CN116062470A - Conveying roller and glass manufacturing method - Google Patents

Abstract

Provided is a technique for improving maintainability of a conveying roller. The conveying roller is used for conveying glass. The conveying roller includes: a rotation shaft; a core member that rotates together with the rotation shaft; and a surface member attached to an outer peripheral surface of the core member. The surface member is divided into a plurality of segments in the circumferential direction and the axial direction of the core member.

Description

Conveying roller and glass manufacturing method

Technical Field

The present disclosure relates to conveyor rolls and glass manufacturing methods.

Background

Conventionally, conveying rollers have been used for conveying glass sheets or steel sheets. The transport roller described in patent document 1 includes a carbon core, a cylindrical body that is in close contact with the surface of the carbon core, and a fixing jig that fixes the cylindrical body to a predetermined position of the carbon core. The cylindrical body is made of, for example, a C/C composite material, a composite material of Si and SiC, or the like. The fixing jigs are embedded at two ends of the carbon core.

Patent document 1: japanese patent laid-open No. 2002-285229

The transport rollers are maintained regularly. The replacement of the cylindrical body of patent document 1 is performed, for example, by removing a fixing jig for fixing the cylindrical body from the carbon core, extracting the carbon core from the through hole of the cylindrical body, and inserting the carbon core into the through hole of a new cylindrical body. The carbon core is complicated to insert and pull out, and the maintainability is poor.

Disclosure of Invention

One aspect of the present disclosure provides a technique for improving maintainability of a conveying roller.

A conveying roller according to an aspect of the present disclosure is used for conveying glass. The conveying roller includes: a rotation shaft; a core member that rotates together with the rotation shaft; and a surface member attached to an outer peripheral surface of the core member. The surface member is divided into a plurality of segments in the circumferential direction and the axial direction of the core member.

According to one aspect of the present disclosure, by dividing the surface member into a plurality of segments in the circumferential direction and the axial direction of the core member, the segments can be individually replaced in the radial direction of the core member even if the core member is not inserted and extracted in the axial direction of the core member. Therefore, maintainability of the conveying roller can be improved.

Drawings

Fig. 1 is a side view of a conveyor according to an embodiment.

Fig. 2 is a front cross-sectional view of a conveying roller according to an embodiment.

Fig. 3 (a) is a front view of a conveying roller according to an embodiment, and fig. 3 (B) is a side view of a conveying roller according to an embodiment.

Fig. 4 (a) is a front view of the conveying roller according to the first modification, and fig. 4 (B) is a side view of the conveying roller according to the first modification.

Fig. 5 (a) is a front view of the conveying roller according to the second modification, and fig. 5 (B) is a side view of the conveying roller according to the second modification.

Fig. 6 (a) is a front view of the conveying roller according to the third modification, and fig. 6 (B) is a side view of the conveying roller according to the third modification.

Fig. 7 (a) is a front view of a conveying roller according to a fourth modification, and fig. 7 (B) is a side view of a conveying roller according to a fourth modification.

Fig. 8 (a) is a front view of a conveying roller according to a fifth modification, and fig. 8 (B) is a side view of a conveying roller according to a fifth modification.

FIG. 9 (A) shows r1 _before And r2 _before Side view of one example of the size relationship of (a) and (B) of fig. 9 is a diagram showing r1 _after And r2 _after A side view of one example of a size relationship of (a).

Fig. 10 is a side view showing an example of a through groove penetrating a segment in the axial direction of a core member.

Fig. 11 is a side sectional view showing an example of a bolt.

Fig. 12 is a side view showing an example of two segments overlapping in the circumferential direction of the core member.

Fig. 13 (a) is a side view showing an example of a filling member at room temperature, and fig. 13 (B) is a side view showing an example of a filling member at the time of use (at the time of glass conveyance).

Description of the reference numerals

Conveying rollers; a rotating shaft; core part; surface features; 61. the pieces; g. glass.

Detailed Description

Embodiments of the present disclosure will be described below with reference to the drawings. In the drawings, the same or corresponding structures may be denoted by the same reference numerals, and description thereof may be omitted. In each drawing, the X-axis direction, the Y-axis direction, and the Z-axis direction are directions perpendicular to each other. The X-axis direction is the conveyance direction of the glass G, and the Y-axis direction is the axial direction of the conveyance roller 2. In the specification, "to" representing a numerical range means that numerical values described before and after the numerical value are included as a lower limit value and an upper limit value.

First, referring to FIG. 1, for a real objectThe conveying device 1 according to the embodiment will be described. The conveyor 1 conveys glass G. The glass G is, for example, alkali-free glass, aluminosilicate glass, borosilicate glass, soda lime glass, or the like. The alkali-free glass means that it contains substantially no Na ₂ O、K ₂ Glass of alkali metal oxide such as O. Here, the phrase substantially not containing an alkali metal oxide means that the total amount of the alkali metal oxide content is 0.1 mass% or less.

The glass G is formed, for example, into a band plate shape. The thickness of the glass G is selected according to the use of the glass G. In the case where the glass G is used as a cover glass for a display, the thickness of the glass G is, for example, 0.1mm to 5.0mm. When the glass G is used as a glass substrate for a display, the glass G has a thickness of, for example, 0.1mm to 0.7mm. In the case where the glass G is used as a windshield of an automobile, the thickness of the glass G is, for example, 0.2mm to 3.0mm. The width (Y-axis dimension) of the glass G is, for example, 1m to 6m. After being conveyed by the conveyor 1, the glass G is cut into a desired shape and size.

Examples of the method for forming the glass G include a float method and a melting method. The glass G formed by the float process is slowly cooled while being transported in the horizontal direction. The glass G formed by the melting method is slowly cooled while being conveyed in the vertical direction, and then slowly cooled while being conveyed in the horizontal direction.

The conveying device 1 includes a plurality of conveying rollers 2 spaced apart in the conveying direction of the glass G. The conveyance direction of the glass G is horizontal in fig. 1, but may be vertical. The glass G is transported at a temperature of 500 to 800 ℃, for example, and the transport rollers 2 are used at a temperature of 500 to 800 ℃, for example.

Next, a conveying roller 2 according to an embodiment will be described with reference to fig. 2 and 3. As shown in fig. 2, the conveying roller 2 includes a rotary shaft 3, a core member 5, and a surface member 6. The rotation shaft 3 is formed of, for example, heat-resistant steel. The rotation shafts 3 are provided at both axial ends of the core member 5. At least one rotating shaft 3 is connected to a motor not shown. The motor rotates the rotation shaft 3. One rotation shaft 3 may be a driven shaft that rotates together with the other rotation shaft 3, or may be rotatably supported by a bearing or the like.

The core member 5 rotates together with the rotation shaft 3. The core member 5 is formed of, for example, heat-resistant steel. The Y-axis dimension of the core member 5 is longer than the Y-axis dimension of the glass G. The core member 5 may have a hollow structure for weight reduction. Specifically, the core member 5 includes a cylindrical portion 51 and a pair of disk portions 52 that block openings at both axial ends of the cylindrical portion 51. The cylindrical portion 51 may be square although it is cylindrical. Each disk portion 52 is provided with a rotary shaft 3.

The surface member 6 is detachably attached to the outer peripheral surface 53 of the core member 5 (for example, the cylindrical portion 51) using a bolt (not shown). The surface member 6 is divided into a plurality of segments 61 in the circumferential direction and the axial direction of the core member 5. The circumferential direction of the core member 5 refers to the rotational direction of the core member 5. The axial direction of the core member 5 refers to the extending direction of the rotation center line CR. The radial direction of the core member 5 is a direction orthogonal to the rotation center line CR.

The surface member 6 is divided into a plurality of segments 61 not only in the axial direction of the core member 5 but also in the circumferential direction of the core member 5. For example, as shown in fig. 3 (a), the surface member 6 is divided into three pieces 61 in the axial direction of the core member 5, and is divided into two pieces 61 in the circumferential direction of the core member 5. The number of divisions and the division positions of the surface member 6 are not particularly limited.

As described above, the surface member 6 is divided into the plurality of fragments 61 not only in the axial direction of the core member 5 but also in the circumferential direction of the core member 5. Thus, even if the core member 5 is not inserted and removed in the axial direction of the core member 5 as in patent document 1, the fragments 61 can be individually attached and detached in the radial direction of the core member 5, and the replacement work is easy. Therefore, maintainability of the conveying roller 2 can be improved. In addition, only a part of the surface member 6 can be replaced, and the manufacturing cost and the storage cost of the replacement member can be reduced as compared with the case of replacing the whole. In particular, when the plurality of segments 61 have the same shape, the same size, and the same material, the manufacturing cost and the storage cost can be further reduced.

As shown in fig. 3 (a), the surface member 6 may have a first groove 62 and a second groove 63 on the contact surface with the glass G. The first groove 62 extends in the axial direction of the core member 5, separating a plurality of segments 61 adjacent in the circumferential direction of the core member 5. The second groove 63 extends in the circumferential direction of the core member 5, separating the plurality of segments 61 adjacent in the axial direction of the core member 5. The first groove 62 and the second groove 63 reduce thermal stress caused by a difference in linear expansion coefficients of the segment 61 and the core member 5 by separating the plurality of segment 61. The first groove 62 and the second groove 63 allow foreign matter interposed between the glass G and the surface member 6 to escape into the first groove 62 and the second groove 63, thereby suppressing damage to the glass G.

As shown in fig. 3 (B), the segment 61 has an inner surface 64 facing the outer peripheral surface 53 of the core member 5, and an outer surface 65 facing opposite to the inner surface 64. The inner surface 64 of the segment 61 has, for example, an arcuate shape when viewed in the axial direction of the core member 5, and contacts the outer peripheral surface 53 of the core member 5 at a predetermined distance from the rotation center line CR of the core member 5. Although not shown, a buffer material such as heat-resistant cloth may be provided between the core member 5 and the segment 61. As the heat-resistant cloth, for example, a carbon felt is used.

The outer surface 65 of the segment 61 has, for example, an arcuate shape when viewed in the axial direction of the core member 5, and contacts the glass G at a predetermined distance from the rotation center line CR of the core member 5. The outer surface 65 of the segment 61 may have a chamfer surface, not shown, at least in part of its peripheral edge. The chamfer may be any of an R chamfer and a C chamfer. By forming the chamfer on at least a part of the peripheral edge of the outer surface 65, damage to the glass G can be reduced. Preferably, chamfer surfaces are integrally formed on the periphery of the outer surface 65.

The at least one segment 61 may be made of a material different from that of the core member 5, may have a friction coefficient different from that of the core member 5 with respect to the glass G, or may have a hardness different from that of the core member 5. In the case where the segment 61 has a higher friction coefficient than the core member 5, the sliding of the conveying roller 2 with respect to the glass G can be suppressed as compared with the case where the segment has the same friction coefficient. In the case where the segment 61 has a lower hardness than the core member 5, damage to the glass G can be reduced as compared with the case where the segment has the same hardness. The material of the segment 61 may be appropriately selected depending on the atmosphere, the temperature, and the like.

Each of the segments 61 may be made of any one of carbon, ceramic, and metal, for example. The carbon is, for example, graphite. The ceramic is, for example, silica, zirconia, alumina, boron nitride, molybdenum disulfide, or tungsten carbide. The metal is, for example, heat resistant steel, or copper. Although not shown, each of the segments 61 may have a multilayer structure in the radial direction of the core member 5, and may include, for example, a metal plate and a ceramic layer. The ceramic layer is formed on the metal plate by sputtering or the like and contacts the glass G.

Preferably at least one of the segments 61 comprises carbon. Carbon has a hardness lower than that of ceramics such as silica, zirconia, or alumina, or metals such as heat-resistant steel. Therefore, by using carbon, damage to the glass G can be reduced. In order to further reduce the damage to the glass G, in the present embodiment, all the fragments 61 contain carbon. However, the carbon-containing segment 61 and the segment 61 containing no carbon may be used in combination. For example, the portion contacting the widthwise central portion of the glass G which is the product uses the segment 61 containing carbon, and the portion contacting the widthwise end portion which is not the product uses the segment 61 containing silica, zirconia, or alumina having a relatively high friction coefficient, whereby the transportation performance can be ensured and the damage can be reduced.

Next, with reference to fig. 4, the conveying roller 2 according to the first modification will be described. The differences from the above embodiments will mainly be described. As shown in fig. 3 (B), the conveying roller 2 of the above embodiment has a circular shape on the outer peripheral surface 53 of the core member 5 when viewed from the axial direction of the core member 5. As shown in fig. 4 (B), the conveying roller 2 of the present modification has a polygonal outer peripheral surface 53 of the core member 5 when viewed in the axial direction of the core member 5.

When the outer peripheral surface 53 of the core member 5 is n-sided (n is an integer of 3 or more) when viewed in the axial direction of the core member 5, n pieces 61 are attached to the core member 5 in the circumferential direction. The number of the segments 61 arranged in the circumferential direction of the core member 5 may be two or more, or n-1 or less. The inner surface 64 of the segment 61 is planar, and the inner surface 64 of the segment 61 has a linear shape when viewed in the axial direction of the core member 5.

Next, with reference to fig. 5, a conveying roller 2 according to a second modification will be described. The differences from the above embodiments will mainly be described. As shown in fig. 3 (a), in the conveying roller 2 of the above embodiment, the plurality of second grooves 63 are connected straight and continuously with the first grooves 62 interposed therebetween. As shown in fig. 5 (a), in the conveying roller 2 of the present modification, the plurality of second grooves 63 are offset in the axial direction of the core member 5 with the first grooves 62 interposed therebetween.

In the above embodiment and the present modification, the plurality of first grooves 62 are connected straight and continuously with the second grooves 63 interposed therebetween, but the plurality of first grooves 62 may be offset in the circumferential direction of the core member 5 with the second grooves 63 interposed therebetween.

Next, with reference to fig. 6, a conveying roller 2 according to a third modification will be described. The differences from the above embodiments will mainly be described. All the segments 61 of the conveying roller 2 of the above embodiment have the same material. The plurality of segments 61A, 61B of the conveying roller 2 of this modification have different materials.

For example, the segment 61A at the axial center of the conveying roller 2 has a lower hardness than the segment 61B at the axial end of the conveying roller 2, and contacts the widthwise center of the glass G, which is the product, to thereby suppress damage to the product of the glass G. The segment 61B at the axial end of the conveying roller 2 has a higher friction coefficient than the segment 61A at the axial center of the conveying roller 2, and contacts the end of the glass G in the width direction, which is not a product, to thereby suppress sliding of the glass G. The widthwise end portion of the glass G is easily grasped, and the glass G can be reliably conveyed.

The segment 61A includes, for example, a carbon plate. The carbon plate is in contact with glass G. The segment 61B includes, for example, a heat-resistant steel plate and a ceramic layer. The ceramic layer is formed on the heat-resistant steel by sputtering or the like, and contacts the glass G. The carbon plate has a lower hardness than the ceramic layer. The ceramic layer has a higher coefficient of friction than the carbon plate. The combination of the materials of the segments 61A and 61B is not particularly limited.

Since the surface member 6 is divided into the plurality of segments 61, the material of the segments 61 can be changed according to the axial position and the circumferential position of the core member 5. The size or shape of the segment 61 may be changed depending on the axial position and the circumferential position of the core member 5, and the groove width of the first groove 62 or the groove width of the second groove 63 may be changed.

Next, with reference to fig. 7, a conveying roller 2 according to a fourth modification will be described. In the present modification, the groove width W2 of the second groove 63 is wider than that of the above-described embodiment, and foreign matter interposed between the glass G and the surface member 6 is allowed to escape into the second groove 63, so that damage to the glass G is easily suppressed. The groove width W2 of the second groove 63 is appropriately designed. The groove width W1 of the first groove 62 is also set appropriately.

Next, with reference to fig. 8, a conveying roller 2 according to a fifth modification will be described. The differences from the above embodiments will mainly be described. As shown in fig. 3 (a), the conveying roller 2 of the above embodiment has the first groove 62 orthogonal to the second groove 63. As shown in fig. 8 (a), the conveying roller 2 of the present modification includes a first groove 62 and a second groove 63 that intersect obliquely.

Next, an example of the relationship between the outer diameter of the core member 5 and the inner diameter of the surface member 6 will be described with reference to fig. 9. In FIG. 9, r1 _before Is the outer diameter, r2, of the core part 5 at room temperature (e.g. 30 ℃) _before Is the inner diameter of the segment 61 at room temperature, r1 _after Is the outer diameter, r2, of the core part 5 at the temperature of use _after Is the inner diameter of the segment 61 at the temperature of use.

r1 _before 、r2 _before And r1 _after The measurement may be performed in a state where the segment 61 is attached to the core member 5, or in a state where the segment 61 is detached from the core member 5, and the measurement may be performed in the same value in any state. r2 _after Measured in a state where the segment 61 is detached from the core member 5. When the segment 61 is detached from the core member 5 at the use temperature, the segment 61 having been enlarged by the core member 5 is reduced in diameter (see the broken line of fig. 9).

The outer peripheral surface 53 of the core member 5 has a circular shape when viewed in the axial direction of the core member 5, and the inner surface 64 of the segment 61 has an arcuate shape. The segment 61 is detachably attached to the outer peripheral surface 53 of the core member 5 using bolts 7. The bolt 7 is provided, for example, at the circumferential center of the segment 61 when viewed from the axial direction of the core member 5. The temperature of the conveyor roller 2 is higher than room temperature, for example, 500 to 800 ℃.

The conveyor roller 2 is assembled at room temperature, and is warmed up from room temperature to the use temperature. In the case where at least one of the segments 61 has a smaller linear expansion coefficient than the core member 5, thermal stress may be generated due to the difference in linear expansion coefficients of the core member 5 and the segments 61. Let r1 be _before And r2 _before Similarly, the thermal stress generated at the use temperature is excessive, and the fracture 61 may be broken.

Therefore, the segment 61 preferably having a linear expansion coefficient smaller than that of the core member 5 has an inner diameter (r 1) larger than that of the core member 5 at room temperature _before ＜r2 _before ) And has an inner diameter (r 2) smaller than the outer diameter of the core member 5 when detached from the core member 5 at the use temperature _after ＜r1 _after )。

At "r1 _before ＜r2 _before If "true," R1 _before ＝r2 _before In comparison with the case where "is established", thermal stress generated at the use temperature can be reduced. In addition, "r 2" under conceivable conditions of use temperature region and dimensional tolerance _after ＜r1 _after When "is satisfied," the core member 5 can be brought into close contact with the segment 61 at the use temperature. In addition, r1 is preferable _after －r2 _after > 0.1mm. In this way, the core member 5 and the segment 61 can be more reliably brought into close contact with each other.

r1 _before And r2 _before The conditions such as the use temperature of the conveying roller 2 (more precisely, the difference between the use temperature and the room temperature), the linear expansion coefficient of the core member 5, the linear expansion coefficient of the segment 61, the thickness of the segment 61, and the bending strength of the segment 61 are taken into consideration. An example of these conditions is shown below.

Temperature of use of the conveying roller 2: 600 DEG C

Temperature difference between room temperature and use temperature: 570 DEG C

Linear expansion coefficient of the core member 5 (heat resistant steel): 18.7X10 ^－6 /℃

Fragment 61 (carbon)Linear expansion coefficient of (c): 5.0X10 ^－6 /℃

Thickness of the segment 61 (carbon): 15mm of

Flexural strength of the segment 61 (carbon): 48MPa.

Under the above conditions, if r1 _before 160.00mm, r2 _before 161.00mm, r1 _after 161.71mm, r2 _after Is 161.46mm. As a result, the maximum stress generated by the segment 61 was 6.3MPa. If the maximum stress of the segment 61 is suppressed to 1/4 or less of the bending strength of the segment 61, breakage of the segment 61 can be suppressed.

In this way, by applying bending stress to the segment 61 at the use temperature, the relative displacement or vibration of the core member 5 and the segment 61 can be eliminated. The method of applying bending stress to the segment at the use temperature is not limited to the above method, and may be realized by inserting the filler member 100 between the segment 61 and the core member 5 as shown in fig. 13, for example. As the filler member 100, for example, a carbon felt or a leaf spring is preferably used. As a material of the plate spring, for example, nichrome is preferably used. When such a filler member 100 is inserted, the segment 61 having a smaller linear expansion coefficient than the core member 5 has an inner diameter (r 1) larger than the outer diameter of the core member 5 at room temperature _before ＜r2 _before ) But may also have an inner diameter (r 1) larger than the outer diameter of the core member 5 at the use temperature _after ＜r2 _after ). Since the segment 61 has a smaller linear expansion coefficient than the core member 5, the gap between the segment 61 and the core member 5 becomes smaller at the use temperature than at the room temperature, and the filler member 100 contracts in the radial direction of the core member 5, thereby imparting a larger bending stress to the segment 61 than at the room temperature.

Next, an example of the through groove 66 will be described with reference to fig. 10. As shown in fig. 10, the segment 61 may have a through groove 66 penetrating the segment 61 in the axial direction of the core member 5 on an inner surface 64 facing the outer peripheral surface 53 of the core member 5. Although the bending deformation amount of the segment 61 is the same regardless of the presence or absence of the through groove 66, if the through groove 66 is present, the bending rigidity of the segment 61 is lowered.

When the temperature of the conveyor roller 2 increases from room temperature to the use temperature, the segment 61 is deformed by bending due to the difference in linear expansion coefficient between the core member 5 and the segment 61. When the bending deformation amounts of the segments 61 are the same, the lower the bending rigidity of the segments 61 is, the smaller the maximum stress generated by the segments 61 is. Therefore, the through groove 66 can reduce the maximum stress of the segment 61, and can suppress breakage of the segment 61.

Next, an example of the bolt 7 will be described with reference to fig. 11. In order to fix the segment 61 to the core member 5, the conveying roller 2 is provided with, for example, bolts 7. The bolt 7 includes a shaft portion 71 screwed into the bolt hole 54 formed in the outer peripheral surface 53 of the core member 5, and a head portion 72 pressing the segment 61 from the opposite side of the core member 5.

As shown in fig. 11, the segment 61 may have a receiving hole 67 in the outer surface 65 that contacts the glass G, and the receiving hole 67 may receive the head 72 of the bolt 7. The receiving hole 67 receives the head 72 of the bolt 7, thereby preventing the head 72 from colliding with the glass G and suppressing the occurrence of damage.

The segment 61 has a through hole 69, and the through hole 69 is penetrated by a shaft portion 71 of the bolt 7. The through hole 69 is formed in the inner bottom surface of the accommodation hole 67. A washer 9 may be provided between the inner bottom surface of the receiving hole 67 and the head 72 of the bolt 7.

Next, an example of two segments 61 adjacent in the circumferential direction of the core member 5 will be described with reference to fig. 12. As shown in fig. 12, two segments 61 adjacent to each other in the circumferential direction of the core member 5 may be overlapped with each other. The glass G can be supported over the entire circumference of the core member 5, deformation of the glass G can be suppressed, and occurrence of damage can be suppressed.

Each of the segments 61 has, for example, an arcuate outer shell 611 or an arcuate inner shell 612 at one end in the circumferential direction of the core member 5, as viewed in the axial direction of the core member 5. The outer shell 611 overlaps with the inner shell 612 in the radial direction of the core member 5. The housing 611 supports the glass G by contacting the glass G.

The conveying roller and the glass manufacturing method according to the present disclosure have been described above, but the present disclosure is not limited to the above embodiments and the like. Various changes, modifications, substitutions, additions, omissions, and combinations thereof may be made within the scope of the claims. Of course, these also fall within the technical scope of the present disclosure.

Claims (9)

1. A conveying roller for conveying glass, wherein,

the conveying roller is provided with: a rotation shaft; a core member that rotates together with the rotation shaft; and a surface member attached to an outer peripheral surface of the core member,

the surface member is divided into a plurality of segments in a circumferential direction and an axial direction of the core member.

2. The conveyor roller according to claim 1, wherein,

at least one of the segments has a different material than the core member.

3. The conveying roller according to claim 1 or 2, wherein,

at least one of the segments comprises carbon.

4. The conveying roller according to any one of claims 1 to 3, wherein,

the plurality of segments are made of different materials.

5. The conveying roller according to any one of claims 1 to 4, wherein,

the use temperature of the conveying roller is higher than the room temperature,

the bending stress applied to at least one of the segments is greater at the use temperature than at room temperature.

6. The conveying roller according to any one of claims 1 to 5, wherein,

a filler member is interposed between at least one of the segments and the core member.

7. The conveying roller according to any one of claims 1 to 5, wherein,

the outer peripheral surface of the core member has a circular shape when viewed from the axial direction of the core member, the inner surfaces of the segments have a circular arc shape,

the use temperature of the conveying roller is higher than the room temperature,

at least one of the segments has a smaller linear expansion coefficient than the core member, an inner diameter at room temperature that is larger than the outer diameter of the core member, and an inner diameter at the use temperature that is smaller than the outer diameter of the core member when detached from the core member.

8. The conveying roller according to any one of claims 1 to 7, wherein,

the segment has a material different from each other at an axial center portion and an axial end portion of the conveying roller, and a coefficient of friction between the segment and the glass at the axial end portion of the conveying roller is larger than a coefficient of friction between the segment and the glass at the axial center portion of the conveying roller.

9. A glass manufacturing method, comprising:

shaping the glass; and

conveying the formed glass using the conveying roller according to any one of claims 1 to 8.

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