JPH0650073A - Motor-driven ceiling storage ladder - Google Patents

Abstract

PURPOSE:To provide a safe motor-driven ceiling storage ladder by taking the ladder in and out of an attic storage space using a motor, and preventing most part of a mechanism from being exposed to the outside. CONSTITUTION:An upper-stage ladder U is secured to a top board S and a lower-stage ladder D is provided which freely slides in its longitudinal direction while overlapping the upper-stage ladder U. A first and third pulley 4a, 4b are mounted in a hollow upper-stage stanchion U1 along the longitudinal direction of the stanchion and a loop belt 3 is wound to each of the pulleys. An upper part of the lower-stage ladder D is secured 3a to an appropriate portion of the loop belt 3 and a second pulley 6 close to the loop belt 3 is provided in an appropriate portion between both ends of the loop belt 3. A rope 5 which moves together with the loop belt 3 has one end secured 3b to an appropriate portion of the loop belt 3 and the other end of the rope 5 is permitted to be hauled by a hauling electric motor M provided in a storage frame F.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric ceiling stowage ladder which can be moved in and out of an in-ceiling storage cabinet and which is electrically movable and whose operation is extremely smooth and safe.

[0002]

2. Description of the Related Art Heretofore, there have been various types of doors provided with retractable ladders in the door between the storage room above the ceiling and the ceiling, and in recent years, electric type ones have come to exist. However, in the elastic ladder, a wire is often used as a constituent of the elastic function.

[0003]

In the expandable and contractible ladder, wires are mainly used. In many cases, the wires are arranged along the ladder and the wires are exposed to the outside. Not only is the external appearance greatly damaged, but since the wire is exposed to the outside, there is a danger that a part of the human body may be caught when the user moves up and down.

[0004]

In the present invention, the upper ladder is fixed to the lid plate, and the upper ladder is provided with a lower ladder that is superposed and slidable in the longitudinal direction, and the upper ladder is hollow. A first pulley and a third pulley are provided in the upper column along the longitudinal direction thereof, and the loop belt is attached to the first column.
A second pulley, which is constructed by winding around a pulley and a third pulley, fixes an upper part of a lower ladder to an appropriate position of the loop belt, and is close to the loop belt at an appropriate position between both ends of the loop belt. An electric ceiling storage in which one end of a cord that moves together with the loop belt is fixed to an appropriate position of the loop belt inside the upper strut, and the other end can be wound up by a winding motor provided in a storage frame. Due to the work done by the ladder, many parts of the wire of the device in the expansion and contraction of the door and the ladder are not exposed to the outside, and the above problems are solved.

[0005]

Embodiments of the present invention will now be described with reference to the drawings. As shown in FIG. 1 to FIG.
A storage frame F is provided, and a lid plate S that can be opened and closed from one side is attached to the storage frame F, an upper ladder U and a lower ladder D are provided on the lid plate S, and the upper ladder U is attached to the lid plate S. It is fixed and the upper ladder U to the lower ladder D
Is to slide.

The upper ladder U is fixed to the plate surface of the lid plate S, the upper ladder U also moves as the lid plate S is opened and closed, and the upper column U1 of the upper ladder U has a substantially L-shaped cross section. As shown in FIGS. 4 (a) and 4 (b), it has a long housing shape and is composed of a mechanism chamber 1 and a guide rail portion 2, and a winding transmission body W is mounted in the mechanism chamber 1. The loop transmission 3 of the winding transmission body W is freely rotatable by the first pulley 4a and the third pulley 4b,
There are various embodiments of the loop belt 3, but a timing belt, a chain, or other loop-shaped one is used.

As shown in FIGS. 4 and 7, the upper portion of the lower ladder D is located on the loop belt 3 of the winding transmission body W.
It is fixed 3a, and when the loop belt 3 rotates, the lower ladder D is pulled up or down by the loop belt 3.

One end of a cord 5 such as a wire is fixed to the loop belt 3 and the cord 5 is also folded back at a first pulley 4a portion on one end side in the longitudinal direction of the loop belt 3 and The rope 5 is pulled out of the upper portion of the upper column U1 through the second pulley 6 from the substantially central portions on both ends of the loop belt 3.

The upper portions of the lower columns 8 and 8 of the lower ladder D are fixed to the loop belt 3, and more specifically, the upper side of the loop belt 3 (outward as viewed from the lid plate S). ), And the lower ladder D moves until the upper end of the lower ladder D coincides with the upper end of the upper ladder U and overlaps (see FIGS. 2 and 3).

The lower ladder D is slidably moved along the guide rail portion 2 of the upper ladder U, and more specifically, the guide roller bodies G and G are respectively attached to the upper ladder U and the lower ladder D. It is fixed so that the slide of the lower ladder D is extremely smooth.

As shown in FIG. 8, the guide roller body G is provided with a plurality of rollers 10, 10, ... On the bearing portion 9, and the guide roller body G has an upper stage on the upper ladder U. It is provided at the lower end of the columns U1 and U1,
Further, the lower ladder D is provided at the upper end portion of the lower column 8 thereof, and the rollers 10, 10, ...
As shown in (a) and (b), they are provided so as to face each other.

Further, the rollers 10, 10, ... Of the guide roller body G on the lower ladder D side can be accommodated in the guide rail portion 2 of the upper support U1 and move in the guide rail portion 2. Specifically, a guide groove 2a is formed in the guide rail portion 2, a bearing portion 9 penetrates the guide groove 2a, and guide edges 2b, 2b on both sides of the guide groove 2a are formed. The rollers 10, 10,
... rotate while contacting each other, and when the lower ladder D is fixed 3a to the loop belt 3 of the upper ladder U, as shown in FIG. 6 (a), the loop belt is passed through the guide roller body G. It is preferable that it is fixed to 3 and fixed to 3a.

Further, the rollers 10, 10, ... Of the guide roller body G fixed to the upper ladder U side are installed in the lower support column 8 of the lower ladder D, specifically, the lower support column 8
On the side surface facing the upper ladder U, a guide groove 8a is formed similarly to the guide rail portion 2 of the upper pillar U1, and guide edges 8b, 8b are formed on both sides of the guide groove 8a.
The bearing portion 9 of the guide roller body G penetrates the guide groove 8a, and the rollers 10, 10, ... Rotate while contacting the guide edges 8b, 8b.

As described above, the upper ladder U and the lower ladder D
The guide roller body G is not exposed to the outside because the rollers 10, 10, ... Of the guide roller body G are inside each other, and the upper ladder U and the lower ladder D are superposed. can do.

The rope 5 is formed by the upper column U of the upper ladder U.
From the middle portion of 1 through the second pulley 6 and through the through hole 7 formed in the mechanism chamber 1, the cord 5 exits to the outside, and the cord 5
The other end side of is wound around the drum Md of the electric motor M, the fourth pulley 11 is provided in the storage frame F described above, and is wound around the drum Md via the fourth pulley 11.

The storage frame F is composed of a ladder storage portion 12 and an electric motor chamber 13, and in the electric motor chamber 13, as shown in FIG. 9, a cylindrical hollow rotary hollow shaft having a drum Md fixed to the outer peripheral side surface. 14 and the electric motor M are accommodated, the output shaft of the cylindrical electric motor M is fixedly mounted in the rotary hollow shaft 14, and the end portion of the electric motor M is fixed to the side wall on one end side of the electric motor chamber 13. In addition, the end of the rotary hollow shaft 14 is
The rotary hollow shaft 14 is rotatably pivotally attached to the other side wall surface and is rotated when the electric motor M is started.

First, when the lid plate S is opened with respect to the ceiling portion C, the guide roller bodies G, G are in close proximity to the lower end portion of the upper ladder U on the lid plate S. The lower ladder D and the loop belt 3 are fixed to each other at a lower portion of the upper ladder U, and the user can move the lower ladder D and the upper ladder U up and down.

Next, when the lid plate S is closed to the ceiling portion C, when the electric motor M is started, the drum Md is rotated together with the rotary hollow shaft 14 to wind the rope 5, and the lid plate S and the upper ladder U are rotated. Assuming that the weight of the lower ladder is heavier than the weight of the lower ladder D, the rope 5 first rotates the loop belt 3 via the second pulley 6 as shown in FIGS. The fixed lower ladder D starts to rise along the upper column U1 of the upper ladder U as the loop belt 3 rotates, and when the lower ladder D is superposed on the upper ladder U, the lower ladder D is fixed to the side of the guide. When the roller body G comes into contact with the top of the upper column U1 and the lower ladder D stops rising, the rotation of the loop belt 3 also stops, and as the winding of the rope 5 continues, the lid plate S moves up and the ceiling C Closed letter It stops in a state.

[0019]

According to the present invention, the upper ladder U is fixed to the lid plate S, and the upper ladder U is provided with the lower ladder D which is superposed and slidable in the longitudinal direction, and the upper ladder U is provided.
The hollow upper pillar U1 is provided with the first pulley 4a and the third pulley 4b along the longitudinal direction thereof, and the loop belt 3 is wound around the first pulley 4a and the third pulley 4b.
The upper portion of the lower ladder D is fixed 3a at an appropriate position of the loop belt 3, and a second pulley 6 is provided at an appropriate position between both ends of the loop belt 3 in the vicinity of the loop belt 3, An electric ceiling in which one end of the rope 5 which moves together is fixed 3b to an appropriate position of the loop belt 3 inside the upper column U1 and the other end can be wound by a winding electric motor M provided in the storage frame F. The storage work has various effects such as first that it can be used safely by the user, and secondly that it can be made excellent in appearance.

To explain the above effect in detail, the lower ladder D that slides with respect to the upper ladder U fixed to the lid plate S is
This is performed by rotating the loop belt 3 wound around the first pulley 4a and the third pulley 4b mounted on the hollow upper column U1 of the upper ladder U, and the loop belt 3 is formed by the rope 5 Is rotated up and down by the electric motor M to rotate together with the loop belt 3 in a predetermined range, and the loop belt 3, the first pulley 4a, the third pulley 4b and the second pulley 6 are hollow upper stages. Since it is installed inside the column U1 and is not exposed to the outside, there is no risk of the user hitting or being caught in the main mechanical parts such as the loop belt 3 and the user's safety is ensured. is there.

Further, the cord 5 is provided with a second pulley 6 at an appropriate position between both ends of the loop belt 3 in the upper column U1.
Since the rope 5 that moves in a predetermined range together with the loop belt 3 can be maintained at a position as close to the rope 5 as possible by the second pulley 6, the loop belt 5 can be provided without giving unnecessary load to the rope 5. The reliable operation of 3 can be maintained.

Next, the loop belt 3, the first pulley 4a, the third pulley 4b, and the second pulley 6 are installed in the hollow upper column U1, and the upper ladder U, the lower ladder D,
Alternatively, from the lid plate S to the loop belt 3, the first pulley 4
Since the mechanical parts such as a, the third pulley 4b, and the second pulley 6 are not exposed to the outside, the upper ladder U and the lower ladder D are orderly and can have an excellent appearance.

[0023]

[Brief description of drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a side view of the present invention.

[Figure 3] Side view of the state where the ceiling door is stored

FIG. 4A is a side view showing a state of an upper ladder and a lower ladder. FIG. 4B is a cross-sectional view of a main portion of the upper ladder and the lower ladder.

FIG. 5 is a sectional view showing an operating state.

FIG. 6 is a cross-sectional view of main parts of the upper ladder and the lower ladder.

FIG. 7 is a perspective view of an essential part of the present invention.

FIG. 8 is a perspective view of a guide roller body.

FIG. 9 is a schematic plan view of an electric motor room.

[Explanation of symbols]

 S ... Lid plate U ... Upper ladder U1 ... Upper strut 3 ... Loop belt 3a ... Fixed 3b ... Fixed 4a ... 1st pulley 4b ... 3rd pulley 5 ... Rope 6 ... 2nd pulley D ... Lower ladder M ... Electric motor F ... Storage frame

Front page continuation (72) Inventor Daisuke Hozumi 2-1-1, Nishishinjuku, Shinjuku-ku, Tokyo Sanwa Shutter Industry Co., Ltd.

Claims (1)

[Claims] 1. An upper ladder is fixed to a lid plate, a lower ladder is provided on the upper ladder that is superposed and slidable in the longitudinal direction, and the hollow upper pillar of the upper ladder extends along the longitudinal direction. A first pulley and a third pulley, and a loop belt wound around the first pulley and the third pulley.
One end of the rope that moves together with the loop belt is fixed to the loop belt at an appropriate position above the lower ladder, and a second pulley is provided near the loop belt at an appropriate position between both ends of the loop belt. An electric ceiling storage ladder characterized in that the above is secured inside the upper column at an appropriate position of the loop belt, and the other end can be wound up by a winding electric motor provided in a storage frame.