JP2952646B2 - Folding ceiling storage ladder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable ceiling storage ladder which is folded and stored in a storage frame provided on a ceiling when not in use, and which is lowered and extended from inside the storage frame when used. .

[0002]

2. Description of the Related Art Generally, ceiling storage ladders are of a folding type, a combination type using folding and sliding, and a sliding type. In each case, a ladder body consisting of two or three pieces also serves as an entrance fixed to the ceiling. The storage box is placed on a lid that is pivotally attached to the storage box, and when used, the lid is opened and the overlapping ladder is unfolded or extended and its free end is placed on the floor. Although it is configured to support, the height of the ceiling with respect to the floor on which these ceiling storage ladders are erected varies by about 20 to 30 cm depending on the residential building, and is not constant.

In the case where the height is different as described above, if the folding type and the sliding type are used together or the sliding type is used, the total length of the ladder can be adjusted by sliding even if the opening angle of the lid is constant. It is possible to adjust,
In the case of a foldable ceiling storage ladder, since the total length of the deployed state of the foldable ladder is constant and cannot be adjusted, the ladder must be able to accommodate differences in height. The length is designed assuming the highest overall height of the ceiling.

[0004]

However, in the case of the above-mentioned foldable ceiling storage ladder, if it is installed between the ceiling and the floor in the same state, if the ceiling height is lower than the assumed height, The angle of the ladder that is expanded and extended is smaller than the angle of inclination of the lid with respect to the floor surface, and the hinged part is bent in a folded state where the ladder body is downwardly convex and safe. Because we can not secure the nature
There is a problem to be solved in that the tip of the ladder must be cut off at the site so that the ladder is installed straight.

[0005] The present invention is Nakara a folding roof housing ladder, without cutting the tip portion of the bottom ladder for length adjustment in the field, a ceiling housing ladder can be placed in a safe erection state It is intended to provide.

[0006]

According to the present invention, one end of a lid 2 is rotatably supported on one end of a storage frame 1 fixed to a ceiling opening, and the other end of the lid 2 is rotatably supported. And the storage frame 1
And a link for changing and setting the opening inclination angle of the lid 2.
The angle adjustment means is provided by connecting the upper and lower surfaces of the lid 2
The middle ladder 24 which is formed by connecting the lower ladder 26 to the lower fold
22 supports the upper ladder 22 of the folding ladder B connected upward.
The locking device 11 is installed at the center of the free end of the lid 2.
In the state where the folding ladder B is stored in the storage frame 1, the lid 2
In folding ceiling housing ladder for closing lock, open
The upper part of the folding ladder B along the inclination direction of the lid 2
The fixing position of the ladder 22 is fixed to the upper surface of the lid 2.
Utilizing the adjustment slit 9 of the tool 10
Tilt direction adjustment means that can be adjusted within the range,
Angle of link length by step change of link length by link connection
Angle adjusting means by means of the stepwise change.
The step is pulled on the support bracket 4 fixed to the lid 2.
A plurality of adjusting holes 37 for adjusting and setting the strength are provided.
The lid-side pivot link 7 is pivotally connected, and the lid-side pivot link 7 is
Turn one of the plurality of adjustment holes 37 and the storage frame 1
A hook connected by an opening / closing auxiliary spring 5 having a
Equipped with a tensile strength adjusting means that can adjust the tensile strength
And a free end of the lid side pivot link 7.
And welded to the lower end of the frame-side pivot link 6 formed in the shape of a handrail
Arm bracket 15 with the link pivot shaft 16
The arm bracket 15 has a support shaft 1 attached thereto.
Insert the insertion pin 13 on a predetermined radius line around the hole through which
To see the pin hole 14 for setting and the following setting display characters 39
Bored a window opening 38 that, on the arm bracket 15, the circumferential
Locking teeth 18 with four teeth with different radii on the edge and one piece joined
A number of setting pin holes 20 corresponding to the number of teeth 19 and each tooth;
The same number of setting display characters 39 are set on the concentric circle of the predetermined radius.
The girder angle adjusting plate 30 is pivotally mounted on the support shaft 17 and the lid
One of the engagement teeth 18 engages with one of the locking teeth 18.
Is provided with a concave portion 31 for engaging with any one of the locking teeth 18.
And an angle changing means for causing the tilt
Where oblique direction adjusting means and tensile strength adjusting means are provided
In cooperation with angle adjustment means by stepwise changing the link length.
A foldable ceiling storage ladder characterized by being configured to be moved .

[0007]

The folding ceiling storage ladder according to the present invention constructed as described above is provided with an angle adjusting means for changing and setting the inclination angle of the lid at a part of the limited link mechanism. If the inclination angle of the lid is set according to the above, without cutting the line end of the lower ladder, the connecting part will not be bent in the concave state and the straight part between the ceiling and the floor surface it is to act so that it can be laid. in particular, the lid 2
To change and set the open tilt angle, adjust the tilt direction
Step and tensile strength adjustment that allows adjustment of tensile strength
In cooperation with the stepwise changing angle adjusting means provided with the knot means, the supporting bracket 4 fixed to the lid 2 is pulled
A plurality of adjustment holes 37 for adjusting and setting the
The lid-side pivot link 7 is pivoted, and the lid-side pivot link 7
Turn any one of the plurality of adjustment holes 37 and the storage frame 1
A pull connected by an opening / closing auxiliary spring 5 having a buckle 35
Tensile strength adjusting means that can adjust the tensile strength
Stepwise change of the link length by the link connection provided
Since the angle adjustment means is further provided , the workability at the site can be improved, and the set angle can be reliably maintained, and safety during use can be ensured. The cooperation of allows fine adjustment of the height in a stable state.

[0008] Further, the angle adjusting means by link connection is a step.
It is an angle adjustment means by changing the floor and fixed to the lid 2
To adjust and set the tensile strength of the support bracket 4
Pivot the cover side pivot link 7 the adjusting holes 37 bored number of multiple of
Of the plurality of adjusting holes 37 of the lid side pivot link 7
Open the crawler and the storage frame 1 with the turnbuckle 35
You can adjust the tensile strength connected by the closing auxiliary spring 5
And a cover for adjusting the tensile strength.
The free end of the body-side pivot link 7 and the handrail-shaped frame
Arm bracket 15 welded to lower end of pivot link 6
Are pivotally connected by a link pivot shaft 16, and the arm
The bracket 15 has a predetermined half around the hole through which the support shaft 17 passes.
Pin hole 14 for inserting insertion pin 13 on the diameter wire and lower
A window hole 38 for visually recognizing the setting display characters 39 is formed.
Four teeth with different radii on the periphery of the arm bracket 15
The number of locking teeth 18, the number of connecting teeth 19, and the number of teeth
Number of setting pin holes 20 and the same number of setting display characters 39
The angle adjusting plate 30 provided on the concentric circle having the predetermined radius is
At the same time as being pivoted on the shaft 17,
One of the concave portions 31 with which any of the locking teeth 18 mesh
The length can be easily set by engaging or locking with an insertion pin, so that workability at the site can be improved. Thus, the maintenance of the set angle is ensured, and safety during use can be ensured.

[0009]

Embodiment 1 Next, Embodiment 1 of a folding ceiling storage ladder of the present invention.
FIG. 1 shows a foldable ceiling storage ladder, in which a storage frame 1 and a lid 2 are connected to open a ladder support A and a folded ladder B in a folded state. 2 is a schematic front view of the same, FIG. 3 is an enlarged side view of an exploded state of an angle adjusting portion, and FIG. 4 is an explanatory diagram of angle adjustment.

As shown in FIGS. 1 and 2, the ladder support A is provided with a lid 2 which is openable and closable by a main hinge 3 at one end of an opening of a storage frame 1 fixed to a ceiling opening. Frame 1
And the support bracket 4 fixed to the free end of the lid 2,
An opening / closing auxiliary spring 5 having a turnbuckle 35 using a tension coil spring, a gas spring, or the like, and a frame-side pivot link 6 formed in a handrail shape and a bending link 8 pivotally connected to a lid-side pivot link 7 are connected. Supporting the lid 2, the lid 2
A fixing bracket 10 provided with an adjusting slit 9 so that the fixing position can be adjusted along the inclination direction for fixing an upper ladder 22 constituting a folding ladder B described later is fixed to the upper surface of the free end portion. Is provided with a lock device 11.

A plurality of adjustment holes 37 for adjusting and setting the tensile strength of the opening / closing auxiliary spring 5 are formed in the lid-side pivot link 7, and are provided at the ladder installation site due to the preparation of tools and the like. The tensile strength of the opening / closing auxiliary spring 5, which is difficult to work, is adjusted and set at the stage of manufacturing and assembling the ladder at the factory, and the ladder can be shipped.

The folding ladder B has an upper ladder 22 having a fixing leg 21 provided on the bottom surface for fixing the lid 2 to the fixing bracket 10, and an upper ladder 22 abutting against a lower end surface of the upper ladder 22 and facing upward. An intermediate ladder 24 connected by an upper folding hinge 23 to be folded,
And a lower ladder 26 connected to a lower folding hinge 25 which abuts on a lower end surface of the intermediate ladder 24 and bends downward. The fixed leg 21 is fixed to a fixing bracket of the bottom cover 2.

An angle adjusting mechanism 12 is provided on the bending link 8 pivotally connecting the frame-side pivot link 6 and the lid-side pivot link 7.

As shown in FIG. 3, the angle adjusting mechanism 12 is welded to the lower end of the frame-side pivot link 6, and a pin hole 14 for inserting the insertion pin 13 on a predetermined radius line in the side plate.
And the number of four teeth with different radii on the periphery, which are pivotally attached to a support shaft 17 at a position different from the two link pivot shafts 16 on an arm bracket 15 having a window hole 38 for visually recognizing a setting display character 39 described below. The angle adjusting plate 30 provided with the number of the locking teeth 18, one connecting tooth 19, the number of setting pin holes 20 corresponding to the number of each tooth, and the same number of setting display characters 39 on the concentric circle having the predetermined radius.
And one concave portion 31 with which one of the locking teeth 18 meshes is provided in the lid-side pivot link 7.

Next, the adjustment of the angle will be described with reference to FIG.
As shown in a, b, c, d, and e of the angle adjustment explanatory diagram,
Depending on the height of the ceiling with respect to the floor, one of the locking teeth 18 meshing with the concave portion 31 or the joining tooth 19 is joined to the end face of the lid-side pivotal link 7 so that the opening inclination of the lid 2 with respect to the floor surface is increased. Angles θ1, θ2, θ3, θ4, θ5 can be adjusted and fixed in five steps.

For example, since the ceiling height can be calculated based on the straight length and the inclination angle of the ladder, the straight length and the adjustment angle range of the ladder are determined in advance based on the assumed difference in the ceiling height. The ladder can be straightened because it can be made
mm, 2500 ~ 2460mm for a, b
If the height of the ceiling is 2460 to 2420 mm, the height of c is 2420 to 2380 mm, the height of d is 2380 to 2340 mm, the height of e is 2340 to 2300 mm, and the correction adjustment is necessary, The position where the upper ladder 22 is fixed to the lid 2 is adjusted.

[0018]

According to the present invention constructed and operated as described above,
According to the foldable ceiling storage ladder, part of the limited link mechanism is provided with angle adjustment means for changing and setting the inclination angle of the lid, so the inclination angle of the lid is set according to the ceiling height them if, without cutting the tip portion of the bottom ladder can connecting portion is bridged with straight state between the ceiling and the floor without being refracted on the lower concave state, folding type of folding A folding ceiling storage ladder that can be safely moved up and down without the need for troublesome and unreliable work such as cutting at the site while being a ceiling storage ladder can be provided.

[Brief description of the drawings]

FIG. 1 shows a foldable ceiling storage ladder according to the present invention in a storage frame 1;
FIG. 4 is a schematic side view showing a ladder support A in an opened state by connecting the ladder support A and a folding ladder B in a folded state.

FIG. 2 shows a foldable ceiling storage ladder according to the present invention in a storage frame 1;
FIG. 2 is a schematic front view showing a ladder support A in an open state by connecting the ladder support A and a folding ladder B in a folded state.

FIG. 3 is an enlarged side view of a disassembled state of an angle adjusting portion.

FIG. 4 is an explanatory diagram of angle adjustment.

[Explanation of symbols]

 Reference Signs List A Ladder support B Folding ladder θ Inclination angle 1 Storage frame 2 Lid 3 Main hinge 4 Supporting bracket 5 Opening and closing auxiliary spring 6 Frame side pivot link 7 Lid side link 8 Refraction link 9 Adjustment slit 10 Fixture 11 Locking device 12 Angle adjusting mechanism 13 Insertion pin 14 Pin hole 15 Arm bracket 16 Link pivot shaft 17 Support shaft 18 Locking tooth 19 Joining tooth 20 Setting pin hole 21 Fixed leg 22 Upper ladder 23 Upper hinge 24 Middle ladder 25 Lower hinge 26 Lower ladder 30 Angle adjustment plate 31 Recess 35 Turnbuckle 36 Reverse L-shaped groove 37 Adjustment hole 38 Window hole 39 Setting display characters

Claims (1)

(57) [Claims] 1. One end of a storage frame 1 fixed to a ceiling opening
And one end of the lid 2 is rotatably supported on the
The other end of the body 2 and the storage frame 1Lid 2ofOpen tilt angle
Angle adjustment means by link connection for changing and setting
Is provided, and the lower ladder 26 is joined to the upper surface of the lid 2 by folding downward.
Of the intermediate ladder 24 that has been connected to the upper ladder 22 in an upward fold
The upper ladder 22 of the tatami ladder B is supported and fixed, and the free end of the lid 2 is
A lock device 11 is provided at the center of the section, and the folding ladder B is stored in a storage frame.
Foldable to lock and close lid 2 while housed in 1Heaven
On the well storage ladder,A folding ladder B is formed along the inclination direction of the opened lid 2.
The fixed position of the upper ladder 22 is fixed to the upper surface of the lid 2.
Utilizing the adjustment slit 9 of the fixture 10
Inclination direction adjustment means that can be adjusted within the range of length
And step-by-step change of link length by the link connection
Angle adjusting means, The angle adjusting means by the stepwise change is fixed to the lid 2
To adjust and set the tensile strength of the support bracket 4
Of the lid-side pivot link 7 having a plurality of adjustment holes 37
Of the plurality of adjusting holes 37 of the lid side pivot link 7
Open the crawler and the storage frame 1 with the turnbuckle 35
You can adjust the tensile strength connected by the closing auxiliary spring 5
While providing a tensile strength adjusting means, A free end of the lid side pivot link 7 and a handrail
Arm bracket welded to the lower end of the frame side pivot link 6
15 and a pivot connection shaft 16 for pivotal connection.
The arm bracket 15 has around the hole through which the support shaft 17 passes.
Pin hole 1 for inserting insertion pin 13 on a predetermined radius line
4 and a window hole 38 for visually recognizing the following setting display characters 39
The arm bracket 15 has four radii having different radii on its periphery.
One tooth number of locking teeth 18 and one connecting tooth 19 and the number of each tooth
Corresponding number of setting pin holes 20 and the same number of setting display characters
39 is an angle adjusting plate 30 provided on a concentric circle having the predetermined radius.
Is pivoted on a support shaft 17, and the above-mentioned
One recess 31 with which any of the pawls 18 meshes is provided.
The angle changing hand to be engaged with any one of the locking teeth 18.
As a configuration having a step, It is provided with the inclination direction adjusting means and the tensile strength adjusting means.
However, angle adjustment means by stepwise changing the link length
And a collapsible type. ceiling
Storage ladder.