JP4319951B2 - Construction method for houses with strip stairs - Google Patents

Description

  The present invention relates to a method for constructing a house having strip stairs.

  A strip staircase is known as an indoor staircase in a house. The strip staircase includes, for example, a saddle girder installed diagonally across the upper and lower floors, a step plate support portion provided at a predetermined interval in the longitudinal direction of the saddle girder, and a plurality of steps supported by the step plate support portion. (For example, refer to Patent Document 1).

  Such a strip staircase has been increasing in demand recently because it improves the appearance of the living room and is excellent in ventilation and lighting.

  By the way, when constructing a two-story or more house, if this strip staircase is installed at the time of construction and is used for raising and lowering between the upper and lower floors at the time of construction, there is a problem that the strip staircase is damaged.

Therefore, there has been a method in which a temporary staircase is installed between the upper floor and the lower floor, the temporary staircase is removed after the housing is constructed, and a strip staircase, which is the main staircase, is installed in the interior work or the like.
Japanese Patent Laid-Open No. 11-303216

  However, in the construction method using the temporary staircase, both the temporary staircase and the main staircase are manufactured and packed in the factory, transported to the construction site, and then the temporary staircase is installed and used in the construction work. Since the temporary staircase is removed after the construction, and the main staircase is installed in the interior work or the like, there are problems that work efficiency is poor and the number of members is large.

  The subject of this invention is aiming at simplification of construction in the construction method of the house which has a strip staircase.

In order to solve the above-mentioned problem, for example, as shown in FIGS. 1 to 9, the invention described in claim 1 includes a saddle girder 2 installed diagonally across the upper and lower floors, and a predetermined length in the longitudinal direction of the sagging girder 2. In a construction method of a house having a strip staircase 1 having a plurality of step plate support portions 3 provided at intervals and a plurality of step plates 4 supported by the step plate support portion 3,
A first step of fixing the upper end and the lower end of the sheathing girder 2 that is still covered with the protective cover 24 that protects the sheathing girder 2 from impact from the outside, at the upper and lower floor mounting positions;
A second step of attaching the temporary corrugated plate 7 to the corrugated plate supporting portion 3 of the sheath beam 2 that is still covered with the protective cover 24 ,
The protective cover 24 has a plurality of holes 24a through which the step plate support 3 of the spar 2 is inserted, and when the spar 2 is covered with the protective cover 24, the step plate support 3 is inserted into the hole 24a. It is characterized by that.

Further, in order to solve the above-mentioned problem, the invention described in claim 2 includes a saddle girder 2 installed obliquely across the upper and lower floors, and a plurality of step plates provided at predetermined intervals in the longitudinal direction of the saddle girder 2. In a construction method of a house having a strip staircase 1 including a support portion 3 and a plurality of step plates 4 supported by the step plate support portion 3,
A first step of fixing the upper end and the lower end of the sheathing girder 2 that is still covered with the protective cover 24 that protects the sheathing girder 2 from impact from the outside, at the upper and lower floor mounting positions;
A second step of attaching the temporary corrugated plate 7 to the corrugated plate supporting portion 3 of the sheath beam 2 that is still covered with the protective cover 24,
Sasara girders 2 consist of an inner girder member 21 and an outer girder member 22 bonded together.
The lowermost step plate support 3 is provided on the inner girder member 21, provided on the outer girder member 22 with a protruding portion 21 </ b> B protruding upward from the upper inclined surface 2 a of the spar 2, and on the inclined surface 2 a. And a notch 22E that is notched downward is formed,
In the first step, a screw is vertically driven from the notch 22E to the floor surface A,
Furthermore, the girder 2 and the floor are fixed.

  Invention of Claim 3 is after the 2nd process in the construction method of Claim 1 or 2, Comprising: After completion | finish of construction of a building frame, the temporary step board 7 is removed and the protective cover 24 is removed. It is characterized by comprising a third step of attaching the permanent plate (step plate 4) to the step plate support part 3 of the sasara girder 2.

  The invention described in claim 4 includes a fourth step of covering the step plate support portion 3 with the step plate support portion cover 25 after the third step in the construction method according to claim 3.

According to the first aspect of the present invention, since the spar 2 is installed in a state protected by the protective cover 24, it can be used at the construction site without damaging the spar 2, so Girder 2 can be used as an additional girder for the temporary staircase.
Accordingly, since no extra girder for the temporary staircase is required, the working efficiency is good and the number of members can be reduced.
In particular, since the protective cover 24 has a plurality of holes 24 a through which the step plate support portion 3 of the further beam 2 is inserted, the temporary step plate 7 can be easily attached to the step plate support portion 3.

According to the second aspect of the present invention, since the spar 2 is installed in a state protected by the protective cover 24, it can be used at the construction site without damaging the spar 2, so Girder 2 can be used as an additional girder for the temporary staircase.
Accordingly, since no extra girder for the temporary staircase is required, the working efficiency is good and the number of members can be reduced.
Furthermore, by driving the screw vertically into the floor surface A from the notch 22E, it is possible to fix the spar 2 and the floor, so that only the lowermost step board support 3 is exposed from the protective cover 24, The spar 2 can be easily fixed to the floor surface A while being covered with the protective cover 24.

  According to the third aspect of the present invention, it is of course possible to obtain the same effect as that of the first or second aspect of the invention. The temporary girder 7 is removed and the protective cover 24 is removed. Since the step of attaching the permanent plate (step plate 4) to the step plate support 3 is included, damage during construction of the permanent plate (step 4) can be prevented. It can be used as a temporary step board for temporary stairs in other construction work.

  According to the invention described in claim 4, it is of course possible to obtain the same effect as that of the invention described in claim 3. In particular, after the stepped plate (step plate 4) is attached, the step plate support is provided. Since the step 3 is covered with the step plate support portion cover 25, even if the step plate support portion 3 of the spar 2 is damaged at the time of construction, the step plate support portion cover 25 can be covered to hide the damage. The appearance of the stairs 1 can be kept good.

  Hereinafter, with reference to drawings, the embodiment of the construction method of the house which has strip staircase 1 concerning the present invention is described in detail.

(Strip staircase structure)
As shown in FIG. 1, the strip staircase 1 according to the present embodiment is provided with a saddle girder 2 that is temporarily installed across the upper and lower floors, and is provided at a predetermined interval in the longitudinal direction of the sagging girder 2. And a plurality of step plates 4 (mainly provided step plates) respectively supported by the step plate support portions 3.

  As shown in FIG. 1, the right and left two horizontal beams 2 are used for the vertical beam 2 in the ascending direction, and a plurality of step plate support portions 3 are provided on the upper inclined surface 2 a. ing.

  Note that the two right and left spar girders 2 are formed in the right and left direction and are substantially the same in configuration, so the details will be described below with the right side spar 2.

  As shown in FIG. 2, the sheath girder 2 is formed by covering a plywood obtained by bonding the inner girder member 21 and the outer girder member 22 with a sheath girder cover 23 (see FIG. 5) that is an exterior member.

As shown in FIG. 2, each inner girder member 21 includes a main body portion 21A and a plurality of projecting portions 21B that are formed integrally with the main body portion 21A and project from the main body portion 21A. The main body portion 21A and the protruding portion 21B are formed by, for example, integrally cutting out a plywood having a predetermined thickness by machining for machining by NC (Numerical Control) control or the like.
The protruding portion 21B protrudes from the upper inclined surface 2a of the main body portion 21A in a substantially triangular shape at a predetermined interval in the longitudinal direction.

  Further, an attachment portion 21C is formed at the upper end portion of the inner girder member 21, and this attachment portion 21C is attached to the upper receiving body 5 provided on the upper floor as shown in FIG. Yes. Further, an engagement groove 21D is formed at the lower end portion of the inner girder member 21, and the engagement groove 21D can be fitted with the lower receiving material 6 provided on the floor of the lower floor. The attaching portion 21C and the engaging groove 21D are also formed by being cut out integrally by machining such as NC machining when the main body portion 21A and the protruding portion 21B are formed.

  The outer girder member 22 has substantially the same shape as the inner girder member 21, and has a main body portion 22A, a protruding portion 22B, a mounting portion 22C, and an engaging groove 22D, as shown in FIG. These parts are integrally cut out by machining such as NC machining in the same manner as the inner girder member 21.

  When the inner girder member 21 and the outer girder member 22 are bonded together, the upper surface of the protruding portion 21B is higher than the upper surface of the protruding portion 22B, and the protruding portion 21B and the protruding portion 22B are integrated. Thereby, the corrugated board support part 3 is formed.

  As shown in FIG. 2, the upper surfaces of the protruding portion 21 </ b> B and the protruding portion 22 </ b> B are formed to be horizontal when the spar 2 is attached to the building frame. Further, the corrugated plate support portion 3 includes a groove 31 formed by a difference in height between the upper surfaces of the protruding portion 21B and the protruding portion 22B.

  In the present embodiment, the case where the upper surface of the protruding portion 21B is higher than the upper surface of 22B is shown, but the upper surface of the protruding portion 21B may be lower than the upper surface of the protruding portion 22B.

  Further, when the inner girder member 21 and the outer girder member 22 are bonded together, the attachment portion 21C and the attachment portion 22C are integrated, so that the upper receiver 5 provided on the upper floor shown in FIG. A fitting portion 2b that fits into the fitted portion 5a is formed. Further, by integrating the engaging groove 21D and the engaging groove 22D, a concave portion 2c that can accommodate the receiving material 6 for positioning the girder of the lower floor shown in FIG. 3 is formed.

  As shown in FIG. 3, the lower receiving material 6 is provided in advance on the floor A of the lower floor at a position where the spar 2 is to be installed.

  Further, the lowermost step plate support portion 3 is formed only from the protruding portion 21B of the inner girder member 21, and a portion corresponding to the lowermost protruding portion 22B of the outer girder member 22 is cut downward from the inclined surface 2a. A notched portion 22E is provided. Therefore, as shown in FIG. 4, the outer girder member 22 is designed to be fixed by driving a screw vertically from the notch 22 </ b> E of the outer girder member 22 into the lower support member 6.

  The sheath girder cover 23 is formed by, for example, a developed structure as shown in FIG. 5A, and a plurality of hole portions 23 a through which the step plate support portion 3 can be inserted are formed on the surface of the sheath girder cover 23. Is provided. The sasara cover 23 is made of synthetic resin, for example, Ws (woody series) olefin plywood, which is a composite plywood formed by bonding an olefin sheet to the plywood. Further, as shown in FIG. 5 (b), the folding part 23D of the sheathing girder cover 23 is provided on both sides of the folding line 23M and from one side in the thickness direction while leaving a predetermined thickness on the folding part 23D. A V-cut portion 23K cut at an angle of α °, for example, 45 ° toward the other side is formed. Therefore, when the spar girder cover 23 is folded, the notch portions 23K on both sides sandwiching the fold line 23M come into contact with each other, so that even if the spar girder cover 23 has a slight thickness 23t, it can be easily and accurately. Can be folded.

  When the spar girder cover 23 is bent at the folding portion 23D, the shape shown in FIG. When the step board support 3 of the spar 2 is inserted through the hole 23a of the spar cover 23 and the seam 23b and the seam 23c are aligned, the plywood made up of the inner spar member 21 and the outer spar member 22 is covered. Further, as shown in the AA cross-sectional view of FIG. 8 shown in FIG. 6B, the seams 23b and 23c when the sheath beam 2 is covered are directed between the right and left cage beams 2 and cannot be seen. It has become.

Further, all the visible portions such as each step plate support portion 3 and each step plate 4 are covered with a step plate support portion cover 25 which is an exterior member formed of _WS olefin plywood.

  For example, as shown in FIG. 8, the step plate support portion cover 25 is formed so as to be able to cover a visible portion between the spar 2 and the step plate 4.

  Further, the sword 2 is covered with a protective cover 24 that protects the sword 2 from external impacts, is transported from the factory, and is installed and cured while being covered with the protective cover 24.

The protective cover 24 is formed by, for example, an unfolded structure as shown in FIG. 7A, and covers the spar 2 as shown in the BB cross-sectional view of FIG. 9 shown in FIG. 7B. It is configured. The protective cover 24 is formed of a cushioning material such as a corrugated cardboard, an air sheet, an elastic material such as rubber or urethane, or a foamable material such as polystyrene foam.
On the surface of the protective cover 24, a plurality of holes 24a through which the step plate support 3 can be inserted are provided.

  When the protective cover 24 is made of a material that is hard to some extent, as shown in FIG. 7C, the folded portion 24D of the protective cover 24 is disposed on both sides of the folding line 24M, and the folded portion 24D. A configuration may be provided in which a V-cut portion 24K cut at an angle of α °, for example, 45 °, is formed from one side in the thickness direction to the other side while leaving a predetermined thickness. By adopting such a configuration, when the protective cover 24 is bent, the cutout portions 24K on both sides sandwiching the fold line 24M come into contact with each other, so that the protective cover 24 has a certain thickness t and a certain degree of hardness. Even if it exists, the protective cover 24 can be bent easily and accurately. The protective cover 24 covers the spar 2 in the same manner as the spar cover 23.

  Further, as shown in FIG. 7A, the protective cover 24 has a marginal portion 24b. By overlapping the marginal portion 24b with the other protective cover 24, the length of the protective cover 24 can be reduced to that of the further girder 2. Can be extended to length.

  As shown in FIG. 8, the step plate 4 is provided with two step plate notches 41 at the center of the lower surface on the side of the saddle beam 2. In a state where the step plate 4 is attached to the sheathing beam 2, each step plate notch 41 is engaged with the sheathing beam 2.

  The upper surface 41a of the step plate notch 41 is inclined in the same manner as the inclined surface 2a of the saddle girder 2 attached to the building frame. It is provided so as to come into contact with the inclined surface 2 a of the beam 2.

  The length between both side surfaces 41 b of the step plate notch 41 is equal to the width of the spar 2, and the side surfaces 41 b of the step plate notch 41 are in a state where the step slash 41 is engaged with the spar 2. It is provided so as to come into contact with the side surface of the spar 2.

  Furthermore, a substantially rectangular parallelepiped attachment member 42 that is long in the front-rear direction of the step plate 4 is provided on the lower surface inside the width direction of the step plate 4 with respect to the step plate notch 41. The width of the attachment member 42 is substantially equal to the width of the groove 31 generated by the difference in height between the upper surfaces of the protrusion 21B and the protrusion 22B, and the attachment member 42 is engaged with the groove 31. By engaging the attachment member 42 long in the front-rear direction with the groove 31 long in the front-rear direction, the position and angle of the step plate 4 in the lateral direction with respect to the spar 2 are determined.

  The length and height of the attachment member 42 are preferably approximately the same as the groove 31. If the length and height of the attachment member 42 are approximately the same as those of the groove 31, there are few gaps left after the step plate 4 is attached to the spar 2 and the contact area is increased. For this reason, when an adhesive is used to fix the step plate 4 and the spar 2, the bonding area can be increased. Further, the position of the attachment member 42 is set in accordance with the position of the groove 31 of the corrugated board support 3.

  The step plate 4 can also be formed integrally with the attachment member 42 using an NC-controlled milling cutter or the like. The attachment member 42 may be attached to the corrugated board 4 with a wooden screw or the like.

  In addition, although the step board 4 is described in the rectangular parallelepiped shape in drawing, if it is flat shape, it can be set as arbitrary shapes, such as circular and an ellipse.

(Temporary corrugated board)
The temporary step plate 7 is, for example, a rectangular parallelepiped flat plate. For example, as shown in FIG. 9, the temporary step plate 7 is attached to the step plate support portion 3 of the further beam 2 by screws or the like.
The plate width of the temporary plate 7 is such that the gap between the nearest wall surface B (see FIG. 1) with respect to the strip staircase 1 and the end of the temporary plate 7 becomes wide. It may be configured with a shorter dimension closer to the center in the width direction.

(Construction method)
Next, the construction method of the house which has the strip staircase 1 of the above structures is demonstrated.

First, in the factory, the spar 2 is covered with the protective cover 24 (covering step). In this covering step, the corrugated plate support 3 is inserted into the hole 24 a provided in the protective cover 24.
Next, the spar 2 with the protective cover 24 covered is attached to the building frame as shown in FIG. 3 (first step).

  Specifically, in the first step, the upper end of the spar 2 is fixed by fitting the fitting portion 2b to the fitted portion 5a of the upper receiving body 5 provided on the upper floor. The fitting portion 2b is fixed to the fitted portion 5a, for example, as shown in FIG.

On the other hand, the lower end of the spar girder 2 fits and fixes the recessed part 2c to the lower receiving material 6 previously installed in the floor surface A of the lower floor.
More specifically, for example, as shown in FIG. 4, the outer girder member 22 and the lower receiving member 6 positioned on the lowermost step plate support portion 3 are fixed with a plurality of screws, thereby the sheath girder 2 is fixed to the floor. Fix to surface A.

  Next, for example, as shown in FIG. 9, the temporary step plate 7 is attached to the step plate support portion 3 of the spar 2 with screws or the like (second step). In this way, a temporary staircase is provided that includes the above-described temporary step plate 7 and the protective girder 2 that is still covered with the protective cover 24.

  Next, after the completion of various construction work, in the interior work, the temporary step board 7 is removed from the sheathing girder 2, the protective cover 24 is removed from the sheathing girder 2, and the step board 4 is attached to the stepboard supporting part 3 (third Process). This temporary step board 7 can be reused as a temporary step board 7 for a temporary staircase in another construction work.

Specifically, the attachment of the corrugated plate 4 to the corrugated plate support 3 in the third step is first performed in the groove 31 of the corrugated plate support 3 of the spar 2 as shown in FIG. Engage. As a result, the lateral position and angle of the step plate 4 with respect to the spar 2 are determined, and the lower surface of the step plate 4 and the upper surface of the step plate support portion 3 come into contact with each other, so that the vertical position is determined. Become.
Next, when the upper surface 41a of the step plate 4 is brought into contact with the inclined surface 2a of the sheathing girder 2, the front-rear position of the step plate 4 with respect to the sheathing girder 2 is determined.

  When the position of the step plate 4 is determined, the sheath beam 2 and the step plate 4 are fixed with screws or the like. In addition, you may use an adhesive agent together when fixing. The remaining step plates 4 are fixed to the spar 2 in the same manner.

  Finally, the corrugated board support part cover 25 is attached to the corrugated board support part 3 (4th process).

According to the construction method of the house having the strip staircase 1 according to the present embodiment, since the spar 2 is installed in a state protected by the protective cover 24, it can be used at the construction site without damaging the spar 2. Thus, the sagging girder 2 of the main stairs can be used as the sagittal girder of the temporary stairs.
Accordingly, since no extra girder for the temporary staircase is required, the working efficiency is good and the number of members can be reduced.
Further, when the plate width of the temporary step plate 7 is configured to be shorter than the plate width of the step plate 4 toward the center in the width direction, the nearest wall surface B (see FIG. 1) and the temporary step plate 7 with respect to the strip staircase 1. Since the gap with the end of the wall becomes wider, it is possible to easily attach the fire-resistant gypsum board or wallpaper to the wall surface B without removing the temporary step board 7 from the spar 2.

  Further, since the protective cover 24 has a plurality of holes 24 a through which the step plate support portion 3 of the spar 2 is inserted, the temporary step plate 7 can be easily attached to the step plate support portion 3.

  In addition, in the interior work after the construction work of the building frame is completed, the temporary step board 7 is removed, the protective cover 24 is removed, and the step board 4 is attached to the step board support portion 3 of the sagittal girder 2. Damage during construction can be prevented, and the temporary step board 7 can be reused as a temporary step board for a temporary stair in another construction work.

  In addition, since the step plate support portion 3 is covered with the step plate support portion cover 25 after the step plate 4 is attached, the step plate support portion cover 25 is covered even if the step plate support portion 3 of the quick girder 2 is damaged during construction. Therefore, it is possible to conceal the scratches, and it is possible to keep the appearance of the strip staircase 1 good.

  Further, by driving the screw vertically into the floor surface A from the notch 22E, it is possible to fix the spar 2 and the floor, so that only the lowermost stepboard support 3 is exposed from the protective cover 24, The spar 2 can be easily fixed to the floor surface A while being covered with the protective cover 24.

In the present embodiment, the case where the protective girder 2 is covered with the protective cover 24 at the factory has been shown, but the protective girder 2 may be covered with the protective cover 24 at the construction site.
In addition, the hole 24 a may not be provided in the protective cover 24. In that case, for example, the temporary step plate 7 may be attached by cutting through the protective cover 24 of the step plate support portion 3.
Further, the temporary step board 7 may be attached from above the protective cover 24. In this case, the corrugated plate support portion 3 is not damaged, so that the corrugated plate support portion cover 25 is not necessary.

It is a perspective view of the main part of the living room after strip staircase installation concerning the present invention. It is a perspective view which shows the inner side girder member and outer side girder member which comprise a spar. It is a side view after strip staircase installation concerning the present invention. It is a disassembled perspective view for demonstrating the attachment process to the floor surface of a sasara girder. It is the expanded view (a) of a sagittal girder cover, and sectional drawing (b) which shows the folding part of a sagittal girder cover. FIGS. 9A and 9B are an exploded perspective view (a) and a cross-sectional view (A) of FIG. FIG. 10A is a development view of the protective cover, FIG. 9B is a cross-sectional view taken along the line B-B, and FIG. 10C is a cross-sectional view showing a folded portion of the protective cover. It is a disassembled perspective view for demonstrating the attachment process to the sagging girder of a step board. It is a disassembled perspective view for demonstrating the attachment process to the further arrangement | positioning of a temporary step board.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Strip stairs 2 Sasara girder 2a Inclined surface 21 Inner girder member 21A Main-body part 21B Protrusion part 22 Outer girder member 22E Notch part 23 Sasara girder cover 24 Protective cover 24a Hole part 25 Step board support part cover 3 Step board support part 4 (Main board)
7 Temporary corrugated board A Floor B Wall

Claims (4)

A vertical girder installed diagonally across the upper and lower floors, a plurality of step plate support portions provided at a predetermined interval in the longitudinal direction of the vertical beam, and a plurality of step plates supported by the step plate support portion In the construction method of the house having the strip stairs provided,
A first step of fixing an upper end and a lower end of the sheathing girder that is still covered with a protective cover that protects the sheathing girder from an impact from outside;
A second step of attaching a temporary corrugated board to the corrugated board support portion of the sagittal girder that is still covered with the protective cover ,
The protective cover has a plurality of holes that pass through the step plate support of the spar girder,
When the sheathing girder is covered with the protective cover, the corrugated plate support portion is inserted into the hole portion.
Construction method of the house with a strip stairs, characterized in that that. A vertical girder installed diagonally across the upper and lower floors, a plurality of step plate support portions provided at a predetermined interval in the longitudinal direction of the vertical beam, and a plurality of step plates supported by the step plate support portion In the construction method of the house having the strip stairs provided,
A first step of fixing an upper end and a lower end of the sheathing girder that is still covered with a protective cover that protects the sheathing girder from an impact from outside;
A second step of attaching a temporary corrugated board to the corrugated board support portion of the sagittal girder that is still covered with the protective cover ,
The sasara girder consists of an inner girder member and an outer girder member bonded together,
The lowermost step plate support portion is provided on the inner girder member, and is provided on the outer girder member with a protruding portion that protrudes upward from the inclined surface on the upper side of the counter girder. A notch cut out downward is formed,
In the first step, the method for constructing a house having a strip staircase, characterized in that, by driving a screw vertically from the notch to the floor surface, the spar and the floor are fixed .   After the second step, after the construction work of the building frame is completed, the temporary step plate is removed, and the third step is performed to attach the permanent step plate to the step plate support portion of the further girder from which the protective cover is removed. The construction method of the house which has strip stairs of Claim 1 or 2 characterized by the above-mentioned.   4. The method for constructing a house having strip stairs according to claim 3, further comprising a fourth step of covering the step plate support portion with a step plate support portion cover after the third step.

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