JP2000291356A - Height adjustment device for the lower end of the folding ladder of the ladder device of the storage room above the ceiling - Google Patents

Abstract

(57) [Problem] To make lower ends of left and right side plates (18) of a folding ladder (4) abut on a floor surface. SOLUTION: At a construction site, an operator uses a required number of spacers 23, and in some cases does not use the cover 22 at all, in response to the unevenness of the floor surface of the construction site. The three ladder components 14 are attached to the lower ends of the left and right side plates 18 with screws 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height adjusting device for a lower end of a folding ladder of a ladder device of a storage room above a ceiling.

[0002]

2. Description of the Related Art The following is known as a conventional ladder device for a storage room above a ceiling. A horizontal fixed frame, a lid provided on the fixed frame so as to be swingably openable and closable, and a folding ladder provided on an upper surface of the lid, wherein the folding ladder is provided on an upper surface of the lid. A first ladder component attached via a required number of connectors, a position at the lower end of the first ladder component that is folded over the first ladder component and connected to the first ladder component; A second ladder component provided via a pair of left and right hinges so as to be able to swing between the second ladder component and a lower end of the second ladder component. And a third ladder component provided via a pair of left and right hinges so as to be swingable between a position to be connected to and a position connected to the second ladder component. Are a pair of left and right side plates, Those having a tread of the required stage was stopped passing the plate is known. When the folding ladder is extended, the lower end surfaces of the left and right side plates of the third ladder component can be brought into contact with the uneven (floating up and down) floor surface, The attachment position to the lid can be adjusted.

[0003]

Disadvantages of the prior art The above-mentioned conventional ladder device for a storage room above the ceiling has the following disadvantages. For example, when the floor surfaces on which the lower end surfaces of the left and right side plates of the third ladder component member (the lowermost ladder component member) abut are inclined in the direction of the left and right side plates, for example, Even if the position of attachment to the lid is adjusted, there is a disadvantage that the entire lower end surfaces of the left and right side plates of the third ladder component cannot be brought into contact with the floor surface.

[0004]

The present invention employs the following means to solve the above-mentioned drawbacks. According to a first aspect of the present invention, the folding ladder includes a cover fitted to the lower end of the side plate, and at least one spacer inserted into the cover. According to a second aspect of the present invention, the cover is made of a soft synthetic resin.

[0005]

According to the present invention, the following effects can be obtained by the above configuration. According to the invention of claim 1, a spacer is inserted into the cover at the lower end of the side plate of the lowermost ladder component as necessary, and the cover is fitted to the lower end of the side plate of the lowermost ladder component. Thereby, the height position of the lower end of the folding ladder can be easily adjusted. According to the invention of claim 2, since the cover is made of a soft synthetic resin, the floor surface is not damaged.

[0006]

Embodiments of the present invention will be described below. In this description, the front means the right side of FIG. 1, the rear means the left side, the left means the back side of FIG. 1, and the right means the front side.

[0007] The ladder device 1 of the storage room above the ceiling is provided with a ceiling plate 26.
A fixed frame 2 fixed to the edge of an opening 27 (opening 27 for reaching the storage space above the ceiling), a lid 3 provided on the fixed frame 2 so as to be swingable in the vertical direction, and And a folding ladder 4 provided on the upper surface of the lid 3.

The rectangular fixed frame 2 has a pair of left and right frame members 6 whose longitudinal direction is oriented in the front-rear direction, and a pair of front and rear frame members 7 whose longitudinal direction is oriented in the left-right direction. The length of the front and rear frame members 7 is about half the length of the left and right frame members 6. The lid 3 is vertically openable and closable on a front frame member 7 via a hinge 8. When the lid 3 is closed, an engaging member of a known locking device (not shown) for locking the lid 3 to the fixed frame 2 has a free end of the lid 3 and a receiving member of the engaging member has a rear side. It is provided on the frame member 7.

The folding ladder 4 includes a first ladder component 12 attached to the upper surface of the lid 3 via a required number of connecting members 11, and a lower end of the first ladder component 12 having the first ladder component. A second ladder component 13 provided via a pair of left and right hinges 17 so as to be swingable between a position where the member 12 is folded in a form overlapping the first ladder component 12 and a position connected to the first ladder component 12; This second ladder component 13
A pair of hinges 17 is provided at the lower end of the pair of left and right hinges 17 so as to be swingable between a position at which the second ladder component 13 is folded in a manner overlapping the second ladder component 13 and a position connected to the second ladder component 13.
And the third ladder component member 14 provided through the ladder.

The first ladder component 12, the second ladder component 13 and the third ladder component 14 are each composed of a pair of left and right side plates 18 parallel to the left and right frame members 6 when viewed from a plane. And a tread 19 of a required step which is held between the pair of left and right side plates 18. The folded ladder 4 in the folded state enters the fixed frame 2 from below.

The lid 3 and the left and right frame members 6 have a pair of left and right link mechanisms 15 each having a stopper mechanism (not shown) for preventing the lid 3 from swinging beyond a predetermined opening position when the lid 3 is opened. Is passed to the link mechanism 15 and the frame member 6, and the lid 3
A pair of left and right springs 16 for urging in the closing direction is passed. The spring 16 prevents the lid 3 from suddenly opening downward, and does not have a spring force enough to close the opened lid 3.

A height adjuster 21 is attached to each lower end of the side plate 18 of the third ladder component 14. The height position adjuster 21 is a cover 2 made of a soft or hard synthetic resin, which is fitted to the lower end of the side plate 18.
2, three spacers inserted into the cover 22, and screws 24 for fixing the cover 22 and the spacer 23 to the side plate 18. The cover 22 is
It has a bottom wall and front, rear, left and right side walls. Also,
The thickness of the spacer 23 is about 3 mm, but is not limited thereto. Further, through holes are formed in the bottom walls of the spacer 23 and the cover 22 for screws 24. At the time of shipment from the factory, about 3 to 6 spacers 23, two covers 22 (corresponding to the left and right side plates 18), two screws 24,
The ladder device 1 is simultaneously packed. At the construction site, the worker uses the required number of spacers 23, and in some cases, does not use the cover 22 in accordance with the unevenness of the floor surface of the construction site, and attaches the cover 22 to the third ladder component member. 14 are attached to the lower ends of the left and right side plates 18 with screws 24. By doing so, the lid 3 is opened and the folding ladder 4
Are extended, the left and right covers 2 of the third ladder component 14 are
The entire lower end surface of the second unit 2 can be brought into contact with a floor surface with unevenness.

[0013]

[Modifications and the like] Modifications and the like will be described below. (1) The material of the cover 22 is arbitrary. (2) The cover 22 may be attached to the side plate 18 by bonding or the like. (3) The folding ladder 4 may not have the third ladder component 14 in some cases. In that case, the second ladder constituent member 13 is the lowermost ladder constituent member.

[Brief description of the drawings]

FIG. 1 is a side view of a partially crushed embodiment showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a part A in FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ladder apparatus 4 Folding ladder 14 Third ladder constituent member 18 Side plate 21 Height adjuster 22 Cover 23 Spacer 24 Screw

Claims (2)

[Claims] 1. A lower end of a folding ladder of a ladder device of a storage room above a ceiling having a cover fitted to a lower end portion of a side plate of the folding ladder and at least one spacer inserted into the cover. Height adjuster. 2. A height adjusting device according to claim 1, wherein said cover is made of a soft synthetic resin.