ATTIC STAIRS WITH A SUPPORT BEAM

Abstract

Attic stairs include box, closing hatch for the box and ladder. The ladder is suspended in box using at least one flat bar attached to support beam seated in an upper section of the ladder. The support beam is a profile and each end of the profile has end cap with locking pin locking it in support beam.

Claims

1. Attic stairs comprising a box, a closing hatch for the box and a ladder, wherein the ladder is suspended in the box using at least one flat bar, the at least one flat bar is attached to a support beam, the support beam is seated in an upper section of the ladder, wherein the support beam is a profile and each end of the profile has an end cap with a locking pin, the locking pin locks the end cap in the support beam.

2. The attic stairs according to claim 1, wherein the end cap comprises at least one elastic arm with a ridge, the ridge is positioned in an opening in the support beam profile, wherein elastic arms of the end cap comprise stop faces, once installed, the stop faces are flush with a locking pin surface, the locking pin surface locks the stop faces against a return motion.

3. The attic stairs according to claim 1, wherein the end cap comprises a seat with clamping arms to clamp the locking pin in the end cap, wherein the locking pin comprises a narrowing terminating with an extension flush with the clamping arms.

4. The attic stairs according to claim 1, wherein the end cap comprises a slip sleeve, wherein a flat bar end is suspended on the slip sleeve.

5. The attic stairs according to claim 2, wherein the end cap comprises a seat with clamping arms to clamp the locking pin in the end cap, wherein the locking pin comprises a narrowing terminating with an extension flush with the clamping arms.

6. The attic stairs according to claim 2, wherein the end cap comprises a slip sleeve, wherein a flat bar end is suspended on the slip sleeve.

7. The attic stairs according to claim 3, wherein the end cap comprises a slip sleeve, wherein a flat bar end is suspended on the slip sleeve.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The illustration depicts the present invention, with given figures depicting the following:

[0007] FIG. 1 is a spatial view of the attic stairs,

[0008] FIG. 2 is an exploded view of a fragment of the attic stairs with a support beam,

[0009] FIGS. 3A and 3B show cross sections of the end cap with a locking pin.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0010] The present invention is depicted in the embodiment of attic stairs with a ladder constructed out of at least two segments of stairs. Attic stairs include a box 1 with a closing hatch 2 on the bottom. At least two segments of stairs 3, 4 are suspended in the box using flat bars 51, 52. Flat bars 51, 52 are attached to the staircase ladder support beam. The stairs also include a pair of hinges 6 mounted on box 1. Hinge 6 includes two hanger flat bars for suspending closing hatch 2 in the box using upper brackets 16 of closing hatch 2. Furthermore, two hanger flat bars of hinge 6 terminate with hooks for a detachable attachment of upper bracket 16 and closing hatch 2. Closing hatch 2 also includes two lower brackets for attachment to the lower hanger flat bars. One end of the hanger flat bars is mounted to stringers of the first segment of the stairs and the other is attached to the lower bracket. Support beam 7 is located under first segment of the stairs 3 and is mounted to stringers 31 of first segment of the stairs 3 using screws. Support beam 7 is a profile with end caps 8 at its ends. End cap 8 includes at least one elastic arm 82 with ridge 81. Upon inserting end cap 8 into support beam 7 profile, ridge 81 is positioned in an opening in support beam 7 locking support beam 7 end cap in place. End cap 8 also includes seat 9 for locking pin 10 via which support beam 7 is attached to flat bar 52. After inserting locking pin 10 into the end cap, elastic arms 82 are flush with locking pin 10 surface. Locking pin 10 is locked in seat 9 using clamping arms 91 flush with locking pin 10 extension 11. At the same time the pin locks elastic arm 82 with ridge 81 preventing it from flexing. Flexible arms 82 of the end cap include stop faces which, once installed, are flush with locking pin 10 surface also locking it against return motion. The other end of flat bar 51 is attached to a base plate seated on an inside wall of the box. The base plate is attached using an attachment to the box. Set of flat bars 51, 52 travels together with attic stairs segments due to rotatable attachments with base plate 12 and slip sleeve 13 of end cap 8.