JPH1061358A - Ceiling-enclosed ladder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance safety by eliminating a difference in height between a ladder and the floor face of a loft. SOLUTION: This ceiling-enclosed ladder 21 has a ceiling lid 5 freely rotationally attached to the edge 4 of an opening 3 formed in a ceiling 2, to close the opening 3, and has a ladder main body 6 installed on the back of the ceiling lid 5. An auxiliary ladder 22 is freely rotationally connected to the ceiling end of the ladder main body 6 and is allowed to freely slide on an opening frame 31 encircling the opening 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling storage ladder for ascending to a storage space installed behind a ceiling.

[0002]

2. Description of the Related Art By installing a storage space in an attic space of a detached house or an apartment house, an unused attic space can be effectively used and the storage space can be increased. A ceiling storage ladder as shown in FIG. 3 is often used.

[0003] As can be seen from the figure, a conventional ceiling storage ladder 1 has a ceiling lid 5 for closing the opening 3 rotatably attached to an edge 4 of an opening 3 formed in the ceiling 2. The ladder main body 6 is installed on the back surface of 5.

The ladder main body 6 includes an upper ladder 6a fixed to the back surface of the ceiling lid 5 via a fixing hardware 9, a middle ladder 6b mounted below the lower ladder 6c, and a lower ladder 6c mounted further below the lower ladder 6c. And each of them is constructed by spanning a stepping bar 8 between a pair of longitudinal members 7 and 7,
The vertical members 7 adjacent to each other at the top and bottom are connected to each other by hinges 10, and in this figure, the lower ladder 6c is rotated counterclockwise to fold it to the right of the middle ladder 6b, and these are collectively clockwise. The upper ladder 6a can be rotated to be folded to the left side.

In such a ladder 1 for storing a ceiling, the ladder main body 6 is normally folded, and then the ceiling lid 5 is lifted upward and locked at an opening closing position by a locking mechanism (not shown). When the locking mechanism of the ceiling lid 5 is released and the ceiling lid 5 is rotated downward and the ladder main body 6 is deployed as shown in FIG. 3, the ladder main body 6 is opened at the upper end by the opening edge 4. At the lower end, it is supported by a link mechanism (not shown) that suspends the opening lid 5 from the ceiling in the middle part, and can be used as a normal ladder to rise above the ceiling. it can.

[0006]

Here, in the conventional ceiling storage ladder 1, whether it is a foldable type or a telescopic type as shown in FIG. 3, the installation height of the top stepping bar 8a is at most near the ceiling. Stay in.

[0007] For this reason, a height difference as shown by an arrow in the figure, and in some cases, a height difference of about 450 mm may occur between the step bar 8a and the floor surface 11 of the attic. Considering that there are many ups and downs, there is room for improving the safety especially when getting off.

The present invention has been made in view of the above circumstances, and has as its object to provide a ceiling storage ladder capable of improving the safety by eliminating a height difference from an attic floor surface. I do.

[0009]

In order to achieve the above object, a ceiling storage ladder according to the present invention has a ceiling lid for closing an opening formed at an edge of an opening formed in a ceiling. In a ceiling storage ladder which is rotatably mounted and has a ladder main body installed on the back surface of the ceiling lid, an auxiliary ladder is rotatably connected to a ceiling side end of the ladder main body and surrounds the auxiliary ladder around the opening. It is configured to be slidable with respect to the opening frame.

Further, in the ceiling storage ladder of the present invention, a predetermined spring mechanism is provided between the ladder main body and the auxiliary ladder, and the auxiliary ladder is rotated to the sliding surface side of the opening frame. It is what was constituted.

In the ceiling storage ladder of the present invention, when the stored ladder main body is rotated downward together with the ceiling lid,
The auxiliary ladder connected to the ladder main body rotates around the ladder main body while sliding downward on the opening frame by its own weight,
Eventually, it will be in line with the ladder body.

In such a state, the step of the auxiliary ladder is added as a new step above the ladder main body, and it is generated between the uppermost step of the ladder main body and the floor above the ceiling. The height difference is eliminated.

On the other hand, when the ladder main body is turned upward together with the ceiling lid, the auxiliary ladder is rotated around the ladder main body while being lifted by the opening frame while sliding upward on the opening frame.

Here, when a predetermined spring mechanism is provided between the ladder main body and the auxiliary ladder, and the auxiliary ladder is configured to rotate toward the sliding surface side of the opening frame, the auxiliary ladder includes: When the ladder main body is turned downward, the ladder body turns smoothly and reliably to the sliding surface side of the opening frame.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a ceiling storage ladder according to the present invention will be described below with reference to the accompanying drawings. It is to be noted that the same reference numerals are given to components and the like that are substantially the same as those in the conventional technology, and description thereof will be omitted.

FIG. 1 is a side view showing a ladder for storing ceilings according to the present embodiment. As can be seen from the figure, the ceiling storage ladder 21 of the present embodiment has a ceiling lid 5 that closes the opening 3 rotatably attached to the edge 4 of the opening 3 formed in the ceiling 2 as in the prior art, Although the ladder main body 6 is installed on the back surface of the ceiling lid 5, in this embodiment, an auxiliary ladder 22 is rotatably connected to the ceiling side end of the ladder main body 6 via a hinge 23.

The auxiliary ladder 22 is similar to the upper ladder 6a and the like.
Although the step 8b is bridged between the pair of vertical members 7b, 7b, as shown in the detailed view of FIG. 2 (a), a rounded portion 32 is formed at the upper end corner of the vertical member 7b. By
It can slide smoothly on the opening frame 31 surrounding the opening 3.

In fixing the upper ladder 6a of the ladder main body 6 to the back surface of the ceiling lid 5, it is preferable to use a supporting metal 25 having a size and strength larger than those of the conventional supporting metal 9. With this configuration, it is possible to widen the distance between the ladder main body 6 and the ceiling lid 5 and bring the installation position of the step bar 8b sufficiently close to the floor surface 11 behind the ceiling.

A coil spring 24 as a spring mechanism is mounted between the vertical member 7 of the ladder main body 6 and the vertical member 7b of the auxiliary ladder 22, and the auxiliary ladder 22 is rotated toward the sliding surface of the opening frame 31. It is made to let.

In the ceiling storage ladder 21 of the present embodiment, the step 8b of the auxiliary ladder 22 is added as a new step above the ladder main body 6, as can be clearly seen from FIG. The height difference between the top stepping bar 8a of the ladder body 6 and the floor surface 11 behind the ceiling is eliminated.

In order to store the ceiling storage ladder 21, the ladder main body 6 in the expanded state is first folded, and then rotated upward together with the ceiling lid 5. Then
The auxiliary ladder 22 pivots around the ladder main body 6 so as to be raised by the opening frame 31 while sliding upward on the opening frame 31 as shown in FIG. It is stored in a bent state. Finally, the ceiling lid 5 is locked at the ceiling opening 3 by a locking mechanism (not shown) and held at this position.

On the other hand, in order to bring the ceiling storage ladder 21 into the use state as shown in FIG.
First, the locking mechanism (not shown) holding the ceiling lid 5 at the ceiling opening 3 is released, and the ceiling lid 5 is rotated downward together with the ladder main body 6 installed on the back side.

Then, the auxiliary ladder 22 connected to the ceiling side end of the ladder main body 6 moves on the opening frame 31 by its own weight and the action of the coil spring 24 in conjunction with the downward rotation of the ceiling lid 5. It pivots around the ladder main body 6 while sliding downward, and eventually, is aligned with the ladder main body 6 as shown in FIG.

Next, the ladder main body 6 in the folded state is unfolded as shown in FIG.

As described above, according to the ceiling storage ladder 21 of the present embodiment, the step bar 8b of the auxiliary ladder 22 is connected between the top step bar 8a of the ladder main body 6 and the floor 11 above the ceiling. By interpolating, the height difference, which was about 450 mm in the past, is reduced to about the normal kick-up of the tread. Therefore, it is easy to ascend and descend in the vicinity of the floor above and below the ceiling, and the safety particularly when getting off with carrying luggage is improved.

Since the auxiliary ladder 22 is rotatably connected to the ladder main body 6 and is slidable with respect to the opening frame 31, the auxiliary ladder 22 is interlocked with the turning operation of the ladder main body 6. It rotates around the ladder main body 6 while sliding on the opening frame 31. Therefore, there is no need to perform any special operation when using the auxiliary ladder 22, and the deployment and storage of the auxiliary ladder 22 can be automatically performed simply by rotating the ladder main body 6 in the same manner as in the related art.

Further, since the coil spring 24 is mounted between the ladder main body 6 and the auxiliary ladder 22, the auxiliary ladder 22 can smoothly and surely slide the opening frame 31 when the ladder main body 6 is rotated downward. It turns to the surface side. Therefore, at the stage when the downward operation of the ladder main body 6 is completed, the auxiliary ladder 2
2 is in line with the ladder main body 6, and can be used immediately without any special operation.

In the present embodiment, the auxiliary ladder 22 is smoothly and reliably rotated toward the sliding surface of the opening frame 31 by installing the coil spring 24. However, the auxiliary ladder 22 is naturally rotated by its own weight. If it is possible, the coil spring 24 may be omitted.

In this embodiment, the ladder main body is of a folding type. However, the present invention is not limited to this type, and an extension type may be used instead.

The pivot structure between the ladder main body 6 and the auxiliary ladder 22 can be variously modified. For example, the vertical member 7 of the ladder main body 6 and the vertical member 7b of the auxiliary ladder 22 are hinged. You may do so. Also, the structure and shape of the spring mechanism can be variously modified, and a leaf spring may be used instead of the coil spring. In connection with the above-described rotating structure, a hinge with a built-in spring may be used. You may.

In the present embodiment, the connecting structure between the ladder main body 6 and the auxiliary ladder 22 is a connecting structure in which the auxiliary ladder 22 cannot rotate from the linear position as shown in FIG. If the auxiliary ladder 22 is horizontally supported on the contact surface of the opening frame 31, there is no need to limit the rotation range of the auxiliary ladder 22. Conversely, if the auxiliary ladder 22 and the ladder main body 6 have a connection structure that does not rotate to the opposite side as in this embodiment, it is not necessary to make the auxiliary ladder 22 abut on the opening frame 31 during normal use. Absent.

[0032]

As described above, in the ceiling ladder according to the present invention, the ceiling lid for closing the opening is rotatably attached to the edge of the opening formed in the ceiling. A ceiling storage ladder in which a ladder main body is installed on the back surface of the ceiling lid, an auxiliary ladder is rotatably connected to a ceiling side end of the ladder main body, and the auxiliary ladder is placed on an opening frame surrounding the opening. Since it is configured to be slidable, it is possible to eliminate the height difference from the attic floor surface and enhance the safety.

[0033]

[Brief description of the drawings]

FIG. 1 is a side view of a ceiling storage ladder according to the present embodiment.

FIGS. 2A and 2B are detailed views of a ceiling storage ladder according to the present embodiment, wherein FIG. 2A is a view when the ladder main body 6 is rotated downward to be in use, and FIG. FIG.

FIG. 3 is a side view of a prior art ceiling storage ladder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 Ceiling 3 Ceiling opening 4 Opening edge 5 Ceiling lid 6 Ladder main body 11 Ceiling floor floor 21 Ceiling storage ladder 22 Auxiliary ladder 24 Coil spring (spring mechanism) 31 Opening frame

Claims (2)

[Claims] 1. A ceiling storage ladder in which a ceiling lid for closing the opening is rotatably attached to an edge of the opening formed in the ceiling, and a ladder main body is installed on the back surface of the ceiling lid. An auxiliary ladder is rotatably connected to a side end, and the auxiliary ladder is configured to be slidable with respect to an opening frame surrounding the opening. 2. The ceiling according to claim 1, wherein a predetermined spring mechanism is provided between the ladder main body and the auxiliary ladder so as to rotate the auxiliary ladder toward a sliding surface of the opening frame. Ladder for storage.