JPH0354258Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to an assembly type stair rise adjustment device.

Conventional technology The steps, treads, etc. that make up the stairs are manufactured in advance at a factory and then assembled on-site, which has the advantage of reducing the number of man-hours required for on-site construction and making the work easier. The creator of this type of prefabricated staircase devised a new prefabricated staircase in which L-shaped rib members were attached to the girders and the ends of each rib member were connected with bolts, and he filed a patent application in 1983. - Filed as No. 197095.

Problems to be solved by the invention The above-mentioned invention of Japanese Patent Application No. 59-197095 has the advantage of being able to obtain a high-strength structure because the individual rib members are connected with each other with bolts. For prefabricated stairs, in order to have versatility for each building, it is necessary to be able to adjust the rise height according to the floor height of the building, and this allows for common parts. However, the above-mentioned idea still has the problem that such adjustment of the raising height cannot be performed.

Means for Solving the Problem This invention makes it possible to adjust the height of the rise as described above, by passing the girder 1 across the upper and lower floors, and connecting the vertical piece 10 and the horizontal piece. 9 are connected in an L-shape, and are attached to the beam member 1 at the connecting portion 8 with bolts 12, so that the plurality of rib members 7 are arranged in parallel in the longitudinal direction of the beam member 1, and are connected to each other. Vertical piece 10 of each adjacent rib member 7
The tip and the tip of the horizontal piece 9 are connected by a bolt 17 through a vertical elongated hole 15 formed in at least one of both tips, and each horizontal piece 19 supports a step plate 20. It is.

Effect: The height between the horizontal pieces 9 of each ribbed member 7, that is, the raised height, can be freely changed within the range of the elongated hole 15. In this case, the load acting on the horizontal piece 9 when going up and down is converted into a direction in which the horizontal piece 9 rotates around the bolt 12 that attaches the rib member 7 to the girder 1 as a fulcrum. There is no risk of this falling.

Embodiment In FIG. 1, reference numeral 1 denotes a beam member according to the present invention, which has a structure in which a pair of beam members 2, 2 on the left and right sides are arranged in parallel. As shown in FIG. 1, each girder member 2 is formed into a so-called angled cross-sectional shape bent at a substantially right angle, and has a vertical portion 3.
a is oriented vertically upward, and the horizontal portion 3b is oriented horizontally from the lower end portion of the vertical portion 3a. Both girder members 2, 2 are arranged so that the vertical portions 3a, 3a face each other. That is, the girder material 1 formed in this way
are arranged in a roughly inverted T-shape with the horizontal portions 3b, 3b of both girder members 2, 2 as the bases. Bolt holes 4, 4 are provided in communication with each other between the opposing vertical portions 3a, 3a, respectively, and these bolt holes 4, 4 extend in the longitudinal direction of the girder members 2, 2. They are placed at intervals.

As shown in FIG. 2, the girder 1 is passed in an inclined manner between the upper and lower floors, and its upper end is connected to the beam 5 on the upper floor via a connecting bracket 6. At the same time, the lower end side is also connected via a connecting bracket 6 to the beam member 5 in the downstairs section.

On the other hand, 7 is a hanging member attached to the beam member 1. This ribbed member 7 has a horizontal piece 9 and a vertical piece 10 connected in an L-shape via a connecting part 8, and a bolt hole 11 is formed in the connecting part 8. Then, the continuous portion 8 is inserted between the pair of girder members 2, 2 of the girder member 1, and the fastening bolt 12 is inserted from the side of one vertical portion 3a as shown in FIG. It is inserted into the holes 4, 11, 4 and fastened by screwing the nut 13 from the other vertical portion 3a side. At that time, the horizontal piece 9 is arranged so as to protrude substantially horizontally forward from the continuous portion 8, and
The vertical piece 10 is arranged so as to protrude substantially vertically upward. On one side wall portion of the upper end of this vertical piece 10,
A connecting piece 14 projecting upward is attached, and a vertical bolt insertion elongated hole 15 is drilled in the left-right direction. As shown in FIG. 3, the connecting bolt 17, which is passed through the bolt hole 16 drilled near the tip of the horizontal piece 9 of the adjacent ribbed member 7, is inserted into this elongated hole 15. A nut 18 is tightened on the tip side of 17 to connect the adjacent rib members 7, 7 together. At that time, the height between each horizontal piece 9 is adjusted by moving the connecting bolt 17 up and down within the range of the elongated hole 15.

Note that after bending the upper end portion of the horizontal piece 10 laterally, it is further bent upward to form the connecting piece 1.
4 may be integrally formed.

By sequentially repeating such operations, a plurality of rib members 7, 7... are connected to the girder 1 in a stair-like manner from the lower floor to the upper floor, as shown in FIG. It turns out. That is,
Depending on the number of steps of the stairs, a plurality of hanging members 7, 7...
By connecting the generally called stringer 1
9 is constructed. Typically, such stringers 19 will also be provided on the other side of the staircase.

Next, the stringer 1 configured as above
The structure for attaching the step plate 20 to the step plate 9 will be explained.

A stepped board fixing bolt 21 that projects upward is integrally attached to the front end of the horizontal piece 9 of the ribbed member 7, and another stepped board that similarly projects upward is attached to the side surface on the base end side. Fixing bolt 2
2 is provided.

On the other hand, a non-slip mounting groove 23 is formed on the upper surface of the front edge of the stepped plate 20 along the front edge. A stepped concave hole 25 into which a fixing nut 24 paired with the step plate fixing bolt 21 is inserted is opened in the non-slip mounting groove 23. Further, on the lower surface of the stepped plate 20, a groove 26 for attaching a riser plate is provided in parallel to the front edge. A similar riser plate mounting groove 27 is
A fixing nut is also formed on the upper surface of the rear edge of the step plate 20, and also in the riser mounting groove 27, which pairs with the step plate fixing bolt 22 on the base end side of the step plate receiver 9. A stepped recess 29 into which the holder 28 is inserted is formed.

Note that the upper part of the front edge of the step board 20 is rounded in consideration of safety when going up and down.

Then, the stepped plate 20 having the above structure is attached to the stringer 19 in the following manner.

First, the step plate 20 is placed on the horizontal piece 9 of the ribbed member 7 attached to the beam member 1, and both step plate fixing bolts 21 and 22 are projected into the stepped recessed holes 25 and 29, respectively. , fixing nut 2 from above
4 and 28 to fix it.

In parallel with this work, a riser plate is installed between the riser plate attachment groove 27 on the upper surface of the rear edge of the lower tier plate 20 and the riser plate attachment groove 26 on the lower surface of the front edge of the tier plate 20. 31 and fix it.

Next, the non-slip 32 is installed in the non-slip mounting groove 23, and the threaded end of the stepped board fixing bolt 21 exposed in the stepped concave hole 25 in the non-slip mounting groove 23 and the fixing nut 24 are attached. cover up.

Repeating such work, the step plates 20, 20...
...and risers 31, 31... are assembled one after another.

In the above, the connecting bolt 17 that connects the horizontal piece 9 and the vertical piece 10 can move up and down within the range of the elongated hole 15, and there is a risk that the horizontal piece 9 will fall downward due to the load when going up and down the stairs. It seems as if. However, the horizontal piece 9 is rotated along the arc of radius r ₁ in FIG. is converted into a force that presses the connecting bolt 17 against the peripheral wall surface of the elongated hole 15, and on the other hand, the load acting on the vertical piece 10 that is integrated with the horizontal piece 9 is also as shown in FIG.
Upper connecting bolt 17 along an arc of radius r ₂
There is no need to worry about this because the force is converted into a force that moves horizontally.

Effects of the invention According to this invention, since the horizontal piece and the vertical piece of each rib member supporting the step board are connected to each other, a highly strong prefabricated staircase can be obtained. In this case, since the bolts that connect these parallel members are supported through elongated holes in the vertical direction,
The raised height can be adjusted according to the floor height of the building, and one type of hanging member can be used in various buildings with different floor heights, making it possible to standardize parts. In addition, even when such vertical elongated holes are used for connection, there is no risk that the horizontal pieces supporting the step plates will descend for the reasons described above.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of this invention, Fig. 2 is a side view showing an assembled state, Fig. 3 is an enlarged vertical sectional view of the main parts, and Fig. 4 is a connection of the rib members. It is a schematic side view which shows a state. 1...Girder material, 7...Sasara member, 8...Connection part, 9...Horizontal piece, 10...Vertical piece, 12, 17
... Bolt, 15 ... Long hole, 20 ... Step plate.

Claims (1)

[Scope of utility model registration request] The girder material is passed across the upper floor side and the lower floor side, and a stringer member in which a vertical piece and a horizontal piece are connected in an L shape is attached to the girder material at the connecting part with bolts to form a plurality of stringers. The members are arranged in parallel in the longitudinal direction of the girder, and the vertical one end and the horizontal one end of each adjacent rib member are connected by bolts through a vertical elongated hole formed in at least one of both ends. , an assembly type stair rise adjustment device characterized in that each horizontal piece supports a step plate.