JP2007224615A - Eaves gutter joint and joint structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an eaves gutter joint capable of enhancing a long term water cutting-off effect at a joint connection part when the application of an adhesive agent is not uniform in a construction where the adhesive agent is used and even in a construction where the adhesive agent is not used by securing the water cut-off performance for a long period of time by preventing water leakage from the joint connection part of an eaves gutter, and a joint structure using the eaves gutter joint. <P>SOLUTION: This eaves gutter joint is at least one of an inner joint 4 and an outer joint 2 forming a joint connection part at the ends of eaves gutter bodies 1A, 1B facing each other. A placement part for a water absorbing polymer 6 is formed on the joining surface side thereof on the eaves gutter bodies 1A, 1B. A placement part for an adhesive agent 3 or a packing member is formed on both sides of the placement part for the water absorbing polymer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an eaves joint that is mounted at the joint between the end portions of the eaves main body and a joint structure using the same.

  Conventionally, generally, for example, as illustrated in FIG. 4, in the joint that connects the end portions of the eaves main bodies 1 </ b> A and 1 </ b> B in the longitudinal direction, (A) The joint 2 is provided along with the adhesive 3, and the inner joint 4 having the adhesive 3 applied to the outer surface thereof is pushed in and provided on the inner peripheral surface of (B, C) as an inner presser. Here, the adhesive 3 plays a role for enhancing the joining strength at the joint and preventing water leakage such as rainwater from the joint.

  However, in the construction of the eaves joint structure as described above, a situation may occur in which the amount of the adhesive 3 applied is less than the prescribed amount in the field work. If there is such a variation in construction, water will flow through the defective or insufficient part of the adhesive 3 and will cause water leakage.

  Therefore, conventionally, instead of using the adhesive 3, for the purpose of preventing water leakage, for example, as shown in FIGS. 5 and 6, between the eaves main bodies 1 </ b> A and 1 </ b> B and the outer joint 2. Alternatively, the packing material 5 and the water-absorbing polymer 6 are also considered to be sandwiched between the inner joint 4 and the inner joint 4. For example, specifically, a packing material (Patent Document 1), a packing material (Patent Document 2), and the like have been proposed, and a water-absorbing polymer sheet material is sandwiched (Patent Documents 3-5). ) And a structure in which a water-absorbing polymer is sandwiched between one eave ridge and an adhesive is used for the other eave ridge (Patent Document 6).

However, even in these proposals, when the packing material is sandwiched, a gap may be generated due to the aging of the packing material and water leakage may occur, and in the case of a water-absorbing polymer, repeated drying and wetting are often performed. In addition, there is a problem that water leakage tends to occur due to a decrease in the ability of the water-absorbing polymer.
JP 2000-282640 A JP-A-7-292891 Japanese Utility Model Publication No. 6-1554 JP-A-3-147964 JP 2004-84302 A Japanese Patent Laid-Open No. 4-60051

  The present invention, from the background as described above, solves the conventional problems, ensures water leakage prevention at the joint joints of eaves for a long time, more specifically construction using an adhesive New eaves joints that can improve the long-term water-stopping effect at seam joints even when the application of adhesive is not uniform and varies, or even when no adhesive is used, and joints using this The challenge is to provide a structure.

  The eaves joint of the present invention is characterized by the following.

  It is a joint of at least one of an inner joint and an outer joint that form a seam joint portion at the opposite eaves main body end, and a water-absorbing polymer arrangement portion is provided on the joint surface side to the eaves main body. In addition to being provided, an adhesive or a packing member is provided at both side positions.

  Moreover, the eaves joint structure of this invention is characterized by the following. That is, in the eaves joint structure formed with the above eaves joint, the arrangement portion of the water-absorbing polymer is brought into contact with at least one of the inner peripheral surface and the outer peripheral surface of the opposite end portions of the eaves main body. In addition, an adhesive or a packing member is disposed on both sides of the water-absorbing polymer disposition portion.

  According to the structure of the eaves joint using the joint of the present invention as described above, taking advantage of the excellent water-stopping action of the water-absorbing polymer at the joint, and adhesive or packing members on both sides of the water-absorbing polymer. By arranging it to form a weir that suppresses evaporation of moisture to the water-absorbing polymer, it suppresses deterioration over time and decrease in absorption capacity due to the drying and wetting cycle of the water-absorbing polymer, thereby preventing long-term water stopping The effect can be secured.

  In addition, even when there is a variation in the application of the adhesive, the water-stopping property is prevented by the action of the water-absorbing polymer disposed at the inner peripheral surface of the opposing eaves main body end or the central portion of the joint that contacts the outer peripheral surface. Will be secured. The same applies to a case where a gap due to aging of the packing member occurs. In other words, according to the present invention, when the application of the adhesive is not uniform and varies in the construction using the conventional adhesive, or in the construction not using the adhesive, the water-stopping effect for a long time at the joint portion Can be improved.

  The present invention has the features as described above, and an embodiment thereof will be described below.

  FIG. 1 of the accompanying drawings is a perspective view illustrating an embodiment of the present invention. For example, as shown in FIG. 1, in the inner joint 4 as an eaves joint of the present invention, the eaves body 1A, 1A, A disposing portion for the water-absorbing polymer 6 is provided on the joint surface side, which is the outer peripheral surface, facing the inner peripheral surface of 1B, and the adhesive 3 is disposed on both sides of the water-absorbing polymer 6 disposing portion. Is provided.

  When performing joint joint construction using such an inner joint, as illustrated in the schematic diagram in FIG. 2, the arrangement portion of the water-absorbing polymer 6 is provided on both ends of the opposing eaves main bodies 1A and 1B. It is in contact with the inner peripheral surface. As a result, the water-stopping action of the water-absorbing polymer 6 is realized. And the junction part by the adhesive agent 3 is formed in the both-sides position of the arrangement | positioning part of the water absorbing polymer 6. FIG. At the joint joint, the water-absorbing polymer 6 is in a positional relationship such that the adhesive 3 sandwiches it.

  In the example of FIG. 1 and FIG. 2, a disposing portion for the water-absorbing polymer 6 and a disposing portion for the adhesive 3 are provided on the outer peripheral surface of the inner joint 4, which are the same as those of the outer joint 2 shown in FIG. 1. It may be provided on the inner peripheral surface, and may be provided on both the outer peripheral surface of the inner joint 4 and the inner peripheral surface of the outer joint 2. In the case of only one, the other joint can be provided with only an adhesive, a packing member, or a water-absorbing polymer as in the conventional art. These selections can be determined in consideration of the environment in which the eaves are installed, climatic conditions, rainfall, and the like.

  Instead of the adhesive 3, the packing member 5 may be used as shown in FIG.

  In any case, according to the joint structure of the eaves as described above, an excellent water-stopping action by the water-absorbing polymer at the joint is utilized, and an adhesive or a packing member is provided on both sides of the water-absorbing polymer. By arranging it to form a weir that suppresses evaporation of moisture to the water-absorbing polymer, it suppresses deterioration over time and decrease in absorption capacity due to the drying and wetting cycle of the water-absorbing polymer, thereby preventing long-term water stopping The effect can be secured.

  In addition, even when there is a variation in the application of the adhesive, the water-stopping property is prevented by the action of the water-absorbing polymer disposed at the inner peripheral surface of the opposing eaves main body end or the central portion of the joint that contacts the outer peripheral surface. Will be secured. The same applies to a case where a gap due to aging of the packing member occurs. In other words, according to the present invention, when the application of the adhesive is not uniform and varies in the construction using the conventional adhesive, or in the construction not using the adhesive, the water-stopping effect for a long time at the joint portion Can be improved.

  In the joint structure of the present invention as described above, it is important that the water-absorbing polymer 6 is in contact with the inner peripheral surfaces of both ends of the eaves main bodies 1A and 1B. The abutment main body where the water-absorbing polymer 6 is not abutted due to the loss or deterioration of the adhesive or the packing member is not sufficient for preventing water leakage from the joint when abutting only on one side. Water leakage from the end of the water is inevitable as in the conventional case, and it is difficult to maintain the water stop effect over a long period of time.

  As the water-absorbing polymer 6 used for the eaves joint of the present invention and the joining structure thereof, a polymer obtained by adding a highly water-absorbing polymer to a solid having elasticity in a natural state is used. Examples of the superabsorbent polymer include starch-based superabsorbent polymers such as starch-acrylonitrile graft polymer hydrolyzate and starch-acrylic acid graft polymer, cellulose-acrylonitrile graft polymer, cellulose-styrene sulfonate graft copolymer. Cellulose superabsorbent polymer such as polymer, polysaccharide superabsorbent polymer, protein superabsorbent polymer such as collagen, polyvinyl alcohol superabsorbent polymer such as polyvinyl alcohol cross-linked polymer, sodium polyacrylate crosslink Polymers, acrylic superabsorbent polymer such as sodium acrylate-vinyl alcohol copolymer, maleic anhydride superabsorbent polymer, vinylpyrrolidone superabsorbent polymer, polyethylene glycol diacrylate cross-linked polymer, etc. It can be mentioned ether-based superabsorbent polymers and the like, but the present invention is of course not limited thereto.

  Here, a highly water-absorbing polymer generally has a water absorbing power of 500 to 1000 times its own weight, is not dissolved in water, and does not release water that has been absorbed even when pressurized, so it has been conventionally used for paper diapers. However, the present invention pays attention to the fact that the water-absorbing polymer expands by absorbing water, and that this expansion is extremely effective for water-stopping, and is good when used as a sealing material for eaves joint joints. This is based on the knowledge that a water stop effect can be obtained. Some water-absorbing polymers have a volume that doubles in 5 days upon water absorption. However, if the volume does not increase immediately at the time of water absorption, rain leakage will occur, so the volume will double in a short time. It is desirable to use a high water absorption polymer having a high water absorption rate.

  Further, the adhesive 3 and the packing member 5 may be various types including those conventionally known.

  For example, it is an adhesive such as urethane, acrylic or epoxy, and is a packing member such as vinyl chloride resin, urethane rubber or silicon rubber.

  Furthermore, in the above eaves joint according to the present invention, a groove for disposing a water-absorbing polymer or an adhesive as shown in the case of the packing member 5 in FIG. You may provide in a joint and an outer joint. By these, more reliable arrangement | positioning is attained.

  The effect of the excellent water stop action of the present invention as described above is also confirmed by the following examples.

A water stop test was performed for each of the following examples along the form of FIGS. 1 and 2.
(Comparative example 1) Only a water-absorbing polymer is disposed as in the prior art.
(Comparative example 2) Only the packing member is disposed as in the prior art.
(Example 1) Adhesive is arranged on both sides, and a water-absorbing polymer is arranged in the center.
(Example 2) A packing member is disposed on both sides, and a water-absorbing polymer is disposed in the center.

  Here, “Runseal F” manufactured by Toyobo Co., Ltd. was used as the water-absorbing polymer, soft PVC was used as the packing member, and urethane adhesive was used as the adhesive.

  The water stop test and the results are shown in Table 1. As a display of the results, A: no water leak, B: water leak occurred.

比較例１の場合には、乾燥／湿潤の１００サイクルで吸水量が初期の１／２に低下するために水漏れが発生している。また、比較例２の場合には、７０℃／５０００Ｈ（時間）で軟質ＰＶＣの可塑剤が揮発し、硬く、ひびが入るために水漏れが発生している。

In the case of Comparative Example 1, water leakage occurs because the water absorption amount is reduced to half of the initial value after 100 cycles of drying / wetting. Further, in the case of Comparative Example 2, the soft PVC plasticizer volatilizes at 70 ° C./5000 H (hours), is hard, and cracks and water leakage occurs.

  On the other hand, in the embodiment of the present invention, no water leak occurred.

It is the perspective view which illustrated one Embodiment of this invention using a water absorbing polymer and an adhesive agent. It is a schematic sectional drawing of the form of FIG. It is a schematic sectional drawing of another embodiment using a water absorptive polymer and a packing member. It is a perspective view of the construction process which showed the prior art example using the adhesive agent. It is a schematic sectional drawing of the prior art example which used the packing member. It is a general | schematic sectional drawing of the prior art example using a water absorbing polymer.

Explanation of symbols

1A, 1B Eaves main body 2 Outer joint 3 Adhesive 4 Inner joint 5 Packing member 6 Water-absorbing polymer

Claims (2)

  It is a joint of at least one of an inner joint and an outer joint that form a seam joint portion at the opposite eaves main body end, and a water-absorbing polymer arrangement portion is provided on the joint surface side to the eaves main body. An eaves joint which is provided and provided with an arrangement portion for an adhesive or a packing member at positions on both sides thereof.   2. An eaves joint structure formed with the eaves joint of claim 1, wherein the arrangement portion of the water-absorbing polymer is brought into contact with at least one of the inner peripheral surface and the outer peripheral surface of the opposite end portions of the eaves main body. And an eaves joint structure in which an adhesive or a packing member is disposed on both sides of the water-absorbing polymer disposition portion.

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