JP7660458B2 - Chimney unit spacing jig and building chimney construction method - Google Patents

Description

The present invention relates to a jig for constructing a chimney for a building and a method for constructing a chimney for a building using said jig, and in particular to a chimney unit spacing jig that is provided between chimney units stacked vertically, and a method for constructing a chimney for a building.

For example, the chimney for a building described in Patent Document 1 is divided into multiple chimney units. These chimney units are stacked vertically within the chimney atrium section of the building. An arm protrudes from the upper part of each chimney unit and is connected to a support base of the building frame. This allows each chimney unit to be suspended and supported by the building frame. Therefore, most of the load of each chimney unit is borne by the building frame, and is not borne by the chimney units below it. A sealing member is provided between two chimney units adjacent vertically.

Patent Document 2 describes a method for constructing this type of chimney for a building. Specifically, when stacking the upper chimney unit on top of the lower chimney unit, a long fully threaded bolt is attached in advance so that it extends vertically downward from the upper chimney unit. The upper chimney unit is hung by a crane and positioned directly above the lower chimney unit, and the fully threaded bolt is connected to the lower chimney unit with a nut. The height of the upper chimney unit is finely adjusted with the fully threaded bolt and nut so that the distance between the upper and lower chimney units and the thickness of the sealing material sandwiched between these chimney units are specified. While maintaining that height, the upper chimney unit is connected to the building frame. The fully threaded bolt and nut are then removed.

JP 2016-056633 A JP 2021-063347 A

In the construction method described in Patent Document 2, the load of the upper chimney unit acts in the axial direction on the long fully threaded bolts until the building frame bears the load, which may cause the fully threaded bolts to deform and break. In view of this situation, the present invention aims to provide a chimney unit spacing jig that can adequately withstand the load of the upper chimney unit, and a chimney construction method using said jig.

In order to solve the above problems, the present invention provides a chimney unit spacing jig that is provided between adjacent upper and lower chimney units in the construction of a chimney for a building, in which a plurality of chimney units having a rectangular cross section are stacked and each chimney unit is suspended from a building framework, the jig comprising:
A jig body formed into a pair of upper and lower L-shaped planar cross sections, stacked inside and outside so as to be able to adjust the relative height of each other, and installed at the upper end corner portion of the lower chimney unit;
a pressure contact means capable of pressing the pair of jig bodies together and releasing the pressure contact;
The present invention is characterized by comprising:

When the chimney unit spacing jig is installed at the upper corner of the lower chimney unit and the upper chimney unit is hung down, the lower end of the upper chimney unit abuts against the upper jig body.
By releasing the pressure from the pressure means, the relative height of the pair of jig bodies can be adjusted, and the height of the chimney unit spacing jig can be adjusted. This makes it possible to adjust the spacing between the upper and lower chimney units, and thus adjust the thickness of the seal material between these chimney units, and therefore the degree of compression.
The pressure welding by the pressure welding means creates a strong frictional force between the pair of jig bodies, preventing relative height adjustment. This allows the spacing between the upper chimney unit and the lower chimney unit to be maintained. The upper chimney unit is not supported by the axial force of a vertical bolt, and sufficient load resistance can be obtained.

A vertically extending long hole is formed in one of the pair of jig bodies,
It is preferable that the pressure contact means includes a bolt that is engaged with or fixed to the other jig body and passed through the long hole, and a nut that is screwed onto the bolt.
By loosening the bolts and nuts, the pressure can be released and the bolts can be relatively displaced up and down along the long holes, allowing adjustment of the relative heights of the pair of jig bodies.
By tightening the bolts and nuts, the pair of jig bodies are pressed against each other, preventing adjustment of the relative heights.

It is preferable that each of the pair of jig bodies has a pair of splice portions perpendicular to each other, and the splice portions of the pair of jig bodies facing the same direction are overlapped and pressed together by the pressing means.
The chimney unit spacing jig can be positioned with respect to the lower-stage chimney unit by applying a pair of right-angled splice parts of each jig body to the upper corner parts. By pressing the splice parts facing one direction of the pair of jig bodies against each other and the splice parts perpendicular to the one direction against each other, the friction between the pair of jig bodies can be further increased, and the load-bearing capacity of the chimney unit spacing jig can be reliably ensured.

The method of the present invention is a method for constructing a chimney for a building using the chimney unit spacing retaining jig, comprising the steps of:
A step of placing the chimney unit spacing jig on a flange horizontally protruding from an upper end of the lower chimney unit so as to fit the upper end corner portion;
adjusting the height of the upper jig body relative to the lower jig body;
a step of pressing the upper and lower jig bodies after the height adjustment against each other by the pressing means;
A step of abutting the upper chimney unit against an upper end of the upper jig body;
The present invention is characterized by comprising:
This allows the distance between the upper and lower chimney units, and therefore the compression of the seal between these chimney units, to be adjusted as desired. The load of the upper chimney unit can be supported by the frictional force caused by the pressure contact between the pair of jig bodies. The upper chimney unit is not supported by the axial force of the vertical bolts, and sufficient load resistance is obtained.

It is preferable that after the upper chimney unit is connected to the building structure in the pressure-welded and abutted state so that it can be suspended, the pressure is released and the chimney unit spacing jig is removed.
The removed chimney unit spacing jig can be used to maintain spacing between new chimney units.
The height of the chimney unit spacing jig can be adjusted to match the desired spacing between the new chimney units.

The present invention provides a chimney unit spacing jig that can adequately withstand the load of the upper chimney unit and a chimney construction method using the jig.

FIG. 1 is a front view showing the process of constructing a chimney for a building using a chimney unit spacing retaining jig according to one embodiment of the present invention, showing the state in which an upper chimney unit is about to be installed after the lower chimney unit has been installed. FIG. 2 is a plan view taken along the line II-II in FIG. FIG. 3 is a perspective view of the chimney unit spacing retaining jig. FIG. 4 is an enlarged front view of the circle IV in FIG. FIG. 5 is a plan sectional view taken along line VV in FIG. FIG. 6 is a front view showing the construction of the chimney for a building with the upper chimney unit installed. FIG. 7 is a front cross-sectional view taken along line VII-VII in FIG. 5 with the upper chimney unit installed.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
As shown in Figures 1 and 6, a chimney open-air section 12 is provided in the building structure 11 of a building 10, and a building chimney 20 is constructed in the section 12. The building chimney 20 is divided into a plurality of chimney units 21, 22 (only two are shown in the figure). As shown in Figure 2, each of the chimney units 21, 22 is formed in a rectangular cylindrical shape in a plan view. As shown in Figure 6, these chimney units 21, 22 are stacked one on top of the other. An arm 23 protrudes from the upper side of each of the chimney units 21, 22 and is connected to the support base 13 of the building structure 11. As a result, each of the chimney units 21, 22 is suspended and supported by the building structure 11, and most of the load is applied to the building structure 11.

As shown in Fig. 1, of the two chimney units adjacent vertically in the building chimney 20, an insertion portion 22b is provided at the upper end of the lower chimney unit 22. As shown in Fig. 6, the lower end of the upper chimney unit 21 is inserted into the insertion portion 22b.
Of course, whether it is an upper chimney unit or a lower chimney unit is relative, and each chimney unit is an upper chimney unit in relation to the chimney unit immediately below, and a lower chimney unit in relation to the chimney unit immediately above.

As shown in FIG. 1, a packing 24a is provided on the lower end surface of the insulating wall 21a of the upper chimney unit 21. A packing 24b is provided on the upper end surface of the insulating wall 22a of the lower chimney unit 22. As shown in FIG. 7, these packings 24a, 24b are overlapped to form the sealing member 24 between the chimney units 21, 22. By adjusting the gap between the chimney units 21, 22 to a predetermined value, the thickness of the sealing member 24, and therefore the degree of compression, can be adjusted to the desired size.

As shown in Figure 1, a chimney unit spacing jig 9 is used during construction of a building chimney 20 to adjust the spacing between the chimney units 21 and 22. As shown in Figure 2, a chimney unit spacing jig 9 is installed at each of the four corners between the chimney units 21 and 22.

As shown in Figures 3 to 5, the chimney unit spacing jig 9 comprises a pair of upper and lower jig bodies 30, 40 and a pressure contact means 50. The jig bodies 30, 40 are each formed with an L-shaped planar cross section and are stacked inside and outside each other so that their relative heights can be adjusted.

More specifically, the upper (one) jig body 30 has an angle member 31 with an L-shaped cross section in a plan view, and a top plate portion 33. The angle member 31 includes a pair of splice portions 32 that are perpendicular to each other. Each splice portion 32 has a long hole 34 that extends vertically. The top plate portion 33 is formed as an L-shaped flat plate in a plan view, and spans the upper ends of the pair of splice portions 32 of the angle member 31. The angle member 31 and the top plate portion 33 are joined by welding or the like.

The lower (other) jig body 40 has an angle member 41 that is L-shaped in a plan view, and a base plate portion 43. The angle member 41 includes a pair of splice portions 42 that are perpendicular to each other. Each splice portion 42 has a circular insertion hole 13 formed therein. The base plate portion 43 is formed in an L-shaped flat plate in a plan view, and straddles the lower ends of the pair of splice portions 42 of the angle member 41. The angle member 41 and the base plate portion 43 are joined by welding or the like.
The jig bodies 30, 40 are made of a metal such as steel or iron.

The outer side of each splice plate portion 42 of the lower jig body 40 is overlapped with the splice plate portion 32 of the upper jig body 30 in the same orientation. The long holes 34 and the insertion holes 44 of the overlapped splice plate portions 32, 42 are connected.

As shown in Figures 3 to 5, the pressure contact means 50 has two sets of bolts 51 and nuts 52 that are perpendicular to each other. One set of bolts 51 and nuts 52 is provided for each of the overlapping splice plate parts 32, 42. The bolts 51 are passed through the insertion holes 44 and the long holes 34 from the inner surface side of the corresponding splice plate part 41. The heads 51a of the bolts 51 are abutted against the inner surface of the splice plate part 41, so that the bolts 51 are engaged with the jig body 40. A nut 52 is screwed into the part of the bolt 51 that protrudes outward from the long hole 34 via a washer 53.

When the nut 52 is loosened, the bolt 51 can be displaced vertically along the long hole 34, allowing the relative height adjustment of the upper and lower jig bodies 30, 40. By tightening the nut 52, the splice plate portions 31, 41 are strongly pressed against each other, preventing the relative height adjustment of the upper and lower jig bodies 30, 40.

The building chimney 20 is constructed as follows.
Preferably, the chimney unit spacing jig 9 is preassembled.
<Jig installation process>
As shown in Fig. 1 and Fig. 2, after the lower chimney unit 22 is erected, the chimney unit spacing jig 9 is installed at the upper corners 22c of the four corners. More specifically, as shown in Fig. 4, the chimney unit spacing jig 9 is placed on the flange 22f protruding horizontally from the upper end of the lower chimney unit 22 so that it faces the upper corners 22c of the lower chimney unit 22. As shown in Fig. 5, preferably, the two inner end faces 43c of the base plate 43 that form a right angle are abutted against two side faces that form a right angle at the corners 22c of the lower chimney unit 22. This allows the chimney unit spacing jig 9 to be positioned relative to the lower chimney unit 22. Preferably, when the base plate 43 is abutted against the corners 22c, the bolt heads 51a are slightly separated from the lower chimney unit 22.

<Upper chimney unit lifting process>
1 and 6, before or after the installation process of the chimney unit spacing jig 9, the upper-stage chimney unit 21 is suspended by a hoisting means (not shown) such as a crane, positioned above the lower-stage chimney unit 22, and lowered to a predetermined height, whereby the lower end of the upper-stage chimney unit 21 is inserted into the insertion portion 22b at the upper end of the lower-stage chimney unit 22. By positioning the upper-stage chimney unit 21 at the predetermined height, the spacing between the chimney units 30, 40 becomes a predetermined size.

<Jig height adjustment process>
Next, the height of each chimney unit spacing jig 9 is adjusted while the upper chimney unit 21 is suspended and supported at a predetermined height by the hoisting means such as the crane. That is, with the bolts 51 and nuts 52 slightly loosened, the upper jig body 30 is raised and lowered relative to the lower jig body 40. As a result, the top plate portion 33 is abutted against the lower flange 21f protruding from the upper chimney unit 21, as shown in Fig. 7. In this state, the bolts 51 and nuts 52 are tightened. As a result, the splice portions 31, 41 of the jig bodies 30, 40 are strongly pressed against each other, and the height of the chimney unit spacing jig 9 is fixed.

<Step of releasing the hanging means>
Thereafter, the lifting means such as the crane is removed, so that the weight of the upper chimney unit 21 is applied to the chimney unit spacing maintaining jig 9 via the flange 21f. The spacing between the chimney units 30, 40 is maintained at a predetermined size.
The chimney unit spacing jig 9 can bear the load of the upper chimney unit 21 by friction caused by the pressure contact between the splice plates 31, 41. While a tightening torque acts on the bolts 51, the load of the upper chimney unit 21 does not act in the axial direction of the bolts 51. Therefore, deformation and destruction of the bolts 51 can be avoided.

<Upper chimney unit connection process>
6, an arm 23 is attached to the upper chimney unit 21, and the arm 23 is connected to the support base 13. This makes it possible for the upper chimney unit 21 to be supported in a suspended state by the building framework 11.
<Jig removal process>
Thereafter, the chimney unit spacing jig 9 is removed. More specifically, the nut 52 is turned in the loosening direction to release the pressure contact between the splice plate parts 31, 41. This causes the upper jig body 30 to descend, lowering the height of the chimney unit spacing jig 9, allowing the chimney unit spacing jig 9 to be easily removed from between the upper and lower flanges 21f, 22f.
After the chimney unit spacing retaining jig 9 is removed, most of the load of the upper chimney unit 21 is transferred to the building structure 11 via the arm 23 and the support base 13.

In the same manner, a chimney unit in an upper stage is further stacked above the chimney unit 21. The chimney unit spacing jig 9 is reused to adjust the spacing between these chimney units.
In the building chimney 20 constructed in this manner, the distance between the upper and lower chimney units 21, 22 is set to a predetermined size, so that the thickness of the sealing member 24 and therefore the degree of compression can be set to a predetermined size, thereby ensuring airtightness between the chimney units.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the upper jig body 30 may be disposed on the inner surface side of the lower jig body 40 .
The upper jig body 30 may have an insertion hole 44 for the bolt 51 , and the lower jig body 40 may have an elongated hole 34 .
The bolt 51 may be fixed to one of the jig bodies by welding, etc. The long hole formed in the other jig body may reach either the upper or lower end face of the other jig body.
The construction procedure of the building chimney 20 can be changed as appropriate. The height adjustment of the chimney unit spacing jig 9 may be performed before the jig 9 is installed at the corner portion 22c, before the upper chimney unit 21 is suspended down to a predetermined height, or in parallel with placing the upper chimney unit 21 at a predetermined height. After the upper chimney unit 1 and the support base 13 are connected via the arm 23, the lifting means such as a crane may be removed from the upper chimney unit 21.

The present invention can be applied, for example, to the construction of chimneys for buildings.

Description of the Reference Signs 9 Chimney unit spacing jig 10 Building 11 Building framework 20 Building chimney 21 Upper chimney unit 22 Lower chimney unit 22b Insertion portion 22c Upper corner portion 22f Flange 23 Arm 24 Sealing member 30 Upper jig body 32 Splice plate portion 33 Top plate portion 34 Slot 40 Lower jig body 42 Splice plate portion 43 Base plate portion 44 Insertion hole 50 Pressing means 51 Bolt 52 Nut

Claims (5)

A chimney unit spacing jig that is provided between adjacent upper and lower chimney units in constructing a chimney for a building, in which a plurality of chimney units having a rectangular cross section are stacked and each chimney unit is suspended from a building framework,
A jig body formed into a pair of upper and lower L-shaped planar cross sections, stacked inside and outside so as to be able to adjust the relative height of each other, and installed at the upper end corner portion of the lower chimney unit;
a pressure contact means capable of pressing the pair of jig bodies together and releasing the pressure contact;
A chimney unit spacing maintaining jig comprising: A vertically extending long hole is formed in one of the pair of jig bodies,
2. The chimney unit spacing maintaining jig as described in claim 1, characterized in that the pressure contact means includes a bolt that is engaged or fixed to the other jig body and passed through the long hole, and a nut screwed onto the bolt. The chimney unit spacing jig according to claim 1 or 2, characterized in that each of the pair of jig bodies has a pair of splice parts that are perpendicular to each other, and the splice parts of the pair of jig bodies that face in the same direction are overlapped and pressed together by the pressing means. A method for constructing a chimney for a building using the chimney unit spacing jig according to any one of claims 1 to 3,
A step of placing the chimney unit spacing jig on a flange horizontally protruding from an upper end of the lower chimney unit so as to fit the upper end corner portion;
adjusting a height of an upper jig body relative to a lower jig body of the pair of upper and lower jig bodies;
a step of pressing the upper and lower jig bodies after the height adjustment against each other by the pressing means;
A step of abutting the upper chimney unit against an upper end of the upper jig body;
A method for constructing a chimney for a building comprising: The method for constructing a chimney for a building according to claim 4, characterized in that after the upper chimney unit is connected to the building structure in such a manner that it can be suspended while being pressed against the building structure and butted against the building structure, the pressing is released and the chimney unit spacing jig is removed.

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