JP2006037467A - Structure of expansion joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of an expansion joint capable of having the excellence in waterproofing efficiency and, at the same time, simplifying the structure to have high workability. <P>SOLUTION: The structure of the expansion joint is used for a connection section of a body section as the existing building, an extension outer wall section constructed by adjoining the body section and extended toward the body outer wall section of the body section and an extension section of a one-story building having a handrail wall section forming a handrail of a balcony on the roof placed on an upper position of the extension outer wall section, the first water drip board extended toward the extension outer wall section and the handrail wall section is provided to the body section, at the same time, the second water drip board extended to the body section having the same height as that of the first water drip board from the handrail wall section and the extension outer wall section is provided to the extension section, the first water drip board and the second water drip board are arranged by mutually having an overlap section capable of making relative displacement and, at the same time, a waterproofing sheet having pliability extended to the extension outer wall section and the handrail wall section from the body outer wall section at the inside of the first water drip board and the second water drip board is provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a structure of an expansion joint used for a connection part between a main body part which is an existing building and an extension part of a one-story building which is constructed adjacent to the main body part.

  In the extension method that adds the extension part to the main part, which is an existing building, if the main part and the extension part are integrated, both structures behave separately when an earthquake occurs, resulting in a crack in the joint. The appearance is easily damaged, and a large stress is generated at the joint, resulting in a disadvantageous structure in terms of earthquake resistance.

  Therefore, a construction method is proposed that uses an expansion joint that separates structurally by providing a gap between the main body and the extension, and that can absorb different behaviors that occur during an earthquake at the connection between the main body and the extension. (For example, refer to Patent Document 1).

JP 2003-96998 A

  However, in the conventional expansion joint method, the outer wall of the main body and the outer wall of the extension, or the upper floor outer wall of the main body and the roof of the one-story extension, etc. Designed as a structure and constructed individually. Therefore, the connection part between the first floor outer wall of the main body part and the first floor outer wall of the extension part, and the connection part of the second floor outer wall of the main body part and the handrail wall of the roof balcony of the one-story extension part have different forms, respectively. There is a problem that a complicated rain finish is required at the continuous portion of the upper and lower connecting portions, and as a result, there is a risk of rain leakage and a decrease in workability.

  According to the present invention, a first draining plate that is vertically long is provided in the main body, and a second draining plate that extends from the handrail wall portion and the extended outer wall portion toward the main body portion is provided in the extension portion, and the first draining plate is provided. And the second draining plate are arranged with an overlapping portion, and a waterproof sheet having flexibility that extends from the additional outer wall portion to the additional outer wall portion inside the first draining plate and the second draining plate. It is based on providing, and it is the subject to provide the structure of the expansion joint which is excellent in waterproof performance and simplified in structure and good in workability.

  In order to achieve the above object, an invention according to claim 1 includes a main body part that is an existing building, and an extended outer wall part that is constructed adjacent to the main body part and extends toward the main body outer wall part of the main body part, And an expansion joint structure used for a connection part with an extension part of a one-storied house having a handrail wall part disposed above the extension outer wall part to form a handrail of a roof balcony, and the extension outer wall part is connected to the main body part And a vertically long first draining plate extending toward the handrail wall portion, and extending from the handrail wall portion and the extended outer wall portion to the main body portion at the same height as the first draining plate. The first draining plate and the second draining plate are arranged to have an overlapping portion that can move relative to each other, and the first draining plate and the second draining plate Inside, from the main body outer wall to the extension outer wall and Characterized in that the tarpaulin is provided with a flexible extending Surikabe unit.

  In the invention according to claim 2, the waterproof sheet is covered with a waterproof cap on the upper part together with the base material of the handrail wall part in order to prevent rainwater from entering from the upper part. 1 has a main plate portion parallel to the surface of the extension outer wall portion, an attachment portion that is bent at a right angle at the base portion of the main plate portion, and a step portion that is recessed inward at a continuous portion of the main plate portion and the attachment portion. Thus, a substantially L-shaped cross section is formed, and a sealing material is filled in a groove portion formed by the step portion and the main body outer wall portion.

  According to a fourth aspect of the present invention, the waterproof sheet is attached by sandwiching one side portion between a base bar having a rectangular cross section fixed to the outer wall portion of the main body and the outer wall portion of the main body. The expansion joint structure according to any one of claims 1 to 3, wherein an inner wall plate of the wall portion is fixed by the base bar.

  In the invention which concerns on Claim 1, since the 1st draining board, the 2nd draining board, and a waterproof sheet continue up and down from a handrail wall part to an extension outer wall part, it is excellent in waterproof performance, and a structure is simple. There is good workability because there is. Moreover, since the 1st draining board and 2nd draining board which are arranged with an overlapping part can be relatively moved, different behaviors of the main body part and the extension part can be smoothly absorbed during an earthquake, cracks, etc. Does not occur. Furthermore, double waterproofing is performed by a waterproof sheet disposed inside the first draining plate and the second draining plate, and intrusion of rainwater is prevented.

  As in the invention according to claim 2, when a waterproof cap is put on the upper portion of the waterproof sheet and the base portion of the handrail wall portion, inundation from the upper portion of the handrail wall, which is a weak point of watertightness, is prevented, and By comprising like this invention, the watertightness between a main body outer wall part and a 1st draining board improves.

  In addition, by configuring as in the invention according to claim 4, the waterproof sheet and the inner wall plate of the handrail wall portion can be fixed using the same base beam, so the structure is simplified by reducing the members used, Workability can be improved.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the structure 1 of the expansion joint is formed in a connecting portion S between a main body 2 that is an existing building and an extension 6 of a one-story building, and a first draining plate 7 provided in the main body 2. The second draining plate 8 provided in the extension part 6 and the waterproof sheet 10 provided inside the first draining plate 7 and the second draining plate 8 are provided.

  As shown in FIG. 3, the main body 2 is a multi-story building including a two-story building. In this embodiment, the outer wall panel P1 is continuously attached to the left and right on the foundation 21 using a dedicated hardware, and further, A wall structure building constructed by joining the outer wall panel P1 upward is also exemplified. The outer wall panel P1, for example, fixes both ends of upper and lower horizontal frame members with a U-shaped cross section facing inward and upper and lower ends of a vertical frame material with a U-shaped cross section facing inwardly disposed on the left and right. The exterior plate and interior base plate are attached to both sides of a rectangular frame and a steel panel frame that serves as a vertical or horizontal reinforcing bar spanning the inside of the peripheral frame. It is formed. A column cover 22 having an L-shaped cross section is mounted at the outer wall protruding corner, and a curtain plate 23 is mounted between the upper and lower outer wall panels P1, P1 to form an outer wall. In addition, the main body 2 may be a building such as a ramen structure, an RC structure, a wooden frame structure, or a two-by-four structure constructed by attaching a non-bearing wall panel to a structural frame in which steel columns and beams are assembled.

  The extension part 6 is a one-story building as described above, is constructed adjacent to the main body outer wall part 3 of the main body part 2, and further includes the roof balcony B adjacent to the main body part 2. In this specification, the outer wall of the main body 2 and the portion facing the extension 6 is referred to as the main body outer wall 3, and is the outer wall of the extension 6, toward the main body outer wall 3. The portion extending substantially at a right angle is referred to as an extension outer wall 4. In this embodiment, the extension outer wall portion 4 is made of a steel column 25 fixed to the foundation 24 of the extension portion 6 via an anchor bolt (not shown), and a lightweight steel frame having an H-shaped cross section supported by the column 25. An example is shown that includes a beam 26 and a non-bearing panel P2 fixed between the beam 26 and the foundation 24 by a fixture 27. The column 25 has a cantilever 32 attached to the upper end of the column 25 at the same height as the beam 26 and facing the outer wall 3 of the main body, and a balcony column 34 having a horizontal joint 33 having a U-shaped cross section fixed to the top. ing. The non-bearing panel P2 has an exterior plate 29 and an interior base plate 30 adhered to both sides of a rectangular wooden panel frame 28, and a heat insulating material 31 such as glass wool is filled inside. Further, as shown in FIG. 12, the extension portion 6 is provided with a handrail wall portion 5 serving as a handrail for the roof balcony B above the extension outer wall portion 4, and the handrail wall portion 5 and the extension outer wall portion 4 are And a connecting portion S with the main body outer wall portion 3 formed to extend from the pillar 25 toward the main body outer wall portion 3.

  As shown in FIGS. 3 and 4, the first draining plate 7 is a vertically long material having a length from the lower end of the extension outer wall portion 4 to the upper end of the handrail wall portion 5. In this embodiment, the first draining plate 7 is shown in FIG. 5. As described above, the main plate portion 7A parallel to the surface of the extension outer wall portion 4, the mounting portion 7B parallel to the surface of the main body outer wall portion 3 at the base portion of the main plate portion 7A, and the main plate portion 7A and the attachment portion 7B are continuous. It has a stepped portion 7C formed at a location and recessed inward, and has a substantially L-shaped cross section. Further, a bent piece 54 that is bent outward for reinforcement is formed at the end of the main plate portion 7A.

  The mounting portion 7B of the first draining plate 7 is fixed to the column cover 22 of the main body outer wall portion 3 by a fixing tool 35 such as a screw, whereby the leading end of the main plate portion 7A is connected to the extension outer wall portion 4 and the handrail wall portion 5. It extends toward. And as shown in FIG. 2, the sealing material 14 is filled in the groove part formed by the said step part 7C and the pillar cover 22, Thereby, the watertightness between the main body outer wall part 3 and the 1st draining board 7 is provided. It has improved.

  The first draining plate 7 has a thickness of, for example, about 0.3 to 1.2 mm, the width of the main plate portion 7A is, for example, about 35 to 150 mm, and the width of the mounting portion 7B is, for example, 20 to 20 mm. About 90 mm, the stepped portion 7 </ b> C preferably has a side of about 5 to 20 mm. The first draining plate 7 includes galvanium steel plate (registered trademark) made by Daido plate, galvanized steel plate such as Rivergalfan (registered trademark) made by Kawatetsu, electrogalvanized steel plate, specially coated steel plate and others. Can be used.

  As shown in FIGS. 1 and 11, the second draining plate 8 is a vertically long long plate material having substantially the same vertical length as the first draining plate 7 and parallel to the surface of the extension outer wall portion 4. In this embodiment, as shown in FIG. 2, an end piece 37 formed by bending the substrate portion 36 and the end portion on the main body outer wall portion 3 side of the substrate portion 36 at right angles outward and folding back 180 degrees. Consists of. This end piece 37 has a narrow strip shape in the vertical direction, and is continuous with the substrate portion 36 at a substantially center line portion.

  As shown in FIG. 11, the second draining plate 8 is formed by using a fastener such as a screw (not shown) on the outer wall base plate 38 of the extension outer wall portion 4 and the handrail base plate 39 of the handrail wall portion 5. The first draining plate 7 is fixed at the same height. At this time, the tip of the second draining plate 8 extending toward the outer wall 3 of the main body is disposed so as to be able to move relative to the first draining plate 7 on the outdoor side, and an overlapping portion 9 is formed by this double portion. Is done. Further, in the overlapping portion 9, as shown in FIG. 2, the inner end of the end piece 37 of the second draining plate 8 is in contact with the outer surface of the main plate portion 7A of the first draining plate 7, and the second draining plate The watertight material 40 mounted on the inner side of the end piece 37 is pressed against the outer surface of the main plate portion 7A, whereby high watertightness performance is maintained between the first and second draining plates 7 and 8 and relative movement is maintained. It is free to absorb the difference in behavior between the main body 2 and the extension 6 at the time of an earthquake and prevent damage such as cracking of the outer wall surface. In the relative movement, movement in the surface direction of the first and second draining plates 7 and 8 and movement of the first and second draining plates 7 and 8 that are perpendicular to the first and second draining plates 7 and 8 are allowed freely. The movements approaching each other are allowed in a range that the first and second draining plates 7 and 8 can absorb by bending deformation. Further, since the first and second draining plates 7 and 8 are continuously formed on the extension outer wall portion 4 and the handrail wall portion 5, a seamless expansion joint is formed in the upper and lower layers, and as a result, a waterproof function. High reliability and excellent workability.

  The second draining plate 8 has a thickness of, for example, about 0.3 to 1.2 mm, and the substrate portion 36 has a width dimension of, for example, about 100 to 400 mm. The steel plate is the same as the first draining plate 7. Is molded. For the watertight material 40, ethylene propylene rubber (EDPM), chloroprene rubber (CR), ethylene vinyl acetate copolymer resin (EVA), or the like is used.

  As shown in FIG. 3, the waterproof sheet 10 has a width from the main body outer wall portion 3 to the pillar 25 of the extension portion 6 and extends vertically from the lower end of the extension outer wall portion 4 to the upper end of the handrail wall portion 5. Form a belt. And the side part close | similar to the main-body part 2 is attached by pinching | pinching with the base frame 15 of the cross-sectional rectangle shape fixed to the column cover 22 of the main body outer wall part 3 by the fixing tools 41, such as a screw, and the column cover 22. The inner sides of the first and second draining plates 7 and 8 extend toward the extension outer wall 4 and handrail wall 5 and are sandwiched between the second draining plate 8 and the outer wall base plate 38 and handrail base plate 39. Fixed. Thus, since the waterproof sheet is formed inside the first and second draining plates 7 and 8 by the waterproof sheet 10, the first and second connection portions S between the main body portion 2 and the extension portion 6 are connected to the first and second drain plates 7 and 8. Double waterproofing by the draining plates 7 and 8 and the waterproof sheet 10 is constructed, and the watertight performance is improved. Moreover, since the waterproof sheet 10 has flexibility, it can follow the movement of the connecting portion S, and further, since it is provided seamlessly from the lower end of the extension outer wall portion 4 to the upper end of the handrail wall portion 5, there is no leakage of rain. Can be done easily.

  The waterproof sheet 10 has a thickness of about 0.3 to 3.0 mm and a width of about 200 to 600 mm, for example, a vulcanized rubber sheet, a non-vulcanized rubber sheet, A vinyl resin-based sheet, an ethylene vinyl acetate resin-based sheet, a thermoplastic elastomer-based sheet, or the like can be used.

  As shown in FIG. 9, the waterproof sheet 10 is covered with a waterproof cap 12 together with the horizontal joint member 33 of the balcony column 34 and the base portion 11 of the handrail wall portion 5 including the handrail base plate 39. As shown in FIG. 10, the waterproof cap 12 includes a base 12A, and a front cover 12B that is continuous with the base 12A on two sides on the upper side and the main body outer wall 3 side, and has a smaller height than the base 12A. The base 12A and the front cover 12B are attached so as to cover the waterproof sheet 10 and the base part 11 from above because the lower part and the opposite side of the main body outer wall part 3 are separated. Thus, since the upper part of the waterproof sheet 10 is covered with the waterproof cap 12, the flooding from the handrail wall part 5 upper part is prevented effectively.

  Further, as shown in FIG. 2, the end portion of the wall plate 16 inside the handrail wall portion 5 is fixed to the base frame 15 to which the waterproof sheet 10 is fixed by a fixing tool such as a screw (not shown). Thus, in this form, since the waterproof sheet 10 and the said wall board 16 are fixed with respect to the one base crosspiece 15, it is preferable at the point which is excellent in workability.

  Next, the construction method of the expansion joint structure 1 including the construction of the handrail wall 5 will be described. First, as shown in FIGS. 3 and 5, the base frame 15 in which the side portion of the waterproof sheet 10 is sandwiched between the column cover 2 of the main body outer wall portion 3 is fixed to the column cover 22 using the fixing tool 41. As a result, the side portion of the waterproof sheet 10 is attached. In addition, in order to avoid the cantilever 32, the base frame 15 is separated vertically. Adjacent to the waterproof sheet 10, the mounting portion 7 </ b> B of the first draining plate 7 is fixed to the column cover 22 using the fixing tool 35.

  Next, as shown in FIGS. 6 and 7, a first headboard base 46 and a second headboard base 47 are fixed on the horizontal joint member 33 of the balcony post 34, and the horizontal joint between the beam 26 and the balcony post 34 is secured. A handrail panel 42 constituting the handrail wall portion 5 is attached between the material 33 and the substantially horizontal U-shape constituting the connection portion S of the handrail wall portion 5 between the cantilever 32 and the horizontal joint member 33. A handrail base frame 43 is attached. Further, the outer wall of the vertically long rectangular frame that forms the connecting portion S of the extension outer wall 4 between the base 21 of the main body 2 and the base 24 of the extension 6 and the cantilever 32. A base frame 45 is attached. At this time, in order to secure a work space, the waterproof sheet 10 is turned over in advance and temporarily fixed with an adhesive tape or the like.

  Next, as shown in FIG. 8, a vertically long rectangular plate-like outer wall base plate 38 is formed on the outer wall base frame 45, and a handrail base plate 39 is formed on the handrail base frame 43 and the second headboard base 47. Each of them is fixed using a fixing tool, adhesive or the like. As the outer wall base plate 38 and the handrail base plate 39, a water-resistant plywood or the like having a thickness of, for example, about 12 mm is used. Then, as shown in FIG. 9, the waterproof sheet 10 is overlaid on the outer wall base plate 38 and the handrail base plate 39, and the horizontal joint material 33 of the balcony column 34, the second headboard base 47, and the handrail base plate 39 are provided. A waterproof cap 12 shown in FIG. 10 is put on the base portion 11 and the waterproof sheet 10 that are included. At this time, the upper part of the base frame 15 is temporarily removed from the column cover 22 and is fixed again after the waterproof cap 12 is attached. Further, the seam between the waterproof cap 12 and the column cover 22 at the upper part and both side parts of the waterproof cap 12 on the main body outer wall 3 side is sealed with a sealing material to improve waterproofness.

  Next, as shown in FIG. 11, the second draining plate 8 is arranged so as to cover the outer surface of the waterproof cap 10 and the waterproof cap 12 in the upper part, and the outer wall base plate 38 is used by using a fixing tool such as a screw (not shown). And it adheres to the handrail base plate 39. At this time, the end piece 37 of the second draining plate 8 comes into contact with the outer surface of the first draining plate 7 as shown in FIG.

  Next, as shown in FIG. 12, an outer wall exterior plate 48, a curtain plate 49, and a waist wall exterior plate 50 are arranged so as to cover the outer surface of the second draining plate 8, and the outer wall base plate is used by using a fixing tool. 38 and the handrail base plate 39. At this time, as shown in FIG. 2, the outer wall exterior plate 48, the curtain plate 49, and the waist wall exterior plate 50 end portions on the main body outer wall portion 3 side are placed between the end piece 37 of the second draining plate 8, for example, 5 to 5. It arrange | positions at intervals of about 20 mm, and the sealing material 51 is filled in the groove | channel formed, and watertightness is ensured.

  Next, a column cover 52 that covers the column 25 and the balcony column 34 of the extension portion 6 is attached, and a horizontally long main curtain plate 53 is fixed between the non-bearing panel P2 and the handrail panel 42. Further, as shown in FIG. 3, the wall plate 16 is fixed to the base rail 15 and the handrail base frame 43 inside the connection portion S of the handrail wall portion 5. Further, as shown in FIG. 12, a decorative headboard cover 54 having a U-shaped cross section is attached from above the first and second headboard bases 46 and 47 to waterproof and make up the upper part of the handrail wall 5. .

It is sectional drawing which illustrates one embodiment of this invention. It is the principal part enlarged view. It is a perspective view explaining a construction method and illustrating the attachment process of a waterproof cover and a 1st draining board. It is a perspective view which illustrates the state where the waterproof cover and the 1st draining board were attached. It is the AA sectional view. It is a perspective view which illustrates the attachment process of a handrail panel, a handrail base frame, and an outer wall base frame. It is a perspective view which illustrates the state where a handrail panel, a handrail base frame, and an outer wall base frame were attached. It is a perspective view which illustrates the attachment process of an outer wall base plate and a handrail base plate. It is a perspective view which illustrates the attachment process of a waterproof cap. It is a perspective view of a waterproof cap. It is a perspective view which illustrates the attachment process of the 2nd draining board. It is a perspective view which illustrates the attachment process of an outer wall exterior board, a curtain board, and a waist wall exterior board.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Structure of expansion joint 2 Main body part 3 Main body outer wall part 4 Extension outer wall part 5 Handrail wall part 6 Extension part 7 1st draining board 7A Main board part 7B Mounting part 7C Step part 8 2nd draining board 9 Overlapping part 10 Waterproof sheet DESCRIPTION OF SYMBOLS 11 Base material 12 Waterproof cap 13 Groove part 14 Sealing material 15 Base frame 16 Wall board B Roof balcony S Connection part

Claims (4)

A main body part which is an existing building, an extension outer wall part which is constructed adjacent to the main body part and extends toward the main body outer wall part of the main body part, and a railing on the roof balcony which is arranged above the additional outer wall part The structure of the expansion joint used for the connection part with the extension part of the one-story building having the handrail wall part forming
The main body portion is provided with a vertically elongated first draining plate extending toward the extension outer wall portion and the handrail wall portion, and the extension portion has the same height as the first draining plate from the handrail wall portion and the extension outer wall portion. And providing a second draining plate extending toward the main body,
The first draining plate and the second draining plate are arranged to have an overlapping portion that can move relative to each other, and from the outer wall of the main body inside the first draining plate and the second draining plate. A structure of an expansion joint, characterized in that a waterproof sheet having flexibility extending to an extended outer wall portion and a handrail wall portion is provided.   The expansion joint structure according to claim 1, wherein the waterproof sheet is covered with a waterproof cap on an upper portion thereof together with a base portion of a handrail wall portion in order to prevent rainwater from entering from the upper portion. The first draining plate includes a main plate portion parallel to the surface of the extension outer wall portion, an attachment portion that is bent at a right angle at a base portion of the main plate portion, and a step portion that is recessed inward at a continuous portion of the main plate portion and the attachment portion. Having a substantially L-shaped cross section,
The expansion joint structure according to claim 1 or 2, wherein a sealing material is filled in a groove formed by the stepped portion and the outer wall portion of the main body. The waterproof sheet is attached by sandwiching one side portion between a base rail having a rectangular cross section fixed to the outer wall portion of the main body and the outer wall portion of the main body,
The structure of the expansion joint according to any one of claims 1 to 3, wherein an inner wall plate of the handrail wall portion is fixed by the base rail.

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