JP2017145607A - Strut mounting structure of wooden flat roof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strut mounting structure of a wooden flat roof, the structure facilitating adjustment between a plate with bolts and an attaching position of a strut according to the circumstances without changing design, and has high flexibility of the attaching position of the strut.SOLUTION: A strut mounting structure of a wooden flat roof is provided with a plate 2 with bolts where the bolts 21 are set up, and a strut 4 being bolted to the bolts 21 of the plate 2 with the bolts. Multiple screw holes 22 to be screwed in a sheathing roof board A1 are drilled in the plate 2 with the bolts, and 4-bolts 22 are set up at the position except the center of the plate. The strut 4 has a base plate 40 bolted to the bolts 21, and a strut body 41 set up to the base plate 40. The strut 4 is fixed to a flat roof A through the plate 2 with the bolts by the strut body 41 mounted to the base plate 40 so that the center position may be in an area surrounded by the 4-bolts 21 in a plan view.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a mounting structure for a column such as a fence, and more particularly to a column mounting structure when a column is erected on a flat roof in a wooden building having a flat roof.

  In wooden buildings, it is heavy and difficult to use concrete for the roof that can be seamlessly integrated and can easily realize a waterproof structure. When a concrete roof is not used, if the roof gradient is small, there is a problem in waterproofness. Therefore, in a wooden building, a land roof with a loose roof gradient is rarely used.

  However, in recent years, from the viewpoint of effective use of the rooftop part, the roof is also installed in a wooden building for multi-purpose use such as installing a solar power generation panel on the roof or making the roof as a clothesline. There are many examples. As part of this, handrails for preventing falls and pillars for attaching outdoor equipment and other equipment have been frequently installed around the flat roof.

  For example, Patent Document 1 discloses a mounting structure for mounting a gantry for a photovoltaic power generation panel on an ALC roof material of a lightweight steel structure building, and a waterproof sheet is attached after the gantry support material is mounted on the roof surface. A mount mounting structure that can be constructed is disclosed (see paragraphs [0021] to [0033] of the specification of Patent Document 1, FIGS. 1 and 5 of the drawings, etc.).

  However, the gantry mounting structure of Patent Document 1 is a gantry mounting structure for mounting a gantry for a photovoltaic power generation panel to an ALC roof material to the last, and such a gantry mounting structure is applied to a column mounting structure of a wooden building. Even if it does, it is thought that the stress which acts on a support | pillar cannot be supported by the field board (roof board) which consists of a thin wooden board. In other words, when the pedestal mounting structure of Patent Document 1 is applied to a wooden building, it is considered that the screws that are fastened to the roof plate are pulled out without being able to withstand the rotational moment applied to the base plate at the base of the column.

  Moreover, as an example of attaching a column to a roof of a wooden building, in Patent Document 2, a bolt (2) for mounting equipment on a roof is fixed to a metal plate (1) with screws and nail holes, and the metal plate ( 1) A fixture base having a double-sided adhesive waterproof material (3) bonded to the back side is provided, and the mounting base is covered with a waterproof cover (4) having a double-sided adhesive waterproof material (5) bonded to the back side. A flat-type western rooftop installation equipment fixture is disclosed (claim 1 of patent document 2, paragraphs [0008] to [0011] of the specification, FIGS. 1 and 2 of the drawings). Etc.).

  However, the roof-mounted installation fixture for flat-type Western roofs described in Patent Document 2 is not a column mounting structure for mounting a column on a flat roof, and a device such as a solar generator or a solar water heater is not peeled off without stripping the roof tiles. Although it can be attached, when it is applied to a pillar that has a rotational moment acting on the base of a pillar such as a fence, the screw or nail of the metal plate (1) attached to the roof tile with a screw or nail is removed. Therefore, there is a problem that the desired strength cannot be exhibited.

  In addition, when the roof-mounted installation equipment fixture for flat-type western roofs described in Patent Document 2 is applied to a post that cannot be directly attached to a mounting bolt (2) such as a fence post, the mounting bolt (2) is It is difficult to mount due to interference with the struts, and the stress acting from a certain direction is caused by the misalignment between the center position of the struts and the mounting bolt (2) erected at the center position of the metal plate (1). There is a problem that a stable supporting force cannot be obtained regardless of the direction of the stress, and the degree of freedom in design is small.

  On the other hand, with the aging of the population, a new use of the wooden rooftop is also being considered, in order to avoid snow removal during the snowfall period in heavy snow areas, using the roof as a rooftop to collect snow. In order to collect snow, there is an increasing demand for standing fences around the roof of wooden buildings.

  Thus, when installing fence posts along the perimeter of a wooden building, the strength of the posts is required to be strong enough to prevent the posts from falling or falling even if people lean against them. If snow accumulates on the outside, it may fall after snowfall, so there is a new demand to place fence posts on the outside of the building as much as possible.

JP2013-67985A JP 09-317111 A

  Therefore, the present invention has been devised in view of the above-mentioned problems, and the object of the present invention is to have a strength that does not fall even when a person leans on the support, and can be adapted to the situation without changing the design. It is another object of the present invention to provide a strut mounting structure for a wooden flat roof that allows easy adjustment of the mounting position of the bolted plate and the strut and has a high degree of freedom in the strut mounting position.

  A support structure for a wooden land roof according to a first aspect of the present invention is secured to a base plate that is a base material of the land roof, and is bolted to a bolted plate on which a bolt is erected, and the bolt of the bolted plate. The plate with bolts is provided with a plurality of screw holes for screwing the base plate, and four bolts are erected at positions excluding the center of the plate. The column has a base plate that is bolted to the bolt and a column body that is erected on the base plate, and the column body has the four bolts at the center position in plan view. It is fixed to the flat roof via the plate with bolts by being attached to the base plate so as to be in a region surrounded by.

  According to a second aspect of the present invention, there is provided a support structure for supporting a wooden flat roof. In the first aspect, the center position of the support main body is shifted from the center position of the four bolts to one side of the bolted plate in plan view. It is characteristically installed.

  In the support structure for a wooden land roof according to a third aspect of the present invention, in the first aspect or the second aspect, the plurality of screw holes of the bolted plate are countersink holes in which countersunk portions for accommodating screw heads are formed. It is characterized by.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the bolted plate is installed on a waterproof sheet that prevents water leakage from the flat roof, and the base plate of the column and the bolted plate In between, a covering waterproof sheet made of the same material as the waterproof sheet for preventing water leakage from the screw hole is interposed.

  According to a fifth aspect of the present invention, in the third or fourth aspect, the plurality of screw holes are formed at four or more locations so as to surround each bolt of the four bolts. It is characterized by

  According to a sixth aspect of the present invention, in the fifth invention, the bolt-attached plate is further provided with one screw hole at a position along each side of the plate. Five screw holes are formed along one side.

  According to 1st invention-6th invention, it is fastened to the field board which is the base material of the said flat roof, the plate with the volt | bolt by which the volt | bolt was erected, and the support | pillar bolted to the said volt | bolt of this plate with a volt | bolt, In the bolted plate, a plurality of screw holes for screwing the base plate are drilled, and four bolts are erected at a position excluding the center of the plate, The column has a base plate that is bolted to the bolt and a column body that is erected on the base plate. The column body is surrounded by the four bolts in the plan view. Since it is fixed to the flat roof via the bolted plate by being attached to the base plate so as to be within the region, the strength design of the bolted plate Depending on the circumstances without redoing the it is easy to adjust the mounting position of the bolt with the plate and the support, a high degree of freedom in the mounting position of the strut. In addition, the bolted plate can be securely attached to the base plate as the support material by screwing the plurality of screw holes with wood screws or the like.

  In particular, according to the second invention, even if the column is a fence column, the bolted plate is disposed as far as possible on the outer periphery of the wooden building, and the outer side of the center position of the bolted plate. Support columns can be installed to maximize the use of the rooftops of wooden buildings.

  In particular, according to the third invention, the screw head does not pop out due to the counterbore, so that the top surface of the bolted plate becomes flat and the waterproof sheet is easy to stick, and the base plate of the column is stably and securely fixed. Can be attached.

  In particular, according to the fourth aspect of the invention, even when the waterproof layer is penetrated for attaching the bolted plate, the waterproof sheet can be reliably waterproofed.

  In particular, according to the fifth and sixth inventions, the bolts to which the rotational moment acts are screwed efficiently, so that even if a person leans on the column with the minimum number of screw holes, the bolt falls over. It is possible to ensure the strength that does not occur.

  In particular, according to the sixth aspect of the present invention, it is possible to provide a strut mounting structure for a wooden land roof having higher strength.

It is an elevation view which shows the case where the support | pillar of the support structure of the wooden land roof which concerns on embodiment of this invention is utilized as a support | pillar for fences of a mesh fence. It is a perspective view which shows the structure of the support | pillar mounting structure of the wooden land roof which concerns on 1st Embodiment of this invention. It is a perspective view which shows the plate with a bolt of a support | pillar mounting structure same as the above. It is drawing which shows a plate with a bolt same as the above, (a) is the front view which looked at the plate horizontally along a plate surface, (b) is the top view which looked at the plate in the direction orthogonal to a plate surface. . It is a perspective view which shows the support | pillar of the support | pillar mounting structure of FIG. 2 in the state which cut | disconnected the upper part. It is the top view which looked at the support | pillar same as the above in the direction orthogonal to the plate surface of a base. It is the front view which looked at the support | pillar same as the above along the board surface of a base horizontally. It is a top view which shows the modification from which the arrangement | positioning of the center position of a support | pillar same as the above differs. It is a perspective view which shows the support | pillar attachment structure of the wooden land roof which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the plate with a bolt of a support | pillar mounting structure same as the above. It is the top view which looked at the plate with a bolt same as the above in the direction orthogonal to a plate surface. FIGS. 9A and 9B are explanatory diagrams for explaining a difference in operating moment between the support column of FIG. 6 and the support column of FIG. 8, in which FIG. 6A shows the support column of FIG. 6 and FIG.

  Hereinafter, a support mounting structure for a wooden land roof according to an embodiment of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
As shown in FIGS. 1 to 8, as a support structure for a wooden flat roof according to the first embodiment of the present invention, the outer periphery of the wooden roof is provided so that it is not necessary to snow in a snowy season in a snowy region. A case where a fence post is erected in order to collect snow along is described.

  First, a brief description of wooden buildings will be given. A wooden building is not shown in the figure, but it is assumed to be a typical wooden two-story detached house constructed in a snowy area in Japan. Therefore, it is a building in which a mesh fence is stretched as a flat roof to prevent snowfall along its outer periphery. The flat roof refers to a substantially flat roof with a water gradient that is gentle enough to allow water to flow (for example, a gradient of about 1/30 to 1/60 in a wooden building).

  The support structure 1 for a wooden land roof according to the first embodiment is a support structure for attaching a mesh fence support as shown in FIG. 1 to the flat roof A of such a wooden building. As shown, a bolted plate 2 fixed to a flat roof A with screws, a covered waterproof sheet 3 coated on the bolted plate 2, and a bolted plate 2 fixed from above the covered waterproof sheet 3. The support post 4 and the like.

(Land roof)
As shown in FIG. 2, the flat roof A according to the present embodiment includes a field plate A <b> 1 made of a wood block (a wooden board) that is a base material of the roof, and a slag gypsum placed as an incombustible material on the field plate A <b> 1. It consists of A2, a galvanized steel sheet A3 which is a roof finishing material attached on the slag gypsum A2, and a waterproof sheet A4 adhered on the galvanized steel sheet A3.

  Of course, the slag gypsum A2, which is a non-combustible material on the flat roof A, can be omitted if there is no request in the Building Standard Act, such as when the construction site of the wooden building is not designated as a fire prevention area or a semi-fire prevention area. If necessary, a heat insulating material made of foamed resin such as foamed styrene board may be interposed between the base plate A1 and the slag gypsum A2.

  In addition, the zinc steel plate A3 is galvanized for rust prevention, but may be either a hot dip galvanized steel plate or an electrogalvanized steel plate, and other than zinc, such as a galvanium steel plate added with aluminum plating. It does not matter as a steel plate to which other metal plating is added. In addition, it is also possible to select a finishing material that is not a steel plate instead of the zinc steel plate A3.

  The waterproof sheet A4 according to the present embodiment is a waterproof sheet made of a soft vinyl chloride-based resin obtained by surface-treating the above-described galvanized steel sheet A3 and laminated on the galvanized steel sheet A3. Of course, the waterproof sheet according to the present invention may be a waterproof sheet made of other resin or asphalt. However, like the waterproof sheet A4 according to the present embodiment, the waterproof sheet is made of a soft vinyl chloride resin laminated on the galvanized steel sheet A3. If it is a waterproof sheet, while having moderate softness as a waterproof layer, it can provide on a wooden board | plate material without a base treatment, and is preferable.

(Plate with bolt)
As shown in FIGS. 2 and 3, the bolted plate 2 includes a rectangular plate main body 20 and four bolts 21 erected on the rectangular plate main body 20.

  As shown in FIGS. 3 and 4, the plate main body 20 is a 3 mm thick × 200 mm square plate material made of stainless steel plate (SUS304), and is transmitted from the column 4 fixed to the bolt 21. The four corners are rounded and chamfered so that the waterproof sheet A4 is not damaged by the moment. Of course, the plate main body 20 is not limited to the stainless steel plate as in the case of the galvanized steel plate A3 described above, and may be a galvanized steel plate or other metal plated steel plate.

  As shown in FIG. 4, the bolts 21 are made of stainless steel (SUS304) M12 bolts, are positions excluding the center of the plate body 20, equidistant from the center of the plate body 20, and the plate body 20. Four bolts are respectively crimped to the positions of the vertices of a square that is equidistant from each side (45 mm in this embodiment). Further, as shown in FIG. 4A, when the crimping is stopped, the bolt head is crushed so that the bolt 21 does not protrude so much from the back surface of the plate body 20.

  Of course, the bolt 21 may be fixed to the plate main body 20 by welding, but when the bolt 21 is fixed by welding, the bolt head of the bolt 21 protrudes from the back surface of the plate main body 20, and thus the support column 4 is supported via the waterproof sheet A4. It becomes unstable to do. On the other hand, like the bolt 21 according to the present embodiment, the support of the support column 4 by the bolted plate 2 becomes substantially surface contact and can be stably fixed and supported by crushing the bolt head and fastening it to the plate body 20. It is like that.

  Further, as shown in FIGS. 3 and 4 (b), the plate body 20 has a bolted plate 2 and a column 4 fixed to the bolted plate 2 supported and fixed to a base plate A1 as a base material. A plurality of screw holes 22 having a diameter of about 10 mm are formed.

  These plurality of screw holes 22 are all counterbore holes in which counterbore portions 22a for accommodating screw heads are formed (partial enlarged view shown in a broken-line circle in FIG. 3, FIG. 4A). (Refer to the broken line part of. Thus, since the screw head does not pop out, the upper surface of the bolted plate becomes flat, and not only the waterproof sheet A4 is easily attached, but also a base plate of the support column 4 described later can be stably and reliably fixed.

  As shown in FIGS. 3 and 4B, the plate body 20 according to the present embodiment has four screw holes 22 at regular intervals along the edges of the square sides. A total of five holes are drilled on each side, one near each end of the center, and four screw holes 22 are drilled inside the four bolts 21. In other words, since the screw holes 22 are common to adjacent sides of the plate body 20, the plate body 20 according to the present embodiment has a total of 20 screw holes 22 as shown in FIG. It has been drilled.

  For this reason, the plate body 20 according to the present embodiment is provided with four or more screw holes 22 so as to surround each bolt 21 (see FIG. 4B), and a rotational moment acts. Since the screws 21 are efficiently screwed to the bolts 21, no matter which direction the horizontal force is applied from when a person is leaned on the column 4 by the minimum number of screw holes 22 or due to an earthquake or typhoon, etc. It is possible to ensure the strength not to fall.

(Covered tarpaulin)
The covering waterproof sheet 3 is a waterproof sheet made of the same soft vinyl chloride resin as the above-described waterproof sheet A4. The cover sheet 3 is attached from above the plate 2 with bolts and bonded to the waterproof sheet A4, so that screw holes 22 are formed. It has a function to prevent water leakage. As shown in FIG. 2, because the welding allowance 3a for bonding to the waterproof sheet A4 has a width of 70 mm, the covering waterproof sheet 3 is a square having a size of about 340 mm square that is slightly larger than the plate body 20 described above. A bolt-shaped sheet 3 is formed, and a bolt hole 3b through which the four bolts 21 are inserted is also provided.

  As for this covering waterproof sheet 3, the welding allowance 3a is heat-welded by the warm air etc. to the waterproof sheet A4, and a waterproof layer is formed on the screw hole 22 of the plate 2 with a bolt (refer FIG. 2).

(Support)
As shown in FIGS. 5 to 7, the support column 4 is composed of a base plate 40 having a square shape similar to the plate main body 20 described above, and a support column body 41 vertically attached to the plate surface of the base plate 40. As shown in FIG. 1, it is a support for a mesh fence to which a mesh panel formed into a mesh shape from a galvanized iron wire or the like is attached.

  The base plate 40 is a 200 mm square plate member made of general structural steel and having a thickness of about 10 mm. The base plate 40 is used for inserting and bolting the four bolts 21 of the bolted plate 2. A bolt hole 42 having a diameter of 14 mm is formed (see FIG. 6 and the like). Since this base plate 40 is firmly bolted to the bolted plate 2 with four bolts 21, unlike the plate body 20, the four corners are not chamfered.

  The column main body 41 is a square pipe of 50 mm square made of a general structural square steel pipe, and a resin cap 43 is fitted to the upper end (see FIGS. 6 and 7). Then, as shown in FIG. 6, the column core 41 (square pipe) is welded to the base plate 40 so that the shaft core (center position of the column) overlaps the center position of the base plate 40.

  In addition, although the support | pillar main body illustrated the support | pillar which consists of a square pipe as a support | pillar which concerns on this embodiment, this invention is applicable also to the support | pillar by which the round pipe was erected on the base plate, The present invention can also be applied to a column-type main body like a column. In such a case, the center position of the support column is the centroid of the cross section perpendicular to the longitudinal direction (axial direction) of the support column body.

  Further, as shown in FIG. 8 as a column 4 ′ which is a modified example of the column 4, the column body 41 is not attached at the center position of the base plate 40 (the center position of the four bolts 21) but on the outer periphery of the land roof A. It may be installed eccentrically on one side of the bolted plate 2 on the side (outside). By arranging in this way, it becomes possible not only to be able to arrange the column main body 41 and the fence panel outside as much as possible in a state where the support can be supported, and to make the most of the roof of the wooden building. Almost all the snow accumulated on the roof of a wooden building can be stored in the fence panel, and dangerous snowfall from the roof can be prevented.

  On the other hand, in the case of supporting with a conventional single bolt such as the gantry support structure described in Patent Document 1, it is necessary to insert a part between the end plate of the support column and the bolt. Not only is the practicality low because the height position, and hence the fence position, is high, but for horizontal loads, the bending moment acts on the parts and bolts, making it difficult to transmit the load and making it eccentric in the specifications. Is difficult. That is, in the case of supporting with a single bolt like the conventional frame support structure described in Patent Document 1, if a horizontal load is applied to the column, it acts as a bending moment on the bolt. If it is decentered, the bending moment will increase, and the structural design itself will start over.

  On the other hand, FIG. 12 shows a case where the column body 41 is eccentric to the bolt position as in the column 4 ′ according to the modification of the present invention. In FIG. 12, the horizontal white arrow represents the horizontal load applied to the column, the upward black arrow represents the tensile force acting on the bolt, and the upward white arrow represents the pulling force acting on the screw. The nut to be shown is omitted. As shown in FIG. 12, the moment that the compression side can bear is about 1/4 or less, the moment that the tension side bears increases, and the acting moment on the tension side increases by about 80%. However, in the present invention, unlike the conventional structure supported by one bolt, there is no need to interpose parts between the bolts, and the bolted plate 2 is integrated with the bolt, so that all the plates have a cross section. It can be assumed that the holding state is widened, and the stress distribution of the screw spreads. As a result, when the column main body 41 is eccentric to the bolt position like the column 4 ', the bending strength on the tension side increases by about 100%, and the tension side bears. It can fully counter the increase in moment. In addition, the screw on the compression side of the plate is also effective, and the contribution on the compression side can be calculated as countering the increased bending moment.

  Further, since the column main body 41 and the base plate 40 are joined by welding, it is easy to adjust the position where the column main body 41 is attached to the base plate 40. As will be described later, the column main body 41 is hung on the bolt hole 42. It is possible to join so that the center position of the column main body 41 comes within a square range connecting the centers of the four bolt holes 42 on the condition that there is no. For this reason, it is easy to adjust the mounting position of the column 4 on the bolted plate 2 according to the situation without redesigning the strength of the bolted plate 2 and the degree of freedom of the mounting position of the column 4 is high.

  As shown in FIG. 7, four metal holes 44 for attaching fixing metal parts for fixing the mesh fence panel are formed in the front surface of the column main body 41 at a predetermined height.

  The column 4 described above is bolted with the bolts 42 of the base plate 40 through which the four bolts 21 of the bolted plate 2 are inserted and tightened with a double nut via a spring washer so as not to loosen over time. It is bolted to the plate 2.

  In addition, when the support | pillar 4 is installed directly on the covering waterproof sheet 3, since there is a possibility that the covering waterproof sheet 3 may be broken and damaged, it is not shown, but is made of a rubber elastic body as a protective member for the covering waterproof sheet 3. It is desirable to put rubber packing, a washer plate or the like between the waterproof sheet 3 and the support column 4.

(Operational effect of the support structure of the wooden flat roof according to the first embodiment)
According to the support structure 1 for a wooden land roof according to the first embodiment described above, the four bolts 21 are erected on the plate 2 with the bolts, and the base plate 40 of the support column 4 is the four of these four. It is fixed to the bolt 21. For this reason, even if a horizontal force acts near the upper end of the support column 4 due to a person leaning on it, it is countered by the tensile force of the two bolts inside the bolted plate 2 and the two outer bolts. Since the compression force of the back surface of the fixed plate body 20 can be countered, even when a person leans against the support column 4 or the fence panel, the support column 4 can exhibit a sufficient strength to prevent it from falling.

  On the other hand, as shown in the background art, when only one bolt is erected at the center position of the plate body, the rotational moment caused by the horizontal force acting near the upper end of the column remains unchanged. Since it is transmitted as bending stress that bends the base of the bolt, it is necessary to increase the diameter of the bolt in order to be able to counter these stresses, and distortion is caused by repeated action of the bending stress on the base of the bolt. There is a problem that metal is liable to accumulate and cause metal fatigue. In addition, when the bolt is erected at the center position of the plate main body, there is a problem that the column and the bolt interfere with each other, for example, the column main body interferes with the screwing operation of the nut.

  In addition, if only one bolt is erected at the center of the plate body, the rotational moment caused by the horizontal force acting near the upper end of the column is directly transmitted as bending stress that bends the base of the bolt. Therefore, the column main body cannot be arranged outside the center position of the base plate.

  In addition, the bolted plate 2 of the wooden roof-top support structure 1 has four bolts 21 standing at a position excluding the center of the plate body 20, and the support pillar 4 has its center position (support body). 41) is installed so as to be within a rectangular range that is an area surrounded by four bolts 21 in a plan view. Accordingly, it is easy to adjust the mounting position of the bolted plate 2 and the column 4 and the degree of freedom of the mounting position of the column body 41 is high.

[Second Embodiment]
Next, with reference to FIGS. 9 to 11, a support structure 1 ′ for a wooden land roof according to a second embodiment of the present invention will be described. The difference between the support structure 1 ′ for a wooden land roof according to the second embodiment and the support structure 1 for a wooden land roof according to the first embodiment is that the plate body 20 of the plate 2 with bolts is perforated. Since only the number and position of the screw holes 22 are present, this point will be mainly described. The same components are denoted by the same reference numerals, and description thereof will be omitted.

  As shown in FIG. 9, the support structure 1 ′ for the wooden land roof according to the second embodiment is similar to the support structure 1 described above, and the bolted plate 2 ′ fixed to the land roof A with screws, and this bolt. The covering waterproof sheet 3 covered on the cover plate 2 ′ and the support column 4 fixed to the plate 2 with bolts from above the cover waterproof sheet 3.

(Plate with bolt)
As shown in FIGS. 10 and 11, the bolted plate 2 ′ is composed of a rectangular plate body 20 ′ and the above-described four bolts 21 erected on the rectangular plate body 20 ′. ing.

  This plate main body 20 ′ is a 3 mm thick × 200 mm square plate material made of stainless steel plate (SUS304), and the four corners are rounded and chamfered in the same manner as the plate main body 20 described above. The bolt 21 is also crimped at the same position as the bolted plate 2.

  The plate body 20 ′ has four screw holes 22 formed at equal intervals along the edge of each side of the square, as shown in FIGS. Four screw holes 22 are formed inside the bolt 21. That is, a total of 16 screw holes 22 are formed in the plate body 20 ′ according to the present embodiment. The screw hole 22 is also a countersink hole in which a countersink portion 22a is formed.

  That is, the plate body 20 ′ of the bolted plate 2 ′ according to the present embodiment has four screw holes provided near the center of each side of the plate body 20 compared to the plate body 20 according to the first embodiment. Screw holes are reduced by that amount.

  However, the plate body 20 ′ is also provided with four or more screw holes 22 so as to surround each bolt 21 as in the case of the plate body 20 according to the first embodiment. FIG. 11). For this reason, similarly to the plate main body 20 according to the first embodiment, the screws 21 are efficiently screwed to the bolts 21 on which the rotational moment acts. It is possible to secure a strength that does not cause a fall even when a horizontal force is applied from any direction in the case of leaning, earthquake or typhoon.

(Effects of the wooden flat roof support structure according to the second embodiment)
According to the support structure 1 ′ for a wooden land roof according to the second embodiment, in addition to the same effects as the support structure 1 according to the first embodiment, the support 4 can be used even when a person leans against the support 4 or the fence panel. In addition to maintaining sufficient strength to prevent falling and the degree of freedom of the mounting position of the column body 41, the processing cost of the screw hole of the bolted plate 2 'is reduced, and the installation cost related to the column mounting structure 1' is reduced. be able to.

[Procedure for mounting structure of support]
Next, the construction procedure of the support structure 1 for a wooden land roof according to the first embodiment and the support structure 1 'for a wooden land roof according to the second embodiment will be described.

(1) Construction of flat roof First, the flat roof A of the above-mentioned wooden building is constructed. In the same way as a general wooden construction method, the base plate A1 which is the base material of the roof is pasted, and the slag gypsum A2 which is a noncombustible material and the galvanized steel plate A3 which is a finishing material are laminated on the pasted base plate A1 Waterproof work is performed on the top and a waterproof sheet A4 is attached.

  When external heat insulation is performed on the flat roof A, a foamed resin foam, which is a heat insulating material, is pasted on the base plate A1, then slag gypsum A2 and galvanized steel sheet A3 are laminated, and waterproofing is performed thereon to perform waterproofing. A sheet A4 is pasted.

(2) Installation of plate with bolt Next, on the waterproof sheet A4, marking is performed to determine the exact position of the plate 2 with bolt or the plate 2 'with bolt, and the plate 2 with bolt according to the position. Alternatively, a bolted plate 2 ′ is installed.

(3) Screwing of the plate with bolts Next, the ground plate of the flat roof A by screwing wooden screws into all the screw holes 22 while taking care not to shift the position of the plate 2 with bolts or the plate 2 'with bolts. Fasten to A1. At this time, the length of the wood screw is selected in consideration of the thickness of the slag gypsum A2, the galvanized steel plate A3, and the field plate A1, and the wood screw of a predetermined depth is screwed into the field plate A1 to ensure the field plate A1. The bolted plate 2 or the bolted plate 2 'can be screwed.

(4) Covering waterproof sheet 3 Next, the covering waterproof sheet 3 is covered on the plate 2 with bolt or the plate 2 'with bolt, and the waterproof sheet 3 is covered from the surface side with a warm air blower from which hot air blows out. The allowance 3a is heated and the welding allowance 3a part is heat-welded to the waterproof sheet A4.

(5) Installation of protective member Next, two rubber packings are installed on the covering waterproof sheet 3, and a thin washer plate having the same shape as the base plate 40 is installed thereon.

(6) Installation of support column Next, the bolt hole 42 of the support column 4 is inserted into the four bolts 21 of the bolted plate 2 or the bolted plate 2 ′ protruding from the washer plate, and a spring washer is interposed between the bolt 21. The nuts to be screwed together are tightened two by two, and the bolted plate 2 or the bolted plate 2 ′ is fastened to the bolt 21 with a double nut so as not to loosen. Thereby, the construction of the support mounting structure 1 or the support mounting structure 1 ′ is completed.

  According to the support structure for a wooden land roof according to the first embodiment and the second embodiment of the present invention according to such a construction procedure, the waterproof sheet 3 is covered and welded to the portion penetrating the waterproof sheet A4. Construction is possible without deteriorating waterproofness not only when a new building is installed, but also when a column such as a fence column is attached to the roof of an existing building.

  As described above, the support structure for supporting a wooden land roof according to the first embodiment and the second embodiment of the present invention has been described in detail. However, each of the above-described or illustrated embodiments is embodied in carrying out the present invention. The embodiments are merely shown, and the technical scope of the present invention should not be construed as being limited thereto. In particular, it goes without saying that the screw holes, bolt diameters, plate thicknesses, and the like can be appropriately designed and modified according to the design strength of the columns and the roof.

DESCRIPTION OF SYMBOLS 1,1 ': Support | pillar mounting structure 2,2': Plate 20 with bolt, 20 ': Plate main body 21: Bolt 22: Screw hole 22a: Countersink part 3: Cover waterproof sheet 3a: Welding allowance 3b: Bolt hole 4, 4 ': support 40: base plate 41: support body 42: bolt hole 43: cap 44: metal fitting hole A: flat roof A1: field plate (base material)
A2: Slab gypsum (non-combustible material)
A3: Zinc steel plate A4: Waterproof sheet

Claims (6)

It is a support structure for a wooden flat roof,
A bolted plate that is fastened to a base plate that is a base material of the flat roof, and a bolt is erected, and a column that is bolted to the bolt of the bolted plate,
The bolted plate has a plurality of screw holes for screwing the base plate, and four bolts are erected at positions excluding the center of the plate,
The support column has a base plate bolted to the bolt, and a support column body standing on the base plate,
The column main body is fixed to the flat roof via the bolted plate by being attached to the base plate so that the center position thereof is in the region surrounded by the four bolts in plan view. This is a support structure for a wooden flat roof. The wooden land roof according to claim 1, wherein the column main body is installed eccentrically from the center position of the four bolts to one side of the bolted plate in a plan view. The support mounting structure. 3. The support structure for a wooden land roof according to claim 1, wherein the plurality of screw holes of the bolted plate are countersinks each having a countersink portion for accommodating a screw head. The bolted plate is installed on a waterproof sheet that prevents water leakage from the flat roof,
The covering waterproof sheet of the same material as the waterproof sheet for preventing water leakage from the screw hole is interposed between the base plate of the support column and the plate with bolts. The support structure of the wooden flat roof described. 5. The support structure for a wooden land roof according to claim 3, wherein the plurality of screw holes are formed at four or more locations so as to surround each of the four bolts. The plate with bolts is further provided with one screw hole at a position along each side of the plate, and five screw holes are formed along each side of the plate. The support structure for a wooden land roof according to claim 5.

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