said auxiliary means (26) off of said second floor when said roll unit is moved from said first floor to said second floor, the level of which is higher than that of said first floor. A roll unit according to claim 1 or 2, wherein: said selecting means includes means for swinging said auxiliary means (26) relative to said roll unit (14) about the direction which is substantially perpendicular to the axial direction of the roll, means (28,42) for locking said auxiliary means (26) at a predetermined swing position, and means (40,41,46) for automatically unlocking said auxiliary means (26) at the predetermined swing position by utilizing a stepped portion between the first and second floors when said roll unit (14) is moved between the first and the second floors. A roll unit according to claim 3, wherein: said auxiliary means (26) includes a swingable holder (37) suspended from the roll unit (14), said locking means includes a first link (40) one end of which is pivotably mounted on said roll unit (14) so that said link (40) is rotated about the one end between an engaging position where the other end engages an outer edge of said holder and a disengaging position, said unlocking means includes a second link (41) one end of which is pivotably mounted on said roll unit (14) and the other end of which is connected to said first link (40 ) in such a way that the second link (41) can be rotated about the one end so as to rotate said first link (40), said second link (41) includes a follower (46) for pivoting said second link (41) due to the follower's movement which follows said stepped portion to pivot said first link (40) between said engaging position and said disengaging position. A roll unit according to claim 1 or 2, wherein: said selecting means includes driving means for moving said auxiliary means (26) up and down relative to said roll unit (14).

Inventors: HATASA KAZUHIRO, SUGINO KATSUYA, YAMAZAKI YUUJI, HATASA, KAZUHIRO, SUGINO, KATSUYA, YAMAZAKI, YUUJI
Applicants: ISOWA KK, KABUSHIKI KAISHA ISOWA
Application year: 1999
Main classification: B31F1
IPC codes: B31F1