JP6575925B2 - Glass plate tray - Google Patents

Description

  The present invention relates to a technique for improving a glass plate tray used, for example, for conveying or storing a glass plate.

  For example, a glass plate used for a cover glass of a solid-state imaging device such as a CCD is accommodated in a tray, and is conveyed and stored. The tray used for this purpose can usually accommodate a plurality of glass plates in a flat state. (For example, see Patent Documents 1 to 3).

JP 2006-69651 A JP 2010-47319 A JP 2012-166825 A

  By the way, when the glass plate accommodated in such a tray is taken out from the tray, it is usually picked up automatically by a pickup device. At the time of this pickup, first, the pickup device takes an image of the glass plate and its surroundings with an imaging means. Next, the pickup device recognizes the position of the glass plate based on the difference between the glass plate and the periphery in the image data formed by the imaging means. Then, the pickup device picks up the glass plate based on the recognized position of the glass plate.

  However, due to the fact that the difference between the glass plate and its periphery is not clear in the image data, an error in position recognition of the glass plate may occur in the pickup device during pickup.

  In view of the above circumstances, an object of the present invention is to reduce errors in position recognition of a glass plate in a pickup device.

  The glass plate tray according to the present invention, created to solve the above-mentioned problems, is a glass plate tray provided with a storage region capable of storing a plurality of glass plates in a flat state, and at least a part of the storage region. Further, the present invention is characterized in that a surface capable of recognizing a difference between the glass plate and its periphery is provided by image data.

  In this configuration, since a surface that can recognize the difference between the glass plate and its periphery is provided by the image data, the glass plate and its periphery in the image data can be easily distinguished. Moreover, since the surface which can recognize the difference between a glass plate and its periphery by image data is provided in the accommodation area | region which accommodates a glass plate, it can arrange | position around a glass plate. Therefore, the difference between the glass plate and its periphery can be clarified in the image data. Therefore, it is possible to easily recognize the position of the glass plate with the pickup device. That is, according to the present invention, it is possible to reduce errors in the position recognition of the glass plate in the pickup device. In addition, the surface which can recognize the difference between a glass plate and its periphery by image data can be formed by roughening at least a part of the accommodation area, providing a groove, or coloring.

  Said structure WHEREIN: The rough surface whose surface roughness is rougher than the said glass plate is provided in at least one part of the said accommodation area | region, It is characterized by the above-mentioned.

  In this configuration, since the surface roughness of the rough surface is rougher than the surface roughness of the glass plate, the rough surface and the glass plate in the image data can be easily distinguished. Moreover, since the rough surface is provided in the accommodation area | region which accommodates a glass plate, it can arrange | position around a glass plate. Therefore, the difference between the glass plate and its periphery can be clarified in the image data. Therefore, it is possible to easily recognize the position of the glass plate with the pickup device. That is, according to the present invention, it is possible to reduce errors in the position recognition of the glass plate in the pickup device.

  Said structure WHEREIN: The said storage area is divided into the arrangement | positioning area | region which can arrange | position the said glass plate, and the non-arrangement area | regions other than the said arrangement | positioning area | region, At least one part of the area | region adjacent to the said arrangement | positioning area | region among the said non-arrangement area | regions It is preferable that the rough surface is provided. Here, the arrangement region is the maximum region where the glass plate can be arranged, and the glass plate may be smaller than the arrangement region in plan view due to dimensional tolerances or the like (hereinafter the same).

  If it is this structure, since the rough surface is provided in the non-arrangement area | region adjacent to an arrangement | positioning area | region, the glass plate arrange | positioned at an arrangement | positioning area | region and a rough surface are substantially adjacent in planar view. Therefore, the boundary between the glass plate and the rough surface becomes clear in the image data. Therefore, the position of the glass plate can be recognized more easily by the pickup device, and errors in the position recognition of the glass plate in the pickup device can be further reduced.

  Said structure WHEREIN: It is preferable that the said arrangement | positioning area | region is rectangular shape and the said rough surface is provided in the said non-arrangement area | region adjacent to at least one part in each edge | side of the said arrangement | positioning area | region.

  With this configuration, each side of the rectangular glass plate arranged in the arrangement area is adjacent to the rough surface in plan view, so the boundary between the four sides of the glass plate and the rough surface is clear in the image data. It becomes. Therefore, the pickup device can recognize the positions of all the sides of the rectangular glass plate, thereby improving the accuracy of the position recognition of the glass plate and enabling a pickup with higher accuracy.

  Said structure WHEREIN: It is preferable that the said rough surface is provided only in the frame-shaped area | region containing the said non-arrangement area | region adjacent to at least one part in each edge | side of the said arrangement | positioning area | region.

  With this configuration, since the rough surface that can be a dust generation source is provided only in the frame-shaped region, the rough surface can be reduced in area. Therefore, it is possible to avoid a situation where dust is generated on a rough surface during use of the glass plate tray.

  Said structure WHEREIN: It is preferable that the said rough surface is provided ranging from the said non-arrangement area | region to the said arrangement | positioning area | region.

  With this configuration, the glass plate and the rough surface in a plan view even when the glass plate is smaller than the arrangement region due to the dimensional tolerance of the tray or the glass plate, or even when the glass plate is arranged unevenly within the arrangement region. Can be adjacent to each other. Therefore, the position of the glass plate can be more reliably recognized by the pickup device, and errors in the position recognition of the glass plate can be more reliably reduced.

  As described above, according to the present invention, errors in the position recognition of the glass plate in the pickup device can be reduced.

It is a top view which shows the glass plate tray which concerns on embodiment of this invention. It is a side view which shows the glass plate tray which concerns on embodiment of this invention. It is a bottom view which shows the glass plate tray which concerns on embodiment of this invention. It is an enlarged plan view which shows the principal part of a glass plate tray. FIG. 5 is a cross-sectional view taken along line X-X in FIG. 4. It is an expanded sectional view which shows typically the principal part of the laminated glass plate tray.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing a glass plate tray according to the embodiment of the present invention, and FIG. 2 is a side view showing the glass plate tray according to the embodiment of the present invention.

  The glass plate tray 1 can be stacked in the vertical direction, and is made of a resin such as polycarbonate or ABS resin. The glass plate tray 1 is substantially flat as a whole, and in this embodiment is rectangular in plan view (the lateral side is the long side in FIG. 1), and the direction is identified at one of its four corners. A chamfered portion 1a is formed.

  On the upper surface 1 b of the glass plate tray 1, a ridge 1 c is provided over the entire circumference slightly on the center side from the outer edge. The upper surface main region 1d on the upper surface 1b on the center side of the protruding portion 1c is a flat surface, and is a storage region R that can store a plurality of glass plates 2 in a flat state. In the accommodation region R, a placement portion 3 on which the peripheral edge of each accommodated glass plate 2 is placed, and a positioning portion 4 that positions each glass plate 2 placed on the placement portion 3 in the horizontal direction. Is provided.

  As shown in FIG. 3, the lower surface 1e of the glass plate tray 1 is provided with a raised portion 1f on the outer edge thereof over the entire circumference. The lower surface main region 1g at the center side of the raised portion 1f on the lower surface 1e is planar, and provided with contact portions 5 that contact the glass plates 2 when the glass plate trays 1 are stacked. The raised portion 1f on the lower surface 1e is provided with a plurality of concave portions 1h at predetermined positions for engaging the robot's claws.

  When the glass plate trays 1 are stacked, the inner periphery of the raised portion 1f is fitted to the outer periphery of the protruding portion 1c, and the lower surface of the protruding portion 1f is in contact with the outer edge side region from the protruding portion 1c. The region 1g is configured to come into contact with the upper surface of the ridge portion 1c. Thereby, the stacked glass plate trays 1 are positioned in the vertical direction and the horizontal direction.

  In the present embodiment, the glass plate 2 has a rectangular shape, and the size of the glass plate 2 is 10 mm × 20 mm or more, preferably 20 mm × 30 mm or more, more preferably 30 mm × 40 mm or more. May be the size. The plate thickness of the glass plate 2 is 0.4 mm to 1.0 mm, preferably 0.5 mm to 0.9 mm, more preferably 0.6 mm to 0.8 mm, but is not limited thereto. .

  The surface roughness of the glass plate 2 is, for example, an arithmetic average roughness Ra, preferably 10.0 nm or less, more preferably 5.0 nm or less, and most preferably 2.0 nm or less. The definition of the arithmetic average roughness Ra is based on JIS B 0601: 2013 (the same applies hereinafter). The glass plate 2 having an arithmetic average roughness Ra of 2.0 nm or less can be obtained without performing polishing, for example, if manufactured by the overflow downdraw method.

  In the present embodiment, six glass plates 2 in 3 rows × 2 rows can be arranged in the upper surface main region 1d in a state where the long sides are in the horizontal direction of the rows. Then, the lower surfaces of the four corners of one glass plate 2 are respectively placed on the upper surface of one placement part 3. Thereby, the site | part which is not mounted in the mounting part 3 in the lower surface of the glass plate 2 opposes the upper surface main area | region 1d through a clearance gap. 4 and 5, in the present embodiment, the placement unit 3 has a hemispherical shape, but is not limited thereto, and may have a rectangular parallelepiped shape or the like.

  The positioning portion 4 can come into contact with the four corners of one glass plate 2. More specifically, the side surface of one positioning portion 4 can be brought into contact with each of a pair of end surfaces constituting one corner of the glass plate 2. Thereby, the glass plate 2 is positioned in the horizontal direction by the positioning unit 4.

  4 and 5, in this embodiment, the positioning portion 4 has a substantially rectangular parallelepiped shape, and in a plan view, the dimension L1 in a direction perpendicular to the side on which the glass plate 2 can come into contact. Is larger than the dimension L2 in the direction of the side where the glass plate 2 can come into contact. In the positioning unit 4, the side surface corresponding to the long side in the plan view is planar, but the side surface corresponding to the short side in the plan view is a partial cylindrical surface. The side surface and the upper surface of the positioning part 4 are rounded. In the example of illustration, the positioning part 4 is arrange | positioned so that the long side by planar view may become perpendicular | vertical to the end surface of the glass plate 2, and the side surface of a partial cylindrical surface can contact | abut to the end surface of the glass plate 2. Yes.

  In addition, in this embodiment, the positioning part 4 which can contact | abut to the end surface of a long side by planar view is shared between the glass plates 2 arranged in the vertical direction. That is, one positioning part 4 can contact two glass plates 2 between the glass plates 2 arranged in the vertical direction.

  Further, the abutting portion 5 of the lower surface main region 1g of the lower surface 1e contacts the upper surface of the glass plate 2 accommodated in the lower glass plate tray 1 when the glass plate trays 1 are stacked. The contact part 5 is arrange | positioned in the center position of the direction along each side in the planar view of the glass plate 2, as shown with a dotted line in FIG. 4 and 5, in the present embodiment, the contact portion 5 has a hemispherical shape, but is not limited thereto, and may have a rectangular parallelepiped shape or the like.

  As shown in FIG. 6, when the glass plate tray 1 is stacked under atmospheric pressure, the placing portion 3 comes into contact with the lower surface of the glass plate 2 and the contact portion 5 of the upper glass plate tray 1 serves as the glass plate 2. It abuts on the upper surface. On the other hand, the upper end surface of the positioning portion 4 faces the lower surface main region 1g of the lower surface 1e of the upper glass plate tray 1 through the gap G.

  The size d of the gap G is, for example, 0.02 mm to 0.18 mm, preferably 0.05 mm to 0.15 mm, more preferably 0.08 mm to 0.12 mm, but is not limited thereto. .

  Since the glass plate tray 1 has a certain degree of flexibility, when the glass plate trays 1 are packaged in a stacked state and sealed under reduced pressure, the upper end surface of the positioning portion 4 is positioned on the upper glass plate tray 1. In contact with the lower surface main region 1g of the lower surface 1e.

  As shown in FIG.1 and FIG.4, the storage area | region R is divided into arrangement | positioning area | region Ra in which the glass plate 2 can be arrange | positioned, and non-arrangement area | regions Rb other than arrangement | positioning area | region Ra. As indicated by hatching, a rough surface S having a surface roughness rougher than that of the glass plate 2 is provided in at least a part of the non-arrangement region Rb adjacent to the arrangement region Ra.

  Since the glass plate 2 is rectangular, the arrangement region Ra is also rectangular. The rough surface S is provided in the non-arrangement region Rb adjacent to at least a part of each side of the arrangement region Ra. The rough surface S is provided only in a part of the accommodation region R. In the present embodiment, the rough surface S is provided only in the frame-like region including the non-arrangement region Rb adjacent to a part of each side of the arrangement region Ra. Is provided. The rough surface S is provided from the non-arrangement region Rb to the arrangement region Ra.

  The rough surface S has a short side portion Sa extending along the short side of each glass plate 2 and a long side portion Sb extending along the long side of each glass plate 2, and the short side The ends of the part Sa and the long side part Sb are connected to each other. Specifically, the rough surface S is provided between the pair of positioning portions 4 that can contact each side of the glass plate 2 in the non-arrangement region Rb. Moreover, the rough surface S is provided in the peripheral part except the periphery of the mounting part 3 in arrangement | positioning area | region Ra, and is not provided in the center part. Moreover, between the glass plates 2 arranged in the vertical direction, the long side portion Sb is connected in the entire region in the longitudinal direction. Moreover, short side part Sa is not connected between the glass plates 2 arranged in the horizontal direction.

  The surface roughness of the rough surface S can be defined by, for example, the arithmetic average roughness Ra.

  The surface roughness of the rough surface S is preferably 100 nm to 200 nm in terms of arithmetic average roughness Ra. When the surface roughness of the rough surface S is less than 100 nm in arithmetic mean roughness Ra, the difference between the glass plate 2 and the rough surface S may not be sufficiently obtained in the image data, and the position of the glass plate 2 may not be recognized. There is. When the surface roughness of the rough surface S exceeds 200 nm in terms of arithmetic average roughness Ra, dust may be generated on the rough surface S during use of the glass plate tray 1. In this respect, the surface roughness of the rough surface S is more preferably 110 nm to 190 nm, and most preferably 115 nm to 185 nm, in terms of arithmetic average roughness Ra.

  In addition, the surface roughness of the flat surface of the accommodation area | region R other than the rough surface S is 20 nm-80 nm by arithmetic mean roughness Ra, for example. Therefore, the flat surface of the non-arranged region Rb other than the rough surface S can be regarded as a flat surface due to the difference in the level of surface roughness from the rough surface S.

  In plan view, the area of the rough surface S is preferably 50% or less of the area of the accommodation region R (including the areas of the placement portion 3 and the positioning portion 4). When the area of the rough surface S exceeds 50% of the area of the accommodation region R, there is a possibility that dust is generated on the rough surface S during use of the glass plate tray 1. In this respect, the area of the rough surface S is more preferably 40% or less of the area of the accommodation region R, and most preferably 30% or less of the area of the accommodation region R.

  Moreover, it is preferable that the difference of the surface roughness of the rough surface S and the glass plate 2 is 100 nm-200 nm by arithmetic mean roughness Ra.

  When the difference in surface roughness between the rough surface S and the glass plate 2 is less than 100 nm in terms of arithmetic average roughness Ra, the difference between the glass plate 2 and the rough surface S cannot be sufficiently obtained in the image data. The position may not be recognized. When the difference in surface roughness exceeds 200 nm in arithmetic average roughness Ra, dust may be generated on the rough surface S during use of the glass plate tray 1. From this viewpoint, the difference in surface roughness is more preferably 110 nm to 160 nm in terms of arithmetic average roughness Ra, and most preferably 120 nm to 150 nm.

  As a manufacturing method of the glass plate tray 1, it is preferable to manufacture using the metal mold | die which gave blasting processes, such as sandblasting, in the position corresponding to the rough surface S previously. This is because when the glass plate tray 1 is directly blasted, there is a high possibility of dust generation on the rough surface S during use of the glass plate tray 1.

  The glass plate tray 1 of the present embodiment configured as described above can enjoy the following effects.

  The rough surface S is provided in the non-arrangement region Rb adjacent to the arrangement region Ra, and is provided from the non-arrangement region Rb to the arrangement region Ra. Thereby, the glass plate 2 arrange | positioned by arrangement | positioning area | region Ra and the rough surface S adjoin by planar view. Therefore, in the image data, the boundary between the glass plate 2 and the rough surface S becomes clear. Therefore, the position of the glass plate 2 can be easily recognized by the pickup device. That is, according to the glass plate tray 1 of the present embodiment, errors in position recognition of the glass plate 2 in the pickup device can be reduced.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the technical idea. For example, in the said embodiment, although the glass plate accommodated in a glass plate tray was rectangular shape, square shape may be sufficient and polygonal shape, circular shape, etc. may be sufficient.

DESCRIPTION OF SYMBOLS 1 Glass plate tray 2 Glass plate R Housing area Ra Arrangement area Rb Non-arrangement area S Rough surface

Claims (3)

A glass plate tray provided with a storage area that can store a plurality of glass plates in a flat state,
The accommodation area is divided into an arrangement area where the glass plate can be arranged, and a non-arrangement area other than the arrangement area,
A glass plate tray , wherein a rough surface having a surface roughness larger than that of the glass plate is provided only in a frame-like region including the non-arrangement region adjacent to at least a part of the arrangement region .   The placement area is rectangular;
  The glass plate tray according to claim 1, wherein the non-arrangement region included in the frame-shaped region is adjacent to at least a part of each side of the arrangement region. The glass plate tray according to claim 1 or 2 , wherein the rough surface is provided from the non-arrangement region to the arrangement region.

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