KR20160032692A - Device for conveying glass ribbon, device for manufacturing glass plate, method for manufacturing glass plate, method for detecting failure conveying roll and method for preventing defect occurrence in glass ribbon - Google Patents

Abstract

The present invention relates to a device for conveying a glass ribbon comprising: a plurality of conveying rolls which convey a large-sized glass ribbon; a conveyor instrument to move any one of the conveying rolls in an axial direction of the conveying rolls with respect to the glass ribbon; and a contact separation instrument to contact or separate any one of the conveying rolls with respect to the glass ribbon. In the present invention, at least two of the conveying rolls have different roll diameters. The device for conveying a glass ribbon in the present invention can detect a defective conveying roll in an early stage of the process.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass ribbon conveying apparatus, a glass sheet producing apparatus, a glass sheet producing method, a method of specifying a roll for defective conveyance, and a method of preventing scratches in a glass ribbon. FOR DETECTING FAILURE CONVEYING ROLL AND METHOD FOR PREVENTING DEFECT OCCURRENCE IN GLASS RIBBON}

The present invention relates to a glass ribbon conveying apparatus, a glass sheet producing apparatus, a glass sheet producing method, a method of specifying a defective conveying roll, and a method of preventing scratches in a glass ribbon.

In the apparatus for producing a glass plate by the float method, a molten glass dissolved in a glass melting furnace is supplied onto a molten tin of a float bath to be molded into a large-sized glass ribbon, and the formed glass ribbon is removed from the float bath by a lift- Cooled to a temperature not higher than the distortion point of the glass in the annealing furnace, further cooled to a temperature at which it can be cut with the cooling rare, and cut to a predetermined size by a cutting device.

In the glass plate manufacturing apparatus, a glass ribbon conveying device is provided in the slow cooling furnace and the cooling rib (for example, see Patent Document 1). The glass ribbon conveying apparatus has a plurality of conveying rolls for conveying glass ribbon. The glass ribbon formed in the float bath is cooled while being conveyed at a predetermined speed by the conveying roll in the slow cooling furnace and the cooling rare. The slow cooling furnace has a length of, for example, 20 to 200 m, since the hot glass ribbon immediately after the formation must be gradually cooled to a gentle temperature gradient, and the cooling rare is still at a high temperature of 200 to 250 ° C Lt; / RTI > requires a similarly long cooling zone in order to cool the glass ribbon in the < RTI ID = 0.0 >

While the glass ribbon is conveyed by the conveying rolls of the slow cooling furnace and the cooling rare, the glass ribbon is sometimes scratched (including cracks) by the conveying roll. It is considered that the scratches are caused by adhering to the surface of the transporting roll or scratches on the surface of the roll. The defective glass ribbon becomes defective and deteriorates in quality and yield. In addition, in the case of a thin glass ribbon, the defective glass ribbon tends to be broken during transportation on the roll. Therefore, it is extremely important to quickly specify and take measures for the transport rolls causing scratches.

Japanese Patent Application Laid-Open No. 2009-155164

However, since many rollers (for example, 40 to 1000 rollers) are provided in the slow cooling rollers and the cooling rollers, and the scratches and deposits on the surface of the transport rollers are minute, It is very difficult to specify whether or not it has occurred in the roll. Therefore, a method of lowering the transport rolls one by one in order and separating them from the glass ribbon, and specifying the transport rolls in which the occurrence of scratches is eliminated is specified as a bad transport roll.

However, in this method, it takes a long time to specify the roll for defective carrying, and scratches are generated in the meantime.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a glass ribbon transporting apparatus capable of specifying a poor transport roll early.

In order to solve the above-described problems, the present invention provides a printing apparatus comprising: a plurality of transport rolls for transporting a large-sized glass ribbon; A moving mechanism for moving one of the plurality of transport rolls with respect to the glass ribbon in the axial direction of the transport roll; And a contact separating mechanism for making one of the plurality of conveying rolls approach or separate from the glass ribbon, wherein the plurality of conveying rolls are arranged such that at least two of the conveying rolls have different roll diameters Thereby providing a ribbon transport apparatus.

According to the present invention, it is possible to provide a glass ribbon transporting apparatus capable of early specifying a poor transport roll.

Fig. 1 is a side view of a glass plate producing apparatus provided with a glass ribbon transporting apparatus according to an embodiment of the present invention.
Fig. 2 is a partially enlarged view of the glass ribbon transporting apparatus of Fig. 1. Fig.
Fig. 3 is an explanatory diagram (1) of a method for specifying a poor transport roll.
Fig. 4 is an explanatory diagram (2) of a method for specifying a poor transport roll.
5 is a side view of an example of the moving mechanism and the contact separation mechanism.
Fig. 6 is a rear view of Fig. 5. Fig.

Hereinafter, the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and substitutions may be made without departing from the scope of the present invention. .

Fig. 1 is a side view of a glass plate producing apparatus provided with a glass ribbon conveying apparatus, which is an embodiment of the present invention. In the glass plate producing apparatus according to this float method, the molten glass obtained in the glass melting furnace 1 is supplied onto the molten tin of the float bath 2 to be molded into a large-sized glass ribbon 5. The formed glass ribbon 5 is pulled up from the float bath 2 by a lift-out roll and taken out, then slowly cooled to a temperature not higher than the glass distortion point in the slow cooling furnace 3 while being conveyed by the glass ribbon conveying device, Further cooled down to a temperature at which it can be cut in the cooling rheel 4, and cut to a predetermined size by the cutting device 7. As described above, a glass plate of a predetermined size is obtained by the glass plate manufacturing method using the glass plate producing apparatus of one embodiment of the present invention. The molding of the glass ribbon 5 is excellent in terms of quality and productivity, and may be performed by any other molding method (for example, a fusion method).

The glass ribbon transport apparatus of the present embodiment is installed in the gradual cooling furnace 3 and / or the cooling rare 4. This glass ribbon conveying apparatus has a plurality of kinds of conveying rolls 6 having different roll diameters. Each of the transport rolls 6 is rotated so that the peripheral speeds become substantially equal, and the glass ribbon 5 is transported in a predetermined direction. The conveying speed is almost the same as the peripheral speed of each of the conveying rolls 6.

According to this glass ribbon transport apparatus, on the basis of the roll diameter of the transport roll 6 and the period of a plurality of scratches appearing at intervals in the transport direction (longitudinal direction) of the glass ribbon 5, The transporting roll 6 can be indexed and specified. Further, a plurality of kinds of transporting rolls may be arranged for every predetermined number, that is, a predetermined number.

In the present embodiment, arranging a plurality of kinds of transport rolls 6 having different roll diameters is effective in reducing the number of the slow cooling passages 3 and / or the cooling rare areas 4, which are likely to be scratched during transportation of the glass ribbon 5 Is a target for the transporting roll 6 of the transporting roll. Particularly, since the temperature of the glass ribbon 5 is high, the transfer roll 6 of the gradual furnace 3 that conveys the glass ribbon 5 immediately after the formation is scratched by the transfer roll 6, It is preferable that the glass ribbon 5 is given priority because it has a large influence on the glass ribbon 5. Further, when the occurrence status of the scratches is known empirically, only a part of the conveying rolls 6 having a large frequency of occurrence of scratches in each of the slow cooling furnace 3 and the cooling rare 4 is conveyed to a plurality of kinds of conveying rolls For example.

In this embodiment, it is not limited to how many rolls of different roll diameters are arranged on the slow cooling furnace 3 and / or the cooling rare 4. Since the number of rolls of the same diameter is reduced by providing many kinds of roll diameters, it is possible to detect and identify the poor roll for the defective carrying which is a cause of scratches in a short time. On the other hand, by providing less types of transport rolls having different roll diameters, it is possible to suppress the burden of controlling the number of revolutions per roll diameter for achieving the transport speed. Also, the burden of management of the preliminary transporting roll can be suppressed.

Next, an example of a method for specifying a defective carrying roll will be described.

First, the roll diameter of the transporting roll that generates the scratches is calculated from the period of scratches. Next, about half (for example, four) of a plurality of (for example, eight) transport rolls having the calculated roll diameter are lowered, and only the remaining half of the rolls are rotated while being in contact with the glass ribbon. Thereafter, it is checked whether or not the scratches are generated, and the number of the roll groups causing the scratches is determined in accordance with the result.

Here, it is preferable that the drop width of the transport roll is 20 to 50 mm. The drop of the conveying roll is more preferably 25 mm or more. Further, the drop of the transporting roll is more preferably 40 mm or less. If the dropping width of the transporting roll is 20 mm or more, the transporting roll can be separated from the glass ribbon even if the glass ribbon is deformed by its own weight. On the other hand, when the drop width of the transport roll is 50 mm or less, it is easy to move the transport roll, and there is no need to enlarge the glass ribbon transport apparatus.

Next, about half (for example, two) of the plurality of (for example, four) transport rolls belonging to the roll group causing the scratches are lowered, and only the remaining half of the rolls are rotated while being in contact with the glass ribbon. Thereafter, similarly, the number of rolls causing the scratches is specified by two. This is repeated to specify a poor conveying roll which finally generates a scratch.

This method is more preferable as the number of rolls of the same diameter is larger. In this method, when the number of conveying rolls of the same diameter is a power of 2, the efficiency for specifying the poor conveying roll is good. When the number of transporting rolls is an odd number (for example, 9), a number close to half (for example, five or four) may be lowered.

Here, in the case where the transport rolls of the same diameter are continuously arranged, it is preferable that the transport rolls are lowered at one interval in consideration of the load applied to the glass ribbon being transported. It is preferable to arrange the rolls of the same diameter so as to be 8 to 32 continuously. Particularly, when the number of conveying rolls having the same diameter is a power of 2 (8, 16, or 32), efficiency in specifying the poor conveying roll is good.

Fig. 2 is a graph showing the relationship among four kinds of transport rolls 6a to 6d having different roll diameters in the order of (A) to (D) groups in which the roll diameter is large in the transport direction This is an example of deployment. The arrangement order may be a sequence of smaller roll diameters, and the order of the roll diameters may not be in order. For example, the number of groups (A) may be divided into (A), (B), (A), (C), and (D). Although only four rolls are arranged in each group in FIG. 2, it is preferable that the number of rolls is eight to 32. Further, the number of rolls arranged in each group may be the same or not.

By arranging the conveying rolls 6a to 6d in this manner, when the period of the scratches formed on the glass ribbon 5 is detected, the conveying rolls that generate the scratches among the groups having the same circumferential length as the above- It is proved that it is included. That is, a group including a transporting roll that caused a scratch is detected. For example, when a group (B) is detected, (B) a conveying roll which is a cause of scratches in the group is included. Therefore, it is not necessary to specify a transport roll which is a cause of scratches in the entire transport roll as in the prior art, and (B) the transport rolls in the group can be specified. Therefore, The time required to specify the roll is theoretically shortened to one quarter. Further, the specification of the defective conveying roll which is a cause of scratches in the group (B) is such that, for example, the conveying rolls in the group are sequentially lowered to separate them from the glass ribbon 5, And the conveying rolls in which scratches are removed by observation are specified as defective rolls. The specified transporting roll is taken out from the transporting line in the lowered state, and replaced with a spare transporting roll.

The relationship between the transport rolls having different roll diameters and the scratches on the glass ribbon 5 caused by the transport rolls will be further described. Fig. 3 shows the relationship between the period of the scratches and the conveying rolls causing the scratches. In order to make it easier to understand the relationship between the cycle of the scratches and the conveying rolls that generate the scratches, three conveying rolls 6a, 6b and 6c each having three roll diameters are arranged one by one. When scratches are formed on the lower surface of the glass ribbon 5 by the adherend 8 on the roll surface of the transport roll 6a, scratches occur every time the transport roll 6a makes one revolution, (Interval) equal to the circumferential length of the conveying roll 6a is generated in the conveying roll 5 in the conveying direction. The period of the scratches 9b generated on the lower surface of the glass ribbon 5 by the adherend 9 on the roll surface of the transport roll 6b is equal to the circumferential length determined by the roll diameter of the transport roll 6b The period of the scratches 10c generated on the lower surface of the glass ribbon 5 by the adherend 10 on the roll surface of the transport roll 6c is equal to the period of the circumferential length of the circumferential groove 10c determined according to the roll diameter of the transport roll 6c Becomes equal to the length.

Therefore, it can be easily known that the conveying roll that generated the scratch 8a from the cycle of the scratches 8a generated in the glass ribbon 5 is the conveying roll 6a. Similarly, it can be seen that the carrying rolls 6b and 6c, which generate the scratches 9b and 10c from the period of the scratches 9b and 10c, are the carrying rolls 6b and 6c, respectively.

As described above, according to the method of specifying the defective conveying roll, it is possible to specify the defective conveying roll which is a cause of occurrence of scratches, which has so far required a long time, in a fraction of a time , The yield of the glass ribbon can be improved.

Next, another example of a method for specifying a defective carrying roll will be described with reference to Fig. In this example, while specifying the defective conveying roll, all of the conveying rolls rotate while contacting the lower surface of the glass ribbon.

Fig. 4 is an explanatory diagram (2) of a method for specifying a poor transport roll. 4, the state shown by the solid line is a state before the transporting roll is moved in the axial direction (that is, the width direction of the glass ribbon) with respect to the glass ribbon, and the state shown by the chain double- In the direction of arrow A) with respect to the glass ribbon.

As shown in Fig. 4, the large-sized glass ribbon 5 is transported on the transport roll 6. Therefore, if the deposit 14 is attached to the outer circumferential surface of the conveying roll 6, a scratch 15 is formed on the surface of the glass ribbon 5 every time the conveying roll 6 makes one rotation. The scratches 15 appear periodically with an interval L in the conveying direction of the glass ribbon 5 (the direction of the arrow B). The distance L is substantially equal to the outer circumferential length of the conveying roll 6, and therefore is determined according to the roll diameter (outer diameter) of the conveying roll 6. The position of the scratch 15 of the glass ribbon 5 also moves in the direction of the arrow A when the carrying roll 6 is moved in the axial direction (the direction of the arrow A) with respect to the glass ribbon 5. [ At this time, the movement distance W1 of the scratches 15 is almost the same as the movement distance W2 of the transport rolls 6.

Therefore, when specifying the defective conveying roll, the roll diameter of the conveying roll causing the scratches is first calculated from the period of the scratches (that is, the interval L). Next, about a half (for example, four) of the plurality of (for example, eight) transport rolls having the calculated roll diameter are moved by a predetermined amount relative to the glass ribbon in the respective axial directions . Then, whether or not the position of the scratches of the glass ribbon moves by the predetermined amount in the direction of the arrow A is examined, and the number of the roll groups causing the scratches is specified by two.

Here, the axial movement distance W2 of the transport roll is preferably 0.5 to 5 cm. The moving distance W2 is more preferably 1 cm or more. The moving distance W2 is more preferably 2 cm or less. If the moving distance W2 is 0.5 cm or more, it is possible to confirm whether or not the scratches are moved. On the other hand, when the moving distance W2 is 5 cm or less, it is easy to move the transport roll, and there is no need to enlarge the glass ribbon transport device.

4, a mark member (not shown) movable in the direction parallel to the axial direction of the transport roll 6 is provided above the glass ribbon 5, for example, It is preferable that the light guide plate 18 is provided. The marking member 18 may be positioned before the movement of the transporting roll 6 so that the scratches 15 pass under the marking member 18.

Next, about a half (for example, two) of a plurality of (for example, four) transport rolls belonging to the roll group causing the scratches are moved with respect to the glass ribbon in the respective axial directions. Thereafter, similarly, the number of rolls causing the scratches is specified by two. This is repeated to specify a poor conveying roll which finally generates a scratch.

This method is more preferable as the number of rolls of the same diameter is larger. In this method, when the number of conveying rolls having the same diameter is a power of 2, the efficiency for specifying the poor conveying roll is good. In addition, when the number of conveying rolls is an odd number (for example, 9), a number close to half (for example, five or four) may be moved in the axial direction.

According to this method, when specifying the defective conveying roll, the conveying roll is moved in the axial direction with respect to the glass ribbon, so that all of the conveying rolls are in contact with the lower surface of the glass ribbon. As a result, the glass ribbon can be prevented from being deformed by its own weight.

The thus defective conveying roll is spaced downward relative to the glass ribbon being conveyed. This makes it possible to prevent scratches on the glass ribbon. Thereafter, the defective conveying roll is brought into contact with the glass ribbon at a proper time, after the repair such as surface polishing or the like is carried out or after the replacement with the preliminary conveying roll. As described above, when the defective conveying roll is separated from the glass ribbon at the time of repair or replacement, the operation is easy.

An auxiliary roll (not shown) may be provided between two adjacent transfer rolls in order to restrict the glass ribbon from being excessively deformed by its own weight. The upper end of the sub-roll is disposed below the upper end of the transport roll for transporting the glass ribbon.

In the present embodiment, any one of the plurality of transport rolls having a predetermined roll diameter is repeatedly moved in the axial direction with respect to the glass ribbon to specify the poor transport roll, but the present invention is not limited to this . For example, in a state in which a candidate for a defective conveying roll is compressed by separating any one of three or more conveying rolls having a predetermined roll diameter from the glass ribbon, and all the remaining two or more candidates are brought into contact with the glass ribbon, The defective conveying roll may be specified by moving any one of the remaining two or more candidates with respect to the glass ribbon in the axial direction. The candidate for the defective carrying roll is compressed by moving any one of three or more carrying rolls having a predetermined roll diameter in the axial direction with respect to the glass ribbon so that any one of the remaining two or more candidates is spaced apart from the glass ribbon The roll for defective conveyance may be specified.

In an embodiment of the present invention, the glass ribbon transport apparatus is provided with a moving mechanism and a contact separation mechanism. The moving mechanism is a mechanism connected to any one of the plurality of transport rolls and for moving the connected transport rolls in the axial direction with respect to the glass ribbon. The contact separating mechanism is a mechanism connected to any one of the plurality of conveying rolls and for making the connected conveying rolls approach or separate from the glass ribbon.

The moving mechanism may be connected to any one of a plurality of transport rolls having almost the same roll diameter, and may be connected to each of these transport rolls one at a time. This makes it possible to improve the workability in specifying the defective carrying roll.

It is also preferable that the moving mechanism is connected to a carrying roll which is likely to cause a problem. As a transport roll which is liable to cause a problem, there is a transport roll disposed in an upstream region of the slow cooling path.

Similarly, the contact separating mechanism may be connected to any one of a plurality of conveying rolls having almost the same roll diameter, or may be connected to each of these conveying rolls one by one. This makes it possible to improve the workability in specifying the defective carrying roll.

The contact separation mechanism may be provided for each of the transport rolls irrespective of the roll diameter. This makes it possible to improve workability in repairing and replacing the transport roll.

Hereinafter, specific examples of the moving mechanism and the contact separation mechanism will be described with reference to Figs. 5 and 6, but the present invention is not limited thereto.

The contact separating mechanism 20 is a mechanism for making the transporting roll 6 approach or separate from the glass ribbon 5. [ For example, the contact separating mechanism 20 is constituted by the base 21, the shaft 22, the arm 23, the link 24, and the like as shown in Figs. 5 and 6. These constituent members 21 to 24 are provided at one end portion in the axial direction of the conveying roll 6. The other end in the axial direction is not limited to the form of the constituent members 21 to 24, and the carrying roll 6 is configured to be movable in the direction of the arrow C.

The platform 21 is fixed to the furnace wall of the slow cooling furnace 3 or to the bottom (not shown) outside the furnace frame of the annealing furnace 3. One end of the arm 23 is supported by the base 21 via the shaft 22. The central portion of the arm 23 rotatably supports the rotary shaft 61 of the conveying roll 6. The other end of the arm 23 is suspended in the base 21 via a link 24. The link 24 is suspended from the mount 21 and is movable relative to the mount 21 in the axial direction of the link 24 (up and down in FIG. 5) and in the direction perpendicular to the axis .

This contact / separation mechanism 20 allows the arm 23 to be rotated about the axis of the shaft 22 by an arrow C (or by a suitable driving device) by adjusting the relative position of the mount 21 and the link 24 manually It is possible to move the transfer roll 6 supported by the arm 23 via the rotary shaft 61 toward or away from the glass ribbon 5. [

The moving mechanism 30 is a mechanism for moving the transporting roll 6 in the axial direction (direction of arrow D) with respect to the glass ribbon 5. [ For example, the moving mechanism 30 is constituted by the base 21, the shaft 22, the arm 23, the link 24 and the like as shown in Figs. 5 and 6.

The shaft 22 is configured not to move with respect to the base 21 in the axial direction (the direction of arrow D) of the transporting roll 6. [ One end of the arm 23 is configured to be movable with respect to the shaft 22 in the direction of the arrow D. The central portion of the arm 23 is configured so as to be able to move integrally with the rotary shaft 61 of the carrying roll 6 in the direction of the arrow D. One end of the link 24 is fixed to the mount 21. The arm 23 is configured to be movable in the direction of arrow D with respect to the other end of the link 24. When the one end of the link 24 is released, the link 24 is movable in the direction of the arrow D.

As described above, the moving mechanism 30 is configured such that the shaft 22 can not move in the direction of the arrow D with respect to the base 21 (and further the glass ribbon 5), and the arm 23, the rotating shaft 61, (6) is integrally movable in the direction of the arrow D as shown in Fig.

With this movement mechanism 30, the transporting roll 6 is moved in the direction of the arrow D to the glass ribbon 5 by manually (or by a suitable drive device) the transporting roll 6 in the direction of the arrow D It is possible to move it.

The shaft 22 can not move in the direction of the arrow D with respect to the base 21 (and furthermore the glass ribbon 5) and the arm 23, the rotating shaft 61, It is possible to move integrally in the direction of the arrow D, but the present invention is not limited to this. The shaft 22 and the arm 23 can not move in the direction of the arrow D with respect to the base 21 (or the glass ribbon 5) and the rotating shaft 61 and the carrying roll 6 are moved in the direction of the arrow D Or may be integrally movable in the direction of the arrow. In other words, the rotary shaft 61 may be relatively movable in the direction of the arrow D with respect to the arm 23. In this case, a limiting means such as a stopper for limiting the moving range of the transporting roll 6 in the direction of arrow D may be provided.

A drive system 40 for rotationally driving the transport roll 6 is connected to one axial end side of the transport roll 6. 5 and 6, the drive system 40 is constituted by a roll side gear 41, an intermediate gear 42, a drive side gear 43, a rotary shaft 44, a drive device 45 and the like do.

The roll side gear 41 is coaxially mounted on the rotary shaft 61 of the conveying roll 6 and rotates together with the conveying roll 6. The roll side gear 41 is configured to be movable with respect to the intermediate gear 42 in the direction of the arrow D. The teeth of the roll side gear 41 extend obliquely with respect to the axial line.

The intermediate gear 42 is interposed between the roll side gear 41 and the drive side gear 43. The intermediate gear 42 is coaxially connected to the shaft 22 and is rotatable about the axis of the shaft 22. The axis of the intermediate gear 42 is disposed parallel to the axis of the roll-side gear 41 and perpendicular to the axis of the drive-side gear 43.

The drive side gear 43 is coaxially connected to the rotating shaft 44. [ The rotating shaft 44 is connected to a driving device 45 such as an electric motor.

The driving device 45 may be fixed to the mount 21 or may be fixed on the bottom of the furnace frame outside the gradual cooling furnace 3 and fixed. The drive device 45 is controlled by the control device such as a microcomputer to drive the transporting roll 6 via the rotating shaft 44, the drive gear 43, the intermediate gear 42 and the roll side gear 41, . The driving device 45 may transmit the rotational force to the rotating shaft 44 via the chain or the belt.

According to this drive system 40, since the intermediate gear 42 and the roll side gear 41 are engaged when the transporting roll 6 is brought into contact with and separated from the glass ribbon 5 by using the contact separation mechanism 20, It is possible to drive the roll 6 for rotation. The circumferential speed of the transporting roll 6 can be adjusted to the transporting speed of the glass ribbon 5 when the transporting roll 6 is brought into contact with and separated from the glass ribbon 5 by using the contact separating mechanism 20 , It is possible to reduce the load on the glass ribbon 5 being conveyed.

In this embodiment, when the rotational force of the drive device 45 is transmitted to the conveying roll 6, the conveying roll 6 is pressed in the axial direction. This is because the teeth of the roll side gear 41 extend obliquely with respect to the axial line as described above. Therefore, a positioning plate (not shown) for preventing the carrying roll 6 from moving in the axial direction is provided on the other axial end side of the carrying roll 6. The positioning plate is movably fixed with respect to the table 21, and is moved as required.

The glass ribbon continuously conveyed has been described above. However, the present invention is not limited to this, and the present invention is also applicable to the transportation of a glass sheet cut into a rectangular shape or the like. However, considering early detection and prevention of scratches and the like, it is preferable to apply to a glass ribbon which is continuously transported.

The present application is based on Japanese Patent Application No. 2014-188017 filed on September 16, 2014, the contents of which are incorporated herein by reference.

INDUSTRIAL APPLICABILITY The present invention can be used as a glass ribbon conveying apparatus in a slow cooling furnace and a cooling rare in a glass plate manufacturing apparatus, and is particularly suitable as a glass ribbon conveying apparatus in a slow cooling furnace and a cooling rare in a glass plate manufacturing apparatus by a float method.

1: Glass melting furnace
2: Float bath
3:
4: Cooling rare
5: Glass ribbon
6: Roll for conveying
6a: roll for conveying
6b: roll for conveying
6c: roll for conveying
6d: Roll for conveying
7: Cutting device
8: Attachment
8a: scratches
9: Attachment
9b: Scratches
10: Attachment
10c: scratches
14: Attachment
15: scratches
20: contact separation mechanism
30:

Claims (9)

A plurality of conveying rolls for conveying the large-sized glass ribbon;
A moving mechanism for moving one of the plurality of transport rolls with respect to the glass ribbon in the axial direction of the transport roll; And
A plurality of conveying rolls for conveying the glass ribbon,
Wherein the plurality of transport rolls have different roll diameters of at least two transport rolls among the plurality of transport rolls. The method according to claim 1,
Wherein the contact separation mechanism comprises:
A base fixed to the furnace wall of the annealing furnace or to the floor outside the furnace frame of the annealing furnace,
Wherein the one end portion is supported on the base through a shaft, the central portion rotatably supports the rotation shaft of the transporting roll, and the other end portion includes an arm suspended from the base via a link,
And the link is configured to be movable with respect to the mount in the axial direction of the link. 3. The method according to claim 1 or 2,
Wherein the moving mechanism comprises:
A base fixed to the furnace wall of the annealing furnace or to the floor outside the furnace frame of the annealing furnace,
Wherein the one end portion is configured to be movable with respect to the shaft in the axial direction of the transporting roll and the central portion is provided with an arm which is configured to be movable integrally with the rotation axis of the transporting roll in the axial direction of the transporting roll Glass ribbon transfer device. A glass sheet manufacturing apparatus comprising the glass ribbon transporting apparatus according to any one of claims 1 to 3. A glass plate manufacturing method using the glass plate manufacturing apparatus according to claim 4. A bad conveying roll for generating the scratches on the basis of a roll diameter of each conveying roll used in the glass ribbon conveying apparatus according to claim 1 and a plurality of period of scratches spaced apart in the conveying direction of the glass ribbon Of the rolls. The method according to claim 6,
And a defective conveying roll for specifying the defective conveying roll by moving any one of the plurality of conveying rolls with respect to the glass ribbon in the axial direction of the conveying roll to check whether the glass ribbon is moved to a flaw position, Specific method. 8. The method according to claim 6 or 7,
Wherein the defective conveying roll is specified by checking whether any one of the plurality of conveying rolls is spaced apart from the glass ribbon to check whether the glass ribbon is scratched or not. A method for preventing scratches in a glass ribbon, wherein the defective conveying roll specified by the method according to claim 6 or 7 is spaced apart from the glass ribbon to prevent the scratches from occurring in the glass ribbon.

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