JPH0921218A - Folding staircase equipped with frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding staircase for general purpose usage with a frame which is equipped with the frame between the upper and lower staircases and capable of being installed in the free direction of the frame. SOLUTION: Folding staircases 1, 2 are installed longitudinally with a frame 3 interposed, and they are provided with parallelogram links and are pivotingly attached with plural stepping slabs, and the frame 3 possesses plural standing-up supports 5, 5... and is provided with a seat 7 at the middle place. The upper end brackets of the lower side folding type staircase 1 are fixed at the supports 5, 5, and at the same time the lower end part of the upper side folding staircase 2 is mounted on a receiver 6 provided at the supports 5, 5 and held, and its upper end brackets are fixed at a high place 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a staircase for climbing to a high place, and a foldable staircase having a mount in the middle.

[0002]

2. Description of the Related Art Stairs are generally used for climbing to high places and second floors in buildings. Depending on the height, this staircase may have a pedestal in the middle. That is, if the inclination angle for hanging the stairs is steep, there is no problem in strength of the stairs, but if a gentle inclination angle is set to facilitate climbing, the bending moment acting on the stairs will increase. For that reason, the pedestal placed in the middle separates the two short stairs to reduce the bending moment that acts.

The above-mentioned mount is not only installed to supplement the strength of the stairs, but the hanging direction of the lower stairs and the upper stairs can be changed by sandwiching the mounts. Therefore, there is also an advantage that the stairs can be installed in a place that does not interfere. However, such an intermediate pedestal depends on the height of a high place and the type of stairs to be used, and is constructed in combination with the stairs. That is, the structure is not versatile and can be used at any place.

[0004]

When the pedestal is installed in the middle of the stairs used as a means for ascending to a high place, there are the above problems. The problem to be solved by the present invention is this problem, and provides a folding staircase with a gantry that can be easily installed regardless of the height of a high place.

[0005]

The present invention is a ladder for climbing to a high place or a second floor by using a folding staircase. In this case, the staircase is not a single ladder but a pedestal is installed between them to fold the staircase. Tatami stairs will be connected vertically. The folding stairs to be installed on the upper and lower sides can be connected in a straight line with the above pedestal in between.
In the case of connecting to a mold, there may be a case in which two pedestals are additionally provided and connected to a U-shape. However, the present invention does not limit the connection form of the folding stairs.

Here, the foldable staircase is of a type that can be folded and housed, and the front tilted pillar and the rear tilted pillar, which are arranged in parallel with each other at a distance, are connected to each other by an upper connecting rod and a rod. The structure is such that the lower connecting rod is pivotally mounted, and tread plates arranged parallel to the upper and lower connecting rods at predetermined intervals are pivotally mounted. A mechanism that can adjust the inclination angle of the stairs is provided inside the upper connecting rod of the stairs, the slope of the stairs can be freely changed, and at the position where the predetermined slope is reached,
It has a structure that can fix the angle. Of course,
In some cases, the tilt angle adjusting mechanism is not provided.

The folding stairs installed below the pedestal have their lower ends placed on the floor and their upper ends fixed to the pedestal. In the folding staircase of the present invention, the treads are always kept horizontal regardless of the position fixed to the pedestal. The pedestal is a framed frame, and a pedestal is attached between the treads of the connecting stairs. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0008]

FIG. 1 is an embodiment showing a folding staircase with a gantry according to the present invention. In the figure, reference numerals 1 and 2 denote folding stairs, and 3 denotes a pedestal.
2 are connected. A high place 4 is provided at the upper end of the folding stairs 2, so that it is possible to go up from the folding stairs 1, pass through the pedestal 3, and then go up from the folding stairs 2 to the high place 4.

The upper end of the lower folding staircase 1 is fixed to the columns 5 and 5 of the pedestal 3, and the lower end rests on the floor. The upper end of the folding staircase 2 on the upper side is fixed to a high place 4, and the lower end is mounted on and fixed to receivers 6 and 6 protruding laterally from the columns 5 and 5 of the pedestal 3. And the gantry 3 has four columns 5, 5, ...
Is a frame body that is vertically erected, is framed at the lower end, and has a pedestal 7 attached at the middle. A handrail 8 is attached to the folding staircase 2, and the handrail 8 is fixed to the upper end of the pedestal 3 and the pillar 9 standing upright in the high place 4.

FIG. 2 shows a folding staircase having an angle adjusting mechanism according to the present invention. The staircase comprises a pair of front slanted columns 11.
And a pair of rear slanted columns 12, each front slanted column 11 and rear slanted column 12 are connected by an upper connecting rod 13 and a lower connecting rod 14 formed in an L shape, and a plurality of treads 15, 15 are provided between them. Are arranged in parallel with the upper and lower connecting rods 13 and 14, and the side surface of the tread plate 15 has the front tilt column 11
, And the rear slanted column 12 are supported by support shafts 16, 16 ... Therefore, the pillar and the tread can freely move in a pantograph manner.

FIG. 3 shows a state in which the folding staircase having the angle adjusting mechanism of the present invention is folded. Since the staircase according to the present invention can be freely moved in a pantograph manner, it is not used. It can be folded as shown in FIG. 3, the front slanted column 11 and the rear slanted column 12 contact each other, and the treads 15, 15, ... Are arranged in one plane.

More specifically, the L-shaped upper connecting rod 13 is provided with support shafts 16 and 1 at the ends of the longitudinal direction and the front slanting column 11, and the lateral direction and the rear slanting column 12, respectively.
Shaft 6 Then, the lateral direction of the lower connecting rod 14 which is formed into an L shape in opposition to the upper connecting rod 13 and the end portions of the front inclined column 11 and the longitudinal direction and the rear inclined column 12 are respectively supported by the support shafts 16 and 16. Axle. Further, the side surfaces of the treads 15, 15 ... Arranged between them are also formed in an L shape, and the longitudinal ends and the front slanted columns 11 and the lateral direction and the rear slanted columns 12 are respectively supported by the support shafts 16, 16.
With a shaft. By doing so, when the stairs are folded, the treads 15, 15, ... Can be aligned on the same plane in the longitudinal direction of the front tilted column 11, and the stairs can also be used as an ascending plate.

Next, the angle adjusting mechanism of the present invention will be described with reference to FIGS. First, as shown in FIG. 4, the angle adjusting mechanism 20 is provided in the bracket 17 of the upper connecting rod 13, and the engaging teeth 23 and the engaging teeth 23 are provided at the end of the core 21 that is engaged in the front tilted support 11. Radiator 2 with locking portion 24
2 is rotatably supported by a hollow pin 32. Then, the claw member 25 that engages with the radiator 22 is arranged at the U-shaped bent portion of the core 21, and is pinned by the pin 27. Further, the engaging teeth 23 and the claw members 25 are provided on the engaging protrusions of the claw members 25.
The lever member 26 capable of releasing the engagement of is connected via the pin 28. A spring force of a spring 29 is biased to the pin 28 so that the claw member 25 meshes with the engaging tooth 23.

Further, as a device for finely adjusting the inclination angle of the stairs, the fine adjustment screw 3 provided on the bracket 17 is used.
The locking portion 24 of the radiator 22 is combined with the moving member 30 that engages with the moving member 30, and the spring force is applied to the moving member 30 by the spring 33. Therefore, if the fine adjustment screw 31 is turned, the locking portion 24 moves up and down together with the moving member 30, and the radiator 22 rotates. In this case, since the claw member 25 meshes with the engaging claw 23 of the radiator 22, the tilt angle of the front tilt column 11 is changed together with the claw member 25.

By the way, the spring 33 pushes the spring force up against the moving member 30 and pushes it up.
The fine adjustment screw 31 projects from the upper surface of the upper connecting rod 13.
When the left and right fine adjustment screws 31 and 31 have variations, the protrusion lengths appear differently. Therefore, the fine adjustment screws 31 and 31 can be corrected by aligning the protrusion lengths (FIG. 5). reference). However, the spring 33 may not be provided in the fine adjustment screw 31. When a load is applied to the stairs, a torque that rotates the radiator 22 in the counterclockwise direction acts, and the locking portion 24 descends to move the moving member 3.
0 and the fine adjustment screw 31 are pushed down. However, the moving member 30 is held in a predetermined position by being supported by the head of the fine adjustment screw 31, and the angle of the radiator 22 is appropriately determined.

As described above, when the angle adjusting mechanism is arranged on the stairs, first, the core 21 having the angle adjusting mechanism 20 is inserted into one end of the front tilted column 11, and the step board 15 and the upper connecting rod are connected. 13 is pivotally mounted on support shafts 16 and 16 so as to be swingable. It is preferable to dispose these angle adjusting mechanisms on both the left and right sides of the upper connecting rod 13, but if a large load does not act, the angle of the stairs can be adjusted by disposing only one of them.

Next, a method of adjusting the angle adjusting mechanism 20,
That is, to explain the method of adjusting the gradient of the stairs, the moving member 30 that engages with the fine adjustment screw 31 is fixed at a fixed position, and the locking portion 24 that engages with the moving member 30 naturally causes the movement member 30 to be fixed. The radiator 22 is also fixed. And
For example, the angle is determined by the engagement of the engaging teeth 23 cut in the radiator 22 at an angle of 15 degrees with the claw member 25 arranged in the front tilted column 11. That is,
By shifting one engaging tooth 23, the slope of the stairs is 15
The angle of degrees can be changed.

Further, for fine angle adjustment within 15 degrees, the position of the moving member 30 is changed by rotating the fine adjustment screw 31. Along with that, the radiator 22 also rotates, and the positions of the locking teeth 23 change. As a result, the position of the claw member 25 that meshes with the locking tooth 23 is changed, and the tilt angle of the front tilt column 11 is changed, so that the angle of the stairs, that is, the slope can be freely changed.
Moreover, it can be easily adjusted.

When the load and the pawl member 25 engaged in this manner are applied to the tread plate 15 when the stairs are moved up and down, the meshing is further strengthened, and the teeth and the pawls do not come off. . Further, when folding the stairs as shown in FIG. 3, by pushing the lever member 26, the radiator 22
The claw member 25 is released from the engaging tooth 23 of, and the stairs can be folded at a stretch.

However, the releasing means of the claw member 25 is not limited to the lever member 26, but a screw may be provided at the position of the pin 28 and the head of the screw may be projected to the surface of the front tilted column 11. Therefore, a curved groove that allows the head of the screw to move is formed on the surface of the front inclined support column 1, and the head of the screw is slid to release the pawl member 25 from the locking tooth 23. FIG. 6 is a specific example showing the releasing means in this case.

By the way, since the folding staircase 1 located on the lower side is attached to the pedestal 3, a mounting plate 18 is formed on the front surface of the bracket 17 and screws are attached to the columns 5 and 5 of the pedestal 3. Will be stopped. In this state, the angle adjusting mechanism 20 is adjusted so that the lower connecting rod 14 contacts the floor surface, and at the same time, the treads 15, 15, ... On the other hand, in the folding staircase 2 located on the upper side, similarly, the upper bracket 17 is screwed to the high place 4 and the lower connecting rod 14 is screwed to the receivers 6 and 6 attached to the support column 5.

7 (a) to 7 (c) show a specific form in which the folding stairs 1 and 2 are arranged. (A) is a case where the folding stairs 1 and 2 are arranged in an L shape with the gantry 3 in between.
(B) is a case where both folding stairs 1 and 2 are U-shaped, and (c) has two pedestals 3a and 3b arranged adjacent to each other,
The heights of the mounts 3a and 3b are changed, and the mount 3
In the embodiment, treads 19a and 19b are attached to a and 3b at different heights. Therefore, in this case, it is possible to climb to a higher height 4.

By the way, the folding staircase of the present invention has a structure in which the inclination angle thereof can be freely changed, and therefore can be arranged even if the height at which it is mounted on the gantry 3 is changed. Therefore, the folding stairs 1 and 2 do not have to have the angle adjusting mechanism 20 as shown in FIG. 4, but the bracket 17 provided at the upper end of the folding stairs.
If is fixed to the gantry 3, they are arranged at an inclination angle according to their height. As described above, the folding staircase of the present invention has the pedestal in the middle, and the following effects can be obtained.

[0024]

EFFECTS OF THE INVENTION The folding staircase of the present invention has a pedestal in the middle so that it can rise to a relatively high place. Therefore, the folding staircase may be short and strong in terms of strength. In addition, there are various forms of arranging two folding stairs above and below with the pedestal in between, and the installation space is smaller than when using a long single staircase, and it should be placed in one corner of the room. It is a versatile staircase that can be used.

Since the staircase of the present invention is a foldable type, the stairs are arranged regardless of the height at which they are attached to the pedestal or the height between the high place and the pedestal. You can That is, the inclination angle of each staircase can be freely changed and attached. Furthermore, the column-shaped stand stands up without being fixed to the floor surface, and the double-folding stairs serve as a support to stabilize it.

[Brief description of drawings]

FIG. 1 is an embodiment of a folding staircase equipped with a gantry of the present invention.

FIG. 2 is a perspective view showing a specific example of a folding staircase.

FIG. 3 shows a state in which a folding staircase is folded.

FIG. 4 is an angle adjusting mechanism provided for a folding staircase.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is another means for releasing the pawl member from the engaging teeth.

FIG. 7 is another embodiment of the folding staircase including the gantry of the present invention.

[Explanation of symbols]

 1 Folding stairs 2 Folding stairs 3 Mounting base 4 High places 5 Pillars 6 Supports 7 Pedestals 8 Handrails 9 Pillars 11 Front tilting pillars 12 Rear tilting pillars 13 Upper connecting rods 14 Lower connecting rods 15 Step plates 16 Support shafts 17 Brackets 18 Mounting plate 19 Tread plate 20 Angle adjustment mechanism 21 Core 22 Radius 23 Engaging tooth 24 Locking part 25 Claw member 26 Lever member 27 Pin 28 Pin 29 Spring 30 Moving member 31 Fine adjustment screw 32 Hollow pin 33 Spring

Claims (2)

[Claims] 1. A foldable staircase having a gantry placed between them to connect two stairs so that the stairs can be elevated to a high place, each staircase having two front slanted columns and a rear part. A quadrangular link mechanism consisting of an inclined support rod, an upper connecting rod and a lower connecting rod, and a plurality of treads mounted on a supporting shaft at predetermined intervals. A pedestal is provided in the part, the upper folding bracket is fixed to the pillar for the lower folding stairs, and the upper folding bracket is fixed by mounting the lower end on the receiver provided on the pillar. A foldable staircase with a pedestal characterized by being fixed to a high place. 2. The folding staircase equipped with the gantry according to claim 1, wherein the folding staircase is provided with a tilt angle adjusting mechanism.