JP5395145B2 - Levitation drying equipment with meandering correction device - Google Patents

Description

  The present invention relates to a flotation drying apparatus that dries a coating film applied to one surface of a web while blowing the hot air from a nozzle onto both upper and lower surfaces of the film or paper, etc. The present invention relates to a flotation drying facility with a meandering correction device that corrects meandering in the width direction of a web that occurs during traveling.

  The meandering correction device (the former) for correcting the meandering of the web traveling in the web passage inside the flotation drying device is respectively provided at one end and the other end in the width direction of the web passage on the upper surface side of the web passage. The first suction nozzle and the second suction nozzle that are disposed, and a third suction disposed at one end and the other end in the width direction of the web passage on the lower surface side of the web passage, respectively. A first duct having a nozzle and a fourth suction nozzle, an opening adjusting mechanism to which the first suction nozzle and the third suction nozzle are connected, respectively, a second suction nozzle and a fourth suction nozzle; A second duct having an opening adjustment mechanism connected thereto, and a suction device for sucking the gas in the first and second ducts; and an opening adjustment mechanism of the first duct and the second duct Independent of the opening adjustment mechanism of the duct There are those capable work (Patent Document 1).

  When meandering in the width direction of the web occurs in the running web, the opening adjustment mechanism of the first duct and the second duct is operated to adjust the first end provided on one side of the web. Because the gas in the vicinity of the web flows from the one suction nozzle and the third suction nozzle to the second suction nozzle and the fourth suction nozzle provided on the other end of the web, or in the opposite direction. The meandering is corrected by moving the web in the direction opposite to the meandering direction by the flow of gas in the width direction of the web.

  Further, as the meandering correction device (the latter) for correcting the meandering of the web outside the flotation drying device, two rolls in contact with one surface of the running web and one roll in contact with the other surface are arranged in the web running direction. There is one that can be tilted in the width direction (Patent Document 2).

Japanese Patent No. 3676599 JP 2009-190854 A

  By the way, when the meandering correction device of the former is used to correct the meandering of the web, the ratio of the amount of gas flowing to one side in the width direction of the web and the amount of gas flowing to the other side changes. There is a problem that non-uniformity occurs in the drying capacity in the entire region in the width direction, and as a result, there is a problem that non-uniformity in the dry state occurs in the width direction of the coating film applied to one surface of the web.

  When the latter meandering correction device is placed in the middle of the web passage of the levitation drying device, the coating film applied to the one side surface of the web comes into contact with the roll, so that the coating film may have defects such as scratches. There is.

  In order to solve the above problems, an object of the present invention is to provide a flotation drying equipment with a meandering correction device that does not cause unevenness in the dry state in the width direction of the coating film and defects such as scratches on the coating film.

  The means employed by the present invention according to claim 1 in order to prevent non-uniformity in the dry state in the width direction of the coating film and defects such as scratches on the coating film are as shown in FIGS. Two drying chambers 2a for blowing gas from the nozzle box 3 on one side and the other side are adjacent to both sides of the web passage R extending so that one surface Rw is the coated surface side and the other surface Rd is the non-coated surface side. The levitation drying apparatus 2 includes a meandering correction device 4 and a meandering correction device 4 disposed between adjacent drying chambers 2a and 2a. A plurality of guide rolls 6 arranged in parallel so as to be in contact with the direction Rd, and arranged on the opposite side of the web path R with respect to the guide rolls 6, the gap J between the adjacent guide rolls 6, 6 is sucked. The suction tool 5 and the outer side of the web passage R The gas is blown from one side Rw of the web passage R to the web passage R, and a winding region Rb along the outer peripheral surface 6a of the guide roll 6 is formed in the web passage R so as not to contact the web passage R. A levitation drying apparatus with a meandering correction device, comprising: a tool 7; and a tilting operation tool 8 for tilting the guide roll 6, the suction tool 5, and the wrapping gas blowing tool 7 with respect to the left-right direction. is there.

  In order to ensure that the web W is guided to the guide roll 6, the means adopted by the present invention according to claim 2 is that, as shown in FIGS. 6 and 13, the wrapping gas blowing tool 7 is disposed on the upstream side of the passage. In the winding region Rb of the web passage R in contact with the guide roll 6 on the downstream side of the passage, and the outlet 7c for blowing gas toward the vicinity of the upstream edge portion Rc in the winding region Rb of the web passage R in contact with the guide roll 6 The meander of Claim 1 provided with the blowing outlet 7c which blows gas toward the downstream edge part Rc vicinity location, and the intermediate blowing outlet 7c which blows gas toward between the adjacent guide rolls 6 and 6. It is a flotation drying facility with a correction device.

  In order to ensure that the web W is guided by the guide roll 6, the means employed by the present invention as claimed in claim 3 is the gas blowing tool 7 for winding as shown in FIGS. 11, 12, 14 and 15. However, the air outlet 7c that blows gas toward the vicinity of the upstream edge portion Rc in the winding region Rb of the web passage R that is in contact with the guide roll 6 on the upstream side of the passage, and the web passage R that is in contact with the guide roll 6 on the downstream side of the passage. And a gas guide surface portion 7d facing the guide rolls 6 through the web passage R, both of the gas guide surface portions 7d. The levitation drying equipment with a meandering correction device according to claim 1, wherein each of the Coanda portions 7e, 7e bent at the edge faces the outlet 7c.

  In order to prevent the gas in the drying chamber 2b from leaking to the outside through the meandering correction device 4, the means adopted by the present invention as claimed in claim 4 is that the meandering correction device 4 is as shown in FIG. 2, FIG. 4 and FIG. The meandering correction chamber 4a is provided between the adjacent drying chambers 2a, 2a, and the partition wall portion 4c surrounding the chamber 4b of the meandering correction chamber 4a is airtight to the partition wall portion 2c surrounding the chamber 2b of each drying chamber 2a. The non-breathable structure which is joined and the right and left both ends of the meandering correction device 4 are disposed outside the meandering correction chamber 4a through the opening 4d provided in the partition wall 4c of the meandering correction chamber 4a. Connected to the connecting plate 9, the peripheral edge of the opening 4 d and the connecting plate 9 are joined in an airtight manner by a flexible and non-breathable joining tube portion 10 that surrounds both the left and right sides of the meandering correction device 4. The tool 8 is connected to the connecting plate 9 outside the meandering correction chamber 4a. A meandering correction apparatus with flotation drying equipment according to any one of claim 1 to 3.

  In order to prevent the temperature of the web W from being raised by the guide roll 6, the means adopted by the present invention according to claim 5 is that, as shown in FIG. A circulation passage 34 joining the intake side 34a to the chamber 4b and the suction tool 5 of the meandering correction chamber 4a, a circulation fan 35 disposed in the circulation passage 34 and a heater 36 with a temperature controller, and an air volume joined to the circulation passage 34 The gas circulation device 25 having the exhaust path 38 with a damper for adjustment is provided, and the temperature of the gas around the guide roll 6 in the chamber 4b of the meandering correction chamber 4a is adjusted from the drying chamber 2a by adjusting the temperature of the heater 36. The levitation drying equipment with a meandering correction device according to claim 4, wherein the temperature is T2 or less of the web W to be sent out.

  The means employed by the present invention according to claim 6 to prevent unevenness in the dry state in the width direction of the coating film and defects such as scratches in the coating film are as shown in FIGS. Two drying chambers 2a for blowing gas from the nozzle box 3 on one side and the other side are adjacent to both sides of the web passage R extending so that one surface Rw is the coated surface side and the other surface Rd is the non-coated surface side. The levitation drying apparatus 2 includes a meandering correction device 4 and a meandering correction device 4 disposed between adjacent drying chambers 2a and 2a. A plurality of guide rolls 6 arranged in parallel so as to be in contact with the direction Rd, and arranged on the opposite side of the web path R with respect to the guide rolls 6, the gap between the adjacent guide rolls 6, 6 is in a suction state. Suction tool 5 to perform, these guide rolls 6 and A meandering correction apparatus with flotation drying equipment, characterized in that a tilt operation device 8 for tilting with respect to the suction attachment 5 lateral direction.

  In order to prevent the gas in the drying chamber 2b from leaking outside through the meandering correction device 4, the means adopted by the present invention as claimed in claim 7 is that the meandering correction device 4 is adjacent to each other as shown in FIGS. A meandering correction chamber 4a is provided between the drying chambers 2a and 2a, and a partition wall portion 4c surrounding the chamber 4b of the meandering correction chamber 4a is airtightly joined to the partition wall portion 2c surrounding the chamber 2b of each drying chamber 2a, The left and right ends of the meandering correction device 4 are inserted through the opening 4d provided in the partition wall 4c of the meandering correction chamber 4a, and the non-breathable connecting plate 9 is disposed outside the meandering correction chamber 4a. The peripheral edge of the opening 4d and the connecting plate 9 are joined in an airtight manner by a flexible and non-breathable joining tube 10 surrounding the left and right ends of the meandering correction device 4, and the tilting operation tool 8 is , Connected to the connecting plate 9 outside the meandering correction chamber 4a 6 is a meandering correction apparatus with flotation drying equipment according to.

  In order to prevent the temperature of the web W from being raised by the guide roll 6, the means adopted by the present invention according to claim 8 is that, as shown in FIG. 18, the suction side 5a is joined to the suction tool 5 and the meandering correction chamber 4a is provided. 4b, a circulation passage 34 that joins the air supply side 34b, a circulation fan 35 and a heater 36 with a temperature regulator disposed in the circulation passage 34, and an exhaust passage 38 with a damper for adjusting the air volume joined to the circulation passage 34. The temperature of the gas around the guide roll 6 in the chamber 4b of the meandering correction chamber 4a is adjusted to be equal to or lower than the temperature value T2 of the web W sent out from the drying chamber 2a by adjusting the temperature of the heater 36. The levitation drying facility with a meandering correction device according to claim 7, wherein the levitation drying device is configured to be able to perform the above.

  In order to connect the adjacent drying chambers 2a, 2a in a refracted state, the means adopted by the present invention according to claim 9 is that, as shown in FIGS. 15 and 16, the adjacent drying chambers 2a, 2a are each drying chamber. 9. The meander according to claim 1, wherein the virtual planes P and P intersect each other with respect to the virtual plane P extending along the web path R between the nozzle box 3 on one side and the other side of 2 a. It is a flotation drying facility with a correction device.

  According to a first aspect of the present invention, there is provided a flotation drying apparatus with a meandering correction device, wherein a gap between adjacent guide rolls pulls in the web by suction with a suction tool, and a gas ejected from a winding gas blowing tool guides the web into the guide roll. The web is surely wound around the guide roll by the synergistic action of crimping to the guide roll, and the web is surely guided without side-sliding in the left-right direction to correct the meander, so that the meander correction is sprayed from the nozzle box of the drying chamber. Because there is no change in the movement of gas passing through the surface of the web, it is possible to maintain a uniform dry state in the width direction of the coating film, and there is no contact between the coated surface side of the web and the meandering correction device In addition, the coating film does not cause defects such as scratches.

  According to a second aspect of the present invention, there is provided a flotation drying apparatus with a meandering correction device, wherein a plurality of guides are provided for a web traveling in a web passage with gas blown out from a blowout port on both sides and an intermediate blowout port of a winding gas sprayer. By winding on the roll and increasing the winding length, the web can be reliably guided without sliding the web on the guide roll.

  The levitation drying equipment with a meandering correction device according to the present invention of claim 3, the gas blown out from the blowout ports on both sides of the wrapping gas blowing tool is changed in direction to the gas guide surface part by the Coanda effect of the Coanda part, A positive static pressure larger than the static pressure on the other side of the web passage is generated between the web traveling in the web passage and the gas guide surface portion, and the web is pressure-bonded to the guide roll with this positive static pressure. The web can be reliably guided without sliding the web.

  In the levitation drying apparatus with a meandering correction device according to the present invention of claim 4, the inside of the meandering correction chamber is hermetically surrounded by the partition wall portion, the connecting plate, and the joining cylinder portion of the meandering correction chamber. Gas that has moved into the meandering chamber is not leaked to the outside.

  In the flotation drying apparatus with a meandering correction device according to the fifth aspect of the present invention, the temperature value of the outer peripheral surface in contact with the guide roll web does not exceed the temperature value of the web fed from the drying chamber. There is no warming, and no damage such as thermal contraction due to heating is given to the web.

  The levitation drying apparatus with a meandering correction device according to the sixth aspect of the present invention is configured to correct meandering by tilting the guide roll and suction tool of the meandering correction device with the tilting operation tool with respect to the web traveling in the web passage. In addition, since the movement state of the gas blown from the nozzle box of the drying chamber and passing through the surface of the web is not changed, it is possible to maintain the uniformity of the dry state in the width direction of the coating film, and to the coated surface side of the web Since there is no contact with the meandering correction device, the coating film does not cause defects such as scratches.

  The levitation drying apparatus with a meandering correction device according to the present invention described in claim 7 is characterized in that the inside of the meandering correction chamber is hermetically surrounded by the partition wall portion, the connecting plate and the joining cylinder portion of the meandering correction chamber. The gas that has moved into the meandering correction chamber from outside is not leaked to the outside.

  In the levitation drying apparatus with a meandering correction device according to the present invention, the temperature value of the outer peripheral surface of the guide roll in contact with the web does not exceed the temperature value of the web sent out from the drying chamber. There is no increase in temperature, and no damage such as thermal shrinkage due to heating is given to the web.

  The levitation drying apparatus with a meandering correction device according to the present invention according to claim 9 ensures a floating state of the web between the adjacent drying chambers by intersecting virtual planes along the web path of the adjacent drying chamber. It is possible to meet the demand to connect adjacent drying chambers in a refracted state.

BRIEF DESCRIPTION OF THE DRAWINGS It is a right view which shows 1st Embodiment of the floating drying equipment with a meandering correction apparatus which concerns on this invention (henceforth "the present invention floating drying equipment"). It is the top view which abbreviate | omitted the middle section taken along the line C2-C2 of FIG. FIG. 3 is a right side view taken along line C3-C3 in FIG. FIG. 3 is a front view taken along line C4-C4 of FIG. It is the side view which expanded and showed the nozzle box 3 of the upper and lower sides of the drying chamber 2a in 1st Embodiment. It is the side view which expanded and showed the circumference | surroundings of the two guide rolls 6 and 6, the suction tool 5, and the gas blowing tool 7 for winding of the meandering correction apparatus 4 in 1st Embodiment. It is the front view which carried out the cross section which shows the vicinity of the space | interval adjustment apparatus 47 for adjusting the space | interval of the right-and-left end seal members 45 and 45 which comprise the suction tool 5 in 1st Embodiment. It is the top view which abbreviate | omitted the intermediate | middle which shows the state of the meandering correction apparatus 4 in 1st Embodiment, The figure (A) shows two guide rolls 6 and 6, the suction tool 5, and the gas blowing tool 7 for winding. FIG. 5B shows a state in which the two guide rolls 6, 6, the suction tool 5 and the wrapping gas blowing tool 7 are moved to the right side and are tilted. (C) shows a state where the two guide rolls 6 and 6, the suction tool 5 and the wrapping gas blowing tool 7 are moved to the left and tilted. It is a top view which shows simply the mechanism of the meandering correction apparatus 4 in 1st Embodiment. It is a schematic surface which shows the gas circulation apparatus 24 of the flotation drying apparatus 2 in 1st Embodiment, and the gas circulation apparatus 25 of the meandering correction apparatus 4. FIG. It is the sectional side view which expanded and showed the circumference | surroundings of the two guide rolls 6 and 6 of the meandering correction apparatus 4 in 1st Embodiment, the suction tool 5, and the winding gas spraying tool 7 of another aspect. It is the sectional side view which expanded and showed the circumference | surroundings of the two guide rolls 6 and 6 of the meandering correction apparatus 4 in 1st Embodiment, the suction tool 5, and the winding gas spraying tool 7 of another aspect. It is the side view which expanded and showed the circumference | surroundings of the three guide rolls 6, 6, 6, the suction tool 5, and the gas blowing tool 7 for winding of the meandering correction apparatus 4 in 1st Embodiment. It is the side view which expanded and showed the circumference | surroundings of the three guide rolls 6, 6, 6, the suction tool 5, and the gas blowing tool 7 for winding of another aspect of the meandering correction apparatus 4 in 1st Embodiment. is there. Sectional side view which expanded and showed the circumference | surroundings of the three guide rolls 6 and 6 of the meandering correction apparatus 4 in 1st Embodiment, 6, 6, the suction tool 5, and the gas blowing tool 7 for winding of another aspect. It is. It is the side view which carried out the cross section which shows this invention flotation drying equipment 61 which concerns on 2nd Embodiment. It is the side view which carried out the cross section which shows this invention levitation drying equipment 71 which concerns on 3rd Embodiment. It is the sectional side view which shows this invention levitation drying equipment 81 which concerns on 4th Embodiment, Comprising: The gas circulation apparatus 24 of the levitation drying apparatus 2 and the gas circulation apparatus 25 of the meandering correction apparatus 4 are shown roughly. is there. It is the front view which carried out the cross section of this invention levitation drying equipment 81 which concerns on 4th Embodiment. It is the side view which expanded and showed the circumference of the guide rolls 6 and 6 and the suction tool 5 of the meandering correction apparatus 4 in 4th Embodiment, Comprising: FIG. (A) is two guide rolls 6 and 6 of FIG. FIG. 5B shows the case of three guide rolls 6, 6 and 6.

(First embodiment)
As shown in FIGS. 1 to 3, the flotation drying equipment 1 according to the first embodiment extends in the front-rear direction and has one surface Rw (see FIG. 3) on the coating surface side and the other surface Rd not coated. Adjacent to both sides of the web passage R on the landing side are two drying chambers 2a for blowing gas from the nozzle box 3 on one side (side facing the one side Rw) and the other side (side facing the other side Rd). And the meandering correction device 4 disposed between the adjacent drying chambers 2a, 2a. The web W in this example travels from the front to the rear in the web path R.

  As shown in FIG. 3, the drying chamber 2a includes a partition wall 2c surrounding a chamber 2b through which the web passage R passes, nozzle groups N1 and N2 arranged on the upper and lower sides across the web passage R, and an upper side (one side). ) And an air supply duct 20 that communicates with each nozzle box 3 of the lower (other side) nozzle group N2. Each of the nozzle groups N1, N2 appropriately has a plurality of nozzle boxes 3, 3... Extending in the left-right direction (direction orthogonal to the front-rear direction) of the levitation drying equipment 1 of the present invention within a range of dimension S (for example, 150 to 500 mm). The nozzle box 3 of the nozzle group N2 is opposed between the adjacent nozzle boxes 3 and 3 of the nozzle group N1. As shown in FIG. 10, each of the air supply ducts 19 and 20 distributes gas (for example, air or nitrogen gas) G supplied from the gas circulation device 24 to each nozzle box 3. In the drying chamber 2a, openings 2d and 2e are formed in the partition wall 2c, and the gas circulated from the nozzle box 3 of the upper (one side) nozzle group N1 through the opening 2d to the gas circulation device 24. The gas jetted from each nozzle box 3 of the lower (other side) nozzle group N2 is also refluxed to the gas circulation device 24 through the opening 2e.

  2 and 5, the nozzle box 3 includes a gas guide plate 17 that is long in the left-right direction, and a pair of front and rear gas ejection slits 18, 18 that are provided at the outer front and rear edges of the gas guide plate 17. have. As shown in FIG. 5, the gas guide plate 17 includes a flat portion 17a serving as a static pressure holding portion, a pair of front and rear Coanda portions 17b and 17b formed by bending at the front and rear edges of the flat portion 17a, and Coanda portions 17b and 17b. A pair of front and rear skirts 17c, 17c extending from the front are formed. The gas ejection slits 18, 18 are opened so that the outer surfaces of the skirts 17c, 17c serve as gas G guide surfaces. The gas G ejected from the gas ejection slits 18 and 18 is guided by the skirt portions 17c and 17c to reach the Coanda portions 17b and 17b. The Coanda portions 17b and 17b change the direction to the flat portion 17a due to the Coanda effect. Between the web W traveling on the R and the flat portion 17a, a positive static pressure larger than the static pressure of the gas in the chamber 2b is generated on the plus side, and the web W is sprayed away from the flat portion 17a. The web W travels while floating while being supported so as to draw a wave curve by a cushioning support action of positive static pressure generated between each nozzle box 3 and the flat portion 17a. The nozzle box 3 is not limited to the above structure, and can be changed as appropriate.

  As shown in FIG. 10, two sets of gas circulation devices 24, 24 are connected to each drying chamber 2a of the floating drying device 2. Each set of the gas circulation devices 24 is disposed on the upstream side of the circulation passage 26 and the circulation passage 26 that allows the air supply duct 19 (or 20) of the drying chamber 2a to communicate with the opening 2d (or 2e) of the drying chamber 2a. A circulation fan 27, a heater 28 made of a steam heater or an electric heater disposed on the downstream side of the circulation passage 26, and a fresh gas intake device 29 with a damper for adjusting the air volume connected to the upstream side of the circulation passage 26. The exhaust passage 30 with the air volume adjusting damper is joined upstream of the fresh gas intake 29 in the circulation passage 26. Each gas circulation device 24 sucks and circulates the gas leaving the web W after the web W passing through the drying chamber 2b is lifted from the opening 2d (or 2e) to the circulation passage 26 by the suction force of the circulation fan 27. When heating, the heater 28 is heated to a set temperature, supplied to the air supply duct 19 (or 20) of the drying chamber 2a, and gas is supplied from each nozzle box 3 of the nozzle group N1 (or N2) toward the web passage R. Is made to erupt. In addition, each gas circulation device 24 draws a part of the gas recirculated from the opening 2d (or 2e) to the exhaust fan 32 of the exhaust device 31 through the exhaust passage 30 and the collective exhaust duct 33, and fresh gas. Fresh gas is taken into the circulation passage 26 from the intake 29, and the solvent vapor concentration of the gas ejected from each nozzle box 3 is set to a set value. The levitation drying equipment 1 of the present example includes two sets of gas circulation devices 24 and 24 for the nozzle group N1 and the nozzle group N2, and the set of gas circulation devices 24 leads to the nozzle groups N1 and N2. It is also possible to supply and circulate a gas having a set temperature.

  As shown in FIGS. 1 to 4 and FIGS. 6 to 10, the meandering correction device 4 includes a web guide device 13, a tilt operation tool 8 for tilting the web guide device 13, and a gas circulation connected to the web guide device 13. Device 25. The web guide device 13 includes a support 16 in which left and right connecting plates 9 and 9 are connected by connecting frames 15 and 15, two guide rolls 6 and 6 attached to the connecting frames 15 and 15 of the support 16, and a suction tool. 5 and a gas blowing tool 7 for wrapping.

  As shown in FIGS. 2, 4 and 6, the two guide rolls 6 and 6 are attached to the connecting frames 15 and 15 via bearings 14 and 14 so as to contact the other surface Rd of the web passage R. It is arranged in parallel with. The two guide rolls 6 and 6 are selected from a range in which the outer peripheral surface 6a has a diameter of about 50 to 150 mm. In addition to the outer peripheral surface 6a being a metal surface, the web W to be wound is prevented from skidding and correcting meandering. In order to ensure execution, the outer peripheral surface of the roll is formed of a rubber layer having a large frictional resistance. Further, the two guide rolls 6 and 6 are a rotatable free roll or a tender roll (forcible roll) for forcibly rotating the shaft portion that pivotally supports the cylindrical portion forming the outer peripheral surface of the roll. Is selected according to the characteristics of the web W.

  As shown in FIGS. 6 and 7, the suction tool 5 is disposed on the opposite side (lower side) of the web path R with respect to the two guide rolls 6, 6, and the outer peripheral surface of the adjacent guide rolls 6, 6. It is comprised so that the clearance gap J formed between 6a and 6a may be made into a suction state. The suction tool 5 is attached to a groove member 44 extending in the longitudinal direction (left-right direction) of the guide rolls 6 and 6 and side plate portions 44a and 44a facing the groove member 44 so as to be able to advance and retreat toward the outer peripheral surface 6a. The front and rear longitudinal seal members 45, 45 having the longitudinal tip portion 45a approaching the outer peripheral surface 6a of the guide roll 6 and the longitudinal inner sides of the groove of the groove member 44 are movably disposed, and the tip portion 46a is guided. Left and right short seal members 46, 46 that are brought close to the outer peripheral surface 6 a of the roll 6, and the recessed groove member 44 is fixedly attached to the front and rear connecting frames 15, 15 via the left and right support members 53, 53. is there. Each support member 53 includes a connection portion 53a installed on the front and rear connection frames 15 and 15 and a bracket 53b joined to the bottom plate portion 44b of the groove member 44. The connection portion 53a and the bracket 53b are connected by screws 53c and 53c. It is joined.

  The suction tool 5 includes two guide rolls, each of which includes a concave groove member 44, front and rear long seal members 45 and 45, and left and right short seal members 46 and 46, and a suction space portion 5a formed inside the groove. The outer peripheral surfaces 6a and 6a are opposed to the web passage R on the outer peripheral surfaces 6a and 6a, and the front end portions 45a and 46a of the long seal members 45 and 45 and the short seal members 46 and 46 are connected to the guide rollers 6 and 6, respectively. It approaches so that it may not contact | abut on the outer peripheral surface 6a, and it is trying not to inhibit the free rotation of the guide roll 6. FIG. The suction tool 5 joins the suction side 34a of the gas circulation device 25 to the suction port 44c opened in the bottom plate portion 44b of the concave groove member 44 via a flexible duct 54, thereby reducing the suction space portion 5a. By suctioning, the gap J between the adjacent guide rolls 6 and 6 communicating with the suction space 5a can be brought into a suction state.

  The gap J between the adjacent guide rolls 6 and 6 is covered with the web W traveling by being guided by the adjacent guide rolls 6 and 6 so that the longitudinal area (left and right areas) thereof is covered. If the gas is sucked from both ends of the gap in the open state, and the opening area on both ends of the gap becomes large, the suction air volume increases and the suction load of the gas circulation device 25 also increases. Therefore, for the adjacent guide rolls 6 and 6, in order to make the opening area of both ends of the gap J as small as possible, the closest dimension of the roll outer peripheral surfaces 6a and 6a may be selected within a range of about 2 to 5 mm.

  As shown in FIG. 7, the suction tool 5 is configured so that the left and right short seal members 46, 46 are connected to the left and right ends of the web W in response to changes in the specifications of the left and right width dimensions. An interval adjusting device 47 is provided so that it can move to the vicinity. The gap adjusting device 47 is supported by a bottom plate portion 44b of the concave groove member 44 so that both ends thereof are rotatably supported 49 and 49, and one screw 48a screwed into one (left side) short seal member 46, and the concave groove member Both end sides are rotatably supported on the bottom plate portion 44b of the shaft 44, and the other screw 48a is screwed into the other (right) short seal member 46. The one screw 48a and the other screw 48a are in a reverse screw relationship. A moving operation screw 48, a shaft joint 50 that connects the one screw 48a and the other screw 48a, an extension bar 51 that extends from the other screw 48b and is pivotally supported by the right connection plate 9, and A rotation operation handle 52 attached to the end portion, and by rotating the handle 52, the movement operation screw 48 is rotated so that both the short seal members 46, 46 are moved closer to or away from each other. .

  The web W that travels in contact with the outer peripheral surfaces 6 a and 6 a of the guide rolls 6 and 6 is drawn into the gap J when straddling the gap J between the adjacent guide rolls 6 and 6 that are in a suction state by the suction tool 5. And pass through a position that balances with the web tension.

  As shown in FIG. 6, the wrapping gas blowing tool 7 generates a gas (for example, air or nitrogen gas) from one surface outer side (upper side) of the web passage R toward one surface Rw of the web passage R. A nozzle box body 7a configured to be sprayed and supplied with gas from a gas circulation device 25 (see FIG. 10) for a meandering correction device via a flexible duct 21, and a web passage from the front and rear sides of the nozzle box body 7a Front and rear nozzles 7b and 7b projecting toward R and an intermediate nozzle 7b projecting between the two guide rolls 6 and 6, and an outlet 7c at the tip of the front and rear nozzles 7b and 7b , 7c and the intermediate nozzle 7b, the web passage R is wound along the circumferential direction of the outer peripheral surface 6a of each guide roll 6 by blowing gas from the outlet 7c at the tip of the intermediate nozzle 7b toward the one surface Rw of the web passage R. Region Rb It is so as to form. In the gas blowing tool 7 for winding, the front nozzle 7b blows gas toward the edge vicinity Rc on the upstream side of the passage in the winding region Rb of the front guide roll 6, and the rear nozzle 7b Gas is blown toward the edge vicinity Rc on the downstream side of the passage in the winding region Rb of the rear guide roll 6, and the intermediate nozzle 7 b is a straddling portion between the guide rolls 6 and 6 in the web passage R. By blowing the gas toward Re, the web W is wound around the outer peripheral surfaces 6a of the guide rolls 6 and 6 while being pressed in the direction of pulling the web W by the pressure (dynamic pressure) of the gas to be blown. As shown in FIGS. 6 and 4, the nozzle box main body 57a has a rectifying tool 57h disposed therein, and gas is blown out uniformly from the respective outlets 57c over the entire area in the left-right direction, so that the web W has a lateral width. It is designed to pull evenly across the entire direction.

  As shown in FIGS. 2 and 3, the meandering correction device 4 is provided with a meandering correction chamber 4a between adjacent drying chambers 2a and 2a, and a partition wall 4c surrounding the room 4b of the meandering correction chamber 4a and each drying unit. The partition wall 2c surrounding the room 2b of the room 2a is joined in an airtight manner. As shown in FIGS. 2 and 4, the support 6 of the meandering correction device 4 has openings 4d and 4d provided at both end sides of the connection frames 15 and 15 in the left and right partition walls 4c of the meandering correction chamber 4a. It is inserted and connected to non-breathable connecting plates 9 and 9 located on the left and right outside the meandering correction chamber 4a. The peripheral edge of the opening 4d and the connecting plate 9 are joined in an airtight manner by a flexible and non-breathable joining tube 10 surrounding the end sides of the connecting frames 15 and 15. As shown in FIG. 1, the meandering correction device 4 is provided with an inspection door 56 and an inspection window 57 at appropriate positions of the partition wall portion 4c.

  2, 4 and 7, the tilt operation tool 8 is disposed outside the meandering correction chamber 4a and can freely rotate the support portion 9a attached to each of the left and right connecting plates 9, 9. Left and right sliders 40, 40 that support the shaft 43 (see FIG. 4 and FIG. 8A), and left and right fixed rails 41, 41 that guide each slider 40, And a driving unit 42 having an actuator such as a hydraulic cylinder or a servo motor that slides one of the left and right sliders 40 (left side in this example). When the mechanism of the meandering correction device 4 is simply shown in FIG. 9, a web guide comprising a support 16, two guide rolls 6, 6, a suction tool 5, and a wrapping gas blowing tool 7. The device 13 is one node (link) L1, the left and right sliders 40, 40 are each one node L2, L3, and the fixed rails 41, 41 are one node L4. The intersection point O of the straight lines M1 and M2 perpendicular to the linear movement directions of the (left slider 40) and the node L3 (right slider 40) is the node L1 (web) that moves relative to the fixed node L4 (rails 41 and 41). It becomes the instantaneous center of the guiding device 13). The meandering correction device 4 positions the instantaneous center O within the range of the web passage R in the left-right width direction, the two guide rolls 6 and 6 of the web guide device 13, the suction tool 5, and the wrapping gas blowing tool. No. 7 can correct meandering in a state where it is difficult to generate wrinkles on the running web W. As shown in FIG. 2, the tilting operation tool 8 monitors the position of the web W in the width direction (for example, the position of the ear end) by a non-contact detector 23 arranged in the chamber 4b of the meandering correction chamber 4a. The meandering of the web W is corrected by starting and stopping the driving unit 42 of the tilting operation tool 8 based on the detection signal of the detector 23. The detector 23 is provided so as to be movable in the left-right direction so as to correspond to the change in the left-right width dimension of the web W, and the detection position can be changed by rotating the operation handle 58 for the detector.

  The meandering correction device 4 includes an opening in the meandering correction chamber 4a in which the left and right connecting plates 9, 9 of the node L1, shown in FIG. The joining cylinder part 10 which joins the peripheral edge of the part 4d and the connecting plate 9, the duct 54 joined to the suction tool 5, and the duct 21 joined to the gas blowing tool 7 for winding are made flexible. is there.

  By the way, the levitation drying equipment 1 of the present invention for drying a coating film applied to one surface of the web W while blowing the gas (hot air) from the nozzle boxes 3 and 3 on both the upper and lower surfaces of the web W to float the web W. As shown in FIG. 5, since there is nothing other than hot air as heat transfer to the web W, the wet bulb temperature of the solvent at which the temperature value T2 of the web W evaporates from the coating film (when the thermometer is moistened with the solvent) The temperature value T1 of the gas (hot air) G ejected from the nozzle box 3 is increased as compared with the drying method in which hot air is blown onto the coating film while the web W is in contact with the guide roll and heat is transferred to the guide roll. It becomes possible. The room 2b of the drying room 2a is filled with hot air separated from the web W after being blown from the nozzle box 3 onto the web W, so that the room temperature T3 is slightly lower than the gas (hot air) temperature value T1. If the gas at the room temperature T3 in the chamber 2b of the drying chamber 2a shown in FIG. 3 flows out into the chamber 4b of the meandering correction chamber 4a and fills the meandering correction chamber 4b, the two guide rolls 6, 6 The temperature value of the web W is considerably higher than the temperature value T2 of the web W immediately after leaving the drying chamber 2a, and the web W that is in contact with the high-temperature guide rolls 6 and 6 is subjected to damage such as thermal shrinkage. is there. Therefore, the levitation drying equipment 1 of the present invention includes a gas circulation device 25 for preventing the web W from being heated by the two guide rolls 6 and 6.

  As shown in FIG. 10, the gas circulation device 25 for the meandering correction device 4 includes a circulation passage 34 that connects the chamber 4 b of the meandering correction chamber 4 and the suction tool 5 with the wrapping gas blowing tool 7, and a circulation passage. A circulation fan 35 disposed on the upstream side of the circulation passage 34, a heater 36 with a temperature regulator disposed on the downstream side of the circulation passage 35, an exhaust passage 38 with a damper for adjusting the air volume joined to the circulation passage 34, and the circulation passage 34. And a fresh gas intake device 37 with a damper for adjusting the air volume provided downstream of the exhaust passage 38 in the exhaust passage 38, and a suction space portion 5a (see FIG. 6) and the meandering correction chamber 4b, and the air supply side 34b, which is the downstream side of the circulation passage 34, is placed inside the nozzle box body 7a (see FIG. 6) of the gas blowing tool 7 for winding. Communicated. The gas circulation device 25 adjusts the temperature of the heater 36 to control the temperature value T4 (see FIG. 6) of the gas G blown from each nozzle 7b of the wrapping gas spraying tool 7, thereby causing a meandering correction chamber. The temperature of the gas around the two guide rolls 6 and 6 in the four chambers 4b can be made equal to or lower than the temperature value T2 of the web W sent out from the drying chamber 2a. In the gas circulation device 25, a temperature sensor 39 (see FIG. 6) is disposed in the vicinity of the outer peripheral surface around which the web of either one or both of the two guide rolls 6 and 6 is not wound, and the temperature sensor 39 detects the temperature. The temperature of the heater 36 is adjusted so that the temperature value (temperature value of the guide roll outer peripheral surface 6a) approaches the temperature value T2 without exceeding the temperature value T2 of the web W sent out from the drying chamber 2a. The temperature value T2 of the web W entering the meandering correction chamber 4b may be detected by a non-contact temperature sensor (not shown) arranged in the meandering correction chamber 4b. The gas circulation device 25 corrects the meander by adjusting the damper opening degrees of the exhaust path 38 and the fresh gas intake 37 so that the gas in the room 2b of the drying chamber 2a does not flow into the room 4b of the meandering correction chamber 4. The static pressure of the gas in the chamber 4b of the chamber 4 is equal to or slightly higher than the static pressure of the gas in the chambers 2b of the adjacent drying chambers 2a and 2a, and the gas in the drying chamber 2b flows into the meandering correction chamber 4b. By blocking, it is ensured that the gas around the two guide rolls 6 and 6 is kept at a temperature value T2 or less. Further, the gas circulation device 25 is configured not to fill the meandering correction chamber 4b with a solvent vapor having a predetermined concentration or more by adjusting the damper opening degrees of the exhaust passage 38 and the fresh gas intake device 37.

  As shown in FIG. 8, the levitation drying apparatus 1 of the present invention tilts the web guide device 13 including the two guide rolls 6, 6 of the meandering correction device 4, the suction tool 5, and the wrapping gas blowing tool 7. 8, when the web W is not meandering as shown in FIG. (A), the web guide device 13 is maintained in the stopped state without moving in the left-right direction, and as shown in FIG. When the web W meanders to the left side, the meandering correction is performed by tilting the web guide device 13 at the tilt angle β1 so that the right side of the web guide device 13 moves in the front right direction (the left side is the rear right direction). As shown, when the web W meanders to the right side, the meandering correction is performed by tilting the web guide device 13 at the tilt angle β2 so that the right side moves in the rear left direction (the left side is the front left direction). Note that the tilt angles β1 and β2 indicate the crossing angle between the horizontal direction E of the levitation drying equipment 1 of the present invention and the rotation center line D of the guide roll 6, and change according to the degree of meandering of the web W.

  When the web W traveling in the web passage R of the levitation drying equipment 1 of the present invention passes through the drying chamber 2a on the upstream side (front side) of the web passage and reaches the meander correction device 4, as shown in FIGS. The correction device 4 is guided while being wound around the winding regions Rb, Rb of the two guide rolls 6, 6 and travels toward the drying chamber 2 a on the downstream side (rear side) of the web passage. The web W is wound around the winding regions Rb and Rb of the two guide rolls 6 and 6 so as to straddle the gap J between the adjacent guide rolls 6 and 6 that are sucked by the suction tool 5. W is pulled so as to be drawn into the gap J in the suction state, and the upstream and downstream of the passage in the winding regions Rb, Rb of the front and rear guide rolls 6, 6 from the front and rear nozzles 7b, 7b of the winding gas blowing tool 7. The web W is pressed in the pulling direction by the pressure (dynamic pressure) of the gas blown toward the edges Rc, Rc near the side edge and the gas blown from the intermediate nozzle 7b toward the straddling point Re in the web passage R. It depends. The web W that travels while being wound around the winding regions Rb, Rb of the two guide rolls 6, 6 is pressed onto the outer peripheral surface 6a of each guide roll 6 according to the web tension value. Side-slip in the left-right direction on the outer peripheral surface of each guide roll 6 is prevented, and the guide rolls 6 and 6 are moved together with the guide rolls 6 and 6 which are tilted when correcting meandering.

  In the present embodiment, as shown in FIG. 3, the flotation drying equipment 1 of the present invention has adjacent drying chambers 2 a and 2 a arranged along the web passage R between the nozzle boxes 3 on one side and the other side of each drying chamber 2 a. The extending virtual plane P is horizontal and the two virtual planes P and P are continuous so as to be the same plane. However, the present invention is not limited to this. In some cases, the drying chambers 2a, 2a adjacent to each other are inclined so as to be inclined.

  The web guiding device 13 of the meandering correction device 4 can be changed as shown in FIGS.

  The web guiding device 13 of the meandering correction device 4 shown in FIG. 11 includes a wrapping gas blowing tool 7 that presses the web W onto the outer peripheral surfaces 6a of the two guide rolls 6 and 6 with a static pressure of gas. Yes. The winding gas blowing tool 7 includes a gas guide surface portion 7d facing the two guide rolls 6 and 6 through the web passage R, and Coanda portions 7e bent at both front and rear edges of the gas guide surface portion 7d. 7e, a pair of front and rear skirt portions 7f, 7f extending from the Coanda portions 7e, 7e, and outlets 7c, 7c facing the Coanda portions 7e, 7e are formed in the nozzle box body 7a. The front outlet 7c blows gas toward the upstream edge portion Rc in the winding region Rb of the web passage R in contact with the guide roll 6 on the upstream side (front side) of the passage, and the rear outlet 7c. Is configured to blow gas toward the downstream edge portion Rc in the winding region Rb of the web passage R in contact with the guide roll 6 on the downstream side (rear side) of the passage. The winding gas blowing tool 7 changes its direction so that the gas blown from the blowout ports 57c, 57c on both sides is directed to the gas guide surface part 7d by the Coanda effect of each Coanda part 57e, and the web W and the gas that travels. A larger positive static pressure is generated between the guide surface portion 7d on the plus side than the static pressure on the other surface Rd side of the web passage R, and the web W is moved to each of the two guide rolls 6 and 6 by this plus static pressure. The web W can be surely guided without being caused to slide on the guide roll 6 by being crimped to the outer peripheral surface 6a. Note that the wrapping gas blowing tool 7 has a plurality of blowing holes 7j for blowing gas toward the space between the adjacent guide rolls 6 and 6 in the gas guide surface portion 7d, and the adjacent guide rolls 6 and 6 are opened. It is also possible to increase the winding length dimension of the web W with respect to the outer peripheral surface of the guide roll 6 by blowing gas onto the web W straddling 6. In FIG. 11, the configuration other than the wrapping gas blowing tool 7 is substantially the same as the configuration shown in FIG. 6, and the same reference numerals indicate the same components and the like.

  In addition to forming the gas guide surface portion 7d flat as shown in FIG. 11, the winding gas blowing tool 7 of the meandering correction device 4 is formed by bending the gas guide surface portion 7d as shown in FIG. By making the distance between 7d and the outer peripheral surface 6a of each guide roll 6 substantially constant, the gas guide surface portion 7d can be brought close to the outer peripheral surface 6a of each guide roll 6, and the entire front and rear sides of the gas guide surface portion 7d and the web W In some cases, a large positive static pressure is generated between the guide rolls 6 and the webs W are surely pressure-bonded to the outer peripheral surfaces 6 a of the respective guide rolls 6.

  The web guide device 13 of the meandering correction device 4 shown in FIG. 13 includes three guide rolls 6, 6, 6 arranged in parallel so as to contact the other surface Rd of the web passage R, and these guide rolls 6. The suction tool 5 is disposed on the opposite side of the web path R and brings the two gaps J, J between the adjacent guide rolls 6 and 6 into the suction state, and the web path R from the outer side (upper side) of the web path R. A gas is blown toward the one surface Rw of the web, and a winding region Rb along the outer peripheral surface 6a of the guide roll 6 is formed in the web passage R so that the winding gas blowing tool 7 is brought into non-contact with the web passage R. I have. The winding gas spraying tool 7 has an intermediate nozzle 7b increased by an amount corresponding to the increase in the guide roll 6 as compared with the winding gas spraying tool 7 shown in FIG. Although not shown in the figure, the web guide device 13 has four or more guide rolls 6 and sucks the gaps J at (n−1) places with the suction tool 5 to obtain (n + 1) pieces. It is also possible to provide a nozzle 7b.

  The web guide device 13 of the meander correcting device 4 shown in FIG. 14 has three guide rolls 6 as compared to the meander correcting device 4 shown in FIG. The gaps J, J are brought into a suction state by the suction tool 5, the front and rear lengths of the gas guide surface part 7 d of the gas blowing tool 7 for winding are increased by the increase of the guide roll 6, and the running web W and the gas guide surface part The web W is pressed against the outer peripheral surfaces 6a of the three guide rolls 6, 6 and 6 with a positive static pressure generated during 7d. Although the web guide device 13 is not shown in the figure, the guide roll 6 is made into four or more n, and the gap J at n−1 places is sucked by the suction tool 5 and only the increment of the guide roll 6 is obtained. It is also possible to lengthen the front-rear length of the gas guide surface portion 7d of the gas blowing tool 7 for winding.

  In addition to forming the gas guide surface portion 7d flat as shown in FIG. 14, the winding gas blowing tool 7 of the meandering correction device 4 is formed by bending the gas guide surface portion 7d as shown in FIG. By making the distance between 7d and the outer peripheral surface 6a of each guide roll 6 substantially constant, the gas guide surface portion 7d can be brought close to the outer peripheral surface 6a of each guide roll 6, and the entire front and rear sides of the gas guide surface portion 7d and the web W In some cases, a large positive static pressure is generated between the guide rolls 6 and the webs W are surely pressure-bonded to the outer peripheral surfaces 6 a of the respective guide rolls 6.

  As shown in FIG. 3, the levitation drying equipment 1 is blown from the nozzle box 3 of the drying chamber 2a and travels through the web passage R to correct the meandering of the web passing through the drying chamber 2a. Since no change is caused in the movement state of the gas passing through the surface of the film, it is possible to maintain the uniformity of the dry state in the width direction of the coating film and to pass through the meander correcting device 4 as shown in FIGS. Since there is no contact between the coated surface side of the web W and the meandering correction device 4, defects such as scratches are not generated in the coating film. Moreover, since the interior 4b of the meandering correction chamber 4a is airtightly surrounded by the partition wall portion 4c, the connecting plate 9 and the joining cylinder portion 10 of the meandering correction chamber 4a, The gas moved from the room 2b to the room 4b of the meandering correction room 4a is not leaked to the outside, and the working environment outside the drying room 2a and the meandering correction room 4a is not deteriorated.

  Furthermore, the levitation drying equipment 1 of the present invention does not exceed the temperature value T2 of the web W sent from the drying chamber 2a because the temperature value of the outer peripheral surface 6a of each guide roll 6 in the chamber 4b of the meandering correction chamber 4a does not exceed. The web W is not abnormally heated by the guide roll 6 in contact with the W, and the web W is not damaged such as thermal contraction due to heating.

(Second Embodiment)
The present invention levitation drying equipment 61 according to the second embodiment shown in FIG. 16 is that the arrangement of the drying chambers 2a, 2 adjacent to each other via the meandering correction device 4 is inclined downward from the front side to the rear side. The arrangement of the adjacent drying chambers 2a, 2 is greatly different from that of the first embodiment (see FIG. 3) in which the arrangement of the drying chambers 2a, 2 is straight from the front side to the rear side, and other parts are substantially the same as those of the first embodiment. In FIG. 16, the same reference numerals as those in FIGS. 1 to 10 denote corresponding parts.

  The levitation drying equipment 61 of the present example is such that the adjacent drying chambers 2a, 2a via the meandering correction device 4 are connected between the nozzle box 3 on one side and the nozzle box 3 on the other side of each drying chamber 2a. For the virtual plane P extending along R, the virtual planes P and P intersect each other at an intersection angle θ (for example, an angle selected in the range of 1 to 30 degrees). In addition, the levitation drying equipment 61 of this example can change the web guide device 13 of the meandering correction device 4 to any one of the web guide devices 13 shown in FIGS. 11 to 15.

  The flotation drying equipment 61 of the present embodiment can connect the adjacent drying chambers 2a, 2 in a refracted state by crossing the virtual planes P, P of the adjacent drying chambers 2a, 2 to each other. The arrangement of the drying chambers 2a and 2a can be made to correspond to the prevention of W edge curl or the internal structure of the building.

(Third embodiment)
The present invention levitation drying equipment 71 according to the third embodiment shown in FIG. 17 is that the arrangement of the drying chambers 2a, 2a adjacent to each other via the meandering correction device 4 is inclined upward from the front side to the rear side. The arrangement of the adjacent drying chambers 2a, 2 is greatly different from that of the first embodiment (see FIG. 3) in which the arrangement of the drying chambers 2a, 2 is straight from the front side to the rear side, and other parts are substantially the same as those of the first embodiment. In FIG. 17, the same reference numerals as those in FIGS. 1 to 10 denote corresponding parts.

  In this example, the levitation drying equipment 71 of the present invention is such that the adjacent drying chambers 2a, 2a via the meandering correction device 4 have a web passage between the nozzle box 3 on one side and the nozzle box 3 on the other side of each drying chamber 2a. For the virtual plane P extending along R, the virtual planes P and P intersect each other at an intersection angle θ (for example, an angle selected in the range of 1 to 30 degrees). In addition, the levitation drying equipment 61 of this example can change the web guide device 13 of the meandering correction device 4 to any one of the web guide devices 13 shown in FIGS. 11 to 15.

  The levitation drying equipment 71 of the present example can connect the adjacent drying chambers 2a, 2 in a refracted state by crossing the virtual planes P, P of the adjacent drying chambers 2a, 2 to each other. The arrangement of the drying chambers 2a and 2a can be made to correspond to the prevention of W edge curl or the internal structure of the building.

(Fourth embodiment)
18 to 20 show the levitation drying equipment 81 of the present invention according to the fourth embodiment, and the levitation drying equipment 81 of the present example is the levitation drying of the present invention according to the first embodiment. The web guide device 83 of the meandering correction device 4 is greatly different from the equipment 1 (FIGS. 1 to 10). The web guide device 83 connects the left and right connecting plates 9 and 9 to the connecting frames 15 and 15 without providing the winding gas blowing tool 7 (see FIG. 6) of the web guide device 13 according to the first embodiment. And the two guide rolls 6 and 6 attached to the connection frames 15 and 15 of the support 16 and the suction tool 5.

  As shown in FIG. 18, the flotation drying equipment 81 of the present example extends in the front-rear direction, and is provided on one side on both sides of the web passage R where one surface Rw is the coating surface side and the other surface Rd is the non-coating surface side. And a flotation drying device 2 in which two drying chambers 2a for blowing gas from the nozzle box 3 on the other side are adjacent to each other, and a meander correction device 4 disposed between the adjacent drying chambers 2a and 2a, and meander correction A plurality of guide rolls 6 arranged in parallel so that the apparatus 4 contacts the other surface Rd of the web passage R shown in FIG. 20 (FIG. (A) shows the case of two, and FIG. (B) Shows a case of three), and a suction tool 5 which is disposed on the opposite side of the web passage R with respect to these guide rolls 6 and sucks a gap between adjacent guide rolls 6 and 6, and these guides Tilt operation tool 8 for tilting the roll 6 and the suction tool 5 with respect to the left-right direction. And a see FIG. 19) and.

  The contents of the guide roll 6, the suction tool 5 and the support tool 16 constituting the web guide device 83 are substantially the same as those of the guide roll 6, the suction tool 5 and the support tool 16 according to the first embodiment. The description here is omitted.

  As shown in FIG. 18, the gas circulation device 25 for the meandering correction device 4 includes a circulation passage 34 that connects the chamber 4 b of the meandering correction chamber 4 and the suction tool 5, and a circulation fan 35 disposed upstream of the circulation passage 34. A heater 36 with a temperature controller disposed downstream of the circulation passage 35, an exhaust passage 38 with a damper for adjusting the air volume joined to the circulation passage 25, and a downstream side of the exhaust passage 38 in the circulation passage 34. And a fresh gas intake device 37 with a damper for adjusting the air volume, and an intake side 34a, which is upstream of the circulation passage 34, communicates with the suction space 5a (see FIG. 20) of the suction device 5, and the downstream side of the circulation passage 34 The air supply side 34b is communicated with the meandering correction chamber 4b. The gas circulation device 25 adjusts the temperature of the heater 36 to control the temperature value T4 of the gas supplied to the meandering correction chamber 4b, whereby the gas around the two guide rolls 6 and 6 in the meandering correction chamber 4b. Is set to be equal to or lower than the temperature value T2 of the web W delivered from the drying chamber 2a. In the gas circulation device 25, a temperature sensor 39 is disposed in the vicinity of the outer peripheral surface where the web is not wound on one or both of the two guide rolls 6 and 6, and the temperature value detected by the temperature sensor 39 (guide roll) The temperature of the heater 36 is adjusted so that the temperature value of the outer peripheral surface 6a) approaches the temperature value T2 without exceeding the temperature value T2 of the web W delivered from the drying chamber 2a. The temperature value T2 of the web W entering the meandering correction chamber 4b may be detected by a non-contact temperature sensor (not shown) arranged in the meandering correction chamber 4b. The gas circulation device 25 corrects the meander by adjusting the damper opening degrees of the exhaust path 38 and the fresh gas intake 37 so that the gas in the room 2b of the drying chamber 2a does not flow into the room 4b of the meandering correction chamber 4. The static pressure of the gas in the chamber 4b of the chamber 4 is equal to or slightly higher than the static pressure of the gas in the chambers 2b of the adjacent drying chambers 2a and 2a, and the gas in the drying chamber 2b flows into the meandering correction chamber 4b. By blocking, it is ensured that the gas around the two guide rolls 6 and 6 is kept at a temperature value T2 or less. Further, the gas circulation device 25 is configured not to fill the meandering correction chamber 4b with a solvent vapor having a predetermined concentration or more by adjusting the damper opening degrees of the exhaust passage 38 and the fresh gas intake device 37.

  When the web flotation drying apparatus 81 corrects the meandering of the web passing through the drying chamber 2a by traveling through the web passage R, the web W is blown from the nozzle box 3 of the drying chamber 2a as shown in FIG. Therefore, the uniformity of the dry state in the width direction of the coating film can be maintained and the web W passing through the web guide device 83 of the meandering correction device 4 can be maintained. Since there is no contact between the coating surface side and the web guide device 83, the coating film does not cause defects such as scratches. Further, as shown in FIG. 19, the levitation drying equipment 81 of the present invention has a chamber 4b of a meandering correction chamber 4a surrounded by a partition wall portion 4c, a connecting plate 9 and a joining cylinder portion 10 of the meandering correction chamber 4a in an airtight manner. Therefore, the gas moved from the room 2b of the drying room 2a to the room 4b of the meandering correction room 4a is not leaked to the outside, and the working environment outside the drying room 2a and the meandering correction room 4a is not deteriorated.

  Further, the levitation drying equipment 81 of the present invention does not exceed the temperature value T2 of the web W sent from the drying chamber 2a because the temperature value of the outer peripheral surface 6a of each guide roll 6 in the chamber 4b of the meandering correction chamber 4a does not exceed. The web W is not abnormally heated by the guide roll 6 in contact with the W, and the web W is not damaged such as thermal contraction due to heating.

(Other embodiments)
The levitation drying equipment of the present invention includes the levitation drying equipment 61 of the present invention shown in FIG. 16 and the web guide device 13 of each meander correcting device 4 of the levitation drying equipment 71 of FIG. Substitution is also possible. The gas circulation device 25 in the case of replacing with the web guide device 83 causes the suction side 34a of the circulation passage 34 to communicate with the suction tool 5 and meanders the air supply side 34b as in the fourth embodiment shown in FIG. It is preferable to communicate with the correction chamber 4b.

DESCRIPTION OF SYMBOLS 1 (61,71,81) ... this invention drying equipment, 2 ... floating drying apparatus, 2a ... drying chamber, 2b ... indoor, 2c ... partition wall part, 2d ... opening part, 2e ... opening part, 3 ... nozzle box, DESCRIPTION OF SYMBOLS 4 ... Meander correction apparatus, 4a ... Meander correction chamber, 4b ... Indoor, 4c ... Partition wall part, 4d ... Opening part, 5 ... Suction tool, 5a ... Suction space part, 6 ... Guide roll, 6a ... Outer peripheral surface, 7 ... Gas blowing tool for winding, 7a ... Nozzle box body, 7b ... Nozzle, 7c ... Air outlet, 7d ... Gas guide surface part, 7e ... Coanda part, 7f ... Bottom part, 7h ... Rectifier, 7i ... Support frame, 7j DESCRIPTION OF SYMBOLS ... Blowout hole, 8 ... Tilt operation tool, 9 ... Connecting plate, 9a ... Support part, 10 ... Joining cylinder part, 11 ... Rising support frame, 11a ... Peep opening part, 12 ... Support leg, 13 ... Web guide apparatus, 14 ... Bearing (for guide roll 6), 15 ... Connection frame, 16 ... Support, 17 ... Air Guide plate, 17a ... flat part, 17b ... bottom part, 17c ... Coanda part, 18 ... gas ejection slit, 19 ... air supply duct, 20 ... air supply duct, 21 ... (flexible) duct, 23 ... detector, 24 ... Gas circulation device (for floating drying device), 25 ... Gas circulation device (for meandering correction device), 26 ... Circulation passage, 27 ... Circulation fan, 28 ... Heater, 29 ... Fresh gas intake, 30 ... Exhaust passage 31 ... Exhaust device, 32 ... Exhaust fan, 33 ... Collecting exhaust duct, 34 ... Circulating passage, 34a ... Intake side, 34b ... Inlet side, 35 ... Circulating fan, 36 ... Heater, 37 ... Fresh gas intake device, 38 ... exhaust path, 39 ... temperature sensor, 40 ... slider, 41 ... rail, 42 ... prime mover, 43 ... shaft support, 44 ... groove member, 44a ... side plate, 44b ... bottom plate, 44c ... suction port, 45 ... longitudinal seal member, 46 ... short Seal member 47... Spacing adjustment device 48... Screw for movement operation, 48 a... One screw, 48 b... Screw on the other hand 49. Support member, 53a ... connecting part, 53b ... bracket, 53c ... screw, 53d ..., 54 ... (flexible) duct, 56 ... inspection door, 57 ... inspection window, 58 ... detector operation handle, 83 ... web guide device , D ... rotation center line of the guide roll 6, E ... left-right direction of the equipment, G ... gas, J ... gap, L1 ... node (5, 6, 7, 16), L2 ... node (40), L3 ... node ( 40), L4 ... nodes (41, 41), M1, M2 ... straight line for obtaining the instantaneous center O, N1 ... nozzle group (upper side on one side), N2 ... nozzle group (lower side on the other side), O ... Intersection (instant center), P ... virtual plane, R ... web passage, Rb ... winding Area, Rc ... edge vicinity, Rd ... other side (non-coating surface side), Re ... straddling location, Rw ... one side (coating surface side), S ... dimension of the interval between adjacent nozzles, T1 ... Temperature value of gas blown by the nozzle box 3, T2 ... Web temperature value, T3 ... Temperature value of the drying chamber 2b, T4 ... Temperature value of gas blown by the gas blowing tool 7 for winding, W ... Web, θ ... Crossing angle , Β1, β2 ... Tilt angle

Claims (9)

A flotation that extends in the front-rear direction and that adjoins two drying chambers that blow gas from the nozzle box on one side and the other side on both sides of the web passage where one side is the coated side and the other side is the uncoated side A flotation drying facility with a meandering correction device comprising a drying device and a meandering correction device arranged between adjacent drying chambers,
The meandering correction device is disposed on the opposite side of the web path with respect to the plurality of guide rolls arranged in parallel so as to contact the other surface of the web path, and sucks the gap between the adjacent guide rolls. The suction tool to be brought into a state, and gas is blown from one outer surface of the web passage toward one surface of the web passage to form a winding region along the outer peripheral surface of the guide roll in the web passage so as not to contact the web passage. A gas blowing tool for winding;
A levitation drying apparatus with a meandering correction device, comprising: a tilting operation tool for tilting the guide roll, the suction tool, and the wrapping gas blowing tool with respect to the left-right direction. The blowing gas blowing tool blows gas toward the upstream side edge portion in the winding region of the web passage that contacts the guide roll on the upstream side of the passage, and the web that contacts the guide roll on the downstream side of the passage The meander according to claim 1, further comprising: a blowout port that blows gas toward a position near the downstream edge in the winding region of the passage, and an intermediate blowout port that blows gas between adjacent guide rolls. Flotation drying equipment with correction device. The blowing gas blowing tool blows gas toward the upstream side edge portion in the winding region of the web passage that contacts the guide roll on the upstream side of the passage, and the web that contacts the guide roll on the downstream side of the passage A blowout port for blowing gas toward the vicinity of the downstream edge in the winding region of the passage, and a gas guide surface portion facing these guide rolls through the web passage, and bent at both edges of the gas guide surface portion. The levitation drying equipment with a meandering correction device according to claim 1, wherein each of the Coanda portions faces an outlet. The meandering correction device is provided with a meandering correction chamber between adjacent drying chambers,
The partition wall that surrounds the inside of the meandering correction chamber is joined in an airtight manner to the partition wall that surrounds the interior of each drying chamber,
The left and right end sides of the meandering correction device are connected to a non-breathable connecting plate disposed outside the meandering correction chamber through the opening provided in the partition wall portion of the meandering correction chamber,
The peripheral edge of these openings and the connecting plate are joined in an airtight manner with flexible and non-breathable joining cylinders surrounding the left and right ends of the meandering correction device,
The levitation drying equipment with a meandering correction device according to any one of claims 1 to 3, wherein the tilt operation tool is connected to the connecting plate outside the meandering correction chamber. A circulation passage that joins the air supply side to the winding gas blowing tool and joins the intake side to the inside of the meandering correction chamber and the suction tool, a circulation fan disposed in the circulation passage, and a heater with a temperature controller And an air circulation device having an air flow adjusting damper exhaust passage joined to the circulation passage,
The meandering correction device according to claim 4, wherein the temperature of the gas around the guide roll in the meandering correction chamber can be made equal to or lower than the temperature value of the web delivered from the drying chamber by adjusting the temperature of the heater. Flotation drying equipment. A flotation that extends in the front-rear direction and that adjoins two drying chambers that blow gas from the nozzle box on one side and the other side on both sides of the web passage where one side is the coated side and the other side is the uncoated side A flotation drying facility with a meandering correction device comprising a drying device and a meandering correction device arranged between adjacent drying chambers,
The meandering correction device is disposed on the opposite side of the web path with respect to the plurality of guide rolls arranged in parallel so as to contact the other surface of the web path, and sucks the gap between the adjacent guide rolls. A levitation drying apparatus with a meandering correction device, comprising: a suction tool to be in a state; and a tilting operation tool for tilting the guide roll and the suction tool with respect to the left-right direction. The meandering correction device is provided with a meandering correction chamber between adjacent drying chambers,
The partition wall that surrounds the inside of the meandering correction chamber is joined in an airtight manner to the partition wall that surrounds the interior of each drying chamber,
The left and right end sides of the meandering correction device are connected to a non-breathable connecting plate disposed outside the meandering correction chamber through the opening provided in the partition wall portion of the meandering correction chamber,
The peripheral edge of these openings and the connecting plate are joined in an airtight manner with flexible and non-breathable joining cylinders surrounding the left and right ends of the meandering correction device,
The levitation drying equipment with a meandering correction device according to claim 6, wherein the tilt operation tool is connected to the connecting plate outside the meandering correction chamber. A circulation passage for joining the suction side to the suction tool and joining the air supply side to the inside of the meandering correction chamber, a heater with a circulation fan and a temperature controller arranged in the circulation passage, and an air volume joined to the circulation passage A gas circulation device having an exhaust path with a damper for adjustment,
8. The meandering correction device according to claim 7, wherein the temperature of the gas around the guide roll in the meandering correction chamber is adjusted to be equal to or lower than the temperature value of the web fed from the drying chamber by adjusting the temperature of the heater. Flotation drying equipment. The adjacent drying chamber crosses the virtual planes with respect to a virtual plane extending along the web passage between the nozzle boxes on one side and the other side of each drying chamber. Levitation drying equipment with meandering correction device.

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