JP2017008567A - Safety construction stair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety construction stair in which the rear ends of a base tread can be supported from a lower side.SOLUTION: A safety construction stair of the present invention includes multiple base treads 21 disposed in the diagonal direction at intervals. An upper end of a riser 3 disposed between adjacent base treads 21 is disposed in response to a front lower surface of the base treads 21 of the upper side. Also, a decoration tread 25 is stuck to the upper surface of the base tread 21 and becomes a finished state with respect to a temporary construction state where the front surface lower end of the riser 3 is disposed in response to the rear end of the base tread 21 of the lower side. In the front surface lower end of the riser 3, a tread insertion groove 30 is formed in response to the rear end of the base tread 21, and is disposed in the state where the rear end of the base tread 21 is inserted in the tread insertion groove 30.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a safe construction stair that can be used as a temporary stair for building work in a temporary state before finishing.

  As shown in Patent Document 1, a conventional wooden indoor staircase is conventionally configured by alternately arranging horizontal step plates and vertical rake plates. Such indoor staircases are not used during construction work, and workers should use the temporary staircases (temporary staircases) assembled at the construction site to go downstairs and upstairs. ing.

  On the other hand, in recent years, when building a detached house, it is used as a temporary staircase for building work in a temporary state before finishing, and finally the temporary staircase is finished to complete the assembly. Safety construction stairs that can be used as stairs are well known.

  For example, in the safe construction stairs shown in Patent Documents 2 and 3 below, the step board is composed of a base step board and a decorative step board attached to the upper surface (surface) of the base step board. During construction, a temporary state before the decorative step board is pasted on the base step board is set, and the staircase in the temporary state is used as a temporary stairway (temporary scaffolding) for building work. Furthermore, after a predetermined construction work is completed, a decorative step board is attached to the upper surface of the base step board in the temporary staircase to complete the assembly, thereby completing a normal indoor staircase.

Japanese Utility Model Publication No. 58-89529 JP2013-144484A No. 7-35979

  In the safety construction stairs shown in Patent Documents 2 and 3, both end portions of the base step plate are supported from the lower side by a side plate or the like, and the front end side is supported from the lower side by a lower indenting plate. . However, the rear end side of the base plate is disposed so as to face the lower front surface of the upper indenting plate, and is not supported from the lower side. For this reason, for example, when a high load is applied to the base corrugated board, there is a possibility that harmful bending deformation occurs such that the central portion on the rear end side of the base corrugated board sinks.

  On the other hand, it is possible to prevent the above-mentioned bending deformation by increasing the thickness by increasing the thickness of the base plate, but if so, the material cost increases as the plate thickness increases and the cost increases. In addition, a new problem arises in that the weight increases and the handling work of the base plate becomes difficult and the assembly workability deteriorates.

  The present invention has been made in view of the above problems, and can be used as a work staircase in a temporary state before finishing.In addition, the rear end of the base plate is also reduced while reducing costs and improving assembly workability. An object of the present invention is to provide a safe construction stair that can be supported from the lower side and can prevent the occurrence of harmful deflection deformation in the base step board.

  In order to solve the above problems, the present invention comprises the following means.

[1] Provided with a plurality of base plate arranged at intervals in an oblique direction, the upper end of the squeeze plate arranged between the adjacent base plate corresponding to the front lower surface of the upper base plate For the temporary state where the front lower end portion of the rake plate is arranged corresponding to the rear end of the lower base step plate, a decorative step plate is attached to the upper surface of the base step plate. It is a safe construction stair that will be in a finished state
A step plate insertion groove corresponding to the rear end of the base step plate is formed in the front lower end portion of the scraping plate, and the rear end of the base step plate is inserted into the step plate insertion groove. Safe construction stairs characterized by being arranged.

[2] The lower side of the step plate insertion groove is configured as a base step plate insertion portion for inserting the base step plate,
A gap between the upper surface of the base plate in the step plate insertion groove and the inner peripheral upper side surface of the step plate insertion groove is configured as a decorative step plate insertion portion,
The safe construction staircase according to the preceding item 1, wherein a rear end of the decorative step board is inserted in the decorative step board insertion portion in a finished state.

  [3] The safe construction staircase according to the above item 2, wherein the upper rear end of the decorative step board is disposed in pressure contact with the inner peripheral upper side surface of the step board insertion groove.

  [4] The preceding item 2 or 3, wherein the decorative corrugated board is formed thicker than the decorative corrugated board insertion portion, and the rear end of the decorative corrugated board is inserted into the decorative corrugated board insertion portion in a compressed state. Safe construction stairs as described in.

  [5] A configuration in which an adhesive interposed between the base plate and the decorative plate expands so that an upper surface rear end of the decorative plate is pressed against an inner peripheral upper surface of the step plate insertion groove. 5. The safe construction staircase according to any one of items 2 to 4 above.

[6] A base plate notch recess is formed at the rear end of the top surface of the base plate,
6. The safe construction staircase according to any one of the preceding items 2 to 5, wherein the front end position of the base step plate notch recess is disposed in front of the front surface of the upper indenting plate.

  [7] The item described in any one of the above items 2 to 6, wherein a rear edge of the decorative step board is formed thin by forming a notch recess in the lower face of the lower surface of the decorative step board. Safety construction stairs.

  [8] The safe construction staircase according to any one of items 2 to 7, wherein a depth of the base step board insertion portion is deeper than a depth of the decorative step board insertion portion.

  [9] The items 2 to 8 above, wherein the thickness of the base step plate is thicker than that of the base step plate insertion portion, and the rear end of the base step plate is inserted into the base step plate insertion portion in a compressed state. The safe construction staircase according to any one of the above.

  [10] The safety construction stair according to any one of the preceding items 1 to 9, wherein a base step plate side surface chamfered portion is formed at a lower edge portion of the rear end surface of the base step plate.

  [11] The safety construction stair according to any one of the preceding items 1 to 10, wherein a side plate chamfering portion is formed below the opening edge of the step plate insertion groove in the base plate.

[12] In the temporary state, a peelable curing material is laminated on the front surface of the rake plate,
The safe construction staircase according to any one of the preceding items 1 to 11, wherein the curing material is removed from the rake plate in a finished state.

[13] A decorative board decorative material that can be attached to the front surface of the electronic board is provided,
In any one of the preceding paragraphs 1 to 11, wherein the kake board is in a state in which the kake board decorative material is removed in the temporary state, and in a finished state, the kake board decorative material is attached to the kink board. Safe construction stairs as described in.

  [14] The safety construction staircase according to any one of items 1 to 13, wherein a step nose is provided to cover a front end portion of the base plate and the decorative plate.

  [15] The safe construction staircase according to the above item 14, wherein the step nose is formed integrally with the decorative step board.

[16] A male ridge is formed on the front end surface of the decorative corrugated board, and a female ridge is formed on the back side of the nose,
15. The safe construction staircase according to item 14, wherein the male ridge portion is fitted into the female ridge portion, and the nose is attached to the decorative step board.

  [17] A cushioning material that is compressed and deformed by the decorative stepboard is disposed in the decorative stepboard insertion portion for inserting the decorative stepboard in the stepboard insertion groove, and the decorative stepboard is restored by the restoring force of the cushioning material. The safe construction staircase according to the preceding item 16, wherein the staircase is pushed forward and the front end of the decorative step board is pressed against the nose.

[18] A side plate that supports a side edge of the base plate and a side edge of the rake plate,
On the upper edge of the side plate, horizontal step plate mounting portions that support the lower surfaces of both sides of the base step plate, and vertical scoop plate mounting portions that support the bottom ends of both sides of the scoring plate are alternately provided,
18. The safety construction according to any one of the preceding items 1 to 17, wherein a notch portion for inserting a dent plate for inserting and arranging a lower end of the dent plate at a rear end of the step plate attachment portion of the side plate is formed. Stairs.

  According to the safe construction staircase of the invention [1], the rear end of the base step board can be supported from the lower side by the step board insertion groove of the upper indenting board, so that the rear end of the base step board sinks. Thus, it is possible to reliably prevent the occurrence of harmful and harmful deflection deformation. Further, since a thin and lightweight base plate can be used, the material cost can be reduced by reducing the thickness, and the handling work of the base plate can be easily performed by reducing the weight, thereby improving the assembly workability. Further, since the base plate can be easily positioned by simply inserting the base plate into the plate plate insertion groove, the assembling workability can be further improved.

  According to the safe construction staircase of the invention [2], the rear end of the decorative step board is inserted into the step plate insertion groove of the scooping plate, so that the fit of the rear end of the decorative step board is improved, and a good aesthetic appearance is obtained. Can be obtained.

  According to the safe construction steps of inventions [3] to [5], it is possible to prevent a gap from being formed at the upper opening edge of the step plate insertion groove, and it is possible to more reliably obtain a good aesthetic appearance.

  According to the safe construction steps of the inventions [6] and [7], even if the width of the decorative step board insertion portion is narrow, the decorative step plate can be reliably inserted into the decorative step plate insertion portion.

  According to the safe construction stairs of the invention [8], when the base step board is inserted into the base step board insertion portion, the base step board can be positioned in the upward direction, so that the assembly workability is further improved. Can do.

  According to the safe construction staircase of the invention [9], the base step plate can be firmly and stably fitted into the base step plate insertion portion, and the misalignment of the base step plate can be reliably prevented.

  According to the safe construction steps of the inventions [10] and [11], the base step plate can be reliably inserted into the step plate insertion groove.

  According to the safe construction steps of the inventions [12] and [13], makeup can be reliably applied to the kink plate in the finished state.

  According to the safe construction steps of the inventions [14] to [16], the nose can be securely attached to the front ends of the base plate and the decorative plate.

  According to the safe construction staircase of the invention [17], the decorative step board can be attached in a stable state.

  According to the safe construction staircase of the invention [18], when the squeeze plate is inserted into the squeeze plate insertion notch of the side plate, the squeeze plate can be positioned with respect to the side plate. Therefore, the assembly workability can be further improved.

FIG. 1A is a perspective view for explaining the configuration of a safe construction staircase according to an embodiment of the present invention. FIG. 1B is a perspective view for explaining the configuration of the staircase of the embodiment. FIG. 1C is a perspective view for explaining the configuration of the staircase of the embodiment. FIG. 1D is a perspective view for explaining the configuration of the staircase of the embodiment. FIG. 2 is a perspective view for explaining the mounting state of the mounting plate in the staircase of the embodiment. FIG. 3 is an exploded side view of the temporary staircase in the staircase of the embodiment. FIG. 4 is a side view showing a state in the middle of mounting the base plate in the staircase of the embodiment. FIG. 5 is a side view showing a temporary stair assembly state in the staircase of the embodiment. FIG. 6 is a side view showing a state in the middle of attaching the decorative step board in the staircase of the embodiment. FIG. 7 is a side view showing a finished state in the staircase of the embodiment. FIG. 8 is an enlarged side view showing the periphery of the step plate insertion groove in the staircase of the embodiment. FIG. 9 is a side view showing the periphery of the step board insertion groove in the safe construction staircase according to the first modification of the present invention. FIG. 10 is a side view showing the periphery of the step board insertion groove in the safe construction staircase according to the second modification of the present invention. FIG. 11 is a side view showing the periphery of the step board insertion groove in the safe construction staircase according to the third modification of the present invention. FIG. 12 is a side view showing the vicinity of the front end portion of the step board in the safety construction staircase according to the fourth modified example of the present invention. FIG. 13A is a side view showing the vicinity of a step board insertion groove in a safe construction staircase that is a fifth modification of the present invention. FIG. 13B is a side view showing the vicinity of the step board insertion groove in the safe construction staircase according to the sixth modification of the present invention. FIG. 14A is a side view for explaining the state of nailing the base plate in the safe construction staircase of the present invention. FIG. 14B is a side view for explaining the state of nailing the base plate in the safe construction staircase of the present invention. FIG. 14C is a side view for explaining the state of nailing the base plate in the safe construction staircase of the present invention.

  FIG. 1A to FIG. 1D are perspective views for explaining the structure of a doll platform staircase to which a safe construction staircase according to an embodiment of the present invention is applied. In the present embodiment, the direction in which the user is facing when going down the stairs is referred to as “front side”, and the direction in which the user is facing when going up the stairs is described as “rear side”. 1A to 1D, the lower side is constituted by a straight staircase and the upper side is constituted by a rotating staircase. However, in the following description, in order to facilitate the understanding of the invention, the straight staircase portion is provided with a main staircase. The case where the invention is applied will be described as an example. However, the present invention is not limited to a straight staircase but can be applied to a rotating staircase.

  As shown in FIG. 1A, a pair of side plates (both side plates) 1, 1 are fixed to a column 9 as a house structure material, and the side plates 1, 1 are arranged obliquely along both sides of the staircase construction area. Is done. Needless to say, the side plate 1 is not limited to the support column 9 and may be supported by another structural member such as a wall surface.

  Further, as shown in FIG. 1B, a plurality of squeezing plates 3 are attached to both side plates 1 and 1 in a vertical arrangement at an appropriate interval in an oblique direction. As will be described later, a transparent curing film is attached to the surface (front surface) of the dent plate 3.

  Further, as shown in FIG. 1C, a plurality of base step plates 21 are attached in a horizontal arrangement at appropriate intervals in an oblique direction between the adjacent concave plates 2 in the side plates 1 and 1. This state is referred to as a temporary state in the present embodiment, and the upper end of the scooping plate 2 disposed between the adjacent base step plates 21 is disposed corresponding to the front lower surface of the upper base step plate 21, The front lower end portion of the rake plate 2 is disposed corresponding to the rear end of the lower base plate 21. In this embodiment, the temporary staircase (temporary staircase) is used as a work staircase for building work. For example, interior work is performed using this temporary staircase.

  And finally, as shown to FIG. 1D, while the decorative step board 25 is affixed on the base | substrate step board 21 in a temporary assembly stair, the curing film affixed on the rake board 3 is peeled off. Thus, the finished state is obtained, and the finished staircase (finished staircase) is used as a normal indoor staircase for a resident.

  Here, in the present embodiment, among the two squeeze plates 3 adjacent to the rear end side (upper side) and the front end side (lower side) of the predetermined base plate 21, the squeeze plate 3 adjacent to the rear end side. Will be referred to as the upper squeezing plate 3 and the squeezing plate 3 adjacent to the front end side will be referred to as the lower squeezing plate 3. In the present embodiment, the term “stepboard” simply includes both the base plate 21 and the decorative plate 25.

  1A to 1D are not necessarily consistent with the construction procedure, and the work of attaching the upper board 3 and the work of attaching the base step board 21 to the lower front side of the board 3 from the lower floor to the floor. The most common construction procedure is to assemble the board 3 and the base plate 21 alternately by going upward. Further, many construction procedures are employed in which the upper stepping plate 3 is attached to the base plate 21 and the base plate with the plate is sequentially assembled to the side plate 1 from the lower level to the upper level. However, in the present invention, the construction procedure of the stairs is not limited, and any procedure may be assembled, but the stairs are assembled sequentially from the bottom as compared with the case where the stairs are assembled sequentially from the top. You can assemble the stairs more efficiently and smoothly.

  Hereinafter, the configuration of the stepped stairs of this embodiment will be described in detail.

  As shown in FIG. 1A, the side plate 1 of the staircase staircase is arranged so as to extend obliquely at a predetermined inclination angle. The upper edge of the side plate 1 is cut out in a step shape so that horizontal cuts and vertical cuts are alternately arranged. A horizontal cut end is configured as a corrugated plate mounting top 12, and a vertical cut end is configured as a rake plate mounting top 13.

  In this embodiment, the corrugated plate attachment lip 12 is configured as a corrugated plate attachment portion, and the dent plate attachment lip 13 is configured as a concavity plate attachment portion.

  At the rear end of the corrugated board mounting mouth 12 in the side plate 1, there is formed a notch board insertion notch 14 that opens upward corresponding to the scoring board mounting mouth 13.

  In the present embodiment, the side plate 1 is made of a woody material such as a plywood having a thickness of 18 mm, for example.

  As shown in FIG. 2 and FIG. 3, the dent plate 3 has a step plate insertion groove 30 formed along the step width direction (the dent plate length direction) at the lower portion on the front surface (front surface) side. Under the step plate insertion groove 30, a base step plate insertion portion 31 for inserting and arranging the rear end insertion portion 23 of the base step plate 21 is provided. A decorative board insertion portion 35 for inserting and arranging the end edge is provided. The base corrugated board insertion portion 31 and the decorative corrugated board insertion portion 35 will be described in detail later.

  In the present embodiment, the depth (depth) of the base corrugated board insertion portion 31 is formed deeper than the depth (depth) of the decorative corrugated board insertion portion 35, and the bottom surface (rear surface) of the base corrugated board insertion portion 31. Is arranged behind the bottom surface (rear surface) of the decorative cardboard insertion portion 35.

  In this embodiment, the material of the rake board 3 can be a wood-based material, for example, a plywood having a thickness of 12 mm to 30 mm can be suitably used. A 21 mm thick plywood is adopted as the material of the scooping plate 3 of the present embodiment.

  In addition, at least a portion above the step plate insertion groove 30 on the front surface (front surface) of the scooping plate 3 is decorated, and a transparent curing film (not shown) is pasted on the makeup portion as a curing material. It has been.

  In this embodiment, a transparent curing film (sheet) is used as a curing material, but the present invention is not limited to this, and other curing materials may be used. For example, it is not limited to a film or a sheet, and a curing material composed of paper, tape, or the like can be used. Further, the curing material is not limited to a transparent material, and an opaque or translucent colored material can also be used.

  As shown in FIG. 1B and FIG. 2, in order to assemble the scoring plate 3 with the curing film to the pair of side plates 1, the back side of the scoring plate 3 ( The lower end of the squeeze plate 3 is inserted into the squeeze plate insertion notch 14 of the both side plates 1 so that both side edges of the rear side are aligned, and the squeeze plate 3 is glued in that state. Fix in combination. That is, an adhesive is applied so as to be interposed between the both side edges of the back surface side of the scooping plate 3 and the scissor plate mounting mouth 13 of the side plate 1, Then, a nail (not shown) such as a finish nail is driven in and fixed to the wooden plate 13 for mounting the scooping plate. In this way, the scooping plate 3 is fixed to the side plate 1.

  Here, in the present embodiment, when the squeeze plate 3 is inserted into the squeeze plate insertion notch 14 of the side plate 1, the squeeze plate 3 can be positioned with respect to the side plate 1. 3 can be easily and accurately arranged at a predetermined assembling position, and the assembling workability can be improved.

  Further, after the scoring plate 3 is inserted and disposed in the scoring plate insertion notch 14, the scoring plate 3 is temporarily held by the scoring plate insertion notch 14 and the mounting posture is maintained even if the operator does not support it. Therefore, the operator can use both hands freely to perform the fixing operation of the scooping plate 3 such as a nailing operation. Therefore, it is possible to easily and smoothly carry out the assembling and fixing work of the kneading plate 3 and to further improve the assembling workability.

  In the present embodiment, in a state where the dent plate 3 is assembled to the side plate 1, the step plate insertion groove 30 of the dent plate 3 is disposed above the step plate mounting top 12 of the side plate 1. Yes.

  As shown in FIG. 3 and FIG. 4, the base step plate 21 has an L-shaped cross section that is continuous with the rear end edge of the upper surface along the step width direction (step plate length direction) and opens upward and rearward. The base plate cutout concave step portion 22 is provided. The front end position of the base step plate notch concave step portion 22 is arranged in front of the front surface of the upper indenting plate 3 when the base step plate 21 is assembled. As will be described in detail later, the base step board notch recess step portion 22 corresponds to the base step plate notch recess portion, and is used to easily insert the decorative step plate 25 into the decorative step plate insertion portion 35. Is.

  As shown in FIG. 8, the thickness T <b> 1 of the rear end insertion portion 23 of the base step board 21, that is, the portion where the base step board notch concave step portion 22 is formed in the base step board 21 is lower than the bottom board plate 21. It is formed to be slightly larger (thicker) than the width dimension (gap dimension) W1 of the ground plate insertion portion 31.

  In addition, a nailing groove 24 having a V-shaped cross section that is continuous along the step width direction (step plate length direction) is formed slightly forward of the upper surface of the base step plate 21 from the base step plate notch recess 22. Yes.

  In the present embodiment, as the material of the base step board 21, a wood-based material can be used. For example, a plywood having a thickness of 12 mm to 30 mm can be suitably used. As a material of the base step board 21 of the present embodiment, a 18 mm thick plywood is adopted.

  As shown in FIG. 1C and FIG. 4, in order to assemble the base plate 21 to the pair of side plates 1 and the like, the base plate 21 is placed in an oblique position so that the rear end faces downward. 21, the rear end insertion portion 23 is made to face the base step board insertion portion 31 of the upper indenting plate 3, and then the base end plate 21 is inserted into the decorative step board insertion portion 31 while the rear end insertion portion 23 is inserted. Rotate to a horizontal position. As a result, the rear end insertion portion 23 of the lower step board 21 is the lower step board of the upper step board 3 in a state where both side edges of the lower step board 21 are along each of the step board attachment mouths 12 of the both side boards 1. It is inserted into the insertion portion 31. In this state, the base plate 21 is fixed to the side plate 1 and the scooping plate 3 by using glue nails. That is, the entire circumference (four surrounding sides) of the front edge, the rear edge, and both side edges on the lower surface side of the base plate 21 and the corresponding upper end surface of the lower indenting plate 3 and upper indented plate 3. An adhesive is applied in such a manner as to be interposed between the base plate insertion portion 31 of the base plate and the top 12 for attaching the plate of the both side plates 1. Further, as shown in FIG. 5, nails 51 such as finish nails are driven into the both side edge portions of the base plate 21 from above and fixed to the top plate 12 of the side plate 1. The nail 51 such as the finish nail is fixed to the upper end surface of the lower indenting plate 3 adjacent to the lower side, and the nail such as the finish nail is obliquely inserted into the nail driving groove 24 in the rear edge portion of the base step board 21 from the front. 51 is driven in and fixed to the base plate insertion portion 31 in the upper indenting plate 3. In this way, the base plate 21 is fixed to the side plate 1 and the rake plate 3 together with glue nails.

  Here, in this embodiment, when the base step plate 21 is inserted into the base step plate insertion portion 31 of the scooping plate 3, the base step plate 21 can be positioned with respect to the side plate 1 and the scooping plate 3. The base step board 21 can be easily and accurately arranged at a predetermined assembly position, and the assembly workability can be improved. In particular, since the depth of the base plate insertion portion 31 is formed deeper than the depth of the decorative step plate insertion portion 35, when the base step plate 21 is inserted into the base step plate insertion portion 31, the upward positioning is also achieved. As a result, assembly workability can be further improved.

  Further, in the present embodiment, as described above, the thickness T1 of the rear end insertion portion 23 of the base step plate 21 is formed slightly larger than the width (gap) W1 of the base step plate insertion portion 31 of the scooping plate 3. Therefore, the rear end insertion portion 23 of the base step plate 21 is inserted into the base step plate insertion portion 31 while being elastically compressed and deformed. For this reason, the base plate 21 can be firmly and stably fitted into the base plate insertion portion 31 of the scooping plate 3 by the restoring force against the above-described compression deformation, and the positional shift of the base plate 21 can be ensured. Can be prevented.

  Further, in this embodiment, since the entire circumference of the four sides of the base step board 21 can be supported and fixed by the side plate 1 and the rake plate 3, the load applied to the base step board 21 can be evenly distributed around the base plate 21 and supported. Thus, the base plate 21 can be reliably assembled in a stable state. In particular, since the rear edge of the base step board 21 can be supported from the lower side by the base step board insertion portion 31 of the upper indenting board 3, the rear end of the base step board 21 when a high load is applied to the base step board 21. It is possible to reliably prevent the occurrence of harmful deflection deformation in which the center of the part sinks.

  As a result, the above-described flexure deformation can be effectively prevented without increasing the strength of the base plate itself, so that a thin and lightweight base plate 21 can be used. Therefore, the material cost can be reduced by reducing the thickness, and the handling work of the base step board 21 can be easily performed by reducing the weight, and as a result, the assembly workability can be further improved.

  In the present embodiment, as described above, the temporary staircase (temporary staircase) in which the base plate 21 is assembled is used as a work staircase for building work, for example, for interior work.

  Here, the base step board insertion part 31 and the decorative step board insertion part 35 of the step board insertion groove 30 formed in the kink plate 3 will be described in detail. In the present embodiment, the base plate insertion portion 31 in the step plate insertion groove 30 is a portion into which the portion constituting the base step plate 21 is actually inserted, in this embodiment, the rear end insertion of the base step plate 21. This is a part corresponding to the part 23. Therefore, in this embodiment, the width W1 of the base step board insertion portion 31 is set based on the thickness T1 of the rear end insertion portion 23 of the base step plate 21, and the width of the base step board insertion portion 31 is set. W1 is not related to the thickness of the main part of the base step board 21 (the thickness of the part on the front side of the rear end insertion part 23 in the base step board 21). As will be described later in the modification, in the base step board 21 in which a notch recess or the like is not formed in the rear edge (see FIG. 10), the base step board insertion portion is based on the thickness of the main part of the base step board 21. A width W1 of 31 is set.

  In addition, the decorative step plate insertion portion 35 of the step plate insertion groove 30 is configured by a portion above the upper surface of the base step plate 21 in the step plate insertion groove 30 in a state where the base step plate 21 is inserted. That is, in this embodiment, the width W2 of the decorative step board insertion portion 35 matches the gap dimension between the upper surface of the base step board 21 and the inner peripheral upper side surface of the step board insertion groove 30. It is set based on the thickness of 25. In addition, even if it is the decorative step board 25 in which the notch recessed part 26 was formed in the rear-end edge so that it may demonstrate in the below-mentioned modification (refer FIG. 10), the width W2 of the decorative step board insertion part 35 is the decorative step board 25. It is not related to the thickness of the rear edge of the rear edge, and is set based on the thickness T2 of the main part of the decorative step board 25.

  On the other hand, as shown in FIG. 6 and FIG. 7, the decorative step board 25 attached to the temporarily assembled staircase after the use as the temporary staircase is finished is attached so as to cover the upper surface of the base step board 21. The nose 4 is formed integrally with the front edge. The nose 4 extends forward from the front end edge of the decorative step board 25 and then is folded downward so that the lower folded portion can cover the front end edge of the base step board 21 from the front.

  As shown in FIG. 8, the thickness T <b> 2 of the decorative step board 25 is the insertion of the decorative step board corresponding to the distance between the upper surface of the base step board 21 and the decorative step board insertion portion 35 of the rake plate 3 as described above. The portion 35 is formed to be slightly larger (thicker) than the width W2. Note that the front end position of the notched concave step portion 22 in the base step plate 21 is disposed further forward than the front surface of the upper indenting plate 3, and therefore the front end position and the upper side of the step plate insertion groove 30 in the indenting plate 3. The gap L between the diagonal gaps formed between the opening edge and the opening edge is formed larger than the thickness T2 of the decorative step board 25.

  In the present embodiment, a wood-based material can be used as the material of the decorative step board 25. For example, PB (particle board) or MDF (medium density fiber board) having a thickness of 6 mm to 18 mm can be suitably used. As a material of the decorative step board 25 of this embodiment, 12 mm thick PB or 9 mm thick MDF is employed.

  As shown in FIG. 1D and FIG. 6, in order to assemble the decorative step board 25 to the pair of side plates 1 and the like, the decorative step board 25 is disposed in an oblique posture with the rear end side facing downward, and the oblique step posture is maintained. The rear edge of the decorative step board 25 is inserted into the front portion of the decorative step board insertion portion 35 in the rake plate 3 through the above-described gap in the oblique direction, and then the decorative step board 25 is pushed backward to become a horizontal posture. Rotate and insert the rear edge of the decorative cardboard 25 to the back of the decorative cardboard insertion part 35. In this inserted state, the decorative corrugated board 25 is disposed so as to cover the upper surface of the base corrugated board 21, and the nose 4 is disposed so as to cover the front end surfaces of the decorative corrugated board 25 and the base corrugated board 21. Thus, makeup is applied to the base corrugated board 21 by the decorative corrugated board 25 with a nose.

  Here, in the present embodiment, the base step plate notch concave step portion 22 is formed at the upper rear end edge of the base step plate 21, and the front end of the notch concave step portion 22 and the upper opening edge portion of the step plate insertion groove 30 are formed. Is formed wider than the thickness T2 of the decorative step board 25, so that the rear edge of the decorative step board 25 in the oblique position is squeezed through the oblique gap. Can be inserted into the decorative corrugated board insertion portion 35 without any hindrance and fitted to the back. That is, the thickness T2 of the decorative step plate 25 is formed to be thicker than the gap dimension W2 between the upper surface of the base step plate 21 and the upper surface (ceiling surface) of the decorative step plate insertion portion 35. In the case where the notched concave step portion 22 is not formed at the rear end portion of the upper surface, the rear edge of the decorative step plate 25 is raked in regardless of whether the decorative step plate 25 is in an oblique posture or a horizontal posture. 3 is difficult to insert into the decorative step board insertion portion 35, and the assembly work of the decorative step board 25 becomes difficult.

  Therefore, in the present embodiment, since the gap L between the diagonal gaps formed above the notched concave step portion 22 of the base step board 21 is larger than the thickness T2 of the decorative step board 25, the diagonal gap is inclined. Thus, the rear edge of the decorative step board 25 can be reliably inserted, and as described above, the decorative step board 25 can be reliably inserted into the interior of the decorative step board insertion portion 35 while rotating. Thus, by arranging the rear end edge of the decorative step board 25 obliquely downward and inserting it into the decorative step board insertion portion 35, the rear end edge of the decorative step board 25 can be smoothly inserted into the decorative step board insertion portion 35. At the same time, the decorative step board 25 can be smoothly inserted to the back of the decorative step board insertion portion 35 by being pushed in while being rotated. Therefore, the decorative plate 25 can be inserted efficiently and smoothly, and as a result, the assembly workability can be further improved.

  Furthermore, in the present embodiment, when the decorative corrugated board 25 is inserted into the decorative corrugated board insertion portion 35, the decorative corrugated board 25 can be positioned with respect to the base corrugated board 21 or the like. Assembling workability can be further improved because it can be easily and accurately arranged at the position.

  Furthermore, in this embodiment, since the thickness T2 of the decorative step board 25 is formed to be thicker than the width W2 of the decorative step board insertion portion 35, the decorative step board 25, the base step board 21, and the dent board 3 The decorative corrugated board 25 is inserted into the decorative corrugated board insertion part 35 while elastically deforming. For this reason, the upper surface of the decorative step plate 25 is brought into close contact with the inner peripheral upper side surface of the step plate insertion groove 30 due to the restoring force against the compression deformation, and between the decorative step plate 25 and the upper opening edge of the step plate insertion groove 30. It is possible to reliably prevent the gap from being formed, and to ensure a good aesthetic appearance.

  In the present embodiment, the decorative corrugated board 25 is fixed to the base corrugated board 21 by using glue nails. That is, as shown in FIG. 7, an adhesive is applied so as to be interposed between the decorative step board 25 and the base step board 21, and in this state, the both sides and the front edge of the decorative step board 25 are finished from above. A nail 55 such as a nail is driven in and fixed to the base plate 21 and the side plate 1.

  In this way, the decorative corrugated board 25 is applied to the base corrugated board 21 to make up, and the curing material such as the curing film attached to the front surface of the scoring board 3 is peeled off to expose the decorative surface of the scoring board 3. Let As a result, the staircase staircase of this embodiment is in a finished state and the stair assembly work is completed.

  As described above, according to the safe construction staircase of the present embodiment, the rear edge of the base step board 21 is inserted and fixed to the base step board insertion portion 31 of the scooping board 3. The rear edge 21 can be supported and fixed from below by the base plate insertion portion 31 of the scooping plate 3. Therefore, it is possible to prevent the bending deformation from occurring in the central portion of the rear end edge of the base step board 21. Furthermore, since the base step plate 21 can be prevented from being bent and deformed, a thin and lightweight base step plate 21 can be used, and cost reduction and assembly workability can be improved.

  Further, in the present embodiment, since the depth of the base stepboard insertion portion 21 of the scooping plate 3 is formed deeper than the depth of the decorative stepboard insertion portion 25, the base stepboard 21 is used as the base stepboard insertion portion 21. When inserted, in addition to positioning in the depth direction and in the downward direction, positioning in the upward direction can be achieved, and the base plate 21 can be easily and accurately attached.

  Moreover, in the safe construction staircase of this embodiment, the assembling work of the scooping board 3, the base stepboard 21, and the decorative stepboard 25 can be performed all from the front side of the staircase including the nailing work. That is, the work from the back side of the stairs is not necessary, and the assembling workability can be further improved.

  Furthermore, since the rear end edge of the decorative step board 25 is inserted into the step plate insertion groove 30 of the upper indenting board 3, the rear end edge of the decorative step board 25 is better fitted, and a good aesthetic is more reliably ensured. Can get to.

  In addition, the thickness T2 of the decorative step board 25 is formed to be thicker than the width W2 of the decorative step board insertion portion 35 provided on the upper side of the step plate insertion groove 30, and the decorative step board 25 is formed in the decorative step plate insertion portion 35. Since it inserts in the compression state, it can prevent that the upper surface of the decorative step board 25 closely_contact | adheres to the upper opening edge part of the step board insertion groove | channel 30, and a clearance gap is formed, and aesthetics can be improved further.

  Furthermore, since the notch concave step portion 22 is formed on the rear edge of the upper surface of the base step plate 21, and the decorative step plate 25 is inserted into the decorative step plate insertion portion 35 using the concave step portion 22, Even if the decorative step plate 25 is thick, it can be reliably inserted into the decorative step plate insertion portion 35.

  Further, since the nosing 4 is integrally formed on the decorative step board 25, the nose 4 can be attached simultaneously with the attachment of the decorative step board 25, and the attaching work of the nosing 4 can be substantially omitted, and the assembling work is further improved. Can be improved.

  In the above embodiment, the case where the present invention is applied to a straight staircase has been described as an example. However, the present invention is not limited thereto, and the present invention is not limited to that. It can be applied in the same manner to the above (including a stepped stairs).

  Moreover, in the said embodiment, although the depth of the base step board insertion part 31 in the dent board 3 is formed deeper than the depth of the decorative step board insertion part 25, it is not restricted only to it, In this invention, it shows in FIG. As described above, the depth of the base plate insertion portion 31 and the depth of the decorative step plate insertion portion 35 may be formed to the same depth. Alternatively, it may be formed shallowly.

  Further, in the above embodiment, the notched concave step portion 22 is formed on the rear end edge of the base step plate 21 so that the rear end edge of the decorative step plate 25 can be smoothly inserted into the decorative step plate insertion portion 35. However, the present invention is not limited to this, and in the present invention, a decorative corrugated plate notch recess 26 may be formed on the rear lower edge of the decorative corrugated plate 25 as shown in FIG. In this case, the thickness of the rear edge of the decorative step board 25 is reduced by forming the decorative step board cutout portion 26, and the thin rear end edge of the decorative step board 25 is made into the step plate insertion groove 30 of the scooping plate 3. The decorative step board 25 can be reliably inserted to the back of the decorative step board insertion portion 35 by inserting the decorative step board 25 while rotating the same as in the above embodiment. Can be plugged in.

  Further, in the present invention, the notch recesses 22 and 26 may be formed on both the lower surface rear edge of the base step plate 21 and the upper surface rear edge of the decorative step plate 25, respectively.

  Further, in the present invention, the decorative step board 25 can be inserted into the decorative step board insertion portion 35 in a compressed state without forming a notch or the like in the base step board 21 or the decorative step board 25. For example, as shown in FIG. 11, the substantial thickness dimension of the decorative step board 25 is formed thinner than the width dimension of the decorative step board insertion portion 35, and the decorative step board 25 is bonded to the base step board 21. As the adhesive 6, a foamable adhesive that foams and expands at the time of curing may be used. In this case, if the decorative corrugated board 25 is inserted into the decorative corrugated board insertion groove 35 before the adhesive 6 is cured, the inserting operation can be performed reliably, and then the adhesive 6 is cured and foamed, whereby the cosmetic corrugated board 25 is cured. The rear end edge of the upper surface of the plate 25 can be pressed against the inner peripheral upper side surface of the step plate insertion groove 30, and a gap is formed between the upper surface of the decorative step plate 25 and the upper opening edge of the step plate insertion groove 30. Can be surely prevented.

  Similarly, when the rear end insertion portion 23 of the base plate 21 is fixed to the inner peripheral lower surface of the step plate insertion groove 30 of the scooping plate 3, if the base plate is bonded with a foaming adhesive, the base plate Even if the thickness T 1 of the rear end insertion portion 23 of the base 21 is thinner than the width W 1 of the base step plate insertion portion 31, the rear end insertion portion 23 of the base step plate 21 becomes the base step plate insertion portion 31. It can be fitted in a compressed state.

  Here, as the foaming adhesive, a one-component urethane adhesive can be exemplified as a suitable one. Note that the adhesive is not limited to foaming, and can be used in the same manner as the above foaming adhesive as long as the adhesive expands (increases in volume) after the base corrugated board 21 and the decorative corrugated board 25 are inserted.

  Moreover, in the said embodiment, the scoring board 3 by which curing materials, such as a curing film, were affixed on the decorative surface was assembled | attached, finally a curing film was peeled off and the decorative surface of the scoring board 3 was exposed. Finishing work is done, but it is not limited to that. In the present invention, a non-makeup rake plate is assembled, and finally a makeup material is pasted on the surface of the rake plate. May be performed.

  Moreover, in the said embodiment, although the rear-end edge of the decorative step board 25 is inserted in the step board insertion groove 30 of the scooping board 3, it is not restricted only to it, In this invention, only the foundation | substrate step board 21 is used. It may be inserted into the step plate insertion groove 30 of the rake plate 3, and the rear end edge of the decorative step plate 25 may be disposed opposite to the front surface of the dent plate 3 without being inserted into the step plate insertion groove 30.

  In the above embodiment, the nosing 4 is formed integrally with the decorative step board 25. However, the present invention is not limited to this, and in the present invention, the nose 4 is formed separately from the decorative step board 25 as shown in FIG. You may make it do. In this case, as shown in the figure, a male ridge portion 27 is formed on the front end surface of the decorative step board 25, and a female ridge portion 41 is formed on the back side of the nose 4 so as to correspond to the male ridge portion 27. By fitting the ridge portion 27 into the female ridge portion 41 and fixing the nosing 4 to the decorative step board 25 or the like, the nosing 4 can be reliably fixed at a predetermined position with high positional accuracy. Needless to say, a male ridge for attaching a nose may be formed on the front end surface of the base plate 21.

  Further, in the above embodiment, for example, when the nose 4 separate from the decorative step board 25 is fixed to the front end surface of the base step board 21, an elastic restoring force is provided in the decorative step board accommodating portion 35 of the scooping board 3. By inserting the cushion material in a compressed state, the decorative step board 25 can be pressed forward by the restoring force of the cushion material and pressed against the nose 5, and the decorative step board 25 can be attached in a stable state. it can.

  Further, in the present invention, as shown in FIG. 13A, a chamfered portion (base step plate side chamfered portion) 29 may be formed on the lower edge portion of the rear end insertion portion 23 of the base step plate 21. In this case, even when the thickness T1 of the rear end insertion portion 23 is thicker than the width W1 of the base step plate insertion portion 31, the base step plate 21 can be easily inserted. Further, as shown in FIG. 13B, even if a chamfered portion (squeezing plate side surface chamfering portion) 39 is formed below the opening edge portion of the step plate insertion groove 30 in the squeezing plate 3, the rear end insertion portion is the same as described above. Even when the thickness T <b> 1 of 23 is thicker than the width W <b> 1 of the base plate insertion portion 31, the base plate 21 can be easily inserted. Needless to say, in the present invention, the base plate side face taking part 29 shown in FIG. 13A and the scooping board side face taking part 39 shown in FIG. 13B may be formed together.

  Further, as shown in FIG. 13B, when the side plate chamfered portion 39 is formed, the base plate 21 can be securely fixed to the bottom plate 3 regardless of the nailing angle. That is, as shown in FIG. 14A, when the side plate chamfer 39 is not formed, when the nail driving angle is high (when the nail driving direction is nearly vertical), the nail 51 driven from the nail driving groove 24 is The nail 51 does not reach into the step plate insertion groove 30, is pulled out below the base step plate 21, is bounced back at the lower side of the step plate insertion groove 30 on the front surface of the plate 3, and is fixed to the plate 3. It may not be possible.

  14B, the nail 51 driven from the nail driving groove 24 is guided to the chamfered portion 39 even when the nail driving angle is high. The nail 51 can be securely fixed to the scooping plate 3.

  For reference, when the nail driving angle is low as shown in FIG. 14C, the nail 51 driven from the nail driving groove 24 remains in the step plate insertion groove 30 even if the side plate chamfer 39 is not formed. Therefore, the nail 51 can be securely fixed to the scooping plate 3.

  The safe construction staircase of the present invention can be applied to, for example, a wooden stairs that are assembled indoors such as a general house.

1: Side plate 12: Cutout for attaching a stepboard (stepboard attachment portion)
13: Diagonal plate attachment clerk (distance plate attachment part)
14: Notch portion for inserting a kick plate 21: Base step plate 22: Base step plate notch concave step portion 25: Makeup step plate 26: Makeup step plate notch concave step portion 27: Male ridge portion 29: Base step plate side chamfer portion 3 : Kake board 30: Corrugated board insertion groove 31: Base board board insertion part 35: Makeup board board insertion part 39: Kake board side surface taking part 4: Nose 41: Female ridge part 6: Adhesive T1: After the base board board End thickness T2: thickness of decorative step board W1: width of base plate insertion portion W2: width of base plate insertion portion

Claims (18)

Provided with a plurality of base plate arranged at intervals in the diagonal direction, the upper end of the squeeze plate arranged between the adjacent base plate is arranged corresponding to the front lower surface of the upper base plate In addition to the temporary state in which the lower end of the front surface of the dent plate is disposed corresponding to the rear end of the lower base plate, a decorative step plate is attached to the upper surface of the base plate and finished. Safe construction stairs
A step plate insertion groove corresponding to the rear end of the base step plate is formed in the front lower end portion of the scraping plate, and the rear end of the base step plate is inserted into the step plate insertion groove. Safe construction stairs characterized by being arranged. The lower side of the step plate insertion groove is configured as a base step plate insertion portion for inserting the base step plate,
A gap between the upper surface of the base plate in the step plate insertion groove and the inner peripheral upper side surface of the step plate insertion groove is configured as a decorative step plate insertion portion,
The safe construction staircase according to claim 1, wherein in a finished state, the rear end of the decorative step board is disposed in a state of being inserted into the decorative step board insertion portion.   The safety construction step according to claim 2, wherein the upper rear end of the decorative step board is arranged in pressure contact with the inner peripheral upper side surface of the step board insertion groove.   The thickness of the said decorative step board is formed thicker than the said decorative step board insertion part, and the rear end of the said decorative step board is inserted in the state compressed in the decorative step board insertion part. Safe construction stairs.   When the adhesive interposed between the base plate and the decorative plate expands, the top rear end of the decorative plate is pressed against the inner peripheral upper surface of the plate insertion groove. The safe construction stair according to any one of claims 2 to 4. A base step plate notch recess is formed at the rear end of the upper surface of the base step plate,
The safety construction stair according to any one of claims 2 to 5, wherein a front end position of the base plate notch recess is disposed in front of a front surface of the upper indenting plate.   The safety construction according to any one of claims 2 to 6, wherein a rear edge of the decorative step board is formed thin by forming a notch recess in the lower face of the lower surface of the decorative step board. Stairs.   The safety construction stair according to any one of claims 2 to 7, wherein a depth of the base step board insertion portion is formed deeper than a depth of the decorative step board insertion portion.   The thickness of the said base step board is formed more thickly than the said base step board insertion part, and it is inserted in the state which the rear end of the said base step board compressed to the base step board insertion part. Safety construction staircase according to item 1.   The safety construction step according to any one of claims 1 to 9, wherein a base step plate side surface chamfering portion is formed at a lower edge portion of a rear end surface of the base step plate.   The safety construction staircase according to any one of claims 1 to 10, wherein a side plate chamfering portion is formed below an opening edge portion of a step plate insertion groove in the stepping plate. In the temporary state, a peelable curing material is laminated on the front surface of the rake plate,
The safe construction stair according to any one of claims 1 to 11, wherein in the finished state, the curing material is removed from the rake plate. A decorative board decorative material that can be attached to the front surface of the electronic board is provided,
The said board is a state in which the said board decoration material was removed in the temporary state, and the board decoration material is affixed on the said board in the finishing state. Safe construction stairs as described in the section.   The safe construction stair according to any one of claims 1 to 13, wherein a step nose is provided to cover a front end portion of the base plate and the decorative plate.   The safe construction staircase according to claim 14, wherein the stair nosing is formed integrally with the decorative step board. A male ridge is formed on the front end surface of the decorative corrugated board, and a female ridge is formed on the back side of the nose,
The safety construction staircase according to claim 14, wherein the male ridge portion is fitted into the female ridge portion, and the nose is attached to the decorative step board.   A cushion material that is compressed and deformed by the decorative step plate is disposed in the decorative step plate insertion portion for inserting the decorative step plate in the step plate insertion groove, and the decorative step plate is pushed forward by the restoring force of the cushion material. The safety construction staircase according to claim 16, wherein a front end of the decorative step board is configured to be in pressure contact with the step nose. A side plate supporting the side edge of the base plate and the side edge of the rake plate;
On the upper edge of the side plate, horizontal step plate mounting portions that support the lower surfaces of both sides of the base step plate, and vertical scoop plate mounting portions that support the bottom ends of both sides of the scoring plate are alternately provided,
The safety plate according to any one of claims 1 to 17, wherein a notch portion for inserting a dent plate for inserting and arranging a lower end of the dent plate is formed at a rear end of the step plate attachment portion of the side plate. Construction stairs.

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