Staircase baseboard construction

Abstract

To lessen trouble of construction at a work site, mainly.SOLUTION: A staircase 4 is formed by connecting a plurality of stages of step parts 13 having a vertical riser 11 and a horizontal step board 12 so as to extend in an obliquely vertical direction 14. At a side part of the staircase 4, a baseboard 15 having a repeating step-shape along the staircase 4 is mounted. The baseboard 15 has a plurality of vertical baseboards 17 extending vertically along a front surface 16 of the vertical riser 11, and horizontal baseboards 19 extending horizontally along an upper surface 18 of the step board 12, alternately. The vertical baseboard 17 and the horizontal baseboard 19 are integrated and made to be an L-shaped right-angle baseboard 21 along one of the step parts 13.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a staircase baseboard structure. [Background technology]

[0002] In buildings with two or more floors, stairs are provided for ascending from lower floors to upper floors (for example, see Patent Document 1). Some stairs are formed by connecting multiple steps, each of which has a horizontal tread and a vertical riser, extending diagonally up and down.

[0003] Also, decorative materials called baseboards are attached to the sides of the stairs. Some baseboards have a repeating step shape along the stairs, and such baseboards are installed in multiple alternating rows, for example, horizontal baseboards that extend horizontally along the top surface of the treads and vertical baseboards that extend vertically along the front surface of the riser. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-204939 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the staircase baseboard structure (staircase baseboard structure) described in Patent Document 1 above, the horizontal and vertical baseboards are installed one by one at the construction site, which requires a lot of on-site processing of the horizontal and vertical baseboards, resulting in the problem that on-site construction is time-consuming and labor-intensive.

[0006] Therefore, a main object of the present invention is to contribute to improving the above-mentioned problems. [Means for solving the problem]

[0007] In response to the above problems, the present invention provides: For a staircase consisting of multiple steps with vertical risers and horizontal treads extending diagonally up and down, A repeating step-shaped baseboard is attached to the side of the staircase along the staircase; The baseboard includes a vertical baseboard extending vertically along the front surface of the riser board, A staircase baseboard structure having a plurality of alternating horizontal baseboards extending horizontally along the upper surface of the tread, The vertical and horizontal baseboards are integrated to form an L-shaped right-angle baseboard that is aligned along one of the step portions. And, The right-angle strips are provided with connecting devices that can be connected to each other, The connector includes a connector body located on the front side of the right-angle strip and having upper and lower overlapping portions that overlap the ends of the right-angle strip; a leg-like portion that protrudes from the rear surface side of the connector body and is interposed between the joints of the ends of the right-angle strip; The leg portion includes a fitting protrusion that can be fitted into a fitting recess provided at an end of the right-angle strip, The fitting recess and the fitting protrusion have a cross-sectional shape in which a groove bottom portion has a wide width and an open portion has a narrow width, The connector is attached to the upper end of the right-angle strip with the fitting protrusion protruding upward. It is characterized by the fact that Effect of the Invention

[0008] According to the present invention, the above-mentioned configuration can reduce the labor required for on-site construction. The connector has a connector body with an overlapping portion, so that the overlapping portion of the connector body can be used as an adjustment margin for the mating portion between the right-angle skirting boards. The connector has a leg-shaped portion, so that it can be used as a stopper that regulates the position of the end of the right-angle skirting board. The connector has an engagement protrusion on the leg-shaped portion, so that the connector can be easily connected and fixed to the right-angle skirting board by fitting the engagement protrusion into the engagement recess. Furthermore, the engagement recess and the engagement protrusion have a cross-sectional shape in which the groove bottom portion of the groove shape is wide and the open portion of the groove shape is narrow, so that the engagement recess and the engagement protrusion are unlikely to come off in the out-of-plane direction. Furthermore, by attaching the connector to the upper end of the right-angle skirting board with the engagement protrusion protruding upward to form a single component, the right-angle skirting board can be easily connected in order from the bottom by simply moving the right-angle skirting board from top to bottom and fitting the recess engagement into the engagement protrusion. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a partial perspective view of a staircase showing a staircase baseboard structure according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a side view showing the right-angle baseboard and the lower piece of the protrusion in FIG. 1. [Diagram 3] FIG. 3 is an enlarged side view of the connector of FIG. 2. [Figure 4] FIG. 13 is a partial rear view of a right-angle skirting board with a connector. [Diagram 5] This is a process diagram showing the construction procedure for a staircase baseboard structure. [Figure 6] This is a process diagram showing the construction procedure for the staircase baseboard structure, following Figure 5. [Figure 7] This is a process diagram showing the construction procedure for the staircase baseboard structure, following Figure 6. [Figure 8] This is a process diagram showing the construction procedure for the staircase baseboard structure, following Figure 7. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the present embodiment will be described in detail with reference to the drawings. 1 to 8 are intended to explain this embodiment. EXAMPLES

[0011] <Configuration> The configuration of this embodiment will now be described.

[0012] A staircase 4 is provided in a multi-storey building 1 having two or more floors for ascending from a lower floor to a higher floor.

[0013] The building 1 may be made of any material, such as wood, concrete, or steel, but may be, for example, a unit building. A unit building is a building 1 that can be constructed in a short period of time by transporting building units prefabricated in a factory to a construction site and assembling them there. When the building 1 is to be multi-story, the building units are constructed by stacking them one above the other at the construction site. The lower building unit then becomes the lower floor of the building 1, and the upper building unit becomes the upper floor of the building 1.

[0014] The stairs 4 are a means of transportation between floors of the building 1. There are various types of stairs 4, such as straight stairs consisting of only straight sections, and curved stairs that have a section for bending so that the direction can be changed.

[0015] The stairs 4 can be provided inside or outside the building 1, but this embodiment focuses on stairs (internal stairs) provided inside the building 1 (in the staircase space). If the building 1 is a unit building, the stairs 4 are mainly provided inside the building units on the lower floors. The stairs 4 can be installed in the lower floor building units in advance at the factory. Then, after the building units on the upper floors are stacked on top of the lower floor building units on which the stairs 4 are provided, the stairs 4 of the lower floor building units are connected to the building units on the upper floors. Note that in unit buildings, a dedicated staircase unit for the stairs 4 may be provided, and the stairs 4 may be installed in the staircase unit.

[0016] In addition to the basic configuration described above, the staircase baseboard structure of this embodiment can have the following configuration.

[0017] (1) For a staircase 4 consisting of a plurality of steps 13 each having a vertical riser 11 and a horizontal tread 12 extending diagonally in an upward and downward direction 14, A repeating step-shaped baseboard 15 is attached to the side of the staircase 4 along the staircase 4 . The baseboard 15 includes a vertical baseboard 17 extending vertically along the front surface 16 of the riser 11, The floor board has a plurality of horizontal baseboards 19 extending horizontally along the upper surface 18 of the tread board 12, arranged alternately. The vertical baseboard 17 and the horizontal baseboard 19 are integrated in advance to form an L-shaped right-angle baseboard 21 that fits along one of the step portions 13.

[0018] Here, riser 11 is a vertical board (thick board) that constitutes staircase 4, and determines the height of each step (step portion 13) of staircase 4. Riser 11 is preferably erected perpendicular to the horizontal line, but may be slightly inclined.

[0019] Riser board 11 has a horizontally long rectangular shape with a length corresponding to the width of staircase 4 and a width corresponding to the height of step portion 13 of staircase 4. If staircase 4 is a straight staircase, riser board 11 has the same length as the width of staircase 4, and if staircase is a curved staircase, riser board 11 has a length suited to the condition of the curved portion. Riser boards 11 are installed in the number corresponding to the height of staircase 4.

[0020] The tread 12 is a horizontal board (thick plank) that constitutes the staircase 4 and is directly stepped on when ascending or descending. The tread 12 is preferably installed in a horizontal state, but may be slightly inclined.

[0021] When the stairs 4 are straight stairs, the treads 12 are horizontally long rectangular with a required width and length corresponding to the width of the stairs 4. When the stairs 4 are curved stairs, the treads 12 are installed in at least a portion (the curved portion) in a shape other than horizontally long rectangular (for example, an approximately trapezoid or approximately triangular shape) that suits the situation of the curved portion. Approximately the same number of treads 12 as risers 11 are installed.

[0022] A step 13 is a small difference in height formed in the stairs 4 by one riser 11 and one tread 12. A large number of step sections 13 are formed between the lower and upper floors. The large number of step sections 13 are of approximately uniform height. The step sections 13 are set to a height that allows for comfortable ascent and descent. The height of the step section 13 is the width of the riser 11 plus the thickness of the tread 12.

[0023] The vertical direction 14 is a direction that connects the upper floor and the lower floor perpendicularly (vertical vertical direction). The diagonal vertical direction 14 is a direction of inclination that follows the inclination of the staircase 4.

[0024] The staircase 4 is a structure that makes it easy to go up and down between the upper and lower floors by forming a slope for going up and down with a number of step sections 13. The staircase 4 extends in an approximately diagonal upward and downward direction 14 with a number of step sections 13 repeated.

[0025] The staircase 4 is extended in a diagonal up-down direction 14 with risers 11 and treads 12 alternately connected. In the staircase 4, the periphery of the front end of a tread 12 is placed on the upper end of a riser 11, and the lower end of another riser 11 is placed on the periphery of the rear end of this tread 12, so that the risers are alternately connected.

[0026] The side of the stairs 4 refers to one end or both ends of the stairs 4 in the width direction 22. When the stairs 4 are provided against a wall inside the building 1, the side of the stairs 4 is a vertical side wall 23 located at one end or both ends of the stairs 4. When the stairs 4 are formed along the side wall 23, a baseboard 15 is installed against the side wall 23 as necessary.

[0027] If the stairs 4 are not formed along the side wall 23, for example if the side of the stairs 4 is an open space, there is no need to install the baseboard 15. The width direction 22 of the stairs 4 is the horizontal direction that defines the width of the stairs 4. In the case of a straight staircase, the width direction 22 of the stairs 4 is the direction in which the long sides of the risers 11 and treads 12 extend.

[0028] The staircase baseboard structure refers to the structure of the baseboard 15 installed on the side of the staircase 4 (on the side wall 23 thereof).

[0029] The baseboard 15 is a decorative material that covers and hides the boundary between the end of the staircase 4 in the width direction 22 and the sidewall 23. The baseboard 15 is attached to the sidewall 23 in a repeated step shape so as to follow the step portion 13 of the staircase 4. The baseboard 15 is mainly composed of a vertical baseboard 17 and a horizontal baseboard 19, whose faces are oriented in the same direction as the sidewall 23 and have a nearly constant thickness and width.

[0030] In the case of the baseboard 15 having a repeated step shape, the vertical baseboard 17 and the horizontal baseboard 19 are attached alternately to the side wall 23 in a state where they are combined at approximately right angles with their longitudinal directions (directions of the long sides) differing by 90 degrees.

[0031] The near side 16 (of riser 11) is the face that is on the near side (the face that faces towards you) when facing the stairs 4 from the lower floor side. The near side 16 is located on the near side of riser 11 in the depth direction 24 of the stairs 4. In contrast, the hidden side that is located on the far side of riser 11 in the depth direction 24 of the stairs 4 is the far side of riser 11.

[0032] In a straight staircase, the depth direction 24 of the stairs 4 is perpendicular to the surface of the riser 11 and is perpendicular to the width direction 22 and the up-down direction 14. In this case, the depth direction 24 of the stairs 4 is the thickness direction of the riser 11 and the width direction of the tread 12.

[0033] The vertical baseboard 17 is a decorative material that is installed on the side of the riser 11 so as to fit along the near side 16 of the riser 11. The vertical baseboard 17 is made of an elongated plate material (strip material) that is roughly rectangular or roughly parallelogram-shaped when viewed from the side (width direction 22 of the staircase 4), and is installed (or abutted) on the sidewall 23 with the plate surface facing in the width direction 22 of the staircase 4 and in surface contact with the sidewall 23. In the case of a straight staircase, the longitudinal direction of the vertical baseboard 17 is the up-down direction 14.

[0034] The top surface 18 (of the tread 12) refers to the upwardly facing surface of the tread 12. In contrast, the downwardly facing, concealed surface of the tread 12 is referred to as the underside of the tread 12.

[0035] The baseboard 19 is a decorative material that is installed on the side of the tread 12 so as to fit along the top surface 18 of the tread 12. The baseboard 19 is made of an elongated plate material (strip plate material) that is roughly rectangular or roughly parallelogram-shaped when viewed from the side, and is installed (or abutted) on the sidewall 23 with the plate surface facing the width direction 22 of the staircase 4 and in surface contact with the sidewall 23. In the case of a straight staircase, the longitudinal direction of the baseboard 19 is the depth direction 24 of the staircase 4.

[0036] The right-angle baseboard 21 is a component (baseboard component) of the baseboard 15 that mainly has an L-shaped or right-angled portion. The right-angle baseboard 21 is a composite part formed by combining at least one vertical baseboard 17 and one horizontal baseboard 19 in a substantially right-angled shape, joining them together, and integrating them. The right-angle baseboard 21 is used as one unit part that constitutes the baseboard 15.

[0037] The vertical baseboard 17 and the horizontal baseboard 19 can be joined together by, for example, an adhesive. The right-angle baseboard 21 is assembled as an integrated part in advance by joining the vertical baseboard 17 and the horizontal baseboard 19 together in a factory or the like, and then shipped as a product.

[0038] As a result, the right-angled skirting board 21 as a component has an angular shape (corner shape) that fits along one step portion 13 of the stairs 4, and one is attached to one step portion 13.

[0039] It is preferable that the right-angle baseboard 21 be installed at almost all of the step portions 13 that make up the stairs 4, and the entire baseboard 15 be made up almost entirely of the right-angle baseboard 21. However, depending on the situation, the baseboard 15 may be made up of only a portion of the right-angle baseboard 21 by attaching the right-angle baseboard 21 to some of the step portions 13 of the stairs 4. In other words, the baseboard 15 can have the right-angle baseboard 21 installed at least in one or more places, or in multiple places.

[0040] More specifically, as shown in Figure 2, the vertical baseboard 17 and the horizontal baseboard 19 that make up the baseboard 15 each have a mating portion at or near both ends that meet in a line contact state when viewed from the side. The mating portion is configured to form an angle of 90 degrees when mated.

[0041] The joints may be made by butting one end of the vertical and horizontal baseboards 17 and 19 against the side surface near the other end, but in this embodiment, the ends are butted against each other. For this reason, the ends of the vertical and horizontal baseboards 17 and 19 are formed with inclined portions of the same length.

[0042] That is, the vertical baseboard 17 is a plate material having a substantially parallelogram shape when viewed from the side. The front and back edges of the substantially parallelogram-shaped vertical baseboard 17 are parallel sides 17a, 17b (long sides) that extend substantially in the up-down direction 14. The upper and lower ends of the substantially parallelogram-shaped vertical baseboard 17 are parallel oblique sides 17c, 17d (short sides) that are inclined so that the front side is higher and the back side is lower.

[0043] Moreover, the baseboard 19 is a plate material having a substantially parallelogram shape when viewed from the side. The upper and lower edges of the substantially parallelogram-shaped baseboard 19 are parallel sides 19a, 19b (long sides) that extend substantially horizontally. The front and back ends of the substantially parallelogram-shaped baseboard 19 are parallel oblique sides 19c, 19d (short sides) that are inclined so that the upper end is located in the front and the lower end is located in the back.

[0044] Of these, the oblique sides 17c, 17d of the vertical baseboard 17 and the oblique sides 19c, 19d of the horizontal baseboard 19 form the joint portions described above.

[0045] The vertical baseboard 17 and the horizontal baseboard 19 are combined in the right-angle baseboard 21, for example, by butting adjacent ends of the vertical baseboard 17 and the horizontal baseboard 19 against each other.

[0046] In this embodiment, the right-angle baseboard 21 is integrated by joining the upper end (oblique side 17d) of the vertical baseboard 17 and the front end (oblique side 19c) of the horizontal baseboard 19 in a butted state. In this case, of the total of four joint parts of the vertical baseboard 17 and the horizontal baseboard 19 described above, the oblique sides 17d and 19c become the joint parts, which become the bent parts located in the middle of the right-angle baseboard 21.

[0047] In the right-angled baseboard 21 that has become one component, one end becomes the lower end (hypotenuse 17c) of the vertical baseboard 17, and the other end becomes the tip end (rear end (hypotenuse 19d)) of the horizontal baseboard 19 that is located on the opposite side to the vertical baseboard 17. These hypotenuses 17c, 19d (the remaining joint parts) become the connecting parts for the other right-angled baseboard 21.

[0048] The inclination angle of the oblique sides 17c, 17d of the vertical baseboard 17 and the oblique sides 19c, 19d of the horizontal baseboard 19 is set to 90 degrees when combined. In this embodiment, the angles of the oblique sides 17c, 17d and the oblique sides 19c, 19d are each set to 45 degrees, but this is not limited to this.

[0049] For example, as shown in Figures 5 to 8, when the stairs 4 are the above-mentioned curved stairs, they are provided with a direction change section 26 for turning and a landing 27. And, for the step section 13 constituting the direction change section 26 and the landing 27, as described above, deformed treads 12(A), 12(B) having a different shape from the treads 12 of the straight stairs (for example, a substantially trapezoidal or substantially triangular shape in plan view) are used.

[0050] For this reason, in areas where irregularly shaped treads 12(A), 12(B) are used, special right-angled skirting boards 21(A), 21(B) that fit the irregularly shaped treads 12(A), 12(B) are used.

[0051] For example, in the case of this embodiment, the right-angled baseboard 21(A) for the step portion 13 constituting the direction change section 26 is formed by previously attaching and integrating a horizontal baseboard 19(A) of a length that matches the depth dimension of the irregular shaped tread 12(A) to the upper end of the vertical baseboard 17.

[0052] In addition, the right-angle baseboard 21 (B) for the landing 27 is formed by previously attaching and integrating a first horizontal baseboard 19 (B) and a second horizontal baseboard 19 (C) of lengths that match the dimensions of each side along the side wall 23 of the irregular shaped tread 12 (B) to the upper end of the vertical baseboard 17.

[0053] (2) As shown in FIG. 3, the right-angled strips 21 may be fitted with connectors 31 that enable them to be connected to each other.

[0054] Here, the connector 31 is an auxiliary tool (joint member) for easily connecting (connecting) the right-angled strips 21 together by matching the ends that become the connecting portions of the right-angled strips 21. The connector 31 is made of resin, metal, or the like.

[0055] The connector 31 may be provided as a separate part from the right-angled strip 21, but it is preferable to combine the connector 31 and the right-angled strip 21 to form a single part.

[0056] The connectors 31 are attached to each right-angle strip 21 in advance at a factory or the like before the right-angle strips 21 are shipped. By installing the connectors 31 at either end (the same side) of the right-angle strips 21, the opposing ends of adjacent right-angle strips 21 can be connected with a single touch.

[0057] In this embodiment, the connector 31 is attached to the other end of the right-angled baseboard 21 (the oblique side 19d at the tip of the horizontal baseboard 19) in a state of inclination along the oblique side 19d. The connector 31 is installed on the oblique side 19d at the tip of the horizontal baseboard 19 so as to span the entire area of ​​the oblique side 19d.

[0058] As a result, the connector 31 is stably installed on the other end (or upper end) of the lower right-angled baseboard 21, making it easy and convenient to join when joining one end (or lower end) of the upper right-angled baseboard 21 in sequence.

[0059] More specifically, the connector 31 has a constant width dimension when viewed from the side (inside the width direction 22 of the staircase 4) and has a connector body 32 that has a length approximately equal to the upper end (of the hypotenuse 19d) of the right-angled baseboard 21 and extends continuously along the hypotenuse 19d.

[0060] The connector body 32 is located on the front side of the right-angled baseboard 21, and is the part exposed to the inside of the stairs 4, and has a decorative surface with the same surface design as the baseboard 15. The connector body 32 has parallel sides on both side edges that extend along the end (hypotenuse 19d) of the right-angled baseboard 21, and these both side edges become overlapping parts 33 that overlap the end (hypotenuse 19d) of the right-angled baseboard 21.

[0061] That is, the side edge located on the lower side of the connector body 32 overlaps a required amount on the surface side around the upper end (hypotenuse 19d) of the right-angled skirting board 21 to which the connector 31 is combined. Then, by connecting another right-angled skirting board 21 to the upper end of this right-angled skirting board 21, the side edge located on the upper side of the connector body 32 overlaps a required amount on the surface side around the lower end (hypotenuse 17c) of the other right-angled skirting board 21.

[0062] The overlapping parts 33 between the both side edges of the connector body 32 and the ends of the right-angled skirting bar 21 provide an adjustment margin for the connected state when connecting the right-angled skirting bars 21. The adjustment margin by the overlapping parts 33 is approximately half the width dimension of the connector body 32 or less.

[0063] The width direction of connector body 32 is a direction perpendicular to the upper and lower side edges, and the length direction of connector body 32 is the extension direction of the upper and lower side edges.

[0064] The upper end of the connector body 32 in the longitudinal direction forms a flat portion 32a extending in the width direction of the connector body 32 or in a direction perpendicular to the longitudinal direction of the connector body 32. In this embodiment, the flat portion 32a forms an inclined portion at an angle of 45 degrees.

[0065] Furthermore, the lower end in the longitudinal direction of the connector body 32 is a sharp tapered portion. In this embodiment, the sharp tapered portion forms the equilateral sides 32b, 32c of an isosceles right triangle.

[0066] 4, a leg-like portion 34 is provided between the connecting portions (joint portions) of the right-angle strips 21 and protrudes integrally from the back surface of the connector body 32. The leg-like portion 34 functions as a reinforcing rib that reinforces the connector body 32 from the back surface. The leg-like portion 34 also functions as a stopper that regulates the position of the end of the right-angle strip 21.

[0067] One or more leg portions 34 are erected at a widthwise intermediate position (for example, the width center portion) of connector body 32 along the longitudinal direction of connector 31, substantially perpendicular to connector body 32. When there is one leg portion 34 as in this embodiment, connector 31, which is the combination of connector body 32 and leg portion 34, has a T-shape in cross section.

[0068] The amount by which the leg portion 34 protrudes from the rear surface of the connector body 32 is approximately the same as or slightly shorter than the thickness of the baseboard 15 so as not to interfere with the sidewall 23. It is preferable that the amount by which the leg portion 34 protrudes is approximately constant over its entire length.

[0069] The leg portions 34 extend continuously along the rear surface of the connector body 32. The length of the leg portions 34 in the longitudinal direction of the connector 31 is the same as that of the connector body 32 or is slightly shorter than that of the connector body 32. When the connector 31 is made shorter than the connector body 32, the upper and lower ends of the leg portions 34 in the longitudinal direction are made to slightly not reach the positions of the upper and lower ends of the connector body 32 in the longitudinal direction.

[0070] The right-angle strip 21 is connected by the connector 31 in a state where the end of the right-angle strip 21 directly abuts against the leg portion 34 or is separated from the leg portion 34 with a clearance within the width of the overlapping portion 33.

[0071] This clearance is formed by adjusting the connection state of the right-angled baseboards 21 according to the state of the stairs 4. This clearance is hidden by the connector body 32 and cannot be seen from the outside, so it does not adversely affect the appearance of the connection part between the right-angled baseboards 21.

[0072] The leg portion 34 is provided at its longitudinal intermediate position with a fitting protrusion 42 that can fit into a fitting recess 41 provided at the end of the right-angle skirting board 21. The fitting protrusion 42 and the fitting recess 41 form a connecting portion that connects and fixes the connector 31 and the right-angle skirting board 21 together.

[0073] By fitting the fitting protrusion 42 into the fitting recess 41, the connector 31 is held detachably (or insertably and removable) on the right-angle baseboard 21. Depending on the degree to which the fitting protrusion 42 fits into the fitting recess 41, the above-mentioned clearance and the connection state between the right-angle baseboards 21 are adjusted, and the right-angle error is corrected.

[0074] The fitting recesses 41 are provided on the vertical and horizontal baseboards 17 and 19 constituting the right-angle baseboard 21 so as to open at both ends of the right-angle baseboard 21 (at positions that match the fitting protrusions 42). The fitting recesses 41 need only have a size and shape that allows at least the fitting protrusions 42 to fit into them. In this embodiment, the fitting recesses 41 are provided on the vertical and horizontal baseboards 17 and 19 constituting the right-angle baseboard 21 so as to be continuous over the entire longitudinal extent thereof and to be able to intersect with each other.

[0075] A pair of fitting protrusions 42 are provided at the same positions on both sides of the leg portion 34. The pair of fitting protrusions 42 are obliquely provided protruding from the leg portion 34 at different angles in a direction parallel to the surface of the connector body 32 so as to protrude outward beyond the side edges of the connector body 32. The pair of fitting protrusions 42 are integrally provided protruding from the leg portion 34 so as to form an angle of 90 degrees with each other in directions parallel to the two equal sides 32b, 32c constituting the tapered portion at the lower end of the connector body 32.

[0076] When a right-angle baseboard 21 equipped with such a connector 31 is installed on a staircase 4, the connector body 32 of the connector 31 is positioned on the front side of the baseboard 15 (the inside of the staircase 4) in an inclined state so as to cover the entire oblique side 19d at the tip of the right-angle baseboard 21 (the horizontal baseboard 19 that constitutes it).

[0077] At this time, the flat portion 32a at the upper end of the connector body 32 is positioned at the upper edge of the baseboard 15 to remove the corner portion (recessed corner portion) formed by the horizontal baseboard 19 and the vertical baseboard 17 at the upper edge of the baseboard 15.

[0078] Furthermore, the tapered portion at the lower end of connector body 32 has two orthogonal equal sides 32b, 32c located at the lower edge of baseboard 15 and oriented in the horizontal and vertical directions (up-down direction 14), respectively, and matches with a corner portion (recessed corner portion) formed between tread 12 and riser 11, etc. The tapered portion is attached to this corner portion with almost no gap.

[0079] The mating protrusions 42 of the connectors 31 are also oriented in horizontal and vertical directions, so that when the upper right-angled baseboard 21 is attached from directly above to directly below, the mating recesses 41 of the upper right-angled baseboard 21 are received from below.

[0080] The vertical baseboard 17 and the horizontal baseboard 19 may be made of wood, but may also be made of, for example, resin or a light metal (or metal) such as aluminum (or an aluminum alloy). When the vertical baseboard 17 and the horizontal baseboard 19 are made of resin or metal, the vertical baseboard 17 and the horizontal baseboard 19 can each be divided into a front plate 45 (Fig. 3) and a back plate 46 (Fig. 4), and the front plate 45 and the back plate 46 can be glued together to form an integrated structure.

[0081] In this case, the front panel 45 becomes the surface of the vertical baseboard 17 and the horizontal baseboard 19 facing the inside of the stairs 4, and becomes the decorative surface of the baseboard 15. It is preferable that the front panel 45 has the same color and pattern (e.g., wood grain pattern) as the riser 11 and the tread 12, for example.

[0082] If necessary, one or more embossed patterns 47 may be formed on the front plate 45. The embossed pattern 47 may be, for example, a groove formed on the front plate 45, which has a substantially constant width in the longitudinal direction as a whole, extends continuously in the longitudinal direction of the front plate 45 until it reaches both ends of the front plate 45, and is recessed to a substantially constant depth toward the back plate 46.

[0083] In addition, a concave-convex pattern 48 similar to the concave-convex pattern 47 may be provided on the connector body 32 so as to be continuous with the concave-convex pattern 47. In this case, the concave-convex pattern 48 has a bent shape bent at a right angle so that the two concave-convex patterns 47 of the vertical baseboard 17 and the horizontal baseboard 19 join together.

[0084] The back board 46 is the surface of the vertical baseboard 17 and the horizontal baseboard 19 that faces the outside of the stairs 4 and serves as the core material of the vertical baseboard 17 and the horizontal baseboard 19.

[0085] The back plate 46 can be formed to have the same length as the front plate 45 in the longitudinal direction, but it is preferable to make it slightly shorter than the front plate 45 so that the end of the back plate 46 is recessed slightly (for example, approximately half the thickness of the leg-like portion 34) from the end of the front plate 45.

[0086] As a result, for example, when connecting right-angle skirting boards 21 to each other, a time lag occurs before the front plate 45 and the back plate 46 each come into contact with the connector 31. Therefore, compared to a case in which the front plate 45 and the back plate 46 come into contact with the connector 31 at the same time, the insertability of the fitting recess 41 into the fitting protrusion 42 is improved, making it easier to connect right-angle skirting boards 21 to each other.

[0087] A single or multiple mating recesses 41 may be formed in the back plate 46. The mating recesses 41 may be, for example, grooves formed in the back plate 46 that have a substantially constant width in the longitudinal direction as a whole, extend continuously in the longitudinal direction of the back plate 46 until they reach both ends of the back plate 46, and are recessed to a substantially constant depth toward the front plate 45.

[0088] It is preferable that the fitting recess 41 has substantially the same cross-sectional shape as the fitting protrusion 42. The cross-sectional shapes of the fitting recess 41 and the fitting protrusion 42 may be, for example, rectangular, trapezoidal, or triangular.

[0089] The fitting recess 41 may have a cross-sectional shape (mutually constrained shape) that makes it difficult for the fitting recess 41 to come off in the out-of-plane direction. To achieve this, the fitting recess 41 and the fitting protrusion 42 are formed into a cross-sectional shape in which the groove bottom portion is wide and the open portion of the groove is narrow.

[0090] The fitting protrusion 42 is formed to an appropriate length so that the connected state can be maintained when fitted into the fitting recess 41, and so that the fitting protrusion 42 is easily fitted in the protruding direction and is difficult to come off. For example, the length of the fitting protrusion 42 is preferably approximately the same as the width dimension of the connector main body 32 or slightly longer than that.

[0091] It is preferable that the uneven patterns 47 on the front surface of the vertical baseboard 17 and the horizontal baseboard 19 and the mating recesses 41 on the back surface are formed at the same positions in the width direction so that the same uneven patterns 47 and the mating recesses 41 are continuous with each other between the vertical baseboard 17 and the horizontal baseboard 19.

[0092] In addition, it is preferable that the uneven pattern 47 and the fitting recess 41 are formed at positions offset from each other in the width direction so that they do not overlap or interfere with each other inside the vertical baseboard 17 and the horizontal baseboard 19.

[0093] In this embodiment, the embossed pattern 47 is formed near the edges (e.g., near the lower edges) of the vertical and horizontal baseboards 17 and 19 in the width direction. The fitting recesses 41 are formed near the center (e.g., slightly lower than the width center) of the vertical and horizontal baseboards 17 and 19. Even if the vertical and horizontal baseboards 17 and 19 are not formed by gluing together a front panel 45 and a back panel 46 but are an integral structure, the embossed pattern 47 and the fitting recesses 41 can be formed in the same manner as described above.

[0094] (3) As shown in FIG. 1, when the step 12 has a protruding portion 51 protruding toward the front side relative to the riser 11, The vertical baseboard 17 includes a protruding portion lower piece 52 located below the protruding portion 51, The projection 51 may be provided with a main body portion 53 located on the front side of the tip end of the projection 51 .

[0095] Here, protrusion 51 is a portion formed at the tip of tread 12 and its periphery by positioning riser 11 a required amount (for example, about several centimeters) behind the tip of tread 12. Protrusion 51 protrudes forward in depth direction 24 of staircase 4 beyond the surface (near front surface 16) of riser 11.

[0096] In this way, by forming the tip of the tread 12 and its surrounding area into the protrusion 51, the riser 11 is retracted further in than the tip of the tread 12, thereby preventing the inconvenience of accidentally kicking the riser 11 with the toes when climbing the stairs 4.

[0097] Protrusion lower piece 52 is part of the vertical baseboard 17 that is installed on the side wall 23 below the protrusion 51 so as to fit along the surface of the end of the riser plate 11. Protrusion lower piece 52 is a small piece that extends in the vertical direction 14 with a width the same as the amount of protrusion of protrusion 51 (from the front surface 16 of the riser plate 11) and a length the same as the height of the riser plate 11, and is an elongated member that is roughly rectangular when viewed from the side.

[0098] 1 and 2, the vertical side 52a on the front side of the protrusion lower piece 52 is flush with the position of the tip of the tread 12. Additionally, the vertical side 52b on the rear side of the protrusion lower piece 52 makes line contact in the up-down direction 14 with the front surface 16 of the riser 11. Additionally, side 52c constituting the lower end of the protrusion lower piece 52 contacts the upper surface 18 of the tread 12, and side 52d constituting the upper end contacts the underside of the protrusion 51.

[0099] The tip portion (of the step 12) is the edge portion on the near side in the depth direction 24 of the step 12.

[0100] The near side (of the protrusion 51) refers to a position that is nearer to the front side in the depth direction 24 than the tip of the tread 12. The main body 53 of the baseboard 17 is positioned so that the rear vertical side (side 17b in FIG. 2) is in line contact with the tip of the tread 12 and the near vertical side 52a of the protrusion lower piece 52.

[0101] Furthermore, since (the front vertical side 52a) of the protrusion lower piece 52 and (the rear vertical side 17b) of the main body 53 are in line contact with each other and fitted together without any gaps, it is expected that the joint line between the protrusion lower piece 52 and the main body 53 will be made less noticeable. Also, by providing the above-mentioned uneven pattern 47 extending in the longitudinal direction of the vertical baseboard 17 and the horizontal baseboard 19 on the baseboard 15, it is expected that the joint line between the protrusion lower piece 52 and the main body 53 will be made less noticeable by blending it into the uneven pattern 47.

[0102] The main body 53 is a board material that forms the main part of the vertical baseboard 17 (vertical baseboard main body). The vertical baseboard 17 is completed by joining the main body 53 and the protruding portion lower piece 52. In the right-angle baseboard 21, the main body 53 is formed to have a width dimension that is approximately the same as the width dimension of the horizontal baseboard 19. The opposing inclined ends (hypotenuses 17d, 19c) of the main body 53 and the horizontal baseboard 19 are made the same length and are joined accurately without misalignment.

[0103] Furthermore, because the tread 12 has a protrusion 51, when the vertical baseboard 17 is divided into a lower protrusion piece 52 and a main body portion 53, the tapered portion (equal sides 32b, 32c) of the lower end of the connector main body 32 fits into the corner portion (recessed portion) formed between the upper surface 18 of the tread 12 and the lower protrusion piece 52 (the lower part of the vertical side 52a).

[0104] (4) As described above, when the baseboard 17 is divided into the lower piece 52 and the main body 53 for the tread 12 having the protrusion 51, The right-angle baseboard 21 may be an integral unit of the main body 53 and the horizontal baseboard 19. The lower protrusion piece 52 may be an independent part from the right-angle baseboard 21 and may be installed below the protrusion 51 so as to be adjacent to the main body 53 of the right-angle baseboard 21.

[0105] <Function> The function of this embodiment will now be described.

[0106] In the case of a multi-storey building 1, stairs 4 are provided inside the building 1 for moving from a lower floor to an upper floor, or from an upper floor to a lower floor.

[0107] For example, if the building 1 is a unit building, the staircase 4 is installed inside the lower floor building unit. In this embodiment, the unit building is a unit building in which the staircase 4 is installed inside the lower floor building unit in a factory.

[0108] Furthermore, in this embodiment, after the stairs 4 are installed in the building unit in the factory, the baseboard 15 is installed on the side of the stairs 4 (on the side wall 23 thereof).

[0109] As shown in Figures 5 to 8, the baseboards 15 are installed by attaching right-angle baseboards 21 to each step 13 of the stairs 4 in order, starting from the lowest step 13. At this time, the right-angle baseboards 21 are dropped from above along the side walls 23, and are connected by connectors 31 attached to the upper ends of the lower right-angle baseboards 21.

[0110] Adjacent right-angled strips 21 are connected by fitting the fitting projections 42 into the fitting recesses 41. This operation of connecting the right-angled strips 21 together is repeated until the uppermost step 13 is reached.

[0111] When the vertical baseboard 17 is divided into the lower protruding piece 52 and the main body 53, the lower protruding piece 52 is first attached to the underside of the protruding portion 51 of each step portion 13, and then the above-mentioned right-angle baseboards 21 are connected to each other.

[0112] If the stairs 4 have a direction change section 26 or a landing 27, right-angled skirting boards 21(A), 21(B) made to fit the shape and size of the direction change section 26 or the landing 27 are attached to the direction change section 26 or the landing 27.

[0113] In this embodiment, the right-angle baseboard 21(A) for the direction change section 26 is formed by previously attaching and integrating a horizontal baseboard 19(A) of a length that matches the depth dimension of the irregular shaped tread 12(A) to the upper end of the vertical baseboard 17.

[0114] The right-angle baseboard 21 (B) for the landing 27 is formed by previously attaching and integrating a first horizontal baseboard 19 (B) and a second horizontal baseboard 19 (C) of lengths that match the dimensions of the sides along the side wall 23 of the landing 27 to the upper end of the vertical baseboard 17.

[0115] This completes the baseboard 15 in a repeating step shape along the side of the staircase 4. The installation of the baseboard 15 on the side wall 23 can be easily performed by simply installing the right-angle baseboard 21 as a unit part on each step section 13 and connecting them with connectors 31.

[0116] <Effects> According to this embodiment, the following effects can be obtained.

[0117] (Effect 1) One vertical baseboard 17 and one horizontal baseboard 19 that make up the baseboard 15 are integrated to provide a right-angled baseboard 21 that is substantially L-shaped (right-angled or angular) when viewed from the side and that fits along one step 13 of the stairs 4. This makes the right-angled baseboard 21 a unit part that makes up the baseboard 15, and makes it possible to produce the right-angled baseboard 21 in a factory as a part with high right-angle accuracy.

[0118] Also, the right-angle baseboard 21 is used as a unit part of the baseboard 15. This makes construction easier and more advantageous than preparing the vertical baseboard 17 and the horizontal baseboard 19 separately as independent parts and attaching the vertical baseboard 17 and the horizontal baseboard 19 alternately one by one to the side of the stairs 4 at the construction site. In other words, by using the right-angle baseboard 21, the number of parts can be reduced, the handling of the parts can be simplified, and the work and installation man-hours for the side of the stairs 4 can be reduced, so that the baseboard 15 can be completed in a short time and at low cost.

[0119] That is, the right-angle baseboard 21 can be easily installed by simply fitting it almost along the side (side wall 23) of the stairs 4 or dropping it in from above, at the front side of the riser 11 and the upper side of the tread 12 that make up one step 13. In this case, since the right-angle baseboard 21 is L-shaped, it can be self-supported at each step 13 of the stairs 4. Also, by installing the right-angle baseboards 21 in order so that they are adjacent in the diagonal up-down direction 14 along the stairs 4, the right-angle baseboards 21 are combined and connected so as to be mutually constrained, making the installation of the baseboard 15 easy.

[0120] If the horizontal baseboard 19 and the right-angle baseboard 21 were constructed as separate parts as in the past, each time the horizontal baseboard 19 or the right-angle baseboard 21 was attached to the side wall 23, it was necessary to fasten the horizontal baseboard 19 or the right-angle baseboard 21 to the side wall 23 individually in accordance with the accuracy of the staircase 4. Since there were many fastening processes as described above, the construction of the baseboard 15 required a great deal of work. In contrast, when attaching the right-angle baseboard 21, the time-consuming work such as the fastening processes described above can be significantly reduced or almost eliminated, and the work can be saved accordingly.

[0121] (Effect 2) In the above, the right-angle skirting board 21 and the connector 31 may be integrated into one component by attaching the connector 31 to the right-angle skirting board 21. This eliminates the need to attach the connector 31 to each right-angle skirting board 21 when connecting the right-angle skirting boards 21 together. Also, adjacent right-angle skirting boards 21 can be easily and quickly connected to each other via the connector 31 that is already attached to one of the right-angle skirting boards 21. This makes it possible to quickly and easily install multiple right-angle skirting boards 21 in order along the side wall 23 of the staircase 4.

[0122] By connecting the right-angled strips 21 to each other with the connector 31, the connecting parts of the right-angled strips 21 can be covered and hidden by the connector 31, resulting in a good appearance.

[0123] The connector 31 can easily absorb the right angle error of the stairs 4 (between the riser 11 and the tread 12) by adjusting the connection state of the connector 31 to the right angle skirting board 21 (such as the degree of fit between the fitting recess 41 and the fitting protrusion 42). Therefore, by using the connector 31, adjustment processing of the joints between the right angle skirting boards 21 can be eliminated.

[0124] In addition, as described above, since adjustment processing is not required for the joints between the right-angled baseboards 21, it is possible to attach the baseboards 15 to the stairs 4 in advance even at the factory. Therefore, the work of attaching the baseboards 15 to the sides of the stairs 4 at the construction site is eliminated, and the amount of work at the construction site can be reduced.

[0125] In particular, for example, when the building 1 is a modular building in which building units manufactured in advance at a factory are transported to a construction site and assembled there, it becomes possible to precisely install the stairs 4 and baseboards 15 inside the building units in advance at the factory. This makes it possible to improve the completeness of the building units at the factory stage and increase the productivity of the building units.

[0126] (Effect 3) In the above, when the tread 12 has a protruding portion 51 that protrudes forward relative to the riser 11, the baseboard 17 may be divided into a protruding portion lower piece 52 and a main body portion 53. In this way, the complex shape around the protruding portion 51 can be reproduced by combining parts with simple shapes, and the area around the protruding portion 51 can be processed in a factory.

[0127] By separating the protrusion lower piece 52 from the main body 53, the protrusion lower piece 52 becomes a small, simple-shaped, and easy-to-handle part, which makes it easy to process and adjust the shape of the protrusion lower piece 52 to match the actual state (right-angle accuracy, etc.) of the stairs 4. As a result, by matching the shape of the protrusion lower piece 52 to the shape of the underside of the protrusion 51, the right-angle error of the stairs 4 (the riser 11 portion) can be easily absorbed.

[0128] The protrusion lower piece 52 and the main body 53 only need to be attached separately to the underside of the protrusion 51 and to the front side of the tip of the protrusion 51, respectively. Therefore, even if the tread 12 has a protrusion 51, it is a simple task of first placing the protrusion lower piece 52 that matches the protrusion 51 under the protrusion 51, and then attaching the main body 53 to a position forward of the tip of the protrusion 51. This reduces the effort required for installing the vertical baseboard 17.

[0129] (Effect 4) In the above, the right-angle baseboard 21 may be formed by integrating the main body 53 of the vertical baseboard 17 with the horizontal baseboard 19. In this way, when the vertical baseboard 17 is configured by dividing it into the lower protruding piece 52 and the main body 53 for the tread 12 having the protruding portion 51, the shape of the right-angle baseboard 21 can be simplified. This makes it easier to increase the component precision of the right-angle baseboard 21.

[0130] By separating the protruding portion lower piece 52 from the right-angle baseboard 21 and making it an independent separate part, it becomes easier to improve the part precision of the protruding portion lower piece 52. In addition, the protruding portion lower piece 52 can be attached to the underside of the protruding portion 51 of the tread 12 prior to the right-angle baseboard 21.

[0131] Then, after attaching the protrusion lower piece 52 to the underside of the protrusion 51, the right-angle baseboard 21 having the main body 53 and the horizontal baseboard 19 is attached to the front side of the protrusion lower piece 52 and the tip of the protrusion 51, and to the upper side of the tread 12. As a result, the right-angle baseboard 21 is installed on the step 13, and the main body 53 of the right-angle baseboard 21 is adjacent to the protrusion lower piece 52, so that they are in line contact with each other without any gaps and match. Therefore, the vertical baseboard 17 or the right-angle baseboard 21 can be easily installed on the stairs 4 in which the protrusion 51 is formed on the tread 12. Also, even if the tread 12 has the protrusion 51, by installing the protrusion lower piece 52 and the right-angle baseboard 21, the baseboard 15 can be finished with a good appearance. [Explanation of symbols]

[0132] 4 stairs 11 Riser 12 Treadboard 13 Step 14 Up and down direction 15 Baseboard 16 Front side 17 Baseboard 18 Top 19 Baseboard 21 Right angle strip 23 Side wall 31 Connectors 51 Protrusion 52 Lower part of protrusion 53 Main body

Claims

1. For a staircase consisting of multiple steps with vertical risers and horizontal treads extending diagonally up and down, A repeating step-shaped baseboard is attached to the side of the staircase along the staircase; The baseboard includes a vertical baseboard extending vertically along the front surface of the riser board, A staircase baseboard structure having a plurality of alternating horizontal baseboards extending horizontally along the upper surface of the tread, The vertical baseboard and the horizontal baseboard are integrated to form an L-shaped right-angle baseboard that is aligned along one of the step portions, The right-angle strips are provided with connecting devices that can be connected to each other, The connector includes a connector body located on the front side of the right-angle strip and having upper and lower overlapping portions that overlap the ends of the right-angle strip; a leg-like portion that protrudes from the rear surface side of the connector body and is interposed between the joints of the ends of the right-angle strip; The leg portion includes a fitting protrusion that can be fitted into a fitting recess provided at an end of the right-angle strip, The fitting recess and the fitting protrusion have a cross-sectional shape in which a groove bottom portion has a wide width and an open portion has a narrow width, A staircase baseboard structure characterized in that the connecting device is attached to the upper end of the right-angle baseboard with the engaging protrusion protruding upward.

2. The staircase baseboard structure according to claim 1, The right-angle strip has a front plate and a back plate, A staircase baseboard structure characterized in that the back board is shorter than the front board and an end of the back board is recessed relative to an end of the front board.

3. The staircase baseboard structure according to claim 1 or 2, The step has a protruding portion that protrudes forward from the riser, The vertical baseboard has a protrusion lower piece located below the protrusion, A staircase baseboard structure characterized in that it is provided with a main body portion located forward of the tip of the protrusion and a baseboard portion located forward of the tip of the protrusion.

4. The staircase baseboard structure according to claim 3, The right-angle baseboard is formed by integrating the main body and the horizontal baseboard, The staircase baseboard structure is characterized in that the lower piece of the protrusion is an independent part from the right-angle baseboard, and is adjacent to the main body of the right-angle baseboard while being installed below the protrusion.

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