JPS6326559Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a hanging device for a staircase suspension spring for latching a suspension spring that lifts and biases a storage lid of a ceiling storage type staircase.

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 includes a storage frame consisting of a square frame fixedly attached to the opening edge of the ceiling, and a storage lid that is hinged to one side of the lower edge of the storage frame and swings downward to open and close.
It is formed by a folding ladder attached to the top surface of the storage lid, and when the storage lid is in the closed storage position, the bottom surface of the lid plate communicates with the ceiling surface and spoils the appearance of the ceiling. In addition, when the storage lid is opened diagonally downward and the ladder is extended to the floor, it is easy to climb up and down the ladder to access the space above the ceiling, just like a regular built-in staircase. It is now possible to go in and out.

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 opposite end of each step, and can be easily folded by folding each partial ladder. It is designed to be foldable.

By the way, the above-mentioned suspension spring that lifts and biases the storage lid must be able to easily adjust the tension due to the need for balance adjustment when assembling the stairs. The structure is such that the hanging position of the hanging spring is variable. Specifically, the fixed side end of the hanging spring is hooked to the hanging hole at the fixed location of the storage frame, and the hanging spring is The movable end of the suspension link has a structure in which the tension can be adjusted in stages by selectively changing the hanging holes at a plurality of locations drilled near the lower end of the suspension link.

However, such a conventional latching structure has a problem in that the work required for balance adjustment is extremely troublesome, and specifically, the following complicated operation steps are required.

(1) After closing the storage lid, go up to the ceiling and remove the latch on the fixed side.

(2) Go down, open the storage lid, and remove the latch on the moving side.

(3) Hang the movable side into the appropriate hole.

(4) After closing the storage lid, go up to the ceiling and re-latch the fixed side.

(5) Go down.

In this way, it took a lot of effort and time to go back and forth to the attic twice.

The present invention has been made to solve the above-mentioned problems, and the purpose of the present invention is to enable adjustment operations by simply entering the attic once, without opening or closing the storage lid. To provide a hanging device for a hanging spring for stairs.

The present invention will be described below based on an illustrated embodiment, but first, the structure of a retractable staircase equipped with a latching device according to the embodiment will be described with reference to FIG.

The storage frame 1 is fixed to the side 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 the storage frame 1 A base end of a storage lid 5 is coupled 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 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.

Furthermore, a lock mechanism 12 is provided at the swinging 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, in the latching device of the embodiment, as shown in FIGS. 2a and 2b and FIG.
The hanger 10 to which the upper end, that is, the fixed side end 11a of the hanger 1 is attached, has a U-shaped cross section, and has two mounting surfaces 10a and 10b along the inner wall of the storage frame 1, and two mounting surfaces 10a and 10b in the longitudinal direction of the storage frame 1. An engagement piece 10c is formed that projects from the top.

The two mounting surfaces 10a and 10b are each fastened to the storage frame 1 by bolts 21, and the engagement piece 10c has multiple locations above and below (four stages in the illustration).
A longitudinal hanging hole 10d is drilled, and a hanging spring 11
The stepped portion 11a corresponds to the hanging hole 10d selected at the time of adjustment.
It's becoming more and more latched onto.

On the other hand, the movable end 11b of the hanging spring 11 has a hanging hole 2 formed at one location near the lower end of the hanging link 6.
It is hooked up to 2.

In the hanging device of the embodiment thus configured, the spring tension increases as the fixed end 11a of the suspension spring 11 is hung on the upper hanging hole 11d.
The lifting force applied to the storage lid 5 can be adjusted.

However, in the case of this embodiment, with the storage lid 5 closed as shown in FIG. Since the hole can be replaced, the tension of the hanging spring 11 can be easily adjusted.

As described above, according to the hanging device for a stair hanging spring according to the present invention, the fixed end and the movable end of the hanging spring can be connected to multiple stages of hanging fixtures fixed to the storage frame, respectively. Since the hanging link is configured so that it can be hung in one hole in the hanging hole and in a fixed place near the lower end of the suspension link, the tension of the balance suspension spring can be easily adjusted, making it easier to assemble retractable stairs. This has the effect of improving performance and maintenance workability.

Further, according to the present invention, the U-shaped hanger 10 is fixed along the corner of the inner wall surface of the storage frame 1, and the hook 10 protrudes into the inner opening of the storage frame 1. The piece 10c has a hanging hole 10d consisting of horizontally elongated holes in multiple upper and lower stages.
, and the fixed side end of the hanging spring 11 is relatably latched to this hanging hole 10d, so that the engagement piece 10c of the U-shaped hanger 10 and the other piece along the inner wall of the storage frame 1 are easily connected. Since a space is secured between them for the rehanging operation, and the hanging hole 10d is also a horizontally elongated hole that can ensure sufficient length and strength, it is easy and safe to pull the end of the suspension spring 11 in the horizontal direction. You can change it to .

[Brief explanation of drawings]

FIG. 1 is a perspective view of a retractable staircase equipped with a latching device according to an embodiment, and FIG. Figure b is an operational view of Figure 2a, and Figure 3 is a perspective view of the hanger of Figure 2a. 1...Storage frame, 6...Hanging link, 10...Hanging tool, 10d, 22...Hanging hole, 11...Hanging spring, 1
1a... Fixed side end, 11b... Moving side end.

Claims (1)

[Claim for Utility Model Registration] The fixed end of the hanging spring 11 for a ceiling retractable staircase is attached to the storage frame 1 of the staircase, and the movable end of the hanging spring 11 is attached to the hanging spring 11 of the staircase. In the suspension spring latching device that is attached to the vicinity of the lower end of the lower link 6, the corner of the inner wall surface of the storage frame 1 has a cross-sectional shape of U.
A shaped hanger 10 is fixed with the outer surfaces of two consecutive pieces along the inner wall surface of the corner of the storage frame 1, and the hanger 10 projects into the internal opening of the storage frame 1. The other piece, the engagement piece 10c, is provided with hanging holes 10d that are vertically elongated holes in multiple stages, and the fixed side end of the suspension spring 11 is connected to one of the hanging holes 10d. A latching device for a hanging spring for stairs, characterized in that the hanging spring 11 is latched in the hole, and the movable end of the hanging spring 11 is latched at a predetermined location on the lower end of the hanging link 6.