Chimney unit spacing jig and building chimney construction method

Abstract

To provide a chimney unit space holding jig that can sufficiently withstand the weight of an upper stage chimney unit and a chimney construction method using the jig.SOLUTION: Multiple chimney units 21, 22 with rectangular cross section is stacked and each chimney unit 21, 22 is suspended on a building skeleton 11. In doing so, a chimney unit space holding jig 9 is provided between the adjacent upper stage chimney unit 21 and lower stage chimney unit 22. A pair of jig bodies 30, 40 having an L-shaped cross section of the jig 9 are placed on top of each other and placed on a flange 22f so as to fix it to an upper end corner 22c of the lower stage chimney unit 22. After adjusting the height of the upper jig body 40 in relation to the lower jig body 40, the jig bodies 30, 40 are pressed together by means of pressure welding means 50. The upper stage chimney unit 21 is butted against the upper end of the upper jig body 30.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] 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 maintaining jig provided between chimney units stacked vertically and a method for constructing a chimney for a building. [Background technology]

[0002] 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 side of each chimney unit and is connected to a support base of the building frame. This allows each chimney unit to be suspended from the building frame. Therefore, most of the load of each chimney unit is borne by the building frame, and is not borne by any chimney units below it. A sealing member is provided between two chimney units adjacent vertically.

[0003] Patent Document 2 describes a method for constructing this type of chimney for a building. Specifically, when stacking an upper chimney unit on a 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 placed 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 predetermined. While maintaining that height, the upper chimney unit is connected to the building frame. The fully threaded bolt and nut are then removed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-056633 A [Patent Document 2] Patent Publication No. 2021-063347 Summary of the Invention [Problem to be solved by the invention]

[0005] In the construction method described in the above-mentioned Patent Document 2, until the building frame bears the load of the upper chimney unit, the load acts in an axial direction on the long fully threaded bolts, which may cause the fully threaded bolts to deform and break. In view of the above circumstances, 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. [Means for solving the problem]

[0006] 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 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:

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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. Effect of the Invention

[0012] According to the present invention, it is possible to provide a chimney unit spacing maintaining jig that can adequately withstand the load of an upper chimney unit, and a chimney construction method using said jig. [Brief description of the drawings]

[0013] [Figure 1] 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. [Diagram 2] FIG. 2 is a plan view taken along line II-II in FIG. [Diagram 3] FIG. 3 is a perspective view of the chimney unit spacing retaining jig. [Figure 4] FIG. 4 is an enlarged front view of the circle IV in FIG. [Diagram 5] FIG. 5 is a plan cross-sectional view taken along line VV in FIG. [Figure 6] FIG. 6 is a front view showing the construction of the chimney for a building with the upper chimney unit installed. [Figure 7] FIG. 7 is a front cross-sectional view taken along line VII-VII in FIG. 5 with the upper chimney unit installed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, one embodiment of the present invention will be described with reference to the drawings. As shown in Figs. 1 and 6, a chimney atrium section 12 is provided in a 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 Fig. 2, each of the chimney units 21, 22 is formed in a rectangular tubular shape in a plan view. As shown in Fig. 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.

[0015] As shown in Fig. 1, of the two chimney units adjacent to each other in the vertical direction 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.

[0016] 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 a seal 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 seal member 24, and therefore the degree of compression, can be adjusted to the desired size.

[0017] As shown in Fig. 1, a chimney unit spacing jig 9 is used in constructing a building chimney 20 to adjust the spacing between the chimney units 21, 22. As shown in Fig. 2, a chimney unit spacing jig 9 is installed at each of the four corners between the chimney units 21, 22.

[0018] 3 to 5, the chimney unit spacing jig 9 includes a pair of upper and lower jig bodies 30, 40, and a pressure welding means 50. The jig bodies 30, 40 are each formed into an L-shaped planar cross section, and are stacked inside and outside each other so that their relative heights can be adjusted.

[0019] More specifically, the upper (one) jig body 30 has an angle member 31 having an L-shaped cross section in a plan view, and a top plate portion 33. The angle member 31 includes a pair of splice plate portions 32 that are perpendicular to each other. Each splice plate portion 32 has a long hole 34 that extends vertically. The top plate portion 33 is formed in an L-shaped flat plate in a plan view, and spans the upper ends of the pair of splice plate portions 32 of the angle member 31. The angle member 31 and the top plate portion 33 are joined by welding or the like.

[0020] 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 plate portions 42 that are perpendicular to each other. Each splice plate portion 42 has a circular insertion hole 13 formed therein. The base plate portion 43 is formed in a flat plate shape that is L-shaped in a plan view, and spans the lower ends of the pair of splice plate 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.

[0021] The splice plate portions 32 of the upper jig body 30 are overlapped on the outer sides of the splice plate portions 42 of the lower jig body 40 in the same orientation. The long holes 34 and the through holes 44 of the overlapped splice plate portions 32, 42 communicate with each other.

[0022] As shown in Figs. 3 to 5, the pressure welding 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 elongated 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, whereby the bolts 51 are engaged with the jig body 40. A nut 52 is screwed, via a washer 53, into the portion of the bolt 51 that protrudes outward from the elongated hole 34.

[0023] With the nut 52 loosened, the bolt 51 can be relatively displaced up and down along the long hole 34, allowing adjustment of the relative heights 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 adjustment of the relative heights of the upper and lower jig bodies 30, 40.

[0024] The building chimney 20 is constructed as follows. Preferably, the chimney unit spacing jig 9 is preassembled. <Jig installation process> As shown in Figs. 1 and 2, after the lower-stage chimney unit 22 is erected, the chimney unit spacing jig 9 is installed at the four upper corners 22c. In detail, as shown in Fig. 4, the lower jig body 40 is placed on the flange 22f protruding horizontally from the upper end of the lower-stage chimney unit 22 so that each chimney unit spacing jig 9 faces the upper corner 22c of the lower-stage chimney unit 22. As shown in Fig. 5, preferably, the two inner end faces 43c of the base plate portion 43 that form a right angle are abutted against two side faces that form a right angle in the corner portion 22c of the lower-stage chimney unit 22. This allows the chimney unit spacing jig 9 to be positioned relative to the lower-stage chimney unit 22. Preferably, when the base plate portion 43 is abutted against the corner portion 22c, the bolt head 51a is slightly separated from the lower-stage chimney unit 22.

[0025] <Upper chimney unit hanging process> 1 and 6, before or after the step of installing the chimney unit spacing jig 9, the upper chimney unit 21 is suspended by a hoisting means (not shown) such as a crane, positioned above the lower chimney unit 22, and lowered to a predetermined height, whereby the lower end of the upper chimney unit 21 is inserted into the insertion portion 22b at the upper end of the lower chimney unit 22. By positioning the upper chimney unit 21 at the predetermined height, the spacing between the chimney units 30, 40 becomes a predetermined size.

[0026] <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 plate 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.

[0027] <Release process of hanging means> Thereafter, the lifting means such as the crane is removed. As a result, 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 damage of the bolts 51 can be avoided.

[0028] <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.

[0029] 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.

[0030] 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 formed therein, and the lower jig body 40 may have an elongated hole 34 formed therein. 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 and lowered 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. [Industrial Applicability]

[0031] The present invention is applicable, for example, to the construction of chimneys for buildings. [Explanation of symbols]

[0032] 9 Chimney unit spacing jig 10. Building 11 Building structure 20 Building chimneys 21 Upper chimney unit 22 Lower chimney unit 22b Insertion part 22c Top corner 22f flange 23 Arm 24 Sealing material 30 Upper jig body 32 Plate part 33 Top plate 34 long hole 40 Lower jig body 42 Plate part 43 Base plate part 44 Insertion hole 50 Pressure welding means 51 Volts 52 Nut

Claims

1. 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:

2. 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.

3. A chimney unit spacing maintaining jig as described in claim 1 or 2, characterized in 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.

4. 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:

5. A method for constructing a chimney for a building as described in claim 4, characterized in that after the upper chimney unit is connected to the building structure in a manner capable of being suspended and supported in the crimped and abutted state, the crimping is released and the chimney unit spacing retaining jig is removed.

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