JP6208020B2 - Waterproof structure of joint - Google Patents

Description

  The present invention includes a primary seal portion that is loaded on the outdoor side of a joint formed between outer wall panels of a building outer wall, and a secondary seal portion that is integrally formed with the primary seal portion and disposed on the indoor side of the joint. Further, the present invention relates to a waterproof structure for joints using a sealing material that double seals joints at primary and secondary seal portions.

  FIG. 1 shows a waterproof structure of a joint between outer wall panels of a building outer wall disclosed in Patent Document 1 below, and the outer wall panels 1a and 1b are each substantially inclined to open to the joint on the indoor side of the side edge. A J-shaped metal frame 2 is provided, and is attached to the shaft assembly 4 by a mounting bracket 3 that holds the metal frame 2.

  A primary sealant 6 made of a gasket is loaded on the outdoor side of the joint 5 formed between the outer wall panels 1a and 1b, and the mounting bracket 3 is provided on the indoor wide portion 5a of the joint formed by the metal frame 2. The secondary sealing material 8 is disposed in such a manner that the side ends of the curved portions 7 on both sides are elastically contacted with the outdoor side walls of the metal frame 2 on both sides of the joint, and the primary sealing material 6 and the secondary sealing material 8 Thus, the joint 5 is double sealed and waterproof.

  FIG. 2 shows a waterproof structure of a joint between outer wall panels of a building outer wall disclosed in Patent Document 2 below. The outer wall panels 11a and 11b are provided with a groove-shaped pier 12 on the indoor side of the side edge, and between the outer wall panels. A joint material 14 is attached to the joint 13 formed in the above. This joint material 14 is composed of a column portion 15, a surface lip 16, an intermediate lip 17 and a leg lip 18 projecting on both sides of the column portion 15, and the surface lip 16 and the intermediate lip 17 are on the outer wall panel side on both sides of the joint. The leg lip 18 is supported by the indoor side wall 12a of the groove-shaped pier 12 in the groove-shaped pier that forms the wide portion of the indoor joint, and the tip of the leg lip 18 is the tip of the groove-shaped pier 12. It has a structure in which the joint is double sealed and waterproofed by elastic contact with the outdoor side wall 12b.

JP 2011-179216 A JP 2001-262724 A

  In the joint waterproof structure shown in FIG. 1, the secondary sealant 8 is folded in two and inserted into the joint, and is attached to the wide portion 5 a of the joint 5 formed of the metal frame 2, and then the primary sealant 6 is joined to the joint. However, it is not easy to fold the secondary sealing material 8 and insert it into the joint and place it in the metal frame. In addition, the mounting bracket 3 for fixing the outer wall panels 1a and 1b is partially mounted in the longitudinal direction of the joint, and the secondary sealing material 8 is not supported by the mounting bracket 3 in a place where the mounting bracket 3 is not provided. There is a possibility that 8 will not contact the outdoor side wall 2b of the metal frame 2 and the seal will be insufficient. In addition, two insertion operations of the primary sealing material 6 and the secondary sealing material 8 are required, which is troublesome and takes a lot of time for construction.

  In the waterproof structure of the joint shown in FIG. 2, the joint material 14 is inserted by being pushed into the joint as in the case of the primary sealing material 6 made of the gasket shown in FIG. Well, in addition to shortening the construction time, each lip 16, 17, 18 is elastically contacted with the joint in the longitudinal direction of the joint, and there is no shortage of the seal, but there is still room for improvement in this waterproof structure. There is.

  The present invention relates to a waterproof structure for a joint that waterproofs joints using a sealing material that includes a primary seal part and a secondary seal part that is integrally formed with the primary seal part. It is an object of the present invention to provide a waterproof structure for a joint that is easier to work and can be more reliably sealed.

  The waterproof structure of the joint according to the first aspect of the present invention has a stepped shape in which the joint between the outer wall panels of the building outer wall is composed of a wide part on the indoor side and a narrow part on the outdoor side, and the interior side is wide, and is pushed into the joint. A gasket-like primary seal comprising a column and a lip that protrudes laterally from a plurality of portions of the column and elastically contacts an end surface of the outer wall panel that forms the narrow portion of the joint. Of the primary seal portion of the primary seal portion, and a leg portion protruding from the middle portion of the indoor lip located closest to the indoor side toward the indoor side. A seal lip formed obliquely projecting toward the inner lip tip, elastically contacting the outdoor side surface of the joint wide portion, and projecting obliquely from the leg tip toward the extension of the column portion in a direction opposite to the seal lip Secondary seam made up of formed guide lips The guide lip that is formed of a portion and protrudes obliquely inward from both legs of the secondary seal portion has a space between the tips narrower than the joint width D, and is a guide when inserted into the joint narrow portion. It is characterized by fulfilling the function as

The invention according to claim 2 is the waterproof structure of the joint according to claim 1, wherein the leg portion is parallel to the column portion, and the tip side is curved or inclined in a direction away from the extension of the column portion. ,
According to a third aspect of the invention, in the joint waterproof structure according to the first or second aspect of the invention, the indoor side lip of the primary seal portion on which the leg portion protrudes is easily bent together with the leg portion. In order to achieve this, a notch or a thin part is formed.

  The sealing material that double waterproofs the joint of the invention according to claim 1 has only one insertion into the joint because the primary seal part and the secondary seal part are integrated, and the construction time can be shortened. When pressed, each lip of the primary seal part hits the outer wall panel side end surface and bends toward the outdoor side, and as the indoor side lip bends to the outdoor side, the secondary seal part of the secondary seal part that protrudes from the lip is formed. Similarly, the leg portion also bends toward the outdoor side, whereby the seal lip can be pressed against the outdoor side surface of the joint wide portion, and the sealing by the secondary seal portion can be reliably performed, In order to make the tip of the leg lip 18 elastically contact the outdoor side wall of the grooved pier 12 as shown in Patent Document 2, the bottom wall which is the indoor side wall of the grooved pier that supports the leg lip 18 becomes unnecessary. , Shika In the present invention, since it is not necessary to support the legs from the indoor side, the storage space for the leg lip 18 in the joint wide part can be widened, the insertion into the joint wide part is facilitated, and it extends obliquely downward. The guide lip has an interval between the tips smaller than the joint width D, so that the guide lip can be easily inserted into the narrow joint portion. After insertion, the guide lip performs a guide function and can be easily inserted into the joint. In the corner where the lip is in elastic contact with the outer wall panel side end surface and the seal lip of the secondary seal part is in elastic contact with the outdoor side surface of the joint wide part, it is surrounded by the indoor lip and the seal lip. Forming a closed drainage space, and even if water may penetrate the lip of the primary seal part, it will be discharged to the outside through the closed drainage space, Achieve the effect. In the present invention, the joint width D means the distance between the outer wall panels on the most outdoor side, and indicates the width of the insertion port when the sealing material is inserted and inserted into the joint from the outdoor side as in the present invention.

  In the sealing material of the invention according to claim 2, the seal lip is formed so that the front end side of the leg portion is warped outwardly, so that the seal lip can be formed on the outdoor side of the joint wide portion without increasing the protruding length. It comes to be pressed against the side.

  According to the sealing material of the invention according to claim 3, when the joint is inserted by the notch or the thin-walled portion formed in the indoor lip of the primary seal portion, the indoor lip of the primary seal portion is easily bent together with the legs of the secondary seal portion. Thus, the sealing by the seal lip of the secondary seal portion can be performed more reliably.

Sectional drawing which shows the prior art example of the waterproof structure of a joint. Sectional drawing which shows the other conventional example of the waterproof structure of a joint. Sectional drawing which shows the waterproof structure of the joint which concerns on this invention. Sectional drawing of the sealing material used with the waterproof structure shown in FIG. Sectional drawing of the principal part of the leg part of another aspect. Furthermore, sectional drawing of the principal part of the leg part of another aspect.

  Hereinafter, a waterproof structure according to an embodiment of the present invention will be described with reference to the drawings. In the figure, the same reference numerals are given to the same structural portions as the waterproof structure shown in FIG.

In the waterproof structure shown in FIG. 3, the adjacent outer wall panels 1 a and 1 b are attached to the shaft assembly 4 by a mounting bracket 3 that holds the indoor side wall 2 a of the metal frame 2 from the inside of the metal frame, and between the outer wall panels,
A joint 5 is formed which includes an outdoor-side narrow portion 5 b formed on the panel-side end surface and an indoor-side wide portion 5 a formed of the metal frame 2. Also, the corners on the outdoor side of the end face on the panel side are chamfered and are inclined, whereby the joint 5 is gradually reduced from the joint width D toward the narrow side 5b on the indoor side. The mounting structure and joint 5 of the outer wall panels 1a and 1b described above are as described above in the background art.

  FIG. 4 shows a cross-sectional structure of the sealing material 21 inserted into the joint 5, and a column part 23 inserted with a cored bar 22 formed by folding a steel plate, and a side parallel to both sides of the column part 23. A column lip 24 at the upper end of the column part, a middle lip 25 at the middle part of the column part, and an indoor lip 26 positioned at the most indoor side at the lower end of the column part, and the overall cross-sectional shape forms an O-shape. A primary seal portion 27 made of a gasket and a substantially intermediate portion of the protruding length of the indoor side lip 26 protruding from the column portion 23 extend in parallel with the extension of the column portion 23, and the tip side is an extension of the column portion 23. A leg 29 that curves outward in a direction away from the top, a seal lip 30 that projects obliquely upward from the tip of the leg 29 toward the tip of the indoor lip 26, and the seal from the tip of the leg Pillar portion 23 opposite to lip 30 It consists of a secondary seal portion 32 made up of a guide lip 31 formed so as to project obliquely downward toward the extension, and the distance m between the guide lip tips of the seal portion 32 is the width D of the joint 5 between the outer wall panels 1a, 1b. Narrower.

  It is desirable that the distance between the leg portions 29 is narrower than the width D of the joint so that the leg 29 can be smoothly inserted into the joint narrow width portion 5a. The illustrated guide lip 31 is formed continuously and smoothly on substantially the extension of the seal lip 30. However, the guide lip 31 is stepped with the seal lip 30, and the seal lip 30 is drawn from the guide lip 31. Also good.

FIG. 5 shows an example in which the seal lip 30 is formed so as to be drawn to the outdoor side from the guide lip 31 to form a step with the guide lip 31.
FIG. 6 shows an example in which the seal lip 30 is formed so as to protrude slightly to the indoor side from the extension of the guide lip 31. The seal lip 30 has the side surface on the indoor side smoothly and continuously from the guide lip 31 without any step. Is formed.

  As described above, the leg portion 29 of the secondary seal portion 32 in the seal material 21 of the embodiment is formed to be curved outward, but may be formed straight on a straight line, The entirety may be formed to be curved or inclined inward or outward. However, as will be described later, since the distal end of the seal lip 30 presses against the outdoor side surface of the metal frame 2 after insertion, the leg portion 29 is formed with the distal end side curved outward as shown in FIGS. Is desirable.

  The sealing material 21 is also formed with a notch 33 in the vicinity of the base of the leg portion 29 on the pillar side of the indoor lip 26 among the lips 24, 25, 26 of the primary seal portion 27. Both the lips 26 on the front end side can be bent more easily than the portions where the notches 33 are formed. In the example shown in FIG. 4, the notch 33 is formed on the upper surface of the lip 26, but it may be formed on the lower surface or on the upper and lower surfaces. In place of the notch 33, a thin portion may be used.

  The illustrated lips 24, 25, and 26 are parallel and horizontally oriented, but at least one lip may be inclined or curved upward, and a plurality of intermediate lips 25 may be omitted. Also good.

  The cored bar 22 is not limited to the illustrated shape, and the cross section may be, for example, a circle or an ellipse, or may be omitted. For example, it may be made of hard resin other than metal.

  As the material of the sealing material 21 of this embodiment, for example, a thermosetting material such as EPDM rubber, natural rubber, and chloroprene rubber, or an olefin-based (TPO) styrene-based (TPS) of a thermoplastic elastomer (TPE), excluding the core metal 22. A rubber-like elastic body such as) is used.

  When the sealing material 21 shown in FIG. 4 is inserted into the joint 5 between the outer wall panels 1a and 1b, the tip of the guide lip 31 of the secondary seal portion 32 is applied to the joint 5 and the surface lip 24 of the primary seal portion 27 is hand-held. Then, the seal material 21 is inserted into the joint 5 directly or by using a tool. At the time of insertion, first, the seal lip 30 of the secondary seal portion 32 is tilted inward on the leg portion side by the outer wall panel side end surface forming the joint narrow width portion 5b, and then each lip 24, 25, 26 of the primary seal portion 27 is inserted. Bends upward. Of these, as the indoor lip 26 bends, the leg 29 also tries to spring up together with the guide lip 31 and the seal lip 30, but since it is held by the outer wall panel side end face, it remains pressed against the side end face. When the seal lip tip is removed from the metal frame side end, it is opened outward by the elastic force of the leg 29 and the seal lip 30, and when the seal material 21 is inserted to a fixed position, the seal lip 30 is As shown in FIG. 3, it is elastically contacted with the outdoor side wall 2b of the metal frame 2 provided with the outdoor side surface of the joint wide portion 5b to be sealed.

In the sealing material 21 shown in FIG. 4, the guide lip 31 is formed smoothly and continuously on substantially the extension of the sealing lip, so that there is little resistance when inserted into the joint 5 and the insertion can be performed smoothly. Further, as shown in FIG. 6, even if the seal lip 30 is formed so as to protrude slightly to the indoor side from the extension of the guide lip 31, the indoor side surfaces of both the lips 30 and 31 are continuously formed smoothly. Thus, the insertion into the joint 5 can be smoothly performed without being caught.
As shown in FIG. 5, in the case where the seal lip 30 is formed in a step with the guide lip 31 and pulled to the outdoor side, the resistance when the seal lip 30 is inserted into the joint 5 is reduced. Becomes smoother.
Further, as shown in FIG. 3, since the corners of the outer side end face of the outer wall panel are inclined, the joint 5 is reduced from the joint width D toward the narrow side 5b on the indoor side. The above-described sealing material 21 can be smoothly inserted into the joint 5. However, in the present invention, it is not always necessary to make the angle of the end face on the outdoor side of the outer wall panel inclined.

  The mounting state of the sealing material 21 shown in FIG. 3 located on the extension of the seal lip 30 is a waterproof structure of the joint 5 between the outer wall panels. In this waterproof structure, each lip 24, 25, 26 of the primary seal portion 27 is The seal lip 30 of the secondary seal portion 32 is sealed by being pressed against the end face on the outer wall panel side, and is elastically contacted with the outdoor side wall 2b of the metal frame 2 so that the primary seal portion 27 and the secondary seal portion 32 The joint 5 has a structure that double waterproofs, and the corner forming the step on the outer wall side end face forms a closed drainage space 34 surrounded by the indoor lip 26 and the seal lip 30, and the water is the lip 24, Even if it may go through 25, 26, it will drain through the drainage water space 34 to the outdoors.

  The outer wall panels 1 a and 1 b of the above embodiment are provided with the metal frame 2 on the indoor side of the side edge and are attached to the shaft assembly 4 by the attachment fitting 3, but are attached to the shaft assembly 4 using the attachment fitting 3. Instead, it may be attached to the pillar 19 as shown in FIG. In this case, the metal frame 2 described above can be omitted, and when it is omitted, the seal lip 30 comes into direct contact with the outdoor side surface of the joint wide portion formed on the outer wall panels 1a and 1b.

1a, 1b · · Outer wall panel 2 · Metal frame 3 · Mounting bracket 4 · Shaft assembly 5 · Joint 21 · Sealing material 22 · Core 23 · · Column 24 · · Surface lip 25 · · Intermediate Lip 26 ·· Indoor lip 27 · · Primary seal portion 29 · · Leg 30 · · Seal lip 31 · · Guide lip 32 · · Secondary seal portion 33 · · Notch 34 · · Drainage space

Claims (3)

  The joint 5 between the outer wall panels 1a and 1b of the building outer wall is composed of a wide portion 5a on the indoor side and a narrow portion 5b on the outdoor side to form a stepped shape on the indoor side, and is pushed into the joint 5 to be loaded. 21 is a gasket comprising a pillar portion 23 and lips 24, 25, and 26 that are formed to project laterally from a plurality of portions of the pillar portion 23 and elastically contact the end face of the outer wall panel that forms the narrow width portion 5 b of the joint 5. Primary seal portion 27 and leg portion 29 that protrudes toward the indoor side from the middle portion of indoor lip 26 located on the most indoor side among the lips 24, 25, 26 of primary seal portion 27. A seal lip 30 projecting obliquely from the front end of the leg toward the indoor lip end of the primary seal portion 27 and elastically contacting the outdoor side surface of the joint wide portion 5a, and the seal lip from the front end of the leg 30 and the column in the opposite direction The guide lip 31 is formed of a secondary seal portion 32 formed of a guide lip 31 formed to project obliquely toward the extension of the guide lip 31, and is formed to project obliquely inward from both legs 29 of the secondary seal portion 32. The joint waterproof structure characterized in that the distance m between the tips is narrower than the width D of the joint 5 and functions as a guide when inserted into the narrow portion 5b of the joint 5.   The waterproof structure according to claim 1, wherein the leg portion is parallel to the column portion and the tip end side is curved or inclined in a direction away from the extension of the column portion.   The indoor side lip 26 of the primary seal portion 27 from which the leg portion 29 is projected is formed with a notch 33 or a thin portion to facilitate bending together with the leg portion 29. Item 3. The waterproof structure according to item 1 or 2.