JP6248817B2 - Metal plate roof structure, cross-shaped telescopic mechanism for metal plate roof and building - Google Patents

Description

The present invention is a metal plate roof structure relates to a cross-shaped extension mechanism and buildings for metallic metal plate roofs, particularly, suitable for use in stainless steel shop roots prismatic distribution reservoir, the surface of the metal plate shop roots The present invention relates to a metal plate roof structure capable of suppressing the occurrence of deformation and deformation sound due to a temperature change, a cross-shaped expansion / contraction mechanism for the metal metal plate roof, and a building using the metal plate roof structure.

  In order to maintain the water quality of the stored water, the reservoir may be provided with a roof. The surface temperature of this roof changes due to the influence of direct sunlight, and distortion and deformation due to thermal expansion and contraction occur. In addition, a sound like a drum hitting sound is also generated along with the deformation. In particular, the metal plate that forms the roof and side plate upper part provided in the gas phase part of the distribution reservoir is resistant to harsh environments due to the concentration of chlorine gas generated from chlorine-sterilized tap water. Two-phase stainless steel such as SUS329J4L, which is excellent in the quality, is used. However, since it is expensive, a design such as bending a roll or the like on a thin plate or reinforcing with a rib is performed.

  However, because it is a fully welded structure between the bottom plate and the side wall and there are many restraints, the roof plate becomes constrained and jumps and buckles when excessively expanded due to temperature rise or solar radiation. A sound like this is generated. This is considered to be a sound generated by a portion of the roof plate that is expanded by heat being deformed in a direction opposite to the arch shape of the bowl-shaped roof.

  In recent years, large-scale stainless steel square prismatic reservoirs (referred to as stainless steel reservoirs) have been constructed. However, since the roof area increases, the deformation due to the thermal expansion of the roofboard and the deformation sound caused by this It can no longer be ignored.

  Conventionally, measures have been taken to prevent deformation and distortion due to heat by increasing the thickness of the roof plate or attaching a reinforcing member to increase the rigidity. In addition, the processing and installation work has increased, and there is a concern of shortening the construction period and cost.

  As in the present application, as a technique for absorbing expansion and contraction due to thermal expansion, Patent Literature 1 discloses a resin expansion joint (crossed) in the circumferential and radial directions in a spherical shell roof of a vertical cylindrical tank that receives internal pressure. A tank structure is described in which a portion of the bellows shape is provided so as to absorb the expansion and contraction of the roof due to fluctuations in internal pressure and to stabilize the spherical shell shape.

  Moreover, the applicant has proposed in Patent Document 2 to provide an expansion / contraction mechanism in which a metal plate is pressed into a U-shape in one direction of the roof.

Japanese Patent Laid-Open No. 56-151685 JP 2013-108263 A

  If expansion and contraction can be eliminated using an expansion joint as in Patent Document 1, it is considered that deformation and sound can be reduced even with a thin plate, but the reservoir is an open-air tank that can be ventilated, and the roof receives internal pressure. Therefore, it is difficult to have a structure that supports the roof with an internal pressure as in Patent Document 1.

  Further, the technique of Patent Document 2 is a stretchable structure for deformation in one direction. As illustrated in FIG. 1 as a numerical simulation result of a vertical displacement contour, local variation occurs, and FIG. 2 shows the width of the expansion portion. As exemplified by the simulation result of the directional stress distribution, there is a problem that the stress cannot be absorbed well because the stress is concentrated especially on the base of the U-shape.

  The present invention has been made to solve the above-described conventional problems, and an object thereof is to eliminate stress concentration at the time of temperature change without using a resin expansion joint.

The present invention provides a metal plate roof structure, at least a part of the length and width direction of the metal plate constituting the roof, provided with a plurality of U-shaped extension mechanism of metal plates, said U-shaped expansion mechanism A U-shaped connecting portion connected to the U-shaped expansion / contraction mechanism in the longitudinal direction and the width direction , an intersecting portion of the U-shaped connecting portion, and the intersecting portion and the U-shaped connecting portion. The above-mentioned problem is solved by providing a cross-shaped expansion / contraction mechanism made of a metal plate having a bent portion provided therebetween.

Here, the cross-shaped expansion and contraction mechanism can be formed into a folding umbrella shape.

Further, the metal plate constituting the cruciform extension mechanism may be the same material as the metal plate constituting the Zenkiya roots.

  The present invention also includes a U-shaped connecting portion connected to the U-shaped expansion / contraction mechanism in the longitudinal direction and the width direction, an intersection of the U-shaped connecting portion, and the intersection and the U-shaped connecting portion. The present invention provides a cross-type expansion and contraction mechanism for a metal metal plate roof, which has a bent portion provided therebetween.

  Here, the cross-shaped expansion and contraction mechanism can be formed into a folding umbrella shape.

Further, the metal plate constituting the cruciform extension mechanism may be the same material as the metal plate constituting the Zenkiya roots.

  The present invention also provides a building having the above-described metal plate roof structure.

  According to the present invention, it is possible to eliminate stress concentration by providing a metal plate roof with two-way stretchability using a metal plate cross-shaped stretch mechanism. Therefore, without using a resin expansion joint, it is possible to suppress the occurrence of deformation and deformation sound due to a change in the surface temperature of the metal plate roof of the stainless steel reservoir. Particularly in stainless steel distribution areas constructed in residential areas, there are many complaints from neighboring residents regarding deformed sound, which is an effective technique as an acoustic measure.

  Further, Patent Document 1 shows a resin stretchable structure, but according to the present invention, since it is made of metal, conventional welding and inspection methods can be applied, and a structure having corrosion resistance strength similar to that of a roof. can do.

The figure which shows the simulation result of the vertical direction displacement contour which arises in a distribution reservoir roof when temperature rises when the technique of patent document 2 is employ | adopted. Similarly, the figure which shows the simulation result of the width direction stress distribution of the expansion part The top view which shows the whole structure of the distribution reservoir to which this invention is applied Similarly, an elevation view and a sectional view showing an enlarged main part Similarly, a perspective view showing the entire roof plate The perspective view which shows the left half of the roofboard which shows the structure of embodiment of this invention Similarly, (A) perspective view, (B) plan view, and (C) cross-sectional view along line CC in FIG. 7 (B) showing a U-shaped expansion and contraction mechanism in one direction in the longitudinal direction and the width direction. Similarly, (A) a plan view showing a cross-shaped expansion and contraction mechanism at an intersection, (B) a cross-sectional view taken along line BB in FIG. 8 (A), and (C) a perspective view. The figure which shows the simulation result of the vertical direction displacement contour which arises in a distributing reservoir roof when temperature rises in the said embodiment. Similarly, the figure which shows the simulation result of the width direction stress distribution of the expansion part

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by the content described in the following embodiment and an Example. In addition, the constituent elements in the embodiments and examples described below include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in the so-called equivalent range. Furthermore, the constituent elements disclosed in the embodiments and examples described below may be appropriately combined or may be appropriately selected and used.

  FIG. 3 is a plan view of the entire structure of the distribution reservoir to which the present invention is applied, FIG. 4 is an elevation view and a cross-sectional view thereof, and FIG. 5 is a perspective view of the entire roof plate.

  The distribution reservoir which is the object of the present invention has a rectangular shape as shown in FIG. 3 and, as shown in FIG. 4, for example, an arched roof with respect to the side plate 12 including the bottom plate 10 and the side wall upper portion 12U and the side wall lower portion 12L. The plate 14 is joined by welding. In the figure, 16 is a roof column, and 18 is an internal tension member.

  Here, the bottom plate 10 and the lower side wall 12L, which are the liquid phase part, are made of, for example, SUS316 or SUS304 stainless steel plate, and the roof plate 14 and the upper side wall which are gas phase parts that need to withstand harsh environments due to the concentration of chlorine gas. 12U is made of, for example, a SUS329J4L stainless steel plate.

  In this embodiment, as shown in the left half of the roof plate in FIG. 6, in the longitudinal direction and the width direction of the portion of the roof plate 14 such as the expansion 14E, FIG. 7 (A) (perspective view), (B) ( As shown in (plan view) and (C) (cross-sectional view taken along line CC in FIG. 7B), a stainless steel plate (for example, SUS316L) that is the same as or similar to the roof plate 14 is pressed into a substantially U shape. While providing the U-shaped expansion-contraction mechanism 26, FIG. 8 (A) (plan view), (B) (cross-sectional view along the BB line of FIG. 8 (A)) and (C) (C) ( As shown in the perspective view, a cross-type expansion / contraction mechanism 28 is provided in which a stainless steel (for example, SUS316L) steel plate that is the same as or similar to the roof plate 14 is pressed into a substantially folded umbrella shape.

  As shown in FIG. 8, the cross-shaped expansion / contraction mechanism 28 includes a U-shaped connection portion 28A connected to the U-shaped expansion / contraction mechanism 26 in the longitudinal direction and the width direction, and an intersection 28B of the U-shaped connection portion 28A. And a folding umbrella shape having a bent portion 28C provided between the intersecting portion 28B and the U-shaped connecting portion 28A, and the fold portion expands and contracts, whereby two directions in the longitudinal direction and the width direction are obtained. It can be adapted to absorb both thermal expansion in two directions.

  Here, the height of the intersecting portion 28B is higher than the height of the U-shaped connecting portion 28A.

  Further, the apex 28D of the intersecting portion 28B is formed in a concave shape to give rigidity.

  The cross-shaped expansion / contraction mechanism 28 can be made by pressing a single stainless steel plate. For example, a cracked portion can be formed by welding.

  The expansion mechanisms 26 and 28 are both welded to the roof plate 14.

  The expansion mechanisms 26 and 28 have the same corrosion resistance as that of the roof plate 14 by using the same or similar high corrosion resistance steel as that of the roof plate 14 in order to ensure the corrosion resistance to the tap water stored in the distribution reservoir. Has been.

  The extension mechanisms 26 and 28 can be placed in a position where the degree of restraint is high near the side plate or the partition plate, for example.

  Due to this structure, the expansion and contraction mechanisms 26 and 28 are deformed in two directions with respect to the thermal expansion of the roof plate 14, so that the generation of sound due to the deformation of the roof is prevented by preventing the concentration of stress and suppressing the occurrence of buckling. Can be reduced.

  In FIG. 9, the simulation result of the vertical direction displacement contour which arises in a reservoir roof when temperature rises similarly to FIG. 1 in this embodiment is shown. It can be seen that the local displacement generated in FIG. 1 has been eliminated.

  FIG. 10 shows the result of simulating the stress distribution in the width direction of the expansion portion in the present embodiment as in FIG. It can be seen that the stress concentration is relaxed compared to FIG.

  In the said embodiment, although this invention was applied to the rectangular rectangular reservoir roof, the shape of a reservoir is not limited to a rectangle, Other shapes, such as a square and a hexagon, may be sufficient. The material of the metal plate is not limited to stainless steel.

  Furthermore, the application target of the present invention is not limited to a reservoir, and can be applied to a general roof plate made of a metal plate.

DESCRIPTION OF SYMBOLS 10 ... Bottom plate 12 ... Side wall 14 ... Roof board 14E ... Expansion 26 ... U-shaped expansion-contraction mechanism 28 ... Cross-shaped expansion-contraction mechanism 28A ... U-shaped connection part 28B ... Intersection part 28C ... Bending part

Claims (7)

At least a part of the length and width direction of the metal plate constituting the roof, provided with a plurality of U-shaped extension mechanism of metal plate,
At the intersection of the U-shaped expansion / contraction mechanism,
A U-shaped connecting portion connected to the U-shaped expansion and contraction mechanism in the longitudinal direction and the width direction;
An intersection of the U-shaped connecting portion;
A bent portion provided between the intersecting portion and the U-shaped connecting portion;
Metal plate roof structure characterized in that a cross-shaped extension mechanism made of a metal plate having a. The metal plate roof structure according to claim 1, wherein the cross-shaped expansion and contraction mechanism has a folding umbrella shape. Metal plate roof construction according to claim 1 or 2 metal plates constituting the cruciform extension mechanism, characterized in that it is the same material as the metal plate constituting the Zenkiya roots. A U-shaped connecting portion connected to the U-shaped expansion and contraction mechanism in the longitudinal direction and the width direction;
An intersection of the U-shaped connecting portion;
A bent portion provided between the intersecting portion and the U-shaped connecting portion;
A cross-type expansion and contraction mechanism for a metal metal plate roof, characterized by comprising: The cross-type expansion / contraction mechanism for a metal metal plate roof according to claim 4 , wherein the cross-type expansion / contraction mechanism has a folding umbrella shape. Metal plate constituting the cruciform telescopic mechanism, cross-shaped for the metal of the metal plate roof according to claim 4 or 5, characterized in that it is the same material as the metal plate constituting the Zenkiya roots Telescopic mechanism. A building comprising the metal plate roof structure according to any one of claims 1 to 3 .