JP3523968B2 - Furnace shelves - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shelf plate for a kiln used in a firing process of ceramics (including tiles, roof tiles, etc.).

[0002]

2. Description of the Related Art Firing of ceramics is carried out in a continuous kiln such as a tunnel kiln or a shuttle kiln. In this case, first, the objects to be fired are placed on a shelf plate made of a refractory material, and the shelves on which the objects to be fired are placed are stacked in multiple stages on a trolley to form a shelf. This trolley is designed to move along a track provided in the kiln furnace, and as the trolley moves, the object to be fired passes through the heating, firing, and cooling process sections. . When assembling the shelves, in order to secure a space between the shelves, the shelves and columns supporting the four corners thereof are alternately stacked.

By the way, in recent years, in the production line for firing ceramics, automation of the process has been promoted, and automation has also been promoted in the above-mentioned shelving process. However, in the method of stacking the shelves and the columns alternately as described above, automation is difficult, so in recent years, so-called column-integrated shelves in which the columns are fixed to the shelf body are being used.

[0004]

In such an integrated type shelf board, the shelf board body and the columns are adhered by the refractory mortar, but the adhesive force is not so high. For this reason, for example, the pillars may come off from the shelf board body during assembling or firing, and if the pillar parts come off the shelf board body in this way, the stacked shelf boards may collapse. become.

As described above, since the shelf integrated with the support column is inferior in the reliability of the joint strength between the shelf body and the support, it is an obstacle to the automation of the production line.

As a shelf board developed to solve such a problem, for example, there is one disclosed in Japanese Patent Laid-Open No. 4-366389. The shelf board disclosed herein has three rectangular U-shaped cross-section columns in a rectangular shelf body, for example, SiC.
It is constructed by bonding with mortar, and a groove portion extending in a direction orthogonal to the fitting direction is formed on the support, and a groove portion facing the groove portion is also formed on the shelf main body. Then, the SiC mortar solidifies into a rod shape in the groove portion, and acts as a so-called retaining pin that prevents the pillar from coming out of the shelf main body.

However, even in the shelf having the above-mentioned structure, due to mechanical impact during repeated assembling, delamination at the joint interface between the mortar and the column and the shelf body, and deterioration of the mortar itself due to thermal shock, The strength of the joint between the shelf body and the columns may be reduced, and the shelf body and the columns may come off.

As described above, it is the current situation that a shelf plate in which the joining reliability between the shelf plate body and the support is sufficiently ensured has not been obtained. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shelf board in which the support pillars are not likely to be separated from the shelf board body.

[0009]

In order to achieve such an object, a first means is, in a kiln shelf, an engaging groove which is open on one surface and extends horizontally and which has an insertion end on at least one side. And a shelf body to which the pillar is attached and which is supported by the pillar, the pillar having at least a protrusion projecting upward or downward toward the engagement groove, At least an upper surface or a lower surface of the shelf main body is formed with a guide groove that has an inlet opening toward a side surface of the shelf main body and that engages with a corresponding protrusion of the strut, and the engagement groove of the strut is formed. And the above
Predetermined gap is formed between the main body of the shelf located in the engaging groove
And the gap is filled with mortar .

A second means is to mount a kiln furnace shelf on a column in which an engaging groove having an insertion end on at least one side is formed and which is open on one surface and extends in the horizontal direction. And a shelf main body supported by the pillar, the pillar having a protrusion protruding at least upward or downward toward the engagement groove, at least the upper surface or the lower surface of the shelf main body, A protrusion is formed which cooperates with a corresponding protrusion of the strut to act as a retainer for the strut, and the engagement groove of the strut and the inside of the engagement groove are formed.
A predetermined gap is formed between the main body of the shelf and
The gap is characterized by being filled with mortar .

According to these first and second means, the protrusion of the column and the guide groove or the protrusion of the shelf main body cooperate with each other so that the shelf main body of the column extends in the direction orthogonal to the insertion direction of the column. It is possible to prevent the slipping out. Also shelves
The impact that the shelf boards are repeatedly subjected to during assembly is relaxed by the mortar.
Struts and shelves books due to impact as they can be harmonized
Prevents body cracking and improves shelf life
You can

A third means is characterized in that the projection has a semicircular cross section.

[0013]

[0014]

A fourth means is characterized in that a through hole for injecting mortar is formed in the support, which communicates the outer surface of the support with the engaging groove.

According to the fourth means, it is possible to efficiently fill the mortar with the mortar.

A fifth means is characterized in that a stop means for positioning the support is formed in a guide groove or a protrusion of the shelf main body.

According to the fifth means , the columns can be accurately positioned with respect to the shelf main body.

A sixth means is characterized in that the stopping means comprises a wall surface which defines an end of the guide groove.

The seventh means is characterized in that a predetermined range of the engaging groove of the support column on the side opposite to the insertion end is expanded in the direction opposite to the insertion end.

According to the seventh means, when the predetermined range is filled with mortar, the mortar is formed in a wedge shape,
Acts as a retainer for the pillars from the shelf body.

The eighth means is characterized in that the length of the guide groove of the shelf main body in the longitudinal direction is longer than the width of the column.

A ninth means is characterized in that a convex portion for preventing the column from coming off is provided at the entrance of the guide groove of the shelf body.

According to the ninth means , even if, for example, the mortar deteriorates and is damaged and the connection between the shelf main body and the support is released, the support can be prevented from coming off the shelf main body. .

The tenth means is characterized in that the mortar is applied in a lump form in a region of the guide groove of the shelf main body which is not engaged with the support column.

According to the tenth means , even if the mortar is deteriorated and damaged and the connection between the shelf main body and the support is released, the support can be prevented from coming off the shelf main body. .

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. First Embodiment First, a first embodiment will be described. 1 to 5 are diagrams showing a first embodiment of the present invention.

As shown in FIG. 1, the shelf board has a guide groove 23.
A column 10A provided corresponding to A, a column 10B provided corresponding to the guide groove 23B, a column 10C provided corresponding to the guide groove 23C, and these three columns 10
A shelf body 20 to which A, 10B and 10C are mounted is provided.

Of these, the column 10A is made of a refractory material such as synthetic mullite and has a substantially rectangular parallelepiped shape as a whole. As shown in FIG. 2, the pillar 10A is provided with an engagement groove 12 that opens toward the front surface 11a thereof. The engagement groove 12 is parallel to the upper surface 11d and the bottom surface 11e of the column 10A, that is, faces the horizontal direction,
It extends from b toward the side surface 11c. This engagement groove 1
Both sides of 2 are the side surface 11b and the side surface 11c of the column 10A.
The opening on the side surface 11b side of these openings is the insertion end 13 of the engaging groove 12.

Further, as shown in FIGS. 2 and 3, the column 10A has a protrusion 14 which projects downward into the engagement groove 12. The surface of the protrusion 14 is the engaging groove 1
It forms part of the surface of 2. The protrusion 14 has a substantially trapezoidal cross-sectional shape, and extends horizontally between the side surface 11b and the side surface 11c. The height h of the protruding portion 14 gradually decreases from the side surface 11b to the side surface 11c, that is, the protruding portion 14 has a height h from the side surface 11c to the side surface 11c.
A taper (taper angle is indicated by α) is provided so as to taper toward b (that is, the insertion end 13 side).

Further, the peripheral edge 15 of the side surface 11b which defines the insertion end 13 of the engaging groove 12 is chamfered (a specific shape is omitted for simplification of the drawing).

Further, in the column 10B, the opening of the engagement groove 12 on the side surface 11c side is the insertion end 13 and the direction of the taper of the protrusion 14 is opposite to that of the column 10A. Only the difference is the same, and the rest is the same as the configuration of the column 10A. The support 10C has substantially the same structure as the support 10B. The width W of the support column 10C is preferably wider than the width of the support columns 10A and 10B.

Next, the shelf body 20 will be described. Figure 1
As shown in, the shelf main body 20 is made of a refractory material such as SiC and has a substantially rectangular plate shape. As shown in FIG. 3, the shelf main body 20 includes columns 10A to 10A.
It has a thickness t slightly smaller than the vertical width h _S of the engagement groove 12 of C. On the upper surface 21a of the shelf body 20,
As shown in FIG. 1, guide grooves 23A, 23B, and 23C are formed in a number (three in this embodiment) corresponding to the number of columns to be mounted (three in this embodiment). ing.

As shown in FIGS. 2 and 3, the guide groove 23A has a substantially trapezoidal cross section that opens upward, and the shelf main body 2 maintains a constant groove depth.
It extends parallel to the 0 side surface 22a. The length L of the guide groove 23A in the longitudinal direction is longer than the width W of the column 10A (see also FIG. 4).

The shape and dimensions of the shelf main body 20 near the guide groove 23A are such that when the support pillar 10A is mounted on the shelf main body 20 as shown in FIG.
A gap is formed with the surface of the engagement groove 12 of 0A. As shown in FIGS. 1 and 2, one end of the guide groove 23A has a side surface 22a extending in a direction perpendicular to the side surface 22a.
There is an opening at c, and this opening serves as an inlet 24 of the guide groove 23A. Further, at the other end of the guide groove 23A,
A wall surface 25 that defines a stop end (stop means) of the guide groove 23A is provided. This wall surface 25 (stop end) is
When the pillar 10A is inserted into the shelf main body 20 along the guide groove 23A, it serves to position the pillar 10A.

Further, as shown in FIG. 1, the guide groove 23B
Has the same shape as the guide groove 23A and is formed at a position symmetrical to the guide groove 23A with respect to the center line X of the shelf main body 20. In addition, the guide groove 23C is provided on the shelf main body 20.
It is formed at a position symmetrical to the guide groove 23A with respect to the center line Y of. The guide groove 23C is the same as the guide groove 23A except that the guide groove 23C is longer than the guide groove 23A. The length of the guide groove 23C is the same as that of the shelf main body 20 along the guide groove 23C.
Wall surface 25 defining the stop end of the insertion guide groove 23C
The length of the pillar 10C is such that the center of the pillar 10C coincides with the center line X of the shelf main body 20 when it is brought into contact with.

Next, the operation of the first embodiment having such a configuration (that is, the method of assembling the shelf board) will be described. In addition, the mounting of the column 10A in the guide groove 23A of the shelf board body 20 will be described below.
Supports 10B, 10 to the 0 guide grooves 23B, 23C
The mounting of C is also performed in parallel by the same method. Furthermore, hereinafter, in this specification (including the description of the second to fifth embodiments), the column 10A and the guide groove 23A (the protrusion 2 unless otherwise specified).
9A is also included), the columns 10B, 1
0C and guide grooves 23B, 23C (protruding portions 29B, 2
9C) is also omitted, but the pillar 10
The configurations and actions of B and 10C and the guide grooves 23B and 23C may be considered similar to the configurations and actions of the column 10A and the guide groove 23A.

First, the surface of the guide groove 23A of the shelf main body 20 and the surface of the side surface 22a, the upper surface 21a and the bottom surface 21b corresponding to the engaging groove 12 of the column 10A are mortar 40.
Is applied.

Next, as shown in FIGS. 2 and 3, the guide groove 23A of the shelf body 20 and the projection 14 of the support column 10A are engaged with each other, and the shelf body 20 is engaged with the support column 10A. The support 10A is attached to the shelf main body 20 so as to engage with the groove 12.
Is installed. In this case, the column 10A is inserted into the shelf main body 20 from the insertion end 13 side of the engagement groove 12, and the protrusion 14 defines the stop end of the guide groove 23A.
Is inserted until it touches. In this case, since the insertion end 13 side of the engagement groove 12 is chamfered, the column 10
When A is inserted, the mortar 40 applied to the surface of the guide groove 23A easily enters the engagement groove 12 of the column 10A.

Next, as shown in FIG. 4, mortar 41 is further applied in a lump form to the portion of the guide groove 23A of the shelf main body 20 which is not engaged with the protrusion 14 of the column 10A. The mortar 41 applied in the form of blocks is the support 10A.
It acts as a retainer for the guide groove 23A in the longitudinal direction. As a result, the mortar 40 in the engagement groove 12 is deteriorated and damaged, and the support 10A is guided by the guide groove 2 of the shelf body 20.
Even when the mortar 41 acts as a retainer even when attempting to escape from the 3A, the possibility that the pillar 10A will detach from the shelf main body 20 can be extremely reduced.

Next, the support column 10A and the shelf main body 20 are left to stand until the applied mortars 40 and 41 are dried. When the mortars 40 and 41 are solidified, the columns 10A are firmly fixed to the shelf main body 20. When the above steps are completed,
As shown in FIG. 3, the gap between the engagement groove 12 of the column 10A and the shelf main body 20 is filled with the solidified mortar 40. This completes the assembly of the shelf board.

As described above, according to the present embodiment, since the guide groove 23A of the shelf main body 20 and the protrusion 14 of the support column 10A are engaged with each other, the direction orthogonal to the longitudinal direction of the guide groove 23A. That is, it is possible to prevent the column 10A from coming off in the direction orthogonal to the insertion direction of the column 10A.

Further, since a predetermined gap is provided between the column 10A and the shelf main body 20 and this gap is filled with mortar (see FIG. 3), the impact repeatedly applied to the shelf during the assembling is mitigated. be able to. Therefore, it is possible to prevent the strut 10A and the shelf main body 20 from being cracked by the impact, and it is possible to improve the shelf life of the shelf. Further, it is possible to prevent the occurrence of stress due to the difference in the coefficient of thermal expansion between the column 10A and the shelf main body 20 due to the temperature change.

Further, according to this embodiment, each of the columns 10
The projections 14 of A, 10B and 10C are connected to the guide grooves 23A and 2A.
Each of the columns 10A, 10B, 1 for the shelf main body 20 is brought into contact with the wall surface 25 defining the stop end of the 3B, 23C.
The 0C positioning can be performed easily and accurately. Therefore, the positions of the columns 10A, 10B, and 10C of the shelves that are usually stacked and used in a large number of stages can be easily matched. Therefore, the stability when stacking the shelves is improved, and the shelving can be easily automated. Further, the assembly of the shelves can be automated.

In this embodiment, the support column 10A is used.
And a protruding portion 14 protruding downward into the engaging groove 12.
Although only one is provided, it is not limited to this,
As shown in FIG. 5, a protrusion 17 that protrudes upward into the engagement groove 12 may be further provided. In this case, the shelf main body 20 is also formed with the guide groove 27A corresponding to the protrusion 17. By doing this, the guide groove 23A (27A)
It is possible to more effectively prevent the columns 10A from coming off in the direction orthogonal to the longitudinal direction.

Further, instead of providing the projecting portion 14 so that the front surface of the projecting portion 14 coincides with the front surface 11a of the column (see comparison of FIG. 3), as shown in FIG. May be provided. In this case, the shelf main body 20 may be the same as that shown in FIGS. 1 to 4.

Further, in this embodiment, the protrusion 14
Although the cross-sectional shape of the above is a trapezoid, it is not limited to this and the cross-sectional shape of the protrusion 14 may be a substantially semicircular shape as shown in FIG. 7. By doing so, the support 10A can be attached to the shelf main body 20 more easily. Even in the case where the semi-circular protrusions are provided in this way, as shown in FIG. 7B, both the protrusions 14 protruding downward and the protrusions 17 protruding upward may be provided. . In this case, the protrusions 14 and 17 are provided on the inner side of the front surface 11a of the column 10A. Further, in this case, the shelf main body having the same structure as that shown in FIG. 5 is used.

Further, as shown in FIG. 8, a protrusion 26 may be provided on the groove bottom of the shelf main body 20 on the inlet side of the guide groove 23A. The size of the protrusion 26 is such that the distance te between the upper face of the protrusion 26 and the bottom face 21b of the shelf main body 20 is a distance he between the lower face of the protrusion 14 of the column 10A and the bottom face of the engaging groove 12 (see FIG. 3).
It is set to be slightly larger than (see). By doing so, the mortar 40 in the engagement groove 12 is deteriorated and damaged, and the support column 10A is fixed to the guide groove 23A of the shelf body 20.
Even when it is attempted to be pulled out, the projection 26 acts as a retaining member, so that the possibility that the column 10A is detached from the shelf main body 20 can be extremely reduced. In this case, the pillar 10A may be the same as that shown in FIGS. 1 to 4.

Second Embodiment Next, a second embodiment will be described. The second embodiment is different from the first embodiment in the position of the inlet 24 of the guide groove 23A of the shelf main body 20, and is otherwise substantially the same as the first embodiment. In the second embodiment, the same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 9, the guide groove 23A is not opened on the side surface 22c of the shelf main body 20, but instead is opened on the side surface 22a and the inlet 24 is formed on the side surface 22a. The width of the inlet 24 is slightly wider than the length of the protrusion 14 in the longitudinal direction (that is, the width of the support column 10A).
In this case, the pillar 10A may be the same as that shown in FIGS. 1 to 4.

According to the second embodiment, the column 10
The protrusion 14 of A is inserted into the guide groove 23A from the front surface 11a side through the inlet 24 (see arrow A in FIG. 9),
Then, it is moved in the direction of arrow B and mounted at a predetermined position.

Third Embodiment Next, a third embodiment will be described. The third embodiment is different from the first embodiment in the guide groove 23A.
Instead of the above, the difference is that a protrusion 29A is provided on the peripheral edge of the shelf main body 20, and the other points are substantially the same as those of the first embodiment. In the third embodiment, the same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the present embodiment, as shown in FIG. 10A, the side surface 2 is provided on the peripheral edge of the upper surface 21a of the shelf main body 20.
A protrusion 29A extending along 2a is provided. Also,
With the elimination of the guide groove 23A, instead of the wall surface 25, the projection 30 that defines the stop end (stopping means) has the projection 29.
It is provided on the upper surface of the end portion of A. As shown in FIG. 10B, the same column 10A as that shown in FIGS. 1 to 4 is used.

According to the third embodiment, the column 10
When A is mounted on the shelf main body 20, as shown in FIG. 10B, the protrusion 29A of the shelf main body 20 is arranged in a portion of the engagement groove 12 of the column 10A that is deeper than the protrusion 14. It The protrusion 29A of the shelf main body 20 cooperates with the protrusion 14 of the column 10A to act as a retainer in the direction orthogonal to the insertion direction of the column 10A. In this case, the pillar 10A is positioned with respect to the shelf main body 20 by positioning the side surface 11b of the pillar 10A on the insertion end 13 side and the convex portion 30.
This is done by bringing the and into contact with each other.

Fourth Embodiment Next, a fourth embodiment will be described with reference to FIG. The fourth embodiment is different from the first embodiment in that
The only difference is the shape of the engaging groove 12 and the protrusion 14 of the column 10A, and the other points are substantially the same as those of the first embodiment. In the fourth embodiment, the same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 11, the area A of the column 10A
Within the range of (insertion end 13 side), the shapes of the engagement groove 12 and the protrusion 14 are the same as those in the first embodiment.

On the other hand, within the range of the region B (opposite to the insertion end 13) of the column 10A, the engagement groove 12 is widened so that the vertical width thereof gradually increases. On the other hand, the sectional shape of the protrusion 14 is constant in the region B, and the protrusion 14 is inclined at an angle β with respect to the horizontal plane so as to be parallel to the upper surface of the engagement groove 12.

The width of the region B is preferably narrower than 1/2 of the length of the column 10A.
It is more preferable that the length is in the range of 1/3 to 1/4. Further, the width hS at the end of the engaging groove 12 on the region B side
Is preferably less than half the height of the column.

Next, the operation of the fourth embodiment having such a configuration will be described. According to the second embodiment, similarly to the first embodiment, the support 10A is attached to the shelf main body 20, and the gap between the shelf main body 20 and the support 10A in the engagement groove 12 is provided. Is filled with mortar. In this case, since the mortar in the range of the region B is formed in a wedge shape and functions as a retainer for the column 20, it is possible to prevent the column 10A from falling out in the longitudinal direction of the guide groove 23A of the shelf main body 20.

Fifth Embodiment Next, a fifth embodiment will be described. The fifth embodiment is different from the first embodiment in that a column 10A, a through hole 16 that connects the rear surface 11f of the column 10A and the engagement groove 12 are formed, and the other parts are the same. This is almost the same as the first embodiment. In the fifth embodiment, the same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 12, the column 10A and the column 1
Through hole 16 that connects rear surface 11f of 0A and engagement groove 12
Are formed. The diameter of the through hole 16 is slightly smaller than the thickness of the shelf main body 20.

Next, the operation of the third embodiment having such a configuration will be described with reference to FIG. Note that FIG. 13 is a partially cutaway perspective view showing a state in which the upper left ¼ of the column 10A is cut off in order to facilitate understanding of the flow of the mortar 42.

First of all, as shown in FIG.
The column 10A is attached to the predetermined position of. Next, the pillar 10
A Caulking gun (not shown) in the through hole 16 formed
Is inserted, and the caulking gun injects the mortar into the through hole 16 with a predetermined pressure. As shown in FIG. 13, the injected mortar fills the gap between the support groove 10A and the shelf main body 20 all over. By injecting the mortar in this way, the gap between the engagement groove 12 of the column 10A and the shelf main body 20 can be more completely filled.

In this embodiment, the mortar 4
In order to facilitate the filling of 2, the gap between the surface of the strut 10A engaging groove 12 and the surface of the shelf main body 20 is 0.5 mm on one side.
It is preferable that the above is secured. Further, in order to prevent rattling between the support pillar 10A and the shelf board body 20 when using the shelf board, the gap between the engagement groove 12 of the support pillar 10A and the shelf board body 20 may be 2 mm or less on one side. preferable.

[0065]

As described above, according to the present invention,
Since it is possible to effectively prevent the columns from coming off the shelf main body, it is possible to obtain a highly reliable shelf.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention,
The perspective view which shows the whole shelf board structure.

FIG. 2 is a perspective view showing the detailed configuration of a shelf main body and columns.

FIG. 3 is a cross-sectional view showing an engaged state of a shelf main body and a support.

FIG. 4 is a perspective view showing one step of the assembling work of the shelf board.

FIG. 5 is a cross-sectional view showing a modified example of the shelf board, showing an engaged state between the shelf board body and the support columns.

FIG. 6 is a view showing a modified example of the support column, and a sectional view showing an engaged state of the shelf main body and the support column.

FIG. 7 is a cross-sectional view showing a modified example of the support pillar, showing an engaged state between the shelf main body and the support pillar.

FIG. 8 is a perspective view showing a modified example of the shelf main body.

FIG. 9 is a perspective view showing a second embodiment of the present invention.

10 is a diagram showing a third embodiment of the present invention, FIG. 10 (a) is a perspective view showing a configuration of a shelf main body, and FIG.
0 (b) is a cross-sectional view showing an engaged state of the shelf main body and the support.

FIG. 11 is a diagram showing a structure of a column in a fourth embodiment of the present invention, FIG. 11 (a) is a front view and FIG.
11B is a view from the Z direction in FIG. 11A.

FIG. 12 is a view showing a fifth embodiment of the present invention and is a cross-sectional view showing a structure of a support column.

FIG. 13 is a partially cutaway perspective view showing an injection action of mortar according to the fifth embodiment.

[Explanation of symbols]

10A, 10B, 10C prop 12 engagement groove 13 Insertion end (of engaging groove) 14 Projection (of support) 16 through holes 20 Shelf board body 23A, 23B, 23C guide groove 24 Entrance (of guide groove) 25 Walls (stopping means) 26 Convex part (for retaining prop) 29A, 29B, 29C (projection part of shelf body) 30 convex part (stopping means) 40, 41, 42 mortar

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Claims (10)

(57) [Claims] 1. A support column having an engaging groove formed on one surface and extending in the horizontal direction and having an insertion end on at least one side, and a shelf main body to which the support column is attached and which is supported by the support column. The pillar has a projection that protrudes at least upward or downward toward the inside of the engagement groove, and at least an upper surface or a lower surface of the shelf main body has an inlet opening toward a side surface of the shelf main body. And a guide groove is formed to engage with the corresponding protrusion of the column .
Ri, and the shelf plate body positioned in the engagement groove and the engagement groove of said post
A predetermined gap is formed between the mortar and the mortar.
Shelf boards for kilns that are refilled . 2. A pillar having an engaging groove formed on one surface and extending in the horizontal direction and having an insertion end on at least one side, and a shelf main body to which the pillar is attached and which is supported by the pillar. The pillar has a protrusion projecting at least upward or downward toward the engaging groove, and at least an upper surface or a lower surface of the shelf body cooperates with a corresponding protrusion of the pillar. A protrusion that acts as a retainer for the support pillar is formed, and an engagement groove of the support pillar and a shelf plate body located in the engagement groove.
A predetermined gap is formed between the mortar and the mortar.
Shelf boards for kilns that are refilled . 3. The kiln furnace shelf plate according to claim 1, wherein the protrusion has a semicircular cross-section. 4. The shelf plate for a kiln according to claim 1 , wherein the support column is formed with a through hole for injecting mortar that connects the outer surface of the support column and the engagement groove. 5. A guide groove or a protrusion portion of the shelf body,
The shelf board for a kiln according to claim 1, wherein a stop means for positioning the pillar is formed. 6. The kiln furnace shelf plate according to claim 5, wherein the stopping means comprises a wall surface defining an end of the guide groove. 7. The kiln according to claim 1, wherein a predetermined range of the engaging groove of the strut on the side opposite to the insertion end is expanded in a direction opposite to the insertion end. Shelf board. 8. The shelf for a kiln according to claim 1, wherein a length of the guide groove of the shelf main body in a longitudinal direction is longer than a width of the column. 9. The kiln shelf according to claim 8 , wherein a convex portion for preventing the column from coming off is provided at the entrance of the guide groove of the shelf body. 10. A shelf board for a kiln according to claim 8 , wherein mortar is applied in a block form in a region of the guide groove of the shelf board body where the support pillar is not engaged.