JPS6215699B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a stair tread unit, more specifically, a stair tread unit, in which step height and horizontal connection angle can be freely adjusted, and a plurality of tread units are interconnected to form a composite central support girder type staircase. The present invention relates to a tread unit having the above-mentioned structure.

Among the prefabricated stairs that have already been proposed, a series of stairs is completed by connecting a plurality of tread supports whose step heights and angles can be adjusted to form a central support girder, and attaching treads to this.

However, while this type of stairs has the advantage that the tread supports themselves can be manufactured at low cost and can be easily assembled even by non-experts,
There is a drawback that the size of the treads cannot be standardized, and this is an obstacle to economical mass production of stairs as a whole. In other words, all treads in a straight section may be the same size, but if the stairs draw an arc or
Alternatively, if the direction changes 90 degrees midway, the dimensions of the treads on the arc will be different from those of other steps, so treads suitable for each step must be prepared separately, which makes it difficult to mass-produce stairs. This is a cause that hinders the development of

Therefore, the present invention has the advantages of being able to freely adjust the step height and connection angle and being easy to assemble, while also making it possible to standardize the size of the treads no matter what shape the stairs are in. This makes it possible to mass-produce the entire staircase economically. The purpose is to provide a footboard unit that can.

According to the invention, this object is achieved by constructing the treadle unit in combination with a support member and a treadle of constant size and specific shape.
To explain this further, in the present invention, the tread unit has the functions of both a support girder and a tread plate, the tread plate has a substantially crescent shape in plan view, and there are connectors on the front and rear of the tread plate that can be fastened to each other. By connecting a plurality of treads, the same tread area is secured by using treads of the same shape from the bottom to the top tier.

That is, the tread unit of the present invention has a substantially crescent-shaped outer frame formed by connecting a front arc plate with a long circumference and a rear arc plate with a short circumference at both ends, which are bent at approximately the same curvature in the thickness direction. a support member consisting of a first connector disposed parallel to the front arc plate near the rear of the front arc plate, a beam connecting each of the front and rear arc plates and the first connector; It consists of a substantially crescent-shaped tread plate fixed to the upper part of the support member with its outer periphery along the frame, and a second connecting device erected on the tread plate along the rear arc plate, and the first connecting device and a second connector having a narrower width (periphery) are both formed by curving in an arc shape with equal curvature in the thickness direction of a plate or plate-like member whose upper and lower sides are parallel to each other, and both of which have a narrower width (periphery). The directional center is placed on the line connecting the centers of curvature of the front and rear arc plates, and the first and second connectors are installed vertically, and the height of the overlapping portions described later is changed to adjust the step height of the stairs. The height dimension is adjustable, and the upper end of the second connector is overlapped with one surface of the first connector of the next step step unit below the beam, and after adjusting the step height and connection angle, the overlapped part is The upper and lower tread units are interconnected by welding or bolting,
This is repeated in sequence to form a series of stairs.

Hereinafter, the present invention will be explained in detail based on the accompanying drawings.

Figures 1 a to e show some examples of stairs implemented according to the present invention, in which A is a tread unit and 10 is a tread, which can be imagined using treads of the same shape. It can be seen that it is possible to form stairs of any shape possible, and that the same area of the tread can be secured for all steps.

Next, the treadle unit of the embodiment is shown in FIGS. 2 to 4.
This will be explained based on the diagram. In addition, in this example, a connection board as a first connection tool that serves as a connection position reference is provided in front of the support member, and an apron as a second connection tool is provided in the rear, but the positional relationship between the board and apron is may be the opposite.

Now, as you can clearly see from Figures 2 and 3, the apron standing up on the rear upper surface of the support member is
It consists of two plates 1 and 2 bent into an arc shape and arranged in parallel, and at the upper end of each plate there is a horizontal T extending from one end to the other on the surface facing the connection board, which will be described later.
Box-shaped profile rail 3 with slot 3'
is fixed. These three members 1, 2, and 3 come together to form a stable box-shaped beam, and at the lower end of this beam, there are several supporting members made of square pipes, for example. beam 4 is fixed.

Further, a connection board 5 is fixed to the tip of the beam 4, and the radius of curvature is equal to that of the rear apron, and the width is wider than that of the apron. The parts are aligned and the two are fastened to each other via a fastening means.

The fastening means adopted here is bolt 6.
The head of the bolt 6 is inserted into the profile rail 3 from the side and locked, and the shaft of the bolt extending rearward from the T-slot 3' of the rail 3 is inserted into the board 5 at an appropriate interval. The nut 7 is inserted into the vertically elongated hole 5' provided in the hole 5', and a nut 7 is screwed onto the tip protruding from the hole 5' to tighten and connect the base plate 5 and the apron of the lower unit. In this way, the bolt 6 can be moved in the vertical direction within the range allowed by the elongated hole 5', so that the connection height of the tread unit, that is, the step height of the stairs can be freely adjusted. Also, since the profile rail 3 and the bolt 6 are allowed to move relative to each other in the lateral direction by the T-slot 3', it is possible to move one unit A laterally relative to the other, as shown by the chain line in Figure 4. Therefore, the horizontal displacement and connection angle of the two units can also be freely changed within a range of about 60 degrees. Considering workability, it is desirable to connect the board 5 and the apron using the fastening means shown in the figure, but they can also be fixed by welding (in this case, the profile rail 3 may be omitted). In this case, the connection height and connection angle can be freely adjusted within the specified range.

Note that the rail 3 does not necessarily need to be fixed to the apron, and the positional relationship between the rail and the board 5 may be reversed. Furthermore, the rail 3 may be made of an ordinary single plate as long as it has sufficient strength.

Furthermore, if the rail is installed behind the tread,
A plurality of these rails may be arranged vertically along the edge of the tread at regular pitches, and bolt holes may be provided in the connection board at the front of the tread at pitches corresponding to the grooves in the rail. Although the connection height cannot be adjusted steplessly in the horizontal direction, it can be made stepless by making the bolt hole a horizontal long hole. Furthermore, when the rail is formed from a single plate, the grooves may be discontinuous.

Next, a reinforcing plate 8 is fixed to the upper front surface of the connection board 5 as an extension of the beam 4, and an outer frame 9 that covers the outer periphery is attached to the tip of this plate. The support member is made up of the above-mentioned beam 4, connection board 5, reinforcing plate 8, and outer frame 9, and has a lightweight box-shaped structure, but its planar shape is such that the board 5 and the apron that runs along it have the same radius. Therefore, it has a substantially crescent shape as shown in FIG. 4, and the footboard 10 fixedly supported on the top thereof also has a similar shape. Here, the treadboard 10 is provided with a large number of holes in order to reduce its weight, but these holes may be omitted, and the treadboard is made up of a number of lines of a certain length connected at a certain intersection angle to form an arc. The shape may be such that close edges are formed.

Further, the treadle 10 may be used as is with the surface heights of the outer frame 9 aligned, or, on the other hand, as shown in the figure, the frame 9 may be protruded above the surface of the treadle 10 and placed on the surface surrounded by the frame. The appearance is improved by installing a floor covering 11 of carpet, plastic, wood, ceramic, etc.

It is desirable that the frame 9 is also covered with a decorative cover 12 made of plastic or the like, and if the lower opening of the support member is also covered with a cover after the upper and lower units are fastened, the staircase will be finished more aesthetically.

Furthermore, as shown in FIGS. 4 and 5, a support pipe 13 that fits and holds the support legs B of the handrail provided with either male or female fixing parts on both sides of the support member.
If it is provided vertically, there is no need to weld or screw the supporting legs as in the past.

Note that such a stepboard unit may be manufactured by assembling each member by welding, but from the standpoint of mass production, it is also desirable to manufacture it by casting, pressure casting, or press molding.

In addition, in the embodiment, both the apron and the support member were made hollow in order to save material and reduce weight, but it goes without saying that they may be filled in at locations that do not interfere with the connection. stomach.

The tread unit of the present invention is as described above, and when a plurality of tread units are connected to each other to form a series of stairs, the step height and horizontal connection angle can be freely adjusted, so that the ascent angle (inclination angle) can be adjusted. Moreover, since the finished staircase has treads of the same shape as one integral component, there is no need to install treads later, thus allowing for economical mass production of the entire staircase. Become.

In addition, in a plan view as shown in FIG. 1, the deviation angle of the centers of mutually connected units is determined,
If you connect the actual items according to this angle, you will get a staircase with the desired shape, so even an unskilled person can easily construct the stairs. This simplifies the construction work and further improves the efficiency of stair construction.

The footboard unit of the present invention can be used outdoors and is also suitable for plating.

[Brief explanation of the drawing]

1A to 1E are plan views showing examples of stairs that can be implemented, FIG. 2 is a partially cutaway perspective view showing an embodiment of the tread unit of the present invention, and FIG. 3 is a connection state of the same as above. 4 is a sectional view of the unit viewed from above, and FIG. 5 is a partially cutaway side view. A...Treadboard unit, 1, 2...Plate, 3...Profile rail, 4...Beam, 5...Connection board, 6
... Bolt, 7 ... Nut, 8 ... Reinforcement plate, 9 ... Outer frame, 10 ... Step board, 11 ...
...floor covering, 12...decorative cover.

Claims (1)

[Scope of Claims] 1. A substantially crescent-shaped outer frame formed by connecting a front arc plate with a long circumference and a rear arc plate with a short circumference at both ends, which are bent at approximately the same curvature in the thickness direction; A support member consisting of a first connecting device arranged in parallel along the front arc plate near the rear of the plate, a beam connecting each of the front and rear arc plates and the first connecting device, and an outer frame. It consists of a substantially crescent-shaped tread plate fixed to the upper part of the support member with its outer circumferential edge aligned, and a second connecting tool erected on the tread plate along the rear arc plate, the first connecting tool and this. The second connector, which has a narrower width (periphery), is formed by curving a plate or a plate-like member whose upper and lower sides are parallel to each other into an arc shape with the same curvature in the thickness direction, and both of which have a narrower width (periphery). It is installed vertically with its center on the line connecting the centers of curvature of the front and rear arc plates, and the first
The height of the second connecting device is such that the step height of the stairs can be adjusted by changing the stacking height of the overlapped portions described later, and the upper end of the second connecting device is connected to the tread unit of the next step below the beam. After adjusting the step height and connection angle, the upper and lower tread units are interconnected by welding or bolting the overlapped part, and this is repeated sequentially to form a series of steps. A stair tread unit designed to 2. The second connecting device has a horizontal profile rail from one end to the other with a transverse T-slot in the upper end for locking the head of the fastening bolt; The stair tread unit according to claim 1, characterized in that it has a plurality of vertically elongated bolt holes spaced apart in the width direction to overlap the opening of the T-slot when connected to a connecting tool. 3. The staircase according to claim 1 or 2, characterized in that the support member has support pipes on both sides for fitting support legs of a handrail that pass through the tread and stand up vertically. tread unit. 4. Claims 1 to 3, characterized in that the upper surface of the step board is covered by a floor covering person.
The stair tread unit described in any of the paragraphs. 5. The stair tread unit according to any one of claims 1 to 4, wherein the outer frame is covered with a decorative cover.