JP2014066077A - Open string fixture, mounting structure of staircase employing the fixture and construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To implement a staircase construction in which an upper end of an open string is firmly fixed to a building frame even in the case where a lathing material is interposed, and carpentry work is prevented from being performed over again.SOLUTION: A fixture 10 for fixing an upper end of an open string 23 of a staircase to a building frame 25 over a lathing material 26 comprises: a main body 13 of which the cross section is substantially U-shaped, including a wall surface fixing plate 11 and a pair of open string side face fixing plates 12a, 12b erected from one side of the wall surface fixing plate; a hollow tubular protrusion 14 protruding from the other side of the wall surface fixing plate; and machine screw holes 16a, 16b formed in the open string side face fixing plates. The hollow tubular protrusion is fitted into a protrusion accommodation hole 28 which is formed through the lathing material in a thickness direction, the fixture is fixed to a wall by driving a machine screw 27 through the hollow tubular protrusion to the building frame while bringing the wall surface fixing plate into contact with a wall surface, and the open string is fixed to the fixture by driving machine screws 29 through the machine screw holes to an open string side face while holding the upper end of the open string between the open string side face fixing plates.

Description

The present invention relates to a fixing bracket for fixing the upper end of a spar girder to a wall surface, a staircase mounting structure using the fixing bracket, and a construction method.

As a kind of staircase to be constructed in a building such as a house, a pair of right and left saddle girders provided in a skewed manner between the floor and the wall is omitted, and a plurality of treads installed above these girders There are some things (called open stairs). Such stairs give a simple and modern impression, and there is an increasing demand for such a design and interior that matches an open living room with an open space. An example of the prior art of this type of staircase is shown in Patent Document 1, and both a flat base plate and a metal fitting for fixing the lower end of the spar girder to the floor and a metal fitting for fixing the upper end to the wall, A pair of left and right holding plates raised vertically from the base plate is used, and the base plate is attached to the floor or wall surface with screws or the like, and the lower end or upper end of the spar is placed between the pair of holding plates. By attaching with a screw etc. with the pinch in between, the sashing girder is fixed.

JP 2006-249752 A

For floors to which the lower ends of the spar girders are fixed, wooden materials such as plywood are generally used as the base material, so screws using the metal fittings and other metal fittings (such as L metal fittings) used in Patent Document 1 are used. For example, it can be firmly fixed. However, for the walls where the upper ends of the spar girders are fixed, the base material such as gypsum board is generally applied to the structural frame such as pillars and beams, and then the cross-stretching finish is performed. Will not be firmly fixed. For this reason, construction cannot be performed in a stable state with the upper end of the spar girder closely attached to the wall surface, and a gap may be formed between the wall surface and the appearance may be deteriorated, or stairs may be staggered. It was.

In addition, when constructing a staircase as shown in Patent Document 1, conventionally, a carpenter fixes a girder girder to a wall structure frame, attaches a step board other than the top step board, and then attaches a gypsum board to the frame Then, the interior contractor applied the cloth on the surface of the plasterboard, and then the carpenter re-installed the top tread in the order of work. This is because when the uppermost tread is installed, there is only a gap of about 5 mm between the side of the uppermost tread and the surface of the gypsum board. It was to be impossible. For this reason, it was necessary for the carpenter to come back to the site after attaching the cloth and perform the work of attaching the uppermost tread, which was troublesome twice.

Accordingly, the problem to be solved by the present invention is to provide a fixing metal fitting that can be firmly fixed to a frame even when a wall base material such as a gypsum board is interposed when fixing the upper end of the spar girder to the wall. And it is providing the construction structure and construction method of the staircase which can be easily constructed using this fixed metal fitting together.

In order to solve this problem, the present invention according to claim 1 is a fixing metal fitting for fixing the upper end of a stair-picking girder to a wall structure frame through a wall base material, and comprising a wall fixing plate and the wall fixing A body having a substantially U-shaped cross-section having a pair of spar girder side fixing plates erected from one surface of the plate, a hollow cylindrical projection projecting from the other side of the wall surface fixing plate, and a spar girder side surface fixing It has a screw girder for fixing the side face of the girder formed on the plate.

According to a second aspect of the present invention, in the fixing bracket according to the first aspect, the hollow cylindrical protrusion has a protruding length substantially the same as or slightly shorter than the thickness of the wall base material.

According to a third aspect of the present invention, in the fixing bracket according to the first or second aspect, a guide edge that is inclined downward from the front end side toward the wall surface fixing plate side is provided on the upper edge or the front edge of the cage girder side surface fixing plate. And a pin projecting outward from the side surface of the girder can be placed on the guide edge.

According to a fourth aspect of the present invention, in the fixing bracket according to the third aspect, a recess capable of accommodating the pin is provided at the end of the guide edge.

According to a fifth aspect of the present invention, there is provided a staircase mounting structure using the fixing metal fitting according to any one of the first to fourth aspects, wherein a hollow cylinder is formed in a projection receiving hole formed through the thickness of a wall base material. The fitting is fixed to the wall by inserting the wall-shaped protrusion, placing the wall-fixing plate in contact with the wall surface, and driving the wall-fixing screw through the hollow cylindrical protrusion into the housing. It is characterized in that the spar girder is fixed to the fixing bracket by inserting the spar girder side fixing screw through the spar girder side fixing screw hole and driving it into the side of the spar girder while being sandwiched between the spar girder side fixing plates. .

According to a sixth aspect of the present invention, there is provided a method for constructing a staircase using the fixing bracket according to any one of the first to fourth aspects, wherein the projection receiving hole is formed through the thickness of the base material of the wall surface. Insert the hollow cylindrical protrusion, keep the wall fixing plate in contact with the wall surface, pass the wall fixing screw through the hollow cylindrical protrusion, and fix it to the wall to fix the fixing bracket to the wall. It is characterized by fixing the shearing girder to the fixing bracket by inserting the screw for fixing the side of the girder side through the screw hole for fixing the side surface of the girder and driving it into the side of the girder girder while being sandwiched between the pair of side girder fixing plates. .

According to the first aspect of the present invention, the hollow cylindrical protrusion is inserted into the protrusion receiving hole formed through the thickness of the base material of the wall surface, and the wall surface fixing plate is brought into contact with the wall surface to fix the wall surface. The fixing bracket is fixed to the wall by driving the screw into the housing through the hollow cylindrical projection. The spar is fixed to the fixing bracket by driving through the screw hole and into the side of the spar. Therefore, when fixing the fixing bracket to the wall, the screw is not driven into a wall base material such as a gypsum board as in the prior art, but is driven into a solid through a hollow cylindrical projection having a strength higher than that of the wall base material. Therefore, the upper end of the spar can be firmly fixed to the wall via the fixing bracket.

According to the second aspect of the present invention, since the projecting length of the hollow cylindrical projection is set to be approximately the same as or slightly shorter than the thickness of the wall base material, the wall fixing screw is passed through the hollow cylindrical projection. Since the wall fixing plate is in close contact with the wall surface when it is driven into the wall, the fixing strength of the fixing bracket to the wall is further increased, and the upper end of the spar is secured to the wall more securely and stably via this fixing bracket. can do.

According to the third aspect of the present invention, when the spar is applied to the fixing bracket fixed to the wall, the pin projecting outward from the side of the spar is placed on the guide edge of the pin placement part, and the guide By moving along the edge, the upper end of the spar can be pulled toward the wall surface, and the construction becomes easy.

According to the fourth aspect of the present invention, the pin that has moved along the guide groove is accommodated in the recess, so that it is possible to easily position the upper end of the spar with respect to the wall.

According to the fifth aspect of the present invention, when the fixing fitting is fixed to the wall, the screw is not driven into a wall base material such as a gypsum board as in the prior art, and has a higher strength than the wall base material. Since it is driven into the solid via the projection, the upper end of the spar can be firmly fixed to the wall via the fixing bracket. Therefore, it is possible to increase the fixing strength in the mounting structure of the sagittal girder staircase, and to prevent problems such as wobbling of the staircase. In addition, since the carpenter can perform the staircase construction work after completing the cross pasting, the trouble of the carpenter work is eliminated twice.

According to the sixth aspect of the present invention, when the fixing fitting is fixed to the wall, the screw is not driven into a wall base material such as a gypsum board as in the prior art, and has a higher strength than the wall base material. Since it is driven into the housing via the projections, the upper end of the spar can be firmly fixed to the wall via the fixing bracket. Therefore, a staircase mounting structure with a high fixed strength can be obtained by simple construction. In addition, since the carpenter can perform the staircase construction work after completing the cross pasting, the trouble of the carpenter work is eliminated twice.

Front view (a), top view (b), bottom view (c), left side view (d), right side view (e), and rear view of a fixture according to one embodiment (Example 1) of the present invention (Example 1) f). It is a side view of the attachment structure of the staircase which fixed the upper end of the spar in the wall using this fixing bracket. It is a top view which shows the structure relevant to one sagging girder in the attachment structure. It is a perspective view of the attachment structure. It is a principal part enlarged side view of the attachment structure. It is a principal part enlarged plan view of the attachment structure. It is a principal part enlarged front view of the attachment structure. Front view (a), plan view (b), bottom view (c), left side view (d), right side view (e) of a fixture used to fix the lower end of the spar girder to the floor in the same mounting structure It is a rear view (f). Front view (a), plan view (b), bottom view (c), left side view (d), right side view (e) and rear view of a fixture according to another embodiment (Example 2) of the present invention. f). It is a side view of the attachment structure of the staircase which fixed the upper end of the spar in the wall using this fixing bracket. It is a top view which shows the structure relevant to one sagging girder in the attachment structure. It is a principal part enlarged side view of the attachment structure. It is a principal part enlarged plan view of the attachment structure. It is a principal part enlarged front view of the attachment structure. Front view (a), top view (b), bottom view (c), left side view (d), right side view (e), and rear view of a fixture according to still another embodiment (Example 3) of the present invention. (F). It is a side view of the attachment structure of the staircase which fixed the upper end of the spar in the wall using this fixing bracket. It is a top view which shows the structure relevant to one sagging girder in the attachment structure. It is a principal part enlarged side view of the attachment structure. It is a principal part enlarged plan view of the attachment structure. It is a principal part enlarged front view of the attachment structure. It is the front view (a) and right view (b) of the fixing metal fitting by further another embodiment (Example 4) of this invention. It is the top view (a) and bottom view (b) of this fixture. It is a side view of the attachment structure of the staircase which fixed the upper end of the spar in the wall using this fixing bracket. It is a top view which shows the structure relevant to one sagging girder in the attachment structure. It is a principal part enlarged side view of the attachment structure. It is a principal part enlarged plan view of the attachment structure. It is a principal part enlarged front view of the attachment structure.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, a metal fitting used for fixing the upper end of the spar girder to the wall in the first embodiment will be described with reference to FIG. The upper end fixing bracket 10 includes a wall surface fixing plate 11 and a pair of saddle girder side surface fixing plates 12a and 12b erected from one surface of the wall surface fixing plate 11 (generally indicated by reference numeral 12 when it is not necessary to distinguish between them). A main body 13 having a substantially U-shaped cross section. On the other surface side of the wall surface fixing plate 11, hollow cylindrical projections 14, 14 are provided at two locations, upper and lower. The hollow cylindrical protrusion 14 has a protruding length that is substantially the same as or slightly smaller than the thickness of the wall base material, and, as will be described later, a wall surface fixing screw (a countersunk screw) for fixing the upper end fixing bracket 10 to the wall surface. Is driven from the wall surface fixing plate 11 side, so that the countersink 15 is provided so that the screw head is within the thickness range of the wall surface fixing plate 11 and does not protrude from the wall surface fixing plate surface. Further, in each of the lateral girder side surface fixing plates 12, a lateral girder side surface fixing screw 29 for driving a lateral girder side surface fixing screw 29 (described later) for fixing the vertical girder to the upper end fixing bracket 10 fixed to the wall 22. Holes 16a and 16b (which may be collectively indicated by reference numeral 16 when there is no need to distinguish between them) are provided at two locations in the upper and lower sides. As can be seen from FIGS. 1D and 1E, the lateral girder side surface fixing plates 16a and 16b penetrating the left and right lateral girder side surface fixing plates 12a and 12b are formed so as to be displaced in the vertical direction. . The distance between the side girders 12a and 12b is approximately the same as the thickness of the girder.

The material of the upper end fixing bracket 10 is preferably made of metal such as stainless steel, aluminum, galvanized steel sheet, painted steel sheet, painted plated steel sheet, brass plated steel sheet, casting, etc. in terms of physical properties such as strength, but is not limited thereto. It is not something. Further, the dimensions of the upper end fixing bracket 10 are determined according to the thickness of the sheathing girder 23 fixed thereby, the thickness of the gypsum board 26 used as the wall base material, and the like. The distance between the fixing plates 12a and 12b is 60 mm, which is the same as the thickness of the cage girder 23, the wall thickness of the wall surface fixing plate 11 and the girder girder side surface fixing plates 12a and 12b is 4.5 mm, and the projections of the hollow cylindrical projections 14 and 14 Length 12mm (when the thickness of the plaster board 26 is 12.5mm) The outer diameter is 20mm, the inner diameter is 13mm, the center distance in the vertical direction is 60mm, and the screw holes 16a, 16a; And the center distance in the vertical direction is 50 mm, and the screw girder side surface fixing screw holes 16a and 16a of the surface girder side surface fixing plate 12a are 30 mm from the upper edge and The center holes are positioned at positions 10 mm from the edge, and the screw holes 16 b and 16 b for fixing the side faces of the side face fixing plate 12 b are located at positions 15 mm from the upper edge of the wall face fixing board 11 and 25 mm from the lower edge, respectively. It is formed so as to be shifted in the vertical direction so as to have.

A staircase structure in which the upper end of the spar is fixed to the wall using the upper end fixing bracket 10 is shown in FIGS. The staircase structure 20 includes a pair of left and right spar 23a and 23b provided in a slanting manner between the floor 21 and the wall 22 (there may be generally indicated by reference numeral 23 when it is not necessary to distinguish between). It comprises a plurality of treads 24 installed above the counter beams 23, 23, and the upper ends of the counter beams 23, 23 are fixed to the wall 22 via the upper end fixing bracket 10, and the lower ends thereof are connected via the lower end fixing bracket 30. Fixed to the floor 21.

In this staircase structure 20, the wall 22 is configured by applying a gypsum board 26 as a wall base material to a structural housing 25 such as a column or a beam, and applying a cross tension finish (not shown) thereon. Therefore, the soft gypsum board 26 exists on the wall surface side of the housing 25, but can be driven into the housing 25 through the wall fixing screws 27, 27 into the hollow cylindrical projections 14, 14 of the upper end fixing bracket 10. In more detail with reference to FIGS. 5 to 7, the gypsum board 26 where the hollow cylindrical projections 14, 14 are inserted is provided with projection receiving holes 28, having dimensions corresponding to the outer diameter of the projections. The hollow cylindrical projections 14 and 14 are fitted into the projection receiving holes 28 and 28. Since the projecting length of the hollow cylindrical projections 14 and 14 is substantially the same as or slightly smaller than the thickness of the gypsum board 26 (for example, about 0.5 mm), the hollow cylindrical projections 14 and 14 are accommodated in the projection of the gypsum board 26. By fitting into the holes 28, 28, the ends of the hollow cylindrical projections 14, 14 are brought into close contact with the housing 25, and the wall surface fixing plate 11 of the upper end fixing bracket 10 is brought into close contact with the wall surface (FIGS. 5 and 6). . In this state, the upper end fixing bracket 10 is firmly fixed to the casing 25 by driving the hollow cylindrical projections 14 and 14 through the wall fixing screws 27 and 27 into the casing 25. A gypsum board 26 is interposed between the wall surface fixing plate 11 and the casing 25 of the upper end fixing bracket 10, but the hollow cylindrical projections 14, 14 pass through the projection receiving holes 28, 28 of the gypsum board 26, and the tip ends thereof. Since the upper end fixing bracket 10 is attached in a state of being in contact with the casing 25, a large fixing strength can be exerted on the casing 25. The upper end fixing bracket 10 is fixed to the wall 22 for each of the cage girders 23. Therefore, the two upper end fixtures 10 are secured to the wall 22 at the same height at the two left and right positions corresponding to the distance between the cage girders 23, 23. Is done.

In this manner, the upper end of the spar 23 is fixed to each upper end fixing bracket 10 that is firmly fixed to the housing 25. This fixing is performed by inserting the cage girder 23 between the cage girder side surface fixing plates 12a and 12b of the upper end fixing metal fitting 10 and pushing the upper end until it substantially contacts the wall surface fixing plate 11. 12b is inserted into the screw holes 16a and 16b for fixing the side surface of the girder side surface, and the screw 29a and 29b for fixing the side surface of the girder beam (which may be generally indicated by reference numeral 29 when it is not necessary to distinguish between them) The upper end of 23 is fixed to the upper end fixing bracket 10. As described above, since the screw holes 16a and 16b of the vertical girder side surface fixing plates 12a and 12b are formed at different positions in the vertical direction, even if the vertical girder side surface fixing screws 29a and 29b are driven from both sides, they do not interfere ( FIG. 7).

The lower end fixing metal fitting 30 for fixing the lower ends of the spar 23 and 23 to the floor 21 is not directly related to the present invention and is not limited at all. However, the lower end fixing metal fitting 30 as shown in FIG. 8 is used as an example. Can do. The lower end fixing bracket 30 is formed in a substantially L shape from a floor surface fixing plate 31 and a saddle girder side surface fixing plate 32 bent at right angles in one direction from one end thereof. Floor fixing screw holes 33 and 33 are formed through at two locations, and a long hole 34 is formed in the center between the screw holes 33 and 33 in the vertical direction. In the upper and lower two parts, screw holes 35, 35 for fixing the side surfaces of the girder are penetratingly formed. As can be seen from FIGS. 7 and 8, the lateral girder side surface fixing screw holes 35 penetrating the left and right lateral girder side surface fixing plates 32 are formed at positions shifted from the center in the vertical direction. A pair of such lower end fixing brackets 30 is used, and the lower end of the spar 23 is sandwiched from both sides, and the floor 21 is screwed through the floor surface screw holes 33, 33 of the floor surface fixing plate 31. (Not shown) and fixed to the shearing girder 23 with screws (not shown) that pass through the screwing girder side surface fixing screw holes 35 of the weiring girder side surface fixing plate 32. The material of the lower end fixing bracket 30 is preferably made of metal such as stainless steel, aluminum, galvanized steel sheet, painted steel sheet, brass plated steel sheet, casting, etc. from the viewpoint of physical properties such as strength, but is not limited thereto. .

Next, a construction method for obtaining the staircase structure 20 will be described. There are two possible construction methods for this construction method. The first construction method can be performed in the following order.
(1) A wall 22 is constructed by placing a gypsum board 26 and a cloth (not shown) on the housing 25, and a floor 21 is constructed by placing a flooring (not shown).
(2) The wall surface fixing position (position where the projection receiving holes 28 and 28 are formed) of the upper end fixing bracket 10 for fixing the upper end of the spar 23 is positioned based on the design drawing.
(3) Protrusion receiving holes 28 and 28 are formed in the gypsum board 26 at the positions determined as described above.
(4) The hollow cylindrical projections 14 and 14 of the upper end fixing bracket 10 are fitted into the projection receiving holes 28 and 28, and the hollow cylindrical projections 14 and 14 are driven through the wall fixing screws 27 and 27 into the housing 25 to fix the upper ends. The metal fitting 10 is fixed to the housing 25.
(5) Insert the upper end of the counter girder 23 between the side girders side fixing plates 12a and 12b of the upper end fixing bracket 10 fixed to the wall 22 so as to be in contact with the floor 21 and the wall 22; The lower end fixing bracket 30 is temporarily fixed to the floor fixing position, and the bottom end fixing bracket 30 is driven from both sides through the screws 42 and 42 (FIG. 2) into the vertical girder side fixing screw holes 35 and 35 on the lower end side surface of the counter girder 23. 30 is fixed to the lower end side surface of the spar 23. When the pair of lower end fixing metal fittings 30 shown in FIG. 8 are used facing each other, the positions of the screw holes 35, 35 for fixing the side surfaces of the girder are shifted in the vertical direction. There is no interference even if it is driven. The lower end fixing bracket 30 is temporarily fixed by driving it into the floor 21 through screws (not shown) in the long holes 34 of the floor surface fixing plate 31 of the lower end fixing bracket 30.
(6) After loosening the screw of the long hole 34 and adjusting the vertical and front / rear positions of the counter girder 23, the screw of the long hole 34 is tightened to determine the fixing position.
(7) At the position determined above, the pair of lower end fixing brackets 30 are opposed to each other at a predetermined interval and fixed to the floor 21. The lower end fixing bracket 30 is fixed to the floor 21 by driving into the floor 21 through screws 43 and 43 (FIG. 3) into the floor surface fixing screw holes 33 and 33. After this fixing, the screw passed through the long hole 34 may be removed, or may be left in a tightened state as necessary.
(8) Insert the upper end of the counter girder 23 between the counter girder side fixing plates 12a and 12b of the upper end fixing bracket 10 fixed to the wall 22, and fix the counter girder side fixing screw 29a into the counter girder side fixing screw holes 16a and 16b. , 29b, the upper end of the spar 23 is fixed to the upper end fixing bracket 10 by driving into the top side of the spar 23 from both sides. As described above, since the screw holes 16a and 16b of the lateral girder side surface fixing plates 12a and 1b are formed at different positions in the vertical direction, no interference occurs even if the lateral girder side surface fixing screws 29a and 29b are driven from both sides (see FIG. 7).
(9) The tread plate 24 is fixed to a predetermined portion of the cage girder 23 fixed as described above via the tread plate fixing bracket 41 (FIG. 4), and the construction of the staircase structure 20 is completed.

Or it can carry out in the following order as a 2nd construction method.
(1) A wall 22 is constructed by placing a gypsum board 26 and a cloth (not shown) on the housing 25, and a floor 21 is constructed by placing a flooring (not shown).
(2) The position in the left-right direction where the spar 23 is constructed is positioned from the left or right wall, and the spar 23 is placed on the floor 21 and the wall 22 at the positioned left-right direction. The wall surface fixing position of the fixing bracket 10 (position where the projection receiving holes 28 and 28 are formed) and the floor surface fixing position of the lower end fixing bracket 30 are located.
(3) Protrusion receiving holes 28 and 28 are formed in the gypsum board 26 at the wall surface fixing position of the upper end fixing bracket 10 determined as described above.
(4) The hollow cylindrical projections 14 and 14 of the upper end fixing bracket 10 are fitted into the projection receiving holes 28 and 28, and the hollow cylindrical projections 14 and 14 are driven through the wall fixing screws 27 and 27 into the housing 25 to fix the upper ends. The metal fitting 10 is fixed to the housing 25. Further, the pair of lower end fixing brackets 30 are opposed to each other at a predetermined interval and fixed to the floor 22 at the position determined as described above. The fixing brackets 10 and 30 are fixed in the same manner as described in the first construction method.
(5) Inserting the upper end of the shearing girder 23 between the lateral girder side fixing plates 12a, 12b of the upper end fixing bracket 10 fixed to the wall 22 and also fixing the side girder side fixing plate of the pair of lower end fixing brackets 30 fixed to the floor 21 The lower end of the spar 23 is inserted between 32 and 32.
(6) In the same manner as described in the first construction method, the lower end of the spar 23 is fixed between the pair of lower end fixing brackets 30 and 30.
(7) In the same manner as described in the first construction method, the upper end of the spar 23 is fixed to the upper end fixture 10.
(8) The tread plate 24 is fixed to a predetermined portion of the cage girder 23 fixed as described above via the tread plate fixing bracket 41 (FIG. 4), and the construction of the staircase structure 20 is completed.

Next, an upper end fixing bracket used for fixing the upper end of the spar 23 in the wall in Embodiment 2 will be described with reference to FIG. Similar to the upper end fixing bracket 10 of the first embodiment, the upper end fixing bracket 10 includes a wall surface fixing plate 11 and a pair of spar girder side surface fixing plates 12 a and 12 b erected from one surface of the wall surface fixing plate 11. And a hollow cylindrical projection 14, 14 is provided at two upper and lower portions on the other surface side of the wall surface fixing plate 11. The girder side surface fixing screw holes 16a and 16b for driving the girder side surface fixing screw are provided.

The upper end fixing bracket 10 according to the second embodiment is different from the upper end fixing bracket 10 according to the first embodiment in that the upper edge 17 of the spar girder side surface fixing plates 12a and 12b is downward from the front end side toward the wall surface fixing plate 11 side. An inclined guide edge 17a, a pin receiving groove 17b recessed in a substantially semicircular arc from the lower end thereof, and a horizontal edge 17c extending substantially horizontally between the wall surface fixing plate 11 and the pin receiving groove 17b. It is a point formed as a thing. Further, in order to adopt such an upper edge 17 configuration, the spar girder side fixing plates 12a and 12b are formed wider in the front-rear direction than the spar girder side fixing plates 12a and 12b of the upper end fixing bracket 10 of the first embodiment. Along with this, two screw holes 16a and 16b for fixing the side surfaces of the girder are formed in the front and rear and up and down, for a total of four. Since the other configuration is the same as that of the upper end fixing bracket 10 of the first embodiment, the same reference numerals are given and the detailed description is omitted.

A staircase structure in which the upper end of the spar is fixed to the wall using the upper end fixing bracket 10 is shown in FIGS. Similar to the staircase structure 20 of the first embodiment, the staircase structure 20 includes a pair of right and left saddle beams 23 (23a, 23b) provided in a slanting manner between the floor 21 and the wall 22; The upper ends of the spar 23, 23 are fixed to the wall 22 via the upper end fixing bracket 10, and the lower ends are fixed to the floor 21 via the lower end fixing bracket 30. .

The staircase structure 20 of the second embodiment is different from the staircase structure 20 of the first embodiment in that pins 36 provided so as to protrude from the upper end side surface of the spar 23 to both sides are arranged on the side spar side fixing plate 12 a of the top stool 10. , 12b is moved along the guide edge 17a provided on the upper edge 17 and is accommodated in the pin accommodating groove 17b so that the upper end of the spar 23 is substantially in close contact with the wall 22 and held in this position. It is. That is, in the staircase structure 20 of the second embodiment, the pins 36 protruding outward from both sides from the upper end side surface of the sheathing girder 23 are accommodated in the pin accommodating grooves 17b and 17b of the sheathing girder side surface fixing plates 12a and 12b of the upper end fixing bracket 10. It has been stopped. In addition, as the pin 36, one round bar-like member having a dimension longer than the thickness of the sheathing girder 23 is protruded to both sides through the thickness of the sheathing girder 23, and these projecting end portions are pin receiving grooves 17b, 17b. The pin 36 may be formed in any shape, and instead of passing a single pin through the spar 23, each side of the spar 23 is outward. A pair of protruding short pins may be provided. When a short pin is used, after fixing the spar 23, the projecting short pin is driven or screwed into the pin receiving groove 18b so as to eliminate protrusions from both sides of the spar 23. Then, the pin 36 is not exposed in the staircase structure 20 after construction, and the appearance can be improved. Since others are the same as the staircase structure 20 of Example 1, the same code | symbol is attached | subjected and detailed description is omitted.

This staircase structure 20 can be constructed as follows.
(1) A wall 22 is constructed by placing a gypsum board 26 and a cloth (not shown) on the housing 25, and a floor 21 is constructed by placing a flooring (not shown).
(2) The wall surface fixing position (position where the projection receiving holes 28 and 28 are formed) of the upper end fixing bracket 10 for fixing the upper end of the spar 23 is positioned based on the design drawing. Alternatively, the position in the left-right direction where the sheath girder 23 is to be constructed is located from the left or right wall, and the upper end is fixed with the cage girder 23 being applied to the floor 21 and the wall 22 in the located left-right direction position. The wall surface fixing position of the metal fitting 10 (position where the projection receiving holes 28 and 28 are formed) and the floor surface fixing position of the lower end fixing metal fitting 30 are located.
(3) Protrusion receiving holes 28 and 28 are formed in the gypsum board 26 at the position of the upper end fixing bracket determined as described above.
(4) The hollow cylindrical projections 14 and 14 of the upper end fixing bracket 10 are fitted into the projection receiving holes 28 and 28, and the hollow cylindrical projections 14 and 14 are driven through the wall fixing screws 27 and 27 into the housing 25 to fix the upper ends. The metal fitting 10 is fixed to the housing 25.
(5) The pin 36 is attached so as to protrude from the upper end side surface of the spar 23 to both sides.
(6) The pin 36 is placed on the upper edge 17 of the upper end fixing bracket 10, moved along the guide edge 17 a, moved toward the wall surface 22, and housed and locked in the pin housing groove 17 b, so Is temporarily placed.
(7) At this position, the upper end of the cage girder 23 is fixed to the upper end fixing bracket 10 with the cage girder side surface fixing screw 29.
(8) The lower end fixing bracket 30 is fixed to the floor 21 with screws 43 and 43 (FIG. 11) at the position determined as described above, and the lower end of the spar 23 is fixed to the fixed lower end fixing bracket 30 with screws 42 and 42 (FIG. 10). Secure with. When the pair of lower end fixing metal fittings 30 shown in FIG. 8 are used facing each other, the positions of the screw holes 35, 35 for fixing the side surfaces of the girder are shifted in the vertical direction. There is no interference even if it is driven.
(9) The tread plate 24 is fixed to a predetermined portion of the cage girder 23 fixed as described above via the tread plate fixing bracket 41 (FIG. 4), and the construction of the staircase structure 20 is completed.

A third embodiment of the present invention will be described with reference to FIGS. This embodiment is a modification of the second embodiment, and in the upper end fixing bracket 10 (FIG. 9) of the second embodiment, a guide edge 17a and a pin receiving groove 17b are formed on the upper edge 17 of the spar girder side surface fixing plates 12a and 12b. Instead of this, in this embodiment, a concave portion 19 is formed from the front edge 18 to the inner side of the side face fixing plates 12a and 12b. The concave portion 19 extends downward from the front edge 18 toward the wall fixing plate 11 side. The difference is that the guide edge 19a inclined to the top and the pin receiving groove 19b recessed in a substantially semicircular arc shape are formed at the back end thereof, but the operation is substantially the same as that of the second embodiment. Other configurations of the upper end fixing bracket 10 are the same as those of the upper end fixing bracket 10 of the first and second embodiments, and the staircase structure 20 using the upper end fixing bracket 10 and the construction method thereof are also the same as those of the first and second embodiments. The detailed explanation about these will be omitted.

In the second and third embodiments, the pin receiving grooves 17b and 19b are formed at the lower ends of the guide edges 17a and 19a. However, the pin receiving grooves 17b and 19b are not necessarily formed and can be omitted. . By forming the pin receiving grooves 17b and 19b, the pins 36 protruding from the both sides of the sheathing girder 23 can be temporarily placed by being accommodated in the pin receiving grooves 17b and 19b. However, even if the pin receiving grooves 17b and 19b are omitted, if the pin 36 is placed on the guide edges 17a and 19a, the further girder is automatically obtained. Since the effect of facilitating the construction work by moving the upper end of 23 in the direction in which it is in close contact with the wall 22 is obtained, this can also be a preferred embodiment.

Next, an upper end fixing bracket used for fixing the upper end of the spar 23 in the wall in Embodiment 4 will be described with reference to FIGS. 21 and 22. Similar to the upper end fixing bracket 10 of the first embodiment, the upper end fixing bracket 10 includes a wall surface fixing plate 11 and a pair of spar girder side surface fixing plates 12 a and 12 b erected from one surface of the wall surface fixing plate 11. And a hollow cylindrical projection 14, 14 is provided at two upper and lower portions on the other surface side of the wall surface fixing plate 11. The girder side surface fixing screw holes 16a and 16b for driving the girder side surface fixing screw are provided.

The upper end fixing bracket 10 of the fourth embodiment is different from the upper end fixing bracket 10 of the first embodiment in that the wall surface fixing plate 11 is formed in an elongated shape extending upward, and the lateral girder side surface fixing plates 12a and 12b are also wall surfaces. Left and right vertical pieces 37 and 37 are formed to extend upward by the same length as the fixing plate 11, and an upper end vertical piece 38 having the same height as the left and right vertical pieces 37 and 37 is formed at the upper end of the wall surface fixing plate 11. It is a point. The length of the wall surface fixing plate 11 is substantially the same as the upper end length of the counter girder 23 in contact with the wall surface 22. In addition, the three side walls fixing plates 12a and 12b are provided with three vertical holes 16a and 16b for fixing the side surfaces of the vertical girder at equal intervals, and the hollow wall fixing plate 11 has four hollows. Cylindrical protrusions 14 are formed at equal intervals in the vertical direction. Further, the tongue piece 39 is formed so as to extend obliquely downward from the lower end of the wall surface fixing plate 11, and the tongue piece 39 is different in that a long slot 40 is formed along the extending direction. The inclination angle of the tongue piece 39 with respect to the surface of the wall surface fixing plate 11 is preferably 44 to 48 degrees. Since the other configuration is the same as that of the upper end fixing bracket 10 of the first embodiment, the same reference numerals are given and the detailed description is omitted.

FIG. 23 to FIG. 27 show a staircase structure in which the upper end of the further girder is fixed to the wall using the upper end fixing bracket 10. Similar to the staircase structure 20 of the first embodiment, the staircase structure 20 includes a pair of right and left saddle beams 23a and 23b provided in a slanting manner between the floor 21 and the wall 22, and above the above-mentioned saddle beams 23 and 23. It comprises a plurality of treads 24 that are installed, and the upper ends of the spar 23 and 23 are fixed to the wall 22 via the upper end fixing bracket 10 and the lower ends are fixed to the floor 21 via the lower end fixing bracket 30.

The staircase structure 20 of the fourth embodiment is different from the staircase structure 20 of the first embodiment in that the wall surface fixing plate 11 attached in contact with the wall surface 22 is approximately equal to the length in which the upper end of the spar 23 is in contact with the wall surface 22. Since the tongue piece 39 extends obliquely downward at the lower end, the upper end of the spar 23 is placed on the tongue piece 39. Further, the upper and lower portions of the spar 23 are positioned between the upper end vertical piece 38 and the tongue piece 39, and the spar spar side fixing plates 12a and 12b and the upper extension portions thereof extend over the entire length in the vertical direction. Between the left and right vertical pieces 37, 37, and positioned, there is an advantage of being held in a stable state in the vertical and horizontal directions. Further, since the wall fixing plate 11 is extended upward over the region where the upper end of the spar 23 is in contact with the wall 22, it is possible to prevent a gap from being generated between the upper end of the spar 23 and the wall 22. Moreover, even if a gap occurs, there is an advantage that the left and right vertical pieces 37 and 37 can conceal the gap. Since others are the same as the staircase structure 20 of Example 1, the same code | symbol is attached | subjected and detailed description is omitted.

This staircase structure 20 can be constructed as follows.
(1) A wall 22 is constructed by placing a gypsum board 26 and a cloth (not shown) on the housing 25, and a floor 21 is constructed by placing a flooring (not shown).
(2) The wall surface fixing position (position where the projection receiving holes 28 and 28 are formed) of the upper end fixing bracket 10 for fixing the upper end of the spar 23 is positioned based on the design drawing.
(3) Protrusion receiving holes 28 and 28 are formed in the gypsum board 26 at the positions determined as described above.
(4) The hollow cylindrical projections 14 and 14 of the upper end fixing bracket 10 are fitted into the projection receiving holes 28 and 28, and the hollow cylindrical projections 14 and 14 are driven through the wall fixing screws 27 and 27 into the housing 25 to fix the upper ends. The metal fitting 10 is fixed to the housing 25.
(5) The upper end of the spar 23 is inserted in the state where the upper end of the spar 23 is inserted between the side slats 12a, 12b of the spar 10 fixed to the wall 22 and temporarily placed on the tongue 39. Is fixed to the upper end fixing bracket 10 with the side beam fixing screw 29. Since the long hole 40 is formed in the tongue piece 39, a temporarily placed state can be easily obtained by hooking a projection (not shown) of a metal fitting attached to the lower surface of the upper end of the spar 23.
(6) The lower end fixing bracket 30 is fixed to the floor 21 with screws 43 and 43 (FIG. 24), and the lower end of the cage girder 23 is fixed to the fixed lower end fixing bracket 30 with screws 42 and 42 (FIG. 23). When the pair of lower end fixing brackets 30 shown in FIG. 7 are used facing each other, the positions of the screw holes 35, 35 for fixing the side surfaces of the girder are shifted in the vertical direction. There is no interference even if it is driven.
(7) The tread plate 24 is fixed to the predetermined position of the sheathing girder 23 fixed as described above via the tread plate fixing bracket 41 (FIG. 4), and the construction of the staircase structure 20 is completed.

In the upper end fixing bracket 10 of the fourth embodiment, the wall surface fixing plate 11 is extended upward, and the saddle girder side surface fixing plates 12a, 12b are also extended upward by the same length as the wall surface fixing plate 11, and left and right vertical pieces 37, 37 are provided. And the point where the upper end vertical piece 38 is formed and the point where the tongue piece 39 extending obliquely downward from the lower end of the wall surface fixing plate 11 is formed, but only one of these is provided. Alternatively, the upper end fixing bracket 10 may be implemented. That is, a configuration in which only the former features (left and right vertical pieces and upper vertical piece) are added to the upper end fixing bracket 10 of the first embodiment (or the second and third embodiments) may be adopted, and the latter may be adopted. You may employ | adopt the structure which added only the characteristic (tongue piece 39).

The present invention has been described in detail with reference to the examples. However, the present invention is not limited to these examples, and may be arbitrarily modified within the scope of the invention described in the claims. Can do. For example, the shape of the hollow cylindrical protrusion 14 is not limited to the illustrated cylindrical shape, and any shape can be used as long as it has a hollow shape through which the wall surface fixing screw 27 can be inserted. The protrusion receiving hole 28 formed in the gypsum board 26 is formed in a shape that matches the outer shape of the hollow cylindrical protrusion 14.

In the present invention, the upper end fixing bracket 10 is fixed to the housing 25 through a gypsum board 26 as a wall base material. More specifically, the hollow cylindrical protrusion 14 of the upper end fixing bracket 10 is attached to the gypsum board 26. The wall fixing screw 27 is inserted into the hollow cylindrical protrusion 14 and is driven into the casing 25 and fixed in a state where it is inserted into the protrusion receiving hole 28 and its tip is in contact with the surface of the casing 25. Accordingly, the wall surface fixing screw 27 needs to have a diameter and a length capable of firmly fixing the upper end fixing bracket 10 to the housing 25. Furthermore, if this wall fixing screw 27 has a hexagonal groove on the head, it can be fastened and fixed with a hexagon wrench, which is a preferred embodiment for realizing stronger fixation. . Also, a so-called coach is used for the side girder fixing screw 29 used to fix the upper end of the spar 23 to the upper end fixing bracket 10 and / or the screw used to fix the lower end of the spar 23 to the lower end fixing bracket 30. It is preferable to use a screw.

Further, in the fourth embodiment, the long hole 40 formed in the tongue piece 39 can project the long hole as long as it can hook the protrusion (not shown) of the metal fitting attached to the lower surface of the upper end of the spar 23. The shape and dimensions are not limited. In the embodiment, the long elongated hole 40 is formed in the extending direction of the tongue piece 39, and there is an advantage that the position can be adjusted in the front-rear direction in a state where the protrusion is hooked. Further, when the upper end of the spar 23 is fixed in a state of being sandwiched between the pair of spar side surface fixing plates 12a and 12b of the upper end fixing bracket 10, the upper end of the spar 23 is notched in the illustrated embodiment. A pair of spar girder side surface fixing plates 12a and 12b are formed at substantially the same interval as the thickness thereof, but when the top end of the spar 23 is notched to reduce the thickness of the top end, A pair of shear girder side surface fixing plates 12a and 12b is formed at intervals according to the thickness.

10 Upper end fixing bracket (fixing bracket of the present invention)
11 Wall surface fixing plate 12 (12a, 12b) Sagittal girder side fixing plate 13 Main body 14 Hollow cylindrical projection 15 Dish processing 16 (16a, 16b) Saws girder side surface fixing screw hole 17 Upper edge 17 of the sagittal girder side fixing plate 17a Guide edge 17b Pin receiving groove 17c Horizontal edge 18 Front edge 19 of the saddle girder side fixing plate 19 Recess 19a Guide edge 19b Pin receiving groove 20 Stair structure 21 Floor 22 Wall 23 Shearing girder 24 Tread plate 25 Wall structure frame 26 Gypsum board (wall base material)
27 Wall Fixing Screw 28 Projection Receiving Hole 29 Sheath Girder Side Fixing Screw 30 Lower End Fixing Fixture 31 Floor Surface Fixing Plate 32 Sheath Girder Side Fixing Plate 33 Floor Surface Fixing Screw Hole 34 Long Hole 35 Sheath Girder Side Fixing Screw Hole 36 Pin 37 Left and right vertical piece 38 Upper end vertical piece 39 Tongue piece 40 Long hole 41 Tread plate fixing bracket 42 Screw fixing the lower end of the girder to the lower end fixing bracket 43 Screw fixing the lower end fixing bracket to the floor

Claims (6)

A fixing metal fitting for fixing the upper end of the stairway girder to the structural frame through the wall base material, comprising a wall fixing plate and a pair of side girder side fixing plates erected from one surface of the wall fixing plate. A main body having a substantially U-shaped cross section, a hollow cylindrical projection protruding from the other surface of the wall surface fixing plate, and a screw beam for fixing the side surface of the side surface of the side wall Fixed metal fitting. 2. The fixing bracket according to claim 1, wherein the hollow cylindrical protrusion has a protruding length substantially the same as or slightly shorter than the thickness of the wall base material. A guide edge inclined downward from the front end side toward the wall surface fixing plate side is disposed on the upper edge or the front edge of the lateral girder side fixing plate, and a pin protruding outward from the side surface of the vertical girder is placed on the guide edge The fixing bracket according to claim 1, wherein the fixing bracket is possible. The fixing bracket according to claim 3, wherein a recess capable of accommodating the pin is provided at an end of the guide edge. A staircase mounting structure using the fixing bracket according to any one of claims 1 to 4, wherein a hollow cylindrical protrusion is inserted into a protrusion receiving hole formed through the thickness of the wall base material, and a wall surface fixing plate The fixing bracket is fixed to the wall by passing the wall fixing screw through the hollow cylindrical projection and placing it in contact with the wall surface, and the upper end of the spar is placed between the pair of spar A structure for mounting a staircase, characterized in that the spar girder is fixed to a fixing bracket by passing the spar girder side fixing screw through the spar girder side fixing screw hole and driving it into the side of the sword girder. A method for constructing a staircase using the fixing bracket according to any one of claims 1 to 4, wherein a hollow cylindrical projection is fitted into a projection receiving hole formed through the thickness of the base material of the wall surface, With the fixing plate in contact with the wall surface, pass the wall fixing screw through the hollow cylindrical projection and drive it into the housing to fix the fixing bracket to the wall, and sandwich the upper end of the shearing girder between the pair of lateral girder fixing plates. A method for constructing a staircase, characterized in that, in the state, the girder girder side fixing screw is passed through the girder girder side fixing screw hole and driven into the side surface of the girder girder to fix the girder girder to the fixing bracket.