JP2006349259A - Structure of upper door in ceramics kiln - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of an upper door capable of sufficiently satisfying heat insulating effect, reducing its weight, and properly keeping its durability with respect to a ceramics kiln comprising the upper door for opening and closing an upper portion of a furnace main body. <P>SOLUTION: The upper door 3 is composed of a cover body 3a comprising a polygonal peripheral wall composed of a heat insulating material and formed along a peripheral wall of the furnace main body, holding members 3b having a U-shaped cross-section and holding the cover body in the U-shape in the thickness direction by every side of the polygonal shape of the cover body, a strip member 3c covering side portions of the holding members along the periphery of the cover body, and a fastening member 13 joined to one end of the strip member and fastening and joining the other end of the strip member to reduce a diameter of the strip member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a structure of an upper door of a ceramic pottery that opens and closes above a furnace body.

  Traditionally, pottery works made from clay. In order to obtain a predetermined strength and appearance, a pottery kiln that fires in a firing furnace is known. And in this pottery kiln, one end side of the upper door is swingably supported by the furnace body, and the upper door opening / closing structure that swings the upper door up and down to open and close the opening of the furnace body is provided. It is known (for example, refer nonpatent literature 1).

By the way, the upper door of the pottery kiln having the above-described structure is required to have heat insulation properties in order to suppress heat in the furnace and outflow of gas, and durability when repeatedly used at high temperatures. . In order to satisfy heat insulation and durability, some ceramic pottery furnaces are configured such that the upper door is formed of refractory bricks and the upper surface and outer periphery of the refractory bricks are covered with a metal body.
Registered Utility Model No. 3000775

  However, according to the configuration of the above-described conventional example, the weight of the upper door tends to increase, and there is a possibility that the operability when the operator opens and closes the upper door may be impaired. Further, when the upper door is swung up and down, an excessive stress is generated at the connecting portion between the upper door and the furnace main body, which may cause damage.

  Therefore, the present invention is a ceramic pottery equipped with an upper door that opens and closes the upper part of the furnace body, and has a structure of an upper door that can sufficiently satisfy the heat insulation effect, can be reduced in weight, and can maintain good durability. The purpose is to provide.

  The invention according to claim 1, which has been made in order to achieve the above object, includes a furnace main body configured by a polygonal peripheral wall and having an opening above the furnace main body, one end side being disposed above the furnace main body. The upper door is a structure of an upper door that is supported on the upper part and swings up and down with the one end side as a fulcrum, and that opens and shields the opening. A lid formed of a heat insulating material and provided with a polygonal peripheral wall along the peripheral wall of the furnace body, and the lid is sandwiched in a U-shape in the thickness direction for each side of the polygonal shape of the lid A band-shaped member that is attached to one end of the band-shaped member, and the band-shaped member is reduced in diameter so that the band-shaped member is bonded to one end of the band-shaped member. And a fastening member that fastens and fixes the other end of the member.

  According to the structure of the upper door of the ceramic pottery according to claim 1, the upper door is formed of a heat insulating material, and the lid is sandwiched in a U-shape in the thickness direction for each side of the polygonal shape of the lid. A clamping member to be worn, a band-shaped member covering a side of the clamping member, and a clamp that is bonded to one end of the band-shaped member and clamps and fixes the other end of the band-shaped member so that the diameter of the band-shaped member is reduced. For example, the weight can be reduced as compared with a general structure in which the upper surface and the outer periphery of the heat insulating material are covered with a metal body. Further, it is possible to maintain good durability when the upper door is repeatedly swung, and to reduce the occurrence of distortion when used at a high temperature for a long time.

  Further, the structure of the upper door of the ceramic pottery according to claim 1 is such that, as in the invention according to claim 2, the fastening member is disposed at a corner of the polygonal peripheral wall of the lid. As a result, it is possible to stably maintain tightening of the belt-shaped member so that the belt-shaped member does not loosen. Moreover, the structure of the upper door of the ceramic pottery according to claim 1 is tightened so that the belt-like member does not shift through the top of the polygonal shape because the upper door is constituted by a polygonal peripheral wall. The lid can be uniformly reinforced for each side of the polygonal shape.

  Moreover, the structure of the upper door of the ceramic pottery of Claim 1 or Claim 2 is like the invention of Claim 3, and the upper part of the said furnace main body has a cover body and the lower part of a clamping member. In the meantime, a gap with a radial end opening along the circumferential direction is formed, so that air flows into the gap and suppresses the rise in the temperature of the peripheral wall of the upper door. When used, the occurrence of distortion of the upper door can be reduced.

Moreover, the structure of the upper door of the pottery kiln according to any one of claims 1 to 3 is such that the upper door can swing freely at one end side of the furnace body as in the invention of claim 4. A supporting shaft is provided,
Since the upper door is supported by the support shaft from both sides of the upper door via the belt-like member, sufficient durability when the upper door is swung can be maintained. That is, the structure of the upper door of the pottery kiln of the present invention is supported by the support shaft from both sides via the belt-like member, so that one end of the upper door is supported directly by the support shaft. The stress of the support portion can be reduced and the durability can be improved.

  According to the structure of the upper door of the pottery kiln of the present invention, the upper door is formed of a heat insulating material, and sandwiching the lid body in a U-shape in the thickness direction for each side of the polygonal shape in the lid body For example, the upper door is heat-insulated because it is composed of a member, a belt-shaped member that covers the side of the sandwiching member, and a fastening member that tightens and fixes the belt-shaped member so that the belt-shaped member has a reduced diameter. The weight of the upper door can be reduced as compared with the case where the upper surface and the outer periphery of the material are covered with a metal body. In addition, according to the structure of the upper door of the pottery kiln of the present invention, the upper door is composed of a polygonal peripheral wall, so that the belt-like member is tightened so that the belt-like member does not shift through the top. The lid can be reinforced evenly on each side of the polygonal shape, the durability when the upper door is repeatedly swung can be maintained well, and distortion occurs when used at high temperatures for a long time. Can be prevented.

  Further, according to the structure of the upper door of the pottery kiln of the present invention, since a gap is formed between the lower part of the sandwiching member and the upper part of the furnace body facing the lower part, air is formed in the gap. Flows, the temperature rise of the peripheral wall of the upper door can be suppressed, and the occurrence of distortion when used for a long time at high temperature can be reduced.

  In addition, according to the structure of the upper door of the ceramic pottery of the present invention, since the upper door is supported on the support shaft from both sides via the belt-like member, the lid body of this upper door is supported directly on the support shaft. However, the stress of the supporting part can be reduced and the durability can be improved.

  Next, an embodiment of a door opening and closing structure of a ceramic pottery according to the present invention will be described with reference to the drawings. FIG. 1 is an external view showing the appearance of a ceramic pottery according to an embodiment of the present invention, in which (a) is a plan view seen from above, (b) is a front view seen from the front, and FIG. It is an external view showing the structure of the upper door of the pottery kiln of the same example, (a) is a plan view seen from above, (b) is a front view seen from the front, FIG. 3 is the same example It is sectional drawing showing the structure of the upper door of a pottery kiln.

  As shown in FIG. 1, the pottery kiln 1 is mounted on the furnace body 2 so as to be openable and closable so as to cover the furnace body 2 that is open at the top and formed in a substantially decagonal shape and the opening of the furnace body 2. And an upper door 3.

  The upper door 3 is configured to swing up and down with a support shaft 7 provided on one end side of the furnace body 2 as a fulcrum to open and shield the opening above the furnace body 2. Specifically, a support shaft support fitting 8 that supports the support shaft 7 is fixed to one end side of the furnace body 2, and the upper door 3 is swingably engaged with the support shaft 7 via the upper door support fitting 9. is doing. Further, the support shaft support fitting 8 is fixed to the peripheral wall of the furnace body 2 via bolts, and the upper door support fitting 9 is fixed to the peripheral wall of the upper door 3 via bolts. Further, a handle 4 that is gripped when the operator opens and closes the upper door 3 is provided on the other end side of the upper door 3.

  The upper door 3 is formed of refractory bricks (so-called a heat insulating material in the present invention) and includes a lid 3a having a polygonal peripheral wall along the peripheral wall of the furnace body 2, and a polygonal shape in the lid 3a. For each side, a plurality of sandwiching members 3b that sandwich the lid 3a in the thickness direction, a strip-shaped member 3c that covers the side of the sandwiching member 3b along the periphery of the lid 3a, and one end of the strip-shaped member 3c Are joined, and the fastening member 13 that fastens and fixes the other end of the strip-like member 3c so that the diameter of the strip-like member 3c is reduced. Further, the sandwiching member 3b and the strip-shaped member 3c are formed using a stainless material having good strength, corrosion resistance, heat resistance, and the like. Further, the tightening member 13 is disposed at a polygonal corner of the lid 3a.

  Further, the upper door support fitting 9 is supported by the support shaft 7 via the belt-like member 3c from both sides of the lid 3a with the line XX connecting the support shaft 7 and the handle 12 as the symmetry axis. Specifically, both ends of the upper door support fitting 9 extend from the connecting portion with the support shaft 7 and overlap the belt-like member 3c, and are bolted to the peripheral wall of the lid 3a integrally with the belt-like member 3c.

  Next, as shown in FIG. 3, the sandwiching member 3b has a U-shaped cross section, and includes an upper part 3f that contacts the upper surface of the lid 3a, and a lower part 3g that contacts the lower surface of the lid 3a. The upper portion 3f and the lower portion 3g are connected to each other, and the side portion 3h is in contact with the outer peripheral portion of the lid 3a.

  Moreover, the furnace body 2 has a peripheral wall formed of a refractory brick 2a and a metal body 2b covering the refractory brick 2a. Further, at the shielding position where the upper door 3a shields the furnace body 2, there is an end portion in the radial direction along the circumferential direction between the upper part of the furnace body 2 and the lower part 3g of the lid 3a and the sandwiching member 3b. An open gap C is formed.

  Next, as shown in FIG. 2, the band-shaped member 3 c has a pair of stainless steel bands 5, 6 that are narrower than the band-shaped member 3 c at both ends, joined by welding 5 h, 6 h, etc. It is fastened to the peripheral wall of the upper lid 3 a by the fastening member 13 through the bands 5 and 6.

  The fastening member 13 includes a housing 12 on which one band 5 is integrally fixed and rotatably supports the screw member 11, and the screw member 11. The other band 6 is provided with a plurality of engaging holes 6 a that are engaged with the threads of the screw member 11 at intervals of one pitch of the threads of the screw member 11.

  The screw member 11 includes a shaft portion 11a which is housed in the housing 12 and has a helical thread formed thereon, and a top portion 11b which is disposed outside the housing 12 and is connected to an end portion of the shaft portion 11a. When the top portion 11b is rotated, the shaft portion 11a is configured to rotate within the housing 12 together with the top portion 11b.

  The housing 12 has an end portion located on the lid 3 a side fixed to one band 5, and a gap 13 c through which the other band 6 is inserted between the one band 5 and the shaft portion 11 b of the screw member 11. Is configured.

  When the operator inserts the distal end side of the other band 6 into the housing 12 and rotates the screw member 11, the thread of the screw member 11 is sequentially engaged with the adjacent engagement holes 6a for each pitch. The other band 6 is pulled out from the housing 12, and the band-shaped member 3c is configured to tighten the outer periphery of the lid 3a.

  Next, the effect of the structure of the upper door 3 of the ceramic pottery 1 in the present embodiment will be described.

  According to the structure of the upper door 3 of the ceramic pottery 1 described in the present embodiment, the lid 3a of the upper door 3 is formed of heat-resistant bricks, and the lid 3a is sandwiched in a U-shape in the thickness direction. Since it is configured by the member 3b, a band-shaped member 3c that covers the side 3h of the sandwiching member 3b, and a tightening member 13 that tightens and fixes the band 6 so that the band-shaped member 3c is reduced in diameter. The upper door 3a can be reduced in weight as compared with the case where the upper surface and the outer periphery of the refractory brick are covered with a metal body. Further, it is possible to maintain good durability when the upper door 3a is repeatedly swung, and to reduce the occurrence of distortion when used at a high temperature for a long time.

  Further, in the structure of the upper door 3 of the ceramic pottery 1 described in the present embodiment, the belt-like member 3c may be loosened by the fastening member 13 being disposed at the polygonal corners of the lid 3a. As a result, it is possible to stably maintain the tightening of the belt-like member 3c.

  Further, in the structure of the upper door 3 of the ceramic pottery 1 described in the present embodiment, a gap C is formed between the lower part 3g of the sandwiching member 3b and the upper part of the furnace body 2 facing the lower part 3g. As a result, air flows into the gap C, the temperature rise of the peripheral wall of the upper door 3 is suppressed, and the occurrence of distortion of the upper door 3 when used for a long time at a high temperature can be reduced.

  Moreover, the structure of the upper door 3 of the ceramic pottery 1 described in the present embodiment is provided with a support shaft 7 that swingably supports the upper door 3 on one end side of the furnace body 2, and the upper door 3 is arranged on both sides. By being supported on the support shaft 7 via the belt-like member 3c from the side, it is possible to maintain sufficient durability when the upper door 3 is swung.

  As mentioned above, although one Example of this invention was described, this invention is not limited to the said Example, It can take various aspects. For example, in the structure of the upper door 3 of the ceramic pottery 1 of the present embodiment, each of the polygonal sides of the upper lid 3 is provided with a plurality of clamping members 3b, but instead of having these clamping members 3b individually. May be formed integrally.

  In addition, in the structure of the upper door of the ceramic pottery 1 of the present embodiment, the sandwiching member 3b, the band-shaped member 3c, the bands 5, 6 and the like are formed of stainless steel, but are not limited to stainless steel, heat resistance and strength The material may be selected from materials having a linear expansion coefficient close to that of the lid 3a.

  Moreover, in the structure of the upper door 3 of the ceramic pottery kiln 1 of the embodiment, the shapes of the furnace body 2 and the upper door 3 are configured in a decagonal shape. As long as the plane is configured. Moreover, you may form the recessed part which engages the clamping member 3b in the outer periphery of the cover body 3a.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view showing the external appearance of the ceramic pottery of one Example of this invention, Comprising: (a) is the top view seen from upper direction, (b) is the front view seen from the front. It is an external view showing the structure of the upper door of the pottery kiln of the same Example, (a) is a top view seen from the upper part, (b) is a front view seen from the front. It is sectional drawing showing the structure of the upper door of the pottery kiln of the Example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Ceramic pottery, 2 ... Furnace main body, 2a ... Refractory brick, 2b ... Metal body, 3 ... Upper door, 3a ... Cover body, 3b ... Clamping member, 3c ... Band-shaped member, 3f ... Upper part, 3g ... Lower part, 3h ... side part, 4 ... handle, 5 and 6 ... band, 5h and 6h ... welding, 6a ... engagement hole, 7 ... support shaft, 8 ... support shaft support fitting, 9 ... upper door support fitting, 11 ... screw member, 11a ... Shaft part, 11b ... Top part, 12 ... Housing, 13 ... Fastening member.

Claims (4)

A furnace main body configured by a polygonal peripheral wall and having an opening on the upper side, and disposed at the upper side of the furnace main body. An upper door that moves and opens and shields the opening;
With
The upper door is
A lid formed of a heat insulating material and provided with a polygonal peripheral wall along the peripheral wall of the furnace body;
A sandwiching member that sandwiches the lid in a U-shape in the thickness direction for each side of the polygonal shape in the lid;
A band-shaped member covering a side portion of the sandwiching member along the periphery of the lid,
A fastening member that is joined to one end of the belt-like member and fastens and fixes the other end of the belt-like member so that the belt-like member has a reduced diameter;
Composed of,
The structure of the upper door in the pottery kiln characterized by this.   The structure of the upper door in the ceramic pottery according to claim 1, wherein the tightening member is disposed at a corner of a polygonal peripheral wall of the lid.   The upper portion of the furnace body is formed with a gap having a radial end opened along the circumferential direction between the lid and the lower portion of the sandwiching member. Item 3. A structure of an upper door in a ceramic pottery according to item 2. A support shaft that swingably supports the upper door is provided on one end side of the furnace body,
The upper door is supported by the support shaft through the belt-like member from both sides of the upper door.
The structure of the upper door in the ceramic pottery according to any one of claims 1 to 3.

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