JP4260644B2 - Water stop structure at the joint of extruded cement board - Google Patents

Description

  The present invention relates to a water-stopping structure for a joint portion of an extrusion-molded cement board, and particularly to an improved technique that enhances the water-stopping function of rainwater without deteriorating the design of a building exterior.

  An extrusion-molded cement board obtained by extruding an uncured cement material and being cured is suitably used as a building exterior board because it is lightweight and has high strength. This type of extrusion-molded cement board is attached to a building frame by using a mounting bracket generally called a fastener or a Z-clip. When attaching an extrusion-molded cement board to an enclosure as an outer wall, a horizontal joint is formed between the extrusion cement boards adjacent to the upper and lower sides, and a vertical joint is formed between the extrusion cement boards adjacent to the left and right. By sealing the horizontal joints and the vertical joints formed in this way with a sealing material, intrusion of rainwater from these joints to the indoor side of the building is prevented.

  However, in such a seal structure, there is a risk that rainwater may enter the housing due to deterioration of the sealing material over time. In order to prevent such intrusion of rainwater, secondary waterproofness is imparted to the joints.

  For example, as shown in FIG. 11, the extruded water-cement structure of the extrusion-molded cement plate disclosed in the following Patent Document 1 has upper and lower extrusion-molded cement plates at the joint 2 of the extruded-molded cement plates 1a and 1b used as outer walls. A water stop plate 3 for preventing water leakage across the water stop plate, in which a lower end portion 3a of the water stop plate is inserted into a groove 5 provided in a rib surface 4 of a lower extruded cement plate 1b. A draining plate 8 is attached to the bottom part 7 of the extrusion-molded cement board, supported by the L-type through member 6 and attached to the bottom part 7 of the extrusion-molded cement board. 9 is provided.

  Moreover, the horizontal joint part structure using the waterproof joint material for extrusion molding plates disclosed in the following Patent Document 2 includes a convex part 14 formed with the joint material A on the panel 11, as shown in FIGS. The first seal portion 19 is formed corresponding to the gap 16 and the second seal portion 21 is formed corresponding to the gap 17. Are arranged together through the third seal portion 23, and a hook portion 25 is provided on the lower edge of one side of the first seal portion 19, and the hook portion 25 is formed on the convex portion 14 of the panel 11. Abuts the side. The end portion 22a of the horizontal joint gasket 22 disposed between the convex portion 14 and the concave portion 15 is fitted into a slit 27 formed in the end portion of the first seal portion 19 so that the joint material A and the horizontal joint The ground gasket 22 is connected to each other.

JP-A-6-57830 JP-A-8-260580

However, the joint water stop structure of the extrusion-molded cement board disclosed in the above-mentioned Patent Document 1 is related to the water stop structure of the horizontal joint of the vertically-extrusion-molded cement board. It was necessary to drain the rainwater into the hollow part and drain it from the bottom panel, or install an external drainer every several layers. And when outside drainage was adopted, drainage for each layer can be performed, but the outside drainage was exposed for each layer, and the design of the exterior appearance of the building was lowered.
Moreover, the horizontal joint part structure using the waterproof joint material for extrusion molding plates disclosed in Patent Document 2 is related to the water-stopping structure of the vertical joint, and water transmitted through the vertical joint enters the horizontal joint. However, since the drain pipe is equipped with a backflow prevention valve, it is easily clogged, rainwater is not properly discharged to the outside, and there is a risk of overflow due to more intrusion water at the bottom of the vertical joint. It was.
Furthermore, when the outside drainage is not used, since it is not drainage for each layer, it is difficult to specify the location of the water leak when water leaks.
The present invention has been made in view of the above situation, and it does not deteriorate the design of the exterior of the building, and the drainage pipe is not easily clogged. Another object of the present invention is to obtain a water-stopping structure for the joined part of an extruded cement board.

The extrusion-molded cement board joint water-stop structure according to claim 1 is an extrusion-molded cement board joint-water-stop structure applied to the intersection between the vertical joint and the horizontal joint of the horizontally-extruded cement board. A closing packing member is provided on each of the lower right end surface of the left extruded cement board and the lower left end surface of the right extruded cement board sandwiching the vertical joint, and the closing packing member is disposed on the upper extrusion surface. A sandwich packing sandwiched between the molded cement plate and the lower extruded cement plate; a block block continuously provided on the side surface of the sandwich packing to block a cross section of the horizontal joint; and a rear end surface of the block block A drainage with a water return plate extending upward from and projecting, wherein the closing blocks of the pair of closing packing members are in close contact with each other at the intersection, and the upper ends thereof are opened on the upper surfaces of the closing blocks. tube Lower end, characterized in that it is open to the outside through a longitudinal joint which is formed between the extruded cement board.

  In this extruded cement board joint water stop structure, even if the sealing material of the vertical joint breaks due to aging, etc., and rainwater enters, the infiltrated rainwater is blocked and received on the upper surface of the packing member, and the water return plate This prevents water leakage to the back side of the extruded cement board. Then, the intrusion rainwater received on the upper surface of the closing packing member is discharged to the outside through a drain pipe opened on the upper surface. Thereby, interlayer drainage is possible without using an external drainer. Further, the drain pipe having a simple structure can be used, and there is no need to use an expensive drain pipe with a backflow prevention valve.

According to a second aspect of the present invention, there is provided a water stop structure for a cemented cement board, wherein the closing packing member is disposed at the intersection located at the boundary of each layer.

  In this extruded cement board joint water stop structure, even if water leakage occurs, drainage is made between layers, and a large amount of rainwater does not concentrate at the bottom. Moreover, a water leak location can be found in each layer unit, and it is not necessary to examine the water leak location between multiple layers.

According to the joint water stop structure of extruded cement board according to claim 1, wherein according to the present invention, sandwiching the vertical joints, and the right end face bottom of the left extruded cement boards, left end face bottom of the right extruded cement board A sealing member is provided in each of the sealing blocks, the sealing blocks are in close contact with each other at the intersection, and the lower end of the drain pipe having the upper end closed and opened on the upper surface of the blocks is formed between the extruded cement plates. Therefore, interlayer drainage can be performed without using a drain, and deterioration in design of the exterior of the building can be prevented. Moreover, since it is not necessary to use the drain pipe with a backflow prevention valve, cost can be suppressed and clogging of the pipe can also be prevented.

According to the water-stopping structure of the extruded cement board according to claim 2 according to the present invention, since the closing packing member is disposed at the intersection located at the boundary of each layer, water leakage should occur. Even if it is a case, since it drains between layers, it does not overflow at the lowest part, and a leak location can be specified easily. Thereby, the expense concerning the maintenance of a building can be reduced.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a water stop structure for a cemented cement board according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a reference form of a joint water stop structure according to the present invention, FIG. 2 is a longitudinal sectional view of the main part of FIG. 1, FIG. 3 is a front view of the main part of FIG. It is a cross-sectional view.
The joint water stop structure of the extruded cement board according to the present embodiment is applied to the intersection CM between the vertical joint VM and the horizontal joint HM of the vertically stretched extruded cement board 31. The extruded cement board 31 is formed with a hollow hole 33 in the extrusion direction. In the vertical tension, the extrusion-molded cement board 31 is attached to the support member on the casing side so that the hollow hole 33 extends in the vertical direction.

  In this joint water stop structure, a drain plate 35 that is an internal drainer is used. The draining plate 35 is formed in an L-shaped cross section comprising a horizontal piece 35a and an upright piece 35b. The draining plate 35 is sandwiched between the lower extrusion cement plates 31DL and DR and the upper extrusion cement plates UL and UR at a position where the horizontal piece 35a crosses the vertical joint VM. A drain pipe 37 is connected to and integrated with the horizontal piece 35 a of the draining plate 35. The drain pipe 37 has an upper end opened on the upper surface 39 of the horizontal piece 35a, and a lower end penetrating the vertical joint VM formed between the lower extruded cement plates 31DL and DR and opened to the outside.

  Therefore, by using the drainage pipe 37 integrated with the drainage plate 35 which is an internal drainer, the rainwater that has entered the hollow hole 33 does not flow into the hollow holes 33 of the lower extruded cement plates 31DL and DR. It is received between the layers and can be discharged to the outside by the drain pipe 37.

  A water return piece 41 is provided at the front edge of the horizontal piece 35a, and the water return piece 41 is bent upright in parallel with the upright piece 35b. As shown in FIG. 2, the water return piece 41 is brought into contact with the lower end surfaces 43 of the upper extruded cement plates UL and UR. By providing the water return piece 41, the draining plate 35 is prevented from overflowing from the front edge of the infiltrated rainwater received by the horizontal piece 35a. Moreover, the attitude | position of the horizontal piece 35a becomes easy to be positioned horizontally because the upper end of the water return piece 41 contact | abuts to the lower end surface 43 of upper extrusion-molded cement board UL and UR. Furthermore, even when the horizontal joint HM at the intersection CM deteriorates over time, the horizontal piece 35a acts as a barrier, making it difficult for rainwater to enter.

  In this way, the water return piece 41 is bent at the front edge of the horizontal piece 35a, and the water return piece 41 is brought into contact with the lower end surfaces 43 of the upper extruded cement plates UL and UR. The infiltration rainwater received at 35a is not overflowed and discharged to the horizontal joint HM, and the rainwater can be reliably discharged to the outside by the drain pipe 37.

  Gaskets 45 shown in FIGS. 1 and 4 are sandwiched between the side surfaces of the extruded cement plate 31 sandwiching the vertical joint VM. Two parallel convex surfaces 49 and 51 are formed on the side surface of the extruded cement plate 31 with a vertical groove 47 interposed therebetween, and the gasket 45 is sandwiched between the indoor convex surfaces 51. Is preferred. The bottom surface 43 of the extruded cement board 31 is supported by an angle steel material 53. The chevron steel material 53 is fixed to a frame side support steel material (not shown). As shown in FIG. 2, the angle steel material 53 supports the lower end surface 43 of the extrusion-molded cement plate 31 through the draining plate 35 and the packing material 55.

  A backup material 57 is provided on the standing piece 35 b of the draining plate 35, and the backup material 57 abuts on the back surface of the extruded cement plate 31 to regulate the relative position between the draining plate 35 and the extruded cement plate 31. A lateral gasket 59 is provided above the backup material 57, and the lateral gasket 59 stops water between the standing piece 35 b and the extruded cement plate 31. Further, a sandwiching material 61 is sandwiched between the lower surface of the horizontal piece 35a and the lower extrusion cement plate 31DL, DR, and the sandwiching material 61 is composed of the horizontal piece 35a and the lower extrusion cement plate 31DL. , The gap formed between the upper end surface of the DR is closed. In this way, the vertical joint VM and the horizontal joint HM formed by attaching the upper extrusion cement boards UL and UR and the lower extrusion cement boards 31DL and DR are filled with the sealing material 65, The sealing material 65 prevents rainwater from entering the joint from the outside.

  The draining plate 35 and the drain pipe 37 are disposed at the intersection CM located at the boundary of each level. The drain pipe 37 may be attached for each layer and for each vertical joint VM, or may be attached for every several layers and every several vertical joints VM. That is, the number of drainage pipes 37 may be selected according to usage conditions (wall surface area, building height, location conditions, surrounding environment).

  The drainage pipe 37 having a length of about 100 to 250 mm can be used, but a drainage pipe having a length corresponding to usage conditions (wall surface area, building height, location conditions, surrounding environment) can be used. Moreover, although the length which the drain pipe 37 protrudes from a joint part is about 6-12 mm, it can be set as the length according to use conditions (the area of a wall surface, building height, location conditions, the surrounding environment). . The drainage pipe 37 can be bent into a U-shape, thereby preventing backflow of water from the outside without using an expensive drain pipe with a backflow prevention valve.

  As the material of the drain plate 35 and the drain pipe 37, aluminum, stainless steel, plastic, rubber or the like can be used. When the drain plate 35 is made of a metal material such as aluminum, the back side gasket is retrofitted, but when a plastic or rubber material is used, the cross-sectional shape shown in FIG. 2 is integrated. be able to.

  As described above, the draining plate 35 and the drainage pipe 37 are arranged at the intersection CM located at the boundary of each layer, so even if water leaks by any chance, drainage is made between layers, A large amount of rainwater does not concentrate at the bottom. Moreover, a water leak location can be found in each layer unit, and it is not necessary to examine the water leak location between multiple layers. Thereby, it does not overflow at the lowest part, and a water leak location can be specified easily, and the expense concerning the maintenance of a building can be reduced.

  In the jointed water stop structure of this extruded molded cement board, even if the sealing material 65 of the vertical joint VM is cut due to aging or the like, and the rainwater enters, the intrusion rainwater is received by the horizontal piece 35a of the drainage plate 35. Infiltration rainwater is discharged to the outside through the drain pipe 37 opened on the upper surface of the horizontal piece.

  Therefore, according to this joint-cemented water stop structure of the extrusion-molded cement board, interlayer drainage can be performed without using an external drain, and the design of the exterior of the building can be prevented from being deteriorated. Moreover, since it is not necessary to use the drain pipe with a backflow prevention valve, cost can be suppressed and clogging of the pipe can also be prevented.

Next, a description will be given of an embodiment of a joint water stop structure of an extrusion-molded cement board according to the present invention.
FIG. 5 is a perspective view of an embodiment of a joint water stop structure according to the present invention, FIG. 6 is a side view of a closing packing member, FIG. 7 is a view taken along the line AA in FIG. FIG. 9 is a longitudinal cross-sectional view of the main part of FIG. 5, and FIG. 10 is a cross-sectional view of the main part of FIG. In addition, the same code | symbol shall be attached | subjected to the member and site | part same as the member and site | part shown in FIGS. 1-4, and the overlapping description shall be abbreviate | omitted.
The joint water stop structure according to this embodiment is applied to the intersection CM between the vertical joint VM and the horizontal joint HM of the extrusion-molded cement board 31 that is horizontally stretched.

  In this joint water stop structure, packing members 71 (71R, 71L) are respectively closed to the lower right end surface of the left extruded cement plate UL and the lower left end surface of the right extruded cement plate UR across the vertical joint VM. ) Is provided. The closing packing member 71 includes the sandwich packing 73 shown in FIG. 8 sandwiched between the upper extrusion cement plates UL and UR and the lower extrusion cement plates 31DL and DR, and the sandwich packing 73. A closing block 75 shown in FIG. 5 that is connected to the side surface of the closing block and closes the cross section of the horizontal joint HM as shown in FIG. 9, and a water return plate 77 that extends upward from the rear end face of the closing block 75 and projects. Consists of. The sandwich packing 73 has a pair of sandwich projections 73 a and 73 a that sandwich the end portion of the lateral gasket 74. As shown in FIG. 10, it is desirable that the water return plate 77 protrudes toward the extrusion-molded cement plate 31, and the protruding portion is in close contact with the back surface of the extrusion-molded cement plate 31.

  The closing packing member 71 has two types of shapes, a right hand and a left hand. As shown in FIG. 10, the right-handed closing packing member 71 </ b> R has a closing block 75 on the right side of the sandwiching packing 73, and the left-handed closing packing member 71 </ b> L has the closing block 75 on the left side of the sandwiching packing 73. Have. In the intersection CM shown in FIG. 5, the closing blocks 75 of the pair of closing packing members 71R and 71L are in close contact with each other, and the lower end of the drain pipe 79 opened at the upper surface of the blocking blocks 75 is extruded cement. It passes through the vertical joint VM formed between the plates and is opened to the outside. In this case, the drain pipe 79 is made of a straight pipe material and is arranged with a downward slope toward the outside.

  The closing packing member 71 is disposed at the intersection CM located at the boundary of each layer. The sealing packing member 71 integrates the water return plate 77 into the block block 75 so that the water return plate 77 attached to the horizontal joint HM of the left and right extruded cement plates 31 blocks the vertical joint VM. The water received in this portion can be reliably discharged outside without flowing out into the room.

  Even if water leaks, the water is drained between layers, and a large amount of rainwater does not concentrate at the bottom. Moreover, a water leak location can be found in each layer unit, and it is not necessary to examine the water leak location between multiple layers. Thereby, infiltration rainwater does not overflow at the lowest part, and a leak point can be specified easily, and the expense concerning maintenance of a building can be reduced.

  In this extruded cement board joint water stop structure, even if the sealing material of the vertical joint VM is cut due to aging or the like, and rainwater or the like enters, the intrusion rainwater is blocked and received on the upper surface of the packing member 71, The return plate 77 prevents water leakage to the back side of the extruded cement plate 31. And the intrusion rain water received by the upper surface of the closing packing member 71 is discharged | emitted outside through the drain pipe 79 opened to this upper surface. Thereby, interlayer drainage is possible without using an external drainer. Also, the drain pipe 79 can be of a simple structure, and there is no need to use an expensive drain pipe with a backflow prevention valve.

  Therefore, according to the water stop structure of the extruded cement plate joint, each of the lower right end surface of the left extruded cement plate UL and the lower left end surface of the right extruded cement plate UR sandwiching the vertical joint VM. In the intersection part CM, the closing blocks 75 are in close contact with each other, and the lower ends of the drain pipes 79 that are closed on the upper surfaces of the blocks 75 are opened between the extruded cement plates. Since the vertical joint VM is formed and opened to the outside, interlayer drainage can be performed without using an external drain, and design deterioration of the appearance of the building can be prevented. In addition, since it is not necessary to use a drain pipe with a backflow prevention valve, it is possible to reduce the cost and to prevent the pipe from being clogged.

It is a perspective view of the reference form of the junction water stop structure concerning the present invention. It is a principal part longitudinal cross-sectional view of FIG. It is a principal part front view of FIG. It is a principal part cross-sectional view of FIG. It is a perspective view of an embodiment of a junction water stop structure concerning the present invention. It is a side view of a closing packing member. It is an AA arrow line view of FIG. It is a BB arrow line view of FIG. It is a principal part longitudinal cross-sectional view of FIG. FIG. 6 is a cross-sectional view of a main part of FIG. 5. It is a longitudinal cross-sectional view of the junction water stop structure of the conventional extrusion molding cement board. It is a top view which shows the principal part of the attachment structure of the conventional joint material. It is a longitudinal cross-sectional view of the principal part shown in FIG.

Explanation of symbols

  31 ... Extruded cement board, 35 ... Draining plate, 35a ... Horizontal piece, 35b ... Standing piece, 37, 79 ... Drain pipe, 39 ... Upper surface, 41 ... Water return piece, 43 ... Lower end surface, 71 ... Closure packing member, 73 ... sandwich packing, 75 ... blocking block, 77 ... water return plate, CM ... intersection, DL, DR ... lower extrusion cement plate, HM ... side joint, UR ... right extrusion cement plate, UL, UR ... Extruded cement board on the upper side, UL ... Extruded cement board on the left side, VM ... Vertical joint

Claims (2)

It is a joint water stop structure of an extruded cement board that is applied to the intersection of a vertical joint and a horizontal joint of a horizontally-extruded extruded cement board,
Sealing packing members are provided on each of the lower right end surface of the left extruded cement plate and the lower left end surface of the right extruded cement plate across the vertical joint,
The closing packing member is
A sandwich packing sandwiched between an upper extrusion cement board and a lower extrusion cement board; a closure block that is connected to a side surface of the sandwich packing and blocks a cross section of a horizontal joint; and the closure block It consists of a water return plate extending upward from the rear end surface and protruding,
At the intersection, the closing blocks of the pair of closing packing members are in close contact with each other, and a lower end of a drain pipe having an upper end opened on an upper surface of the closing blocks is formed between the extruded cement plates. A water stop structure for a cemented cement board joint, characterized by being open to the outside through a vertical joint. The closing packing member, joint waterproofing structure of extruded cement board according to claim 1, characterized in that disposed in the intersecting portion located on the boundary of each layer.

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