JP7438248B2 - Conveyance roller of drying oven - Google Patents

Description

The present invention relates to a conveyance roller that continuously conveys a sheet-like member in a heating furnace.

In the process of applying a coating liquid to one side of a flexible sheet-like member and transporting the sheet-like member coated with the coating liquid containing a resin component in a drying chamber using a transport (support) roller, A drying oven has been proposed that continuously dries a coating liquid applied to a sheet-like member by heating. For example, the drying device described in Patent Document 1 is such a drying device.

One type of conveyance roller used in the drying oven described above is a metal roller made of stainless steel tube, for example, with a supporting shaft made of metal, for example steel, and a smooth roll plating layer formed by chrome plating on the outer peripheral surface. and a pair of set collars made of metal, each of which is fixed by welding to both ends of a metal roller with the support shaft inserted therethrough.

Japanese Patent Application Publication No. 2012-047401

By the way, the above-mentioned conveyance roller needs to be replaced periodically because of scratches caused by contact with the laminated sheet, erosion caused by the solvent component of the coating liquid on the chrome plating of the metal roller, peeling of the plating, accumulation of dirt, etc. It is. However, with the conventional support rollers described above, the metal roller is moved away from the support shaft due to the effects of thermal expansion and contraction due to repeated temperature rises and falls associated with drying processing work, and the accumulation of coating liquid that adheres to the support shaft. The metal roller could not be removed, making it difficult to replace the metal roller.

The present invention was made against the background of the above-mentioned circumstances, and its purpose is to provide a drying oven in which the support shaft and the metal roller can be easily separated and the metal roller can be easily replaced. An object of the present invention is to provide a conveyance roller.

As a result of various studies to solve the above-mentioned problems, the inventor of the present invention has developed a system in which the support shaft does not pass through the metal roller, but is kept concentric with the end surface of the roller using a spigot structure. It has been found that by removably fixing the support shaft with a flange structure, the support shaft and the metal roller can be easily separated, and the metal roller can be easily replaced. The present invention has been made based on this knowledge.

That is, the gist of the first invention is (a) a conveyance roller of a drying oven for conveying a sheet-like member while drying it in the drying oven, and (b) a conveyance roller rotatable by a pair of support members. (c) a pair of support shafts that are supported and arranged concentrically and spaced apart in the axial direction, and each of which has a pair of opposing shaft-side flanges fixed to the shaft ends; (d) a pair of roller side flanges removably fastened to the pair of shaft side flanges; (d) a metal roller fixedly attached to both ends; and (e) a fitting protrusion formed on the other of the shaft-side flange and the roller-side flange, and the fitting protrusion is fitted to align the pair of support shafts and the roller with respect to each other. (f) the pair of support members are fixed on the frame via struts fastened to the frame by screwing bolts; (g) the support shaft is fixed to the support shaft; a large-diameter shaft portion to which a side flange is fixed; and a small-diameter shaft portion that penetrates the furnace wall of the drying furnace following the large-diameter shaft portion and is rotatably supported by the support member outside the drying furnace. (h) the distance from the step between the large-diameter shaft portion and the small-diameter shaft portion of the support shaft to the inner wall surface of the furnace wall is set to be longer than the protruding length of the fitting protrusion; It's in being.

The gist of the second invention is that in the first invention, the other of the shaft-side flange and the roller-side flange provided with the fitting hole is fixed to one opening of the support shaft and the metal roller. , an annular collar in which a second fitting hole having the same diameter as the fitting hole and into which the fitting protrusion is fitted is fitted, and the shaft-side flange and the roller provided with the fitting hole are fitted. The other side flange is removably fixed to the collar by screws.

The gist of the third invention is that in the first invention or the second invention, the conveyance roller is provided with a plurality of rollers on a pair of support members provided in parallel to each other in the conveyance direction of the sheet-like member in the drying oven. are spanned in parallel directions so that every other one is at the same first height position and a second height position lower than the first height position, and are driven to rotate in synchronization with each other. The pair of support members have a diameter smaller than the diameter of the plurality of conveyance rollers, and the pair of support members have a diameter higher than the conveyance roller at the first height position among the plurality of conveyance rollers. An anti-pressure roller, which is rotatably supported at a position closer to the conveyance roller at the first position than the conveyance roller at the second height position and is used to press down warping of the sheet-like member, is connected to the plurality of conveyance rollers. The conveyance roller is rotatably provided for each roller, and the conveyance roller is connected to the anti-pressure roller through a speed-increasing gear device, and the anti-pressure roller is rotated at a higher speed than the conveyance roller.
The gist of the fourth invention is that in the invention according to any one of the first to third inventions, the drying oven emits infrared rays or far infrared rays facing the sheet-like member conveyed by the conveyance roller. The present invention includes a heater support member to which a plurality of heaters that heat the sheet-like member by radiating radiation are fixed.

According to the conveyance roller of the drying oven of the first invention, the pair of shaft-side flanges fixed to the shaft ends of the pair of support shafts and the roller-side flanges fixed to both ends of the metal roller are removably connected. A fitting protrusion protruding from the center of one of the shaft-side flange and roller-side flange is fitted into a fitting hole formed in the other of the shaft-side flange and roller-side flange. While the pair of support members are being extended out, the pair of support members are fixed on the frame via struts that are fastened to the frame by screwing with bolts, and the support shaft is a large shaft to which the shaft side flange is fixed. It integrally includes a diameter shaft portion and a small diameter shaft portion that penetrates the furnace wall of the drying furnace following the large diameter shaft portion and is rotatably supported by the support member outside the drying furnace, and the support member Since the distance from the step between the large-diameter shaft portion and the small-diameter shaft portion of the shaft to the inner wall surface of the furnace wall is set longer than the protrusion length of the fitting protrusion, the pair of support shafts and the metal roller can be easily separated, and the metal roller can be easily replaced.

According to the conveyance roller for a drying oven according to the second aspect of the invention, an annular collar having a second fitting hole having the same diameter as the fitting hole is fitted into one opening of the support shaft and the metal roller. Since the other of the shaft side flange and the roller side flange is removably fixed to the collar with a screw, there is an advantage that the roller side flange can be reused when replacing the metal roller.

According to the conveyance roller of the drying oven of the third aspect, the diameter is smaller than the diameter of the plurality of conveyance rollers, and is higher than the conveyance roller at the first height position among the plurality of conveyance rollers. The plurality of anti-pressure rollers are rotatably supported at a position closer to the conveyance roller at the first position than the conveyance roller at the second height position and are used to press down warping of the sheet-like member. The conveyance roller is rotatably provided for each conveyance roller, and the conveyance roller is connected to the anti-pressure roller via a speed-increasing gear device, and the anti-pressure roller is connected to the anti-pressure roller such that the circumferential speed of the anti-pressure roller is the same as that of the conveyance roller. Similarly, it is driven to rotate at a higher speed than the previous conveyance roller. As a result, if the sheet-like material warps while being transported by the transport roller in the drying oven, the anti-pressure roller suppresses the warpage and coats one surface of the anti-pressure roller and the sheet-like material. Sliding contact with the paint film is avoided, and scratches on the paint film are avoided.
The gist of the fourth invention is that in the invention according to any one of the first to third inventions, the drying oven emits infrared rays or far infrared rays facing the sheet-like member conveyed by the conveyance roller. A heater support member is provided to which a plurality of heaters that heat the sheet-like member by radiating radiation are fixed. Thereby, the sheet-like member conveyed by the conveyance roller is efficiently heated and dried by receiving radiation of infrared rays or far infrared rays.

FIG. 1 is a partially cutaway plan view showing a drying oven equipped with a conveyance roller according to an embodiment of the present invention. FIG. 2 is a side view of a main part of the heating furnace of FIG. 1 for illustrating a conveying roller, a counter-pressing roller, and their driving device. FIG. 2 is an enlarged view of a main part of a conveyance roller provided in the drying oven of FIG. 1 with a portion thereof cut away. FIG. 2 is a diagram illustrating a conveyance path of a sheet-like member conveyed by a conveyance roller provided in the drying oven of FIG. 1, and is a diagram showing a case where the sheet-like member is conveyed so as not to come into contact with one surface of the sheet-like member. . FIG. 2 is a diagram illustrating two types of conveyance paths for a sheet-like member conveyed by a conveyance roller provided in the drying oven of FIG. 1, where the conveyance roller can be brought into contact with one surface of the sheet-like member being conveyed. FIG.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. Note that in the following examples, the drawings are for explaining essential parts related to the invention, and dimensions, shapes, etc. are not necessarily drawn accurately.

FIG. 1 is a partially cutaway plan view showing a drying oven 12 equipped with a conveyance roller 10 according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a rotational drive device 30 that rotationally drives the conveyance roller 10. FIG. 3 is an enlarged view showing main parts of the structure of the conveyance roller 10.

In the drying (heating) furnace 12, a sheet-like member 14 such as copper foil coated with a coating liquid in which polyamic acid, which is a precursor of polyimide resin, is dissolved in an organic solvent, is continuously fed from an unwinding roll (not shown). Once supplied, the coating liquid applied to one side of the sheet-like member 14 is heated and dried to harden it and turn it into polyimide, forming a laminated sheet 16 in which, for example, a polyimide resin is laminated on one side of copper foil. , and are continuously delivered to a take-up roll (not shown). The laminated sheet 16 is flexible, and is made by laminating hardened polyimide resin on one side of the sheet-like member 14, and serves as a base material for electronic circuits to which electronic components are attached, and a flat sheet for connecting connectors to each other. Used as cables, etc.

The drying oven 12 has a tunnel shape and is placed on a frame 18. The drying furnace 12 is provided with a furnace wall 20 formed by a heat insulating material 20a and a casing 20b that covers the heat insulating material 20a, and on both outer sides of the furnace wall 20, and is arranged along the transport direction CR of the sheet-like member 14, that is, the drying furnace 12. A pair of supporting members 22 and 24 are provided parallel to each other in the longitudinal direction, and both ends of the sheet-like member 14 are rotatably supported via bearings 26. The sheet-like member 14 is rotatably supported at both ends via bearings 26 by a plurality of conveying rollers 10 and a pair of supporting members 22 and 24, and is conveyed by the conveying rollers 10 in the drying oven 12. It includes an anti-pressing roller 28 for suppressing warpage caused by the warping, and a rotation drive device 30 that rotationally drives the plurality of conveyance rollers 10 in synchronization.

The pair of support members 22 and 24 are fixed onto the frame 18 via struts 31 that are screwed onto the frame 18 by bolts 29 . The pair of supporting members 22 and 24 are connected by connecting plates 22b and 24b, respectively, with a plurality of opposing pairs of longitudinal supporting plates 22a and 24a separated by a predetermined center distance D1 in a plan view of FIG. It is constructed by connecting them in the longitudinal direction.

The plurality of conveyance rollers 10 are arranged parallel to each other in the width direction of the drying oven 12, that is, in a direction orthogonal to the conveyance direction CR, at substantially constant intervals D in the conveyance direction CR of the sheet-like member 14. There is. The conveyor rollers 10 are arranged between the pair of support members 22 and 24 so that every other roller has the same first height position H1 and a second height position H2 lower than the first height position H1. It is being bridged.

A third height position H3, which is located upstream of a position close to the transport roller 10 at the first height position H1 among the plurality of transport rollers 10 and is higher than the first height position H1, has a transport roller. An anti-press roller 28 having a diameter R2 smaller than a diameter R1 of the roller 10 is rotatably supported by a pair of support members 22 and 24.

As shown in FIG. 3, inside the drying oven 12, there are a plurality of heaters 32 that heat the sheet-like member 14 by radiating infrared rays or far-infrared rays toward the sheet-like member 14 conveyed by the conveyance roller 10. Heater support members 34 to which are fixed are arranged above and below the conveyance roller 10. The heating by the heater 32 accelerates the curing reaction of polyamic acid, which is a precursor of polyimide resin, contained in the coating liquid applied to one surface of the sheet-like member 14, so that one surface of the sheet-like member 14 has the following properties: A hardened polyimide resin layer is formed.

FIG. 3 shows in detail the end of the transport roller 10 on the support member 22 side. The end portion of the conveyance roller 10 on the support member 24 side is similarly configured. In FIG. 3, the conveyance roller 10 includes a pair of support shafts 40 and 42, which are arranged concentrically and spaced apart in the axial direction, and each of which has a pair of opposing shaft side flanges 40a and 42a fixed to the shaft ends, respectively. A pair of roller-side flanges 44a, 44b are removably fastened to the pair of shaft-side flanges 40a, 42a while facing the pair of shaft-side flanges 40a, 42a. A fitting protrusion 46 protrudes from the center of the side flanges 40a, 42a, and is formed on the roller side flanges 44a, 44b. and a fitting hole 48 for mutually centering the two. Note that the fitting protrusion 46 protruding from the center of the shaft side flange 42a and the fitting hole 48 formed on the roller side flange 44b into which the fitting protrusion 46 is fitted are not shown.

The metal roller 44 is made of, for example, a stainless steel tube, and a smooth chrome plating layer is formed on its outer peripheral surface so that the surface of the polyimide resin layer after hardening on one side of the sheet-like member 14 is smooth. ing.

As shown in FIG. 3, an annular collar 52 in which a fitting hole 48 is formed is integrally fitted into the opening of the metal roller 44 by, for example, welding, and the end surface of the metal roller 44 is provided with a step. A hole 54 is formed by machining. Further, a centering protrusion 56 that fits into the stepped hole 54 is formed in the center of the roller side flange 44a. The roller side flange 44a is fixed to the end surface of the metal roller 44 by a fastening screw 58, with its centering protrusion 56 fitting into the stepped hole 54. The shaft-side flange 40a integrally provided at the shaft end of the support shaft 40 can be detachably attached to the shaft-side flange 40a by screwing the fastening screw 60 passed through the shaft-side flange 40a into the roller-side flange 44a. Fixed.

In the conveyance roller 10, the shaft-side flanges 40a, 42a and the roller-side flanges 44a, 44b, which are integrally provided at the shaft ends of the support shafts 40, 42, can be separated from each other by loosening and removing the fastening screws 60. . This allows the metal roller 44 to be replaced while the support shafts 40 and 42 remain attached. Unlike conventional conveyance rollers, there is no need to remove the support shaft from the metal roller and replace the metal roller. As shown in FIG. 3, the support shaft 40 passes through the large diameter shaft inside the drying oven 12 in which the shaft side flange 40a is formed, and the oven wall 20 following the large diameter shaft, and extends outside the drying oven 12. The distance D from the step between the large diameter shaft part and the small diameter shaft part of the support shaft 40 to the inner wall surface of the furnace wall 20 is determined by the fitting protrusion 46. It is set longer than the protrusion length A of.

The support shaft 40 is rotatably supported via a bearing 26 by a pair of support plates 22a outside the drying oven 12 through a through hole 62 provided in the oven wall 20. An annular seal member 64 is inserted into the support shaft 40, and a spring 68 and a thrust bearing 70 are inserted between the annular collar 66 fixed to the support shaft 40 and the annular seal member 64. An annular sealing member 64 is pressed against the opening of the through hole 62 from outside the drying oven 12 . The sealing member 64 prevents the solvent from leaking out from inside the drying oven 12 through the through hole 62, but when the inside of the drying oven 12 is in a gas atmosphere such as nitrogen, it prevents outside air from entering. There are also things.

As shown in detail in FIG. 2, a sprocket 74 is fixed to the output shaft of a drive motor 72 fixed to the frame 18, and sprockets 76 and 78 are fixed to the shaft ends of the support shaft 42 of the conveyance roller 10, respectively. ing. An endless annular chain 80 indicated by a dashed line connects the sprocket 74 of the drive motor 72, the sprocket 76 fixed to the support shaft 42 of the conveyance roller 10 at the first height position H1, and the second height position H2. The conveyance roller 10 is rotatably driven by a chain 80 via a sprocket 78 at the shaft end of the support shaft 42 of the conveyance roller 10 . The drive motor 72, sprockets 74, 76, 78, and chain 80 correspond to the rotational drive device 30 that rotationally drives the plurality of conveyance rollers 10.

Further, as shown in FIG. 2, a large-diameter gear 82 is fixed to the support shaft 42 of the conveyance roller 10 at the first height position H1, and a large-diameter gear 82 is fixed to the shaft end of the anti-pressure roller 28 on the support member 24 side. The small-diameter gears 84 mesh with each other to constitute a speed-up gear device, and the counter-pressing roller 28 is rotationally driven by the conveying roller 10 at the first height position H1. In order to avoid scratches on the surface of the coating liquid applied to the conveyance roller 10, the large-diameter gear 82 and the small-diameter gear 84 are arranged above the metal roller 44 of the conveyance roller 10 at the first height position H1. The tooth ratio is set so that the circumferential speed and the circumferential speed of the counter-pressing roller 28 are the same.

4 and 5 show two types of conveyance paths along which the sheet-like member 14 is conveyed within the drying oven 12. The arrow shown inside the conveyance roller 10 in FIGS. 4 and 5 indicates the rotation direction of the conveyance roller 10. FIG. 4 shows a conveyance path in the case of conveying the sheet-like member 14 conveyed by the conveyance roller 10 so that the conveyance roller 10 does not come into contact with the coating film on one surface (upper surface) of the sheet-like member 14 . FIG. 5 shows a conveyance path when the conveyance roller 10 can be brought into contact with the coating film on one surface (upper surface) of the sheet-like member 14 conveyed by the conveyance roller 10.

As described above, according to the conveyance roller 10 of the drying oven 12 of this embodiment, the pair of shaft-side flanges 40a, 42a fixed to the shaft ends of the pair of support shafts 40, 42 and both ends of the metal roller 44 Fixed roller side flanges 44a, 44b are removably fastened, and a fitting protrusion 46 protruding from the center of the shaft side flanges 40a, 42a is formed on the roller side flanges 44a, 44b. Since the support shafts 40, 42 and the metal roller 44 can be easily separated and the metal roller 44 can be easily replaced, the metal roller 44 can be easily replaced.

Further, according to the conveying roller 10 of the drying oven 12 of this embodiment, the annular collar 52 in which the second fitting hole 50 having the same diameter as the fitting hole 48 is formed is fitted into the opening of the metal roller 44. The roller-side flanges 44a, 44b are removably fixed to the collar 52 by fastening screws 60, so when replacing the metal roller 44, the roller-side flanges 44a, 44b can be removed and reused. There is.

Further, according to the drying oven 12 of the present embodiment, the diameter is smaller than the diameter of the plurality of conveyance rollers 10, and the diameter is smaller than that of the conveyance roller 10 at the first height position H1 among the plurality of conveyance rollers 10. An anti-pressure roller that is rotatably supported at a higher position and closer to the transport roller 10 at the first height position H1 than the transport roller 10 at the second height position H2, and is used to press down the warping of the sheet-like member 14. 28 is rotatably provided for each of the plurality of conveyance rollers 10 at the first height position H1, and the conveyance roller 10 is connected to a large diameter gear 82 and a small diameter gear that constitute a speed increasing gear device together with the anti-pressing roller 28. 84. The anti-pressure roller 28 is driven to rotate at a higher speed than the conveyance roller 10 so that the circumferential speed of the anti-pressure roller 28 is the same as that of the conveyance roller 10 at the first height position H1. As a result, when a warp occurs in the sheet-like member 14 while being transported by the transport roller 10 in the drying oven 12, the anti-pressure roller 28 presses the warp, and one side of the anti-pressure roller 28 and the sheet-like member 14 is pressed down. Sliding contact with the paint film applied to the surface is avoided, and scratches on the paint film are avoided.

Although the present invention has been described above in detail with reference to the drawings, the present invention can also be applied to other aspects.

For example, in the embodiment described above, the fitting protrusion 46 protruding from the center of the shaft-side flanges 40a, 42a is fitted into the fitting hole 48 formed in the center of the roller-side flanges 44a, 44b. However, on the contrary, even if the fitting protrusion protruding from the center of the roller side flanges 44a, 44b is fitted into the fitting hole formed in the center of the shaft side flanges 40a, 42a, good. In short, it is sufficient that the fitting protrusion protruding from the center of one of the shaft-side flanges 40a, 42a and the roller-side flanges 44a, 44b is fitted into the fitting hole formed in the center of the other. .

Further, although the drying oven 12 of the above-described embodiment was equipped with the anti-press roller 28, the anti-press roller 28 is not necessarily provided when the sheet-like member 14 is conveyed, for example, on the conveyance path shown in FIG. It doesn't have to be.

Further, in the above embodiment, the fitting protrusion 46 and the fitting hole 48 into which it is fitted, and the centering protrusion 56 and the stepped hole 54 into which it is fitted are provided. There is no problem even if one of them is omitted.

The above-mentioned embodiment is merely one embodiment of the present invention, and the present invention can be modified in various ways without departing from the spirit thereof.

10: Conveyance roller 12: Drying oven 14: Sheet member 28: Anti-press rollers 40, 42: Support shafts 40a, 42a: Shaft side flange 44: Metal rollers 44a, 44b: Roller side flange 46: Fitting protrusion 48: Fitting hole 50: Second fitting hole 52: Collar 82: Large diameter gear (speed increasing gear device)
84: Small diameter gear (speed increasing gear device)

Claims (4)

A conveying roller of a drying oven that conveys a sheet-like member while drying it in the drying oven,
a pair of support shafts each rotatably supported by a pair of support members, arranged concentrically and spaced apart in the axial direction, and having a pair of opposing shaft side flanges fixed to the shaft ends, respectively;
a metal roller having a pair of roller-side flanges fixedly attached to both ends thereof, the pair of roller-side flanges being removably fastened to the pair of shaft-side flanges while facing the pair of shaft-side flanges;
a fitting protrusion protruding from the center of one of the shaft side flange and the roller side flange;
a fitting hole formed on the other of the shaft-side flange and the roller-side flange, into which the fitting protrusion is fitted to mutually center the pair of support shafts and the roller;
The pair of support members are fixed on the frame via struts that are screwed onto the frame by bolts,
The support shaft includes a large-diameter shaft portion to which the shaft-side flange is fixedly attached, and passes through the oven wall of the drying oven following the large-diameter shaft portion, and is rotatable by the support member outside the drying oven. It has a supported small diameter shaft part integrally,
A drying oven characterized in that a distance from a step between a large-diameter shaft portion and a small-diameter shaft portion of the support shaft to an inner wall surface of the furnace wall is set longer than a protrusion length of the fitting protrusion. Conveyance roller. One opening of the support shaft and the metal roller, to which the other of the shaft-side flange and roller-side flange provided with the fitting hole is fixed, has the fitting protrusion with the same diameter as the fitting hole. A ring-shaped collar with a second fitting hole is fitted into it,
The conveyance roller for a drying oven according to claim 1, wherein the other of the shaft-side flange and the roller-side flange provided with the fitting hole is removably fixed to the collar with a screw. The plurality of conveyance rollers are arranged at the same first height position and at the same first height position every other time in a direction parallel to each other in a pair of support members provided in parallel to each other in the conveyance direction of the sheet-like member in the drying oven. They are spanned so as to be at a second height position lower than the first height position, and are driven to rotate in synchronization with each other,
The pair of support members have a diameter smaller than the diameter of the plurality of conveyance rollers, and are located at a position higher than the conveyance roller at the first height position among the plurality of conveyance rollers, and For each of the plurality of conveyance rollers, an anti-pressure roller is rotatably supported at a position closer to the conveyance roller at the first position than the conveyance roller at the second height position and is configured to press down warping of the sheet-like member. Rotatably installed,
The conveyance roller is connected to the anti-pressure roller through a speed-increasing gear device, and rotates the anti-pressure roller at a higher speed than the conveyance roller so that the circumferential speed of the anti-pressure roller is the same as that of the conveyance roller. The conveyance roller of a drying oven according to claim 1 or 2, characterized in that the conveyance roller is driven. The drying oven includes a heater support member to which a plurality of heaters are fixed, which heat the sheet-like member by radiating infrared rays or far-infrared rays toward the sheet-like member transported by the transport roller. The conveyance roller for a drying oven according to any one of claims 1 to 3, characterized in that:

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