JP2021063358A - Fitting structure of covering material to backside of stair unit - Google Patents

Abstract

To provide a fitting structure of covering material to the backside of a stair unit, capable of fitting a covering material to the lower end side of a girder even when there is a protrusion protruding downward from the lower end of the girder on the backside of the stair unit.SOLUTION: A disclosed fitting structure of covering material to stair unit backside is a fitting structure of covering material for fitting a covering material 4 for covering a backside 3 of a stair unit 1 to a girder 2 of the stair unit 1. The covering material 4 is fitted to a lower end side (lower plate 22) of the girder 2 via fitting means 6 so that an upper face 4a of the covering material 4 is positioned below a protrusion 5 protruding downward from a lower end (lower face 2a) of the girder 2 of the stair unit 1.SELECTED DRAWING: Figure 1

Description

The present invention relates to a structure for attaching a covering material to the back side of a staircase unit for attaching a covering material covering the back side of the staircase unit to a girder of the staircase unit.

For example, an outdoor steel staircase unit attached to the outer surface of a building such as a detached house or an apartment house is known (see Patent Document 1).
In the outdoor steel staircase unit, for example, a ceiling covering material is provided as a covering material for covering the back side of the corridor, and the ceiling covering material is attached to a field edge material provided on the lower surface of the joist material.

Japanese Unexamined Patent Publication No. 2013-199811

For example, in the staircase portion of the above-mentioned outdoor steel frame staircase unit, a step portion composed of a plurality of tread plates and a plurality of riser plates is supported by girders called sasara girders or side girders arranged on the left and right sides of the step portion. Therefore, when attaching the covering material to the back side of the staircase portion, it is conceivable to attach the covering material directly to the lower end side of the left and right girders.
In addition, when attaching the covering material to the corridor or the back side of the landing, which is a flat surface other than the stairs of the outdoor steel staircase unit, the lower end side of the girders provided on the left and right sides of the corridor, or the left and right sides of the landing. It is conceivable to attach the covering material directly to the lower end side of the girder provided in.
However, on the back side of the outdoor steel staircase unit, when a brace material such as a turnbuckle or a diagonal member is attached to the lower end side of the left and right girders, the connecting portion between the lower end side of the girder and the brace material is the lower end of the girder. Since it becomes a projecting object that projects downward from the girder, there is a problem that the projecting object becomes an obstacle and the covering material cannot be attached to the lower end side of the girder.

In order to solve the above problems, the present invention is a staircase unit in which a covering material can be attached to the lower end side of the girder even if there is a protrusion protruding downward from the lower end of the girder on the back side of the staircase unit. It provides a covering material mounting structure on the back side.

The covering material mounting structure on the back side of the staircase unit according to the present invention is a covering material mounting structure for mounting the covering material covering the back side of the staircase unit on the girder of the staircase unit, and the upper surface of the covering material is the girder of the staircase unit. Since the covering material is attached to the lower end side of the girder via the attachment means so as to be positioned below the projecting object protruding downward from the lower end, the covering material projects downward from the lower end of the girder. Even if a projecting object is present, the covering material can be easily attached to the lower end side of the girder via the attaching means.
Further, the mounting means includes a projecting object avoiding member formed by a long member long along the elongated direction of the lower end of the girder, and the projecting object avoiding member is connected to the lower end of the girder and avoids the projecting object. Since it is characterized by having an upper connecting portion having an object avoidance portion, a lower connecting portion to which the covering material is connected, and a vertical connecting portion connecting the upper connecting portion and the lower connecting portion, from the lower end of the girder. Since the projecting object avoiding member can be connected to the lower end of the girder while avoiding the projecting object protruding downward, and the covering material can be connected to the lower connecting portion of the projecting object avoiding member, there is a projecting object projecting downward from the lower end of the girder. Even so, the covering material can be easily attached to the lower end side of the girder via the projecting object avoiding member.
Further, since the mounting means is provided with a covering material side mounting member that is mounted on the side portion of the covering material and is connected to the lower connecting portion of the projecting object avoiding member, the mounting means projects downward from the lower end of the girder. Even if a projecting object is present, the covering material can be easily attached to the lower end side of the girder via the projecting object avoiding member, which facilitates the work.
Further, since the projecting portion is a connecting portion between the lower end of the girder and the end portion of the brace material, even if there is a projecting portion that is a connecting portion between the lower end portion of the girder and the end portion of the brace material. , The covering material can be attached to the lower end side of the girder.

An enlarged cross-sectional view (Embodiment 1) showing a structure for attaching a covering material to the back side of a staircase. The cross-sectional view which shows the covering material attachment structure to the back side of the stairs part (the first embodiment). Exploded view of the mounting means in the covering material mounting structure on the back side of the stairs (Embodiment 1). FIG. 6 is a view of the relationship between a projecting object and a projecting object avoiding portion formed on a projecting object avoiding member in order to avoid the projecting object as viewed from below (Embodiment 1). FIG. 3 is a perspective view showing a relationship between a projecting object and a projecting object avoiding portion formed on the projecting object avoiding member in order to avoid the projecting object (Embodiment 1). FIG. 6 is a process diagram (Embodiment 1) showing a procedure of a method of attaching a covering material to the back side of a staircase. FIG. 6 is a process diagram (Embodiment 1) showing a procedure of a method of attaching a covering material to the back side of a staircase. FIG. 6 is a process diagram (Embodiment 1) showing a procedure of a method of attaching a covering material to the back side of a staircase.

Embodiment 1
As shown in FIG. 1, the covering material mounting structure on the back side of the staircase unit according to the first embodiment is a covering for mounting the covering material 4 covering the back side 3 of the staircase unit 1 on the left and right girders 2 and 2 of the staircase unit 1. In the material mounting structure, the covering material 4 is positioned below the protrusion 5 protruding downward from the lower surface 2a which is the lower end of the girder 2 of the staircase unit 1 so that the upper surface 4a of the covering material 4 is located below. The structure is such that it is attached to the lower plate 22 on the lower end side of the girder 2 via the attachment means 6.

The staircase unit 1 is, for example, an outdoor steel staircase unit as disclosed in Patent Document 1, and is a staircase unit composed of a single staircase portion or a staircase unit composed of a staircase portion and a corridor. Alternatively, there is a staircase unit composed of a staircase, a landing, and a corridor.

As shown in FIG. 7A, the staircase portion 10 includes, for example, a plurality of tread plates 11, 11 ..., a plurality of riser plates 12, 12 ..., And left and right Sasara girders or girders 2, 2 called side girders. It is composed of. Note that FIG. 7A illustrates the Sasara girder.
That is, in the plurality of tread plates 11, 11 ..., each upper plate surface of each tread plate 11, 11 ... is a horizontal plane, and a straight line connecting the rear ends of each upper plate surface has a predetermined inclination angle with respect to the ground surface. It is installed so as to form an inclined line.
Further, each of the riser plates 12, 12 ... Is provided so that the plate surface extends in the vertical and horizontal directions, the lower end and the front end side of the lower tread plate 11 are connected, and the upper end and the upper tread plate 11 are rear. The end side is connected.
The staircase portion 10 is composed of a plurality of tread plates 11, 11 ... And a plurality of riser plates 12, 12 ... Provided so as to be continuous in the vertical and diagonal directions, and the right end of the step portion is the right girder. In addition to being connected to 2, the left end of the step is connected to the left girder 2, so that the step is supported by the left and right girders 2 and 2.
Further, of the left and right girders 2 and 2, for example, one girder 2 is connected to the outer wall of a building (not shown), and the other girder 2 is provided with a handrail support base 19 (see FIG. 2). A handrail (not shown) is provided on the support base 19. Further, the upper end side of the staircase portion 10 in the other girder 2 in the vertical inclination extension direction is supported by a support column (not shown) fixed to the ground.
The staircase portion 10 is provided with a turnbuckle 13 as a brace material that is hung and connected to the lower surfaces 2a of the left and right girders 2 and 2 in order to prevent shaking.

Further, although not shown, in the corridor, for example, girders are installed on the left and right sides in the extension direction of the corridor, and a predetermined distance is provided between the left and right girders in the direction along the extension direction of the corridor. A plurality of joists are arranged at a distance, and the left and right ends of each joist and the left and right girders are connected, and the floor material is installed on the floor base structure composed of the left and right girders and the plurality of joists. It is composed. Of the left and right girders, for example, one girder is connected to the outer wall of a building (not shown), the other girder is provided with a support base for a handrail (not shown), and the handrail is attached to the support base. Provided. Further, the other girder is supported by a support column (not shown) fixed to the ground (see Patent Document 1).

Further, although not shown, in the landing, for example, girders are installed on the left and right sides in the extension direction of the landing, and a plurality of girders are spaced between the left and right girders in a direction along the extension direction of the landing. The joists are arranged and the left and right ends of each joist and the left and right girders are connected, and the floor material is installed on the floor base structure composed of the left and right girders and a plurality of joists. .. The girders of the landing are connected to, for example, columns (not shown).

Hereinafter, as an example of the covering material mounting structure on the back side of the staircase unit according to the first embodiment, for example, the covering material mounting structure on the back side 3 of the staircase portion 10 will be described with reference to FIGS. 1 to 8.

As shown in FIGS. 2 and 7, the girder 2 has a substrate 21, a lower plate 22, and an upper plate 23 extending along an extension direction of the staircase portion 10 (a direction in which the staircase portion 10 is inclined and extended in the vertical direction). , It is formed of, for example, a long steel material having a length substantially the same as the length of the staircase portion 10 in the extension direction.
That is, the substrate 21 has a flat plate surface extending in the vertical direction and the extension direction of the staircase portion 10, and is composed of a flat plate whose lower side and upper side are formed on the inclined side corresponding to the inclination angle of the staircase portion 10.
The lower plate 22 and the upper plate 23 are flat plates extending in the same direction from the lower side and the upper side of the substrate 21 inclined in the extension direction of the staircase portion 10, that is, perpendicular to the flat plate surface of the substrate 21 and the extension of the staircase portion 10. It is formed by a flat plate having a flat plate surface extending along the direction.
That is, the upper plate 23 has an upper surface and a lower surface which are perpendicular to the flat plate surface of the substrate 21 and extend along the extension direction of the staircase portion 10, and the lower plate 22 has a flat plate surface of the substrate 21. It is a configuration having an upper surface and a lower surface which are flat plate surfaces which are perpendicular to the vertical direction and extend along the extension direction of the staircase portion 10. The lower surface of the lower plate 22 forms the lower surface 2a which is the lower end of the girder 2, that is, the lower surface 2a which is an inclined surface extending along the extension direction of the staircase portion 10.

The covering material 4 is attached to the lower plates 22 and 22 of the left and right girders 2 and 2 via the attaching means 6.
The covering material 4 is composed of, for example, a flat plate such as an aluminum resin laminated plate formed by laminating an aluminum sheet and foamed polyethylene.

The mounting means 6 includes a projecting object avoiding member 8 and a covering material side mounting member 9.

The projecting object avoiding member 8 is made of, for example, metal, and is composed of a long U-shaped member having a length substantially the same as the length of the staircase portion 10 in the extension direction.
As shown in FIG. 1, the projecting object avoiding member 8 is connected to the lower plate 22 of the girder 2 by connecting means such as a bolt 14 and a blind nut 15 in a state of being in contact with the lower surface 2a of the lower plate 22 of the girder 2. The upper connecting portion 31 formed by the flat plate portion, the vertical connecting portion 32 formed by the flat plate portion extending downward from the side edge of the upper connecting portion 31, and extending from the extension end (lower end) of the vertical connecting portion 32. It is configured to include a lower connecting portion 33 formed by a flat plate portion provided in the above and facing parallel to the flat plate surface of the upper connecting portion 31.

As shown in FIGS. 4 and 5, the projecting object avoiding member 8 is such a connecting portion at a portion where a connecting portion between the lower surface 2a of the lower plate 22 of the girder 2 and the end portion 13a of the turnbuckle 13 is located. Is a protrusion 5 that protrudes below the lower surface 2a of the lower plate 22 of the girder 2. Therefore, at the protruding portion of the protrusion 5, the lower surface 2a of the lower plate 22 of the girder 2 and the upper surface of the upper connecting portion 31 ( The flat plate surface) 31a cannot be brought into surface contact with the surface.
Therefore, the projecting object avoiding portion 35 is formed by removing the portion of the upper connecting portion 31 of the projecting object avoiding member 8 that will be located at the projecting portion of the projecting object 5. That is, the upper connecting portion 31 of the projecting object avoiding member 8 is formed with a notch so as to avoid the projecting object 5 which is a connecting portion between the end portion 13a of the turnbuckle 13 and the lower surface 2a of the lower plate 22 of the girder 2. A protrusion avoiding portion 35 is provided.
Then, the upper surface (flat plate surface) 31a of the upper connecting portion 31 of the projecting object avoiding member 8 and the lower surface 2a of the lower plate 22 of the girder 2 are surfaced so that the projecting object 5 is positioned inside the projecting object avoiding portion 35. After contacting, the upper connecting portion 31 of the projecting object avoiding member 8 and the lower plate 22 of the girder 2 are connected by connecting means such as bolts 14 and blind nuts 15 (see FIG. 1).

The end portion 13a of the turnbuckle 13 is connected to the lower plate 22 of the girder 2 by a connecting means such as a bolt 16 and a blind nut (not shown).
For example, a blind nut (not shown) is attached in advance to the upper surface (flat plate surface) 22a of the lower plate 22 of the girder 2, which is a position where the end portion 13a of the turnbuckle 13 and the lower plate 22 of the girder 2 are connected. By passing the bolt 16 through the bolt through hole (not shown) formed in the end 13a of the turnbuckle 13 and the lower plate 22 of the girder 2 and fastening the bolt 16 to the blind nut, the upper surface of the end 13a of the turnbuckle 13 ( The end portion 13a of the turnbuckle 13 is connected to the lower plate 22 of the girder 2 so that the flat plate surface) and the lower surface 2a of the lower plate 22 of the girder 2 are in surface contact with each other.

As shown in FIGS. 1 to 3, the covering material side mounting member 9 includes a girder side connecting member 40, a covering material side connecting member 50, and a parting member 60.
The girder side connecting member 40, the covering material side connecting member 50, and the parting member 60 are members formed of, for example, metal and extend along the extension direction of the staircase portion 10, respectively, and are extensions of the side portion 4c of the covering material 4. It is composed of long members that are almost the same length as the length.

The girder side connecting member 40 is formed in an L-shaped cross section, and is formed by a flat plate portion formed by a flat plate portion connected to the lower connecting portion 33 of the projecting object avoiding member 8 by connecting means such as a bolt 36 and a blind nut 37. The configuration includes a 41 and a vertical plate portion 42 formed by a flat plate portion extending downward from the side edge of the upper connecting portion 41.
As shown in FIG. 1, the bolt 36 avoids protrusions in a state where the upper surface (flat plate surface) 41a of the upper connecting portion 41 and the lower surface (flat plate surface) 33a of the lower connecting portion 33 of the protrusion avoiding member 8 are in surface contact with each other. By fastening to a blind nut 37 attached to the upper surface (flat plate surface) of the lower connecting portion 33 of the member 8, the upper connecting portion 41 of the girder side connecting member 40 and the lower connecting portion 33 of the protrusion avoiding member 8 are connected. Will be done.

The covering material side connecting member 50 has a vertical plate portion 51 formed of a flat plate portion formed in a U-shaped cross section and connected to the vertical plate portion 42 of the girder side connecting member 40 by a connecting means such as a screw screw 46. An upper plate 52 extending from the upper end edge of the vertical plate 51 toward the center position 10C in the width direction of the stairs, and a lower plate extending from the lower edge of the vertical plate 51 toward the center position 10C in the width of the stairs. It is a configuration including a unit 53.
The lower plate portion 53 includes a narrow width portion 53a extending from the lower end edge of the vertical plate portion 51 toward the center position 10C in the width direction of the stairs, and a side wall portion 53b rising above the extension end of the narrow width portion 53a. A cover material mounting plate portion 53c extending from the upper end of the side wall portion 53b toward the center position 10C in the width direction of the stairs is provided.
The vertical plate is in a state where the flat plate surface 42a on the 10C side of the vertical plate portion 42 of the girder side connecting member 40 in the width direction of the stairs and the flat plate surface 51a of the vertical plate portion 51 of the covering material side connecting member 50 are in surface contact with each other. By passing the screw screw 46 through the portion 42 and the vertical plate portion 51, the vertical plate portion 42 of the girder side connecting member 40 and the vertical plate portion 51 of the covering material side connecting member 50 are connected.

The parting member 60 is formed in a concave cross section for accommodating a screw head 66a of a connecting means such as a screw screw 66 for connecting the side portion 4c of the covering material 4 to the covering material mounting plate portion 53c of the covering material side connecting member 50. A groove portion 61 and a lower plate portion 62 are provided.
The groove portion 61 is formed by a bottom plate 61a having an upper surface (flat plate surface) 61t in contact with the lower surface 4b of the side portion 4c of the covering material 4 and vertical plate portions 61b and 61c extending downward from the left and right side edges of the bottom plate 61a. It is composed.
The lower plate portion 62 extends from the lower end of the vertical plate portion 61c on the side of the center position 10C in the width direction of the stairs portion in a direction approaching the center position 10C in the width direction of the stairs portion, and is spaced from the lower surface 4b of the side portion 4c of the covering material 4. It is composed of a plate portion having flat plate surfaces facing each other in parallel.

That is, the upper surface 4a of the side portion 4c of the covering material 4 and the lower surface 54 of the covering material mounting plate portion 53c of the covering material side connecting member 50 are brought into contact with each other, and the upper surface (flat plate surface) of the bottom plate 61a of the groove portion 61 of the parting member 60 is brought into contact with each other. ) 61t and the lower surface 4b of the side portion 4c of the covering material 4 are in contact with each other, and the screw screw 66 is attached to the bottom plate 61a of the parting member 60, the covering material 4, and the covering material mounting plate portion 53c of the covering material side connecting member 50. The side portion 4c of the covering material 4 is sandwiched between the covering material mounting plate portion 53c of the covering material side connecting member 50 and the bottom plate 61a of the groove portion 61 of the parting member 60. The covering member side connecting member 50 and the parting member 60 are connected to the portion 4c. It should be noted that the side portion 4c of the covering material 4 and the side end surface 4d of the covering material 4 so that the side end surface 4d of the side portion 4c of the covering material 4 and the side wall portion 53b of the lower plate portion 53 of the covering material side connecting member 50 face each other with a slight interval. The covering material mounting plate portion 53c of the covering material side connecting member 50 is connected.

That is, the mounting means 6 includes a projecting object avoiding member 8 and a covering material side mounting member 9.
Then, the projecting object avoiding member 8 is connected to the lower surface 2a which is the lower end of the girder 2, and the upper connecting portion 31 having the projecting object avoiding portion 35 for avoiding the projecting object and the lower connecting portion to which the covering material 4 is connected. The configuration includes 33 and a vertical connecting portion 32 that connects the upper connecting portion 31 and the lower connecting portion 33.
More specifically, the projecting object avoiding member 8 is formed by connecting the lower surface 2a, which is the lower end of the girder 2, with a long upper connecting portion 31 and a vertical connecting portion 32 along the elongated direction (inclination extension direction of the stairs portion 10). The upper connecting portion 31 is formed of a long member having a U-shaped cross section having a portion 33, and the upper connecting portion 31 is formed of a flat plate having a plate surface parallel to the lower surface 2a of the girder 2 and is formed from the plate surface of the flat plate. It is connected to the lower plate 22 of the girder 2 in a state where the lower end of the lower surface 2a of the girder is in contact with each other, and the lower connecting portion 33 has a plate surface parallel to the plate surface of the upper connecting portion 31 at a predetermined interval. The vertical connecting portion 32 is formed of a flat plate, and the vertical connecting portion 32 is formed by a flat plate connecting the side edge of the upper connecting portion 31 along the elongated direction and the side edge of the lower connecting portion 33 along the elongated direction. Reference numeral 35 denotes a structure formed by cutting out a part of the upper connecting portion 31.
Further, the covering material side mounting member 9 is configured to be attached to the side portion 4c of the covering material 4 and to be connected to the lower connecting portion 33 of the projecting object avoiding member 8.
More specifically, the covering member side mounting member 9 is connected to the girder side connecting member 40 connected to the lower connecting portion 33 of the projecting object avoiding member 8 and the girder side connecting member 40, and is connected to the covering material 4 as well. It is configured to include a covering member side connecting member 50 connected to the upper surface 4a of the side portion 4c, and a parting member 60 attached to the lower surface 4b of the side portion 4c of the covering material 4.

Next, a method of attaching the covering material to the back side of the staircase portion 10 will be described.
As shown in FIG. 7A, the back side 3 of the staircase portion 10 in which the turnbuckles 13 and 13 as brace materials are connected to the lower surfaces 2a and 2a of the left and right girders 2 and 2 along the extension direction of the staircase portion 10. When the covering material 4 is attached to, a projecting object avoiding member 8 having a projecting object avoiding portion 35 for avoiding the projecting object 5 which is a connecting portion between the end portion 13a of the turnbuckle 13 and the lower plate 22 of the girder 2 is manufactured in advance. To do.
The length of the projecting object avoiding member 8 in the long direction is formed to be a length corresponding to the length in the extension direction of the staircase portion 10 on the lower surface 2a of the girder 2.
Then, as shown in FIG. 7B, the lower plate 22 of the girder 2 corresponding to the projecting object avoiding member 8 is provided so that the projecting object 5 is located inside the projecting object avoiding portion 35 of the projecting object avoiding member 8. Connect to.
In this case, the upper connecting portion 31 of the projecting object avoiding member 8 is connected to the girder 2 by using a plurality of connecting means such as bolts 14 and blind nuts 15 arranged at predetermined intervals along the extension direction of the staircase portion 10. By connecting to the lower plate 22, the projecting object avoiding member 8 is in contact with the upper surface 31a of the upper connecting portion 31 of the projecting object avoiding member 8 so that the lower surface 2a of the lower plate 22 of the girder 2 is in contact with the girder 2. It is connected to the lower plate 22 (see FIGS. 6 (a) and 7 (b)).

Further, the side portion 4c of the covering material 4 is sandwiched between the covering material mounting plate portion 53c of the covering material side connecting member 50 and the bottom plate 61a of the groove portion 61 of the parting member 60, and the side portion 4c of the covering material 4 is inserted. With the side end surface 4d and the side wall portion 53b of the lower plate portion 53 of the covering material side connecting member 50 facing each other with a slight gap, the screw screw 66 is attached to the bottom plate 61a of the parting member 60 and the covering material 4. The covering material side connecting member 50 and the parting member 60 are attached to the side portion 4c of the covering material 4 by penetrating and fastening the side portion 4c and the covering material mounting plate portion 53c of the covering material side connecting member 50.
Further, in a state where the flat plate surface 51a of the vertical plate portion 51 of the covering material side connecting member 50 and the flat plate surface 42a of the vertical plate portion 42 of the girder side connecting member 40 are in contact with each other, a connecting means such as a screw screw 46 is attached to the covering material side. By penetrating and fastening the vertical plate portion 51 of the connecting member 50 and the vertical plate portion 42 of the girder side connecting member 40, the vertical plate portion 51 of the covering material side connecting member 50 and the vertical plate portion of the girder side connecting member 40 are fastened. 42 is connected.
As described above, the covering material 4 with the covering material side mounting member 9 to which the covering material side mounting member 9 is attached to the side portion 4c of the covering material 4 is manufactured.

Next, a method of connecting the girder-side connecting members 40, 40 of the covering material 4 with the covering material-side mounting member 9 to the projecting object avoiding members 8, 8 attached to the lower plates 22, 22 of the left and right girders 2, 2. 1 will be described with reference to FIGS. 1 and 6 (b) to 6 (d).
First, as shown in FIG. 6B, a blind is previously placed at the fastening position of the bolt 36 on the upper surface 41a of the upper connecting portion 41 of the girder side connecting member 40 on either the left or right side of the covering material 4 with the covering material side mounting member 9. The nut 37 is attached, and the bolt 36 is fastened on the upper surface 33b of the lower connecting portion 33 of the other projecting avoidance member 8 to which the other girder side connecting member 40 of the covering material 4 with the covering material side mounting member 9 is connected. A blind nut 37 is also attached to the position in advance (see FIG. 6A).
Then, the lower surface 41b of the upper connecting portion 41 of the one girder side connecting member 40 of the covering member 4 with the covering member side mounting member 9 and the upper surface 33b of the lower connecting portion 33 of the one protruding object avoiding member 8 come into contact with each other. As shown in FIGS. 6 (b) and 6 (c), the upper connecting portion 41 of the one girder side connecting member 40 is placed on the lower connecting portion 33 of the one protruding object avoiding member 8. A state in which the upper surface 41a of the upper connecting portion 41 of the other girder side connecting member 40 of the covering material 4 with the covering material side mounting member 9 and the lower surface 33a of the lower connecting portion 33 of the other projecting avoidance member 8 are in contact with each other. To do. In this state, the bolt 36 is passed through the bolt through hole (not shown) formed in the upper connecting portion 41 of the other girder side connecting member 40 and the lower connecting portion 33 of the other protrusion avoiding member 8, and the other. By fastening to a blind nut 37 attached to the upper surface 33b of the lower connecting portion 33 of the protruding object avoiding member 8, the upper connecting portion 41 of the other girder side connecting member 40 and the lower connecting portion 8 of the other protruding object avoiding member 8 are connected. The unit 33 is connected.
After that, as shown in FIG. 6D, the bolt 36 is an unexpected bolt formed in the lower connecting portion 33 of one projecting avoidance member 8 and the upper connecting portion 41 of one girder side connecting member 40. By penetrating through the through hole and fastening to the blind nut 37 attached to the upper surface 41a of the upper connecting portion 41 of one girder side connecting member 40, the upper connecting portion 41 of one girder side connecting member 40 and one of them are fastened. The lower connecting portion 33 of the projecting object avoiding member 8 is connected.
As described above, the covering material 4 with the covering material side mounting member 9 is connected to the projecting object avoiding members 8 and 8 attached to the lower plates 22 and 22 of the left and right girders 2 and 2.

The back side 3 of the staircase portion 10 is covered with the covering materials 4, 4 ... With the plurality of covering material side mounting members 9. That is, as shown in FIGS. 8A and 8B, the covering materials 4, 4 ... With the covering material side mounting member 9 are attached in order from the lower part to the upper part of the back side 3 of the staircase portion 10. .. In this case, the end face of the cover material 4 with the cover material side mounting member 9 adjacent to the top and bottom and the end face of the cover material 4 with the cover material side mounting member 9 may be mounted so as to abut each other, or the cover material side adjacent to the top and bottom may be abutted. A parting material (not shown) may be provided between the end surface of the covering material 4 with the mounting member 9 and the end surface of the covering material 4 with the mounting member 9 on the covering material side.

As described above, the plurality of covering materials 4, 4 ... With the covering material side mounting member 9 are positioned below the protrusions 5 in which the upper surface 4a of the covering material 4 projects downward from the lower surfaces 2a and 2a of the girders 2 and 2. As described above, the staircase portion 10 is attached to the girders 2 and 2 via the attachment means 6, and the back side 3 of the staircase portion 10 is covered with a plurality of covering materials 4, 4 ...

According to the covering material mounting structure on the back side of the staircase portion of the first embodiment, the upper surface 4a of the covering material 4 is positioned below the protrusion 5 protruding downward from the lower surface 2a of the girder 2 of the staircase portion 10. Since the covering material 4 is attached to the girder 2 via the attachment means 6, there is a protrusion 5 protruding downward from the lower surface 2a of the lower plate 22 of the girder 2 on the back side 3 of the staircase portion 10. Even so, the covering material 4 can be easily attached to the lower plate 22 on the lower end side of the girder 2 via the attaching means 6.

Specifically, it is a long member having a U-shaped cross section extending along the longitudinal direction of the girder 2, and has an upper connecting portion 31 connected to the lower plate 22 of the girder 2 and a side edge of the upper connecting portion 31. An upper portion having a vertical connecting portion 32 extending downward and a lower connecting portion 33 provided from an extension end of the vertical connecting portion 32 and facing the upper connecting portion 31 and connected to the lower plate 22 of the girder 2. The projecting object avoiding member 8 is formed with a projecting object avoiding portion 35 formed by a notch in the connecting portion 31 in order to avoid the projecting object 5 projecting below the lower surface 22b of the lower plate 22 of the girder 2. Since the covering material 4 is attached to the lower plate 22 of the girder 2, even if there is a protrusion 5 protruding downward from the lower surface 2a of the lower plate 22 of the girder 2, the covering material 4 can be attached to the girder. It can be easily attached to the lower plate 22 on the lower end side of 2.

Further, the girder side connecting member 40 of the covering material side mounting member 9 with the covering material side mounting member 9 to which the covering material side mounting members 9 and 9 are attached to the side portions 4c and 4c of the covering material 4 is used as the projecting object avoiding member 8. Since it is attached, the work becomes easy. In particular, the upper connecting portion 41 of one girder side connecting member 40 of the covering material side mounting member 9 provided on one side portion 4c of the covering material 4 is placed on the lower connecting portion 33 of the one protruding object avoiding member 8. Since the connection work is performed in the state of being placed on the wall, the work becomes easy.

Embodiment 2
In the first embodiment, the covering material 4 is attached to the left and right girders 2 and 2 via the mounting means 6 composed of the projecting object avoiding member 8, the girder side connecting member 40, the covering material side connecting member 50, and the parting member 60. Although the covering material mounting structure to be mounted on the lower plates 22 and 22 has been illustrated, the parting member 60 may not be used.
That is, the protrusion avoiding members 8 are attached to the lower plates 22 and 22 of the left and right girders 2 and 2, respectively, and the girder side connecting member 40 and the covering material side are attached to the left and right side portions of the covering material 4, respectively. A cover material side mounting member composed of the connecting member 50 is attached, and the girder side connecting member 40 of the covering material side mounting member provided on the left and right side portions 4c and 4c of the covering material 4 is attached to the left and right girders 2 and 2. It may be attached to the lower plates 22 and 22.

Embodiment 3
In the first and second embodiments, the girder side connecting member 40 and the covering material side connecting member 50 are combined to manufacture the covering material side mounting member. For example, a long material formed in a Z-shaped cross section is covered. It may be used as a material side mounting member.

Embodiment 4
Protruding object avoiding members 8 and 8 are attached to the lower plates 22 and 22 of the left and right girders 2 and 2, respectively, and the left and right side portions 4c and 4c of the covering material 4 are attached to the left and right projecting object avoiding members 8 and 8. It may be attached directly to the door by a connecting means such as a screw.
That is, without using the covering material side mounting member 9, the side portions 4c and 4c of the covering material 4 are attached to the lower plates 22 and 22 of the left and right girders 2 and 2 via the mounting means formed by the projecting object avoiding member 8. The structure may be such that it is attached.

In the above description, as the protrusion 5, the connecting portion between the lower surface 2a as the lower end of the girder 2 and the end portion 13a of the turnbuckle 13 as the brace material has been described as an example, but the protrusion is the lower end of the girder 2. Any projecting object may be used as long as it projects downward from the lower surface 2a. In the present invention, the projecting object avoiding members 8 and 8 are used to avoid the projecting object and cover the covering material 4. It can be attached to the lower plates 22 and 22 of the left and right girders 2 and 2.

Further, in the above description, the covering material mounting structure for covering the back side of the staircase portion 10 of the staircase unit 1 with the covering material 4 has been described as an example, but the covering material mounting structure of the present invention is the back side of the corridor of the staircase unit. The same applies to the case of covering the landing of the staircase unit or the case of covering the back side of the landing of the staircase unit.

1 Staircase unit, 2 girders, 2a girder lower surface (lower end of girder), 3 staircase unit back side, 4 covering material, 4a covering material upper surface, 4c covering material side part, 5 protrusions, 6 mounting means,
8 Projection avoidance member, 9 Covering material side mounting member, 13 Turnbuckle (brace material),
13a Turnbuckle end, 22 girder lower plate (lower end side of girder), 31 upper connecting part,
32 Vertical connection part, 33 Lower connection part, 35 Projection avoidance part.

Claims (4)

It is a covering material attachment structure for attaching a covering material covering the back side of the stairs unit to the girder of the stairs unit.
The covering material is attached to the lower end side of the girder via an attachment means so that the upper surface of the covering material is located below the protrusion protruding downward from the lower end of the girder of the staircase unit. Covering material mounting structure on the back side of the stairs unit. The mounting means includes a protrusion avoiding member formed by a long member long along the long direction at the lower end of the girder.
The projecting object avoiding member includes an upper connecting portion having a projecting object avoiding portion connected to the lower end of the girder and avoiding the projecting object, a lower connecting portion to which the covering material is connected, and an upper connecting portion and a lower connecting portion. The cover material mounting structure on the back side of the staircase unit according to claim 1, further comprising a vertically connecting portion for connecting. The covering to the back side of the staircase unit according to claim 2, wherein the mounting means includes a covering material side mounting member that is mounted on the side portion of the covering material and is connected to the lower connecting portion of the projecting object avoiding member. Material mounting structure. The covering material mounting structure on the back side of the staircase unit according to any one of claims 1 to 3, wherein the projecting object is a connecting portion between the lower end of the girder and the end portion of the brace material.

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