JPS6227345B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support structure for pottery fired in a kiln.

Firing pottery is usually a lengthy process, involving a fairly time-consuming strengthening operation with high temperatures followed by slow cooling. Articles such as tiles are fired quickly in a kiln in a relatively short time, on the order of an hour. The present invention is specifically designed for use in rapid firing kilns.

In the first firing, the temperature of the pottery and the support structure supporting it is raised to the firing temperature. If the heat capacity of the support structure is too high, heat will be absorbed, which is uneconomical, and the temperature rise will be delayed, prolonging the firing time.

However, the usual supports for ceramics are not suitable for rapid firing kilns. This is because rapid heating and cooling imparts severe thermal shock to the support structure.

It is an essential requirement to have strong expansion and contraction effects and not damage the supporting structure. Otherwise, the pottery will be damaged.

It is an object of the present invention to provide a lightweight support structure for a kiln car that can withstand the thermal shock experienced within a rapid firing kiln.

According to the invention, a plurality of upright lightweight tubular struts;
A plurality of caps corresponding to the number of posts are disposed on the top of each post, each cap having a protrusion on its own underside that is configured to be received within the tubular end of the post. There is provided a support structure for pottery adapted to be mounted on a kiln wheel, characterized in that the means for supporting the pottery is integral with the cap.

The means for supporting the pottery consists of an upwardly directed projection on the top surface of each cap. These protrusions collectively support horizontal shelves or brickwork directly or in groups.

Preferably, the brick board is rectangular and has three circular through holes accommodating each protrusion, and the through holes are arranged in a triangular shape, and each through hole is connected to each edge of the brick board and this edge. It is placed approximately midway between the central line parallel to .

The brick board has a plurality of upright ridges on its upper surface that support the pottery.

The means for supporting the pottery may also consist of one or more pins or nails in direct contact with the pottery.

The struts are held in place by cemented rigid refractory fasteners that secure the struts to the kiln car.
Lateral movement of the base of the column is prevented by thick foundation bricks with holes. The holes are arranged to receive the bases of the struts and have a predetermined clearance for a tight fit over each strut.

The present invention will be explained below with reference to the drawings.

As shown in FIG. 1, the support structure includes thin walled ceramic tubes forming struts 10. As shown in FIG. The lower end of this column is the foundation support 12
It is housed in the recess 11 of. The base support is cemented or otherwise affixed to the kiln car or to an insulating wall located on the kiln car, as shown in FIG. In this embodiment, the insulating wall is formed by insulating bricks 13 arranged around the base support 12 . This insulating wall is necessary to ensure that the intense heat of the kiln does not adversely affect the kiln car drive gear located under the car floorboard.

The struts 10 are inserted into spaced holes 14 in the foundation brick 15. The above basic brick tile 1
5 has an insulating effect, but its first role is to prevent the support from falling in any direction.

The foundation brick 15 is shown in FIG. 5, from which it can be seen that three holes 14 are provided. The position of the holes 14 can be determined fairly accurately when forming the foundation brick 15. Therefore, the exact location of the hole is predetermined. For this reason, the support structure is placed by machine rather than by hand, if necessary, so that the upper brick board 19 (in use)
is always placed precisely over the tube.

The hole 14 is provided approximately centrally between the edge of the foundation brick and a central line parallel to this edge. The reason for doing this will be explained later.

As can be seen from the drawings, the holes 14 are deeper than their diameter and provide rigid support for the posts.

At the top of each column is a cap shown in FIG. This cap is loosely attached in place and is not rigidly fastened.
The cap 16 has a flange and a downwardly tapered tubular projection 17 on the underside of the cap. This shape is adapted to be inserted into the top of the column 10, as seen in FIG.

There is also an upright protrusion 18 on the upper side of the cap.
This protrusion 18 is used to directly or indirectly support the pottery.

If the glaze is dripping from the fired article, the article will only be placed on the cap. Therefore, only the inexpensive caps are soiled and replaced, and the expensive columns remain clean and do not need to be replaced. Forming the struts tubularly also provides a less expensive construction. This is because the cap can be easily arranged in a protruding manner.

The posts and caps support the pottery by means of brick boards 19 shown in FIGS. 1 and 2.
The brick board 19 is made of a thin ceramic material,
It has many ridges 20 projecting upward.
The brick board also has three through holes 21, each of which accommodates an upwardly directed projection 18 of the cap. This configuration is clearly shown in FIG.

The through holes 21 are also precisely spaced approximately midway between the edges of the brick board and the center line.
This interval corresponds to the interval between the through-holes 14 of the foundation brick 15.

The positions of these holes and through-holes are selected so that they are not close to the edges of the brickwork board or the foundation brickwork, and are also not centered.

According to our experience with quick firing kilns, the struts used to support the brick boards are
Easily absorbs and retains heat. This results in significant temperature differences within the strut area. Therefore, if the struts are placed on the edges, corners, or in the center line of the tile board, the tile board is susceptible to cracking. Surprisingly, it has been discovered that most of this risk of breakage is eliminated by placing the support midway between the edge of the brick board and a center line parallel to it. . This applies equally to brick boards supported by columns and to foundation bricks.

Furthermore, the through-holes and holes used in the brick boards and foundation bricks are circular and have a relatively small diameter. If through-holes or holes that are not circular are used, cracks are also likely to occur in the brick. This crack starts from the corner of the hole.

Brick tile board 19 is used, for example, for one-time firing of floor tiles which require sufficient support. However, the second firing of wall tiles usually does not require sufficient support.
This is because this tile holds its own to some extent. Therefore, the brick tile board is the second wall tile.
It is removed for firing and in other similar cases where sufficient support is not required.

In this case, the pottery is held directly on the upwardly projecting projection 18 of the cap 16.

If the glaze is applied to both the top and bottom surfaces of the pottery being held, there is a risk that the cap will damage the glaze. In such cases, other separate caps are used. This additional cap does not have upwardly extending projections 18, but instead has pins or nails to support the brickwork. In this case, in marked contrast to the other support structures described above, the brick boards are not supported by pins or nails on the posts, but only by the caps.

[Brief explanation of the drawing]

FIG. 1 is a side view of a support structure according to the invention, and FIG. 2 is a plan view of a brick board. FIG. 3 is a sectional view taken along line A--A in FIG. 2. FIG. 4 is a plan view and a central sectional view of the foundation support, and FIG. 5 is a plan view and a side view of the foundation brick. FIG. 6 is a plan view, a central sectional view, and a bottom view of the cap. 10... Pillar, 12... Foundation support, 14...
Hole, 15...Foundation brick, 16...Cap, 1
7, 18... protrusion, 19... brick tile board, 20...
Protuberance, 21...through hole.

Claims (1)

[Scope of Claims] 1. The upright columns have a lightweight tubular structure, and a number of caps corresponding to the number of columns are arranged, one at the top of each column, and each cap is housed within the tubular upper end of the column. comprising a plurality of upright posts, characterized in that the cap itself has a protrusion formed on its underside, the means for supporting the pottery being integral with the cap, and adapted to be attached to the kiln wheel. Support structure for pottery arranged in. 2. A support structure for pottery according to claim 1, further characterized in that the pottery support means comprises an upwardly directed projection on the top surface of each cap. 3. The support structure for pottery according to claim 2, further characterized in that the protrusion directly supports the pottery. 4. The support structure for pottery according to claim 2, further characterized in that the protrusions collectively support horizontal shelves. 5. In claim 4, the trellis is rectangular and has three circular through holes for accommodating the protrusions, and these through holes are arranged in a triangular shape, and each through hole is located at each edge of the trellis. and a central line parallel to the edge thereof. 6. The support structure for pottery according to claim 5, further characterized in that the rack has a plurality of upright ridges on the upper surface of the rack itself for supporting the pottery. 7. A support structure for pottery according to claim 1, further characterized in that the means for supporting the pottery comprises one or more pins or nails in direct contact with the pottery. 8. A support structure for pottery according to any one of the above claims, further characterized in that the support column is held by a hard refractory fixing member hardened with cement to fix the support column to a kiln wheel. 9. In any of the above claims, the base of each column is fitted into a hole in a thick foundation brick;
A support structure for pottery, further characterized in that the holes have a predetermined gap that closely fits each post.