JP3322825B2 - Outer wall joint waterproof structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for an outer wall joint, and more particularly to a waterproof structure for an outer wall joint which can be applied to a joint formed on an outer wall surface of a prefabricated building employing a prefabricated unit construction method.

[0002]

2. Description of the Related Art Conventionally, in the construction of buildings such as houses, a prefabricated unit construction method for simplifying work at a construction site and shortening a construction period, thereby reducing construction costs has been frequently used. As shown in FIG. 3, in the prefabricated unit construction method, building units 31 to 33 constituting a prefabricated building 30 are divided and produced in advance in a factory, and these building units 31 to 33 are sequentially suspended at a construction site by a crane or the like. It is constructed by installing and arranging it in a predetermined position.

[0003] The building unit 31 has an outer wall panel 34 attached to the side surface of a substantially box-shaped framework. Also,
In the building unit 32, an outer wall panel 34 is attached to a side surface of a frame formed in a substantially box shape, and a roofing material 35 is attached to an inclined surface of a frame 33 formed in a substantially wedge shape on an upper surface. A roof material 36 is attached to the inclined surface of the frame 33 formed in a substantially wedge shape. Therefore, the outer wall of this prefabricated building 30 is
By setting the 32 at a predetermined position, it is formed by the respective outer wall panels 34 arranged on the same elevation.

By the way, in the prefabricated unit construction method, after each of the building units 31 to 33 is installed at a predetermined position,
The joint 37 formed between the outer wall panel 34 and the roofing material 35 is subjected to waterproof treatment. For example, the waterproof structure 40 of the joint 37 shown in FIG.
A draining member 42 fixed to the upper part of the skeleton of the prefabricated building 30 via a wooden frame material 41 on the upper part of the skeleton of the prefabricated building 30 (upper part in the figure). It has a waterproof member 43 interposed between the outer wall panel 34 and a cover 44 for covering the joint 37 in the field work.

The draining member 42 has a substantially mountain-shaped cross section,
And it is fixed along the joint 37 so as to cover the roofing material 35 of the building unit 32. On the other hand, the waterproof member 43 has a waterproof sheet 43B attached to a steel plate 43A having a substantially mountain-shaped cross section, and the adhesive layer 43 is formed such that the cross-sectional tip of the steel plate 43A is inclined downward.
It is fixed to the building unit 31B and the outer wall panel 34 by C and 43D. In the waterproof member 43, the waterproof sheet 43B is connected to the draining member 42 via the adhesive layer 43E by the on-site work.

Further, the cover 44 is made of a steel plate having a substantially U-shaped cross section, and after the work of connecting the draining member 42 and the waterproof member 43 is completed, the cover 44 is fixed with a tapping screw 46 or the like with a sealing material 45 interposed therebetween so as to cover the joint 37. You. This cover 44 is a draining member
It has a function as a decorative material for hiding 42 and waterproof member 43 to finish joint 37, and its longitudinal end is connected to another cover through a joint (not shown). According to such a waterproof structure 40, the joint 37 is primarily waterproofed by the cover 44, and even if rainwater or the like enters the inside of the cover 44, the steel plate 43
A, the waterproof sheet 43B, and the draining member 42 are sequentially dropped.

[0007]

By the way, the waterproof structure 40 described above is used to connect the waterproof sheet 43B to the draining member 42 via the adhesive layer 43E at the construction site.
The waterproof sheet 43B may be wrinkled. in this case,
There is a problem that desired waterproofness cannot be obtained. In particular, the waterproof structure 40 is provided with a draining member due to a change with time of the adhesive layer 43E.
There is a possibility that the waterproof sheet 43B may be peeled off from 42, and the desired waterproofness may not be maintained for a long time.

In the waterproof structure 40, the outer wall panel 34 and the drain member 42 need to be relatively far apart in order to secure a working space for connecting the waterproof sheet 43B to the drain member 42. Therefore, in this waterproof structure 40, the cover 44 as a decorative material to be bridged between the outer wall panel 34 and the draining member 42 is indispensable, thereby increasing the number of components and construction procedures at the construction site, and There is also the problem of increasing the construction cost of 30. The present invention has been made in view of the aforementioned problems,
An object of the present invention is to provide a waterproof structure for an outer wall joint that can reliably and reliably waterproof joints formed on an outer wall of a building constructed by, for example, a prefabricated unit construction method for a long period of time and reduce building construction costs. is there.

[0009]

According to a first aspect of the present invention, an object is provided between an outer wall panel disposed outside a building and a drainage member provided below the outer wall panel. In order to waterproof joints, a waterproofing structure of an outer wall joint having a waterproof member in which a mounting portion along a back surface of the outer wall panel and a protruding portion extending in a direction away from the building are connected at a predetermined intersection angle. Wherein the water draining member has an extending portion along the projecting portion, and the projecting portion and the extending portion are collectively clamped by a gasket having a substantially U-shaped cross section, wherein a waterproof structure for an outer wall joint is provided. Can be solved.

Here, the term "outer wall panel" does not mean only an outer wall panel attached to a building unit for building a building by a prefabricated unit construction method.
It also includes the outer wall panels arranged outside the building constructed by the conventional method. Further, as the joint assumed here, a joint formed between the outer wall panel and the roof material, a joint formed between a pair of outer wall panels, a joint formed between the outer wall panel and the veranda, or It also includes joints formed between the outer wall panel and the window frame.

As the mounting member, a steel plate, a resin plate or the like in which the mounting portion and the protruding portion are integrally formed can be adopted. In use, for example, the mounting portion and the protruding portion are formed so that the protruding portion has a horizontal or downward inclined surface. The intersection angle of the sections may be appropriately selected. And such a mounting member,
What is necessary is just to fix to an outer wall panel or a building by suitable fixing means, such as an adhesive layer and a tapping screw.

On the other hand, as the draining member, for example, a steel plate, a resin plate, or the like having a substantially mountain-shaped cross section which covers a frame material attached to a frame of a building and is disposed on an upper layer of a roof material can be adopted. What is necessary is just to connect an extension part.
That is, the extension may be formed in advance integrally along the edge of the draining member, or may be connected to the draining member in a substantially T-shaped cross-section, and may be formed with respect to the protrusion of the waterproofing member. The form and the like are arbitrary as long as they can be oriented in parallel.

As a gasket, for example, EPDM having good water resistance, weather resistance, heat resistance and chemical resistance is used.
(Ethylene-propylene copolymer) or the like. In such a gasket, a part of the outer surface may be pressed against a waterproof member or a draining member, and a part of the inner surface may be pressed against a protruding portion or an extended portion. Furthermore, this gasket is used to improve water resistance, weather resistance, heat resistance, chemical resistance, etc.
A predetermined film may be formed on the outer surface.

[0014] In the waterproof structure of the outer wall joint constructed as described above, the substantial joint formed between the outer wall panel and the draining member is located between the projecting portion of the waterproof member and the extending portion of the draining member. The waterproof treatment is completed by inserting and arranging the gasket in the joint so as to sandwich the projecting portion and the extending portion of the gasket. In other words, in the waterproof structure of the outer wall joints configured as described above, in performing the waterproofing treatment of the joints, since the work of bonding the waterproof sheet to the draining member as in the related art is not performed, the desired waterproofness can be reliably obtained. Thus, this waterproof property can be maintained for a long time.

Further, in the waterproof structure of the outer wall joint constructed as described above, since the waterproof treatment is completed by inserting and arranging the gasket into the joint, the distance between the outer wall panel and the draining member is reduced to a necessary minimum in advance. This can be set so that the necessity of the conventional cosmetic material can be eliminated.

In the present invention, a lip portion may be provided on an outer surface of the gasket, and the lip portion may be in pressure contact with the drainage member. Here, as the lip, if the gasket is elastically deformed when placed at a predetermined position and can be pressed against the drainage member,
The shape, size, number, and the like can be appropriately selected.

In the waterproof structure of the outer wall joint constructed as described above, since the lip provided on the outer surface of the gasket is in pressure contact with the drainage member, water droplets adhering to the outer surface of the gasket are drained through the lip. Thus, it is possible to avoid the possibility that water droplets will flow into the inner surface of the member.

Further, according to the present invention, a lip is provided on an inner surface of the gasket, and the lip is pressed against at least one of the projecting portion and the extending portion. Here, as long as the gasket is elastically deformed when placed at a predetermined position and can be pressed against one of the protruding portion and the extended portion, the shape, size, number, etc. of the lip can be appropriately selected. In the waterproof structure of the outer wall joint formed as described above, the lip is provided on the inner surface of the gasket. Therefore, if the lip is provided so as to individually press against the protruding portion and the extension portion, the gasket can be provided. Even if rainwater or the like is flooded on the inner surface side, it is possible to prevent flooding between the projecting portion and the extending portion, which are substantial joints.

Further, according to the present invention, as described in claim 4, an elastic member is accommodated in the gasket, and the elastic member is one of an open end of the projection and an open end of the extension. It may be in pressure contact with at least one. Here, as the elastic member, for example, a butyl-based sealant or the like can be adopted, and it may be disposed at the innermost part of the gasket.
In the waterproof structure of the outer wall joint thus configured,
If the elastic member housed in the gasket is in pressure contact with the protruding portion and the extending portion, even if rainwater or the like is flooded on the inner surface side of the gasket, flooding between the protruding portion and the extending portion, which is a substantial joint, is prevented. Can be prevented.

In the present invention, a film may be provided on an outer surface of the gasket, and the film may have a hue corresponding to the outer wall panel. Here, as the film, for example, CPE (chlorinated polyethylene), CSM (chlorosulfonated polyethylene)
And the like may be adopted, and may be appropriately selected in consideration of water resistance, weather resistance, heat resistance, chemical resistance, and the like.

In the waterproof structure of the outer wall joint constructed as described above, the durability of the gasket is improved and the hue corresponding to the outer wall panel can be obtained by appropriately selecting the material of the film. The appearance is also improved. Further, in the present invention, as described in claim 6, if the gasket is pressed against the mounting portion, it is possible to prevent water from infiltrating into the inner surface side of the gasket, thereby obtaining more reliable waterproofness. Will be.

[0022]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of a main part showing a main part in FIG. FIG. 1 shows a prefabricated building 10. This prefabricated building 10 includes building units 11 to
13 are constructed at the construction site by a prefabricated unit construction method, and the outer wall panel 14 is attached in advance to the side of the building unit 12 constituting the upper floor, and the inclination of the building unit 13 constituting the lower floor is A roofing material 15 is previously attached to the upper surface via a roofing sheet 15A. The inclined upper end of the roofing material 15 is covered with a draining member 16 fixed to the building unit 12 constituting the upper floor. The draining member 16 has a substantially mountain-shaped cross section, and is fixed to the building unit 12 at the construction site so as to sandwich the roofing sheet 15A and the wooden frame member 17 therebetween.

In such a prefabricated building 10, joints 18 formed between the outer wall panel 14 and the draining member 16 include:
An outer wall joint waterproof structure 20 configured according to the present invention is applied. The waterproof structure 20 includes a waterproof member 21 and a draining member.
16 has an extended portion 22 and a gasket 23.

The waterproof member 21 has a mounting portion 21A extending along the back surface of the outer wall panel 14 and a projecting portion 21B extending in a direction away from the prefabricated building 10 (leftward in the figure) at a substantially right angle.
The mounting portion 21A and the protruding portion 21B are integrally formed in a substantially L-shaped cross section by bending a metal plate having rust prevention properties, and are long members whose cross-sectional shapes are continuous in the depth direction in the drawing. The mounting portion 21A is provided with an adhesive portion 21C and a sealing member 21D on one surface (left side in the drawing), and a waterproof sheet 24 on the other surface (right side in the drawing).

The adhesive portion 21C is an unvulcanized butyl tape having an appropriate width, and is adhered along the longitudinal direction of the waterproof member 21. The seal member 21D is an EPDM (ethylene / propylene copolymer) continuous foam sponge having appropriate width and thickness dimensions, and is disposed adjacent to the adhesive portion 21C. On the other hand, for example, CR (chloroprene rubber) or EPDM (ethylene
It is formed in a planar shape by a propylene copolymer), and covers the roofing sheet 15A when the waterproof member 21 is disposed at a predetermined position.

The mounting portion 21A is connected to the outer wall panel 14 via the water-stopping member 14A and the water-stop sheet 14B such that the protrusion 21B is parallel to the lower end surface of the outer wall panel and is separated by a predetermined distance. It is attached to the back. Exterior wall panels
Numeral 14 is provided in the building unit 12 in a state where the water blocking member 14A and the sealing member 21D are compressed and deformed by elasticity. Therefore, when the building unit 12 is arranged at a predetermined position at the construction site, the protrusion 21B is oriented substantially horizontally, and the tip of the waterproof sheet 24 reaches the roofing sheet 15A. .

Next, the draining member 16 has a step 16A formed by bending the upper end into a substantially crank shape in cross section. The bending dimension of the step portion 16A is appropriately set in consideration of the thickness of the frame member 17 so as to come into surface contact with the framework (not shown) of the building unit 12 via the roofing sheet 15A and the waterproof sheet 24. This draining member 16
Are fixed by fixing screws 25 penetrating the step 16A. The waterproof sheet 24 has a waterproof tape 24A attached at a position corresponding to the fixing screw 25 in advance.
This ensures that rainwater and the like flowing along the space are sealed. The extending portion 22 is connected to the step portion 16A, and faces away from the building unit 12 when the draining member 16 is arranged at a predetermined position, in other words, the projecting portion 21A of the waterproof member 21. Orientated so as to be parallel to.

As shown in FIG. 2, the extending portion 22 and the protruding portion 21A are arranged so that their leading ends correspond to each other, and are collectively clamped by a gasket 23 having a substantially U-shaped cross section. . The gasket 23 has a lip 23A on its outer surface.
Are provided and a plurality of lips 23B are provided which are inclined toward the inner deep portion, and the projections 23
C is formed. The gasket 23 contains an elastic member 26 such as a butyl-based sealant in advance.

When such a gasket 23 is disposed at a predetermined position, the distal end of the lip 23A is bent and deformed to press against the draining member 16, and the distal end of each lip 23B is And the projection 21A, and
The projection 23C comes into pressure contact with the mounting portion 21A of the waterproof member 21. Further, when the gasket 23 is arranged at a predetermined position, the elastic member 26 comes into pressure contact with the distal end of the extending portion 22 and the protruding portion 21A so as to surround it.

Such a gasket 23 is made of, for example, EPDM having good water resistance, weather resistance, heat resistance, and chemical resistance.
(Ethylene / propylene copolymer)
23A, a lip 23B and a projection 23C are integrally formed, and a coating 23D is provided on the outer surface including the lip portion 23A. The film 23D is made of, for example, CPE (chlorinated polyethylene), CSM having excellent water resistance, weather resistance, heat resistance, chemical resistance, etc., similarly to EPDM (ethylene / propylene copolymer).
(Chlorosulfonated polyethylene) or the like, and a pigment that can obtain a hue corresponding to the outer wall panel 14 is appropriately mixed.

Next, after the building units 11 to 13 are arranged at predetermined positions, the procedure of the waterproofing treatment applied to the joint 18 will be described with reference to FIG.
It will be described based on. First, the inclined upper end of the roofing sheet 15A is raised along the side surface of the building unit 12, and the waterproof sheet 24 is placed on the roofing sheet 15A. At this time, the roofing sheet 15A and the waterproof sheet 24
They are interconnected by a waterproof tape 24A attached to the waterproof sheet 24, and maintain a laminated state without being held by a worker by hand.

Next, the frame member 17 is fixed to the building unit 12 so that the end of the waterproof sheet 24 is pressed down.
And the draining member 16 is fixed to the building unit 12 by the fixing screw 25 so that the step 16A is in surface contact with the frame of the building unit 12. Then, by inserting the gasket 23 into the joint 18, the extending portions 22 arranged in parallel with each other are provided.
And the projection 21A is collectively clamped (see the arrow in the figure). In such a waterproofing process, the gasket 23 is formed such that the distal end of the lip 23A, the distal end of each lip 23B, and the projection 23C are formed by the draining member 16, the extending portion 22, the projecting portion 21A, and the mounting portion 21A.
, And the elastic member 26 is
The process is completed by inserting the joint A into the joint 18 until it is pressed against the tip of the joint A.

According to the waterproofing structure 20 for building joints as described above, the substantial joint 18 between the outer wall panel 14 and the draining member 16 is provided.
Is between the projecting portion 21B of the waterproof member 21 and the extending portion 22 of the draining member 16, and the gasket 23 is inserted into the joint 18 to project the projecting portion 21B.
And if the extension part 22 is clamped collectively, the waterproofing process is completed. Therefore, according to the waterproof structure 20 of the outer wall joint described above,
In the waterproofing treatment of the joints 18, since the work of bonding the waterproof sheet to the draining member 16 as in the related art is not performed, reliable waterproofness can be maintained for a long time. Furthermore, waterproof structure of outer wall joint
In the case of 20, the waterproofing process is completed simply by inserting the gasket 23 into the joint 18 and arranging the gasket 23 in a predetermined position, so that the on-site work can be simplified as compared with the conventional case and the joint size is required. Since it can be set to the minimum,
This eliminates the need for a conventional decorative material.

Since the lip 23A provided on the outer surface of the gasket 23 is pressed against the draining member 16, water droplets attached to the outer surface of the gasket 23 flow to the draining member 16 via the lip 23A. As a result, water droplets do not flood into the joints 18. Further, the gasket 23 has a plurality of lips 23B provided on the inner surface thereof, each having a protrusion 21A,
Since the gasket 23 is in pressure contact with the extending portion 22, even if rainwater or the like is flooded on the inner surface side of the gasket 23, the projecting portion 21 which is a substantial joint 18 is provided.
Water between A and the extension portion 22 can be prevented.

In the gasket 23, since the elastic member 26 housed inside presses against the protruding portion 21A and the extending portion 22, even if rainwater or the like is flooded on the inner surface side of the gasket 23. Water can be prevented from entering between the projecting portion 21A and the extending portion 22, which are the substantial joints 18. Besides, gasket 23
Since the coating 23D provided on the outer surface has a hue corresponding to the outer wall panel 14, the prefabricated building 10 can obtain a good appearance and the gasket can be appropriately selected by selecting the material of the coating 23D. 23 can improve durability. Further, since the gasket 23 has the projection 23C which is pressed against the mounting portion 21A, it is possible to prevent water from infiltrating into the inner surface of the gasket 23, thereby obtaining more reliable waterproofness.

According to the waterproof structure 20 of the outer wall joint, the waterproof member 14 is provided between the outer wall panel 14 and the mounting portion 21A.
A, since the water stop sheet 14B, the adhesive portion 21C, and the seal member 21D are interposed, there is no danger of water being immersed between the outer wall panel 14 and the mounting portion 21A due to bad weather, outer wall cleaning, or the like.
Further, since the waterproof sheet 24 is provided with the waterproof tape 24A at a position corresponding to the fixing screw 25, rainwater or the like flowing along the fixing screw 25 is reliably sealed, thereby improving the waterproofness.

It should be noted that the present invention is not limited to the above-described embodiment, and appropriate modifications and improvements can be made. For example, in the above-described embodiment, the protrusion of the waterproof member and the extension of the draining member are provided horizontally with each other, but the extension may be along the protrusion, and the protrusion and the extension may be provided. May be inclined downward. Further, the protruding portion and the extending portion need not be connected to the ends of the waterproofing member and the draining member, respectively, and may be connected to the waterproofing member and the draining member in a substantially T-shaped cross section.

The gasket of the present invention is not limited to the gasket exemplified in the above-mentioned embodiment, and any form, size, material, hue, etc. may be selected as long as the present invention can be achieved. In addition, in the above-described embodiment, the prefabricated building constructed by the prefabricated unit construction method is exemplified, but the present invention is formed by arranging plate-shaped outer wall panels outside the building constructed by the conventional construction method. It can also be applied to joints that have been set.

[0039]

As described above, according to the waterproofing structure of the outer wall joint according to the first aspect of the present invention, the projecting portion of the draining member and the extending portion of the waterproofing member which are parallel to each other have a substantially U-shaped cross section.
Because it is sandwiched by a gasket in a lump, it is possible to maintain a reliable waterproof property for a long period of time as compared with the case where the waterproof sheet is adhered to the draining member as before, and a cosmetic material that covers the entire joint Can be eliminated. Further, according to the waterproof structure of the outer wall joint according to claim 2,
Since the lip portion provided on the outer surface of the gasket is in pressure contact with the draining member, the waterproofness can be improved by flowing water droplets attached to the outer surface of the gasket to the draining member.

Further, according to the waterproof structure of the outer wall joint according to the third aspect, since the lip provided on the inner surface of the gasket is in pressure contact with at least one of the projecting portion and the extending portion, the gasket has a substantial effect. It is possible to prevent water from entering between the projecting portion and the extending portion, which are joints. According to the waterproof structure of the outer wall joint according to the fourth aspect, the elastic member housed in the gasket is in pressure contact with at least one of the projecting portion and the extending portion. Water between the section and the extension section can be prevented.

According to the waterproof structure of the outer wall joint according to the fifth aspect, since the film provided on the outer surface of the gasket has a hue corresponding to the outer wall panel, the material of the film is appropriately selected. With the addition, the durability of the gasket is improved, and the appearance of the joint is also improved. Further, according to the waterproof structure of the outer wall joint according to the sixth aspect, since the gasket is pressed against the mounting portion, it is possible to prevent water from infiltrating into the inner surface side of the gasket, thereby obtaining more reliable waterproofness.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment according to the present invention.

FIG. 2 is an enlarged sectional view of a main part showing a main part in FIG.

FIG. 3 is a schematic perspective view showing a prefabricated building.

FIG. 4 is a sectional view showing a conventional waterproof structure.

[Explanation of symbols]

 10 Prefabricated building (building) 14 Exterior wall panel 16 Drainage member 18 Joint 20 Waterproof structure of exterior wall joint 21 Waterproof member 21A Mounting part 21B Projection part 22 Extension part 23 Gasket 23A Lip part 23B Lip 23D film 26 Elastic member

────────────────────────────────────────────────── ─── Continued from the front page Examiner Masaaki Ieda (56) References JP-A-7-279392 (JP, A) JP-A-6-306696 (JP, A) (58) Fields investigated (Int. Cl. ⁷⁾ , DB name) E04B 1/684

Claims (6)

(57) [Claims] An exterior wall panel disposed outside the building;
In order to waterproof joints formed between the outer wall panel and a drainage member provided below the outer wall panel, a mounting portion extending along a back surface of the outer wall panel and a projecting portion extending in a direction away from the building have a predetermined intersection. An outer wall joint waterproof structure having a waterproof member connected at an angle, wherein the draining member has an extending portion along the projecting portion, and the projecting portion and the projecting portion are formed by a gasket having a substantially U-shaped cross section. The waterproof structure of the outer wall joint, characterized in that the parts are collectively clamped. 2. The waterproof structure for an outer wall joint according to claim 1, wherein a lip portion is provided on an outer surface of the gasket, and the lip portion is pressed against the draining member. 3. The outer joint according to claim 1, wherein a lip is provided on an inner surface of the gasket, and the lip is pressed against at least one of the protrusion and the extension. Waterproof structure. 4. An elastic member is accommodated in the gasket,
The waterproof structure for an outer wall joint according to claim 1, wherein the elastic member is in pressure contact with at least one of an open end of the protruding portion and an open end of the extension. 5. The waterproof structure for an outer wall joint according to claim 1, wherein a coating is provided on an outer surface of the gasket, and the coating has a hue corresponding to the outer wall panel. 6. The waterproof structure for an outer wall joint according to claim 1, wherein the gasket is pressed against the mounting portion.