JP2017186857A - Building roof structure and construction method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof structure capable of suppressing increase in transport cost and ensuring wider indoor space.SOLUTION: A roof structure of a building has multiple connection units 40. The connection units 40 each are formed by connecting a pair of truss units 41, 42, which have substantially rectangular parallelepiped shape, and are disposed vertically adjacent to each other. The connection units 40 each are horizontally disposed above a building body 20 so as to bridge between a pair of external wall parts 21a, 21b of the building body 20. The connection units 40 each are disposed away from each other, forming a unit uninstalled space between the connection units 40. A truss frame having a truss structure is disposed in the unit uninstalled space.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a roof structure of a building and a construction method of the building roof structure.

  In general, buildings for various stores represented by convenience stores are required to have a uniform structure and shorten the construction period. In order to meet the demand, the building body and the roof are divided into building components such as a plurality of units. Building components are manufactured in advance in a factory, transported to a building site using a transportation means such as a truck, and assembled at the building site.

  When transporting building components, transportation restrictions are imposed on the dimensions of building components by various laws and regulations. For example, since the roof units constituting the roof portion each have a substantially rectangular shape, the longitudinal dimension must be within a range that can be loaded on a loading platform such as a truck. Therefore, in the case of a roof structure in which a plurality of roof units are provided side by side in a row, the depth dimension of the building cannot be longer than the longitudinal dimension of the roof unit that can be loaded on a truck or the like.

  Then, the roof structure of the building provided with the depth dimension longer than the longitudinal dimension of a roof unit by devising the arrangement configuration of a roof unit is proposed. As an example, the roof unit is composed of two units, a front unit and a back unit, the front units are arranged side by side along the long sides, and the longitudinal direction of the back unit is along the width direction of the building. There is a roof structure arranged side by side (see, for example, Patent Document 1). Thereby, the depth dimension of a building is expanded by the short side dimension of the back unit.

  However, in the roof structure described in Patent Document 1, a pillar and an inner wall part for supporting the roof structure are provided at a boundary portion between the front unit and the back unit, and this exists in the indoor space. For this reason, even if the depth dimension is expanded, a wider indoor space cannot be secured. Then, the inventor of this application proposed the roof structure which further devised how to arrange a front unit and a back unit. This is a way of aligning the longitudinal direction of the front unit and the back unit and arranging a plurality of long side sides next to each other. When building a building, build a roof structure while providing temporary columns at the boundary between the front unit and the back unit, and connect the units to remove the temporary columns before the presence of columns and inner walls in the indoor space. It is possible to form a state that does not.

JP 2014-105458 A

  By the way, in the proposed roof structure, the same number of front units and back units are installed. Therefore, compared with the roof structure described in Patent Document 1, the number of units is greatly increased. As described above, since the roof unit is transported to the construction site by a truck or the like, an increase in the number of units leads to an increase in transportation cost. As a result, with the newly proposed roof structure, there is a concern that even if a wider indoor space is secured, the transportation cost increases.

  Then, in view of the above circumstances, the main object of the present invention is to obtain a roof structure of a building that can secure a wider indoor space while suppressing an increase in transportation cost. In addition, an object is to obtain a construction method for constructing such a roof structure.

  In order to solve the above-mentioned problem, in the first invention, the truss unit is composed of a pair of truss units each having a substantially rectangular parallelepiped shape, and both truss units are connected in a row in a row, and the plurality of the connection units. Is a roof structure of a building which is arranged side by side above the building main body and is installed between a pair of outer wall portions of the building main body, and is connected to the connecting unit above the building main body. A unit non-installation space in which the connection unit is not installed, and a plurality of units provided in the longitudinal direction of the connection unit in the unit non-installation space, and connected to the connection unit adjacent to the unit non-installation space. And a truss frame.

  According to the first invention, by sufficiently securing the strength at the connecting portion between the truss units, the pillar and the inner wall portion supporting the connecting portion become unnecessary, and a wide indoor space can be secured in the building body. In addition, since the unit non-installation space is provided adjacent to the connection unit, when the width and depth of the building body are widened, the number of connection units, and therefore, compared to the case where the entire roof structure is configured with connection units, An increase in the number of truss units can be suppressed. Thereby, the increase in the transportation cost of a truss unit can be suppressed. A plurality of truss frames are provided in the unit non-installation space, and the truss frame is connected to an adjacent connecting unit so that the entire roof structure is formed into a truss structure. Thereby, even if it has a unit non-installation space, the intensity | strength of a roof part is securable. Therefore, it is possible to secure the strength of the roof and a wider indoor space while suppressing an increase in transportation cost.

  In a second invention, in the first invention, the building main body has a substantially quadrangular shape in a plan view, and at least the connection units are installed at both ends of the building main body in the arrangement direction of the connection units. It is characterized by that.

  According to 2nd invention, when constructing a roof part using a connection unit, when it is made to install a connection unit in the both ends of a row direction first, the upper part of a building body is the connection unit at the both ends. It is firmly fixed by the truss structure. Thereby, the construction work of the subsequent roof part can be performed in a stable state.

  In a third invention, in the first or second invention, the unit non-installation space is provided between the adjacent connection units, and the width dimension of the unit non-installation space in the direction in which the connection units are arranged is It is the same along the longitudinal direction of the connecting unit.

  According to 3rd invention, the roof part which makes a rectangular shape as a whole is formed using a some connection unit and the unit non-installation space pinched | interposed between adjacent connection units. In this case, if the number of connected units and the width dimension of the unit non-installation space are adjusted, the width dimension of the roof part can be freely changed, and the roof part corresponding to the size of the building body is formed. The degree of freedom can be increased.

  According to a fourth invention, in the third invention, a plurality of the unit non-installation spaces are provided, and the width dimension of each unit non-installation space is set at equal intervals.

  According to the fourth invention, since the dimensions of the truss frame provided in each unit non-installation space are made common, the versatility of the truss frame is enhanced and the installation operation of the truss frame can be easily performed. In addition, it is not necessary to manufacture a truss frame that fits the unit non-installation space having various dimensions, so that an increase in manufacturing cost can be suppressed and the truss frame can be easily transported.

  In a fifth invention, in any one of the first to fourth inventions, the connecting unit is provided with a water gradient along a longitudinal direction thereof, and the plurality of truss frames are provided in the unit non-installation space. The height dimensions are different from each other so that the same inclination as the water gradient is formed.

  According to the fifth aspect, since the water gradient similar to that of the connecting unit is formed also by the truss frame provided in the unit non-installation space, it is possible to align the inclination of the water gradient in the entire roof portion. Thereby, when installing a roof panel on a connection unit and a unit non-installation space, it can suppress that the installation structure becomes complicated.

  According to a sixth aspect, in the fifth aspect, in the connection unit, the longitudinal length of the truss unit that is above the water gradient is greater than the longitudinal length of the truss unit that is below the water gradient. Is also small.

  According to the sixth invention, one of the pair of truss units constituting the connecting unit is formed to be shorter than the other. When the truss unit is transported by a transportation means such as a truck, it is possible to load more truss units having a small length, so that an increase in transportation cost can be further suppressed.

  In a seventh invention, in any one of the first to sixth inventions, the pair of truss units includes a front truss unit provided on the front side of the building and a back truss provided on the back side of the building relative to the front truss unit. The truss frame is between the front ends of the front truss unit, between the connecting portions of the front truss unit and the back truss unit, between the rear ends of the back truss unit, It is provided in.

  According to the seventh aspect, in the unit non-installation space, truss frames are respectively installed at least between the front end portions of the front truss unit, between the connecting portions of the truss unit, and between the rear end portions of the back truss unit. The Thereby, the whole unit non-installation space is made into a truss structure while using the connecting unit, and the strength of the roof portion can be secured.

  In an eighth aspect of the invention, a first step of connecting a pair of truss units having a substantially rectangular parallelepiped shape on the ground so as to be in a line in a vertical row to form a connecting unit, and installing the connecting unit above the building body. A second step, and in the second step, another new connection unit is removed from the already-connected connection unit in a state where at least one of the connection units is installed above the building body. Including a step of installing a unit non-installation space so as to form a unit non-installation space between the connection unit and the installed connection unit, and providing a truss frame in the unit non-installation space, And a third step of connecting the truss frames, and a construction method of the building roof structure.

  According to the eighth invention, the roof structures of the first to seventh inventions can be suitably constructed. In addition, since the work of connecting a pair of truss units to make a connecting unit is performed on the ground of the construction site, the roof part with a long depth is constructed while setting the dimensions of the truss unit within the limits of transportation. can do. Moreover, because of the connection work on the ground, it is easier to work than the connection work on the building body.

  According to a ninth invention, in the eighth invention, the building main body has a substantially quadrangular shape in a plan view, and in the second step, the connecting unit that is first installed above the building main body is the connecting unit. The connecting unit is installed at one end in the arrangement direction, and the connecting unit subsequent thereto is installed at the other end opposite to the one end.

  According to the ninth aspect, when the connecting unit is installed above the building main body, the first connecting unit and the subsequent connecting unit are installed in the building main body. First, a connecting unit is provided. Thereby, since the upper part of a building main body is firmly fixed by the truss structure of a connection unit in the said both ends, the construction work of a subsequent roof structure can be performed in the stable state.

The perspective view which shows the whole building outline. It is a top view of a building, (a) shows the outer wall part of a building body, and (b) shows the roof structure of a roof part. The perspective view which shows the arrangement configuration of a connection unit. The perspective view which shows a part of roof structure. The perspective view which shows the state by which a roof panel is installed on a roof structure. The side view which expands and shows the connection part of truss units. Schematic which shows the outline of the part which roof panels adjoined. The top view which shows another example from which arrangement | positioning of a truss frame differs. The top view which shows another example from which arrangement | positioning of a connection unit differs. The top view which shows another example from which arrangement | positioning of a connection unit differs. The top view which shows another example from which arrangement | positioning of a connection unit differs.

  Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In the present embodiment, the roof structure of a building according to the present invention is embodied as a building used as a store of a convenience store.

  First, an overview of the entire building 10 will be described with reference to FIGS. 1 and 2A. As shown in FIG. 1, the building 10 includes a building main body 20 provided on the foundation 11 and a roof portion 30 provided above the building main body 20. The building body 20 has a rectangular shape in plan view, and is divided into an indoor and an outdoor space by an outer wall portion 21. On the other hand, the roof portion 30 is configured to have a truss structure, and is a single-flow inclined roof that descends from the front side of the building toward the back side. In FIG. 1, the left side of the figure corresponds to the front side of the building (front side), and the opposite side corresponds to the back side of the building (rear side). Below, this front and rear are made into the depth direction, and the direction orthogonal to it is demonstrated as the width direction or the left-right direction.

  In the building body 20, the outer wall portion 21 includes a plurality of columns 22 and 23 erected on the foundation 11 as shown in FIG. These columns 22 and 23 support the roof portion 30 from below. As the pillars 22 and 23, there are a lattice pillar 22 disposed side by side along the outer wall portion 21, and a spacer pillar 23 disposed between the lattice pillars 22 (see FIG. 1). The lattice columns 22 and the inter-columns 23 are wall-attached columns that are integrated with the outer wall portion 21, and are provided along the outer wall portion 21. The outer wall 21 is provided with an entrance 24 that communicates the inside and outside of the building 10 on the front side.

  The building body 20 has an indoor space 25 as a space surrounded by the outer wall portion 21. The indoor space 25 is one large space formed by the entire space surrounded by the outer wall portion 21. The large space is used to provide a space necessary for the store, such as a sales space for selling products and a backyard space for warehouses and offices. A person such as a customer or a store clerk enters and exits the indoor space 25 from the outside through the entrance / exit 24 provided in the outer wall portion 21.

  Returning to FIG. 1, the roof portion 30 is provided over the entire upper area of the building body 20 and has a portion protruding forward from the front side. This protruding portion is a flange 30a. The roof part 30 includes a roof structure 31 and a roof panel part 32. The roof structure 31 has a truss structure, and a roof panel portion 32 is provided thereon. The roof portion 30 is configured by being provided with various members such as an exterior material and a waterproofing member in addition to the roof structure 31 and the roof panel portion 32. Hereinafter, the roof structure of the building 10 is a roof. The structure 31 and the roof panel part 32 will be described in detail.

  First, the roof structure 31 will be described with reference to FIGS. In FIG. 2B, the alternate long and short dash line indicates the center line in the thickness direction of the outer wall portion 21 of the building body 20. As shown in FIG. 2B, the roof structure 31 includes a connecting unit 40 and truss frames 61 to 66. A plurality of (in this embodiment, four) connecting units 40 are provided, and each connecting unit 40 and the truss frames 61 to 66 are combined to form a roof structure having a truss structure as a whole as shown in FIG. 31 is configured.

  Referring also to FIG. 3, each connecting unit 40 has a substantially rectangular parallelepiped shape as a whole, and a water gradient is provided along the longitudinal direction thereof. Each connecting unit 40 is installed above the building body 20 such that the longitudinal direction is the depth direction and the water gradient is directed from the front of the building to the back side. The length dimension in the longitudinal direction of each connecting unit 40 is set to be substantially the same as or longer than the length dimension of the building body 20 in the depth direction. Each connecting unit 40 is bridged between a pair of outer wall portions 21 a and 21 b that face each other in the depth direction of the building body 20.

  Each connecting unit 40 is provided so as to be parallel in the width direction, and is provided in a separated state with a space between other connecting units 40 adjacent thereto. The interval in this case is set to be the same as the width dimension W1 of the connecting unit 40. By providing the interval, a unit non-installation space K is provided between the connecting units 40. The unit non-installation space K has the same width dimension W2 as the width dimension W1 of the connection unit 40, and the width dimension W2 is the same along the longitudinal direction of the connection unit 40. The width dimension W1 of the connection unit 40 is set so that the sum of the width dimensions W1 and W2 of the four connection units 40 and the three unit non-installation spaces K is the same as the width dimension of the building body 20.

  The connection unit 40 is classified into a first connection unit 40a and a second connection unit 40b. The 1st connection unit 40a is provided in the right end of the building main body 20, and refers to what has the side part above the outer wall part 21c in the width direction right side among the outer wall parts 21 of the building main body 20. FIG. The longitudinal dimension of the first connection unit 40 a is set to be substantially the same as the depth dimension of the building body 20. Therefore, the front end portion of the first connection unit 40a is placed on the front outer wall portion 21a, and the rear end portion is placed on the rear outer wall portion 21b.

  The 2nd connection unit 40b points out the thing provided in parts other than the right end of the building main body 20. FIG. Among them, the second connecting unit 40b provided at the left end of the building main body 20 has a side portion placed on the outer wall portion 21d on the left side in the width direction in the outer wall portion 21 of the building main body 20. The longitudinal dimension of the second connection unit 40 b is set longer than the depth dimension of the building body 20. For this reason, the second connecting unit 40b has a portion on the back side from the front end thereof placed on the front outer wall portion 21a, and a rear end portion placed on the rear outer wall portion 21b.

  Each connecting unit 40 is configured by connecting a front truss unit 41 and a back truss unit 42. Each truss unit 41, 42 has a substantially rectangular parallelepiped shape. The front truss unit 41 is disposed on the building front side of the connecting unit 40, and the upper surface thereof is inclined so as to descend from the front toward the back side. The front truss unit 41 is disposed on the upper side of the water gradient of the connecting unit 40. Among the front truss units 41, the front truss unit 41b that constitutes the second connection unit 40b has a length that extends forward from the front truss unit 41a of the first connection unit 40a. For this reason, the longitudinal dimension of the second connection unit 40b is longer than that of the first connection unit 40a.

  The back truss unit 42 has a longer longitudinal dimension than the front truss unit 41. The rear truss unit 42 is arranged on the back side of the front truss unit 41 so as to be arranged in a line vertically, and is a connecting member provided at a necessary strength point such as a connecting plate 43 provided on the side surface portion. Are connected to the front truss unit 41 (see FIG. 6). In this case, the lower surface of each truss unit 41 and 42 is connected so that it may become the same plane. The upper surface of the back truss unit 42 is inclined so as to descend from the front toward the back along the longitudinal direction. The back truss unit 42 is disposed below the water gradient of the connecting unit 40.

  As shown in FIG. 4, the front truss unit 41 has a long-side truss 51 and a short-side truss 52, and a plurality of them are combined. The back truss unit 42 also has a long side truss 53 and a short side truss 54, and a plurality of them are combined. The long side trusses 51 and 53 constitute both side portions of the truss units 41 and 42. The short-side trusses 52 and 54 are respectively provided between the long-side trusses 51 and 53 at the front end portion and the rear end portion of the truss units 41 and 42, and between the front and rear end portions depending on the necessity of securing the strength. One or more are provided.

  The long-side trusses 51 and 53 and the short-side trusses 52 and 54 are constituted by an upper chord member 55, a lower chord member 56, an oblique member 57, and a vertical member 58, each of which is made of channel steel. The upper chord material 55 of the long side trusses 51 and 53 is inclined so as to descend from the front toward the back side. The upper chord members 55 of the short side trusses 52 and 54 and the lower chord members 56 of the long side trusses 51 and 53 and the short side trusses 52 and 54 extend in the horizontal direction. The diagonal material 57 and the vertical material 58 connect the upper chord material 55 and the lower chord material 56. As shown in FIG. 6, the connecting plate 43 that connects the front truss unit 41 and the back truss unit 42 is fixed to a vertical member 58 that is lined up and down at the portion where both truss units 41 and 42 are abutted with each other with bolts. The vertical members 58 are connected to each other.

  Next, the configuration of the unit non-installation space K provided between the connecting units 40 will be described. As shown in FIG. 2B, the unit non-installation space K is classified into a first unit non-installation space K1 and a second unit non-installation space K2. The first unit non-installation space K1 indicates the right end of the three unit non-installation spaces K, and exists between the first connection unit 40a and the second connection unit 40b. The second unit non-installation space K2 refers to a space other than the first unit non-installation space K1 among the three unit non-installation spaces K, and exists between the second connection units 40b.

  In these unit non-installation spaces K, a plurality of truss frames 61 to 66 are provided. The truss frames 61 to 66 have the same configuration as the short side truss 52 described above. Specifically, as shown in FIG. 4, the upper chord member 71, the lower chord member 72, the diagonal member 73, and the vertical member 74 are formed in a square frame shape. As shown in FIGS. 2B and 4, as the truss frames 61 to 66, the first truss frame 61, the second truss frame 62, the third truss frame 63, and the fourth truss frame are provided for each installation location. 64, a fifth truss frame 65 and a sixth truss frame 66.

  The first truss frame 61 is provided on the forefront of the second unit non-installation space K2. The width dimension of the first truss frame 61 is slightly smaller than the width dimension W2 of the second unit non-installation space K2, and the height dimension is set to be the same as the short-side truss 52 at the front end of the front truss unit 41. . The first truss frame 61 is provided in a row with adjacent short-side trusses 52 and connected to the short-side trusses 52.

  The second truss frame 62 is provided between the connecting portions of the front truss unit 41 and the back truss unit 42 in the unit non-installation space K. The width dimension of the second truss frame 62 is slightly smaller than the width dimension W2 of the unit non-installation space K, and the height dimension is set to be the same as the short side truss 52 at the rear end of the front truss unit 41. The second truss frame 62 is provided in a row with the short-side truss 52 and is connected to the short-side truss 52.

  The third truss frame 63 is provided at the rear end of the unit non-installation space K. The width dimension of the third truss frame 63 is slightly smaller than the width dimension W2 of the unit non-installation space K, and the height dimension is set to be the same as the short side truss 54 at the rear end of the back truss unit 42. The third truss frame 63 is installed in line with the short side truss 52 and is connected to the short side truss 54.

  The fourth truss frame 64 to the sixth truss frame 66 are provided in front of the second truss frame 62 in the first unit non-installation space K1. First, the fourth truss frame 64 is provided along the longitudinal direction of the connecting unit 40 at the center in the width direction of the first unit non-installation space K1. The rear end portion of the fourth truss frame 64 is connected to the second truss frame 62, and the front end portion extends to the front end of the second connection unit 40b. The upper chord member 71 included in the fourth truss frame 64 is inclined in the same manner as the upper chord member 55 of the front truss unit 41.

  The fifth truss frame 65 is provided between the front end portion of the fourth truss frame 64 and the front end portion of the second connection unit 40b in a state orthogonal to the fourth truss frame 64. The width dimension of the fifth truss frame 65 is slightly smaller than the width dimension between the fourth truss frame 64 and the second connection unit 40b, and the height dimension is the short side truss 52 at the front end of the second connection unit 40b. Is set to the same. The fifth truss frame 65 is provided in a row with the short-side truss 52 and is connected to the short-side truss 52 and the fourth truss frame 64.

  The sixth truss frame 66 is provided in a state orthogonal to the fourth truss frame 64 between the fourth truss frame 64 and the front end portion of the first connection unit 40a. The width dimension of the sixth truss frame 66 is slightly smaller than the width dimension between the fourth truss frame 64 and the first connection unit 40a, and the height dimension is the short side truss 52 at the front end of the first connection unit 40a. Is set to the same. The sixth truss frame 66 is provided in a row with the short side truss 52, and is connected to the short side truss 52 and the fourth truss frame 64.

  As described above, the roof structure 31 of the building 10 includes a plurality of connecting units 40 separated from each other, and a plurality of truss frames 61 to 66 provided in the unit non-installation space K formed by the separation. A truss structure is built throughout. And each truss frame 61-66 changes the height dimension according to the location installed, or inclines the upper chord material 71. Thereby, also in the unit non-installation space K, the inclination similar to the inclination which the upper surface of the connection unit 40 has is formed by each truss frame 61-66. This slope becomes a water gradient. Incidentally, in the roof structure 31, the flange portion 30 a of the roof portion 30 is formed by the portion where the second connecting unit 40 b protrudes forward from the building body 20 and the third truss frame 63 to the fifth truss frame 65. Has been.

  Next, the roof panel portion 32 that constitutes the roof portion 30 together with the roof structure 31 will be described with reference to FIGS. 5 to 7. First, as shown in FIG. 5, the roof panel portion 32 is configured by installing a plurality of roof panels 81 and 82 on the roof structure 31. The roof panels 81 and 82 have a panel base 83 and a folded plate member 84, which are assembled together at the time of factory shipment. The panel base 83 has a frame or a heat insulating material formed of channel steel. The folded plate member 84 is formed of a steel plate and is provided on the panel base 83. The cross-section along the width direction of the folded plate member 84 has a trapezoidal wave shape and extends along the depth direction. The rear end of the folded plate member 84 protrudes further rearward than the rear end of the panel base 83 (see FIG. 6).

  The roof panels 81 and 82 include an upper roof panel 81 and a lower roof panel 82. The upper roof panel 81 is provided on the front truss unit 41. Further, the upper roof panel 81 is also provided on the front region including the second truss frame 62 in the unit non-installation space K. The panel base 83 of the upper roof panel 81 is formed in a size that matches the front truss unit 41 and the unit non-installation space K to be installed. And as for the panel base part 83 of the upper stage roof panel 81, as shown in part in FIG. 7, each adjacent thing is placed on the upper chord material 55 which the long side truss 51 of the front truss unit 41 has, And it is fixed to the upper chord material 55. In addition, this FIG. 7 expands and shows the adjacent part of the upper-stage roof panel 81 provided in the front truss unit 41, and the upper-stage roof panel 81 provided in the 1st unit non-installation space K1 on the right side. ing.

  In the first unit non-installation space K1, in addition to the first truss frame 61 and the second truss frame 62, a fourth truss frame 64 to a sixth truss frame 66 are provided. The upper roof panel 81 installed in this portion is also placed on each of these truss frames 61, 62, 64-66. Moreover, since the right front end portion of the roof structure 31 is formed in a concave shape by the fourth truss frame 64 to the sixth truss frame 66, a cutout portion is formed at the front end portion of the upper roof panel 81 in accordance with the shape. 85 is formed.

  Next, the lower roof panel 82 is provided on the back truss unit 42. The lower roof panel 82 is also provided on the rear region of the second truss frame 62 in the unit non-installation space K. The panel base 83 of the lower roof panel 82 is formed in a size that matches the rear truss unit 42 and the unit non-installation space K to be installed. And the panel base 83 of the lower roof panel 82 is also placed on the upper chord material 55 of the long side truss 53 of the back truss unit 42, and the adjacent ones are placed on the upper truss unit 42 as in the upper roof panel 81. It is fixed to the upper chord material 55.

  As shown in FIG. 7, a connected folded plate material 86 is provided between the folded plate materials 84 of the roof panels 81 and 82 provided adjacent to each other in the width direction. The connected folded plate material 86 is provided so as to overlap with the end portion in the width direction of the folded plate material 84 of the adjacent roof panel 70, and waterproof processing is performed by interposing a waterproof sheet or the like in the overlapping portion.

  Further, as shown in FIG. 6, a height difference is provided between the upper surface of the front truss unit 41 and the back truss unit 42 at the connection portion between the front truss unit 41 and the back truss unit 42. Utilizing this height difference, the front end portion of the lower roof panel 82 is provided in a state where it vertically overlaps with a portion where the folded plate member 84 of the upper roof panel 81 protrudes rearward. A rain cover 87 is provided at an overlapping portion between the upper roof panel 81 and the lower roof panel 82. In addition, a spacer 88 is provided in a hole portion that leads to the inside of the roof due to the unevenness of the folded plate member 84, and the hole portion is closed. With the rain cover 87 and the spacer 88, waterproofing is applied to the height difference between the front truss unit 41 and the back truss unit 42.

  As described above, due to the truss frames 61 to 66 provided in the upper surface of the connection unit 40 and the unit non-installation space K, the water gradient that decreases from the front of the building 10 toward the back side is formed on the upper surface of the roof structure 31. Is provided. Since the upper roof panel 81 and the lower roof panel 82 are placed on the roof structure 31, the roof panel portion 32 constituted by the upper roof panel 81 and the lower roof panel 82 is also directed from the front toward the back. A water gradient is formed by tilting downward. Thereby, when rain falls on the roof part 30 of the building 10, it flows to the back side of the building 10 along the water gradient.

  The configuration of the roof portion 30 of the building 10 in the present embodiment has been described above. Then, the construction method of the building roof structure which builds the roof part 30 in the construction site of the building 10 is demonstrated.

  A truck or the like from the factory transports the members constituting the building body 20 such as the outer wall portion 21, the lattice pillars 22 and the intermediary pillars 23, the truss units 41 and 42, and the roof panels 81 and 82 to the construction site by a truck or the like. . The truck used for transportation is preferably a large vehicle such as a 10t car. At the construction site, the building body 20 is built on the foundation 11, the roof structure 31 is built above the building body 20, and then the roof panel portion 32 is built to be the roof portion 30.

  In constructing the roof structure 31, first, the front truss unit 41 and the back truss unit 42 are coupled on the ground to assemble the coupling unit 40 (ground assembly). This is the first step. In this case, the rear end portion on the lower side of the front truss unit 41 and the front end portion on the higher side of the rear truss unit 42 are brought into contact with each other and arranged in a vertical row. Above, it connects using the connection plate 43 grade | etc.,. Thereby, the some connection unit 40 is prepared.

  Subsequently, each connection unit 40 is lifted one by one using heavy machinery and sequentially installed above the building body 20. This is the second step. At that time, the connecting unit 40 is first installed at one end of the left and right ends of the building body 20. Next, the connecting unit 40 to be installed is installed at the other end of the left and right ends. Thereby, as for the building main body 20, both right-and-left both ends are fixed by the connection unit 40 in the first step, and stability of the building main body 20 is improved. The construction work of the roof part 30 after that can be advanced in the stabilized state. Thereafter, the remaining connection units 40 are installed at a predetermined interval from the installed connection units 40 between the connection units 40 installed at both left and right ends. Thereby, it will be in the state where the some connection unit 40 was left apart.

  After the installation of the connection unit 40 is completed, the sixth truss frame 66 is lifted from the first truss frame 61 by a heavy machine, arranged at each installation location in the unit non-installation space K, and connected to the connection unit 40. This is the third step. Following the installation of the connecting unit 40, the roof structure 31 is constructed by installing the first truss frame 61 to the sixth truss frame 66. Thereafter, the upper roof panel 81 and the lower roof panel 82 are sequentially installed above the truss units 41 and 42 and the unit non-installation space K. In this way, the roof portion 30 can be constructed.

  The roof structure and its construction method in the present embodiment are as described above. And according to the roof structure of this embodiment and its construction method, the effect shown below is acquired.

  (1) In the roof structure 31, adjacent connecting units 40 are spaced apart to form a unit non-installation space K, and a truss structure is constructed in the unit non-installation space K by truss frames 61 to 66. Yes. If sufficient strength is ensured at the connecting portions of the truss units 41 and 42, pillars and inner wall portions that support the connecting portions are unnecessary, and a wide indoor space 25 can be secured in the building body 20. Further, even when the width and depth of the building body 20 are widened, an increase in the number of connection units 40 and, in turn, the number of truss units 41 and 42 is suppressed as compared with the case where the entire roof structure 31 is configured by the connection units 40. it can. Thereby, the increase in the transportation cost of truss units 41 and 42 can be controlled. Therefore, the strength of the roof 30 and a wider indoor space 25 can be secured while suppressing an increase in transportation cost.

  (2) The building body 20 has a substantially rectangular shape in plan view, and the roof structure 31 has a configuration in which the connection unit 40 is provided above both left and right ends of the building body 20. According to the roof structure 31, when the connection unit 40 is installed above the building body 20, the connection unit 40 can be first provided at both left and right ends of the building body 20. Thereby, since the said both ends are firmly fixed by the truss structure of the connection unit 40, the construction operation | work of the subsequent roof structure 31 can be performed in the stable state.

  (3) In the unit non-installation space K between the connecting units 40, between the front end portions of the front truss unit 41, between the connecting portions of the truss units 41 and 42, and between the rear end portions of the back truss unit 42 The first truss frame 61 to the third truss frame 63 are provided respectively. Thereby, the intensity | strength of the unit non-installation space K is securable.

  (4) Since the width dimension W2 of the unit non-installation space K is the same along the depth direction, the roof structure 31 that forms a rectangular shape as a whole by the unit non-installation space K and the plurality of connecting units 40. Is formed. In this case, if the number of connecting units 40 and the width dimension W2 of the unit non-installation space K are adjusted, the width dimension of the roof structure 31 can be freely changed, and the roof portion 30 corresponding to the size of the building body 20 is provided. The degree of freedom in forming can be increased.

  (5) In the roof structure 31, a plurality of unit non-installation spaces K are provided, and the unit non-installation spaces K are provided at equal intervals in the direction in which the connecting units 40 are arranged. In this case, the dimensions of the truss frames 61 to 66 provided in each unit non-installation space K can be made common, the versatility of the truss frames 61 to 66 is increased, and the installation work of the truss frames 61 to 66 can be easily performed. . In addition, it is not necessary to manufacture the truss frames 61 to 66 in accordance with the unit non-installation space K having various dimensions, an increase in manufacturing cost can be suppressed, and the truss frames 61 to 66 can be easily transported.

  (6) The connecting unit 40 is provided with a water gradient along its longitudinal direction. The truss frames 61 to 66 have different height dimensions so that the same inclination as the water gradient of the connecting unit 40 is formed in the unit non-installation space K. Thereby, the inclination of a water gradient can be aligned in the whole roof structure 31 which consists of the installation part of the connection unit 40, and the unit non-installation space K. FIG. Thereby, it can suppress that the installation structure of the roof panels 81 and 82 installed on the roof structure 31 becomes complicated.

  (7) The longitudinal dimension of the front truss unit 41 is smaller than the longitudinal dimension of the back truss unit 42. As a result, when the truss units 41 and 42 are transported by a transportation means such as a truck, it becomes possible to load more back truss units 42 in one unit, and further suppress an increase in transportation cost. it can.

  (8) When constructing the roof structure 31, the connecting unit 40 is grounded and then the connecting unit 40 is lifted and installed above the building body 20. Thereafter, the truss frames 61 to 66 are installed in the unit non-installation space K. Thereby, the roof structure 31 of this embodiment can be constructed | assembled suitably. In addition, since the operation of connecting the truss units 41 and 42 to form the connecting unit 40 is performed not at the factory but at the construction site, the depth of the truss units 41 and 42 is set within the range of transportation restrictions. The long roof part 30 can be constructed. Further, because of the connection work on the ground, the work is easier than the connection work on the building body 20.

  The present invention is not limited to the above-described embodiment, and may be implemented as follows, for example.

  (A) In the above embodiment, no truss frame is provided between the second truss frame 62 and the third truss frame 63. However, depending on the size of the roof portion 30 and the like, it may be necessary to improve the strength by constructing a truss structure in the hollow portion. For this reason, as shown in FIG. 8, a seventh truss frame 91 may be installed between the second truss frame 62 and the third truss frame 63. A plurality of seventh truss frames 91 may be provided as shown in the figure, or one seventh truss frame 91 may be provided.

  (B) In the above-described embodiment, the connection unit 40 is provided at the left and right ends of the building body 20. However, the position where the connection unit 40 is arranged depends on the width dimension of the building body 20 and the like. Is optional. For example, as shown in FIG. 9, when the width dimension of the building main body 20 is shorter than the structure of the said embodiment, the structure by which the connection unit 40 is not arrange | positioned at a left end part may be employ | adopted. In this case, it is necessary to construct a truss structure by installing long-side truss frames 92 and 93 in addition to the truss frames 61 to 66 at the end where the connecting unit 40 is not disposed.

  (C) In the embodiment described above, the width dimension W2 of the unit non-installation space K is set to be the same as the width dimension W1 of the connection unit 40, but a different width dimension may be set. For example, as shown in FIG. 10, a width dimension W3 larger than the width dimension W1 of the connecting unit 40 may be set. In this case, the truss structure is constructed by installing the truss frames 94 to 97 necessary for securing the strength at predetermined locations. Further, as in this example, the unit non-installation space K does not need to have the equally-spaced width dimension W2, and the width dimension may be different for each unit non-installation space K.

  (D) In the above embodiment, the roof structure is such that the unit non-installation space K is provided between the adjacent connection units 40. However, as shown in FIG. There may be an adjacent portion without intervening. That is, it is not always necessary to provide the unit non-installation space K between the connecting units 40.

  (E) In the above embodiment, the roof portion 30 is provided with the flange portion 30a. However, the flange portion 30a may be omitted. Even when the collar portion 30a is provided, a configuration without a recessed portion provided at the front right end portion as in the present embodiment or a configuration in which the recessed portion is provided at the front left end portion may be employed. When the structure without a dent part is employ | adopted, all the front truss units 41 used for the roof structure 31 can be shared.

  (F) In the above embodiment, the roof structure 31 is constructed including the four connecting units 40 and the three unit non-installation spaces K. However, the number of the connection units 40 and the unit non-installation spaces K is arbitrary. It is. For example, the roof structure 31 may be constructed including the five connecting units 40 and the four unit non-installation spaces K.

  (G) In the above embodiment, as a construction method for constructing the roof structure 31, the connection units 40 are first installed at the left and right ends of the building body 20. It is arbitrary in which position the connecting unit 40 to be installed subsequently and the connecting unit 40 is installed. Therefore, you may make it install the connection unit 40 installed initially in the intermediate part between right-and-left both ends.

  (H) In the above embodiment, after all the operations for configuring the connecting unit 40 by connecting the truss units 41 and 42 are performed, the procedure for sequentially installing the connecting units 40 above the building body 20 is performed. It was. Instead of this, the connecting operation of the truss units 41 and 42 and the installing operation of the connecting unit 40 may be performed in parallel.

  (I) Although the above embodiment has been described as being embodied in the building 10 used as a convenience store, the building 10 may be used for other purposes such as a supermarket, a store, and an office. .

  DESCRIPTION OF SYMBOLS 10 ... Building, 20 ... Building main body, 21 ... Outer wall part, 31 ... Roof structure, 40 ... Connection unit, 41 ... Front truss unit, 42 ... Back side truss unit, K ... Unit non-installation space.

Claims (9)

It consists of a pair of truss units that form a substantially rectangular parallelepiped shape, and has a plurality of connecting units in which both truss units are connected in a row in a row,
The plurality of connecting units are each arranged side by side above the building main body, and have a roof structure of a building installed across a pair of outer wall portions of the building main body,
A unit non-installation space provided adjacent to the connection unit above the building body, and in which the connection unit is not installed;
A truss frame provided in the longitudinal direction of the connecting unit in the unit non-installation space, and connected to the connection unit adjacent to the unit non-installation space;
The roof structure of the building characterized by comprising. The building body has a substantially rectangular shape in plan view,
The building roof structure according to claim 1, wherein at least the connection units are installed at both ends of the building main body in the direction in which the connection units are arranged.   The unit non-installation space is provided between the adjacent connection units, and the width dimension of the unit non-installation space in the alignment direction of the connection units is the same along the longitudinal direction of the connection units. The roof structure of a building according to claim 1 or 2, characterized by the above.   The building roof structure according to claim 3, wherein a plurality of the unit non-installation spaces are provided, and the width dimensions of the unit non-installation spaces are set at equal intervals. The connecting unit is provided with a water gradient along its longitudinal direction,
The plurality of truss frames have different height dimensions so that an inclination similar to the water gradient is formed in the unit non-installation space. The roof structure of the building described in the section   The length of the longitudinal direction of the truss unit which becomes the upper side of the water gradient in the connecting unit is smaller than the length of the truss unit which becomes the lower side of the water gradient. Building roof structure. The pair of truss units is
A front truss unit provided on the front side of the building and a back truss unit provided on the back side of the building than the front truss unit,
The truss frame is
Between front end portions of the front truss unit,
Between the connecting portions of the front truss unit and the back truss unit,
Between the rear ends of the back truss unit,
The roof structure of a building according to any one of claims 1 to 6, wherein the roof structure of the building is provided. A first step of connecting a pair of truss units having a substantially rectangular parallelepiped shape on the ground so as to form a connecting unit in a line in a vertical arrangement; and
A second step of installing the connecting unit above the building body;
Have
In the second step, in a state where at least one of the connection units is installed above the building body, another new connection unit is placed away from the installed connection unit, and the installed unit is installed. Including a step of installing so that a unit non-installation space is formed between the connection units,
A third step of providing a truss frame in the unit non-installation space and connecting the truss frame to the adjacent connecting unit;
The construction method of the building roof structure characterized by having. The building body has a substantially rectangular shape in plan view,
In the second step,
The connecting unit that is first installed above the building body is installed at one end of the connecting units in the arrangement direction, and the subsequent connecting unit is installed at the other end opposite to the one end. The construction method of the building roof structure of Claim 8 characterized by these.

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