SPACER FOR PREFABRICATED SPIRAL STAIRCASE AND PREFABRICATED SPIRAL STAIRCASE USING SAME

• US 20190003186A1
• Filed: 01/10/2017
• Published: 01/03/2019
• Est. Priority Date: 02/15/2016
• Status: Active Grant

• Current Assignee: Seonghwan Seo
• Original Assignee: Seonghwan Seo
• Inventors: SEO, Seonghwan
• Granted Patent: US 10,407,914 B2
• Time in Patent Office: Days
• CPC Class Codes: E04F 11/032 Spiral stairways supported by a central column
• CPC Class Codes: E04F 11/035 Stairways consisting of a plurality of assembled modular parts without further support E04F11/032 takes precedence
• CPC Class Codes: E04F 11/1041 having means to adjust the height, the depth and/or the slope of the stair steps E04F11/1042 - E04F11/116 take precedence

Abstract

The present invention relates to a spacer for a prefabricated spiral staircase, which allows adjustment of a height of a gap between footboards for a prefabricated spiral staircase in multiple steps by using minimal disks, and a prefabricated spiral staircase using the same. The spacer for a prefabricated spiral staircase comprises a cylindrical pipe, a lower cap or upper cap, a disk, a height adjustment member, and a location determining member, wherein the height of the spacer is adjusted in multiple stages according to relative rotation between the upper cap and the disk or between the lower cap and the disk.

Claims

1. A spacer for a prefabricated spiral staircase for adjusting a height between footboards comprising:

cylindrical tubes;

an upper cap or a lower cap fitted into the lower end or the upper end of the cylindrical tube;

a disk positioned at the inside between the lower cap and the lower end of the cylindrical tube, or at the inside between the upper cap and the upper end of the cylindrical tube;

a height adjustment member adjusting a height between the upper cap and the disk or between the lower cap and the disk;

a position determination member determining a position between the upper cap and the disk or between the lower cap and the disk,

wherein the height adjustment member adjusts height depending on relative rotation between the upper cap and the disk, or between the lower cap and the disk,

the lower cap or the upper cap comprises a horizontal plate which covers the lower end or the upper end of the cylindrical tube, and an outer vertical wall which protrudes from the edge of the horizontal plate in the upper direction or in the lower direction so as to be fitted into and wrap the outer side of the lower end of the cylindrical tube or the outer side of the upper end of the cylindrical tube,

the height adjustment member comprises a first multiple differentiated step part which is formed at the bottom of the horizontal plate and has multiple steps like a staircase, and a second multiple differentiated step part which is formed at the disk and corresponds to the first multiple differentiated step part,

the position determination member comprises position determination protrusions which are formed at the upper cap or the lower cap, and position determination grooves which are formed at the disk and coupled to the position determination protrusions,

the disk has numerical marks on a surface thereof according to heights of the second multiple differentiated step part,

the position determinations grooves are formed at every position where the numerical marks are formed.

2. A prefabricated spiral staircase comprising:

a center pole whose lower end is supported by the floor;

a plurality of footboards whose one side is fitted into the center pole;

spacers for a center pole footboard which are fitted into the center pole and support the gaps between the footboards; and

spacers for an outside footboard which are fitted into the gaps between the other sides of the footboards to support the same,

wherein the spacers for a center pole footboard and the spacers for an outside footboard respectively comprise a cylindrical tube, a lower cap or an upper cap fitted into the lower end of the cylindrical tube or the upper end of the cylindrical tube, disks positioned at the inside between the lower cap and the lower end of the cylindrical tube, or at the inside between the upper cap and the upper end of the cylindrical tube, a height adjustment member adjusting a height between the upper cap and the disk or between the lower cap and the disk, and a position determination member determining a position between the upper cap and the disk or between the lower cap and the disk,

the height adjustment member adjusts height depending on relative rotation between the upper cap and the disk, or between the lower cap and the disk,

the lower cap or the upper cap comprises a horizontal plate which covers the lower end of the cylindrical tube or the upper end of the cylindrical tube, and an outer vertical wall which protrudes from the edge of the horizontal plate in the upper direction or in the lower direction so as to be fitted into and wrap the outer side of the lower end of the cylindrical tube or the outer side of the upper end of the cylindrical tube,

the height adjustment member comprises a first multiple differentiated step part which is formed at the bottom of the horizontal plate and has multiple steps like a staircase, and a second multiple differentiated step part which is formed at the disk and corresponds to the first multiple differentiated step part,

the position determination member comprises position determination protrusions which are formed at the upper cap or the lower cap, and position determination grooves which are formed at the disk and coupled to the position determination protrusions,

the disk has numerical marks on a surface thereof according to heights of the second multiple differentiated step part,

the position determination grooves are formed at every position where the numerical marks are formed.