JP2022064375A - Transport container, transport device, and centering device - Google Patents

Abstract

To provide a transport container which can inhibit damage of a workpiece and damage or deformation of a tip of a bell fixture during centering, and to provide a transport device and a centering device.SOLUTION: A transport container includes: a workpiece tray which holds workpieces; a base tray which holds the workpiece tray; guide members which move the workpiece tray and the base tray close to or away from each other in a direction perpendicular to the base tray; and elastic members disposed between the workpiece tray and the base tray.SELECTED DRAWING: Figure 1

Description

The present invention relates to a transport container, a transport device and a centering device.

Patent Document 1 discloses a centering device that grinds an outer peripheral surface of a work (for example, an optical element). In this centering device, the work placed on the supply tray is moved to the lens holder by the pickup unit, and then the position and posture of the work are controlled according to the bell yatoy (upper bell yatoy) by the lens holder. Then, the work is adsorbed by the bell yatoy to center the work.

Japanese Unexamined Patent Publication No. 2014-176948

In the centering device disclosed in Patent Document 1, when the work is sucked by the bell yatoy, the work may be scratched, or the tip of the bell yatoy may be damaged or deformed.

The present invention has been made in view of the above, and provides a transport container, a transport device, and a centering device capable of suppressing damage to the work, damage to the tip of the bell yatoy, or deformation during centering. The purpose is to provide.

In order to solve the above-mentioned problems and achieve the object, the transport container according to the present invention includes a work tray for holding a plurality of works, a base tray for holding the work tray, and the work tray and the base tray. A guide member for vertically approaching or separating the distance from the base tray, and an elastic member arranged between the work tray and the base tray are provided.

Further, in the transport container according to the present invention, in the above invention, the work tray is a tray for holding the optical element which is the work, and the upper tray for holding the edge portion of the optical element and the optical element. A lower tray, which holds one of the two surfaces of the above, is provided.

Further, in the transport container according to the present invention, in the above invention, the upper tray is formed with a hole for inserting and removing the optical element, and the hole is tapered.

Further, in the above invention, the transport container according to the present invention is further provided with a spacer which is arranged between the upper tray and the lower tray and defines the distance between the upper tray and the lower tray.

Further, in the transport container according to the present invention, in the above invention, the lower tray is formed with a suction hole for sucking the optical element from the back surface of the lower tray.

In order to solve the above-mentioned problems and achieve the object, the transport device according to the present invention is transferred to the above-mentioned transport container and the work supply / discharge unit provided with a pickup tool for feeding / discharging the work from the transport container. And a transport mechanism for moving the transport container, the transport mechanism is a biaxial drive mechanism for aligning the position of the pickup tool with the positions of a plurality of workpieces mounted on the transport container. And a uniaxial drive mechanism for changing the position of the pickup tool and the distance from the work.

In order to solve the above-mentioned problems and achieve the object, the centering device according to the present invention includes the above-mentioned transport device, two bell yatoys whose central axes coincide with each other, and a grindstone for grinding the outer peripheral surface of the optical element. And, one of the two bell yatoys is the pickup tool.

In the transport container, transport device, and centering device according to the present invention, an elastic member is provided between the work tray of the transport container and the base tray, and the work tray approaches or separates vertically from the base tray. Is configured to be possible. As a result, the load when the bell yatoy comes into contact with the work can be dispersed by the elastic member, so that damage to the work and damage or deformation of the tip of the bell yatoy can be suppressed when centering is performed.

FIG. 1 is a schematic view showing an example of the configuration of a centering device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing an example of the configuration of the transport container according to the embodiment of the present invention. FIG. 3 is an enlarged cross-sectional view of part A of FIG. 2 taken out. FIG. 4 is a cross-sectional view showing a case where the optical element of FIG. 3 is changed to an optical element having a different shape. FIG. 5 is a cross-sectional view showing a state in which an optical element is sucked by an upper bell yatoy in a transport container according to an embodiment of the present invention. FIG. 6 is a flowchart showing a centering method using the centering device according to the embodiment of the present invention.

Hereinafter, embodiments of the transport container, transport device, and centering device according to the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments, and the components in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

(Centering device)
The configuration of the centering device according to the embodiment of the present invention will be described with reference to FIG. The centering device 1 according to the present embodiment is for performing a process of grinding the outer peripheral surface of the work (centering process). Specifically, the centering device 1 is a bell-type centering device that performs centering processing while sandwiching a work by a pair of bell yatoys.

Examples of the workpiece to be processed by the centering device 1 include an optical element (lens) in which optical surfaces (lens surfaces) facing each other are pre-polished. Further, as this optical element, for example, a lens in which two optical surfaces have a convex spherical shape, a lens in which two opposing optical surfaces both have a concave spherical shape, and two opposing optical surfaces have a concave spherical shape and a convex shape, respectively. Examples include a lens having a spherical shape, a lens having one of two opposing optical surfaces having a flat surface, and the like. In the conventional centering device 1, for example, an optical element having a minimum diameter of about 3 mm is targeted for processing, but in the centering device 1, for example, a minute optical element having a diameter of 2 mm or less can be processed.

As shown in FIG. 1, the centering device 1 has a transport unit 10 that transports an optical element to a clamp unit 20, a clamp unit 20 that clamps and holds the optical element by a pair of bell yatoys, and a process for grinding the optical element. A unit 40 and a control device 50 that controls the operation of the centering device 1 as a whole are provided.

Here, in FIG. 1, the direction of the work axis R1 is the vertical direction (Z direction), and the plane orthogonal to the Z direction is the horizontal plane (XY plane). Further, in the figure, the direction parallel to the paper surface is the X direction, and the direction orthogonal to the paper surface is the Y direction. Further, although not shown in the figure, the centering device 1 has an "automatic transfer button" for starting the transfer in the transfer section 10 and an "automatic machining" for starting the centering process in the machining section 40. "Buttons" are provided, and each process is started when the operator presses these buttons.

The transport unit 10 includes a transport table 11, a transport mechanism 12, a supply pallet 13, and a discharge pallet 14. Although not shown in FIG. 1, the transport unit 10 is provided with a transport mechanism for transporting the supply pallet 13 and the discharge pallet 14 to a predetermined position on the transport mechanism 12. Further, although the transport unit 10 is described as a part of the centering device 1 in the figure, the transport unit 10 may be provided as an independent transport device separate from the centering device 1.

The transport mechanism 12 is for moving the transport container for transporting the work to the clamp portion 20. Specifically, this transport container is composed of a supply pallet 13 and a discharge pallet 14. The transport mechanism 12 moves the supply pallet 13 and the discharge pallet 14 onto the work axis R1 when the optical element is centered. That is, when the transport mechanism 12 supplies the optical element to the clamp portion 20 and discharges the optical element from the clamp portion 20, the supply pallet 13 and the discharge pallet 14 are placed directly below the upper bell yatoy 22 of the clamp portion 20. Move it.

The transport mechanism 12 includes a first drive mechanism and a second drive mechanism. The first drive mechanism aligns the position of the upper bell yatoy 22 of the clamp portion 20 with the position of the center of a plurality of optical elements mounted on the supply pallet 13 and the discharge pallet 14 on the XY surface of FIG. It is a two-axis drive mechanism. The second drive mechanism is a uniaxial drive mechanism for changing the distance between the position of the upper bell yatoy 22 and the optical element in the Z direction of the figure.

The supply pallet 13 is a transport container on which the optical element before the centering process is placed. The supply pallet 13 is formed with a plurality of holes (holes 131a) for moving a plurality of optical elements in and out. Further, the supply pallet 13 is made of, for example, a resin material. The details of the supply pallet 13 will be described later (see FIGS. 2 to 4).

The discharge pallet 14 is a transport container on which the optical element after the centering process is placed. The discharge pallet 14 is formed with a plurality of holes for moving a plurality of optical elements in and out. Further, the discharge pallet 14 is made of, for example, a resin material. In the present embodiment, the supply pallet 13 and the discharge pallet 14 are described as separate configurations, but the supply pallet 13 may also serve as the discharge pallet 14.

The clamp portion 20 includes a lower bell yatoy 21, an upper bell yatoy 22, a lower spindle 23, an upper spindle 24, a slide rail 25, an upper spindle moving table 26, a work shaft rotation motor 27, and an upper spindle elevating drive motor 28. A base 29, an air blow nozzle 30, a grinding fluid nozzle 31, and a grinding fluid shutter 32 are provided. The clamp portion 20 also functions as a "work supply / discharge portion" for supplying / discharging the optical element.

The lower bell yatoy 21 and the upper bell yatoy 22 are for sandwiching an optical element during centering processing. The lower bell yatoy 21 and the upper bell yatoy 22 are arranged so as to face each other with their central axes (work axis R1) aligned with each other. That is, the lower bell yatoy 21 and the upper bell yatoy 22 are aligned with high accuracy on the XY plane.

Holes 21a and 22a are formed in the lower belly toy 21 and the upper belly toy 22 along the work axis R1, respectively. The holes 21a and 22a function as suction holes for sucking the optical element. Further, the hole portion 22a injects air when the optical element is placed on the discharge pallet 14.

The upper bell yatoy 22 functions not only as a function of sandwiching the optical element during centering processing, but also as a pickup tool for supplying and discharging the optical element from the supply pallet 13 and the discharge pallet 14. That is, the upper bell yatoy 22 sucks and picks up the optical element on the supply pallet 13 transported by the transport mechanism 12 at the start of the centering process, and places it on the tip of the lower bell yatoy 21. Further, at the end of the centering process, the upper bell yatoy 22 sucks and picks up the optical element placed on the tip of the lower belly toy 21 and places it on the discharge pallet 14 transported by the transport mechanism 12.

The lower spindle 23 is for holding the lower bell yatoy 21. In the centering device 1, the optical element is attracted by the tip of the upper bell yatoy 22 held by the upper spindle 24. After that, the upper spindle up / down drive motor 28 is driven to move the upper spindle 24 and the upper spindle moving table 26 downward, and the upper bell yatoy 22 is brought closer to the lower bell yatoy 21. Hold the optical surface of.

The upper spindle 24 is for holding the upper bell yatoy 22. The slide rail 25 is for guiding the upper spindle 24 and the upper spindle moving table 26, and is provided along the work axis R1. The upper spindle 24 is fixed to the upper spindle moving table 26.

The work shaft rotation motor 27 is for rotating the lower spindle 23 and the upper spindle 24 simultaneously or independently with respect to the work shaft R1. The upper spindle elevating drive motor 28 moves the upper spindle 24 and the upper spindle moving table 26 along the work axis R1. The work shaft rotation motor 27 and the upper spindle elevating drive motor 28 operate based on the control of the control device 50, but the operation can also be manually controlled (ON / OFF) by the user. The lower spindle 23 and the work shaft rotation motor 27 are fixed to the base 29.

The air blow nozzle 30 ejects air to the optical element when the outer peripheral surface of the optical element is ground by the grindstone 41. The grinding fluid nozzle 31 ejects the grinding fluid to the optical element when the outer peripheral surface of the optical element is ground by the grindstone 41.

The grinding fluid shutter 32 is for blocking the clamp portion 20 and the processed portion 40 from the outside. The grinding fluid shutter 32 is configured to be openable / closable (sliding) in the Z direction. For example, when the outer peripheral surface of the optical element is ground by the grindstone 41, by closing the grinding fluid shutter 32, it is possible to suppress the scattering of the grinding fluid to the outside of the centering device 1.

The processing unit 40 includes a grindstone 41, a grindstone rotation motor 42, a slide rail 43, a grindstone moving table 44, and a grindstone shaft drive motor 45.

The grindstone 41 is configured to be rotatable around a grindstone shaft R2 provided in parallel with the work shaft R1. The grindstone 41 is formed in a disk shape, for example, and the disk-shaped outer peripheral surface 41a is a grinding surface. While rotating the grindstone 41, the grindstone shaft drive motor 45 is driven to move the grindstone moving table 44 to the right in the figure, and the outer peripheral surface 41a is brought into contact with the outer peripheral surface of the optical element to bring the outer peripheral surface 41a into contact with the outer peripheral surface of the optical element. The surface is ground.

The grindstone rotation motor 42 is for rotating the grindstone 41. The slide rail 43 is for guiding the grindstone moving table 44, and is provided along a direction (X direction) orthogonal to the grindstone axis R2. A grindstone rotation motor 42 is installed on the grindstone moving table 44. The grindstone shaft drive motor 45 is for moving the grindstone moving table 44 along the slide rail 43.

Although not shown in FIG. 1, the machined portion 40 is also provided with a mechanism for moving the grindstone 41 in the vertical direction. Specifically, the machined portion 40 is provided with a slide rail provided along the direction (Z direction) of the grindstone axis R2 to guide the grindstone moving table 44 in the vertical direction, and the grindstone moving table 44 along the ride rail. A drive motor for moving the wheel is provided.

Here, in the conventional centering device disclosed in Patent Document 1, the optical element placed on the supply pallet is once moved to the lens holder by the pickup unit, and the position and orientation of the optical element are controlled by the lens holder. I do. Then, after the optical element is attracted by the upper bell yatoy, the lens holder is retracted and the upper bell yatoy is lowered to perform centering processing. Therefore, in the conventional centering device disclosed in Patent Document 1, for example, when processing a minute optical element having a diameter of 2 mm or less, an optical element having a small edge portion, or the like, the tip of the upper bell yatoy or the optical element is used. There was a risk of damage.

On the other hand, in the centering device 1 according to the present embodiment, the supply pallet 13 provided with the shock absorber is moved to just below the upper bell yatoy 22 without using the pickup unit or the lens holder, and the upper bell yatoy 22 is used to move the center of the optical element. Is adsorbed and picked up. As a result, damage to the tip or the optical element of the upper bell yatoy 22 can be suppressed even when processing a minute optical element, an optical element having a small edge portion, or the like. Further, since it is not necessary to provide the pickup unit and the lens holder in the centering device 1, the device configuration can be simplified and the cost can be reduced.

(Transport container)
The configuration of the transport container according to the embodiment of the present invention will be described with reference to FIGS. 2 to 4. In the present embodiment, the configuration of the supply pallet 13 will be described as a specific example of the transport container.

The supply pallet 13 includes an upper tray 131, a lower tray 132, a shaft 133, a spacer 134, a base tray 135, a guide member 136, and an elastic member 137. Among the components of the supply pallet 13, the upper tray 131 and the lower tray 132 function as work trays for holding the plurality of optical elements W.

The upper tray 131 is for holding the edge portion of the optical element W. A plurality of holes 131a and 131b are formed in the upper tray 131. The hole 131a is for accommodating the optical element W. Further, the hole 131b is for inserting a shaft 133 that aligns the positions of the upper tray 131 and the lower tray 132.

The details of the hole 131a will be described with reference to FIG. 3, which is an enlarged view of the A portion of FIG. Specifically, the hole 131a is composed of a first hole 1311 and a second hole 1312. The first hole portion 1311 is a region for guiding the optical element W to the second hole portion 1312, and is formed in a tapered shape. That is, the first hole portion 1311 is formed to have a smaller diameter from the upper side to the lower side when viewed in cross section as shown in FIG. 4, and is formed in a truncated cone-like space as a whole. Further, the second hole portion 1312 is a region that abuts on the outer peripheral surface of the optical element W, and is formed vertically. That is, the first hole portion 1311 is formed in a conical space as a whole.

Here, it is preferable that the height H1 of the second hole portion 1312 is higher than the height H2 of the edge portion of the optical element W. In this way, by making the height H1 of the second hole portion 1312 higher than the height H2 of the edge portion of the optical element W, the optics when the optical element W is housed in the second hole portion 1312. The lateral displacement of the element W can be suppressed.

The height H1 of the second hole portion 1312 changes the thickness of the spacer 134 arranged in the gap G between the upper tray 131 and the lower tray 132, and by changing the size of the gap G between the two. Can be adjusted. For example, as shown in FIG. 4, when handling the optical element W1 whose edge height is lower than that of the optical element W of FIG. 3, the gap G is formed by using the spacer 134 having a thickness smaller than that of FIG. Make it smaller. Thereby, the height H1 of the second hole portion 1312 can be made higher than the height H2 of the edge portion of the optical element W1.

Returning to FIG. 2, the remaining configuration of the supply pallet 13 will be described. The lower tray 132 is for holding one of the two surfaces of the optical element W. A plurality of holes 132a are formed in the lower tray 132. The hole 132a functions as a suction hole for sucking the optical element W from the back surface of the lower tray 132 and a discharge hole for discharging the grinding fluid.

The spacer 134 is for defining the distance (the size of the gap G) between the upper tray 131 and the lower tray 132. The spacer 134 is arranged between the upper tray 131 and the lower tray 132. Further, the spacer 134 is composed of, for example, an annular member having a hole corresponding to the outer diameter of the shaft 133. The specific thickness of the spacer 134 is determined according to the thickness of the edge portion of the optical element W. For example, as shown in FIGS. 3 and 4, the thickness of the spacer 134 becomes smaller as the thickness of the edge portion of the optical element W becomes larger.

The base tray 135 is for holding the lower tray 132. The guide member 136 is for allowing the distance between the lower tray 132 and the base tray 135 to approach or separate perpendicularly to the base tray 135. Specifically, the guide member 136 is composed of a linear bush 136a and a linear shaft 136b inserted into the linear bush 136a.

The linear bush 136a is embedded in the base tray 135. Further, one end side of the linear shaft 136b is embedded in the lower surface of the lower tray 132. The elastic member 137 is arranged between the lower tray 132 and the base tray 135, and keeps the size of the gap between the lower tray 132 and the base tray 135 constant. The elastic member 137 and the guide member 136 function as a buffering mechanism for cushioning the load applied to the upper tray 131 and the lower tray 132. In addition to the mechanism shown in FIG. 2, the guide member 136 shall employ various mechanisms capable of operating the work trays (upper tray 131 and lower tray 132) in parallel in the vertical direction. It is particularly preferable to use a mechanism capable of forming a tilt and causing less inclination.

In the supply pallet 13 having such a configuration, for example, as shown in FIG. 5, when the upper bell yatoy 22 is brought into contact with the optical element W in order to pick up the optical element W from the supply pallet 13 during the centering process. , The elastic member 137 contracts. Then, the upper tray 131 and the lower tray 132 approach each other perpendicularly to the base tray 135, and the gap between the lower tray 132 and the base tray 135 is narrowed.

In the present embodiment, only the configuration of the supply pallet 13 has been specifically described, but the discharge pallet 14 has a hole portion (hole portion) for accommodating at least the optical element W in the configuration of the supply pallet 13. It suffices to have a hole portion (corresponding to the hole portion 132a) for attracting the optical element W (corresponding to 131a). Further, the discharge pallet 14 may have the same configuration as the supply pallet 13.

(How to take care of yourself)
The centering method by the centering device 1 according to the embodiment of the present invention will be described with reference to FIG. It should be noted that each process described in the figure is mainly carried out by the control device 50. Further, in the figure, the processes of steps S1, S5 to S7, S9 to S18, S21, S22, and S25 listed on the left side show the processes to be performed in the clamp portion 20 and the processing portion 40, and are listed on the right side. The processes of steps S2 to S4, S8, S19, S20, S23, and S24 are shown to be performed in the transport unit 10. Further, in the figure, each step is listed in chronological order, and the steps shown at the same positions on the left and right (for example, step S1 and step S2, etc.) indicate processes performed at substantially the same time.

First, the operator presses the automatic machining button (step S1). Subsequently, when the automatic transfer button is pressed by the operator (step S2), the control device 50 starts the transfer of the supply pallet 13 by the transport mechanism 12 (step S3).

Subsequently, the control device 50 determines whether or not the supply pallet 13 has arrived at a predetermined position (step S4). When it is determined that the supply pallet 13 has not arrived at the predetermined position (No in step S4), the control device 50 returns to step S4. On the other hand, when it is determined that the supply pallet 13 has arrived at a predetermined position (Yes in step S4), the control device 50 lowers the upper bell yatoy 22 (step S5) and turns the upper bell yatoy 22 into suction ON (step S6). .. As a result, the optical element W of the supply pallet 13 is picked up by the upper bell yatoy 22 and placed on the tip of the lower belly toy 21.

If the optical element W cannot be sucked in step S6, the control device 50 turns off the upper bell yatoy 22 and repeats steps S5 and S6. If the optical element W cannot be sucked even after repeating steps S5 and S6 three times, the control device 50 suspends this process and displays a suction error on, for example, a display device connected to the centering device 1. I do.

Subsequently, the control device 50 raises the upper bell yatoy 22 (step S7) and retracts the supply pallet 13 to the outside of the grinding fluid shutter 32 (step S8). Subsequently, the control device 50 turns off the lower bell yatoy 21 by suction (step S9) and closes the grinding fluid shutter 32 (step S10). Subsequently, the control device 50 lowers the upper bell yatoy 22 (step S11), and holds and clamps the optical element W by the lower bell yatoy 21 and the upper bell yatoy 22 (step S12).

Subsequently, the control device 50 turns the upper bell yatoy 22 and the lower bell yatoy 21 into suction OFF (step S13), and starts processing the optical element W (step S14). When the processing of the optical element W is completed (step S15), the control device 50 opens the grinding fluid shutter 32 (step S16). Subsequently, the control device 50 turns the upper bell yatoy 22 into suction ON (step S17), and raises the upper bell yatoy 22 while adsorbing the optical element W (step S18).

Subsequently, the control device 50 starts transporting the discharge pallet 14 by the transport mechanism 12 (step S19). Subsequently, the control device 50 determines whether or not the discharge pallet 14 has arrived at a predetermined position (step S20). When it is determined that the discharge pallet 14 has not arrived at the predetermined position (No in step S20), the control device 50 returns to step S20. On the other hand, when it is determined that the discharge pallet 14 has arrived at a predetermined position (Yes in step S20), the control device 50 lowers the upper bell yatoy 22 (step S21) and turns the upper bell yatoy 22 into suction OFF (step S22). .. As a result, the processed optical element W is discharged by the upper bell yatoy 22, and the optical element W is housed in the hole formed in the discharge pallet 14.

If the optical element W cannot be discharged in step S22, the control device 50 determines whether or not the optical element W remains in the upper bell yatoy 22. If the optical element W cannot be discharged even after repeating the determination three times, the control device 50 suspends this process and displays a discharge error on, for example, a display device connected to the centering device 1.

Subsequently, the control device 50 determines whether or not the optical element W is the final work, that is, whether or not all the optical elements W have been processed (step S23). When it is determined that the optical element W is the final work (Yes in step S23), the control device 50 retracts the discharge pallet 14 (step S24), and ends this process. On the other hand, when it is determined that the optical element W is not the final work (No in step S23), the control device 50 returns to step S3.

In the transport container, transport device, and centering device according to the present embodiment as described above, the elastic member 137 is provided between the lower tray 132 and the base tray 135 of the supply pallet 13, and the upper tray 131 and the upper tray 131 and the center tray 135 are provided. The lower tray 132 is configured to be able to approach or separate vertically from the base tray 135. As a result, the load when the upper bell yatoy 22 comes into contact with the optical element W can be dispersed by the elastic member 137, so that the optical element W is damaged and the tip of the upper bell yatoy 22 is damaged during the centering process. Alternatively, deformation can be suppressed.

Further, in the transport container, the transport device, and the centering device according to the present embodiment, when the optical element W is supplied to the clamp portion 20, the supply pallet 13 is moved to directly below the upper bell yatoy 22 by the transport mechanism 12. After that, the position of the upper bell yatoy 22 on the XY surface and the position of the optical element W mounted on the supply pallet 13 are aligned by the first drive mechanism of the transport mechanism 12, and the optical element W is picked up from the supply pallet 13. .. Further, when the optical element W is discharged from the clamp portion 20, the discharge pallet 14 is moved to just below the upper bell yatoy 22 by the transport mechanism 12, and then on the XY surface by the first drive mechanism of the transport mechanism 12. The position of the upper bell yatoy 22 and the position of the hole of the discharge pallet 14 are aligned, and the optical element W is housed in the discharge pallet 14. As a result, the center position of the optical element W can be accurately held, and lateral displacement when the optical element W is taken in and out is suppressed.

Further, the transport container, the transport device, and the centering device according to the present embodiment include a guide member 136 that vertically approaches or separates the upper tray 131 and the lower tray 132 from the base tray 135. As a result, lateral displacement of the optical element W is suppressed when the optical element W before processing is picked up from the supply pallet 13 or when the optical element W after processing is accommodated in the discharge pallet 14, and the optical element W is highly accurate. It is possible to put it in and out of.

Further, in the transport container, the transport device, and the centering device according to the present embodiment, the work tray on which the optical element W is placed is divided into an upper tray 131 and a lower tray 132, and a spacer 134 is provided between the two. Is provided. Thereby, by changing the thickness of the spacer 134, it is possible to handle a plurality of types of optical elements W having different shapes and thicknesses of the edge portions. That is, it is possible to hold a plurality of types of optical elements W by one upper tray 131 without preparing a plurality of upper trays 131 according to the thickness of the edge portion of the optical element W.

Further, in the transport container, the transport device, and the centering device according to the present embodiment, the work tray on which the optical element W is placed is divided into the upper tray 131 and the lower tray 132, so that the edge portion of the optical element W is divided. The hole 131a for holding the above can be formed as a through hole instead of the conventional counterbore hole. As a result, when the hole 131a is machined, the clearance between the outer peripheral surface of the optical element W and the hole 131a can be formed extremely small.

Further, in the transport container, the transport device, and the centering device according to the present embodiment, due to these actions and effects, even a minute lens can be centered with high accuracy without being damaged.

Further, in the transport container, the transport device, and the centering device according to the present embodiment, the hole 131a is formed not as a counterbore hole but as a through hole, and since there is no corner in the hole 131a, the cleaning property is improved. improves.

Further, in the transport container, the transport device, and the centering device according to the present embodiment, since the hole 131a (first hole 1311) of the supply pallet 13 is formed in a tapered shape, the hole 131a and the optical element are formed. Even when the clearance with the outer peripheral surface of W is extremely small, the optical element W does not bite into the opening of the hole 131a. As a result, the optical element W can be taken in and out accurately, and damage to the optical element W and defective removal can be suppressed.

Further, in the transport container, the transport device, and the centering device according to the present embodiment, the hole 132a for sucking the optical element W directly under the optical element W of the lower tray 132 of the supply pallet 13 (and the discharge pallet 14). Is formed. As a result, for example, when the optical element W is placed on the supply pallet 13 (and the discharge pallet 14), even if air is injected from the upper bell yatoy 22, the optical element W is attracted from the hole 132a to obtain optics. The element W can be reliably accommodated. Further, in a state where the optical element W is sucked from the hole 132a, the supply pallet 13 (and the discharge pallet 14) can be tilted sideways.

The transport container, transport device, and centering device according to the present invention have been specifically described above in terms of embodiments for carrying out the invention, but the gist of the present invention is not limited to these descriptions, and claims for a patent. Must be broadly interpreted based on the description of the scope of. Needless to say, various changes, modifications, etc. based on these descriptions are also included in the gist of the present invention.

1 Centering device 10 Transport unit 11 Transport stand 12 Transport mechanism 13 Supply pallet 131 Upper tray 131a, 131b Hole 1311 First hole 1312 Second hole 132 Lower tray 132a Hole 133 Shaft 134 Spacer 135 Base tray 136 Guide member 136a Linear bush 136b Linear shaft 137 Elastic member 14 Discharge pallet 20 Clamp part 21 Lower bell grindstone 21a Hole 22 Upper bell yatoy 22a Hole 23 Lower spindle 24 Upper spindle 25 Slide rail 26 Upper spindle Moving table 27 Work shaft rotation motor 28 Upper Spindle elevating drive motor 29 Base 30 Air blow nozzle 31 Grinding liquid nozzle 32 Grinding liquid shutter 40 Machining part 41 Grindstone 41a Outer peripheral surface 42 Grindstone rotation motor 43 Slide rail 44 Grindstone moving table 45 Grindstone shaft drive motor R1 Work shaft R2 Grindstone shaft W, W1 Optical element

Claims (7)

A work tray that holds multiple workpieces and
The base tray that holds the work tray and
A guide member that causes the work tray and the base tray to approach or separate from each other perpendicularly to the base tray.
An elastic member arranged between the work tray and the base tray,
Conveyance container equipped with. The work tray is
It is a tray for holding the optical element which is the work.
The upper tray that holds the edge of the optical element and
A lower tray that holds one of the two surfaces of the optical element,
The transport container according to claim 1. The upper tray is formed with a hole for inserting and removing the optical element.
The hole has a tapered shape.
The transport container according to claim 2. Further comprising a spacer disposed between the upper tray and the lower tray and defining the distance between the upper tray and the lower tray.
The transport container according to claim 2 or 3. The lower tray is formed with suction holes for sucking the optical element from the back surface of the lower tray.
The transport container according to any one of claims 2 to 4. The transport container according to any one of claims 1 to 5.
A transport mechanism for moving the transport container from the transport container to a work supply / discharge section provided with a pick-up tool for feeding / discharging the work.
Equipped with
The transport mechanism is
A biaxial drive mechanism for aligning the position of the pickup tool with the positions of a plurality of workpieces placed on the transport container.
A uniaxial drive mechanism for changing the position of the pickup tool and the distance between the work and the work.
A transport device equipped with. The transport device according to claim 6 and
Two bell yatoys whose central axes match each other,
A grindstone that grinds the outer peripheral surface of the optical element,
Equipped with
One of the two bell ya toys is the pickup tool,
Centering device.

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