CN210557972U - Conveying device - Google Patents

Abstract

The utility model provides a can restrain the flexion of carrying roller and then prevent that the transport of platelike component from becoming difficult handling device. The conveying device (3) is arranged in a cleaning device (4) and a drying device (5) of a plate-shaped member (glass plate G), and is provided with a plurality of conveying rollers (41, 51.) arranged in a conveying direction of the plate-shaped member (glass plate G), wherein at least one part of the conveying rollers (51) in the drying device (5) is a double-pipe conveying roller, and a shaft part (52) of the double-pipe conveying roller is composed of a metal outer pipe (521) and a carbon fiber reinforced resin inner pipe (522).

Description

Conveying device

Technical Field

The present invention relates to a technique of a carrying device provided in a cleaning device and a drying device for a plate-like member.

Background

A glass plate used for an FPD (Flat Panel Display) represented by a liquid crystal Display is an example of a plate-shaped member, and is manufactured by a forming method called, for example, an overflow down-draw method or a float method.

For example, as shown in fig. 9, the glass plate manufacturing step S100 is constituted by a forming step S101, a cutting step S102, an end face processing step S103, a cleaning step S104, a drying step S105, an inspection step S106, and the like in chronological order.

The cleaning step S104 is a step of washing away polishing dust and the like adhering to the glass plate by performing brushing and then spraying water on the glass plate subjected to the end surface processing. The drying step S105 is a step of blowing air to the cleaned glass plate to blow off water droplets and the like adhering to the glass plate.

However, the conveying device is used in each step from the end surface processing step S103 to the inspection step S106. The glass sheet is conveyed in one direction by these conveying devices from the upstream process (for example, the end surface processing process S103) to the downstream process (for example, the inspection process S106). The glass plate conveying apparatus includes a plurality of conveying rollers arranged in a conveying direction (see patent document 1).

Prior art documents

Patent document

Patent document 1: japanese laid-open patent publication No. 2015-30570

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

However, in such a conveying device, when the outer diameter of the shaft portion of the conveying roller is small, the conveying roller is deflected by its own weight and the weight of the glass sheet, and therefore, there is a problem that conveying of the glass sheet becomes difficult.

The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a conveying device capable of suppressing the deflection of a conveying roller and preventing a plate-shaped member from being difficult to convey.

Means for solving the problems

The problem to be solved by the present invention is as described above, and the means for solving the problem will be described below. That is, the present invention provides a conveying apparatus disposed in a cleaning apparatus and a drying apparatus for a plate-shaped member, wherein the conveying apparatus includes a plurality of conveying rollers arranged in a conveying direction of the plate-shaped member, at least a part of the conveying rollers in the drying apparatus is a double-tube conveying roller, and a shaft portion of the double-tube conveying roller is composed of an outer tube made of metal and an inner tube made of carbon fiber-reinforced resin.

According to the carrying device of the present invention having the above features, since the carrying roller in the drying device can be made lightweight and highly rigid, the deflection of the carrying roller can be suppressed. Further, the plate-like member can be prevented from being difficult to convey.

In the conveying apparatus of the present invention, it is preferable that the metal outer tube of the double tube conveying roller has a wall thickness smaller than that of the carbon fiber reinforced resin inner tube of the double tube conveying roller.

With the above features, the double-tube conveying roller can be further reduced in weight and further increased in rigidity, and therefore, the double-tube conveying roller can be suppressed from being deflected.

In the conveying apparatus of the present invention, it is preferable that the drying apparatus is provided with a blower, and the conveying rollers disposed upstream and downstream of the blower are the double-tube conveying rollers.

With the above features, the weight and rigidity of the conveying roller, particularly the long conveying roller, in the drying device can be reduced, and therefore, the conveying roller can be prevented from being bent.

In the conveying apparatus of the present invention, it is preferable that the air blowing device is provided obliquely to a conveying direction of the plate-like member, and at least the conveying roller on a long side among the conveying rollers coaxially arranged to sandwich the air blowing device is the double-tube conveying roller.

With the above features, the weight and rigidity of the conveying roller, particularly the long conveying roller, in the drying device can be reduced, and therefore, the conveying roller can be prevented from being bent.

In the conveying apparatus of the present invention, it is preferable that the conveying roller on the short side of the conveying roller coaxially arranged so as to sandwich the air knife is a single-layer pipe conveying roller composed only of a metal outer pipe, and the metal outer pipe of the single-layer pipe conveying roller has a larger wall thickness than the metal outer pipe of the double-layer pipe conveying roller.

With the above feature, the conveying roller in the drying device, particularly the short conveying roller, does not use the inner tube made of the carbon fiber reinforced resin, and therefore the cost of the conveying roller can be suppressed.

In the conveying device of the present invention, it is preferable that the conveying roller in the cleaning device is a single-layer pipe conveying roller, and is supported by bearings at both end positions and at a midway position, and a shaft portion of the single-layer pipe conveying roller is constituted only by a metal outer pipe.

With the above feature, since the both end positions and the intermediate position of the conveying roller in the cleaning device are supported, the conveying roller can be suppressed from being deflected. Further, it is possible to prevent the plate-like member from being difficult to convey due to the deflection of the conveying roller. Further, since the conveying roller in the cleaning device does not use the carbon fiber reinforced resin inner tube, the cost of the conveying roller can be suppressed.

In the conveying apparatus of the present invention, it is preferable that the length of a contact line between the buffer portion of the conveying roller fitted to the shaft portion and the plate-like member in the cleaning apparatus is long, and the length of a contact line between the buffer portion of the conveying roller fitted to the shaft portion and the plate-like member in the drying apparatus is short.

With the above feature, in the cleaning apparatus, the buffer portion of the transport roller uniformly distributes water droplets adhering to the plate-like member, so that the uneven local wetting of the plate-like member can be eliminated. In the drying apparatus, the buffer portion of the conveying roller supports the plate-like member at a point and allows air to flow well, so that the plate-like member can be completely dried.

Effect of the utility model

The effect of the present invention is as follows. That is, the bending of the conveying roller can be suppressed, and the difficulty in conveying the plate-like member can be prevented.

Drawings

Fig. 1 is a side view showing a part of the structure of a glass manufacturing apparatus.

Fig. 2 is a plan view showing a specific configuration of the conveying device.

Fig. 3 is a side view showing a shaft portion of the conveyance roller in the drying device. Fig. 3 (a) is an X-X cross-sectional view of the double-tube conveying roller.

Fig. 4 is a side view showing a shaft portion of the conveyance roller in the drying device. Fig. 4 (a) is an X-X cross-sectional view of the single-layer pipe conveyance roller.

Fig. 5 is a side view showing a shaft portion of the conveyance roller in the cleaning device. Fig. 5 (a) is an X-X cross-sectional view of the single-layer pipe conveyance roller.

Fig. 6 is a sectional view showing a structure of a driving conveyance roller in the drying device.

Fig. 7 is a sectional view showing a structure for supporting the conveyance roller in the drying device.

Fig. 8 is a sectional view showing a structure for supporting the conveying roller in the cleaning apparatus.

Fig. 9 is a process diagram showing a glass plate manufacturing process.

Description of reference numerals:

a glass manufacturing apparatus;

a handling device;

cleaning the device;

a carry roller;

a shaft portion;

43.. a cushioning portion;

a handling device;

cleaning brushes;

4c.. a water spraying device;

a cleaning room;

a metal outer tube;

a shaft end;

a bearing;

a bearing;

a carry roller;

a shaft portion;

53... a cushioning portion;

a handling device;

an air jet device (air blower);

a drying room;

a metal outer tube;

an inner tube made of carbon fiber reinforced resin;

523.. shaft end;

a metal outer tube;

a shaft end;

a bearing;

glass plate (plate-like member).

Detailed Description

The glass plate G in the present application is an example of a plate-shaped member and is a glass plate for a liquid crystal display, but is not limited thereto, and may be a glass plate for other FPD such as a plasma display, an organic EL display, or the like. The glass plate is not limited to a glass plate, and may be a plate-like member made of metal or resin, for example.

An embodiment of the present invention will be described with reference to fig. 1 to 9. In the following description, the direction of arrow a in fig. 1 and 2 is defined as the conveying direction of the glass sheet G.

First, the cleaning apparatus 4 and the drying apparatus 5 constituting the glass manufacturing apparatus 1 will be described with reference to fig. 1 and 2.

The cleaning apparatus 4 in the present embodiment performs the cleaning step S104 (see fig. 9) in the above-described manufacturing step S100 of the glass sheet G.

The cleaning device 4 washes away abrasive dust and the like adhering to the glass plate G after the glass plate G having been subjected to the end surface processing is scrubbed and then sprayed with water. The cleaning device 4 mainly includes a conveying device 4A for conveying the glass plate G in a horizontal posture, a cleaning brush 4B for cleaning the polishing dust and the like adhering to the glass plate G, and a water jet device 4C for washing the polishing dust and the like adhering to the glass plate G. The surroundings of the carrying device 4A, the brush 4B, and the water jet device 4C are covered with a cleaning booth 4D.

The conveying device 4A includes a plurality of conveying rollers 41, 41 arranged in line in the conveying direction of the glass sheet G. The conveying rollers 41, 41 are each engaged at one end with an orthogonal drive shaft 44 by means of a gear. Therefore, when the drive shaft 44 is rotated by the drive motor 45, all the conveyance rollers 41 and 41 rotate in the same direction.

With the conveying device 4A configured as described above, the glass sheet G is conveyed in the conveying direction (the direction of arrow a) while being placed on the plurality of conveying rollers 41, 41. That is, the glass sheet G is conveyed toward the drying device 5 on the downstream side. The conveyance rollers 41 and 41 have cylindrical buffer portions 43 fitted around the outer peripheries of the respective shaft portions 42. The shaft portion 42 and the buffer portion 43 will be described in detail later.

The brushes 4B are arranged at equal intervals in the conveying direction and the width direction of the glass plate G (the direction orthogonal to the arrow a direction in plan view). The brushes 4B and 4B are provided with resin bristles implanted on the lower surface side thereof, and the resin bristles are arranged so as to contact the glass plate G conveyed by the conveying device 4A. Therefore, when the brushes 4B, 4B. The glass plate G may be cleaned using a disk-shaped sponge (for example, polyvinyl alcohol (PVA) resin) without being limited to the brush 4B. In fig. 1, the brush 4B cleans only the upper surface of the glass plate G, but the back surface of the glass plate G may be cleaned, or the back surface of the glass plate G may be cleaned with the disk-shaped sponge described above.

The water jet devices 4C are arranged in pairs in the vertical direction so as to sandwich the conveyed glass sheet G. The water jets of the water jets 4C and 4C extend in the width direction of the glass sheet G (the direction perpendicular to the direction of arrow a in plan view), and water discharged from the water jets is blown toward the glass sheet G so as to form a water film. Therefore, when the water jet devices 4C and 4C are operated, the polishing dust and the like can be washed from both surfaces of the glass plate G conveyed by the conveying device 4A.

The drying device 5 in the present embodiment performs the drying step S105 (see fig. 9) in the above-described step S100 of manufacturing the glass sheet G.

The drying device 5 blows air to the cleaned glass sheet G to fly water droplets and the like adhering to the glass sheet G. The drying device 5 mainly includes a conveying device 5A for conveying the glass sheet G in a horizontal posture and an air jetting device 5B for blowing off water droplets adhering to the glass sheet G. The peripheries of the conveying device 5A and the air jet device 5B are covered by a drying room 5C. A water tank 56 for accommodating a drive shaft 54 described later is provided outside the drying compartment 5C.

The conveying device 5A includes a plurality of conveying rollers 51, 51 arranged in line in the conveying direction of the glass sheet G. The conveying rollers 51, 51 are engaged at one end with an orthogonal drive shaft 54 via gears. Therefore, when the drive shaft 54 is rotated by the drive motor 55, all the conveyance rollers 51, 51 rotate in the same direction.

According to the conveying device 5A configured as described above, the glass sheet G is conveyed in the conveying direction (the direction of arrow a) while being placed on the plurality of conveying rollers 51, 51. That is, the glass sheet G is conveyed toward an unillustrated inspection apparatus on the downstream side. The conveying rollers 51 and 51 have disk-shaped buffer portions 53 fitted around the outer peripheries of the respective shaft portions 52. The shaft 52 and the buffer 53 are described in detail later.

The air jet devices 5B are arranged in pairs in the vertical direction so as to sandwich the conveyed glass sheet G. The air jet devices 5B and 5B are so-called air blowers, and each air jet port extends obliquely with respect to the conveyance direction of the glass sheet G, and air discharged from the air jet port is blown as an air film to the glass sheet G. Therefore, when the air jet devices 5B and 5B are operated, water droplets and the like can be blown off from both surfaces of the glass sheet G conveyed by the conveying device 5A.

As described above, the glass sheet G passes through the cleaning device 4 and the drying device 5, and the cleaning step S104 and the drying step S105 (see fig. 9) are continuously performed on the glass sheet G. The conveying device 4A of the cleaning device 4 and the conveying device 5A of the drying device 5 are integrally arranged along the conveying direction of the glass sheet G. Therefore, the description will be made with the conveying device 4A and the conveying device 5A as one conveying device 3.

Next, the conveying rollers 51, 51 of the conveying device 3 will be described with reference to fig. 2 to 5. The air ejection device 5B will be described as the air blower 5B.

As described above, the air ejection ports of the air wipers 5B extend obliquely to the conveyance direction of the glass sheet G. Therefore, when viewed as in fig. 2, the conveying device 3 includes a plurality of conveying rollers 51, 51 whose length dimension is gradually shortened in the conveying direction of the glass sheet G, and a plurality of conveying rollers 51, 51 whose length dimension is gradually lengthened in the conveying direction of the glass sheet G.

The conveying device 3 further includes a plurality of conveying rollers 51, 51 located upstream of the blower 5B and having a uniform length in the conveying direction of the glass sheet G. Further, the conveyance rollers 51, 51 are provided downstream of the air knife 5B and have the same length in the conveyance direction of the glass sheet G. The configuration for driving these conveyance rollers 51, 51 will be described in detail later.

The conveying rollers 51 constituting the conveying device 3 can be distinguished according to their arrangement. Hereinafter, the conveying roller 51 disposed on the upstream side of the blower 5B is referred to as "upstream side conveying roller 51U". The conveyance roller 51 disposed downstream of the blower 5B is referred to as "downstream conveyance roller 51D". The conveyance roller 51 disposed on the left side with respect to the blower 5B when viewed from the opposite side to the conveyance direction a and having a length dimension gradually shortened as it is disposed in the conveyance direction a is referred to as "left conveyance roller 51L". The conveyance roller 51 disposed on the right side with respect to the blower 5B when viewed from the opposite side to the conveyance direction a and having a length gradually increased as it is disposed in the conveyance direction a is referred to as "right conveyance roller 51R".

The shaft portions 52 of the upstream side conveying roller 51U and the downstream side conveying roller 51D are composed of an outer tube 521 made of metal and an inner tube 522 made of carbon fiber reinforced resin (see fig. 3). The metal outer pipe 521 is a cylindrical stainless steel pipe, and the carbon fiber Reinforced resin inner pipe 522 is a cylindrical CFRP (carbon fiber Reinforced Plastics) pipe. Further, since the inner tube 522 made of carbon fiber reinforced resin is fitted into the metal outer tube 521, the conveying rollers 51U and 51D can be referred to as "double tube conveying rollers". The shaft end portions 523 having a slightly smaller diameter than the metal outer pipe 521 are welded to both end surfaces of the metal outer pipe 521.

Further, in the upstream side conveying roller 51U and the downstream side conveying roller 51D, the thickness t1 of the metal outer pipe 521 is smaller than the thickness t2 of the carbon fiber reinforced resin inner pipe 522 (see fig. 3). That is, the wall thickness t1 of the metal outer pipe 521 and the wall thickness t2 of the carbon fiber-reinforced resin inner pipe 522 satisfy the relationship of t1 < t 2. Such an arrangement is intended to utilize the characteristics of carbon fiber reinforced resin which is lightweight and has high rigidity. Accordingly, the upstream side conveying rollers 51U can be further reduced in weight and further increased in rigidity, and therefore, the upstream side conveying rollers 51U can be suppressed from being bent. Further, since the downstream side conveying rollers 51D can be further reduced in weight and further increased in rigidity, the downstream side conveying rollers 51D can be suppressed from being flexed.

The left conveyance roller 51L and the right conveyance roller 51R are coaxially arranged so as to sandwich the air blower 5B. As described above, the left side conveying rollers 51L, 51L. The right side conveying rollers 51R, 51R.

When the length of the left side conveying roller 51L is longer than the length of the right side conveying roller 51R disposed coaxially, the shaft portion 52 is constituted by the metal outer tube 521 and the carbon fiber reinforced resin inner tube 522 (see fig. 3). The left side conveying roller 51L has the same structure as the upstream side conveying roller 51U and the downstream side conveying roller 51D except for the length thereof. When the length of the left side conveying roller 51L is shorter than the length of the right side conveying roller 51R disposed coaxially, the shaft portion 52 is constituted only by the metal outer tube 524 (see fig. 4). Such a left side conveying roller 51L can be referred to as a "single-layer pipe conveying roller". A shaft end portion 525 having a slightly smaller diameter than the metal outer tube 524 is welded to both end surfaces of the metal outer tube 524.

On the other hand, when the length of the right side conveying roller 51R is longer than the length of the left side conveying roller 51L coaxially arranged, the shaft portion 52 is composed of the metal outer tube 521 and the carbon fiber reinforced resin inner tube 522 (see fig. 3). The right side conveying roller 51R has the same structure as the upstream side conveying roller 51U and the downstream side conveying roller 51D except for the length thereof. When the length of the right side conveying roller 51R is shorter than the length of the coaxially arranged left side conveying roller 51L, the shaft portion 52 is constituted only by the metal outer tube 524 (see fig. 4). Such a right side conveying roller 51R can be referred to as a "single-layer pipe conveying roller". A shaft end portion 525 having a slightly smaller diameter than the metal outer tube 524 is welded to both end surfaces of the metal outer tube 524.

The thickness t3 of the metal outer tube 524 in the single-layer tube conveying rollers of the left and right conveying rollers 51L and 51R, which are part of the rollers, is thicker than the thickness t1 of the metal outer tube 521 in the double-layer tube conveying rollers (see fig. 3 and 4). That is, the wall thickness t3 of the outer metal pipe 524 in the single-layer pipe conveying roller and the wall thickness t1 of the outer metal pipe 521 in the double-layer pipe conveying roller satisfy the relationship of t3 > t 1. This arrangement is because it is sufficient to use a hollow shaft having a slightly large wall thickness without using an expensive carbon fiber-reinforced resin for the conveyance roller having a short longitudinal direction and being less likely to be bent. Thus, when the right transport roller 51R is a single-layer tube transport roller, the right transport roller 51R does not use the carbon fiber reinforced resin inner tube 522, and therefore the cost of the right transport roller 51R can be reduced. In the case where the left side conveying roller 51L is a single-layer pipe conveying roller, the inner pipe 522 made of carbon fiber reinforced resin is not used for the left side conveying roller 51L, and therefore the cost of the left side conveying roller 51L can be suppressed.

Next, a configuration for driving the conveying rollers 51 and 51 will be described with reference to fig. 2 and 6.

The drive motor 55 is disposed outside the drying compartment 5C. The first gear 61 provided on the output shaft 55a of the drive motor 55 meshes with the second gear 62 provided on the drive shaft 54. The third gear 63 provided on the drive shaft 54 also meshes with the fourth gear 64 provided on the shaft portion 52 (shaft end portions 523 and 525) of the conveyance roller 51. Therefore, the driving force of the driving motor 55 can be transmitted to the conveying roller 51.

The drive shaft 54 is disposed inside the water tank 56. Therefore, the third gear 63 provided on the drive shaft 54 is immersed in the water W stored in the water tank 56. The water level of the water W may be changed by using a water level changing mechanism, not shown. Further, the water W may be kept clean by using a water purification mechanism not shown. Fig. 6 shows a mode in which the third gear 63 is immersed in the water W in the water tank 56, but the present invention is not limited to this, and water may be transferred from the fourth gear 64 to the third gear 63 by dropping the water from above the fourth gear 64.

Accordingly, even if the third gear 63, the fourth gear 64, and the like are worn and generate dust, the dust is captured by the water W and washed into the water tank 56, so that the dust can be prevented from scattering and adhering to the glass plate G. Further, the quality of the glass sheet G can be improved.

Next, the structure for supporting the conveyance rollers 41 and 51 will be described with reference to fig. 7 and 8.

Both end positions of the shaft portion 52 of the conveyance roller 51 are supported by the bearing tables 71, 71. The upper end of the bearing table 71 is recessed to hold the bearing 57. A water reservoir 71b is formed at the upper end of the bearing table 71 so as to surround the bearing 57. Therefore, the bearing 57 fitted in the shaft portion 52 (the shaft end portions 523 and 525) is immersed in the water W stored in the water reservoir portion 71 b. The water W may be circulated by using a water circulation mechanism, not shown. Further, the water W may be kept clean by using a water purification mechanism not shown. Fig. 7 shows a mode in which the bearing 57 is immersed in the water W in the water reservoir 71b, but the present invention is not limited to this, and water may be dropped on the upper portion of the bearing 57.

Thus, even if the bearing 57 or the like is worn and generates dust, the dust is captured by the water W and washed into the water storage portion 71b, so that the dust can be prevented from scattering and adhering to the glass plate G. Further, the quality of the glass sheet G can be improved.

On the other hand, the cleaning apparatus 4 has a different structure for supporting the conveyance roller 41. That is, both end positions of the shaft 42 of the conveyance roller 41 are supported by the bearing tables 72, and the center position of the shaft 42 is supported by the bearing table 73. The upper end of the bearing table 72 is recessed to hold the bearing 47. The upper end of the bearing base 73 is also recessed to hold the bearing 48. However, the bearing 47 and the bearing 48 are not immersed in water. The reason for this is that the water is sprayed onto the glass sheets G in the cleaning room 4D of the cleaning device 4 to form a splash state, and the dust can be captured by the water.

This can reliably suppress the shaft 42 of the conveyance roller 41 from flexing. The shaft 42 of the conveying roller 41 is formed only by the metal outer tube 421 (see fig. 5). That is, the conveying roller 41 can be referred to as a "single-layer pipe conveying roller". The shaft ends 422 having a slightly smaller diameter than the metal outer tube 421 are welded to both end surfaces of the metal outer tube 421.

The thickness t4 of the outer metal tube 421 of the single-layer tube conveying roller as the conveying roller 41 is equal to the thickness t3 of the outer metal tube 524 of the other single-layer tube conveying rollers (see fig. 4 and 5). That is, the thickness t4 of the outer metal tube 421 in the single-layer tube conveying roller and the thickness t3 of the outer metal tube 524 in the other single-layer tube conveying rollers satisfy the relationship of t4 being t 3. This is because even a long conveyance roller, which is likely to be bent in the longitudinal direction, is sufficient to support the center position of the shaft portion 42 without using an expensive carbon fiber-reinforced resin. Thus, the conveying roller 41 does not use an inner tube made of carbon fiber reinforced resin, and therefore the cost of the conveying roller 41 can be reduced.

Next, the buffer portions 43 of the conveying rollers 41 and the buffer portions 53 of the conveying rollers 51 will be described with reference to fig. 2.

The buffer 43 is a cylindrical PVA sponge that is long in the axial direction. The PVA sponge has both water absorption and elasticity due to its fine pores. Further, since the contact line length designed to contact the glass plate G is long, water droplets adhering to the plate-like member (glass plate G) can be distributed uniformly. Therefore, the partial wetting unevenness of the glass sheet G can be prevented.

The cushion portion 53 is a member in which a rubber ring is fitted on a disk-shaped support base that is short in the axial direction. The rubber ring has water resistance, elasticity, and chemical resistance according to its molecular structure. Further, since the contact line length designed to contact the glass plate G is short, the glass plate G is point-supported and air flow is good. Therefore, the glass sheet G can be completely and completely dried.

In fig. 2, the description has been given using the conveying roller 41 having the buffer portion 43 and the conveying roller 51 having the buffer portion 53, but the present invention is not limited to the conveying roller having the buffer portion. For example, a resin roll made of a polymer polyethylene resin (U-PE) or a polyether ether ketone resin (PEEK) may be used as the transport roll 41 or the transport roll 51 as it is without providing the buffer portion.

The technical idea and effects of the carrying device 3 of the present invention are summarized as follows.

The conveying device 3 of the present invention is a conveying device 3 disposed in a cleaning device 4 and a drying device 5 of a plate-shaped member (glass plate G), and includes a plurality of conveying rollers 41 and 51 arranged in a conveying direction of the plate-shaped member (glass plate G), and at least a part of the conveying rollers 51 in the drying device 5 is a double-tube conveying roller having a shaft portion 52 formed of a metal outer tube 521 and a carbon fiber reinforced resin inner tube 522.

According to the carrying device 3 of the present invention having the above features, since the carrying roller 51 in the drying device 5 can be made lightweight and highly rigid, the deflection of the carrying roller 51 can be suppressed. Further, it is possible to prevent the plate-like member (glass plate G) from being difficult to convey.

In the conveying apparatus 3 of the present invention, it is preferable that the thickness t1 of the metal outer tube 521 in the double tube conveying roller be smaller than the thickness t2 of the carbon fiber reinforced resin inner tube 522 in the double tube conveying roller.

With the above features, the double-tube conveying roller can be further reduced in weight and further increased in rigidity, and therefore, the double-tube conveying roller can be suppressed from being deflected.

In the conveying device 3 of the present invention, it is preferable that a blower 5B is provided in the drying device 5, and the conveying rollers 51 disposed upstream and downstream of the blower 5B are the double-tube conveying rollers.

With the above features, the weight and rigidity of the conveying roller 51, particularly the long conveying roller 51 in the drying device 5 can be reduced, and therefore, the conveying roller 51 can be prevented from being bent.

In the conveying device 3 of the present invention, it is preferable that the air knife 5B is provided obliquely to the conveying direction of the plate-like member (glass sheet G), and at least the conveying roller 51 on the longer side among the conveying rollers 51 coaxially arranged so as to sandwich the air knife 5B is the double-tube conveying roller.

With the above features, the weight and rigidity of the conveying roller 51, particularly the long conveying roller 51 in the drying device 5 can be reduced, and therefore, the conveying roller 51 can be prevented from being bent.

In the conveying device 3 of the present invention, it is preferable that the conveying roller 51 on the short side of the conveying rollers 51 coaxially arranged with the air knife 5B interposed therebetween is a single-layer pipe conveying roller composed only of the metal outer pipe 524, and the thickness t3 of the metal outer pipe 524 of the single-layer pipe conveying roller is larger than the thickness t1 of the metal outer pipe 521 of the double-layer pipe conveying roller.

With the above feature, the conveying roller 51 in the drying device 5, particularly the short conveying roller 51, does not use the carbon fiber reinforced resin inner tube 522, and therefore the cost of the conveying roller 51 can be suppressed.

In the conveying device 3 of the present invention, it is preferable that the conveying roller 41 in the cleaning device 4 is a single-layer pipe conveying roller having a shaft portion 4 formed only of the metal outer pipe 421, and is supported by bearings 47 and 48 at both end positions and at a middle position.

With the above feature, since the both end positions and the middle position of the conveying roller 41 in the cleaning device 4 are supported, the conveying roller 41 can be suppressed from being deflected. Further, it is possible to prevent the plate-like member (glass plate G) from being difficult to convey due to the deflection of the conveying roller 41. Further, since the conveying roller 41 in the cleaning device 4 does not use an inner tube made of carbon fiber reinforced resin, the cost of the conveying roller 41 can be suppressed.

In the conveying apparatus 3 of the present invention, it is preferable that the length of a contact line between the buffer portion 43 of the conveying roller 41 fitted to the shaft portion 42 and the plate-like member (glass plate G) in the cleaning apparatus 4 is long, and the length of a contact line between the buffer portion 53 of the conveying roller 51 fitted to the shaft portion 52 and the plate-like member (glass plate G) in the drying apparatus 5 is short.

With the above feature, in the cleaning device 4, the buffer portion 43 of the conveying roller 41 uniformly distributes water droplets adhering to the plate-shaped member (glass sheet G), and therefore, local wetting unevenness of the plate-shaped member (glass sheet G) can be prevented. In the drying device 5, the buffer 53 of the conveying roller 51 supports the plate-shaped member (glass sheet G) at a point and allows air to flow well, so that the plate-shaped member (glass sheet G) can be completely dried over the entire surface.

Claims (7)

1. A conveying device arranged in a cleaning device and a drying device for a plate-like member,

the conveying device is provided with a plurality of conveying rollers which are arranged in a conveying direction of the plate-shaped member,

at least a part of the conveying rollers in the drying device is a double-tube conveying roller, and a shaft part of the double-tube conveying roller is composed of a metal outer tube and a carbon fiber reinforced resin inner tube.

2. Handling device according to claim 1,

the wall thickness of the metal outer tube in the double tube conveying roller is thinner than that of the carbon fiber reinforced resin inner tube in the double tube conveying roller.

3. Handling device according to claim 1 or 2,

a blowing device is arranged in the drying device,

the conveyance rollers disposed on the upstream side and the downstream side of the air knife are the double tube conveyance rollers.

4. Handling device according to claim 3,

the air knife is provided obliquely with respect to the conveying direction of the plate-like member,

at least the conveying roller on the long side among the conveying rollers coaxially arranged so as to sandwich the air brush is the double-tube conveying roller.

5. Handling device according to claim 4,

the conveying roller on the short side of the conveying rollers coaxially arranged with the air knife sandwiched therebetween is a single-layer pipe conveying roller composed only of a metal outer pipe,

the wall thickness of the metal outer pipe in the single-layer pipe conveying roller is larger than that of the metal outer pipe in the double-layer pipe conveying roller.

6. Handling device according to claim 1 or 2,

the conveying roller in the cleaning device is a single-layer pipe conveying roller, the conveying roller is supported by bearings at two end positions and a middle position, and a shaft part of the single-layer pipe conveying roller is only composed of a metal outer pipe.

7. Handling device according to claim 6,

the length of a contact line between the buffer part of the conveying roller nested in the shaft part and the plate-shaped member in the cleaning device is long,

the length of a contact line between the buffer portion of the conveying roller nested in the shaft portion and the plate-like member in the drying device is short.

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