JPH0332172Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) This invention relates to a hanging device for a stairway that can be retracted from the ceiling and is lowered from the ceiling when in use, allowing people to ascend and descend from the ceiling. .

(Prior Art) First, an overview of this type of conventional staircase suspension device will be described with reference to FIGS. 5 and 6.

First, a storage opening 1a is opened in a ceiling surface 1 to which a staircase is attached, and a reinforcing joist 2 is fixed on the back side of the edge of the opening.

However, the staircase itself consists of a rectangular storage frame 3,
The storage frame is composed of a storage lid 4 on which a folding ladder (not shown) is attached and held, and a hanging device formed by a pair of left and right links 5, a hanging spring 6, etc. 3 is inserted into the storage opening 1a from below, and then the joist 2 is inserted by nailing or other means.
is fixed and installed.

Specifically, to the left of the lower end of one short side of the storage frame 3,
The base end of the storage lid 4 is swingably connected to the right side via a hinge metal fitting 7, and a spring receiver 8 is fixedly installed above each of the left and right hinge metal fittings 7. A selective groove for hanging a spring is bored in the spring receiver 8, and the base ends of folding links 5 (described later) are pivotally attached to the inner walls of the left and right side plates of the storage frame 3. A suspension fitting 9 is fixed.

On the other hand, on the left and right sides of the upper surface of the storage lid 4, pivot fittings 10 to which the lower ends of the links 5 are attached are fixed. In the link 5, a frame side arm 11 and a lid side arm 12 are foldably joined by rivets at an intermediate knuckle portion 5a.

In addition, hanging springs 6 made of extension coil springs are hung between the hanging holes of the left and right lid-side arms 12 near the pivot fittings 10 and the selection grooves of the left and right spring holders 8. ing.

In the state shown in FIG. 5 when the storage lid 4 is fully open, by extending the folded ladder onto the storage lid 4, the lower end of the ladder will come into contact with and rest on the floor of the chamber. This allows users to climb up and down the ladder to access the attic space in the same way as with built-in stairs.

Furthermore, in this state, the tension of the hanging spring 6 is almost balanced with the gravity of the storage lid 4, which includes the weight of the ladder. It is automatically raised and swung to a horizontal closed position by the pulling up force, and is locked in the closed position by a locking mechanism (not shown).

(Purpose of the invention) However, in the conventional ceiling retractable staircase equipped with a hanging device configured in this way, there is a problem in the work when assembling the stairs. When the suspension spring 6 is brought to the site, it is brought in as a component, so as shown in Fig. 6, the storage frame 3 is
After fixing and installing the hanging spring 6 to the joists 2, it is necessary for the worker to enter the ceiling space, hook the base end of the suspension spring 6 into the selection groove of the spring receiver 8, and assemble it.

In this case, according to the above-mentioned structure of the conventional hanging device, since the knuckle portion 5a of the link 5 is riveted, the operator inserts his/her hand into the storage frame 3 while holding the hanging spring 6. It is necessary to pull the base end toward the spring receiver 8.

However, the operating force F ₁ required for pulling at this time is
In addition to the large force reaching approximately 40Kg, the pulling operation is from an oblique direction, and there is a folded ladder inside the storage frame 3 that obstructs the operation, making the assembly operation extremely difficult. The problem was that it was difficult to do.

In addition, such problems occur not only during the above-mentioned assembly work, but also after installation.
The same thing occurs when the base end of the hanging spring 6 is replaced with another stepped groove of the selection groove of the spring receiver 8 in order to adjust the tension.

Therefore, an object of the present invention is to provide a staircase suspension device in which the hanging spring can be easily assembled in the attic and does not require a large operating force.

(Structure of the invention) The structure of the invention that achieves the above object will be explained below.

That is, the present invention includes a storage lid 4 that is hinged at one end edge to one side edge of the lower surface of the inner surface of a storage frame 3 installed at the edge of a storage opening on a ceiling surface and moves diagonally downward to open and close, and the storage frame 3. A frame side arm 14 whose base end is rotatably pivoted to a suspension fitting 9 provided on the inner surface of the storage lid 4, and a base end thereof is rotatable to a pivot fitting 10 provided on the upper surface of the storage lid 4. It has a lid side arm 15 which is freely pivoted,
A folding link 13 is formed by rotatably connecting the distal ends of the frame side arm 14 and the lid side arm 15, and a folding link 13 is provided above the hinge joint between the lid side arm 15 and the storage frame 3. In a staircase suspension device comprising a hanging spring 6 interposed between a tabular spring holder 8, the tip portions of the frame side arm 14 and the lid side arm 15 forming the folding link 13 are removable. The spring receiver 8 is attached and detached by a detachable tool, and the spring receiver 8 has selection grooves 8a formed in the plate piece thereof, which are horizontally elongated holes arranged in multiple stages above and below, and a lid-side arm 15 of each selection groove 8a. It is characterized in that the end opposite to the side is continuous by a vertical communication groove 8b.

(Example) Hereinafter, the configuration of the present invention will be described in detail using an example shown in FIGS. is attached.

A folding link 13 connects the suspension fitting 9 of the storage frame 3 and the pivot fitting 10 of the storage lid 4.
The frame side arm 14 and the lid side arm 15, which is divided into two long arms 15a and short arms 15b that communicate with each other, are assembled and integrated. What is the long arm 15a?
They are pivotally connected to a suspension fitting 9 and a pivot fitting 10, respectively.

Therefore, the short arm 1 forming the knuckle portion 13a
5b are connected to each other by attachment/detachment tools 16 such as bolts/nuts or snap fasteners at multiple locations (in the illustration, three locations) where they overlap with the long arm 15a, and the tip of the short arm 15b is , the frame side arm 14 is connected by the rivet 17.
It is rotatably connected to the tip of the

Note that the frame side arm 14 is connected to the collar 9 of the suspension fitting 9.
The swing limit of the short arm 15b in the clockwise direction in the drawing is regulated by a, and the swing limit of the short arm 15b in the counterclockwise direction in the drawing is limited by the collar 14a of the frame side arm 14. The opening angle is limited to the swing angle shown in FIG.

Next, the suspension spring 6 has its base end hooked to one of the four upper and lower selection grooves 8a bored in the spring receiver 8, and its tip end to the long arm 1.
It is hung in the hanging hole 15c of 5a. The spring receiver 8 has the selection grooves 8a formed in one plate thereof in the form of horizontally elongated holes in multiple vertical stages, and the end of each selection groove 8a on the opposite side to the lid-side arm 15 is It is continuous by a vertical communication groove 8b.

Next, the function of the staircase equipped with the hanging device of the embodiment constructed in this way is to serve as a passageway for access to the attic in the same manner as in the conventional staircase described above, but in the case of this staircase, When the materials for the stairs are brought to the construction site, the suspension spring 6 is separated into the long arm 15a and the short arm 15b, and the spring receiver 8 and the long arm 15a are separated, as shown in FIG. It is brought in in a pre-multiplied state between.

Therefore, during construction, the storage frame 3 is fixed to the joists 2,
After the installation, when the worker enters the ceiling and joins the short arm 15b and the long arm 15a, the worker grasps the tip of the long arm 15a with his hand and pulls it diagonally upward. Once raised to a required height, the short arm 15b is temporarily fixed, and then the short arm 15b is fastened and connected to the long arm 15a using the attachment/detachment tool 16.

Such operations and work require operating force due to lever action.
In addition to requiring only a small amount of _F2 , it is easy to pull in the direction perpendicular to the arm, and since there are no obstacles in the direction of pulling, it can be operated in a comfortable posture.

In addition, when replacing the suspension spring 6 in the selection groove 8a during construction, once the long arm 15a is separated from the short arm 15b, and the long arm 15a is folded down, the replacement can be easily performed with a small amount of operating force. be.

By the way, in the configuration of the embodiment described above,
In order to make the knuckle portion 13a separable, the lid side arm 15 was formed in parts, but instead of this, the lid side arm 15 is formed as one piece, and the knuckle connection with the frame side arm 14 can be made detachable. Similar actions and effects can be obtained by using attachment/detachment tools such as bolts and nuts.

(Operations and Effects of the Invention) As described above, according to the staircase suspension device according to the present invention, there is a gap between the suspension fitting 9 of the storage frame 3 installed on the ceiling and the pivot fitting 10 of the storage lid 4. The ends of the frame side arm 14 and the lid side arm 15 forming the folding link 13 which are connected to each other so as to be openable and closable,
Since they are connected so that they can be attached and detached using a removable attachment/detachment tool, as shown in FIG. Push down the tip of the hanging spring 6 in the direction of the spring receiver 8 of the storage frame 3.
Both ends of the frame side arm 14 and the lid side arm 1 are hung on the spring holder 8 and the lid side arm 15, and then the lid side arm 15 is pushed up against the tensile elasticity of the suspension spring 6, and the frame side arm 14 and the lid side arm 1 are
By connecting the tip portions of the springs 5 to each other with an attachment/detachment tool, even when a suspension spring 6 with a strong spring force is used, there is an effect that the suspension spring 6 can be easily suspended with a small force due to the lever action.

In addition, the spring receiver 8 on the side of the storage frame 3 is attached to the plate piece.
Selection groove 8a consisting of horizontally long elongated holes in multiple vertical stages
is formed, and the end of each selection groove 8a on the side opposite to the lid side arm 15 is formed into a vertical communication groove 8b.
Therefore, in order to adjust the spring force of the suspension spring 6, when changing one end of the suspension spring 6 to another selection groove 8a, one end of the suspension spring 6 must be moved along the communication groove 8b. It can be moved and changed, and even if the hanging spring 6 is released during this changing, the hanging spring 6 will not spring to the other end and be stepped on, and even if a strong spring is used, the hanging will be easy. This has the effect of making changing work safer and easier.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a staircase suspension device showing an embodiment of the present invention, FIG. 2 is an operation diagram of FIG. 1,
3 is a sectional view taken along the - line in FIG. 2, FIG. 4 is an explanatory diagram of the assembled state shown in FIG. 2, and FIG. FIG. 6 is an explanatory diagram of a state when a conventional staircase is assembled. 1...Ceiling surface, 1a...Storage opening, 3...Storage frame, 4
... Storage lid, 6... Hanging spring, 7... Hinge fitting, 9... Suspension fitting, 10... Pivoting fitting, 13... Link, 13a
...Natsukuru Club.

Claims (1)

[Claims for Utility Model Registration] A storage lid 4 whose one end edge is hinged to one side edge of the lower surface of the inner surface of a storage frame 3 installed at the edge of a storage opening on a ceiling surface and which opens and closes diagonally downward; A frame side arm 14 whose base end is rotatably pivoted to a suspension fitting 9 provided on the inner surface of the storage frame 3 and a base end attached to a pivot fitting 10 provided on the upper surface of the storage lid 4. It has a lid-side arm 15 rotatably pivoted,
A folding link 13 is formed by rotatably connecting the distal ends of the frame side arm 14 and the lid side arm 15, and a folding link 13 is provided above the hinge joint between the lid side arm 15 and the storage frame 3. In a staircase suspension device comprising a hanging spring 6 interposed between a tabular spring holder 8, the tip portions of the frame side arm 14 and the lid side arm 15 forming the folding link 13 are removable. The spring receiver 8 is attached and detached by a detachable tool, and the spring receiver 8 has selection grooves 8a formed in the plate piece thereof, which are horizontally elongated holes arranged in multiple stages above and below, and a lid-side arm 15 of each selection groove 8a. The end of the side opposite to the side of is continuous with a vertical communication groove 8b.