JP2014080240A - Workpiece housing container and optical element housing container using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a workpiece housing container and an optical element housing container which have less attachment of impurity due to heat treatment.SOLUTION: According to the workpiece housing container 1,11,12,13 of the present invention, the container comprises a plate-like body 2 having recesses 3 for housing a workpiece 10, in which a recess 3f which is positioned at the outermost circumferential side of the plate-like body 2 and the outside of the plate-like body 2 are connected by a through-hole 5, so that gas generated in performing heat treatment to the workpiece 10 can be discharged to the outside via the through-hole 5, and gas cooled down on a temperature-decreasing stage of heat treatment can be prevented from becoming impurity and attaching to the workpiece 10. Further, the optical element housing container 21 of the present invention consists of the workpiece housing container 12 of the present invention, and optical elements 23 are housed in the recesses 3, so that attaching of impurity on the surface of the optical element 23 can be suppressed.

Description

  The present invention relates to a work storage container and an optical element storage container using the same.

  When heat-treating a workpiece, it is known to use a container made of a steel material or ceramic having high heat resistance as a container for individually storing the workpiece.

  For example, Patent Document 1 discloses a heat treatment tray in which a plurality of pockets are provided on one main surface side of a substrate made of a laminate of ceramic sheets.

JP 2005-213086 JP

  However, in the heat treatment tray described in Patent Document 1, when the work is stored in the pocket and the heat treatment is performed, the gas generated from the work stored in the pocket tends to stay in the pocket, and after the heat treatment, the gas is There was a risk of becoming an impurity and adhering to the surface of the workpiece.

  The present invention has been devised to solve the above-described problems, and an object of the present invention is to provide a work storage container that can suppress deposits on the work surface and an optical element storage container using the same. It is what.

  The workpiece storage container of the present invention includes a plate-like body having a recess for storing a workpiece, and the recess located on the outermost peripheral side of the plate-like body and the outside of the plate-like body are through holes. It is characterized by being connected.

  The optical element storage container of the present invention comprises the work storage container having the above-described configuration, and the optical element is stored in the concave portion.

  According to the workpiece storage container of the present invention, the plate-like body having a recess for storing the workpiece is provided, and the recess located on the outermost peripheral side of the plate-like body and the outside of the plate-like body are through holes. Therefore, the gas staying in the recess can be discharged from the through hole to the outside, and the adhesion of impurities on the workpiece surface can be suppressed.

  Further, the optical element storage container of the present invention is composed of the work storage container having the above-described configuration, and the optical element is stored in the concave portion, so that the adhesion of impurities on the surface of the optical element can be suppressed.

An example of the workpiece storage container of the present embodiment is shown, (a) is a perspective view of a plate-like body constituting the workpiece storage container, (b) is a plan view of one main surface side of the plate-like body. (C) is a cross-sectional view taken along line AA ′ of (a). An example of the opening part of the 1st recessed part of the container for workpiece | work storage of this embodiment is shown, (a)-(c) is a top view of the opening part seen from the one main surface side, respectively, circular shape and square shape And a hexagonal shape. An example of the bottom face of the 1st recessed part of the workpiece | work storage container of this embodiment is shown, (a)-(d) is a top view seen from the one main surface side, respectively, circular shape, square shape, hexagonal shape, and It is a cross shape. The other example of the container for workpiece | work storage of this embodiment is shown, (a) is a perspective view of the plate-shaped body which comprises the container for workpiece | work storage, (b) is the plane of one main surface side of a plate-shaped body. It is a figure, (c) is sectional drawing of the BB 'line | wire of (a). It is a top view which shows another example of the container for workpiece | work storage of this embodiment. FIG. 6 is a partial cross-sectional view showing an example of the formation position of the through hole of the work storage container of the present embodiment shown by the C-C ′ line in FIG. 5. It is a partial sectional view of the circumference including a recess showing still another example of the workpiece storage container of the present embodiment, and shows that the plate-like body is made of a laminate. It is a fragmentary sectional view showing an example of the formation position of the penetration hole of the container for work storage of this embodiment shown in the CC 'line of Drawing 5, and (a)-(c) is the bottom of the 1st crevice. The workpiece is supported and the through hole is below the bottom surface of the first recess. (D) is the same as (a) in the position of the through hole, but the support of the workpiece is the bottom surface of the second recess. (A) is sectional drawing to which the D section enclosed with the wavy line shown in FIG.8 (b) of the container for workpiece storage of this embodiment or the E section enclosed with the wavy line shown in FIG.8 (d) was expanded, (b ) Is a schematic diagram when the bottom surface of the first recess or the bottom surface of the second recess is viewed at a particle level in plan view. It is a perspective view which shows another example of the workpiece | work storage container of this embodiment. It is sectional drawing which shows an example of the container for optical element accommodation of this embodiment.

  Embodiments of the present invention will be described below.

  An example of the embodiment of the flow path member of the present invention will be described with reference to FIGS.

  1A and 1B show an example of a work storage container according to the present embodiment. FIG. 1A is a perspective view of a plate-like body constituting the work storage container, and FIG. 1B is one main surface side of the plate-like body. (C) is sectional drawing of the AA 'line of (a).

  Moreover, FIG. 2 shows an example of the opening part of the 1st recessed part of the container for workpiece | work storage of this embodiment, (a)-(c) is a top view of the opening part seen from one main surface side, FIG. 3 shows an example of the bottom surface of the first concave portion of the work storage container of the present embodiment. (A) to (d) are from one main surface side. It is the seen top view, and is circular shape, square shape, hexagon shape, and cross shape, respectively.

  A workpiece storage container 1 shown in FIG. 1 includes a plate-like body 2 having a recess 3 for storing a workpiece 10, and includes a recess 3 located on the outermost side of the plate-like body 2 and the outside of the plate-like body 2. It is important that these are connected at the through hole 5.

  According to the workpiece storage container 1 of the present embodiment, the recess 3 for storing the workpiece 10 is provided on the one main surface 2 a side of the plate-like body 2, and the recess 3 located on the outermost peripheral side of the plate-like body 2. Since the workpiece 10 and the outside of the plate-like body 2 are connected by the through-hole 5, for example, when the workpiece 10 is heat-treated using it as a heat treatment container, the gas generated from the workpiece 10 passes through the through-hole from the inside of the recess 3. 5 will be discharged to the outside through 5. Thereby, it is possible to suppress the gas cooled in the temperature lowering stage of the heat treatment from becoming an impurity and adhering to the workpiece 10.

  Also, external heat can be transmitted to the work storage container 1 through the through hole 5. Thereby, temperature variation in the workpiece storage container 1 can be suppressed, and variations in size, strength, and the like due to heat treatment of the workpiece 10 can also be suppressed.

  In the work storage container 1 of the present embodiment, the recess 3 of the work storage container 1 includes a first recess 3a and a second recess 3b that is narrower than the first recess 3a in a cross-sectional view. In this example, the workpiece 10 is supported by the bottom surface 3c of the first recess 3a. In addition, the shape of the recessed part 3 does not necessarily need to be provided with the 1st recessed part 3a and the 2nd recessed part 3b, For example, the inner surface of the recessed part 3 may be straight shape or a taper shape. Furthermore, it is good also as a form which accommodates the workpiece | work 10 in the 2nd recessed part 3b.

  Furthermore, the planar shape of the opening of the first recess 3a can accommodate a workpiece to be heat-treated, such as a circular shape in FIG. 2A, a rectangular shape in FIG. 2B, or a hexagonal shape in FIG. The shape is not limited to this as long as it has a shape.

  Further, the bottom surface 3c of the first recess and the opening of the second recess 3b have a circular shape in FIG. 3 (a), a square shape in (b), a hexagonal shape in (c), or a cross shape in (d). The shape is not limited to this as long as it can accommodate the workpiece to be heat-treated.

  Furthermore, the cross-sectional shape of the through-hole 5 is not limited to a circular shape, a square shape, a triangular shape, or the like as long as there is no problem in the strength of the work storage container 1 and gas can be discharged to the outside.

  Although FIG. 1 shows an example in which the workpiece storage container 1 has a total of four recesses 3 in two rows and two columns, the present invention is not limited to this. For example, even if there is one recess 3 Good.

  4A and 4B show another example of the work storage container according to the present embodiment. FIG. 4A is a perspective view of a plate-like body constituting the work storage container, and FIG. 4B is one main body of the plate-like body. It is a top view of a surface side, (c) is sectional drawing of the BB 'line of (a).

  A workpiece storage container 11 shown in FIG. 4 includes a plurality of recesses 3 on one main surface 2 a side of the plate-like body 2, and the recesses 3 aligned in the vertical direction in FIG. Communicate. In the following drawings, a recess having a through hole communicating with the outside is denoted by 3f, and the other recess is denoted by 3g. Further, in the present embodiment, it is not necessary that all of the concave portions 3 positioned on the outermost peripheral side communicate with the outside, and if the concave portions 3 communicate with each other, at least one of the concave portions 3 positioned on the outermost peripheral side. It is only necessary that one has a through hole communicating with the outside.

  As described above, when the recess 3f and the recess 3g communicate with each other through the through-hole 5 and communicate with the outside, the recess 3g is used when the workpiece is stored in the workpiece storage container 11 of this embodiment and used as a heat treatment container. Can be discharged to the outside through the through hole 5 provided in the recess 3f located on the outer peripheral side. As a result, it is possible to suppress the gas that has cooled the workpiece storage container including the plurality of recesses 3 from being cooled at the stage of the heat treatment and becoming attached to the workpiece 10 as impurities.

  Further, since the recess 3 f and the recess 3 g communicate with each other through the through hole 5, external heat can be transmitted to the workpiece storage container 11 through the through hole 5. As a result, temperature variations in the workpiece storage container 11 can be suppressed, and variations in dimensions, strength, and the like due to heat treatment of the workpiece 10 can also be suppressed.

Up to this point, in the work storage containers 1 and 11 according to the present embodiment, the through holes 5 have been described as being formed in only one direction with respect to the plurality of recesses 3. May be provided.

  FIG. 5 is a plan view showing still another example of the work storage container of the present embodiment, and shows a work storage container 12 in which through holes 5 are formed in a lattice shape with respect to the plurality of recesses 3. .

  Thus, by providing the through holes 5 in a lattice shape, the gas generated when the workpiece 10 is further heat-treated can be easily discharged to the outside. Thereby, it is possible to further suppress the gas cooled in the temperature lowering stage of the heat treatment from becoming an impurity and adhering to the workpiece 10.

  In addition, since external heat can be efficiently transferred into the workpiece storage container 1 through the through hole 5, temperature variation in the workpiece storage container 12 can be suppressed, and the dimensions and strength of the workpiece 10 due to heat treatment can be suppressed. Such variations can be further suppressed.

  Although the case where the through-holes 5 are formed in one direction or in a lattice shape has been described, it is sufficient that the gas generated when the workpiece 10 is heat-treated can be discharged to the outside. What is necessary is just to set suitably the place of the through-hole 5, a number, a shape, etc. according to the kind of gas, the intensity | strength of the storage containers 1,11,12, the firing atmosphere, etc. suitably.

  By the way, in the work storage container used for such heat treatment, a certain amount of clearance is provided in advance between the work and the inner peripheral surface of the recess of the storage container in order to make it easier to put the work into the storage container. Therefore, although it is easy to put the workpiece into the concave portion, the workpiece may move in the concave portion during transportation or movement in each device, and there is a possibility that unevenness may occur in the heat treatment or jump out of the concave portion.

  FIG. 6 is a partial cross-sectional view showing an example of the formation position of the through hole of the work storage container of the present embodiment shown by the C-C ′ line in FIG. 5. In the work storage container 12, the convex portion 4 is provided on the bottom surface side of the inner side surface 3 h of the concave portion 3. FIG. 6 shows a case where the workpiece 10 is placed on the bottom surface 3c of the first recess 3a, and shows an example in which the projection 4 is provided on the bottom surface 3c side of the first recess 3a.

  With such a configuration, it is easy to put the workpiece 10 into the first recess 3a by providing a wide clearance between the workpiece 10 and the first recess 3a on the one main surface 2a side. Further, by providing the convex portion 4 on the bottom surface 3c side, the clearance is narrowed, and it is possible to suppress the workpiece 10 from moving in the first concave portion 3a. Thereby, it is possible to suppress the possibility of unevenness in the heat treatment and the workpiece 10 from jumping out of the recess. In addition, by providing the convex portion 4, the surface area of the first concave portion 3 a can be increased and the radiant heat from the first concave portion 3 a can be increased, so that the heat treatment time of the workpiece 10 can be shortened.

In order to obtain such a configuration, although it depends on the outer shape and thickness of the workpiece 10, the clearance between the first recess 3a and the workpiece 10 is set to 0.3 to 2.5 mm on the one main surface 2a side, and the bottom surface 3c side. What is necessary is just to make it become 0.05 mm-1.0 mm (the height of the convex part 4 is 0.02 mm-0.50 mm) in the location of the convex part 4.

  Moreover, it is preferable that the convex part 4 is provided so that the vertex of the convex part 4 may be located in the range of the height (thickness) direction on the outer peripheral surface of the workpiece 10, and in this case, the inner surface of the concave part 3 is provided. However, it is also possible to adopt a configuration in which a plurality of ones having a length of 1/10 or less of the entire circumference is provided. Incidentally, it is preferable that the height of the convex portion 4 is uniform. In this case, the workpiece 10 can be accommodated near the center of the bottom surface 3c of the first concave portion 3a. Variation can be further suppressed.

  In addition, the height of the convex part 4 here means that one concave part 3 is cut at three points, and in each cut sectional view, an arbitrary place other than the convex part 4 on the inner side surface 3h is taken at five points, and the average It is the distance from the highest place of the convex part 4 when the place of (2) is used as a reference. Moreover, the height of the convex part 4 being uniform means that the variation in height when taking six points on the convex part 4 falls within the range of 40% of the height dimension of the convex part 4. It only has to be.

  In addition, the measurement of the height of a convex part can confirm the cut surface cut | disconnected so that the 1st recessed part of a storage container may enter using a well-known optical microscope, a microscope, etc.

  Incidentally, in the above-described example, the configuration in which the convex portion 4 is provided in the first concave portion 3a has been described. However, for example, when the workpiece 10 is stored in the second concave portion 3b, the convex portion 4 is provided in the second concave portion 3b. What is necessary is just to provide in the recessed part 3b. The same applies to the work storage containers 1 and 11 of the present embodiment.

  The plate-like body 2 of the work storage containers 1, 11, 12 of the present embodiment is preferably made of ceramic. For example, when used as a heat treatment container, it has high heat resistance and can be used for repeated heat treatment. Also, for example, when the work storage containers 1, 11 and 12 are used as storage or sterilization containers for the work 10, a ceramic having high corrosion resistance even if exposed to a gas or liquid atmosphere corroding if it is metal. By forming with, it is possible to suppress the occurrence of problems such as corrosion.

  Here, ceramics used for the work storage containers 1, 11, 12 include alumina, silicon nitride, aluminum nitride, mullite, silicon carbide, boron carbide, cordierite, zirconia, and composites thereof, or carbonized. The silicon plate-like body 2 may be coated with alumina, zirconia or the like so that the carbon component does not adhere to the workpiece 10 on the surface layer of at least the recess 3.

  Further, the plate body may be made of heat-resistant steel, and at least the surface layer of the recess 3 may be coated with ceramics such as alumina.

  The plate-like body 2 made of ceramic is produced by a method of laminating and firing a plurality of ceramic green sheets that have been drilled by laser or press molding, or after forming a molded body having the recesses 3 by powder press molding. There is a method of forming the through-hole 5 by drilling and firing, and a method of producing the fired plate-like body 2 by a single process or a combination of a plurality of processes such as laser processing, cutting, blasting or drilling. .

  FIG. 7 is a partial sectional view of the periphery including a recess showing still another example of the work storage container of the present embodiment, and shows an example in which the plate-like body is formed of a laminate.

  When the plate-like body 2 of the work storage containers 1, 11, 12 of the present embodiment is a laminated body in which a plurality of sheets 2 d are laminated, even if the shape of the concave portion 3 or the shape of the through hole 5 is complicated. Can be easily manufactured.

  For example, when the laminated body is made of ceramic, a through-hole that becomes the recess 3 is formed in the green ceramic green sheet by laser or punching, and a portion that becomes the protrusion 4 is formed by laser or the like. A desired plate-like body 2 can be produced by forming grooves to be the holes 5 in the formed body by laser or punching, laminating these ceramic green sheets, and firing them at a predetermined temperature after pressing.

In the work storage container of the present embodiment, the recess is connected to the first recess that opens on one main surface of the plate-like body, and the first recess, and is narrower than the first recess in a cross-sectional view. It is preferable that the through hole is in communication with the first concave portion or the second concave portion.

  1 is provided with a plurality of recesses 3 in a plate-like body 2, and the recesses 3 include a first recess 3 a that opens on the first main surface 2 a side of the plate-like body 2, and The second recess 3b is connected to the first recess 3a and is narrower than the first recess 3a in cross-sectional view, and the through hole 5 communicates with the first recess 3a.

  Here, the concave portion 3 includes the first concave portion 3a and the second concave portion 3b that is connected to the first concave portion 3a and is narrower than the first concave portion 3a in a cross-sectional view. The workpiece 10 can be stably supported on the bottom surface 3c of the recess 3a. Thereby, the lower surface side of the workpiece 10 is not directly in contact with the bottom surface 3d of the second recess 3b, and it is possible to suppress an increase in variations in dimensions, strength, and the like due to heat treatment between the upper surface side and the lower surface side of the workpiece 10.

  1 shows an example in which the through hole 5 communicates with the first recess 3a, the through hole 5 may communicate with the second recess 3b.

  Further, in this case, since the through hole 5 communicates with the first recess 3a or the second recess 3b, the gas generated when the workpiece 10 is heat-treated can be easily discharged to the outside. Thereby, it is possible to further suppress the gas cooled in the temperature lowering stage of the heat treatment from becoming an impurity and adhering to the workpiece 10. In addition, the formation position of the through-hole 5 is illustrated below.

  FIG. 8 is a partial cross-sectional view showing an example of the formation position of the through hole of the work storage container of the present embodiment shown by the CC ′ line in FIG. 5 (a), (a) to (c). The workpiece is supported by the bottom surface of the first recess and the through hole is below the bottom surface of the first recess. (D) is the same as (a), but the workpiece is supported by the second hole. The example which is a bottom face of a recessed part is shown.

  The work storage container 1 shown in FIG. 1 is provided with a through hole 5 at a position closer to the opening than the bottom surface 3c of the first recess 3a, whereas in FIGS. 8 (a) to (d), The through hole 5 is provided on the bottom surface 3d side of the second recess 3b from the bottom surface 3c of the first recess 3a.

  8A to 8C, the work 10 is supported by the bottom surface 3c of the first recess 3a, and the through hole 5 connected to the outside of the plate-like body 2 is communicated with the recess 3b. Therefore, when the mass of the gas generated when the workpiece on the lower surface side of the workpiece 10 is heat-treated is large, the gas can be discharged to the outside more efficiently and on the bottom surface 3d side of the recess 3b. It can suppress staying. Thereby, it is possible to further suppress the gas cooled in the temperature lowering stage of the heat treatment from becoming an impurity and adhering to the workpiece 10.

  In particular, among the gases generated from the work 10, the gas that adheres to the work 10 often has a large mass, and the gas having a large mass tends to accumulate on the bottom surface 3 d side of the recess 3. Among them, it is more preferable that the workpiece 10 communicates with the bottom surface 3d side from the support position.

  On the other hand, when the mass of the gas generated from the workpiece 10 is small, it is preferable to provide the through hole 5 so as to communicate with the first recess 3a as shown in FIG. Is also preferably provided on the opening side.

As shown in FIG. 5, when there are lattice-like through holes 5 with respect to the plurality of recesses 3 as in the work storage container 12 of the present embodiment, the positions of the vertical and horizontal through holes 5 are as follows. Although the same may be sufficient, the through-hole 5 of one direction is formed in the 1st recessed part 3a which becomes an opening part side from the workpiece | work 10 shown in FIG.1 (c), and the other through-hole 5 is shown in FIG.7 (a)-(c). 2) which is on the bottom surface 3d side from the workpiece 10 shown in FIG.
More preferably, it is formed in the recess 3b. Thereby, the gas generated from the workpiece 10 during the heat treatment can be discharged smoothly, and the heat treatment of the upper surface and the lower surface of the workpiece 10 can be made more uniform.

  In the work storage container of the present embodiment, it is preferable that the plate-like body is made of ceramic and that the bottom surface of at least one of the first recess and the second recess is a burnt surface.

  9A is an enlarged cross-sectional view of a part D surrounded by a wavy line shown in FIG. 8B or an E part surrounded by a wavy line shown in FIG. (B) is a schematic diagram when the bottom surface of the first recess 3a or the bottom surface of the second recess 3b is viewed at a particle level in plan view.

  In the work storage containers 1, 11, and 12 of this embodiment, the plate-like body 2 is made of ceramic, and at least one of the bottom surfaces 3 c and 3 d of the first recess 3 a and the second recess 3 b is a burnt surface. 9B, as shown in FIG. 9B, when the surfaces of the bottom surfaces 3c and 3d supporting the workpiece 10 are viewed at the particle level, the ceramic particles 8 protrude randomly, and the workpiece 10 is supported by point contact. It becomes.

  Thereby, when the workpiece 10 is supported by the bottom surface 3c of the first recess 3a, the valley between the protruding ceramic particles 8 on the surface of the bottom surface 3c functions as a micro flow path 9a, and the workpiece 10 is heat treated. The gas generated at this time flows through the space on the upper surface side and the space on the lower surface side of the workpiece 10 accommodated in the recess 3, and can be discharged to the outside more efficiently through the through hole 5.

  Further, as shown in FIG. 8D, when the workpiece 10 is supported by the bottom surface 3d of the second recess 3b, the micro flow path 9a also exists between the bottom surface 3d that supports the workpiece 10. When the workpiece 10 is heat-treated, the gas generated on the second concave portion 3b side of the workpiece 10 can be released using the microchannel 9a, and is discharged to the outside more efficiently through the through hole 5. be able to.

  FIG. 10 is a perspective view showing another example of the work storage container according to the present embodiment, in which the concave portion 3 is provided on the one main surface 2a side of the plate-like body 2 provided with the concave portion 3 for storing the workpiece 10. Because the work storage container 13 of the present embodiment is used as a heat treatment container for the workpiece 10, for example, dust or the like present in the heat treatment atmosphere is directly applied to the work storage container 13 because the lid 22 for closing is provided. Adhering to the workpiece 10 can be suppressed, and the gas generated during the heat treatment can be discharged to the outside through the through-hole 5, so that the gas cooled at the temperature lowering stage of the heat treatment becomes an impurity and adheres to the workpiece 10. This can be further suppressed.

Up to this point, with respect to the through-hole 5, in the work storage containers 1, 11, and 12 of this embodiment, the concave portion 3 positioned on the outermost peripheral side of the plate-like body 2 and the outside of the plate-like body 2 are Although what penetrated was demonstrated, the groove | channel which connects the recessed part 3 and the exterior of the plate-shaped body 2 is provided in one main surface 2a of the plate-shaped body 2, and the one main surface 2a side of the plate-shaped body 2 is provided. By providing a lid 22 for closing the recess 3, the groove may serve as the role of the through hole 5.

  FIG. 11 is a cross-sectional view showing an example of the optical element storage container of the present embodiment.

  As shown in FIG. 11, the optical element storage container 21 of the present embodiment is formed using the work storage container 13 of the present embodiment, and the optical element 23 is stored in the recess 3. When the optical element storage container 21 of the present embodiment is used as a heat treatment container for the optical element 23, it is possible to prevent dust in the heat treatment atmosphere from directly adhering to the optical element 22, and gas generated from the optical element 23 is generated. Adhesion to the surface of the optical element 22 can be suppressed, and the optical element 23 can be uniformly heat-treated.

  When the optical element 23 is a glass lens, it is also useful as a container for heat treatment for adjusting the refractive index and heat treatment after resin coating.

1, 11, 12, 13: Work storage container 2: Plate-like body 2a: One main surface, 2b: Main surface on the opposite side, 2c: Side end surface, 2d: Sheet 3: Recess 3a: First recess 3b: second recess, 3c: bottom surface of the first recess, 3d: bottom surface of the second recess, 3f: recess located on the outer periphery side, 3g: recesses other than the recess located on the outer periphery side, 3h: inner surface 4: convex part 5: through-hole 8: ceramic particle 9a: microchannel
10: Work
21: Optical element storage container
22: Lid
23: Optical element

Claims (9)

  A workpiece comprising a plate-like body having a recess for storing a workpiece, wherein the recess located on the outermost peripheral side of the plate-like body and the outside of the plate-like body are connected by a through hole. Container for storage.   The work storage container according to claim 1, wherein a plurality of the recesses are provided and the recesses communicate with each other through a through hole.   The workpiece storage container according to claim 1, wherein a convex portion is provided on a bottom surface side of the inner side surface of the concave portion.   The said plate-shaped body consists of ceramics, The container for workpiece | work storage in any one of Claim 1 thru | or 3 characterized by the above-mentioned.   The work storage container according to claim 4, wherein the plate-like body is a laminated body.   The concave portion has a first concave portion that opens on one main surface of the plate-like body, and a second concave portion that is connected to the first concave portion and that is narrower than the first concave portion in a sectional view. The work storage container according to claim 1, wherein the through hole communicates with the first recess or the second recess.   The work storage container according to claim 6 or 7, wherein a bottom surface of at least one of the first recess and the second recess is a burnt surface.   The work storage container according to claim 1, further comprising a lid for closing the recess.   An optical element storage container comprising the work storage container according to claim 8, wherein an optical element is stored in the recess.