JPS6326558Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a stair ladder fixing device for fixing a folding ladder installed on a ceiling retractable staircase to the upper surface of a stair storage lid.

A structural method of retractable stairs in the ceiling is known as a means of effectively utilizing the play space under the attic, and an overview of this method will be explained here.

The staircase consists of a storage frame consisting of a square frame fixedly attached to the opening edge of the ceiling, a storage lid that is hinged to one side of the lower edge of the storage frame and swings downward to open and close, and a storage lid that swings downward to open and close. When the storage lid is closed and the storage position is closed, the lower surface of the lid plate communicates with the ceiling surface and does not spoil the appearance of the ceiling. When the lid is opened diagonally downward and the ladder is extended to the floor, it is possible to easily go up and down the ladder to access the space above the ceiling, just like a regular built-in staircase. It's becoming like that.

However, a joist is fixed to the edge of the ceiling opening for reinforcement, and the lower end of the storage frame is fixed to the joist by nailing, etc., while the storage lid swings. The end is supported by the storage frame via a suspension link, and the weight torque of the storage lid is balanced by a suspension spring engaged between the end and the storage frame.

Note that a folding ladder is formed by connecting multiple (usually three) partial ladders, each of which is hinged at the wrong end of each step, and can be easily folded by folding each partial ladder. It is designed to be foldable.

By the way, as mentioned above, the ladder for stairs is attached to the top surface of the storage lid, but since a locking mechanism is provided at the swinging end of the top surface of the storage lid, it is difficult to attach the ladder. It is necessary to secure the ladder to the storage lid while floating at a height that avoids the locking mechanism.For this reason, in the structure of conventional retractable stairs, a sleeper is placed on the underside of the ladder, and then the ladder is fixed to the storage lid with a raised height that avoids the locking mechanism. A method was adopted in which it was fixed to the storage lid.

However, according to this conventional fixing method,
The problem was that the number of parts increased by the number of parts, and the number of assembly steps also increased accordingly, leading to an increase in manufacturing costs.

The present invention has been made in order to solve the above-mentioned difficulties, and the purpose of the present invention is to provide a ladder for stairs that can be fixed in a floating manner without intervening a ladder. The purpose of the present invention is to provide a fixing device.

The present invention will be described below based on one embodiment shown in the drawings. First, the structure of a retractable staircase equipped with a fixing device of the embodiment will be described with reference to FIG.

The storage frame 1 is fixed to the side surface of a joist 3 fixed to the back edge of the ceiling opening 2 by nailing, screwing, etc., with its lower edge facing the ceiling opening 2, and A base end of a storage lid 5 is connected to the lower end of the inner wall on the depth side of the storage lid 5 via a pair of left and right hinges 4.

The swinging ends of the storage lid 5 are supported by suspension fittings 7 fixed to the left and right inner walls of the storage frame 1 via a pair of left and right suspension links 6. It is formed by upper and lower arms 8 and 9 which are knuckle-connected in the middle.

Furthermore, a pair of hanging springs 11 each made of a coil spring are installed between the lower end portion of each lower arm 9 and each hanger 10 fixed to the left and right corners of the inner wall on the depth side of the storage frame 1. are multiplied, and the weight load torque applied to the storage lid 5 is balanced in the closed state.

In addition, a lock mechanism 12 is provided at the swing end of the storage lid 5.
is suspended horizontally, and a lock key 13 is attached to the center of the mechanism 12, so that the lid 5 is locked when closed.

Next, the folding ladder 14 is formed by upper, middle, and lower partial ladders 16, 17, and 18 that are connected to each other by left and right hinge fittings 15, and the upper partial ladder 16 has four corners. Fixing bracket 1
The upper partial ladder 16 is fixedly held on the storage lid 5 at a floating height via a ladder 9, and handrails 20 are provided upright on each of the left and right side plates of the upper partial ladder 16.

By the way, as shown in FIGS. 2 to 4, the fixing device of the embodiment has a U-shaped cross section,
A bracket-shaped fixing fitting 19 with a collar is used, and the fitting 19 has a base plate portion 19a forming a lower plate, a rising portion 19b, a receiving plate portion 19c forming an upper plate, and a receiving plate portion 19. It is a sheet metal member in which a semicircular mounting collar 19d rising from 19c is integrally molded.

A mounting hole 21 made of a long hole is bored in the base plate part 19a on the longitudinal center line, and the fixing metal fitting 19 can be adjusted in its forward and backward position with a stud bolt 22 inserted through the mounting hole 21. The mounting collar 19d has a bolt through hole drilled therein, and the side plate 16a of the upper partial ladder 16 can be fastened to the storage lid 5 with a bolt 23 inserted through the through hole. Therefore, it is fastened to the fixture 19.

In the fixing device of the embodiment configured in this way, since the fixing metal fittings 19 themselves have a floating height, there is no need for a support such as a sleeper, and therefore, only the four fixing metal fittings 19 can be connected to a ladder. 14 storage lid 5
can be installed on.

As described above, according to the stair ladder fixing device according to the present invention, since the device is configured with the fixing metal fitting having the required rising height between the base part and the receiving plate part of the metal fitting, There is no need to attach anything other than fixing fittings, which has the practical effect of reducing the manufacturing cost of the device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a retractable staircase equipped with a fixing device according to an embodiment, FIG. 2 is an inclined side view of a stair ladder fixing device according to an embodiment of the present invention, and FIG. FIG. 2 is a front sectional view taken along the - line in FIG. 2, and FIG. 4 is a plan view of FIG. 3. 1...Storage lid, 14...Ladder, 16...Partial ladder, 16a...Ladder side plate, 19...Fixing metal fittings, 1
9a... Board part, 19c... Receiving plate part.

Claims (1)

[Scope of utility model registration request] In the ladder fixing device, the lower surface of the folding ladder is fixed to the upper surface of the storage lid 5 of the ceiling retractable staircase via a required floating space. A substrate portion 1 having two plate portions facing each other below and forming the lower plate thereof.
9a is fixed to the upper surface of the storage lid 5, and
The receiving plate portion 19c forming the upper plate supports the lower surface of the ladder, and a fixing metal fitting 19 having a mounting collar 19d formed integrally rising on the receiving plate portion 19c is fixed to the side surface of the ladder. A fixing device for a stair ladder, characterized in that: