JP7345311B2 - ceramic shelves - Google Patents

Description

The present invention relates to a ceramic shelf assembly.

Generally, a ceramic shelf assembly is known as a kiln tool used when firing an object made of ceramic material in a firing furnace. The ceramic shelf assembly includes a plurality of columns, and each column is provided with a mounting table (for example, see Patent Document 1). A shelf board is placed on the mounting table. The object to be fired is placed on the shelf board and fired in this state in the firing furnace.

Japanese Patent Application Publication No. 2011-052909

Ceramic shelf assemblies are required to have strength so that they will not be distorted or damaged in the high-temperature environment during firing of the fired objects. For this reason, the ceramic shelf assembly is made of a ceramic material that is a high-temperature refractory material. However, the structure of the ceramic shelf assembly is also desired to have a structure that can ensure strength at high temperatures.

The present invention has been made in consideration of these points, and an object of the present invention is to provide a ceramic shelf assembly that can improve strength in a high-temperature environment during firing.

The present invention
A ceramic shelf assembly for supporting a supported object in a firing furnace,
an upper support frame extending laterally;
a plurality of columns extending in the vertical direction and supporting the upper support frame from below;
The upper support frame includes a first upper support rod, a second upper support rod that receives a load from the first upper support rod, and an upper connection portion that connects the first upper support rod and the second upper support rod. and,
The upper connecting portion includes a first upper support end surface formed such that an end of the first upper support rod on the side of the second upper support rod is cut out from below, and a first upper support end surface of the second upper support rod that is formed such that an end on the side of the second upper support rod is cut out from below. a second upper support end face formed such that the end on the side of the first upper support rod is cut out from above;
a ceramic shelf assembly, wherein the first upper support end surface is in contact with the second upper support end surface;
I will provide a.

According to the present invention, strength can be improved in a high temperature environment during firing.

FIG. 1 is a front view showing an example of a ceramic shelf assembly according to an embodiment of the present invention. FIG. 2 is a perspective view showing the ceramic shelf assembly of FIG. 1. FIG. 3 is a longitudinal cross-sectional view taken along line AA in FIG. FIG. 4 is an enlarged sectional view showing the upper connecting portion of FIG. 3. FIG. FIG. 5 is an enlarged sectional view of the upper connecting portion of FIG. 4 viewed from the left side of FIG. 3. FIG. 6 is an enlarged cross-sectional view of the strut of FIG. 3. FIG. 7 is an enlarged sectional view showing the lower connecting portion of FIG. 3. FIG. FIG. 8 is an enlarged sectional view of the lower connecting portion of FIG. 7 viewed from the left side of FIG. 3. FIG. 9 is a top view of the upper support frame of FIG. 1. FIG. 10 is a top view of the lower support frame of FIG. 1.

Hereinafter, a ceramic shelf assembly according to an embodiment of the present invention will be described with reference to the drawings. A ceramic shelf assembly is a kiln tool for supporting objects in a firing furnace. Examples of the object to be supported include the object to be fired, a shelf board on which the object to be fired is placed, a baking jig for correcting the shape of the object to be fired, and the like.

As shown in FIGS. 1 and 2, the ceramic shelf assembly 1 according to the present embodiment includes an upper support frame 10, a plurality of columns 30 extending in the vertical direction and supporting the upper support frame 10 from below, and a plurality of columns 30. A lower support frame 40 that supports 30 from below is provided. FIG. 1 shows an example in which a supported object 101 is supported on the upper part of a ceramic shelf assembly 1 in a firing furnace 100.

First, the support column 30 will be explained. As shown in FIGS. 2 and 3, the support column 30 is formed in a cylindrical shape so as to extend linearly in the vertical direction, and may have a ring-shaped cross section. Thereby, the mass of the support column 30 can be reduced, and the heat capacity of the ceramic shelf assembly 1 can be reduced. As shown in FIG. 3, the strut 30 includes a strut main body 30a, a strut upper end fitting portion 30b provided at the upper end of the strut main body 30a, and a strut upper end fitting portion 30b provided at the lower end of the strut main body 30a. The supporting column lower end fitting portion 30c may also be included. The diameter of the strut upper end fitting portion 30b and the diameter of the strut lower end fitting portion 30c are smaller than the diameter of the strut main body portion 30a. The diameter of the strut upper end fitting portion 30b and the diameter of the strut lower end fitting portion 30c may be the same. The pillar 30 is formed by firing a ceramic material, and the pillar upper end fitting part 30b and the pillar lower end fitting part 30c may be formed by machining after firing.

Next, the upper support frame 10 will be explained.

As shown in FIG. 2, the upper support frame 10 includes a first upper support rod 11, a second upper support rod 12 that receives a load from the first upper support rod 11, a first upper support rod 11 and a second upper support rod. The upper connecting portion 13 is connected to the rod 12. The first upper support rod 11 and the second upper support rod 12 each extend laterally. For this reason, the upper support frame 10 is also formed to extend laterally and along a horizontal plane.

In this embodiment, the upper support frame 10 includes two first upper support rods 11 , two second upper support rods 12 , and four upper connection parts 13 . When viewed from above, the two first upper support rods 11 are opposite to each other, and the two second upper support rods 12 are opposite to each other, and the first upper support rod 11 and the second upper support rod 12 are extend in directions perpendicular to each other. Each of the first upper support rods 11 and the corresponding second upper support rods 12 are connected by an upper connecting portion 13. That is, the first upper support rod 11 is connected to both ends of the second upper support rod 12 via the corresponding upper connection portions 13, respectively. Further, a second upper support rod 12 is connected to both ends of the first upper support rod 11 via corresponding upper connection portions 13 . Each of the upper connecting parts 13 connects the corresponding first upper support rod 11 and the corresponding second upper support rod 12. Thus, in this embodiment, the upper support frame 10 is formed in a rectangular shape when viewed from above, and the ceramic shelf assembly 1 is formed in a rectangular parallelepiped shape. The above-described supported object 101 is placed, for example, on two first upper support rods 11 of the upper support frame 10, and the load from the supported object 101 is received by the two first upper support rods 11. It has become.

As shown in FIG. 3, the first upper support rod 11 is provided at both ends of the first upper support rod main body 11a in the longitudinal direction of the first upper support rod 11. The first upper support rod end portion 11b is included. The first upper support rod end portion 11b is a portion where a first upper support end surface 14, which will be described later, is provided. Note that the longitudinal direction of the first upper support rod 11 corresponds to the direction along the outer edge of the ceramic shelf assembly 1 when viewed from above. In FIG. 1, the direction perpendicular to the paper surface corresponds to the longitudinal direction of the first upper support rod 11, and in FIG. 3, the left-right direction corresponds to the longitudinal direction of the first upper support rod 11.

As shown in FIG. 1, the second upper support rod 12 is provided at both ends of the second upper support rod main body 12a in the longitudinal direction of the second upper support rod 12a. and a second upper support rod end 12b. The second upper support rod end portion 12b is a portion where a second upper support end surface 15, which will be described later, is provided. Note that the longitudinal direction of the second upper support rod 12 corresponds to the direction along the outer edge of the ceramic shelf assembly 1 when viewed from above. In FIG. 1, the left-right direction corresponds to the longitudinal direction of the second upper support rod 12, and in FIG. 3, the direction perpendicular to the paper surface corresponds to the longitudinal direction of the second upper support rod 12.

As shown in FIGS. 3 to 5, the upper connecting portion 13 that connects the first upper support rod 11 and the second upper support rod 12 is connected to the first upper support end surface 14 provided on the first upper support rod 11. , a second upper support end surface 15 provided on the second upper support rod 12, a first upper through hole 18, a second upper through hole 19, and an upper locking rod portion 20. Among these, the first upper through hole 18 is a hole that is provided in the first upper support end surface 14 and passes through the first upper support rod end 11b of the first upper support rod 11. The second upper through hole 19 is a hole that is provided in the second upper support end surface 15 and passes through the second upper support rod end 12 b of the second upper support rod 12 . The upper locking rod portion 20 is inserted into the first upper through hole 18 and the second upper through hole 19 to lock the first upper support rod 11 and the second upper support rod 12.

As shown in FIG. 4, the first upper support end surface 14 is formed such that the end of the first upper support rod 11 on the second upper support rod 12 side is cut out from below. That is, each of the first upper support rod ends 11b of the first upper support rod 11 is provided with a first upper support end surface 14 facing downward. The first upper wall 16 may extend downward from the edge of the first upper support end surface 14 on the side of the first upper support rod main body portion 11a. That is, the first upper support end surface 14 extends in the lateral direction, and the first upper wall 16 extends in the vertical direction and may be perpendicular to the first upper support end surface 14. However, the first upper wall 16 does not have to extend in the vertical direction. That is, if the first upper support rod 11 constituting the second door section 72 (described later) is rotatable and the first upper support end surface 14 and the second upper support end surface 15 are able to abut, then the first The upper wall 16 does not have to be perpendicular to the first upper support end surface 14.

The first upper support rod 11 may have a rectangular cross section (a cross section perpendicular to the longitudinal direction). The thickness (height dimension between the upper surface and the lower surface) of the first upper support rod main body portion 11a of the first upper support rod 11 may be constant in the longitudinal direction. The thickness of the first upper support rod end portion 11b (height dimension between the upper surface and the first upper support end surface 14) may be approximately half the thickness of the first upper support rod main body portion 11a.

As shown in FIG. 5, the second upper support end surface 15 is formed such that the end of the second upper support rod 12 on the side of the first upper support rod 11 is cut out from above. That is, each of the second upper support rod ends 12b of the second upper support rod 12 is provided with a second upper support end surface 15 facing upward. The second upper wall 17 may extend upward from the edge of the second upper support end surface 15 on the side of the second upper support rod main body portion 12a. That is, the second upper support end surface 15 extends in the lateral direction, and the second upper wall 17 extends in the vertical direction, and may be perpendicular to the second upper support end surface 15. However, the second upper wall 17 does not have to extend in the vertical direction. That is, if the second upper support rod 12 constituting the first door portion 71 (described later) is rotatable, and the first upper support end surface 14 and the second upper support end surface 15 are able to come into contact with each other, the second upper support rod 12 The upper wall 17 does not have to be perpendicular to the second upper support end surface 15.

The second upper support rod 12 may have a rectangular cross section. The thickness (height dimension between the upper surface and the lower surface) of the second upper support rod main body portion 12a of the second upper support rod 12 may be constant in the longitudinal direction. The thickness of the second upper support rod end portion 12b (height dimension between the lower surface and the second upper support end surface 15) may be approximately half the thickness of the second upper support rod main body portion 12a.

As shown in FIGS. 4 and 5, the thickness of the first upper support rod body portion 11a of the first upper support rod 11 and the thickness of the second support rod body portion of the second upper support rod 12 may be equal. . The thickness of the first upper support rod end 11b and the thickness of the second upper support rod end 12b may be equal. Further, as shown in FIG. 2, the length in the longitudinal direction of the first upper support rod 11 may be longer than or equal to the length in the longitudinal direction of the second upper support rod 12.

The first upper support rod 11 and the second upper support rod 12 may be arranged at the same height position. More specifically, the upper surface of the first upper support rod 11 and the upper surface of the second upper support rod 12 may be arranged at the same height position. In this case, formation of a step between the upper surface of the first upper support rod 11 and the upper surface of the second upper support rod 12 can be suppressed.

The first upper support end surface 14 is in contact with the second upper support end surface 15 . The first upper support rod end 11b and the second upper support rod end 12b overlap. The thickness of this overlapping portion (height dimension between the upper surface of the first upper support rod 11 and the lower surface of the second upper support rod 12) may be equal to the thickness of the first upper support rod main body portion 11a, The thickness may be equal to the thickness of the second upper support rod main body portion 12a. That is, the upper support frame 10 may be formed with a constant thickness throughout.

As shown in FIGS. 4 and 5, the first upper through hole 18 provided in the first upper support end surface 14 extends vertically and passes through the first upper support rod end 11b of the first upper support rod 11. are doing. Further, the first upper through hole 18 is formed in a cylindrical shape. Similarly, the second upper through hole 19 provided in the second upper support end surface 15 extends vertically and passes through the second upper support rod end 12b of the second upper support rod 12. Further, the second upper through hole 19 is formed in a cylindrical shape. The diameter of the first upper through hole 18 and the diameter of the second upper through hole 19 may be equal. The first upper through hole 18 and the second upper through hole 19 overlap when viewed from above when the first upper support rod 11 and the second upper support rod 12 are connected.

The upper locking rod portion 20 is inserted and fitted into the first upper through hole 18 and the second upper through hole 19 described above. As a result, the first upper support rod 11 and the corresponding second upper support rod 12 are locked by the upper locking rod portion 20. In this embodiment, the upper locking rod portion 20 is integrated with a lower locking rod portion 50, which will be described later, to form a continuous locking rod 60. Details of the locking rod 60 will be described later.

As shown in FIGS. 3 and 6, the first upper support rod 11 and the second upper support rod 12 may each have an upper recess 21 that opens downward. The upper recess 21 may be provided in the first upper support rod main body 11a and the second upper support rod main body 12a. In this embodiment, two upper recesses 21 are provided in the first upper support rod main body 11a, and one upper recess 21 is provided in the second upper support rod main body 12a. In this embodiment, the first upper support rod end 11b is not provided with the upper recess 21, and the second upper support rod end 12b is not provided with the upper recess 21.

The upper recess 21 is formed in a cylindrical shape, and is configured such that the column upper end fitting portion 30b of the column 30 described above is inserted and fitted therein. As shown in FIG. 6, the upper recess 21 may include an upper recess contact surface 21a that can come into contact with the upper end surface 30d of the support 30 on the side of the support upper end fitting portion 30b. The first upper support rod 11 and the second upper support rod 12 are supported by the support column 30 by the upper end surface 30d of the support column 30 coming into contact with the upper recess contact surface 21a.

An upper communication hole 22 may be provided that communicates each upper recess 21 upward. The upper communication hole 22 extends from the upper recess contact surface 21a to the upper surface of the upper support rods 11 and 12, and is open upward. By providing such an upper communication hole 22, it is possible to prevent the upper recess 21 from becoming a closed space. The upper communication hole 22 is formed in a cylindrical shape, and may be formed concentrically with the corresponding upper recess 21. The diameter of the upper communication hole 22 is smaller than the diameter of the upper recess 21, and the above-described upper recess contact surface 21a may be formed in a ring shape when viewed from below.

The upper support rods 11 and 12 are formed by firing a ceramic material. The above-described upper support end surfaces 14 and 15, upper walls 16 and 17, upper through holes 18 and 19, upper recess 21 and upper communication hole 22 may be formed by machining after firing.

Next, the lower support frame 40 will be explained.

As shown in FIG. 2, the lower support frame 40 includes a first lower support rod 41, a second lower support rod 42 that receives a load from the first lower support rod 41, a first lower support rod 41 and a second lower support rod. It has a lower connecting part 43 connected to the rod 42. The first lower support rods 41 are arranged below the corresponding first upper support rods 11 and overlap with the first upper support rods 11 when viewed from above. The second lower support rod 42 is arranged below the corresponding second upper support rod 12 and overlaps with the second upper support rod 12 when viewed from above. The first lower support rod 41 and the second lower support rod 42 each extend in the lateral direction. Therefore, the lower support frame 40 is also formed to extend in the lateral direction, and is formed along the horizontal plane.

In this embodiment, the lower support frame 40 includes two first lower support rods 41, two second lower support rods 42, and four lower connecting portions 43. When viewed from above, the two first lower support rods 41 face each other, the two second lower support rods 42 face each other, and the first lower support rod 41 and the second lower support rod 42 extend in directions perpendicular to each other. Each of the first lower support rods 41 and the corresponding second lower support rods 42 are connected by a lower connecting portion 43. That is, each of the lower connecting parts 43 connects the corresponding first lower support rod 41 and the corresponding second lower support rod 42. Thus, in this embodiment, the lower support frame 40 is formed into a rectangular shape like the upper support frame 10 when viewed from above.

As shown in FIG. 3, the first lower support rod 41 is provided at both ends of the first lower support rod main body 41a in the longitudinal direction of the first lower support rod 41. A first lower support rod end portion 41b. The first lower support rod end portion 41b is a portion where a first lower support end surface 44, which will be described later, is provided. Note that the longitudinal direction of the first lower support rod 41 corresponds to the direction along the outer edge of the ceramic shelf assembly 1 when viewed from above. Similar to the longitudinal direction of the first upper support rod 11 described above, in FIG. 1, the direction perpendicular to the page corresponds to the longitudinal direction of the first lower support rod 41, and in FIG. Corresponds to the longitudinal direction.

As shown in FIG. 1, the second lower support rod 42 is provided at both ends of the second lower support rod main body 42a in the longitudinal direction of the second lower support rod 42a. A second lower support rod end portion 42b is included. The second lower support rod end portion 42b is a portion where a second lower support end surface 45, which will be described later, is provided. Note that the longitudinal direction of the second lower support rod 42 corresponds to the direction along the outer edge of the ceramic shelf assembly 1 when viewed from above. Similar to the longitudinal direction of the second upper support rod 12 described above, the left-right direction in FIG. 1 corresponds to the longitudinal direction of the second lower support rod 42, and in FIG. Corresponds to the longitudinal direction.

As shown in FIGS. 3, 7, and 8, the lower connecting portion 43 that connects the first lower support rod 41 and the second lower support rod 42 is a It has an end surface 44, a second lower support end surface 45 provided on the second lower support rod 42, a first lower through hole 48, a second lower through hole 49, and a lower locking rod portion 50. . Among these, the first lower through hole 48 is a hole that is provided in the first lower support end surface 44 and passes through the first lower support rod end 41b of the first lower support rod 41. The second lower through hole 49 is a hole that is provided in the second lower support end surface 45 and passes through the second lower support rod end 42 b of the second lower support rod 42 . The lower locking rod portion 50 is inserted into the first lower through hole 48 and the second lower through hole 49 to lock the first upper support rod 11 and the second upper support rod 12.

As shown in FIG. 7, the first lower support end surface 44 is formed such that the end of the first lower support rod 41 on the second lower support rod 42 side is cut out from above. That is, each of the first lower support rod ends 41b of the first lower support rod 41 is provided with a first lower support end surface 44 facing upward. The first lower wall 46 may extend upward from the edge of the first lower support end surface 44 on the side of the first lower support rod main body portion 41a. That is, the first lower support end surface 44 extends in the lateral direction, and the first lower wall 46 extends in the vertical direction, and may be perpendicular to the first lower support end surface 44 . However, the first lower wall 46 does not have to extend in the vertical direction. That is, if the first lower support rod 41 constituting the second door portion 72 (described later) is rotatable and the first lower support end surface 44 and the second lower support end surface 45 can abut, then the first The lower wall 46 does not have to be perpendicular to the first lower support end surface 44 .

The first lower support rod 41 may have a rectangular cross section (a cross section perpendicular to the longitudinal direction). The thickness (height dimension between the upper surface and the lower surface) of the first lower support rod main body portion 41a of the first lower support rod 41 may be constant in the longitudinal direction. The thickness of the first lower support rod end portion 41b (height dimension between the lower surface and the first lower support end surface 44) may be approximately half the thickness of the first lower support rod main body portion 41a.

As shown in FIG. 8, the second lower support end surface 45 is formed such that the end of the second lower support rod 42 on the first lower support rod 41 side is cut out from below. That is, each of the second lower support rod ends 42b of the second lower support rod 42 is provided with a second lower support end surface 45 facing downward. A second lower wall 47 extends downward from the edge of the second lower support end surface 45 on the second lower support rod main body portion 42a side. That is, the second lower support end surface 45 extends in the horizontal direction, and the second lower wall 47 extends in the vertical direction, and may be perpendicular to the second lower support end surface 45. However, the second lower wall 47 does not have to extend in the vertical direction. That is, if the second lower support rod 42 constituting the first door section 71 (described later) is rotatable and the first lower support end surface 44 and the second lower support end surface 45 are able to abut, then the second The lower wall 47 does not need to be perpendicular to the second lower support end surface 45.

The second lower support rod 42 may have a rectangular cross section. The thickness (height dimension between the upper surface and the lower surface) of the second lower support rod main body portion 42a of the second lower support rod 42 may be constant in the longitudinal direction. The thickness of the second lower support rod end portion 42b (height dimension between the upper surface and the second lower support end surface 45) may be approximately half the thickness of the second lower support rod main body portion 42a.

As shown in FIGS. 7 and 8, the thickness of the first lower support rod body portion 41a of the first lower support rod 41 and the thickness of the second lower support rod body portion 42a of the second lower support rod 42 are equal. Good too. The thickness of the first lower support rod end 41b and the second lower support rod end 42b may be equal. Further, as shown in FIG. 2, the length of the first lower support rod 41 in the longitudinal direction may be longer than or equal to the length of the second lower support rod 42 in the longitudinal direction.

The first lower support rod 41 and the second lower support rod 42 may be arranged at the same height position. More specifically, the lower surface of the first lower support rod 41 and the lower surface of the second lower support rod 42 may be arranged at the same height position. In this case, formation of a step between the lower surface of the first lower support rod 41 and the lower surface of the second lower support rod 42 can be suppressed.

The first lower support end surface 44 is in contact with the second lower support end surface 45 . The first lower support rod end 41b and the second lower support rod end 42b overlap. The thickness of this overlapping portion (height dimension between the lower surface of the first lower support rod 41 and the upper surface of the second upper support rod 12) may be equal to the thickness of the first lower support rod main body portion 41a, The thickness may be equal to the thickness of the second lower support rod main body portion 42a. That is, the lower support frame 40 may be formed with a constant thickness as a whole.

As shown in FIGS. 7 and 8, the first lower through hole 48 provided in the first lower support end surface 44 extends vertically and penetrates the first lower support rod end 41b of the first lower support rod 41. are doing. Further, the first lower through hole 48 is formed in a cylindrical shape. Similarly, the second lower through hole 49 provided in the second lower support end surface 45 extends vertically and passes through the second lower support rod end 42b of the second lower support rod 42. Further, the second lower through hole 49 is formed in a cylindrical shape. The diameter of the first lower through hole 48 and the diameter of the second lower through hole 49 may be equal. The first lower through hole 48 and the second lower through hole 49 overlap when viewed from above when the first lower support rod 41 and the second lower support rod 42 are connected. Further, the diameter of the first lower through hole 48 and the diameter of the second lower through hole 49 may be smaller than the diameter of the first upper through hole 18 described above, and may be smaller than the diameter of the second upper through hole 19. Good too. However, the invention is not limited to this, and when the diameter of the locking rod upper end fitting portion 60b and the diameter of the locking rod lower end fitting portion 60c of the locking rod 60 are the same, as described later, the first The diameter of the lower through hole 48 and the diameter of the second lower through hole 49 may be the same as the diameter of the first upper through hole 18 described above, or may be the same as the diameter of the second upper through hole 19. .

The lower locking rod portion 50 is inserted and fitted into the first lower through hole 48 and the second lower through hole 49 described above. As a result, the first lower support rod 41 and the corresponding second lower support rod 42 are locked by the lower locking rod portion 50. In this embodiment, the lower locking rod portion 50 is integrated with the above-described upper locking rod portion 20 to form a continuous locking rod 60. Details of the locking rod 60 will be described later.

As shown in FIGS. 3 and 6, the first lower support rod 41 and the second lower support rod 42 may each have a lower recess 51 that opens upward. The lower recess 51 may be provided in the first lower support rod main body 41a and the second lower support rod main body 42a. In this embodiment, two lower recesses 51 are provided in the first lower support rod main body 41a, and one lower recess 51 is provided in the second lower support rod main body 42a. In this embodiment, the lower recess 51 is not provided in the first lower support rod end 41b, and the lower recess 51 is not provided in the second lower support rod end 42b.

The lower recess 51 is formed in a cylindrical shape, and is configured such that the column lower end fitting portion 30c of the column 30 described above is inserted and fitted therein. As shown in FIG. 6, the lower recess 51 may include a lower recess contact surface 51a that can come into contact with the lower end surface 30e of the support 30 on the side of the support lower end fitting portion 30c. The first lower support rod 41 and the second lower support rod 42 are supported by the support column 30 by the lower end surface 30e of the support column 30 coming into contact with the lower recess contact surface 51a.

A lower communication hole 52 may be provided that communicates each lower recess 51 downward. The lower communication hole 52 extends from the lower recess contact surface 51a to the lower surfaces of the lower support rods 41 and 42, and is open downward. By providing such a lower communication hole 52, it is possible to prevent the lower recess 51 from becoming a closed space. The lower communication hole 52 is formed in a cylindrical shape, and may be formed concentrically with the corresponding lower recess 51. The diameter of the lower communicating hole 52 is smaller than the diameter of the lower recess 51, and the lower recess abutting surface 51a described above is formed in a ring shape when viewed from above. Further, the diameter of the lower recess 51 may be equal to the diameter of the upper recess 21 described above. The diameter of the lower communicating hole 52 may be equal to the diameter of the upper communicating hole 22 described above.

The first lower support rod 41 and the second lower support rod 42 are formed by firing a ceramic material. The lower support end surfaces 44, 45, lower walls 46, 47, lower through holes 48, 49, lower recess 51, and lower communication hole 52 described above may be formed by machining after firing.

Next, the locking rod 60 will be explained.

In this embodiment, as shown in FIG. 3, the above-described upper locking rod portion 20 and the corresponding lower locking rod portion 50 are integrated with each other to form one continuous locking rod 60. There is. The ceramic shelf assembly 1 in this embodiment has four locking rods 60, and each locking rod 60 locks the corresponding first upper support rod 11 and second upper support rod 12. At the same time, the corresponding first lower support rod 41 and second lower support rod 42 are locked. More specifically, the locking rod 60 is inserted into and fitted into the first upper through hole 18 and the second upper through hole 19, and is inserted into the first lower through hole 48 and the second lower through hole 49. It is inserted and mated. Note that if the strength of the ceramic shelf assembly 1 can be ensured by fitting the above-mentioned pillars 30 into the upper recess 21 and the lower recess 51, the locking rod 60 will fit into each of the through holes 18 and 19. , 48, 49 may be relatively loosely fitted.

The locking rod 60 is formed in a cylindrical shape so as to extend linearly in the vertical direction, and may have a ring-shaped cross section. Thereby, the mass of the locking rod 60 can be reduced, and the heat capacity of the ceramic shelf assembly 1 can be reduced. As shown in FIGS. 4, 5, 7, and 8, the locking rod 60 includes a locking rod main body 60a and an upper end fitting of the locking rod provided at the upper end of the locking rod main body 60a. It includes a mating portion 60b and a locking rod lower end fitting portion 60c provided at the lower end of the locking rod main body portion 60a. The locking rod upper end fitting portion 60b is a portion corresponding to the upper locking rod portion 20, and is inserted into and fitted into the first upper through hole 18 and the second upper through hole 19. The locking rod lower end fitting portion 60c is a portion corresponding to the lower locking rod portion 50, and is inserted into and fitted into the first lower through hole 48 and the second lower through hole 49. The diameter of the locking rod upper end fitting portion 60b may be larger than the diameter of the locking rod main body portion 60a. The diameter of the locking rod lower end fitting portion 60c may be smaller than the diameter of the locking rod main body portion 60a. In this way, each locking rod 60 can be pulled upward from the first upper through hole 18 and the second upper through hole 19 as well as the first lower through hole 48 and the second lower through hole 49. The locking rod 60 is formed by firing a ceramic material, and the locking rod upper end fitting part 60b and the locking rod lower end fitting part 60c are formed by machining after firing. Good too. Note that the locking rod upper end fitting portion 60b may be cast so that the diameter before machining is larger than the diameter after machining. Further, the diameter of the locking rod upper end fitting portion 60b and the diameter of the locking rod lower end fitting portion 60c may be the same as the diameter of the locking rod main body portion 60a. In this case, the locking rod 60 may be formed by being entirely machined after firing.

The lower end surface 60e of the locking rod 60 is in contact with the floor surface 100a of the firing furnace 100 due to its own weight. This prevents the locking rod 60 from being removed from the first upper through hole 18 and the second upper through hole 19 as well as the first lower through hole 48 and the second lower through hole 49.

The upper end surface of the locking rod 60 may be arranged at the same height as 60d, the upper surface of the upper support rods 11 and 12, or it may be arranged at a lower position than the upper surface of the upper support rods 11 and 12. good. The length of the locking rod 60 in the axial direction (vertical direction) may be approximately the same as the height of the ceramic shelf assembly 1.

Examples of ceramic materials used for the upper support rods 11 and 12, the columns 30, the lower support rods 41 and 41, and the locking rod 60 include alumina, mullite, zirconia, silicon carbide, silicon nitride, aluminum nitride, cordierite, and the like. Can be mentioned. The upper support rods 11 and 12, the struts 30, the lower support rods 41 and 42, and the locking rod 60 are obtained by kneading fine powder of a ceramic material with a binder, shaping the mixture, and then firing it in the firing furnace 100. The fired upper support bars 11, 12, struts 30, lower support bars 41, 42 and locking rods 60 are at least partially machined. The ceramic materials used for the upper support rods 11 and 12, the struts 30, the lower support rods 41 and 42, and the locking rod 60 may be the same.

The upper support rods 11 and 12 and the support column 30 may be bonded together using an adhesive (for example, cement material). Similarly, the lower support rods 41 and 42 and the support column 30 may also be bonded with adhesive. By using the adhesive in this way, the strength of the ceramic shelf set 1 can be improved.

By the way, the ceramic shelf assembly 1 in this embodiment has a door opening/closing type structure. This will be explained using FIG. 2.

As shown in FIG. 2, one second upper support rod 12 and the corresponding second lower support rod 42 (disposed below the second upper support rod 12) are connected by a support 30. , the second upper support rod 12, the second lower support rod 42, and the corresponding support 30 (in the form shown in FIG. 2, one support 30) constitute the first door portion 71. Further, one first upper support rod 11 and the corresponding first lower support rod 41 (disposed below the first upper support rod 11) are connected by a support 30, and these first upper support rods 11 The first fixing portion 81 is constituted by the upper support rod 11, the first lower support rod 41, and the corresponding struts 30 (two struts 30 in the form shown in FIG. 2).

Further, the other first upper support rod 11 and the corresponding first lower support rod 41 (disposed below the first upper support rod 11) are connected by a support 30, and these first upper support rods 11 The second door portion 72 is constituted by the upper support rod 11, the first lower support rod 41, and the corresponding columns 30 (two columns 30 in the form shown in FIG. 2). The first upper support rod 11 and the second upper support rod 12 that constitute the second door section 72 are different from the first upper support rod 11 and the second upper support rod 12 that constitute the first fixing section 81. Further, the other second upper support rod 12 and the corresponding second lower support rod 42 (disposed below the second upper support rod 12) are connected by a support 30, and these second upper support rods 12 The upper support rod 12, the second lower support rod 42, and the corresponding strut 30 (one strut 30 in the form shown in FIG. 2) constitute the second fixing portion 82. The second upper support rod 12 and the second lower support rod 42 that constitute the second fixing section 82 are different from the second upper support rod 12 and the second lower support rod 42 that constitute the first door section 71.

The first door portion 71 is rotatable relative to the first fixing portion 81. The first door portion 71 is rotatable around a locking rod 60 that locks the first door portion 71 and the first fixing portion 81 together. The locking rod 60 locks the first upper support rod 11 that constitutes the first fixing portion 81 as the upper locking rod portion 20 and the second upper support rod 12 that constitutes the first door portion 71, and The lower locking rod portion 50 is a rod that locks the first lower support rod 41 that constitutes the first fixing portion 81 and the second lower support rod 42 that constitutes the first door portion 71. In this way, the first upper support rod 11 constituting the first fixing section 81 is connected to the end of the second upper support rod 12 constituting the first door section 71 on the first fixing section 81 side. The second upper support rod 12 is connected to the first upper support rod 11 through a portion 13 so that the second upper support rod 12 is rotatable with respect to the first upper support rod 11 . Similarly, the first lower support rod 41 constituting the first fixing portion 81 is attached to the lower connecting portion 43 at the end of the second lower support rod 42 constituting the first door portion 71 on the first fixing portion 81 side. The second lower support rod 42 is rotatable with respect to the first lower support rod 41.

By pulling the locking rod 60 that locks the first door part 71 and the second door part 72 upward from the first door part 71 and the second door part 72, the first door part 71 is rotated. It is now possible. As shown in FIGS. 9 and 10, the first door section 71 can rotate outward from the closed state in which the first door section 71 and the second door section 72 are locked. The locking rod 60 is connected to the first upper support rod 11 (different from the first upper support rod 11 that configures the first fixing section 81) that constitutes the second door part 72 as the upper locking rod portion 20. The second upper support rod 12 constituting the door portion 71 is locked, and the second door portion 72 is configured as the lower locking rod portion 50 (the first lower support rod 41 forming the first fixing portion 81 and is a rod that locks the nine different first lower support rods 41 and the second lower support rod 42 that constitutes the first door portion 71.

In the closed state, as shown in FIG. The wall 17 is in contact with a side surface of the first upper support rod 11 that constitutes the first fixing portion 81 . Further, the first upper wall 16 formed on the first upper support rod end portion 11b on the first door portion 71 side of the first upper support rod 11 constituting the first fixing portion 81 The second upper support rod 12 is in contact with the side surface of the second upper support rod 12 . In this way, the first upper wall 16 and the second upper wall 17 function as a stopper that prevents the first door portion 71 from rotating inward.

Similarly, in the closed state, as shown in FIG. The second lower wall 47 formed in is in contact with the side surface of the first lower support rod 41 that constitutes the first fixing portion 81 . Further, the first lower wall 46 formed on the first lower support rod end 41b on the first door portion 71 side of the first lower support rod 41 constituting the first fixing portion 81 The second lower support rod 42 is in contact with the side surface of the second lower support rod 42 . In this way, the first lower wall 46 and the second lower wall 47 function as stoppers that prevent the first door portion 71 from rotating inward.

As shown in FIG. 9, the first upper support rod end portion 11b of the first upper support rod 11 constituting the first fixing portion 81 on the first door portion 71 side has an R-shaped outline when viewed from above. have. The outline of this R-shape is an R-shape centered on the rotation fulcrum of the first door portion 71 (the center of the locking rod 60). Further, the second upper support rod end portion 12b of the second upper support rod 12 constituting the first door portion 71 on the first fixing portion 81 side has a similar R-shaped outline. As shown in FIG. 10, the first lower support rod end 41b on the first door portion 71 side of the first lower support rod 41 constituting the first fixing portion 81 has a similar R-shaped outline. There is. Further, the second lower support rod end portion 42b of the second lower support rod 42 constituting the first door portion 71 on the first fixing portion 81 side has a similar R-shaped outline. The contours of the R shape may all be formed in a semicircular shape, and may have the same radius. The radius of the R-shaped profile may be approximately half the width (dimension in the direction perpendicular to the longitudinal direction) of each of the support rods 11, 12, 41, and 42 when viewed from above.

The second door portion 72 is rotatable relative to the second fixing portion 82. The second door portion 72 is rotatable around a locking rod 60 that locks the second door portion 72 and the second fixing portion 82 together. The locking rod 60 locks the second upper support rod 12 that constitutes the second fixing portion 82 as the upper locking rod portion 20 and the first upper support rod 11 that constitutes the second door portion 72, and The lower locking rod portion 50 is a rod that locks the second lower support rod 42 that constitutes the second fixing section 82 and the first lower support rod 41 that constitutes the second door section 72 . In this way, the second upper support rod that constitutes the second fixing part 82 is attached to the end of the first upper support rod 11 that constitutes the second door part 72 on the opposite side to the first door part 71 side. 12 are connected via an upper connecting portion 13, and the first upper support rod 11 is rotatable with respect to the second upper support rod 12. Similarly, at the end of the first lower support rod 41 that constitutes the second door section 72 on the side opposite to the first door section 71, the second lower support rod 42 that constitutes the second fixing section 82 is attached. The first lower support rod 41 is connected to the second lower support rod 42 via a lower connection portion 43 so that the first lower support rod 41 can rotate relative to the second lower support rod 42 .

The second door part 72 can be rotated by pulling out the locking rod 60 that locks the second door part 72 and the first door part 71 upward from the first door part 71 and the second door part 72. It has become. As shown in FIGS. 9 and 10, the second door section 72 can rotate outward from the closed state in which the first door section 71 and the second door section 72 are locked. The locking rod 60 serves as the upper locking rod portion 20 to lock the first upper support rod 11 constituting the second door section 72 and the second upper support rod 12 constituting the first door section 71, and The lower locking rod portion 50 is a rod that locks the first lower support rod 41 that constitutes the second door section 72 and the second lower support rod 42 that constitutes the first door section 71.

In the closed state, as shown in FIG. The wall 17 is in contact with the side surface of the first upper support rod 11 that constitutes the second door portion 72 . Further, the first upper wall 16 formed on the first upper support rod end portion 11b on the second fixing portion 82 side of the first upper support rod 11 constituting the second door portion 72 is connected to the second fixing portion 82. The second upper support rod 12 is in contact with the side surface of the second upper support rod 12 . In this way, the first upper wall 16 and the second upper wall 17 function as a stopper that prevents the second door portion 72 from rotating inward.

Similarly, in the closed state, as shown in FIG. The first lower wall 46 is in contact with the side surface of the second lower support rod 42 that constitutes the second fixing part 82 . Further, the second lower wall 47 formed on the second lower support rod end 42b on the second fixing portion 82 side of the second lower support rod 42 constituting the second fixing portion 82 is connected to the second door portion 72. The first lower support rod 41 is in contact with the side surface of the first lower support rod 41 . In this way, the first lower wall 46 and the second lower wall 47 function as a stopper that prevents the second door portion 72 from rotating inward.

As shown in FIG. 9, the first upper support rod end 11b on the second fixing portion 82 side of the first upper support rod 11 constituting the second door portion 72 has an R-shaped outline when viewed from above. have. The outline of this R-shape is an R-shape centered on the rotation fulcrum of the second door portion 72 (the center of the locking rod 60). Further, the second upper support rod end portion 12b of the second upper support rod 12 constituting the second fixing portion 82 on the second door portion 72 side has a similar R-shaped outline. As shown in FIG. 10, the first lower support rod end 41b on the second fixed portion 82 side of the first lower support rod 41 constituting the second door portion 72 has a similar R-shaped outline. There is. Further, the second lower support rod end portion 42b of the second lower support rod 42 constituting the second fixing portion 82 on the second door portion 72 side has a similar R-shaped outline. The contours of the R shape may all be formed in a semicircular shape, and may have the same radius. The radius of the R-shaped profile may be approximately half the width (dimension in the direction perpendicular to the longitudinal direction) of each of the support rods 11, 12, 41, and 42 when viewed from above.

In the shelf assembly according to this embodiment, for example, as shown in FIG. 1, a supported object 101 may be placed on the upper part of the ceramic shelf assembly 1 (for example, on the two first upper support rods 11). For example, the supported object 101 includes a shelf board spanned between the two first upper support rods 11 of the upper support frame 10, and an object to be fired (both not shown) placed on the shelf board. It may be composed of. Alternatively, the supported object 101 is composed of a support jig rod that is stretched between two first upper support rods 11, and a hanging jig (both not shown) that is suspended from the support jig rods. may have been done. In this case, the object to be fired may be placed on the floor surface 100a of the firing furnace 100 inside the ceramic shelf assembly 1.

When firing an object to be fired using the ceramic shelf assembly 1 according to the present embodiment, the ceramic shelf assembly 1 is first assembled outside the firing furnace 100. Subsequently, the object to be supported 101 containing the object to be fired is placed on top of the assembled ceramic shelf assembly 1. The ceramic shelf assembly 1 is carried into the firing furnace 100 with the supported object 101 placed thereon. Subsequently, the object to be fired in the firing furnace 100 is fired. At this time, heat is also applied to the ceramic shelf assembly 1, and the temperatures of the upper support rods 11 and 12, the pillars 30, the lower support rods 41 and 42, and the locking rod 60 rise. However, since the upper support rods 11 and 12, the struts 30, the lower support rods 41 and 42, and the locking rod 60 are made of ceramic material, the temperature inside the firing furnace 100 is too high for firing the object to be fired. Even at high temperatures, the strength of the ceramic shelf set 1 can be ensured. Therefore, the supported object 101 can be stably supported. When the firing of the object to be fired is completed, the ceramic shelf assembly 1 is carried out from the firing furnace 100 with the object to be fired after firing placed thereon. After cooling the object to be fired, the object to be fired is taken out from the ceramic shelf assembly 1.

On the other hand, when the object to be fired is placed on the floor 100a of the firing furnace 100 and fired, the ceramic shelf assembly 1 is first carried into the inside of the firing furnace 100. At this time, the ceramic shelf assembly 1 is placed inside the firing furnace 100 such that the first door portion 71 faces the entrance/exit of the firing furnace 100 . Next, inside the firing furnace 100, the locking rod 60 that locks the first door section 71 and the second door section 72 is pulled upward, and the first door section 71 is rotated outward to open it. Thereby, the object to be fired can be carried inside the ceramic shelf assembly 1 through the carrying opening formed between the first door part 71 and the second door part 72. After that, the first door part 71 is closed, and the locking rod 60 is inserted into the upper through holes 18 and 19 and the lower through holes 48 and 49 to lock the first door part 71 and the second door part 72. . In this way, the object to be fired can be placed on the floor surface 100a of the firing furnace 100 inside the ceramic shelf set 1 and fired. Next, the above-mentioned support jig rod as the supported object 101 is placed on the first upper support rod 11 on the upper part of the ceramic shelf assembly 1, and the hanging jig is suspended from the support jig rod. Thereafter, the object to be fired is fired. Note that when the object to be fired is relatively large, the ceramic shelf assembly 1 is arranged inside the firing furnace 100 so that the second door faces the entrance/exit of the firing furnace 100, and the second door 72 is rotated outward. The object to be fired may be transported by moving the container. The second door part 72 can also be opened by rotating outward by pulling out the locking rod 60 that locks the first door part 71 and the second door part 72 upward.

While the supported object 101 is placed on the ceramic shelf assembly 1, the load due to the weight of the supported object 101 is received by the two first upper support rods 11. The load received by the first upper support rod 11 is received by the column 30 that supports the first upper support rod 11 from below and the second upper support rod 12. That is, in the upper connecting part 13 that connects the first upper support rod 11 and the second upper support rod 12, the first upper support end surface 14 facing downward of the first upper support rod 11 is connected to the second upper support rod. The second upper support end surface 15 of the support member 12 faces upward. As a result, part of the load of the first upper support rod 11 is transmitted to the second upper support rod 12. The load received by the second upper support rod 12 is received by the column 30 that supports the second upper support rod 12 from below. The load received by each support column 30 is received by the lower support frame 40. In this way, the load of the supported object 101 is distributed within the ceramic shelf set 1, and the support of the supported object 101 can be stabilized.

After the firing of the object to be fired is completed, the ceramic shelf set 1 may be disassembled. The disassembled upper support rods 11, 12, struts 30, lower support rods 41, 42, and locking rod 60 may be stored. When assembling the ceramic shelf assembly 1 again, it can be assembled using the stored upper support rods 11, 12, columns 30, lower support rods 41, 42, and locking rod 60, and the upper support rods 11, 12 , the strut 30, the lower support rods 41, 42, and the locking rod 60 can be reused.

As described above, according to the present embodiment, the first upper support end surface 14 formed so as to be cut out from below in the first upper support rod 11 of the upper support frame 10 is cut out from below into the second upper support rod 12. It abuts on the second upper support end surface 15 formed in a cutout manner. Thereby, the load of the first upper support rod 11 received from the supported object 101 can be borne not only by the column 30 that supports the first upper support rod 11 but also by the second upper support rod 12. Therefore, the load of the supported object 101 can be dispersed within the ceramic shelf assembly 1, and the strength of the ceramic shelf assembly 1 in a high-temperature environment during firing can be improved.

Further, according to this embodiment, the first upper support rod 11 and the second upper support rod 12 are arranged at the same height position. As a result, the struts 30 that support the first upper support rod 11 from below and the struts 30 that support the second upper support rod 12 from below can be made common, and the configuration of the ceramic shelf assembly 1 is simplified. be able to. Further, the upper surface of the first upper support rod 11 and the upper surface of the second upper support rod 12 can be arranged at the same height position, and the upper surface of the first upper support rod 11 and the upper surface of the second upper support rod 12 can be arranged at the same height. It is possible to suppress the formation of a step. In this case, for example, the ceramic shelf assembly 1 can be stacked in multiple stages.

Further, according to the present embodiment, the struts 30 are inserted into the upper recesses 21 of the first upper support rod 11 and the second upper support rod 12. As a result, the first upper support rod 11 and the strut 30 can be firmly connected, and the second upper support rod 12 and the strut 30 can be firmly connected. Therefore, the support of the first upper support rod 11 and the second upper support rod 12 by the pillars 30 can be stabilized, and the strength of the ceramic shelf assembly 1 can be improved.

Further, according to this embodiment, the plurality of columns 30 are supported from below by the lower support frame 40. Thereby, the lower end portions of the plurality of support columns 30 can be connected by the lower support frame 40. Therefore, the strength of the ceramic shelf assembly 1 can be improved.

Further, according to the present embodiment, the first lower support end face 44 formed so as to be cut out from below in the first lower support rod 41 of the lower support frame 40 is cut out in the second lower support rod 42 from above. It is in contact with a second lower support end surface 45 formed so as to be cut out. Thereby, the load applied to the first upper support rod 11 and the second upper support rod 12 can be dispersed, and the strength of the ceramic shelf assembly 1 can be further improved.

Further, according to this embodiment, the first lower support rod 41 and the second lower support rod 42 are arranged at the same height position. As a result, the lower surface of the first lower support rod 41 and the lower surface of the second lower support rod 42 can be arranged at the same height position, and the lower surface of the first lower support rod 41 and the lower surface of the second lower support rod 42 can be arranged at the same height. Formation of a step with the lower surface can be suppressed. In this case, the ceramic shelf assembly 1 can be stably placed on the floor surface 100a of the firing furnace 100.

Further, according to the present embodiment, the struts 30 are inserted into the recesses 21 of the first lower support rod 41 and the second lower support rod 42. Thereby, the first lower support rod 41 and the column 30 can be firmly connected, and the second lower support rod 42 and the column 30 can be firmly connected. Therefore, the support of the column 30 by the first lower support rod 41 and the second lower support rod 42 can be stabilized, and the strength of the ceramic shelf assembly 1 can be improved.

Further, according to the present embodiment, the second upper support rod 12 and the second lower support rod 42 are connected by the column 30 to constitute the first door portion 71, and the first upper support rod 11 and the first lower support rod 42 are connected by the support column 30. The support rod 41 is connected to the support column 30 to form a first fixing portion 81 . The first door portion 71 is rotatable relative to the first fixing portion 81. Thereby, the first door part 71 can be opened by rotating outward with respect to the first fixing part 81. Therefore, when the object to be fired is placed on the floor surface 100a of the firing furnace 100 and fired, it is possible to easily carry the object into and out of the ceramic shelf assembly 1.

Further, according to the present embodiment, the ends of the first upper support rod 11 and the first lower support rod 41 that constitute the first fixing section 81 on the first door section 71 side, and the first door section 71 The ends of the second upper support rod 12 and the second lower support rod 42 on the first fixed part 81 side have an R-shaped outline when viewed from above. This makes it possible to prevent interference between the first upper support rod 11 and the second upper support rod 12 when rotating the first door section 71 relative to the first fixing section 81, and also prevents interference between the first upper support rod 11 and the second upper support rod 12. Interference between the support rod 41 and the second lower support rod 42 can be prevented. Therefore, the first door portion 71 can be smoothly rotated with respect to the first fixing portion 81.

Further, according to the present embodiment, the first upper support rod 11 and the first lower support rod 41, which are different from the first upper support rod 11 and the first lower support rod 41 of the first fixed part 81, are connected to each other by the support column 30. The second upper support rod 12 and the second lower support rod 42, which are different from the second upper support rod 12 and the second lower support rod 42 of the first door portion 71, are connected to each other to form the second door section 72. 30 to form a second door section 72. The second door portion 72 is rotatable relative to the second fixing portion 82. Thereby, the second door part 72 can be opened by rotating outward with respect to the second fixing part 82. Therefore, when the object to be fired is placed on the floor surface 100a of the firing furnace 100 and fired, it is possible to easily carry the object into and out of the ceramic shelf assembly 1.

Further, according to the present embodiment, the ends of the first upper support rod 11 and the first lower support rod 41 that constitute the second door section 72 on the second fixing section 82 side, and the second fixing section 82 The ends of the second upper support rod 12 and the second lower support rod 42 on the second door portion 72 side have an R-shaped outline when viewed from above. This makes it possible to prevent the first upper support rod 11 and the second upper support rod 12 from interfering with each other when the second door section 72 is rotated relative to the second fixed section 82. Interference between the support rod 41 and the second lower support rod 42 can be prevented. Therefore, the second door portion 72 can be smoothly rotated with respect to the second fixing portion 82.

Further, according to this embodiment, the first door part 71 and the second door part 72 are locked by the locking rod 60 that can be pulled out upward. As a result, when the first door section 71 and the second door section 72 are in the closed state, the first door section 71 and the second door section 72 can be locked by the locking rod 60, and the ceramic shelf assembly 1 can be locked. Strength can be ensured. Moreover, by pulling out the locking rod 60 upward, the first door part 71 can be opened by rotating outward with respect to the first fixing part 81, and the second door part 72 can be opened from the second fixing part 81. It can be opened by rotating it outward. Therefore, the first door section 71 can be easily opened and closed, and the second door section 72 can be easily opened and closed.

In addition, in this embodiment mentioned above, the example where the 2nd door part 72 was rotatable with respect to the 2nd fixed part 82 was demonstrated. However, the present invention is not limited to this, and the second door portion 72 does not need to be rotatable relative to the second fixing portion 82. That is, the first upper support rod 11 and the first lower support rod 41 that constitute the second door part 72 are rotated with respect to the second upper support rod 12 and the second lower support rod 42 that constitute the second fixed part 82. It does not have to be movable.

Furthermore, in the present embodiment described above, an example has been described in which the first door portion 71 is rotatable with respect to the first fixing portion 81. However, the invention is not limited to this, and the first door part 71 does not need to be rotatable with respect to the first fixing part 81. That is, the second upper support rod 12 and the second lower support rod 42 that constitute the first door portion 71 are rotated with respect to the first upper support rod 11 and the first lower support rod 41 that constitute the first fixed portion 81. It does not have to be movable. Furthermore, as described above, the second door part 72 does not need to be rotatable with respect to the second fixing part 82. That is, the ceramic shelf assembly 1 does not need to have a door opening/closing type structure.

Further, in the present embodiment described above, an example in which the plurality of support columns 30 are supported from below by the lower support frame 40 has been described. However, the present invention is not limited to this, and the lower support frame 40 may not be used as long as the strength of the ceramic shelf assembly 1 can be ensured.

Further, in the present embodiment described above, the upper connecting portion 13 has the first upper supporting end surface 14 and the second upper supporting end surface 15, and the lower connecting portion 43 has the first lower supporting end surface 44 and the second upper supporting end surface 15. An example having two lower support end surfaces 45 has been described. However, it is not limited to this. For example, in the case of placing the object to be fired on the floor surface 100a of the firing furnace 100 and firing it, the ceramic shelf assembly 1 facilitates the loading and unloading of the object to be fired into the inside of the ceramic shelf assembly 1. It is only necessary to have a door opening/closing structure as described above. That is, the first door portion 71 described above may be rotatable with respect to the first fixing portion 81. Further, the second door portion 72 may be rotatable relative to the second fixing portion 82. In this case, the upper connecting part 13 does not need to have the first upper supporting end surface 14 or the second upper supporting end surface 15, and the lower connecting part 43 does not need to have the first lower supporting end surface 44 or the second lower supporting end surface 45. It does not have to have.

Furthermore, in the present embodiment described above, an example has been described in which the upper support frame 10 and the lower support frame 40 are formed in a rectangular shape when viewed from above. However, the present invention is not limited to this, and the shapes of the upper support frame 10 and the lower support frame 40 when viewed from above are arbitrary.

The present invention is not limited to the above-described embodiments and modifications as they are, but can be implemented by modifying the constituent elements within the scope of the invention at the implementation stage. Moreover, various inventions can be formed by appropriately combining the plurality of constituent elements disclosed in the above embodiments and modified examples (including combinations of modified examples).

1 Ceramic shelf assembly 10 Upper support frame 11 First upper support rod 12 Second upper support rod 13 Upper connecting portion 14 First upper support end surface 15 Second upper support end surface 20 Upper locking rod portion 21 Upper recess 30 Pillar 40 Lower support Frame 41 First lower support rod 42 Second lower support rod 43 Lower connecting portion 44 First lower support end surface 45 Second lower support end surface 50 Lower locking rod portion 51 Lower recess 60 Locking rod 71 First door portion 72 Second Door part 81 First fixing part 82 Second fixing part 100 Firing furnace 101 Supported object

Claims (12)

A ceramic shelf assembly for supporting a supported object in a firing furnace,
an upper support frame extending laterally;
a plurality of columns extending in the vertical direction and supporting the upper support frame from below;
The upper support frame includes a first upper support rod, a second upper support rod that receives a load from the first upper support rod, and an upper connection portion that connects the first upper support rod and the second upper support rod. and,
The upper connecting portion includes a first upper support end surface formed such that an end of the first upper support rod on the side of the second upper support rod is cut out from below, and a first upper support end surface of the second upper support rod that is formed such that an end on the side of the second upper support rod is cut out from below. a second upper support end face formed such that the end on the side of the first upper support rod is cut out from above;
the first upper support end surface abuts the second upper support end surface ,
A first upper wall extends from the first upper support end surface to the lower surface of the first upper support rod,
A ceramic shelf assembly , wherein a second upper wall extends from the second upper support end surface to the upper surface of the second upper support rod . The ceramic shelf assembly according to claim 1, wherein the first upper support rod and the second upper support rod are arranged at the same height. The first upper support rod and the second upper support rod each have an upper recess that opens downward,
The ceramic shelf assembly according to claim 1 or 2, wherein the support column is inserted into the upper recess. The ceramic shelf assembly according to any one of claims 1 to 3, further comprising a lower support frame extending laterally and supporting the plurality of pillars from below. The lower support frame includes a first lower support rod disposed below the first upper support rod, a second lower support rod disposed below the second upper support rod, and the first lower support rod. and a lower connecting portion connecting the second lower support rod,
The lower connecting portion includes a first lower support end surface formed such that an end of the first lower support rod on the side of the second lower support rod is cut out from above, and a first lower support end surface of the second lower support rod that is formed such that an end on the side of the second lower support rod is cut out from above. a second lower support end face formed such that the end on the side of the first lower support rod is cut out from below;
The ceramic shelf assembly according to claim 4, wherein the first lower support end surface is in contact with the second lower support end surface. The ceramic shelf assembly according to claim 5, wherein the first lower support rod and the second lower support rod are arranged at the same height. The first lower support rod and the second lower support rod each have a lower recess that opens upward,
The ceramic shelf assembly according to claim 5 or 6, wherein the support column is inserted into the lower recess. The first upper support rod is connected to both ends of the second upper support rod via the upper connection part, respectively,
The first lower support rod is connected to both ends of the second lower support rod via the lower connecting portion, and
The second upper support rod and the second lower support rod are connected by the support column to form a first door portion,
One of the first upper support rods and the first lower support rod arranged below the first upper support rod are connected by the column to form a first fixing part,
The ceramic shelf assembly according to any one of claims 5 to 7, wherein the first door part is rotatable with respect to the first fixing part. Ends of the first upper support rod and the first lower support rod constituting the first fixing portion on the first door side, and the second upper support rod constituting the first door portion; The ceramic shelf assembly according to claim 8, wherein an end of the second lower support rod on the first fixed part side has an R-shaped outline when viewed from above. The upper connecting portion locks the first upper support rod different from the first upper support rod forming the first fixing portion and the second upper support rod forming the first door portion. further comprising an upper locking bar portion,
The lower connecting portion locks the first lower support rod different from the first lower support rod forming the first fixing portion and the second lower support rod forming the first door portion. further comprising a lower locking rod portion,
The upper locking rod portion and the lower locking rod portion are integrated with each other to form a continuous locking rod,
The ceramic shelf assembly according to claim 8 or 9, wherein the locking rod can be pulled out upward. The first door portion is configured at an end portion of the first upper support rod other than the first upper support rod constituting the first fixing portion on the opposite side to the first door portion side. The second upper support rod, which is different from the second upper support rod, is connected via the upper connection part,
The first door portion is configured at an end portion of the first lower support rod other than the first lower support rod constituting the first fixing portion on the opposite side to the first door portion side. The second lower support rod, which is different from the second lower support rod, is connected via the lower connection part,
The first upper support rod, which is different from the first upper support rod constituting the first fixing part, and the first lower support rod, which is disposed below the first upper support rod, are connected to the support column. are connected to form a second door part,
The second upper support rod, which is different from the second upper support rod constituting the first door part, and the second lower support rod, which is disposed below the second upper support rod, are connected to the support column. are connected to form a second fixing part,
The ceramic shelf assembly according to any one of claims 8 to 10, wherein the second door part is rotatable with respect to the second fixing part. Ends of the first upper support rod and the first lower support rod that constitute the second door portion on the second fixed portion side, and the second upper support rod that constitutes the second fixed portion; The ceramic shelf assembly according to claim 11, wherein an end of the second lower support rod on the second door side has an R-shaped outline when viewed from above.