JP2018165582A - Chimney structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chimney structure which has high followability to inter-layer deformation of a building when an earthquake occurs.SOLUTION: A chimney structure 5 which is provided at a building includes: a chimney body 6 in which a plurality of chimney units 10(10U, 10L) are connected to each other in the vertical direction by sandwiching a chimney unit connection member 12; a chimney support beam fixed to the building; and a chimney connection member for connecting the chimney body 6 and the chimney support beam. The chimney unit connection member 12 is constituted by including: a cylindrical connection material 25 formed in an annular shape so that a cross section forms a V-shape or a U-shape; and fixing metal hardware 26, 27 for fixing the cylindrical connection material 25 to the chimney units 10.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a chimney main body installed along a building or along a building outer wall surface, and a chimney structure for fixing the chimney main body to a building.

Generally, a building equipped with an engine generator, a boiler, and the like is provided with a chimney in order to emit exhaust gas.
Patent Document 1 discloses an exhaust pipe connection member 101 and an exhaust pipe connection structure 100 as shown in FIG. In the exhaust tube connection structure 100, the exhaust tube 102 and the exhaust tube 103 are connected by an exhaust tube connection member 101. The exhaust tube connecting member 101 includes a connecting tube 104 and fixing members 105 and 106. The fixing member 105 has a ring shape that is not closed. The fixing member 105 engages the fitting portion 105 b and the fitting portion 105 c with the rib 102 a of the exhaust tube 102 and the rib 104 a of the connection tube 104, and fixes the exhaust tube 102 to the connection tube 104. The fixing member 106 fixes the connection cylinder 104 to the exhaust cylinder 103.
When the chimney is provided in a middle-high-rise building or the like, the chimney is often constructed by connecting a plurality of chimney units up and down as shown in the exhaust pipes 102 and 103 in Patent Document 1.
Patent Document 2 discloses a connection structure between chimney units for blocking water intrusion into the chimney units and suppressing deterioration of a heat insulating material constituting the chimney units. Specifically, the chimney connection structure was similarly provided on the lower flange provided around the lower end of the chimney unit provided above and on the upper end of the chimney unit provided below. The upper flange is fixed with vertical fastening members such as bolts and nuts.

In the chimney with the connection structure as described above, since the chimney units are rigidly joined, for example, when the chimney is joined along the outer wall of the building, an earthquake occurs and the horizontal When an interlayer deformation occurs in a building due to a force, the chimney cannot follow the interlayer deformation of the building, and the chimney may be damaged.
On the other hand, Patent Document 3 discloses a building chimney 110 as shown in FIG. In the building chimney 110, a joint portion 112 including a frame member 113 is provided between the upper and lower chimney units 111U and 111L. The lower part 113a of the frame member 113 is joined to the lower chimney unit 111L. The upper portion 113b is attached to the outer periphery of the upper chimney unit 111U in an unfixed state. Steps 111a are formed on the opposing end surfaces of the upper and lower chimney units 111U and 111L, and are fitted so that they cannot be displaced laterally and can be displaced vertically. In the joint portion 112, the chimney units 111U and 111L are connected in a smooth point state so as to restrict lateral displacement with respect to the lower chimney unit 111L of the upper chimney unit 111U and to allow slight rotation. ing.
Accordingly, a chimney installed in a high-rise building is desired to have high followability so that it can follow the response deformation of the building that is greatly deformed during an earthquake.

JP 2012-241911 A Japanese Patent Laid-Open No. 2006-188747 Japanese Patent Laid-Open No. 2006-56633

  The present invention has high followability to bending deformation and shear deformation of buildings that occur at the time of an earthquake, suppresses smoke leakage from the connection part between the chimney units, and after the earthquake has stopped, it is attached before the earthquake occurs It is an object to provide a chimney structure that is restored to a state.

As a chimney structure to be installed in a building, the present inventors cover a connecting portion for connecting chimney units with an annular connecting member having a cross section of a U-shape or a U-shape, and separate the chimney main body upward. By fixing to the building structure via a possible chimney connection member, the chimney body has high followability to the building deformation at the time of the earthquake occurrence, and returns to the original joined state after the earthquake has stopped The chimney structure of the present invention has been achieved with a focus on the point of having a restoring force.
The present invention employs the following means in order to solve the above problems. That is, the chimney structure of the first invention is a chimney structure that is attached to a building, and a chimney body in which a plurality of chimney units are connected in a vertical direction with a chimney unit connecting member interposed therebetween, and the chimney structure fixed to the building. A chimney support beam, and a chimney connection member that connects the chimney main body and the chimney support beam, and the chimney unit connection member is formed in an annular shape so that the cross section has a U shape or a U shape. It is characterized by including a cylindrical connecting material and a fixed hardware for fixing the cylindrical connecting material to the chimney unit.
According to the above configuration, as the chimney unit connecting member for connecting the chimney units, the cylindrical connecting material having a cross-section or a U-shaped cross section is provided so as to cover the outer peripheral surface of the chimney unit. Therefore, when an earthquake occurs, the chimney main body is deformed, and when the upper chimney unit is tilted with respect to the lower chimney unit, the U-shaped part or the U-shaped part expands or contracts in the contracting direction. Thus, high deformation followability is realized.
Specifically, the chimney unit with the chimney units connected to each other has high followability to the building deformation that occurs at the time of the earthquake, and is restored to the installation state before the earthquake occurred after the earthquake stopped Thus, no gap is generated between the upper and lower chimney units, and therefore smoke leakage can be suppressed. Moreover, damage to the chimney can be suppressed.

In the chimney structure of the second invention, a fixing bolt is provided on the upper surface of the chimney support beam so that the shaft portion protrudes upward, and a sheath tube is covered on the shaft portion of the fixing bolt, and the chimney The connecting member is installed on the upper surface of the chimney support beam through which the sheath tube is inserted, and the chimney connection member can be separated from the chimney support beam upward along the sheath tube. It is characterized by being.
According to the above configuration, in addition to the above-described effects, the chimney connection member connected to the chimney main body is screwed with the fixing bolt that covers the sheath tube to the chimney support beam fixed to the building. Combined and provided so as to be separable from each other, when bending deformation occurs in the chimney main body at the time of earthquake occurrence, the chimney connecting member is separated from the chimney support beam with the inclination of the chimney unit, It can follow the deformation of the chimney body.

Further, the present invention is a chimney structure installed in the building as the chimney structure of the third invention, and a chimney body in which a plurality of chimney units are connected in a vertical direction with a chimney unit connecting member interposed therebetween, A slab structure in a building and a chimney connection member that connects the chimney main body, and the chimney unit connection member is formed in a ring shape so that the cross section has a square shape or a U shape. And a fixing hardware for fixing the cylindrical connecting member to the chimney unit, and an anchor bar is provided on the upper surface of the slab structure so as to protrude upward, and the anchor bar has a sheath. A pipe is covered, and the chimney connection member is installed on the upper surface of the slab structure with the sheath pipe inserted through a hole formed therein, and the chimney connection member extends along the sheath pipe with the slab structure. Upward from the body Providing a chimney structure, which is a possible contact.
According to such a configuration, even when the chimney main body is installed inside the building, the connection part between the chimney units, and the chimney main body and the building structure are the same as the effects of the first and second inventions. After the earthquake has settled, it has high follow-up to the building deformation at the time of the earthquake by installing deformation follow-up means (chimney unit connection member, chimney connection member) at the joint part with the body respectively Can return to its original bonded state.
Moreover, since the chimney main body has high deformation followability and has an excellent restoring force, it is possible to suppress smoke leakage from the connection part between the chimney units and damage to the chimney.

  According to the present invention, as a chimney structure to be installed in a building, the chimney units are connected to each other with an annular connecting member having a U-shaped or U-shaped cross section, so that high followability to building deformation at the time of earthquake occurrence And a chimney structure for a building having a resilience that returns to the original joined state after the earthquake has stopped.

It is a side view of the building provided with the chimney structure in a 1st embodiment of the present invention. It is a side view of a chimney structure. It is a perspective view of a chimney structure. It is sectional drawing of a chimney structure. It is the elements on larger scale (the 1) of the connection part of a chimney connection member and a chimney support beam in a chimney structure, (a) is a side view, (b) is a front view. It is the elements on larger scale (the 2) of the connection part of a chimney connection member and a chimney support beam in a chimney structure. It is a schematic diagram regarding the deformation | transformation mode between chimney units at the time of the occurrence of an earthquake. It is a schematic diagram regarding the deformation | transformation mode of the junction part of a chimney connection member and a chimney support beam at the time of the occurrence of an earthquake. It is a force test situation figure at the time of element experiment of a chimney structure. It is sectional drawing which shows the modification of the chimney structure in 1st Embodiment. The chimney structure in 2nd Embodiment of this invention, (a) is a plane sectional view, (b) is a side view. It is the elements on larger scale of the connection part of the chimney connection member of a chimney structure in 2nd Embodiment, and a slab structure. It is sectional drawing of the connection part of a chimney connection member and a slab structure of the chimney structure in 2nd Embodiment. It is explanatory drawing of the conventional exhaust pipe connection member and an exhaust pipe connection structure. It is explanatory drawing of the conventional chimney for buildings.

The present invention is a chimney structure including a chimney main body arranged along a building or along an outer wall surface of the building and a supporting method thereof. 1st Embodiment (FIGS. 1-8) and its modification (FIG. 10) are the chimney structure attached to a building outer wall surface, and 2nd Embodiment is a chimney structure arrange | positioned inside a building (FIGS. 11-13). ).
The feature of the present invention is that it has a high followability with respect to building deformation at the time of an earthquake by providing deformation following means at the connection part between the chimney units and the joint part between the chimney main body and the building structure, And after the earthquake has stopped, it has a restoring force to return to the original bonded state. The deformation follow-up means includes a chimney unit connecting member including a cylindrical connecting member having a cross-section of a U-shape or a U-shape provided on an outer peripheral surface of a connection portion between chimney units, and a chimney support beam and a chimney connecting member. It is a chimney connection member which moves up and down along the provided sheath tube.
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view of a building 1 having a chimney structure 5 according to the first embodiment, and FIG. 2 is an enlarged view of the chimney structure 5 shown in FIG.
The building 1 includes a lower structure portion 2 and an upper structure portion 3.
The lower structure portion 2 is provided on the ground surface GL, and the upper structure portion 3 is provided on the lower structure portion 2. The upper structure portion 3 has one side surface 3 b provided on the inner side of the building 1 than the side surface 2 b on the same side of the lower structure portion 2, and has a floor area smaller than that of the lower structure portion 2. As a result, the upper surface 2 a exposed upward is partially formed in the lower structure portion 2.
The building 1 includes a chimney structure 5. The chimney structure 5 is for releasing, for example, exhaust gas discharged from a generator or boiler (not shown) provided in the lower structure 2 of the building 1 to the outside. The chimney structure 5 protrudes above the upper surface 2a of the lower structure portion 2 formed as described above, and is provided along the side surface 3b of the upper structure portion 3. The chimney structure 5 includes a plurality of chimney support beams 4 that are fixed to the building 1 and spaced apart from each other in the direction along the side surface 3 b of the upper structure portion 3, and are supported by the chimney support beams 4. Has been. The upper end of the chimney structure 5 terminates at a height substantially equal to the upper surface 3a of the upper structure 3. In this way, the chimney structure 5 is attached to the building 1.

The chimney structure 5 includes a chimney body 6 in which a plurality of chimney units 10 are connected in a vertical direction with a chimney unit connecting member 12 interposed therebetween.
The chimney unit 10 constituting the chimney main body 6 is formed in a cylindrical shape, and the chimney unit 10 is positioned so that the axial direction C of the chimney units 10 substantially coincides with the vertical direction. The chimney main body 6 is constructed by stacking the chimney units 10. In the first embodiment, the chimney unit 10 has a circular cross section perpendicular to the axial direction C.

FIG. 3 is a partially enlarged perspective view of the chimney structure 5. In FIG. 3, the chimney units 10 are connected in the vertical direction. On the lower chimney unit 10L illustrated at the bottom, an upper chimney unit 10U illustrated in the center is provided.
The chimney unit connecting member 12 is formed in an annular shape larger than the outer periphery 10a of the chimney unit 10, and a joint portion between the lower chimney unit 10L and the upper chimney unit 10U, which is continuously provided up and down as described above. The chimney units 10L and 10U are connected so as to be covered from the outside and described in detail later. On the upper chimney unit 10U, another chimney unit 10 is provided connected by a chimney unit connecting member 12.

As shown in FIGS. 1 and 2, the chimney support beam 4 is provided so as to be positioned at a height near the upper end of the chimney unit 10 corresponding to each chimney unit 10. As shown in FIG. 3, two chimney support beams 4 are provided substantially parallel to each other so as to sandwich the chimney unit 10 in correspondence with each chimney unit 10. In the first embodiment, the chimney support beam 4 is H-shaped steel, and is provided vertically with respect to the upper flange 4a, the lower flange 4b, and the upper and lower flanges 4a, 4b. The web 4c which joins 4b is provided.
The chimney structure 5 includes a chimney connection member 13 that connects the chimney main body 6 and the chimney support beam 4. The chimney connection member 13 is joined to the vicinity of the upper end of each chimney unit 10 so as to protrude from the outer periphery 10a of the chimney unit 10 in the radial direction. The chimney connection members 13 are provided at positions opposite to each other around the axis C of the chimney unit 10, and each is connected to the upper flange 4 a of the chimney support beam 4.

FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3, and shows a joining state of the lower end portion of the upper chimney unit 10U shown in the upper side of FIG. 4 and the lower chimney unit 10L shown in the lower side. ing. The chimney unit 10 includes an inner member 20, an outer member 22, and a steel plate 23.
The inner member 20 is a substantially cylindrical member formed by embedding a wire mesh 21 wound in a cylindrical shape with fireproof cement or the like. The lower end portion 20b and the upper end portion 20e of the inner member 20 are respectively leg portions so as to protrude from the outer peripheral surface 20a of the inner member 20 to the radially outer side O by the thickness of the outer member 22 described below. 20c and the top part 20f are formed. On the outer side O of the upper surface of the inner member 20, a step portion 20 h is formed by being cut out at a depth corresponding to the thickness of a second fixed hardware 27 described later.
The outer member 22 is a cylindrical member provided so as to cover the inner member 20 from the outer side O by winding a heat insulating material such as a pearlite board on the outer peripheral surface 20 a of the inner member 20. The outer member 22 has a lower end portion 22b positioned on the leg portion 20c of the inner member 20 and an upper end portion 22e of the outer member 22 positioned below the top portion 20f of the inner member 20, respectively. The height of is formed. As described above, since the leg portion 20c and the top portion 20f of the inner member 20 protrude from the outer peripheral surface 20a of the inner member 20 by the thickness of the outer member 22, the outer portion of the leg portion 20c of the inner member 20 is outside. The leg outer peripheral surface 20d which is the surface, the outer peripheral surface 22a of the outer member 22, and the top outer peripheral surface 20g which is the outer surface of the top 20f of the inner member 20 are provided so as to be substantially continuous in the vertical direction. .
A steel plate 23 is formed in a substantially cylindrical shape so as to cover these outer peripheral surfaces 20d, 22a, and 20g from the outer side O. The inner member 20, the wire mesh 21, the outer member 22, and the steel plate 23 are fixed to each other by an anchor material 24 extending in the radial direction.

As shown in FIG. 4, the chimney unit connecting member 12 includes a first fixed hardware (fixed hardware) 26, a second fixed hardware (fixed hardware) 27, and a cylinder that fix the cylindrical connecting member 25 to the chimney unit 10. A mold connecting member 25 is included.
The first fixed hardware 26 is a member formed so as to cut out a circular steel plate having an outer diameter larger than the outer periphery 10 a of the chimney unit 10 with a circle having a diameter substantially equal to the outer periphery 10 a of the chimney unit 10. The first fixed hardware 26 is provided perpendicular to the outer periphery 10a so as to surround the outer periphery 10a of the chimney unit 10 from the outside at a certain position above the lower end 10e of the chimney unit 10, and is welded to the outer periphery 10a. Has been.
The second fixed hardware 27 is a member formed so as to cut out a circular steel plate having an outer diameter substantially equal to the outer diameter of the first fixed hardware 26 with a circle having a smaller diameter than the outer periphery 10 a of the chimney unit 10. The second fixed hardware 27 is placed so that the lower surface 27 b faces and closely contacts the stepped portion 20 h formed on the upper end portion 20 e of the inner member 20 of the chimney unit 10, and is welded to the steel plate 23. Yes. As described above, since the step portion 20h is formed with a depth corresponding to the thickness of the second fixed hardware 27, the upper surface 20i of the inner member 20 and the upper surface 27a of the second fixed hardware 27 are in the horizontal direction. It is provided so as to be substantially continuous.
As shown in FIG. 4, when the upper chimney unit 10U is provided on the lower chimney unit 10L, the upper surface 27a of the second fixed hardware 27 joined to the lower chimney unit 10L, and the upper chimney The lower surfaces 26b of the first fixed hardware 26 joined to the unit 10U are positioned to face each other.

At the upper end portion of the chimney unit 10, a frame-shaped or annular compression support material 14 is provided that protrudes to the outside O from the outer periphery 10 a of the chimney unit 10. The compression support material 14 is a heat-resistant packing formed of silicon rubber or the like. The compression support member 14 is formed so as to cut out a circular member having an outer diameter larger than the outer periphery 10 a of the chimney unit 10 with a circle having a diameter substantially equal to the inner periphery 10 f of the chimney unit 10.
As shown in FIG. 4, the compression support member 14 is placed on the upper surface 20 i of the inner member 20 and the upper surface 27 a of the second fixed hardware 27 of the lower chimney unit 10 </ b> L, and further on the upper side. When the chimney unit 10U is placed and the load of the upper chimney unit 10U is applied, the portion on which the upper chimney unit 10U is placed is compressed in the vertical direction. On the other hand, on the outer side, that is, the portion protruding from the outer periphery 10a of the upper chimney unit 10U to the outer side O is a non-compressed portion 14b that is not compressed because the load of the upper chimney unit 10U does not act directly, and the upper surface is It is higher than the lower end 10e of the chimney unit 10U.

The cylindrical connecting member 25 is provided in an annular shape on the outer periphery 10 a of the chimney unit 10. As shown in FIG. 4, the cylindrical connecting member 25 has a height direction of the cylindrical connecting member 25 when viewed in a cross-section so as to be orthogonal to the extending direction of the cylindrical connecting member 25, that is, the circumferential direction. That is, in the axial direction C of the chimney unit 10, a substantially central portion has a shape that protrudes outward in the radial direction O.
When this protruding end is the outer end portion 25a, the cylindrical connecting member 25 has an upper inclined portion 25b, a lower inclined portion 25c, an upper vertical portion 25f, and a lower vertical portion when viewed in cross section as shown in FIG. A portion 25g, an upper flange 25j, and a lower flange 25k are provided.
The upper inclined part 25b is provided to be inclined so as to extend radially inward I and upward from the outer end part 25a. The lower inclined portion 25c is provided to be inclined so as to extend radially outward I and downward from the outer end portion 25a. The upper inclined portion 25b and the lower inclined portion 25c are formed to have substantially the same length in sectional view.
Thus, the upper inclined portion 25b and the lower inclined portion 25c have a shape in which the side surface of the cylindrical body is bent with the outer end portion 25a as the center and the upper side and the lower side are inclined inward. Thus, the cylindrical connecting member 25 is formed so that the extending direction, that is, the cross section orthogonal to the circumferential direction has a square shape.

The upper vertical portion 25d is bent at the upper inner end portion 25d and extends upward from the upper inner end portion 25d at the upper inner end portion 25d that is the end point of the inner side I of the upper inclined portion 25b. 25f is provided. Further, at the lower inner end 25e, which is the end point of the inner side I of the lower inclined portion 25c, the lower inclined portion 25c is bent at the lower inner end 25e and extends downward from the lower inner end 25e. As shown, a lower vertical portion 25g is provided.
An upper flange 25j is provided at the upper end portion 25h of the upper vertical portion 25f so that the upper vertical portion 25f is bent substantially vertically at the upper end portion 25h and extends from the upper end portion 25h to the outer side O. A lower flange 25k is provided at the lower end 25i of the lower vertical portion 25g so that the lower vertical portion 25g is bent substantially vertically at the lower end 25i and extends from the lower end 25i to the outer side O. ing.
The upper flange 25j and the lower flange 25k are formed so as to be substantially parallel to each other as shown in FIG.

The cylindrical connecting member 25 formed as described above has an upper surface 27a of the second fixed hardware 27 in which the lower surface of the lower flange 25k is joined to the lower chimney unit 10L, and the upper surface of the upper flange 25j is the upper surface. The lower surface 26b of the first fixed hardware 26 joined to the chimney unit 10U is fixed by sandwiching a tape or the like as a heat-resistant packing at positions facing each other. In addition, the cylindrical connecting member 25 is provided in close contact with the inner peripheral surface 25l of the lower vertical portion 25g facing the outer surface 14a of the compression support member 14.
The lower flange 25k of the cylindrical connecting member 25 and the second fixed metal part 27 joined to the lower chimney unit 10L are connected to each other by bolts and nuts 28 via bolt holes (not shown) provided at positions corresponding to each other. Tightly connected. Similarly, the upper flange 25j and the first fixed hardware 26 joined to the upper chimney unit 10U are also fastened by bolts and nuts 28.
In this way, with the cylindrical connecting member 25 of the chimney unit connecting member 12 in contact with the outer side surface 14 a of the compression support member 14, the cylindrical shape is interposed via the first fixed hardware 26 and the second fixed hardware 27. By joining the connecting member 25 to both the lower chimney unit 10L and the upper chimney unit 10U, the lower chimney unit 10L and the upper chimney unit 10U are joined.

FIG. 5A is a side view of the portion indicated by the arrow B in FIG. 3, that is, the vicinity of the chimney connection member 13, and FIG. 5B is a front view of the portion indicated by the arrow B. FIG. 6 is a cross-sectional view taken along the line DD in FIG. In FIG. 6, in order to simplify the drawing, each bolt, nut, and washer are not shown in cross section, and their external shapes are shown.
The chimney connection member 13 includes two side plates 30, an upper plate 31, and a lower plate 32. The side plate 30 has a shape in which one corner of a rectangular steel plate is cut diagonally at the hypotenuse 30a and a trapezoid and a rectangle are joined on one side, and one short side 30b continuous to the hypotenuse 30a. Are arranged vertically so that the long side 30c located on the opposite side of the short side 30b is located on the lower side. The two side plates 30 are provided to face each other. On each of the upper side and the lower side of these two side plates 30, a rectangular upper plate 31 and a lower plate 32 having sides substantially the same as the short side 30b and the long side 30c are respectively provided. Are joined to the short side 30b and the long side 30c.
Thus, the chimney connection member 13 is formed by joining the four steel plates 30, 31, 32 in a cylindrical shape and joining them.

As shown in FIG. 5A, the chimney connection member 13 is positioned such that the oblique side 30 a of the side plate 30 faces outward and upward with respect to the chimney unit 10. Ends of the upper plate 31 and the lower plate 32 on the side to be joined to the chimney unit 10 are cut out in an arc shape inward by the same radius of curvature as the outer periphery 10a of the chimney unit 10. Thereby, each of the two side plates 30, the upper plate 31, and the lower plate 32 is in line contact with the outer periphery 10a of the chimney unit 10 at the end side on the chimney unit 10, and the chimney unit is welded at this contact portion. 10 are joined to the outer periphery 10a.
On the outer side of the side plate 30 in the circumferential direction of the chimney unit 10, a fixing member 33 manufactured based on L-shaped steel is composed of two plates constituting the fixing member 33, the outer periphery 10 a of the chimney unit 10 and the side plate 30. And are fixed by being welded to them. The fixing member 33 and the side plate 30 are joined together by bolts and nuts 34 in addition to welding.

As described above, the chimney connection member 13 is joined to the upper flange 4 a of the chimney support beam 4. A bolt hole 4e is formed in a portion of the upper flange 4a where the chimney connection member 13 is joined. A shaft portion 60a of a fixing bolt 60 is inserted into the bolt hole 4e from below the upper flange 4a with the lower washer 61 interposed therebetween. The shaft portion 60a is inserted from above the upper flange 4a. A nut 63 is screwed with the upper washer 62 interposed therebetween. In this manner, the fixing bolt 60 is fixed to the chimney support beam 4 so that the shaft portion 60a protrudes upward from the upper surface 4d of the upper flange 4a of the chimney support beam 4. A sheath tube 65 having an inner diameter substantially equal to the outer diameter of the shaft portion 60 a is inserted into the shaft portion 60 a that protrudes upward, and the shaft portion 60 a is inserted into the shaft portion 60 a and placed on the nut 63. Thus, it is provided so as to cover the shaft portion 60a.
On the upper flange 4a, a seat plate 35 having a length equivalent to the width of the lower plate 32 and a width equivalent to the upper flange 4a is provided. A hole 35a having a diameter larger than that of the upper washer 62 and the nut 63 is formed in the seat plate 35 at a position corresponding to the fixing bolt 60. The seat plate 35 has a shaft portion 60a and a sheath tube 65 provided with the hole 35a. It is positioned so as to be inserted, and is provided on the upper flange 4a.
In the lower plate 32 of the chimney connection member 13, similarly to the seat plate 35, a hole 32 a having a diameter larger than that of the upper washer 62 and the nut 63 is provided at a position corresponding to the fixing bolt 60. The chimney connection member 13 is positioned so that the shaft portion 60a and the sheath tube 65 are inserted into the hole 32a formed in the chimney connection member 13, and more specifically, the upper surface 4d of the chimney support beam 4 and more specifically the seat plate. The chimney connection member 13 is installed along the sheath pipe 65 so as to be separable upward from the chimney support beam 4.

A circular position adjustment plate 64 having an outer diameter larger than the diameter of the hole 32a is positioned on the upper surface 32b of the lower plate 32 of the chimney connection member 13 so that the outer shape of the position adjustment plate 64 covers the hole 32a. Are joined. The position adjustment plate 64 is provided with a hole 64a having a diameter larger than the outer diameter of the sheath tube 65, and the shaft portion 60a and the sheath tube 65 of the fixing bolt 60 are inserted into the hole 64a.
Thus, when each member is positioned, the length of the sheath tube 65 is determined so that a certain distance is provided between the upper surface 64b of the position adjusting plate 64 and the upper end 65a of the sheath tube 65. Yes.
A locking nut 66 having a shape larger than the hole 64a of the position adjusting plate 64 is screwed onto the shaft portion 60a from above, and the sheath pipe 65 is firmly sandwiched and fixed by the nut 63 and the locking nut 66. It is tightened.

The materials and dimensions of the chimney connection member 13 and the chimney unit connection member 12 as described above can be designed and verified on the assumption that an earthquake or thermal extension acts on the chimney structure 5.
For example, with respect to the chimney connection member 13, as shown in FIG. 1, in the first embodiment, the chimney support beam 4 fixed to the building 1 divides the chimney structure 5 for each layer via the chimney connection member 13. The chimney support beam 4 and the chimney connection member 13 at least partially bear the load of the chimney unit 10. The chimney connection member 13 that supports the chimney unit 10 is subjected to vertical weight as a long-term load and an earthquake load as a short-term load. Therefore, for example, assuming that the chimney connection member 13 bears all the weight of the chimney unit 10, as a vertical load, for example, 2G, that is, twice the weight, as a horizontal load, for example, 1.5G, that is, 1 of the weight. It is desirable to design and verify specifications such as the material and dimensions of the chimney connection member 13 assuming that .5 times is set as the seismic load and both of these loads act on the chimney connection member 13 simultaneously.

More specifically, as described with reference to FIGS. 5A and 5B, the chimney connection member 13 is formed in a cylindrical shape by combining the steel plates 30, 31, and 32 in the first embodiment. Therefore, in each of the two directions perpendicular to each other in the horizontal plane where the edges forming the steel plates 30, 31, 32 extend, the short-term vertical seismic load and horizontal seismic load are added together, and the chimney unit is formed by interlayer deformation. It is reasonable to study the chimney connection member 13 while the 10 is rotating, that is, in a locked state.
Further, when the temperature of the chimney structure 5 is maximum at the time of use, for example, rises to 75 ° C. and decreases to −25 ° C. at the time of non-use in winter, the chimney unit 10 is caused by thermal expansion in the axial direction C. Assuming a change in length, the deformation reaction force of the chimney unit connecting member 12 is calculated based on this change. It is desirable to evaluate the performance of the chimney connection member 13 and the chimney unit connection member 12 by using the vertical load obtained by adding the loads derivable from the deformation reaction force as the maximum vertical load.

Next, the operation of the chimney structure 5 will be described with reference to FIGS. 1 to 6 and FIGS. Fig.7 (a) is a schematic diagram explaining the effect | action of the chimney structure 5 when an interlayer deformation | transformation generate | occur | produces in the building 1, FIG.7 (b) is an expansion of the E arrow part of Fig.7 (a). FIG. FIG. 8 is an enlarged view of the portion indicated by the arrow F in FIG.
When an earthquake occurs and an interlayer deformation occurs in the building 1 due to a horizontal force, the upper chimney support beam 4U joined to the upper chimney unit 10U located above the two chimney units 10 connected vertically is A case will be described in which the lower chimney support beam 4L joined to the lower chimney unit 10L positioned on the lower side is relatively moved in the right direction on the paper surface of FIG.
At this time, together with the upper chimney support beam 4U that is about to move in the right direction, the upper chimney unit 10U that is joined to the upper chimney support beam 4L is also lower than the lower chimney support beam 4L and the lower chimney unit 10L that is joined thereto. Try to move to the right.

As shown in FIG. 4, a compression support member 14 is interposed between the lower chimney unit 10L and the upper chimney unit 10U. Since the load of the upper chimney unit 10U acts on the compression support member 14, the compression support member 14 is strongly pressed in the vertical direction, and as described above, the compression support member 14 is formed of silicon rubber or the like. Since the packing is made, the interface between the lower chimney unit 10L and the compression support member 14 and the interface between the compression support member 14 and the upper chimney unit 10U each have a frictional force of a certain level and are not slippery. It has become.
Temporarily, the force that the upper chimney unit 10U tries to move to the right exceeds the frictional force between the lower chimney unit 10L and the compression support member 14, and the upper chimney unit 10U and the compression support member 14 become lower chimney unit 10L. The outer side surface 14a of the compression support member 14 is fixed to the second fixed hardware 27 joined to the lower chimney unit 10L, even if it is going to move relative to the right. Since it is in close contact with the inner peripheral surface 25l of the vertical portion 25g, this relative movement is suppressed.
Further, the force with which the upper chimney unit 10U tries to move in the right direction is superior to the frictional force between the upper chimney unit 10U and the compression support member 14, and the upper chimney unit 10U acts on the lower chimney unit 10L and the compression support member 14. On the other hand, the upper surface of the compression support member 14 of the compression support member 14 projecting outward from the outer periphery 10a of the upper chimney unit 10U is higher than the lower end portion 10e of the upper chimney unit 10U, even if it is relatively moved to the right. Since the height is higher, the relative movement is suppressed by the upper chimney unit 10U coming into contact with the non-compression portion 14b.
That is, the upper chimney unit 10U is restrained from moving in the lateral direction relative to the lower chimney unit 10L, and as a result, as shown in FIG. An attempt is made to rotate and deform a point 10b having an outer periphery at the lower end of the upper chimney unit 10U as a fulcrum.

Here, in the chimney unit connecting member 12 that connects the lower chimney unit 10L and the upper chimney unit 10U, as shown in FIG. 4, the tubular connecting member 25 is bent around the outer end portion 25a in the sectional view. Since the upper inclined portion 25b and the lower inclined portion 25c located on both sides of the outer end portion 25a have a shape extending from the outer end portion 25a in substantially the same direction, that is, the inner side I, the outer end The upper inclined portion 25b and the lower inclined portion 25c are opened and closed around the portion 25a, so that the structure can easily expand and contract in the vertical direction.
When the upper chimney unit 10U is locked, the upper chimney unit 10U is inclined at the contact side 10b of the upper chimney unit 10U and the lower chimney unit 10L on the right side in FIG. As a result, the angle formed between the outer peripheries 10a of the upper and lower chimney units 10U and 10L with the contact 10b as the center is reduced. With this, in the cylindrical connecting member 25, the upper inclined portion with the outer end portion 25a as the center. The angle between 25b and the lower inclined portion 25c becomes smaller, the upper inclined portion 25b and the lower inclined portion 25c contract so as to close, and follow the locking of the upper chimney unit 10U.
Further, on the left side in FIG. 7 (b), on the separation side 10c opposite to the contact side 10b with respect to the central axis C of the chimney unit 10, the upper chimney unit 10U and the lower chimney unit 10L are separated from each other. The angle between the upper inclined portion 25b and the lower inclined portion 25c increases with the outer end portion 25a as the center to follow the separation, and the upper chimney is extended so that the upper inclined portion 25b and the lower inclined portion 25c are opened. Follow the locking of the unit 10U.

As described with reference to FIG. 6, the fixing bolt 60 is provided on the upper surface 4 d of the chimney support beam 4 so that the shaft portion 60 a protrudes upward, and the sheath tube 65 is provided on the shaft portion 60 a of the fixing bolt 60. The chimney connection member 13 is placed on the upper surface 4d of the chimney support beam 4 with the sheath pipe 65 inserted through the hole 32a opened therein.
Thus, since the chimney connection member 13 is provided so as to be able to be separated from and connected to the upper flange 4a and the seat plate 35 of the chimney support beam 4, the upper chimney unit 10U is locked and tilted as described above. 8, the lower surface 32c of the lower plate 32 of the chimney connection member 13 moves away from the upper surface 35b of the seat plate 35, as shown in FIG.
Above the sheath pipe 65, a locking nut 66 having a shape larger than the hole 64a of the position adjusting plate 64 is screwed, whereby the lower plate 32 of the chimney connection member 13 is fixed to the fixing bolt 60 and the sheath pipe 65. The fall of the chimney unit 10 due to the removal from the unit is suppressed.

As described above, the position adjustment plate 64 is welded to and integrated with the lower plate 32 of the chimney connection member 13 on the lower plate 32 constituting the chimney connection member 13. A hole 64a is formed in the position adjusting plate 64. As shown in FIG. 6, a sheath tube 65 is provided so as to pass through the hole 64a and the hole 32a of the lower plate 32.
When the chimney main body 6 is deformed along with the deformation of the building 1, the chimney connection member 13 connected to the chimney main body 6 moves the position adjustment plate 64 joined thereto in the vertical direction along the sheath tube 65. Thus, high followability was realized for the deformation of building 1. In FIG. 6, the range in which the chimney connection member can move up and down is indicated as R. In the first embodiment, the vertically movable distance of the chimney connection member 13 is, for example, 40 mm.

  Next, the effect of the chimney structure 5 will be described.

  According to the configuration as described above, the cylindrical connecting member 25 is formed so that a cross section perpendicular to the extending direction has a square shape. That is, the tubular connecting member 25 is bent around the outer end portion 25a in a sectional view, and the upper inclined portion 25b and the lower inclined portion 25c located on both sides of the outer end portion 25a are substantially omitted from the outer end portion 25a. Since it has a shape extending in the same direction, that is, the inner side I, the upper inclined portion 25b and the lower inclined portion 25c open and close with the outer end portion 25a as a center. It has become. Further, the chimney units 10 are connected to each other through the chimney unit connecting member 12 provided with the cylindrical connecting member 25. Accordingly, an interlayer deformation occurs in the building 1 due to the earthquake, and accordingly, a bending deformation occurs in the chimney main body 6 so that the upper chimney unit 10U tilts down with respect to the lower chimney unit 10L. When attempting to rotate and deform with one point 10b having the outer periphery at the lower end of the tube as a fulcrum, the tubular connecting member 25 acts as follows. That is, at the contact side 10b of the upper and lower chimney units 10 serving as a fulcrum for rocking, the upper chimney unit 10U tilts, so that the angle formed between the outer peripheries 10a of the upper and lower chimney units 10U and 10L with the contact 10b as the center. However, the cylindrical connecting member 25 is easily contracted following this. Further, on the separation side 10c where the upper and lower chimney units 10 are separated from each other by locking, on the opposite side to the contact side 10b with respect to the central axis C of the chimney unit 10, the tubular connecting member 25 follows this separation. Easily stretches. In this way, the tubular connecting member 25 expands and contracts and functions as a deformation absorbing material that absorbs interlayer deformation between the upper and lower chimney units 10, and therefore follows the interlayer deformation between the chimney units 10, and damages the chimney. Can be suppressed.

Here, the chimney connection member 13 connected to the chimney main body 6 is screwed to the chimney support beam 4 fixed to the building 1 with the fixing bolt 60 covered with the sheath pipe 65, and can be separated from and connected to each other. Therefore, when bending deformation occurs in the chimney main body 6 when an earthquake occurs, the chimney connecting member 13 is separated from the chimney support beam 4 along with the inclination of the chimney unit 10 as described above. The deformation of the chimney main body 6 can be followed.
Further, the chimney connecting member 13 is provided with a position adjustment plate 64 in the lower plate 32 and integrated with the lower plate 32 by welding so that the sheath pipe 65 penetrates the hole 64a formed in the position adjustment plate 64. The followability of the chimney main body 6 is ensured by allowing the chimney connecting member 13 to move along the sheath tube 65.

Further, as shown in FIG. 4, the compression support member 14 is disposed so that the chimney unit connection member 12 is in contact with the outer surface 14 a, and moreover, from the outer periphery 10 a of the upper chimney unit 10 U of the compression support member 14. In the non-compression portion 14b projecting to the outside O, the upper surface is higher than the lower end portion 10e of the upper chimney unit 10U, so the upper chimney unit 10U and the compression support member 14 are constrained in the horizontal direction. Thereby, when an interlayer deformation occurs in the building 1 due to the earthquake, the relative movement in the horizontal direction of the upper chimney unit 10U with respect to the lower chimney unit 10L, that is, lateral displacement is suppressed, and the upper chimney unit 10U is It can be guided to a rocking movement.
Here, the upper chimney unit 10U is locked, and as described with reference to FIG. 7, the upper chimney unit 10U and the lower chimney unit 10L are separated from each other on the separation side 10c, and a gap is formed between the chimney units 10. Even if it occurs, the connecting portion of the upper chimney unit 10U and the lower chimney unit 10L is intimately joined to each other, the steel plate 23 of the chimney unit 10, the first fixed hardware 26, the second fixed hardware 27, and Surrounded by the cylindrical connecting member 25.
In addition, after the earthquake has stopped, the chimney main body 6 is restored to the attached state before the occurrence of the earthquake.
Thereby, smoke leakage from the gap between the upper and lower chimney units can be suppressed.

  Further, since the compression support member 14 is formed in a frame shape or an annular shape protruding outward from the outer periphery 10a of the chimney unit 10, it can reliably support the upper chimney unit 10U, and The load of the upper chimney unit 10U can be reliably transmitted to the lower chimney unit 10L.

Next, the outline | summary is demonstrated about the element experiment result of the intensity | strength of said chimney structure 5, and a deformation | transformation performance.
First, the strength of the chimney unit connecting member 12 and the chimney connecting member 13 was confirmed by the force test apparatus 40 shown in FIG.
In the force test apparatus 40, two chimney units 10A and 10B are placed sideways so as to straddle a plurality of casters 41 (41A, 41B, 41C) with casters, and the lower end of the chimney unit 10A. The chimney unit connecting member 12 connects the part 10e and the upper end part 10d of the chimney unit 10B. Further, a hydraulic jack 43 is provided at the upper end 10d of the chimney unit 10A, and the chimney connection member 13 of the chimney unit 10A is fixed by the fixing device 42.
In this state, after applying a vertical load equivalent to the case where the chimney unit 10 is actually provided in the building 1 in the axial direction C by the hydraulic jack 43, the deformation modes of the chimney unit connecting member 12 and the chimney connecting member 13 are observed. The maximum amount of deformation was measured.
In addition, assuming a horizontal force in the event of an earthquake that acts on the chimney unit 10 actually provided in the building 1, the hydraulic jack 43 is weighted evenly in the axial direction C from above the chimney unit 10 </ b> A. Weighting was performed, and the deformation modes of the chimney unit connecting member 12 and the chimney connecting member 13 were observed.
Further, in order to verify the proof strength when the chimney unit 10A is locked due to an earthquake, a liner material is interposed between the loading platforms 41B and 41C that support the chimney unit 10B and the chimney unit 10B, and the chimney unit 10B is inserted into the chimney unit 10B. By positioning the chimney unit 10A higher than 10A, the chimney unit 10A is tilted with respect to the chimney unit 10B. In this state, the hydraulic jack 43 is used to apply force, and the deformation modes of the chimney unit connecting member 12 and the chimney connecting member 13 are observed. .
As described above, the chimney main body is designed to have the predetermined deformation followability and restoring force based on the element test results of the bonding strength and the deformation performance for the chimney unit 10 and the chimney unit connecting member 12. confirmed.

In addition, an experiment for confirming the deformation elasticity of the chimney unit connecting member 12, particularly the cylindrical connecting member 25, as will be described below, is performed.
In this experiment, the cylindrical connecting member 25 is placed on a horizontal plane, a load is applied from above, the amount of deformation in the vertical direction is observed, the load is then unloaded, and the amount of deformation after unloading is observed.
In addition, with the cylindrical connecting member 25 placed on a horizontal plane, with the lower end fixed, a horizontal load is applied to the upper end with a hydraulic jack, the amount of horizontal deformation is observed, and then the unloading is performed. Observe deformation after unloading.
The above experiment was actually performed on the cylindrical connecting member 25 in the first embodiment, and it was confirmed that it had sufficient performance.

(Modification of the first embodiment)
Next, the modification of the chimney structure 5 shown as the said 1st Embodiment is demonstrated using FIG. FIG. 10 is a cross-sectional view of a connecting portion between the chimney units 10 in the chimney structure of the present modification. The chimney structure of this modification is different from the chimney structure 5 in the first embodiment in the cross-sectional shape of the cylindrical connecting member 50.

As shown in FIG. 10, the cylindrical connecting member 50 has a height direction of the cylindrical connecting member 50 when viewed in a cross-section so as to be orthogonal to the extending direction of the cylindrical connecting member 50, that is, the circumferential direction. That is, in the axial direction C of the chimney unit 10, a substantially central portion has a shape that protrudes outward in the radial direction O.
When this protruding end is the outer end portion 50a, the cylindrical connecting member 50 has an upper curved portion 50b, a lower curved portion 50c, an upper vertical portion 50f, and a lower vertical portion when viewed in cross section as shown in FIG. A portion 50g, an upper flange 50j, and a lower flange 50k are provided.
The upper curved portion 50b is formed to bend toward the inner side I while extending upward from the outer end portion 50a. The lower curved portion 50c is formed to bend toward the inner side I while extending downward from the outer end portion 50a.
Thereby, the cylindrical connection material 50 is formed so that the extending direction, that is, the cross section orthogonal to the circumferential direction is U-shaped.

Similar to the first embodiment, the upper vertical portion 50f and the lower vertical portion 50g are curved upward on each of the upper inner end portion 50d of the upper curved portion 50b and the lower inner end portion 50e of the lower curved portion 50c. It is provided so as to be perpendicular to the portion 50b and the lower curved portion 50c.
Similarly to the first embodiment, the upper flange 50j and the lower flange 50k are also provided at the upper end portion 50h of the upper vertical portion 50f and the lower end portion 50i of the lower vertical portion 50g, respectively.
As in the first embodiment, the cylindrical connecting member 50 is configured such that the upper flange 50j and the lower flange 50k are joined to the first fixed hardware 26 and the second fixed hardware 27, respectively. The unit 10U and the lower chimney unit 10L are connected.

Also in the cylindrical connecting member 50, like the cylindrical connecting member 25 in the first embodiment, the upper curved portion 50b and the lower curved portion 50c are expanded or contracted in the direction in which the upper curved portion 50b and the lower curved portion 50c are expanded around the outer end portion 50a. By doing so, high deformation followability is realized.
Therefore, as described in the first embodiment with reference to FIG. 7, when the upper chimney unit 10U is locked, the contact side 10b has the upper curved portion 50b and the lower curved portion around the outer end portion 50a. The portion 50c contracts so as to close, and on the separation side 10c, the upper curved portion 50b and the lower curved portion 50c are extended so as to open around the outer end portion 50a, and follow the locking of the upper chimney unit 10U. To do.
It goes without saying that this modification has the same effects as those of the first embodiment.

(Second Embodiment)
Next, the chimney structure 75 shown as 2nd Embodiment is demonstrated using FIGS. Fig.11 (a) is a plane sectional view of the chimney structure 75 in 2nd Embodiment, FIG.11 (b) is a side view. 11A is a cross-sectional view taken along the line JJ in FIG. 11B, and FIG. 11B is a cross-sectional view taken along the line H-H in FIG. FIG. 12 is an enlarged perspective view of a portion indicated by an arrow K in FIG. FIG. 13 is a cross-sectional view of a portion LL in FIG. The chimney structure 75 in the second embodiment is different from the chimney structure 5 in the first embodiment in that the chimney structure 75 is installed inside the building, and the chimney connection member 83 is not a chimney support beam but a slab structure. The difference is that it is connected to the body 74.

In each building shown in FIG. 11, a space S surrounded by walls 72 on all sides is provided in the building so as to communicate in the vertical direction over a plurality of levels. The chimney main body 6 of the chimney structure 75 is provided in the space S so as to extend in the vertical direction.
As in the first embodiment, the chimney main body 6 is configured by connecting a plurality of chimney units 10 in the vertical direction with the chimney unit connecting member 12 interposed therebetween.
In addition, the chimney unit connecting member 12 also fixes the tubular connecting member 25 formed in an annular shape so that the cross section has a square shape and the tubular connecting member 25 to the chimney unit 10 as in the first embodiment. First and second fixed hardware (fixed hardware) 26 and 27 are provided.
In the space S, the slab structure 74 is provided so as to protrude from the wall 72 toward the chimney main body 6 in the horizontal direction.
The chimney structure 75 includes a chimney connection member 83 that connects the chimney main body 6 and the slab structure 74. The chimney connection member 83 is joined to the vicinity of the upper end of each chimney unit 10 so as to protrude in the radial direction from the outer periphery of the chimney unit 10. The chimney connection members 83 are provided so as to be separated from each other at an angle of 90 ° in the circumferential direction around the axis C of the chimney unit 10, and each is connected to the slab structure 74.

The chimney connection member 83 includes two side plates 30, an upper plate 31, and a lower plate 92. The side plate 30 and the upper plate 31 are formed in the same manner as in the first embodiment. However, unlike the lower plate 32 of the first embodiment, the lower plate 92 has one hole 92a. .
Similar to the first embodiment, the chimney connection member 83 is joined to the chimney unit 10 by welding and a fixing member 33 provided along the side plate 30.

Anchor bars 90 are provided on the slab structure 74. As shown in FIG. 13, the anchor bar 90 is provided such that the lower end 90 b is embedded in the slab structure 74 and the upper end 90 a protrudes upward from the upper surface 74 d of the slab structure 74. A sheath tube 65 having an inner diameter substantially equal to the outer diameter of the anchor muscle 90 is inserted into a portion protruding upward of the anchor muscle 90, and the anchor muscle 90 is inserted into the inside of the upper surface 74 d of the slab structure 74. It is provided so as to be covered with the anchor muscle 90 so as to be placed on.
A hole 92 a is formed in the lower plate 92 of the chimney connection member 83. The chimney connection member 83 is positioned so that the anchor muscle 90 and the sheath pipe 65 are inserted into the hole 92 a and is installed on the upper surface 74 d of the slab structure 74, and the chimney connection member 83 is slab structured along the sheath pipe 65. It is provided so as to be separable upward from the body 74.
A circular position adjusting plate 64 having an outer diameter larger than the diameter of the hole 92a is positioned on the upper surface 92b of the lower plate 92 of the chimney connection member 83 so that the outer shape of the position adjusting plate 64 covers the hole 92a. Are joined by welding. The position adjusting plate 64 is provided with a hole 64a having a diameter larger than the outer diameter of the sheath tube 65, and the anchor muscle 90 and the sheath tube 65 are inserted into the hole 64a.
Thus, when each member is positioned, the length of the sheath tube 65 is determined so that a certain distance is provided between the upper surface 64b of the position adjusting plate 64 and the upper end 65a of the sheath tube 65. Yes.
A locking nut 66 is screwed onto the anchor bar 90 from above, and is tightened so that the sheath pipe 65 is firmly sandwiched and fixed by the slab structure 74 and the locking nut 66.

Also in the chimney structure 75 of the second embodiment, similarly to the first embodiment, the connection part between the chimney units 10 and the joint part between the chimney connection member 83 and the building structure, that is, the slab structure 74, respectively. By providing the deformation follow-up means, it has a high follow-up property to the building deformation at the time of the earthquake occurrence, and has a restoring force to return to the original joined state after the earthquake is stopped.
Further, in the chimney structure 75 of the second embodiment arranged inside the building, the chimney connection member 83 is connected to the chimney main body 6, and the chimney connection member 83 is fixed to the slab structure 74, so the first embodiment. The chimney support beam 4 is unnecessary.

The chimney structure of the present invention is not limited to the above-described embodiments and modifications described with reference to the drawings, and various other modifications can be considered within the technical scope thereof.
For example, in each of the above-described embodiments and modifications, the chimney unit 10 has a circular cross-sectional shape orthogonal to the axial direction C. However, the present invention is not limited to this, and may have another shape such as a rectangle. Absent.
Moreover, in 1st Embodiment and a modification, the chimney support beam 4 may not be a steel frame steel material but RC structure. In this case, the chimney connection member 13 may be joined to the RC chimney support beam not by the fixing bolt 60 but by an anchor bar as described in the second embodiment.
In the first embodiment, two chimney support beams 4 are installed across the chimney unit 10. However, only one of the chimney support beams 4 may be provided as long as the chimney connection member 13 attached to the chimney unit 10 can be fixed to the building body. And when installing two, it does not need to be provided substantially in parallel.
In the second embodiment, four chimney connection members 83 are provided for each chimney unit 10, and the chimney unit 10 and the slab structure 74 are connected. However, the number of the chimney connection members 83 is the same. The number is not limited to four, and the number may be less than four or more than four.
In each of the above-described embodiments and modifications, the cylindrical connecting members 25 and 50 have the inclined portions 25b and 25c or the curved portions 50b and 50c substantially in the cross-sectional view with the outer end portions 25a and 50a as a starting point. The shape extends in the same direction, that is, the inner side I, but is not limited thereto, and may have a shape that extends toward the outer side O with the end portion as a base point.
Further, in the second embodiment, as the cylindrical connecting member 25, as in the first embodiment, the one formed in an annular shape so that the cross section has a square shape is used. Needless to say, as in the modification of the first embodiment, a cylindrical connecting member 50 formed in an annular shape so that the cross section has a U-shape may be used.
In addition to this, the configurations described in the above embodiments and modifications can be selected or changed to other configurations as appropriate without departing from the gist of the present invention.

1 Building 25, 50 Cylindrical connecting material 4 Chimney support beam 26 First fixed hardware (fixed hardware)
4d Upper surface 27 Second fixed hardware (fixed hardware)
5, 75 Chimney structure 60 Fixing bolt 6 Chimney body 60a Shaft 10 Chimney unit 65 Sheath tube 10L Lower chimney unit (chimney unit) 74 Slab structure 10U Upper chimney unit (chimney unit) 74d Upper surface 12 Chimney unit connection member 32a, 92a Hole 13, 83 Chimney connection member 90 Anchor muscle

Claims (3)

A chimney structure attached to a building,
A chimney body in which a plurality of chimney units are connected in the vertical direction with a chimney unit connecting member interposed therebetween,
A chimney support beam fixed to the building;
A chimney connection member for connecting the chimney main body and the chimney support beam,
The chimney unit connecting member includes a cylindrical connecting material formed in an annular shape so that the cross section has a U-shape or a U-shape, and a fixed hardware for fixing the cylindrical connecting material to the chimney unit. Chimney structure characterized by being made. A fixing bolt is provided on the upper surface of the chimney support beam so that the shaft portion protrudes upward,
The shaft portion of the fixing bolt is covered with a sheath tube,
The chimney connection member is installed on the upper surface of the chimney support beam through which the sheath tube is inserted into the hole formed therein, and the chimney connection member is separated upward from the chimney support beam along the sheath tube. The chimney structure according to claim 1, wherein the chimney structure can be contacted. A chimney structure installed inside the building,
A chimney body in which a plurality of chimney units are connected in the vertical direction with a chimney unit connecting member interposed therebetween,
A chimney connection member for connecting the slab structure inside the building and the chimney main body,
The chimney unit connecting member includes a cylindrical connecting material formed in an annular shape so that the cross section has a U-shape or a U-shape, and a fixed hardware for fixing the cylindrical connecting material to the chimney unit. And
Anchor bars are provided on the upper surface of the slab structure so as to protrude upward,
The anchor muscle is covered with a sheath tube,
The chimney connection member is installed on the upper surface of the slab structure with the sheath pipe inserted through a hole formed therein, and the chimney connection member is separated upward from the slab structure along the sheath pipe. A chimney structure characterized by being able to contact.

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