WO2020110634A1 - Device for measuring glass sheet - Google Patents

Abstract

A device 1 for measuring a glass sheet measures shape data including the straightness of a rectangular glass sheet G, wherein the device 1 for measuring a glass sheet is provided with: a table 2 having a mounting section 2x on which the glass sheet G is placed; a distance meter 3 for measuring the distance to an end surface to be measured of the glass sheet G placed on the mounting section 2x; a holding mechanism 4 for holding the distance meter 3 so that the distance meter 3 is movable in a first direction in which the distance meter 3 moves away from the end surface Ga to be measured and in a second direction along the end surface Ga to be measured; a straightedge 5 extending in the second direction; and a follower mechanism 6 for aligning the distance meter 3, which is held by the holding mechanism 4, along the straightedge 5.

Description

Glass plate measuring device

The present invention relates to a glass plate measuring device for measuring shape data of a glass plate including straightness of an end surface of the glass plate.

The glass plate manufacturing process includes a cutting process for cutting the glass plate into a predetermined size, and an end face processing process for finishing the cut end face of the glass plate such as chamfering.

In the end face processing process, the glass plate is positioned with reference to the cut end face, and in various processes after the end face processing process, the glass plate is generally positioned with reference to the finished end face.

Therefore, for example, for the purpose of performing accurate positioning, after the cutting process and the end face processing process, a shape measurement process for measuring the shape data of the glass plate including the straightness (straightness) of the end face of the glass plate is performed. May be done. Here, the straightness means the magnitude of deviation from a geometrically correct straight line of a straight line shape.

As one of the glass plate inspection methods, there is a method of taking an image of the end surface of the glass plate from above with a camera and analyzing the imaged image (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2018-112411

As a method of measuring the straightness of the end face of the glass plate, a method of applying the inspection method of Patent Document 1 described above, capturing an image of the end face of the glass plate from above with a camera, and analyzing the captured image is conceivable. However, the glass plate is often transparent except for some special glasses. Therefore, in the method of measuring the straightness of the end surface of the glass plate using image analysis, it is difficult to accurately detect the boundary between the end surface of the glass plate and its background, and there is a problem that advanced image analysis is required. In particular, such a problem becomes more remarkable as the glass plate becomes thinner.

Also, the shape data of various glass plates including the straightness of the end faces of the glass plates are often measured in different areas. Therefore, it takes time to move between measurement areas, so that the measurement efficiency is poor, and there is room for improvement from the viewpoint of space saving.

The first object of the present invention is to measure the straightness of the end surface of the glass plate easily and reliably.

The second object of the present invention is to efficiently measure various shape data including the straightness of the end surface of the glass plate in a small space.

Furthermore, the third object of the present invention is to easily and surely measure the shape data of the glass plate and to maintain the measurement accuracy for a long period of time.

The first invention devised to solve the above first problem is a glass plate measuring device for measuring the straightness of a rectangular glass plate, the mounting portion on which the glass plate is mounted. Having a table, a distance meter that measures the distance to the end surface of the measurement target of the glass plate placed on the mounting part, and the distance meter along the first direction that is separated from the end surface of the measurement target and the end surface of the measurement target. A holding mechanism that holds the movable unit in the second direction, a straight edge that extends along the second direction, and a copying mechanism that allows the rangefinder held by the holding mechanism to follow the straight edge, To do.

According to such a configuration, the distance to the end surface of the measurement target of the glass plate is measured by the distance meter. Since the rangefinder can be moved in the second direction along the end surface of the measurement target by the holding mechanism, the distance to the end surface of the measurement target of the glass plate can be measured at a plurality of points in the second direction. At this time, since the distance meter moves along the straight edge by the copying mechanism, the position of the distance meter in the first direction away from the end surface of the measurement target becomes constant with the straight edge as a reference. Therefore, the straightness of the end surface of the glass plate can be easily and reliably measured based on the measurement result of the range finder without using advanced image analysis.

In the above configuration, the distance meter preferably includes a contactor that comes into contact with the end surface of the measurement target, and the contactor is preferably a cylindrical roller.

With this configuration, since the rangefinder is a contact-type rangefinder in which a contact is brought into contact with the end surface of the measurement target, it is possible to measure up to the end surface of the measurement target as compared with a non-contact type (for example, optical type) distance meter. The distance can be easily measured. Further, since the contactor is a rotatable roller, the portion of the contactor that comes into contact with the end surface of the glass plate changes in order with the rotation, and wear of the contactor can be suppressed. Further, since the contactor is cylindrical, the displacement of the most protruding portion of the end face is always measured even if the end face of the glass plate is inclined, and the measurement error of the straightness of the end face of the glass plate is reduced.

In the above configuration, it is preferable to provide a weight that regulates the movement of the glass plate.

By doing this, the position of the glass plate can be prevented from shifting when measuring the straightness.

In this case, it is preferable to provide a supporting member that extends along the straight edge and supports the weight through the glass plate.

By doing this, it is possible to prevent the glass plate from bending downward due to the weight load.

In the above configuration, it is preferable that the holding mechanism is located between the end surface of the measurement target and the straight edge, and the copying mechanism has an elastic body that brings the holding mechanism to the straight edge.

By doing this, the elastic body moves the holding mechanism closer to the straight edge, so that the position of the rangefinder in the first direction is more stable. As a result, the straightness of the end surface of the glass plate can be measured more accurately.

In the above configuration, it is preferable to provide a scale indicating the position of the distance meter in the second direction.

By doing this, the position of the rangefinder in the second direction can be accurately grasped by the scale.

A second invention devised to solve the above-mentioned second problem is a glass plate measuring device for measuring shape data of a rectangular glass plate, and a mounting part on which the glass plate is mounted. A table having, a straightness measuring device for measuring the straightness of the end face of the glass plate placed on the placing part, a dimension measuring device for measuring the dimensions of the glass plate placed on the placing part, And a squareness measuring device for measuring a squareness of an end face intersecting at a corner of a glass plate placed on the section.

With such a configuration, it is possible to measure the shape data of the glass plate including straightness, dimensions, and squareness in a state in which the glass plate is placed on the placing portion of the table. Therefore, the shape data of the glass plate including straightness, dimensions, and squareness can be efficiently measured in a small space.

A third invention devised to solve the above-mentioned third problem is a glass plate measuring device for measuring shape data of a glass plate, and a distance for measuring a distance to an end face of a measurement target of the glass plate. It is characterized in that the range finder has a contactor made of a cylindrical roller that comes into contact with the end surface of the glass plate to be measured.

According to such a configuration, since the rangefinder is a contact-type rangefinder in which a contact is brought into contact with the end face of the measurement target, the end face of the measurement target is compared to a non-contact type (for example, optical type) rangefinder. The distance to can be easily measured. Further, since the contactor is cylindrical, the displacement of the most protruding portion of the end face is always measured even when the end face of the glass plate is inclined, and the measurement error of the distance to the end face of the glass plate is reduced. Further, since the contactor is a rotatable roller, the portion of the contactor that comes into contact with the end surface of the glass plate changes in sequence with the rotation, and wear of the contactor can be suppressed. That is, the measurement accuracy can be maintained for a long period of time without frequently changing the contacts.

According to the first invention, the straightness of the end surface of the glass plate can be measured easily and reliably.

According to the second invention, it is possible to efficiently measure the shape data of the glass plate including straightness, dimensions, and squareness in a small space.

According to the third invention, the shape data of the glass plate can be easily and surely measured and the measurement accuracy can be maintained for a long period of time.

It is a top view which shows the glass plate measuring device which concerns on embodiment of this invention. It is sectional drawing of the 1st convex part in the lateral direction. It is a cross-sectional view in a lateral direction showing a modified example of the first ridge portion. It is a cross-sectional view in a lateral direction showing a modified example of the first ridge portion. It is a cross-sectional view in a lateral direction showing a modified example of the first ridge portion. It is a cross-sectional view in a lateral direction showing a modified example of the first ridge portion. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 and is a cross-sectional view showing an example of a contact state between the straight edge ruler and the roller of the copying mechanism. FIG. 2B is a sectional view taken along line BB of FIG. 1, showing a preparatory step of placing a glass plate on a table using a placing jig. It is a top view of the glass plate measuring device which concerns on embodiment of this invention, Comprising: It is a figure which shows the straightness measuring process which measures the straightness of the end surface of a glass plate. It is a perspective view which shows the state which supported the weight by the support member through the glass plate in the straightness measurement process of FIG. It is sectional drawing which shows an example of the contact state of the contactor of a range finder and the end surface of a glass plate in the straightness measurement process of FIG. It is a top view of the glass plate measuring device which concerns on embodiment of this invention, Comprising: It is a figure which shows the dimension measuring process which measures the dimension of a glass plate. It is a top view of the glass plate measuring device which concerns on embodiment of this invention, Comprising: It is a figure which shows the squareness measuring process which measures the squareness of a glass plate. It is a schematic diagram for demonstrating the method of obtaining a squareness from the measured value of a range finder in the squareness measurement process of FIG. It is a top view of the glass plate measuring device which concerns on embodiment of this invention, Comprising: It is a figure which shows the 1st calibration process which calibrates a dimension measuring instrument using a calibration jig. FIG. 13 is a cross-sectional view taken along the line DD in FIG. 12, showing the arrangement of calibration jigs in the calibration process. FIG. 13 is a cross-sectional view taken along the line CC of FIG. 12, showing the positional relationship in the height direction between the support portion of the calibration jig and the glass plate. It is a top view of the glass plate measuring device which concerns on embodiment of this invention, Comprising: It is the schematic which shows the state of the opening stage of the 2nd calibration process which calibrates a distance meter using a calibration jig. It is a top view of the glass plate measuring device which concerns on embodiment of this invention, Comprising: It is the schematic which shows the state of the last stage of the 2nd calibration process which calibrates a range finder using a calibration jig.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, XYZ in the figure is an orthogonal coordinate system. The X and Y directions are horizontal, and the Z direction is vertical.

As shown in FIG. 1, the glass plate measuring device 1 according to the present embodiment is a device for measuring the shape data of a rectangular glass plate G. In this embodiment, the glass plate measuring device 1 uses, as the shape data, the straightness of at least one of the end faces Ga to Gd of the glass plate G, the vertical and horizontal dimensions (X-direction dimension and Y-direction dimension) of the glass sheet G, and the glass. The squareness of the end faces Ga to Gd intersecting at at least one of the corners G1 to G4 of the plate G is measured. That is, the glass plate measuring device 1 includes a straightness measuring device, a dimension measuring device, and a squareness measuring device.

(table)
The glass plate measuring device 1 basically includes a table 2 having a mounting portion 2x on which the glass plate G is mounted. The glass plate G is mounted on the mounting portion 2x of the table 2 such that the end surfaces Ga and Gb are substantially parallel to the X direction and the end surfaces Gc and Gd are substantially parallel to the Y direction.

Here, the thickness of the glass plate G is, for example, 0.2 to 10 mm, and the size of the glass plate G is, for example, 700 mm×700 mm to 3000 mm×3000 mm. The glass plate G is manufactured by a known method such as a down draw method (for example, an overflow down draw method) or a float method. The glass plate G is used, for example, as a substrate of a flat panel display such as a liquid crystal display or a cover glass such as a touch panel.

The mounting portion 2x may be formed of a single plane or a plurality of planes, but in the present embodiment, the first ridge portion 2a and the second ridge portion having a long contact portion that comes into contact with the glass plate G. It has a part 2b.

The contact portion of the first ridge portion 2a extends along the pair of opposed end surfaces Ga and Gb of the glass plate G, that is, along the X direction, and the contact portion of the second ridge portion 2b faces the glass plate G. The pair of end faces Gc, Gd that extend along the Y direction.

By doing so, the contact portion of the first ridge portion 2a becomes elongated along the X direction, and therefore, when the glass plate G is moved along the X direction, the first ridge portion 2a does not contact the glass plate G. On the other hand, it does not become a great resistance. Therefore, it is possible to smoothly move (slide) the glass plate G in the X direction while the glass plate G is supported from below by the first ridge portion 2a. Similarly, since the contact portion of the second ridge portion 2b is elongated along the Y direction, the second ridge portion 2b is larger than the glass plate G when the glass plate G is moved along the Y direction. I can't resist. Therefore, it is possible to smoothly move (slide) the glass plate G in the Y direction while the glass plate G is supported from below by the second ridge portion 2b. Therefore, while the glass plate G is being supported by the first ridges 2a and the second ridges 2b, the glass plate G can be smoothly moved in two different X and Y directions for easy positioning. You can In addition, since the supporting area of the first ridge portion 2a and the second ridge portion 2b can be reduced as compared with the case where the entire surface of the glass plate G is supported by a surface, it is a case of supporting a large-sized glass plate G. However, it is possible to suppress an increase in cost due to an increase in the supporting area of the mounting portion 2x.

The plurality of first ridge portions 2a are provided at a plurality of locations in the Y direction with a spacing in the X direction, and the second ridge portions 2b are provided at a plurality of locations in the X direction with a spacing in the Y direction. There are multiple. That is, the first ridge portions 2a and the second ridge portions 2b are scattered on the table 2 at intervals so that the glass plate G can be supported in a stable posture.

The first ridge portion 2a and the second ridge portion 2b are detachably fixed to the table 2 by fasteners (not shown) such as screws. Therefore, any member of the plurality of ridges 2a and 2b can be individually replaced.

The arrangement of the first ridge portions 2a and the second ridge portions 2b is not particularly limited and may be, for example, a regular arrangement such as a grid pattern or a zigzag pattern. It may be a regular array. Further, the longitudinal direction of the contact portion of the first ridge portion 2a and the longitudinal direction of the contact portion of the second ridge portion 2b are not limited to the X direction and the Y direction, and may be directions different from each other. Further, another ridge portion having a long contact portion may be further provided along a direction different from the ridge portions 2a and 2b (for example, a direction having an angle of 45° with the X direction).

As shown in FIG. 2, the cross-sectional shape of the first ridge portion 2a in the lateral direction (Y direction) is trapezoidal in consideration of the posture stability of the first ridge portion 2a on the table 2. That is, the first ridge portion 2a is wider on the bottom portion 2aa side than on the upper portion 2ab side, and is fixed to the table 2 in a state where the bottom portion 2aa is grounded to the table 2. Here, the upper portion 2ab (contact portion with the glass plate G) of the first ridge portion 2a may be a flat surface or a curved surface. Alternatively, the upper portion 2ab of the ridge portion 2a may be formed in a linear shape by narrowing the width in the lateral direction. In this case, the cross-sectional shape of the first ridge portion 2a in the lateral direction (Y direction) is, for example, a triangle. It can be shaped. In addition, the cross-sectional shape of the first ridge portion 2a in the lateral direction is not particularly limited, and various changes can be made. The first ridge portion 2a can adopt a sectional shape as shown in, for example, FIGS. 3A to 3D. In FIG. 3A, the first ridge portion 2a has a trapezoidal tip portion (on the side of the glass plate G) and a rectangular base portion (on the side of the table 2). In FIG. 3B, the first ridge portion 2a has a semicircular shape whose tip portion forms a convex curved surface. In FIG. 3C, the first ridge portion 2a has a U shape having two ridges arranged in parallel. In FIG. 3D, the first ridge 2a may be brush-shaped, that is, the first ridge 2a may be a brush. The cross-sectional shape of the second ridge portion 2b in the lateral direction (X direction) is not particularly limited, but may be the same as the cross-sectional shape of the first ridge portion 2a in the lateral direction (Y direction). Can be adopted.

The contact portion of the first ridge portion 2a and the contact portion of the second ridge portion 2b are preferably made of resin such as nylon. In this way, the glass plate G becomes slippery on the ridges 2a and 2b. In addition, in the present embodiment, the entire first protrusion 2a and the second protrusion 2b are made of resin.

The longitudinal dimension (X-direction dimension) of the contact portion of the first ridge portion 2a and the longitudinal dimension (Y-direction dimension) of the contact portion of the second ridge portion 2b are, for example, 0.2 to 20 mm. Is preferred. The short-side dimension (Y-direction dimension) of the contact portion of the first ridge portion 2a and the short-side dimension (X-direction dimension) of the contact portion of the second ridge portion 2b are, for example, 5 to 400 mm. Preferably.

As shown in FIG. 1, in this embodiment, the mounting portion 2x further includes a plurality of columnar protrusions 2c. The projection 2c supports the glass plate G from below at its tip. The tip of the protrusion 2c may be provided with a float mechanism for facilitating the positioning of the glass plate G, but in the present embodiment, it is composed of a spherical roller. The protrusions 2c are scattered on the table 2 at intervals. The arrangement mode of the protrusions 2c is not particularly limited, and may be, for example, a regular array such as a grid pattern or a zigzag pattern, or an irregular array. The tip of the protrusion 2c may be a non-rolling body, and may have any shape such as a convex curved surface or a flat surface.

(Straightness measuring device)
As shown in FIG. 1, the glass plate measuring device 1 has a rangefinder 3, a holding mechanism 4, and a straightedge 5 as a configuration for measuring the straightness (straightness) of the end faces Ga to Gd of the glass plate G. And a copying mechanism 6 on the table 2. Here, the straightness means the magnitude of deviation from a geometrically correct straight line of a straight line shape.

The distance meter 3 measures the distance to the end surface Ga of the glass plate G placed on the mounting portion 2x of the table 2, that is, the displacement of the end surface Ga of the glass plate G from the reference position. Here, in the present embodiment, the reference position is set to the positions of both end portions in the X direction of the end surface Ga of the glass plate G. That is, the distance meter 3 is calibrated and the mounting position of the glass plate G is adjusted so that the measured value of the distance meter 3 is zero at both ends of the end surface Ga of the glass plate G in the X direction.

The distance meter 3 is a contact type distance meter (for example, a dial gauge) including a contactor 3a that contacts the end surface Ga of the measurement target, and a spindle 3b that holds the contactor 3a so as to be movable back and forth in the Y direction. In the present embodiment, the contactor 3a is a cylindrical roller that rolls while contacting the end surface Ga of the glass plate G (see FIG. 8 described later). Further, the contactor 3a is biased toward the end surface Ga of the measurement target and can follow the end surface Ga of the measurement target. The contactor 3a is, for example, a rolling element (for example, a spherical roller) having a shape other than a cylindrical shape, or a non-rolling element that slides on the end surface Ga of the glass plate G (for example, a needle-shaped member or a cylindrical member). May be

The holding mechanism 4 holds the rangefinder 3 so as to be movable in the Y direction (direction away from the end surface Ga of the glass plate G) and the X direction (direction along the end surface Ga of the glass plate G).

The holding mechanism 4 includes a first stage 4b movable in the X direction along a rail 4a provided on the table 2 and a first stage 4b movable in the Y direction along a rail 4c provided on the first stage 4b. And two stages 4d. The first stage 4b can be moved in the X direction manually or automatically. The distance meter 3 is attached on the second stage 4d. Although the moving direction of the second stage 4d is parallel to the Y direction, it may have an angle with respect to the Y direction.

The holding mechanism 4 is provided on the table 2 and further includes a scale 4e indicating the position of the distance meter 3 in the X direction. In the present embodiment, predetermined marks indicating the measurement positions of the rangefinder 3 are provided on the scale 4e at equal intervals. The scale 4e may be arranged at any position on the straightedge 5, for example. The scale 4e may be omitted.

The straight edge 5 is provided on the table 2 along the X direction. The straightness of the straightedge 5 is measured and recorded in advance.

The copying mechanism 6 is a mechanism for aligning the distance meter 3 attached to the holding mechanism 4 with the straightedge 5. The copying mechanism 6 includes a pressing member 6a and a spring 6b.

The pressing member 6a has a base end attached to the second stage 4d, and a tip end coming into contact with the straight edge 5.

The spring 6b is provided between the first stage 4b and the second stage 4d so as to draw the second stage 4d toward the straight edge 5 side. Since the pressing member 6a is pressed against the straight edge ruler 5 by the pulling force of the spring 6b, the position of the range finder 3 in the X direction is stabilized. The spring 6b may be provided so as to be pushed toward the straight edge 5 side by pushing the second stage 4d. The spring 6b may be another elastic body such as rubber or may be omitted.

As shown in FIG. 4, the pressing member 6a has a cylindrical roller 6c at its tip. The straight edge ruler 5 includes a concave guide groove 5a that receives the roller 6c. That is, the roller 6c rolls on the straight edge ruler 5 while being received in the guide groove 5a. In the present embodiment, as the straightness of the straightedge 5, the straightness of the guide groove 5a is measured and recorded in advance. The tip of the pressing member 6a is, for example, a rolling element having a shape other than a cylindrical shape (for example, a spherical roller) or a non-rolling element that slides on the straight ruler 5 (for example, a spherical member or a cylindrical member). It may be.

(Dimension measuring device)
As shown in FIG. 1, the glass plate measuring device 1 has a first pin 7, a second pin 8 and a first size measuring instrument as a configuration for measuring the X-direction dimension and the Y-direction dimension of the glass plate G. 9 and the second dimension measuring device 10 are provided on the table 2.

The first pin 7 comes into contact with the end surface Gc of the glass plate G placed on the placing portion 2x of the table 2 substantially parallel to the Y direction. The second pin 8 comes into contact with the end surface Ga of the glass plate G placed on the placing portion 2x of the table 2 substantially parallel to the X direction. That is, the second pin 8 comes into contact with the end face Ga that intersects the end face Gc with which the first pin 7 comes into contact at a substantially right angle.

The first dimension measuring device 9 measures the dimension between the end faces Gc and Gd substantially parallel to the Y direction, that is, the dimension (first dimension) of the glass plate G in the X direction. The second dimension measuring device 10 measures the dimension between the end faces Ga and Gb substantially parallel to the X direction, that is, the Y dimension (second dimension) of the glass plate G.

The first dimension measuring device 9 is a contact type distance meter (for example, a dial gauge) including a contactor 9a that comes into contact with the end surface Gd and a spindle 9b that holds the contactor 9a so that it can move back and forth in the X direction. Similarly, the second dimension measuring device 10 includes a contactor 10a that contacts the end surface Gb, and a spindle 10b that holds the contactor 10a so that it can move back and forth in the Y direction. Is. In this embodiment, the contacts 9a and 10a are cylindrical non-rolling elements. The contacts 9a and 10a may be, for example, non-rolling bodies (for example, spherical members or needle-shaped members) having shapes other than the cylindrical shape, or rolling bodies (for example, cylindrical rollers or spherical rollers).

The first dimension measuring instrument 9 is provided on the first position adjusting mechanism F capable of adjusting the position in the X direction. As a result, the position of the first dimension measuring instrument 9 can be easily changed so that the glass sheets G having different dimensions can be measured. Further, when measuring other shape data other than the dimensions of the glass plate G, the first dimension measuring instrument 9 can be retracted to a position that does not interfere. The first position adjusting mechanism F is not particularly limited as long as it can adjust the position of the first dimension measuring instrument 9 in the X direction, but in the present embodiment, the first rail Fa provided on the table 2 and the first rail Fa. , A first slider Fb movable in the X direction along the first rail Fa. The first slider Fb can be moved in the X direction manually or automatically. A first dimension measuring meter 9 is attached on the first slider Fb.

The second dimension measuring device 10 is provided on the second position adjusting mechanism S whose position in the Y direction can be adjusted. Thereby, the position of the second dimension measuring instrument 10 can be easily changed so that the glass plates G having different dimensions can be measured. Further, when measuring shape data other than the dimensions of the glass plate G, the second dimension measuring instrument 10 can be retracted to a position where it does not interfere. The second position adjusting mechanism S is not particularly limited as long as it can adjust the position of the second dimension measuring instrument 10 in the Y direction, but in the present embodiment, the second rail Sa provided on the table 2 and the second rail Sa are provided. , And a second slider Sb movable in the Y direction along the second rail Sa. The second slider Sb can be manually or automatically moved in the Y direction. The second dimension measuring instrument 10 is attached on the second slider Sb.

Two sets of the first pin 7 and the first dimension measuring instrument 9 are provided, and two sets of the second pin 8 and the second dimension measuring instrument 10 are provided. That is, the X-direction dimension and the Y-direction dimension of the glass plate G are measured at two locations. The X-direction dimension and the Y-direction dimension may be average values at two points.

The pair of the first pin 7 and the contactor 9a of the first dimension measuring device 9 face each other in the X direction. That is, the first pin 7 and the contactor 9a of the first dimension measuring instrument 9 forming the set have substantially the same Y-direction position. Similarly, the second pin 8 and the contactor 10a of the second dimension measuring instrument 10 forming a pair are directly opposed in the Y direction. That is, the second pin 8 and the contact 10a of the second dimension measuring instrument 10 forming the set have substantially the same X-direction position.

The first pin 7 and the second pin 8 are detachably held on the table 2. In this embodiment, engagement holes (not shown) for holding the pins 7 and 8 are provided on the table 2. The engagement holes are preferably provided at a plurality of positions on the table 2 so that the mounting positions of the pins 7 and 8 can be adjusted when the size of the glass plate G is changed.

In addition, one of the first pin 7 and the first dimension measuring meter 9 forming the set, and the second pin 8 and the second dimension measuring meter 10 forming the pair is omitted, and either the first dimension or the second dimension is omitted. The configuration may be such that only one of them is measured. From the viewpoint of efficiently measuring the longitudinal dimension and the lateral dimension of the glass plate G, both the first pin 7 and the first dimension measuring instrument 9 forming a set, and the second pin 8 and the second dimension measuring instrument 10 forming the pair are both included. Is preferably provided.

(Squarity measuring device)
As shown in FIG. 1, the glass plate measuring device 1 has a first pin 11, a second pin 12, a range finder 13, and a distance meter 13 as a configuration for measuring the squareness of the end surfaces Ga to Gd of the glass plate G. Is provided on the table 2. Reference numeral 14 in the figure is a calibration rangefinder for calibrating the rangefinder 13.

The first pin 11 is configured to come into contact with an end surface Gc (first end surface) of the glass plate G placed on the placing portion 2x of the table 2 substantially parallel to the Y direction. The second pin 12 comes into contact with an end surface Gb (second end surface) of the glass plate G mounted on the mounting portion 2x of the table 2 substantially parallel to the X direction. That is, the first pin 11 and the second pin 12 are respectively in contact with the end faces Gc, Gb intersecting at the corner G1 which is the target of measuring the squareness.

The first pin 11 is composed of a pair of pins provided at intervals in the Y direction, and the second pin 12 is composed of a single pin provided only in the X direction. The end surface Gc is held in parallel with the straight line connecting the pair of first pins 11 by coming into contact with the pair of first pins 11. That is, the end surface Gc is held with a predetermined inclination set in advance. The second pin 12 contacts the end surface Gb while maintaining such inclination of the end surface Gc. Thereby, the glass plate G is positioned by the total of three points of the pair of first pin 11 and second pin 12.

The first pin 11 and the second pin 12 are detachably held on the table 2. In this embodiment, engagement holes (not shown) for holding the pins 11 and 12 are provided on the table 2. The engagement holes are preferably provided at a plurality of positions on the table 2 so that the mounting positions of the pins 11 and 12 can be adjusted when the size of the glass plate G is changed. ‥

The range finder 13 has a reference position (indicated by a one-dot chain line in FIG. 11) where the end surface Gb is located when the end surface Gc and the end surface Gb of the glass plate G positioned by the first pin 11 and the second pin 12 are at right angles. The displacement of the actual position of the end surface Gb (refer to the position) (deviation in the Y direction from the reference position) is measured.

The distance meter 13 is a contact type distance meter (for example, a dial gauge) including a contactor 13a that contacts the end surface Gb and a spindle 13b that holds the contactor 13a so as to be movable back and forth in the Y direction. In the present embodiment, the contact 13a is a cylindrical non-rolling body. The contactor 13a may be, for example, a non-rolling element (for example, a spherical member or a needle-shaped member) having a shape other than a cylindrical shape, or a rolling element (for example, a cylindrical roller or a spherical roller).

The distance meter 13 contacts the end surface Gb at a position different from the position where the second pin 12 contacts the end surface Gb. In the present embodiment, the distance meter 13 contacts the end surface Gb between the position where the second pin 12 contacts the end surface Gb and the position where the end surface Gb intersects the end surface Gc.

Similarly to the distance meter 13, the calibration distance meter 14 also includes a contact type distance meter including a contactor 14a that contacts the end surface Gb and a spindle 14b that holds the contactor 14a so as to be movable back and forth in the Y direction (for example, Dial gauge).

The calibration distance meter 14 contacts the end surface Gb at a position different from the position where the second pin 12 and the distance meter 13 contact the end surface Gb. In the present embodiment, the calibration distance meter 14 contacts the end surface Gb between the position where the second pin 12 contacts the end surface Gb and the position where the distance meter 13 contacts the end surface Gb. ..

The distance meters 13 and 14 are held by a holding mechanism (for example, a slide mechanism) so as to be movable in the Y direction. Thereby, when measuring shape data other than the squareness of the glass plate G, the rangefinders 13 and 14 can be retracted to a position where they do not interfere. Further, when the size of the glass plate G is changed, the positions of the distance meters 13 and 14 can be easily adjusted.

(Mounting jig)
As shown in FIG. 1, the glass plate measuring apparatus 1 includes a mounting jig 15 that supports the glass plate G from below as a configuration for mounting the glass plate G on the mounting portion 2x of the table 2. There is. The mounting jig 15 is a ladder-shaped member having an opening 15a through which the ridges 2a and 2b and the protrusion 2c of the table 2 can be inserted. The mounting jig 15 is mounted on the table 2 after the glass plate G is transferred from the mounting jig 15 to the ridges 2a and 2b and the protrusion 2c. The ridges 2a and 2b and/or the protrusion 2c may be provided outside the opening 15a in addition to inside the opening 15a as long as they do not interfere with the mounting jig 15. The mounting jig 15 may be, for example, a lattice-shaped member, and may have any shape having an opening through which the protrusions 2a and 2b and the protrusion 2c can be inserted.

Next, a glass plate measuring method using the glass plate measuring device 1 configured as described above will be described.

The glass plate measuring method according to the present embodiment includes a preparatory step of mounting the glass plate G on the mounting portion 2x of the table 2, a straightness measuring step of measuring straightness of an end surface of the glass plate G, and a glass plate G. A dimension measurement step of measuring the vertical and horizontal dimensions of the and the squareness measurement step of measuring the squareness of the end surface of the glass sheet G are provided in this order. The order of these steps after the preparation step may be interchanged, for example, the dimension measuring step, the straightness measuring step, and the squareness measuring step may be performed in this order.

(Preparation process)
As shown in FIG. 5, in the preparation step, first, the glass plate G is placed on the placing jig 15 and carried to a position above the table 2 (a state indicated by a chain line in the figure). Next, the mounting jig 15 is lowered from this state, and the projections 2a and 2b and the protrusion (spherical roller) 2c of the mounting portion 2x of the table 2 are inserted into the opening 15a of the mounting jig 15. Let In this process, the glass plate G mounted on the mounting jig 15 is pushed up by the ridges 2a and 2b and the protrusion 2c, and the glass plate G is moved from the mounting jig 15 to the ridges 2a and 2b and the protrusions. It is transferred to the section 2c. The mounting jig 15 is lower than the ridges 2a and 2b and the protrusion 2c in a state of being mounted on the table 2. Therefore, after the glass plate G is transferred from the mounting jig 15 to the ridges 2a and 2b and the protrusion 2c, the mounting jig 15 can be mounted on the table 2 and accommodated.

(Straightness measurement process)
As shown in FIG. 6, in the straightness measuring step, first, the glass plate G supported by the mounting portion 2x is positioned. In the present embodiment, the glass plate G is positioned so that one end in the X direction and the other end in the X direction of the end surface Ga of the glass plate G are located at predetermined reference positions. Specifically, at the first position P1 and the second position P2 for measuring both ends of the end surface Ga in the X direction, the glass plate G is placed so that the displacement from the reference position measured by the distance meter 3 becomes zero. Position. In such positioning work of the glass plate G, when the rangefinder 3 is moved between the first position P1 and the second position P2, in order to prevent wear of the contactor 3a of the rangefinder 3, It is preferable that 3a is retracted from the end surface Ga of the glass plate G. Next, with the glass plate G positioned, the weight 16 is placed on the glass plate G so that the glass plate G does not move. After that, while checking the position with the scale 4e, the distance measuring device 3 is moved by a predetermined distance in the X direction by the holding mechanism 4, and the straightness of the end surface Ga of the glass plate G is measured. The weight 16 is removed from the glass plate G when the straightness measuring step is completed.

As shown in FIG. 7, in the present embodiment, the weight 16 placed on the glass plate G is arranged near the end surface Ga of the glass plate G and along the end surface Ga (that is, the straight edge 5). A support member 17 that extends along the end surface Ga (that is, the straight edge 5) and supports the weight 16 through the glass plate G is arranged on the table 2 near the end surface Ga of the glass plate G. As a result, the vicinity of the end surface Ga of the glass plate G whose straightness is measured is prevented from being bent downward by the load of the weight 16.

In the straightness measuring step, it is preferable to remove the pins 7, 8, 11 and 12 from the table 2 and retract the dimension measuring instruments 9 and 10 and the distance measuring instruments 13 and 14 to positions that do not interfere. Examples of the retracting method of the dimension measuring instruments 9 and 10 and the distance measuring devices 13 and 14 include a method of retracting the entire dimension measuring instruments 9 and 10 and the distance measuring devices 13 and 14 to the retracted position, and contactors 9a and 10a. , 13a, 14a are retracted to the retracted position (state of FIG. 6).

As shown in FIG. 8, the contactor 3a of the distance meter 3 is a cylindrical roller and rolls while contacting the end surface Ga of the glass plate G. With this configuration, as the contactor 3a rotates, the portion of the contactor 3a that contacts the end surface Ga of the glass plate G sequentially changes, so that wear of the contactor 3a can be suppressed. Further, since the contactor 3a is cylindrical, even if the end surface Ga of the glass plate G is inclined, the displacement of the most protruding portion of the end surface Ga is always measured. Therefore, the measurement error of the straightness by the distance meter 3 becomes small. The rotation axis of the contactor 3a is substantially parallel to the thickness direction (Z direction) of the glass plate G.

As shown in FIG. 6, since the position of the rangefinder 3 in the Y direction is determined with the straightedge 5 as a reference, the displacement (straightness) of the end surface Ga of the glass plate G measured by the rangefinder 3 is a straight line. It is affected by the straightness of ruler 5. Therefore, the difference (S1-S2) between the measured straightness S1 of the end surface Ga of the glass plate G and the straightness S2 of the known straightedge 5 is recorded as the final straightness of the end surface Ga of the glass plate G. To be done.

After the straightness of the end surface Ga of the glass plate G is measured, it is preferable to measure the end surface Ga of the glass plate G again with the range finder 3 at the positions P1 and P2 to check whether the glass plate G is displaced. That is, if the displacement from the reference position measured by the distance meter 3 at both positions P1 and P2 is zero, it can be confirmed that the glass plate G is not displaced before and after the measurement.

Although the case where the straightness of the end surface Ga of the glass plate G is measured has been illustrated above, it is preferable to measure the straightness of each of the four end surfaces Ga to Gd of the glass plate G. In this case, after measuring the straightness of the end surface Ga of the glass plate G, the orientation of the glass plate G with respect to the table 2 is changed by the mounting jig 15 or other means, and the straightness of the remaining end surfaces Gb to Gd is adjusted. Perform the same procedure. If the straightness of each of the four end faces Ga to Gd of the glass plate G is measured, for example, in the end face processing step included in the manufacturing process of the glass plate G, based on the straightness of each end face Ga to Gd of the glass plate G, The position of the processing tool can be adjusted accurately. Therefore, it becomes easy to process each of the end surfaces Ga to Gd of the glass plate G with a constant grinding amount. The method of adjusting the position of the working tool based on such straightness can also be applied to the case of performing constant pressure grinding.

(Dimension measurement process)
As shown in FIG. 9, in the dimension measuring step, first, the first pin 7 and the second pin 8 are brought into contact with the end surfaces Ga and Gc of the glass plate G to position the glass plate G supported by the mounting portion 2x. .. In this state, the contactors 9a, 10a of the dimension measuring instruments 9, 10 are brought into contact with the end faces Gb, Gd of the glass plate G, and the X-direction dimension and the Y-direction dimension of the glass plate G are measured. Since the contactors 9a and 10a of the dimension measuring instruments 9 and 10 are cylindrical, the positions of the most protruding portions of the end faces Gb and Gd of the glass plate G are measured, like the contactor 3a of the distance meter 3.

The X-direction dimension and the Y-direction dimension of the glass plate G may be measured at the same time or separately. In the case of separately measuring, for example, the first pin 7 is brought into contact with the end surface Gc of the glass plate G, the dimension of the glass plate G in the X direction is measured by the first dimension measuring instrument 9, and then the first pin 7 is measured. The contact between the first dimension measuring instrument 9 and the glass sheet G is released, the second pin 8 is brought into contact with the end surface Ga of the glass sheet G, and the dimension of the glass sheet G in the Y direction is measured by the second dimension measuring instrument 10. To measure.

In the present embodiment, each of the X-direction dimension and the Y-direction dimension is measured at two points, but the number of pairs of pins and the dimension measuring device that faces them can be appropriately changed. That is, each of the X-direction dimension and the Y-direction dimension may be measured at only one place, or may be measured at three or more places.

In the dimension measurement process, it is preferable to retract the distance meters 3, 13, 14 to a position that does not interfere with them. Examples of the method of retracting the rangefinders 3, 13, 14 include a method of retracting the entire rangefinders 3, 13, 14 to the retracted position, or a method of retracting only the contacts 3a, 13a, 14a to the retracted position. (State of FIG. 9) and the like.

(Squareness measurement process)
As shown in FIG. 10, in the perpendicularity measuring step, first, the first pin 11 and the second pin 12 are brought into contact with the end faces Gb and Gc of the glass plate G to position the glass plate G supported by the mounting portion 2x. To do. In this state, the contact 13a of the distance meter 13 is brought into contact with the end surface Gb of the glass plate G, and the displacement (displacement in the Y direction) from the reference position of the end surface Gb is measured. Since the contactor 13a of the distance meter 13 has a cylindrical shape, the position of the most protruding portion of the end surface Ga of the glass plate G is measured, like the contactor 3a of the distance meter 3.

The displacement measured by the distance meter 13 is converted into the inclination of the end surface Gb with respect to the vertical surface of the end surface Gc, and this inclination indicates the squareness. As shown in FIG. 11, the inclination (squareness) of the end surface Gb with respect to the vertical surface of the end surface Gc is, for example, Y from a position where the end surface Gc and the end surface Gb intersect to a position where the end surface Gb and the end surface Gb intersect. It is represented by a displacement M (=d1×d3/d2) in the direction or an angle θ (=tan ⁻¹ (d1/d2)) formed by the vertical surface of the end surface Gc and the end surface Gb. Here, d1 is the displacement in the Y direction measured by the distance meter 13, d2 is the distance in the X direction between the known distance meter 13 and the second pin 12, and d3 is the known X direction dimension of the glass plate G. (Design value). The inclination of the end surface Gb with respect to the vertical surface of the end surface Gc may be automatically calculated by a calculation device from the displacement measured by the distance meter 13, or may be converted into an inclination by the displacement measured by the distance meter 13. The table may be created in advance and read from the conversion table.

By measuring the squareness in this way and controlling the squareness of the glass sheet G to be manufactured, for example, alignment of the glass sheet G in various processes (including the process of the delivery destination) such as processing, cleaning and inspection ( It is possible to prevent the deviation of (positioning).

In the above, the case of measuring the perpendicularity of the end faces intersecting at the corner G1 of the glass plate G has been illustrated, but the squareness of the end faces intersecting at each of the four corners G1 to G4 of the glass plate G should be measured. You can In this case, after measuring the squareness of the end faces intersecting at the corner G1 of the glass plate G, the orientation of the glass plate G with respect to the table 2 is changed by the mounting jig 15 or other means, and the remaining corners G2. The perpendicularity of the end faces intersecting at G4 is measured by the same procedure.

In addition, in the perpendicularity measuring step, it is preferable to remove the pins 7 and 8 from the table 2 and retract the distance meters 3 and 14 and the dimension measuring meters 9 and 10 to positions that do not interfere. Examples of the retracting method of the distance meters 3, 14 and the dimension measuring instruments 9, 10 include, for example, a method of retracting the entire distance measuring instruments 3, 14 and the dimension measuring instruments 9, 10 to the retracted position, and the contactors 3a, 9a. , 10a, 14a are retracted to the retracted position (state of FIG. 10).

(Calibration process)
The glass plate measuring method according to the present embodiment calibrates the first calibrating step for calibrating the dimension measuring instruments 9 and 10 used in the dimension measuring step and the range finder 13 used for squareness measurement before the preparing step. And a second calibration step. These calibration steps may be performed every time the glass plate G is measured, or may be performed after the glass plate G is measured a predetermined number of times or a predetermined time. Moreover, you may implement when the size of the glass plate G of a measuring object changes. Of course, only the first calibration step may be performed, or only the second calibration step may be performed.

As shown in FIGS. 12 and 13, in the first calibration step, the rod-shaped first calibration jig 18 is used to calibrate the first dimension measuring instrument 9, and the rod-shaped second calibration jig 19 is used to perform the second calibration. Calibrate the dimension measuring instrument 10. FIG. 12 shows a state in which the first dimension measuring instrument 9 is calibrated by using the first calibration jig 18 by a solid line, and a state in which the second dimension measuring instrument 10 is calibrated by using the second calibration jig 19 is indicated by a chain line. Shows. The calibration of the first dimension measuring instrument 9 and the calibration of the second dimension measuring instrument 10 are performed separately.

The lengths of the first calibration jig 18 and the second calibration jig 19 are known. In the present embodiment, the length of the first calibration jig 18 is set to the reference dimension (design dimension) of the X-direction dimension of the glass plate G, and the length of the second calibration jig 19 is the glass plate G. Is set to the reference dimension (design dimension) of the Y-direction dimension. The calibration jigs 18 and 19 themselves are preferably calibrated regularly (for example, about once a year).

During calibration of the first dimension measuring instrument 9, one end of the first calibration jig 18 is brought into contact with the first pin 7, and the other end of the first calibration jig 18 is brought into contact with the contact 9a of the first dimension measuring instrument 9. Let During calibration of the second dimension measuring instrument 10, one end of the second calibration jig 19 is brought into contact with the second pin 8 and the other end of the second calibration jig 19 is brought into contact with the contact 10a of the second dimension measuring instrument 10. Let

The reference position (for example, the zero point) of the first dimension measuring device 9 is calibrated to a position where the contact 9a contacts the first calibration jig 18, and the reference position (for example, the zero point) of the second dimension measuring device 10 is the contact member. 10a is calibrated at a position where it contacts the second calibration jig 19.

In the present embodiment, the first dimension measuring instrument 9 measures the displacement of the end surface Gd of the glass plate G from the reference position, and the second dimension measuring instrument 10 measures the displacement of the end surface Gb of the glass sheet G from the reference position. taking measurement. That is, the sum of the reference dimension in each direction and the measured displacement (negative displacement when shorter than the reference dimension, positive displacement when longer than the reference dimension) is the dimension of the glass plate G in the X direction and the Y direction. Recorded as dimensions. Therefore, if the reference positions of the dimension measuring instruments 9 and 10 are calibrated as described above, the measurement accuracy of the X-direction dimension and the Y-direction dimension is improved.

The first calibration jig 18 includes a small diameter portion 18a and a large diameter portion 18b having a diameter larger than that of the small diameter portion 18a. Similarly, the second calibration jig 19 includes a small diameter portion 19a and a large diameter portion 19b having a diameter larger than that of the small diameter portion 19a. The material of the small diameter portions 18a, 19a and the large diameter portions 18b, 19b is not particularly limited, but in the present embodiment, the small diameter portions 18a, 19a are made of metal, and the large diameter portions 18b, 19b are made of rubber. Is formed by.

On the table 2, a first support portion 20 that supports the large diameter portion 18b of the first calibration jig 18 and a second support portion 21 that supports the large diameter portion 19b of the second calibration jig 19 are provided. There is. Semi-cylindrical concave grooves are formed on the upper surfaces of the supporting portions 20 and 21 to support the cylindrical large diameter portions 18b and 19b. By supporting the large diameter portions 18b and 19b of the calibration jigs 18 and 19 with the support portions 20 and 21, the heights of the calibration jigs 18 and 19 are automatically adjusted. Therefore, the calibration work of the dimension measuring instruments 9 and 10 becomes easy.

The first supporting portion 20 and the second supporting portion 21 are lower than the placing portion 2x of the table 2, that is, the protruding portions 2a and 2b and the protruding portion 2c. As a result, as shown in FIG. 14, the supporting portions 20 and 21 do not come into contact with the glass plate G placed on the placing portion 2x when the calibration work is not performed.

As shown in FIG. 15 and FIG. 16, in the second calibration step, the calibration having the first proof surface 22a and the second proof surface 22b which can be in contact with the first pin 11 and the second pin 12 and which are perpendicular to each other. Jig 22 (for example, a squarer), and a calibration rangefinder 14 that measures the displacement of the position of the second assurance surface 22b from the reference position with the first assurance surface 22a in contact with the first pin 11. Is used to calibrate the range finder 13. It is preferable that the calibration jig 22 itself is also calibrated regularly (for example, about once a year).

Accurately installing the calibration jig 22 when calibrating the range finder 13 is very difficult and requires skill to perform the work. Therefore, with the first assurance surface 22a of the calibration jig 22 being in contact with the pair of first pins 11, the distance meter 13 and the calibration distance meter 14 of the second assurance surface 22b of the calibration jig 22 are The calibration jig 22 is moved to the second pin 12 side (Y direction) while confirming that the numerical values match. With this configuration, the second assurance surface 22b of the calibration jig 22 can be brought into contact with the second pin 12 while the calibration jig 22 is maintained in the correct posture. As a result, the calibration jig 22 can be installed easily and accurately. The distance meter 13 can be correctly calibrated by measuring the position of the second assurance surface 22b of the calibration jig 22 thus installed with the distance meter 13 and correcting the reference position (zero point).

Note that it is preferable to evacuate the calibration rangefinder 14 to a position where it does not come into contact with the end surface Gb of the glass plate G after the second calibration process is completed. With this configuration, when the distance meter 13 measures the end surface Gb of the glass plate G, the calibration distance meter 14 does not interfere with the measurement of the distance meter 13. At this time, the calibration rangefinder 14 may be detached from the table 2 and retracted, instead of being retracted by the method described above.

Here, the glass plate measuring method according to the present embodiment is carried out, for example, in the glass plate manufacturing process. The glass plate manufacturing process includes a forming process for forming a glass plate, a cutting process for cutting the formed glass plate into a predetermined size, and an end face processing process for performing a finishing process such as chamfering on the cut end face of the glass plate. Including and The glass plate measuring method is performed, for example, after the cutting step and/or the end surface processing step. In this case, as a measurement sample of the glass plate measuring method, one or more glass plates are extracted from the glass plates in the process of production. The drawn glass plate (measurement sample) is discarded after the shape data is measured and reused as, for example, cullet.

As described above, according to the glass plate measuring apparatus 1 of the present embodiment, the shape data including the straightness of the end face, the vertical and horizontal dimensions, and the squareness of the end face of the glass plate G can be obtained without using advanced image processing or the like. Easy and reliable measurement. Further, since all of these shape data of the glass plate G can be measured on the mounting portion 2x, space saving can be achieved. Furthermore, since the glass plate G is supported by the ridges 2a and 2b and the protrusion 2c, even if the glass plate G has a large size, its positioning can be realized easily and at low cost.

It should be noted that the present invention is not limited to the above-described embodiments, and can be carried out in various forms without departing from the scope of the present invention.

In the above embodiment, the mounting portion 2x of the table 2 has been described as including the protruding portions 2a and 2b and the protruding portion 2c formed of a spherical roller. However, the mounting portion 2x is particularly configured. The present invention is not limited to this, and may have a configuration including only one of the protrusions 2a and 2b and the protrusion 2c.

In the above embodiment, the case where the straightness of the end face of the glass plate G is intermittently measured at a plurality of positions on the end face has been described, but the straightness may be continuously measured at the end face. Similarly, although the case where the dimension of the glass plate G is measured at two points on one end face has been described, the dimension of the glass plate G may be measured at one point on the end face, or at three or more points or along the end face. It may be measured continuously.

In the above embodiment, the case where the straightness, the dimension and the squareness are measured as the shape data of the glass plate G has been described, but the shape data is not limited to this. For example, the shape data may include only straightness, or may include dimensions or squareness in addition to straightness. Further, other data such as the thickness and warpage of the glass plate G may be included.

In the above embodiment, the rangefinders 3, 13, 14 and the dimension measuring instruments 9, 10 may be non-contact type rangefinders such as an optical type (for example, a laser rangefinder).

DESCRIPTION OF SYMBOLS 1 Glass plate measuring device 2 Table 2x Mounting part 2a First ridge part 2b Second ridge part 2c Protrusion part (spherical roller)
3 Distance meter (for straightness measurement)
4 Holding mechanism 5 Straightedge 6 Copying mechanism 7 First pin (for dimension measurement)
8 Second pin (for dimension measurement)
9 First dimension measuring instrument 10 Second dimension measuring instrument 11 First pin (for squareness measurement)
12 Second pin (for squareness measurement)
13 Distance meter (for squareness measurement)
14 Calibration distance meter 15 Mounting jig 16 Weight 17 Support member 18 First calibration jig (for dimension measurement)
19 Second calibration jig (for dimension measurement)
20 1st support part 21 2nd support part 22 Calibration jig (for squareness measurement)
G glass plate Ga to Gd end faces G1 to G4 corner F first position adjusting mechanism S second position adjusting mechanism

Claims (8)

1. A glass plate measuring device for measuring the straightness of an end face of a rectangular glass plate,
   A table having a mounting portion on which the glass plate is mounted,
   A distance meter that measures the distance to the end surface of the measurement target of the glass plate placed on the placing unit,
   A holding mechanism that holds the rangefinder movably in a second direction along the first direction and the end surface of the measurement target, which is separated from the end surface of the measurement target,
   A straightedge extending along the second direction,
   A glass plate measuring device, comprising: a copying mechanism that allows the rangefinder held by the holding mechanism to follow the straight edge ruler.
2. The rangefinder includes a contactor that comes into contact with the end surface of the measurement target,
   The glass plate measuring device according to claim 1, wherein the contactor is a cylindrical roller.
3. The glass plate measuring device according to claim 1 or 2, further comprising a weight for restricting movement of the glass plate.
4. The glass plate measuring device according to claim 3, further comprising a support member that extends along the straight edge and supports the weight through the glass plate.
5. The holding mechanism is located between the end surface of the measurement target and the straight edge,
   The glass plate measuring device according to any one of claims 1 to 4, wherein the copying mechanism includes an elastic body that moves the holding mechanism toward the straight edge.
6. The glass plate measuring device according to any one of claims 1 to 5, further comprising a scale indicating a position of the distance meter in the second direction.
7. A glass plate measuring device for measuring shape data of a rectangular glass plate,
   A table having a mounting portion on which the glass plate is mounted,
   A straightness measuring device for measuring the straightness of the end face of the glass plate placed on the placing part,
   A dimension measuring device for measuring the dimensions of the glass plate placed on the placing part,
   A squareness measuring device for measuring a squareness of an end face intersecting at a corner portion of the glass plate placed on the placing part, and a glass plate measuring device.
8. A glass plate measuring device for measuring shape data of a glass plate,
   A rangefinder that measures the distance to the end surface of the measurement target of the glass plate is provided.
   The glass plate measuring device, wherein the range finder has a contact made of a cylindrical roller that comes into contact with the end surface of the measurement target.
   

Images