JPH0355626B2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Field of Industrial Application The present invention relates to a method for assembling tread support girders (hereinafter referred to as support girder elements) for stairs that are unitized for each step based on a design drawing, and in particular, to , relates to a method with excellent workability and accuracy during assembly.

(2) Prior Art Conventionally, as shown in FIG. 1, as a staircase whose shape etc. can be arbitrarily set, there are first steps protruding downward from the center of one end and the center of the other end of the tread holder 1. A cylindrical body 2 and a second cylindrical body 3 protruding upward and having an outer diameter slightly smaller than the inner diameter of the first cylindrical body are vertically disposed, and the second cylindrical body 3 of the support girder element consisting of the above is 2
As shown in the figure, it is fitted into the first cylindrical body 2 of the upper element, and a suitable fixing means is used, for example, the cylindrical body 3 as shown in the figure.
It is fixed with a fixing means 8 consisting of two built-in wedges 5, 5, a bolt 6 that brings the two wedges relatively close to each other, and a ball 7 that is pressed by the wedges and comes into pressure contact with the inner surface of the first cylindrical body, German Patent No. 2129755 describes a technology for constructing a series of support girders by sequentially repeating this process.
It has been proposed by et al.

(3) Problems to be solved by the invention When assembling such support girder elements, the height h between the support surfaces of each element (Fig. 2),
Since the first and second cylinders slide relative to each other, the so-called riser height can be easily made to match the value obtained by dividing the floor height by the number of installed steps. However, according to the conventional method, adjusting the connection angle in the left-right direction of adjacent elements in a spiral staircase or a staircase having a curved part in the middle is very difficult and tends to cause errors.

That is, conventionally, a desired staircase is represented in a reduced plan view to determine the displacement angle of the center line of adjacent elements, and each element has a reference scale on one of the first and second cylinders and an angle scale on the other. The main method is to match the scales to match the connection angles of adjacent elements to the determined displacement angles.

However, the above method has the disadvantage that scale verification becomes impossible if the end faces of the first and second cylindrical bodies with scales are separated due to fluctuations in the riser height (the second cylindrical body is inserted shallowly). be. In addition, even when verification is possible, the work is done visually, which is not very efficient and lacks reliability.As the number of connected elements increases, errors gradually accumulate, and the staircase may not be finished as designed. It is often necessary to redo the work midway through.

(4) Means for Solving the Problems The present invention has been made in view of the above, and it is necessary to provide at least the length between the first and second cylindrical bodies of the support girder element on the floor below where the stairs are constructed. The center line of the element, which has one unit length, is expressed in actual size, and the connection point of this line and the center of the connection point of the element to be actually assembled are aligned by swinging down from the axis of the first or second cylindrical body. This method is characterized by connecting each element, and according to this method, accurate assembly can be performed because there is no misalignment of connection points, and even non-skilled workers can construct stairs with good work efficiency. Furthermore, since there is no need to provide scales to the first and second cylindrical bodies, the production of the elements is also improved.

Hereinafter, the method of the present invention will be explained in detail with reference to the attached FIGS. 3 and 4.

First, the riser height of each step and the shape of the stairs are determined, for example, using a computer, in light of conditions such as the installation space of the stairs, the starting point of the installation, the construction floor height, and the number of steps to install treads. Create a floor plan of the staircase as a whole.

Next, the element center line 10, whose length P between the first and second cylindrical bodies of each support girder element shown in the figure is one unit length, is adjusted to the actual size and drawn directly on the installation floor below, or Draw it on the paper and place the drawing paper on the floor. The shape 11 of the treadle may be added to the plan view at that time, if necessary.

After this, the element 4 is actually assembled, and the work can be divided into two ways: assembling the element 4 from top to bottom and assembling it from bottom to top. Fig. 3 shows a method of assembling from top to bottom. Start by fixing the element with the fixing base 9 attached instead of the cylinder, and then the elements 4a, 4b, 4c...
Connect 4n in order. At this time, the present invention
The center of the connecting part between the deck element 4' and the next element 4a is aligned with the connecting point _O1 of the element center line on the floor using the swing 12, and further,
Similarly, the center of the connection between elements 4a and 4b is aligned with the connection point O ₂ on the floor, and the centers of the connection between the elements that will be connected sequentially thereafter are aligned with the connection point O ₃ , O ₄ . . . On on the floor, in that order. The feature is that the required number of elements can be connected while

That is, in the present invention, the second cylindrical body 3 of the element that is currently being connected, for example, the element 4c.
is inserted into the first cylindrical body 2 of the element 4b, the riser height h is set using a setting tool 13 as shown, and at the same time the element 4c is temporarily held horizontally by the tool 13. 1. From the center of the cylindrical body 2, hang a swing 12 with a conical weight 12b attached to the tip of a thread 12a, and swing one end of the connected element to the right or left to swing the weight 12.
When the apex of b coincides with the connection point _O4 of the element center line, the element 4c is attached to the first cylindrical body of the element 4b, which has already been fixed by the above-mentioned fixing means 8 or other fixing means such as a stop bolt. The second cylindrical body of the staircase is fixed, so there is no deviation in the connection angle between the element to be actually constructed and the element above it, and no matter what shape the staircase is, it will be as per the design drawing. It can be constructed.

In addition, in order to make the swing down 12 hang from the axis of the first cylindrical body, prepare a lid 14 with a flange that fits exactly on the cylinder 2, and insert the swing down thread 12 in the center of the bottom surface of the lid 14.
Just add a.

Furthermore, when assembling elements from top to bottom, there may be cases where it becomes impossible to insert the second cylinder of the lowest element 4n into the first cylinder of the upper element; This problem can be solved by making the second cylindrical body 3 of the lowest element detachable from the tread plate holder, and attaching it to the tread plate holder through the upper opening of the first cylindrical body of the upper element.

Furthermore, one end of the lowest element 4n is
The above second base 15a is fixed to the floor below.
It is preferable to support it with a support 15 to which a cylindrical body 15b similar to the cylindrical body is attached.

On the other hand, when assembling element 4 from below,
As shown in the figure, first, the cylinder 15 is placed at the installation starting point _O1 .
b' is fixed, and the first cylindrical body 2 of the element 4a is fixed to this.
be fitted externally. Next, swing down the center of the second cylindrical body 3 of the element 4a to the connecting point of the center line.
O ₂ and fix the cylindrical body 15b' and the first cylindrical body 2. Hereinafter, elements 4b and 4 are similarly
c, 4d, 4e... When assembling while aligning the connection centers of the deck elements with the connection points O ₂ , O ₃ , O ₄ , O ₅ ...O _o on the floor in order, the method of the first embodiment is achieved. Correct support girders can be obtained as well.
However, with this method, it is necessary to temporarily remove the built-in parts of the second cylindrical body and suspend the swing 12, and also,
Maintaining the levelness of the element is also difficult,
Therefore, it is desirable to use the method of the first embodiment as much as possible.

(5) Effects As described above, according to the method of the present invention, the connection point of the element center line represented in actual size on the downstairs floor and the connection point center of the element to be actually assembled can be set to the first or second cylindrical body. As the elements are assembled one by one by swinging them down from the axis of the
Even non-skilled workers can assemble accurate support girders with good workability. Further, since there is no need to attach an angle scale or the like to the element, the productivity of the element itself can be improved, and it is also advantageous in terms of cost.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a step support unit adopted in the present invention, FIG. 2 is a sectional view of its connected state, and FIGS. 3 and 4 are perspective views showing the unit assembly method of the present invention. It is. DESCRIPTION OF SYMBOLS 1... Step board receiver, 2... First cylindrical body, 3... Second cylindrical body, 4... Support girder element, 4'... Deck element, 8... Fixing means, 10... Element center line,
12... Swing down, 13... Set tool, 15... Support tool.

Claims (1)

[Claims] 1. A first cylindrical body protruding downward and a second cylindrical body protruding upward are vertically disposed at the center of the other part and the center of the other end of the treadle support, and the supporting girder element consisting of the above is arranged vertically. multiple, each with the first element of the upper row
In a staircase that forms a series of support girders by fitting and fixing the second cylindrical body of the lower element to the cylindrical body, on the floor below where the stairs are constructed,
At least the center line of the element whose length is one unit length between the first and second cylindrical bodies is represented in actual size, and the connection point of this line and the center of the connection point of the element to be actually assembled are set at the first or second cylinder. A method for assembling support girder elements for stairs, characterized by connecting each element while aligning the elements by swinging them suspended from the axis of two cylinders.