US20170342719A1 - Prefabricated spiral staircase - Google Patents
Prefabricated spiral staircase Download PDFInfo
- Publication number
- US20170342719A1 US20170342719A1 US15/539,998 US201615539998A US2017342719A1 US 20170342719 A1 US20170342719 A1 US 20170342719A1 US 201615539998 A US201615539998 A US 201615539998A US 2017342719 A1 US2017342719 A1 US 2017342719A1
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- US
- United States
- Prior art keywords
- tread
- bracket body
- bracket
- spiral staircase
- center pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
- E04F11/032—Spiral stairways supported by a central column
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
- E04F11/0226—Stairways having treads supported by balusters
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
- E04F11/025—Stairways having stringers
- E04F11/0255—Stairways having stringers having adjustable gradient
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/104—Treads
- E04F11/1041—Treads having means to adjust the height, the depth and/or the slope of the stair steps
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/104—Treads
- E04F11/112—Treads of metal or with an upper layer of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/18—Balustrades; Handrails
- E04F11/181—Balustrades
- E04F11/1812—Details of anchoring to the wall or floor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/18—Balustrades; Handrails
- E04F11/181—Balustrades
- E04F11/1817—Connections therefor
- E04F11/1834—Connections therefor with adjustable angle, e.g. pivotal connections
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F2011/0203—Miscellaneous features of stairways not otherwise provided for
- E04F2011/0205—Stairways characterised by the use of specific materials for the supporting structure of the treads
- E04F2011/0209—Stairways characterised by the use of specific materials for the supporting structure of the treads mainly of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F2201/00—Joining sheets or plates or panels
- E04F2201/04—Other details of tongues or grooves
- E04F2201/044—Other details of tongues or grooves with tongues or grooves comprising elements which are not manufactured in one piece with the sheets, plates or panels but which are permanently fixedly connected to the sheets, plates or panels, e.g. at the factory
- E04F2201/046—Other details of tongues or grooves with tongues or grooves comprising elements which are not manufactured in one piece with the sheets, plates or panels but which are permanently fixedly connected to the sheets, plates or panels, e.g. at the factory wherein the elements are made of metal
Definitions
- short or long screws are prepared as the screws 445 and 465 depending on the heights of the disks 440 and 460 . The reason for this is to prevent the screws 445 and 465 from protruding above the upper and lower horizontal plates 431 and 451 when the screws 445 and 465 have engaged with the female threads 446 and 466 .
- first spacer 400 a As shown in FIG. 17 , once the first spacer 400 a has been installed, one side of a first tread 500 is inserted over the center pole 300 and disposed on the top surface of an upper cap 450 a, the corresponding lower cap 430 of a second spacer 400 is inserted over the center pole 300 , and then a pressure nut 700 is engaged with the center pole 300 and applies pressure to the lower cap 430 , as in the case of the first spacer 400 a. Then the lower cap 430 pushes and stably supports the one side of the tread 500 .
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Steps, Ramps, And Handrails (AREA)
Abstract
The present invention relates to a prefabricated spiral staircase in which the heights between treads can be freely and finely adjusted, thus being conveniently assembled and installed at installation sites having different story heights.
Description
- The present invention relates to a prefabricated spiral staircase in which the heights between treads can be freely and finely adjusted, thus being conveniently assembled and installed at installation sites having different story heights.
- Staircases are divided into linear staircases and curved staircases.
- Linear staircases have linear shapes, and refer to staircases having a ladder form.
- Curved staircases are basically divided into spiral staircases with a center pole and double helical staircases without a center pole.
- Spiral staircases can be assembled at installation sites in the manners described in
patent documents 1 and 2, unlike double helical staircases. - As shown in
FIGS. 1 and 2 , the prefabricated spiral staircase 1 of patent document 1 includes: apost 2 configured to be placed upright and fastened via anchor bolts 3, and fabricated to have a height suitable for the height of a corresponding story; spacer-bushes 5 configured to be inserted over thepost 2; treads 4 configured to be inserted over thepost 2 alternately with the spacer-bushes 5; brackets 7 fastened to the treads 4 in an integrated manner, and configured to include coupling holes 6 adapted to be inserted over thepost 2; andhandrails 8 configured to be inserted into a plurality of coupling holes 9 formed at the outer ends of the treads 4, and each configured to be inserted into all the coupling holes 9 formed in vertically adjacent two of the treads 4. Of the treads 4, afastening tread 4 a configured to be installed at the uppermost end is fixedly installed on theslab 10 of a corresponding story or the like, and some of the coupling holes 9 configured to enable thehandrails 8 to be coupled thereto are formed in thefastening tread 4 a. - By the way, a story height, e.g., the height between a first floor and a second floor, at an installation site usually and slightly varies depending on the construction situation of a building or the like. For such a difference, in the case of the prefabricated spiral staircase 1 of patent document 1, the spacer-
bushes 5 suitable for a story height must be prepared or the spacer-bushes 5 must be cut or attached through welding or the like at a site on each occasion, thereby making installation inefficient or causing material to be wasted. - Meanwhile, in patent document 1, the
fastening treads 4 a are more weakly supported than the fasteningtreads 4 a supported by side plates because thefastening treads 4 a are held by thehandrails 8, i.e., stringers, composed of U-shaped rods. - Furthermore, the
fastening treads 4 a of patent document 1 are installed in such a way that they are inserted over thepost 2, and thus the treads 4 are simply disposed stepwise. Accordingly, the treads 4 are unstably fastened, and may be shaken while a user is walking up and down the staircase. - The simple stepwise insertion and disposition and the support of treads using rods may provide a sensation of instability a user.
- To remove this sensation of instability,
patent document 2 discloses a prefabricated octagonal spiral staircase. - The prefabricated octagonal spiral staircase of
patent document 2 is now described with reference toFIGS. 3 and 4 . The prefabricated octagonal spiral staircase includes: acenter pillar 16;outside stringer segments 10; andtreads 20 installed between thecenter pillar 16 and theoutside stringer segments 10. - One side of each of the
treads 20 is coupled to thecenter pillar 16, and the opposite side of each of thetreads 20 is coupled to the side plate 11 of a corresponding one of theoutside stringer segments 10. - However, in
patent document 2, the prefabricated octagonal spiral staircase can be rarely installed unless the prefabricated octagonal spiral staircase is prepared for the dimensions determined through the sufficient understanding of the circumstances of an installation site. - In other words, the
center pillar 16 is composed of eightsegments corresponding treads 20 are coupled and the number of which is equal to the number ofcorresponding treads 20 are formed in each of the segments. - Accordingly, story heights at all installation sites cannot be accommodated by the
center pillar 16 in which the notches have been formed in advance, and thus assembly parts suitable for each installation site must be fabricated. - As described above, the staircases of
patent documents 1 and 2 cannot be prefabricated for all installation sites and thus have poor versatility, with the result that the assembly and installation properties thereof are considerably degraded. - (Patent document 1) Korean Patent Application Publication No. 10-2004-0101161
- (Patent document 2) U.S. Pat. No. 5,737,884
- The present invention has been conceived to overcome the above-described problems, and an object of the present invention is to provide a prefabricated spiral staircase which can improve versatility so that the prefabricated spiral staircase can be applied to any installation site even when story height varies, thereby considerably improving the assembly and installation properties thereof.
- In order to accomplish the above object, a prefabricated spiral staircase set forth in claim 1 of the present application includes: a base configured to be fastened to a floor; a center pole configured such that the lower end thereof is installed on the base; a plurality of spacers configured to be inserted over the center pole; treads each configured such that one side thereof is inserted over the center pole between corresponding adjacent two of the spacers; outside stringers each disposed on the opposite side of the tread; and coupling members each configured to couple the opposite side of the tread to the outside stringer; wherein each of the spacers includes a cylindrical pipe, and a lower or upper cap configured to be inserted over the lower or upper side of the cylindrical pipe.
- In the prefabricated spiral staircase set forth in
claim 2 of the present application, one or more height adjustment disks are further disposed internally between the lower cap and the lower end of the cylindrical pipe or between the upper cap and the upper end of the cylindrical pipe. - In the prefabricated spiral staircase set forth in claim 3 of the present application, the center pole is a male threaded pole, and nuts are each engaged with the center pole so that the lower cap applies pressure to the one side of the tread.
- In the prefabricated spiral staircase set forth in claim 4 of the present application, the outside stringers are configured such that at least a plurality of linear side plates is assembly together and form a rectangular shape when viewed in a plan view.
- In the prefabricated spiral staircase set forth in
claim 5 of the present application, each of the coupling members includes: a bracket configured to be disposed in a recession formed by cutting out a portion of the opposite side of the tread; first fastening metal elements configured to insert and fasten the bracket into the opposite side of the tread; and second fastening metal elements configured to insert and fasten the bracket into the inner surface of a corresponding one of the linear side plates. - In the prefabricated spiral staircase set forth in claim 6 of the present application, each of the brackets includes: a bracket body configured to have an outer surface adapted to come into contact with the inner surface of the linear side plate and an inner surface adapted to come into contact with a side surface of the tread; first through holes configured to penetrate through the inner and outer surfaces of the bracket body, and to be supported by the first fastening metal elements; and second through holes configured to penetrate through the top surface of the bracket body and the outer surface of the bracket body or through the bottom surface of the bracket body and the outer surface of the bracket body, and to be supported by the second fastening metal elements.
- A spacer coupling structure for a prefabricated spiral staircase set forth in claim 7 of the present application includes a center pole configured to be fastened to a floor; a plurality of spacers configured to be inserted over the center pole; and treads each configured such that one side thereof is inserted over the center pole between corresponding adjacent two of the spacers; wherein each of the spacers comprises a cylindrical pipe, and a lower or upper cap configured to be inserted over the lower or upper side of the cylindrical pipe.
- According to the present invention, the following effects are achieved.
- The height of each of the spacers can be adjusted by selectively inserting and removing a corresponding upper or lower cap over and from the cylindrical pipe, and thus assembly and installation can be easily performed even when story height varies depending on an installation site.
- One or more disks are disposed internally between the upper cap and the cylindrical pipe or between the lower cap and the cylindrical pipe, and thus the range of differences in story height can be more rapidly dealt with. Furthermore, the disks are disposed in the inside, and thus a neat appearance can be provided, thereby enabling the present invention to be considerably useful for indoor application.
- The nuts are engaged with the male threaded center pole, and thus the lower cap applies pressure to one side of a corresponding tread, thereby firmly supporting the tread and enabling the staircase to be stably used.
- The outside stringers are configured such that at least a plurality of linear side plates are coupled to one another and form rectangular outside stringers when viewed in a plan view, and thus the rectangular outside stringers have more desirable spatial efficiency than arc-shaped outside stringers. In other words, in the case where three surfaces are walls, the corners of the rectangular outside stringers form a right angle, and thus a wasted space can be removed, thereby providing significantly desirable spatial efficiency.
- Each of brackets is disposed in a corresponding recession formed through a side surface of a corresponding one of the treads, is fastened to the corresponding tread, and then is fastened to a corresponding side plate. Accordingly, a separate recession or the like does not need to be formed in the side plate, thereby being considerably useful for the fabrication of a prefabricated staircase. Furthermore, a stable staircase can be constructed due to high torsional resistance.
- In particular, the fastening of the brackets to the side plates is performed in inclined directions, and thus the support of the treads for the side plates becomes more firm.
-
FIG. 1 is a perspective view showing a conventional prefabricated spiral staircase; -
FIG. 2 is an exploded perspective view showing the essential part ofFIG. 1 ; -
FIG. 3 is a perspective view showing another conventional prefabricated spiral staircase; -
FIG. 4 is a schematic plan view ofFIG. 3 ; -
FIG. 5 is a perspective view showing a prefabricated spiral staircase according to a preferred embodiment of the present invention; -
FIG. 6 is a plan view ofFIG. 5 ; -
FIGS. 7 to 11 are perspective views showing the installation of a center pole on a base; -
FIGS. 12 to 14 are perspective views showing the installation of the lowermost spacer; -
FIG. 15 a sectional view taken along line 15-15 ofFIG. 14 ; -
FIGS. 16 to 20 are perspective views showing the steps of the assembly of treads and a first outside stringer segment. -
FIG. 21 is a sectional view showing the coupling of a spacer according to a preferred embodiment of the present invention; -
FIG. 22 is a sectional view showing the coupling of a tread and a side plate according to a preferred embodiment of the present invention; -
FIGS. 23 and 24 are perspective views showing a bracket according to a preferred embodiment of the present invention when viewed from an outside and an inside; and -
FIG. 25 is a perspective view showing the installation state of a staircase after poles have been connected to each other. - Preferred embodiments of the present invention will be described with reference to the accompanying drawings below.
- Referring to
FIGS. 5 and 25 , aprefabricated spiral staircase 100 according to a preferred embodiment of the present invention includes: a base 200 configured to be fastened to a floor FL; acenter pole 300 configured such that the lower side thereof is installed on thebase 200; a plurality ofspacers 400 configured to be inserted over thecenter pole 300;treads 500 each configured such that the inner side thereof is inserted over a portion of thecenter pole 300 between corresponding adjacent two of thespacers 400;outside stringers 600 a to 600 d configured to be disposed on the outer sides of thetreads 500; and coupling members 900 configured to couple the outer sides of thetreads 500 to theoutside stringers 600 a to 600 d. - As shown in
FIG. 8 , thebase 200 includes afirst base 210 configured to be fastened to the floor FL, and asecond base 260 configured to be coupled to thefirst base 210 and support the lower portion of thecenter pole 300. - As shown in
FIG. 7 , thefirst base 210 is formed in a disk shape, and aninsertion hole 211 configured to receive the lower end side of thecenter pole 300 is formed at the center of thefirst base 210. - Furthermore, first through
holes 213 are formed along the edge of thefirst base 210. -
First fasteners 215 or the like are inserted into and caught in the floor FL through the first throughholes 213, thereby pressing and fastening thefirst base 210 into the floor FL. - Furthermore, a plurality of first female threaded
holes 217 is formed around theinsertion hole 211 of thefirst base 210. - The
second base 260 configured to hold the lower side of thecenter pole 300 is engaged with and fastened to the plurality of first female threadedholes 217. - As shown in
FIG. 8 , thesecond base 260 is formed in a cylindrical shape, and a second female threadedhole 261 configured to be engaged with thecenter pole 300 is formed at the center of thesecond base 260. - The second female threaded
hole 261 is disposed at a location corresponding to that of theinsertion hole 211. - A plurality of second through
holes 265 configured such that bolts, i.e.,second fasteners 263 configured to be engaged with the plurality of first female threadedholes 217, are disposed therein is formed in thesecond base 260. - The
second fasteners 263 are engaged with and caught in the first female threadedholes 217 though the second throughholes 265, as through the first throughholes 213, thereby pressing and fastening thesecond base 260 into thefirst base 210. - The
center pole 300 is a male threaded pole. As shown inFIG. 15 , thecenter pole 300 is engaged with the second female threadedhole 261 of thesecond base 260. Thelower end 301 of thecenter pole 300 is moved downward through theinsertion hole 211 of thefirst base 210 until thelower end 301 comes into contact with and is stopped by the floor FL. - When the
center pole 300 has been engaged with the second female threadedhole 261, it is preferred that aloosening prevention nut 310, such as that ofFIG. 10 , is engaged with thecenter pole 300 and pushes the top surface of thesecond base 260 so as to prevent thesecond base 260 from being loosened due to bolt loosening or the like. - In particular, it is preferred that the
loosening prevention nut 310 is implemented using a washer-based nut. - The height of the
center pole 300 may be adjusted based on the height of a corresponding story by connectingsuch center poles 300. - In other words, as shown in
FIG. 25 , thecenter poles 300, i.e., male threaded poles, may be coupled to each other via anut 330 similar to a turnbuckle. - Each of the
spacers 400 includes acylindrical pipe 410, alower cap 430 configured to be inserted over the lower side of thecylindrical pipe 410, and anupper cap 450 configured to be inserted over the upper side of thecylindrical pipe 410. - The
cylindrical pipe 410 is formed in a cylindrical shape. It is preferred that the height of thecylindrical pipe 410 is slightly smaller than the ordinary height between thetreads 500. The reason for this is that the height of thecylindrical pipe 410 is considerably useful to selectively increase and decrease the height between thetreads 500 at an installation site. - Each of the lower and
upper caps cylindrical pipe 410, and a vertical wall 433 or 453 configured to protrude from the edge of the horizontal plate 431 or 451 so as to be inserted over the outer surface of thecylindrical pipe 410. It will be apparent that through holes 435 and 455 configured to be inserted over thecenter pole 300 are formed at the centers of the horizontal plates 431 and 451, respectively. - Accordingly, the height is increased by the thickness of the horizontal plate 431 of the
lower cap 430 when thelower cap 430 is inserted over thecylindrical pipe 410, and is increased by twice the above thickness when the lower andupper caps cylindrical pipe 410. - In particular, it is preferred that
height adjustment disks 440 and 460 are further disposed in thecorresponding spacer 400. - In other words, when the
height adjustment disks 440 and 460 are inserted into an inside between thelower cap 430 and the lower end 411 of thecylindrical pipe 410 or into an inside between theupper cap 450 and the upper end 413 of thecylindrical pipe 410, the intervals between thetreads 500 can be finely adjusted. - It is preferred that a plurality of thin ring-shaped disks is prepared as the
disks 440 and 460 and a required number of thin ring-shaped disks are used. - In the present embodiment, each of the
lower disk 440 and the upper disk 460 is implemented using two disks 441 and 443 or 461 and 463. - As described above, in the present embodiment, the height of the
spacer 400 can be variously and finely adjusted through the insertion or removal of thedisks 440 and 460 as well as the upper andlower caps treads 500 can be easily assembled and installed at predetermined intervals even when the height of a story varies depending on each installation site. - Accordingly, once the
spacers 400 according to the present embodiment have been prepared, installation can be rapidly and accurately performed at any installation site without an effort to produce or machine a separate part so as to adjust the height. - In this case, since the
lower cap 430 a of the lowest one 400 a of the plurality ofspacers 400 needs to be inserted over the outer circumferential surface of thesecond base 260, as shown inFIGS. 11 and 15 , a throughhole 435 a larger than the through holes 435 of thespacers 400 above thelowest spacer 400 a is formed. - The reference symbols of the respective parts of the lowest or starting
spacer 400 a are merely made distinct by adding the lowercase character “a” to the corresponding reference symbols of theother spacers 400, and the functions of the corresponding parts are identical. - Furthermore, as shown in
FIG. 21 , it is preferred that thedisks 440 and 460 are coupled and supported inside the upper andlower caps - As shown in
FIGS. 12 and 15 , it is preferred that accommodation holes 447 and 467 configured to accommodate portions of the screws 445 and 465 are formed in the inner circumferential surfaces of thedisks 440 and 460, and female threads 446 and 466 are preferably formed in the upper andlower caps - It is preferred that short or long screws are prepared as the screws 445 and 465 depending on the heights of the
disks 440 and 460. The reason for this is to prevent the screws 445 and 465 from protruding above the upper and lower horizontal plates 431 and 451 when the screws 445 and 465 have engaged with the female threads 446 and 466. - As shown in
FIG. 17 , once thefirst spacer 400 a has been installed, one side of afirst tread 500 is inserted over thecenter pole 300 and disposed on the top surface of anupper cap 450 a, the correspondinglower cap 430 of asecond spacer 400 is inserted over thecenter pole 300, and then apressure nut 700 is engaged with thecenter pole 300 and applies pressure to thelower cap 430, as in the case of thefirst spacer 400 a. Then thelower cap 430 pushes and stably supports the one side of thetread 500. - As described above, when the
spacers 400 are assembled, a number ofpressure nuts 700 equal to the number of spacers are engaged, and thus each of thetreads 500 is firmly supported without shaking. - Protrusions 437 and 457 are formed at the centers of the top surface of the
lower cap 430 and the bottom surface of theupper cap 450, respectively. - Of the protrusions 437 and 457, the protrusion 437 used for the
lower cap 430 functions as a mounting surface configured such that a corresponding one of thepressure nuts 700 is mounted thereon, and also functions as a reinforcement member configured to prevent damage from being caused even when thepressure nut 700 is strongly tightened because the thickness of the protrusion 437 is considerably thicker than that of the horizontal plate 431. - For reference, only the through
hole 435 a is disposed in the horizontal plate 431 a of thelower cap 430 a of thelowest spacer 400 a. - As shown in
FIGS. 16 to 20 , each of thetreads 500 is a plate formed in a shape similar to a fan shape (because the treads are disposed stepwise to form a spiral shape), a throughhole 510 configured to be inserted over thecenter pole 300 is formed in one (inner) side of thetread 500, andrecessions 510 each formed by cutting out a portion of thetread 500 in a left square bracket shape are formed in the opposite (outer) side of thetread 500. - Furthermore, as shown in
FIG. 19 , arecession corresponding tread 500 in an “L” shape fitting anewel tread 500 depending on the location of thetread 500. - It is preferred that protrusions 439 and 459 configured to be inserted into the through
hole 510 are formed at the centers of the upper andlower caps hole 510 of thetread 500 from shaking when disposed between theupper cap 450 on the lower side thereof and thelower cap 430 on the upper side thereof. - The
recessions 510 are composed of recessions in a shape the upper, lower and outer sides of which are open. -
Brackets 910 which will be described later are disposed in therecessions 510. - As shown in
FIGS. 5 and 6 ,outside stringers 600 a to 600 d are formed in a rectangular shape when viewed in a plan view, and include: a firstoutside stringer segment 600 a, i.e., a starting point; a secondoutside stringer segment 600 b configured to be connected to the firstoutside stringer segment 600 a; a thirdoutside stringer segment 600 c configured to be connected to the secondoutside stringer segment 600 b; and a fourthoutside stringer segment 600 d, i.e., an ending point, configured to be connected to the thirdoutside stringer segment 600 c. - The first
outside stringer segment 600 a includes: a firstlinear side plate 610 a; a firstlinear handrail 620 a; first upper andlower newels linear side plate 610 a and the upper and lower ends of the firstlinear handrail 620 a; andfirst balusters 650 a configured to be disposed between the top surface of the firstlinear side plate 610 a and the bottom surface of the firstlinear handrail 620 a. - The second
outside stringer segment 600 b is coupled to the firstoutside stringer segment 600 a at a right angle, and includes: a secondlinear side plate 610 b configured such that the lower end thereof is coupled to the firstupper newel 630 a; a secondlinear handrail 620 b configured such that the lower end thereof is coupled to the firstupper newel 630 a; asecond newel 630 b configured to be coupled to the upper ends of the secondlinear side plate 610 b and the secondlinear handrail 620 b; andsecond balusters 650 b configured to be disposed between the top surface of the secondlinear side plate 610 b and the bottom surface of the secondlinear handrail 620 b. - The third
outside stringer segment 600 c is coupled to the secondoutside stringer segment 600 b at a right angle, and includes: a third linear side plate 610 c configured such that the lower end thereof is coupled to the secondupper newel 630 b; a thirdlinear handrail 620 c configured such that the lower end thereof is coupled to the secondupper newel 630 b; athird newel 630 c configured to be coupled to the upper ends of the third linear side plate 610 c and the thirdlinear handrail 620 c; andthird balusters 650 c configured to be disposed between the top surface of the third linear side plate 610 c and the bottom surface of the thirdlinear handrail 620 c. - The fourth
outside stringer segment 600 d, i.e., an ending point, is coupled to the thirdoutside stringer segment 600 c at a right angle, and includes: a fourthlinear side plate 610 d configured such that the lower end thereof is coupled to thethird newel 630 c; a fourthlinear handrail 620 d configured such that the lower end thereof is coupled to thethird newel 630 c; afourth newel 630 d configured to be coupled to the upper ends of the fourthlinear side plate 610 d and the fourthlinear handrail 620 d; andfourth balusters 650 d configured to be disposed between the top surface of the fourthlinear side plate 610 d and the bottom surface of the fourthlinear handrail 620 d. - A 4′-th inside
stringer segment 600 d′ facing the fourthoutside stringer segment 600 d is installed. - The 4′-th inside
stringer segment 600 d′ includes: a 4′-th newel 630 d′ configured to correspond to thefourth newel 630 d; a 4″-th newel 630 d″ configured to be fastened to the uppermost end of thecenter pole 300; a 4′-th handrail 620 d′ configured to be coupled to the 4′-th newel 630 d′ and the 4″-th newel 630 d″; and 4′-th balusters 650 d′ configured to be disposed between the top surface of thelast tread 500 b and the bottom surface of the 4′-th handrail 620 d′. - It is preferred that at least the first
upper newel 630 a, the firstlower newel 640 a, and thesecond newel 630 b are disposed on the floor and function as pillars. - The
fourth newel 630 d and the 4′-th newel 630 d′ are fastened to the wall of the slab of a second floor or the like. - Each of the first to fourth
linear side plates 610 a to 610 d and the first to fourthlinear handrails 620 a to 620 d includes an inclined linear plate inclined from the lower end thereof toward the upper end thereof. - Each of the first to fourth
linear side plates 610 a to 610 d is formed in a plate shape in which the height thereof is larger than a thickness between anouter surface 1 a thereof and aninner surface 1 b thereof, and each of the first to fourthlinear handrails 620 a to 620 d is formed in a plate shape in which the height thereof is smaller than that of the corresponding one of the first to fourthlinear side plates 610 a to 610 d. - Furthermore, it is preferred that machining is performed such that the upper and lower sides thereof are parallel or approximately parallel to the horizontal direction so as to deal with the height differences between the
outside stringer segments 600 a to 600 d. - In other words, as shown in
FIG. 20 , the firstlinear side plate 610 a includes: an inclinedlinear plate 611 a; and upper and lowerhorizontal plates linear plate 611 a. - In the same manner, the first
linear handrail 620 a includes an inclinedlinear plate 621 a and upper and lowerhorizontal plates 623 a and 625 a in a form identical to that of the firstlinear side plate 610 a. - Accordingly, each of the opposite second to fourth
linear side plates 610 b to 610 d includes: an inclined linear plate; and upper and lower horizontal plates disposed on the upper and lower sides of the inclined linear plate. - Furthermore, each of the second to fourth
linear handrails 620 b to 620 d includes an inclined linear plate and upper and lower horizontal plates in a form identical to that of each of the second to fourthlinear side plates 610 b to 610 d. - Since the upper and lower horizontal plates are disposed, the height differences between segments in upward and downward directions are prevented during the assembly of the segments, and thus the segments seem to be continuously connected to one another in their appearance.
- Although it is preferred that the handrails are formed in a bar shape rather than a plate shape, it is preferred that the handrails are formed in a plate shape because there occurs the inconvenience in which separate bars need to be connected so as to prevent height differences.
- As shown in
FIG. 22 , each of the coupling members 900 includes: abracket 910 disposed in a corresponding one of therecessions 510 of thetreads 500; firstfastening metal elements 930 configured to insert and fasten thebracket 910 into a corresponding one of thetreads 500; and secondfastening metal elements 950 configured to insert and fasten thebracket 910 into an inner surface of a corresponding one of thelinear side plates 610. - As shown in
FIGS. 23 and 24 , thebracket 910 includes: abracket body 911; first throughholes 913 configured to penetrate through the outer andinner surfaces bracket body 911; and second throughholes outer surfaces bracket body 911 or through the bottom andouter surfaces bracket body 911. - The first through
holes 913 are horizontal through holes configured to penetrate through two surfaces, i.e., the inner andouter surfaces - The second through
holes holes 915 and 2b-th throughholes 917 according to the present embodiment and then described below. - In other words, the 2a-th through
holes 915 are through holes configured to penetrate through two adjacent surfaces, i.e., the top andouter surfaces bracket body 911. - Furthermore, the 2b-th through
holes 917 are through holes configured to penetrate through two adjacent surfaces, i.e., the bottom andouter surfaces bracket body 911. - In the same manner, the second
fastening metal elements 950 are divided into 2a-thfastening metal elements 950 a and 2b-thfastening metal elements 950 b and then described. - It is preferred that the
bracket body 911 is formed in a hexahedron shape having front andrear surfaces 911 e and 911 f, the inner andouter surfaces bottom surfaces - When the
bracket body 911 is formed in a hexahedron shape, the 2a-th throughholes 915 correspond to 2a-th inclined throughholes 915 having a positive slope from a top (i.e., the top surface) to a bottom (i.e., the outer surface), and the 2b-th throughholes 917 correspond to 2b-th inclined throughholes 917 having a negative slope from a bottom (i.e., the bottom surface) to a top (i.e., the outer surface). - The plurality of first through holes 913 (which is three in number in the present embodiment) is disposed in a direction from a front side to a rear side. The number of first through holes 9130 is determined based on the specifications of a staircase.
- The first
fastening metal elements 930, such as nails or screws, are inserted into the first throughholes 913 and fastened to a side of thetread 500, and thus the firstfastening metal elements 930 function to fasten thebracket body 911 to thetread 500. - The 2a-th inclined through
holes 915 are disposed above locations between the first throughholes 913, and the 2b-th throughholes 917 are disposed immediately below the first throughholes 913. - The 2a-th and 2b-th
fastening metal elements holes inner surface 1 b of theside plate 610, and thus the 2a-th and 2b-thfastening metal elements bracket body 911 to theside plate 610. - In particular, the 2a-th and 2b-th
fastening metal elements fastening metal elements - Stop protrusions configured to stop the head portions of nails or screws are formed inside the first through
holes 913 and the 2a-th and 2b-th inclined throughholes - Meanwhile, it is preferred that a
flange 960 is further formed around the front, rear, and inner edges of thebottom surface 911 d of thebracket body 911. - The
flange 960 supports lower end edges of therecession 510 of thetread 500, thereby sustaining larger load. - In particular, when the
flange 960 is disposed in a steppedgroove 515 formed around therecession 510, theflange 960 is disposed in the same plane in which the bottom surface of thetread 500 is disposed, thereby providing a desirable appearance. - Furthermore, it is preferred that a downwardly extended
portion 970 configured to extend downward is further formed on an outer side of thebottom surface 911 d of thebracket body 911. - Third through
holes 981 configured such that thirdfastening metal elements 980, such as nails, screws, or the like, are coupled through the third throughholes 981 are further formed in the downwardly extendedportion 970. - Stop protrusions configured to stop the head portions of the third
fastening metal elements 980 are formed inside the third throughholes 981. - The downwardly
extended portion 970 comes into tight contact with theinner surface 1 b of theside plate 610 and is fastened to theinner surface 1 b of theside plate 610 via the third throughholes 981, thereby sustaining considerably large load. - It is preferred that finishing plates (not shown) having a color identical to that of the
tread 500 are attached to the top andbottom surfaces bracket 910 via adhesive, magnets, screws, or the like. - When the finishing plate are fastened via screws, it is preferred that female threads are formed on the
top surface 911 c of thebracket 910 and the front and rear surfaces of theflange 960. - As described above, although the present invention has been described with reference to the preferred embodiments of the present invention, it will be apparent to those skilled in the art that the present invention may be changed or modified and then practiced in various manners without departing from the spirit and scope of the present invention set forth in the attached claims.
- For example, although the outside stringers have been described as including the side plates, the handrails, the newels, and the balusters in a broad sense in the detailed description of the present embodiment, it will be apparent that the outside stringers may include only side plates and may form a spiral staircase in a narrow sense, which is applied to the present embodiment without change.
- 100: prefabricated spiral staircase
- 210 and 260: first and second bases
- 300: center pole
- 400: spacer
- 410: cylindrical pipe
- 450 and 430: upper and lower caps
- 440 and 460: disks
- 500: treads
- 600 a to 600 d: outside stringers
- 610 a to 610: linear side plates
- 620 a to 620 d: linear handrails
- 630 a to 630 d: newels
- 650 a to 650 d: balusters
- 700: (pressure) nuts
- 900: coupling members
- 910: bracket
- 911: bracket bodies
- 913: first through holes
- 915 and 917: second inclined through holes
- 930: first fastening metal elements
- 950: second fastening metal elements
- 960: flanges
- 970: downwardly extended portions
- 980: third fastening metal elements
- 984: third inclined through holes
Claims (9)
1. A prefabricated spiral staircase, comprising:
a base configured to be fastened to a floor;
a center pole configured such that a lower end thereof is installed on the base;
a plurality of spacers configured to be inserted over the center pole;
treads each configured such that one side thereof is inserted over the center pole between corresponding adjacent two of the spacers;
outside stringers each disposed on an opposite side of the tread; and
coupling members each configured to couple the opposite side of the tread to the outside stringer;
wherein each of the spacers comprises a cylindrical pipe, and a lower or upper cap configured to be inserted over a lower or upper side of the cylindrical pipe; and
wherein one or more height adjustment disks are further disposed internally between the lower cap and a lower end of the cylindrical pipe or between the upper cap and an upper end of the cylindrical pipe.
2. The prefabricated spiral staircase of claim 1 wherein the center pole is a male threaded pole, and nuts are each engaged with the center pole so that the lower cap applies pressure to the one side of the tread.
3. The prefabricated spiral staircase of claim 1 wherein the outside stringers are configured such that at least a plurality of linear side plates is assembled together and form a rectangular shape when viewed in a plan view.
4. The prefabricated spiral staircase of claim 3 wherein each of the coupling members comprises: a bracket configured to be disposed in a recession formed by cutting out a portion of the opposite side of the tread; first fastening metal elements configured to insert and fasten the bracket into the opposite side of the tread; and second fastening metal elements configured to insert and fasten the bracket into an inner surface of a corresponding one of the linear side plates.
5. The prefabricated spiral staircase of claim 4 wherein each of the brackets comprises: a bracket body configured to have an outer surface adapted to come into contact with the inner surface of the linear side plate and an inner surface adapted to come into contact with a side surface of the tread; first through holes configured to penetrate through the inner and outer surfaces of the bracket body, and to be supported by the first fastening metal elements; and second through holes configured to penetrate through a top surface of the bracket body and the outer surface of the bracket body or through a bottom surface of the bracket body and the outer surface of the bracket body, and to be supported by the second fastening metal elements.
6. A spacer coupling structure for a prefabricated spiral staircase, comprising:
a center pole configured to be fastened to a floor;
a plurality of spacers configured to be inserted over the center pole; and
treads each configured such that one side thereof is inserted over the center pole between corresponding adjacent two of the spacers;
wherein each of the spacers comprises a cylindrical pipe, and a lower or upper cap configured to be inserted over a lower or upper side of the cylindrical pipe; and
wherein one or more height adjustment disks are further disposed internally between the lower cap and a lower end of the cylindrical pipe or between the upper cap and an upper end of the cylindrical pipe.
7. The prefabricated spiral staircase of claim 2 wherein the outside stringers are configured such that at least a plurality of linear side plates is assembled together and form a rectangular shape when viewed in a plan view.
8. The prefabricated spiral staircase of claim 7 wherein each of the coupling members comprises: a bracket configured to be disposed in a recession formed by cutting out a portion of the opposite side of the tread; first fastening metal elements configured to insert and fasten the bracket into the opposite side of the tread; and second fastening metal elements configured to insert and fasten the bracket into an inner surface of a corresponding one of the linear side plates.
9. The prefabricated spiral staircase of claim 8 wherein each of the brackets comprises: a bracket body configured to have an outer surface adapted to come into contact with the inner surface of the linear side plate and an inner surface adapted to come into contact with a side surface of the tread; first through holes configured to penetrate through the inner and outer surfaces of the bracket body, and to be supported by the first fastening metal elements; and second through holes configured to penetrate through a top surface of the bracket body and the outer surface of the bracket body or through a bottom surface of the bracket body and the outer surface of the bracket body, and to be supported by the second fastening metal elements.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2015-0005429 | 2015-01-13 | ||
KR1020150005429A KR101560676B1 (en) | 2015-01-13 | 2015-01-13 | spiral stair case |
PCT/KR2016/000036 WO2016114518A1 (en) | 2015-01-13 | 2016-01-05 | Prefabricated spiral staircase |
Publications (1)
Publication Number | Publication Date |
---|---|
US20170342719A1 true US20170342719A1 (en) | 2017-11-30 |
Family
ID=54357100
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/539,998 Abandoned US20170342719A1 (en) | 2015-01-13 | 2016-01-05 | Prefabricated spiral staircase |
Country Status (3)
Country | Link |
---|---|
US (1) | US20170342719A1 (en) |
KR (1) | KR101560676B1 (en) |
WO (1) | WO2016114518A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190003186A1 (en) * | 2016-02-15 | 2019-01-03 | Seonghwan SEO | Spacer for prefabricated spiral staircase and prefabricated spiral staircase using same |
US10487514B1 (en) * | 2018-05-23 | 2019-11-26 | Safe Rack Llc | Tread mounting system for spiral staircase |
US11585109B2 (en) * | 2019-06-24 | 2023-02-21 | Aqua Conscience Holdings LLC | Lifeguard observation station |
US11585108B2 (en) * | 2019-06-24 | 2023-02-21 | Aqua Conscience Holdings LLC | Lifeguard observation station |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3061250B2 (en) * | 1995-03-10 | 2000-07-10 | 住友林業株式会社 | Round staircase |
KR200201279Y1 (en) * | 2000-05-18 | 2000-11-01 | 성유경 | Stairway interval adjusting facility |
JP2003184250A (en) * | 2001-12-13 | 2003-07-03 | Enomoto Co Ltd | Wedge for stair tread |
JP2005220656A (en) * | 2004-02-06 | 2005-08-18 | Naruse Tokushu Mokuzai Kk | Spiral stairs |
JP5020797B2 (en) * | 2007-12-14 | 2012-09-05 | 義邦 大倉 | Stair support |
-
2015
- 2015-01-13 KR KR1020150005429A patent/KR101560676B1/en active IP Right Grant
-
2016
- 2016-01-05 US US15/539,998 patent/US20170342719A1/en not_active Abandoned
- 2016-01-05 WO PCT/KR2016/000036 patent/WO2016114518A1/en active Application Filing
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190003186A1 (en) * | 2016-02-15 | 2019-01-03 | Seonghwan SEO | Spacer for prefabricated spiral staircase and prefabricated spiral staircase using same |
US10407914B2 (en) * | 2016-02-15 | 2019-09-10 | Seonghwan SEO | Spacer for prefabricated spiral staircase and prefabricated spiral staircase using same |
US10487514B1 (en) * | 2018-05-23 | 2019-11-26 | Safe Rack Llc | Tread mounting system for spiral staircase |
US11585109B2 (en) * | 2019-06-24 | 2023-02-21 | Aqua Conscience Holdings LLC | Lifeguard observation station |
US11585108B2 (en) * | 2019-06-24 | 2023-02-21 | Aqua Conscience Holdings LLC | Lifeguard observation station |
Also Published As
Publication number | Publication date |
---|---|
KR101560676B1 (en) | 2015-10-15 |
WO2016114518A1 (en) | 2016-07-21 |
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