Joint gasket

Abstract

To provide a joint gasket that can have a main body and a cored bar fixed without using an adhesive, and is easy to handle.SOLUTION: There is provided a joint gasket (10) which is arranged at a joint (M), and the joint gasket comprises a column part (20) extending in the direction of insertion of the joint gasket (10) toward the joint (M), wherein the column part (20) has a rip (30) extending toward an outer wall panel (100) and a cored bar (40) in a flat plate shape, and the cored bar (40) is formed of a spring steel material and has a through hole (41) formed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a joint gasket. [Background technology]

[0002] Conventionally, joint gaskets have been used to prevent rainwater and the like from entering the interior of a building through the joint between two adjacent exterior wall panels and to maintain the appearance of the building in good condition. The joint gasket is made of a waterproof and elastic material such as rubber or resin. The joint gasket is inserted into the joint from the outdoor side and placed in the joint.

[0003] If the joint gasket is made only of elastic materials, it may deform due to temperature changes, such as expansion and contraction, and the waterproofing and appearance may be reduced. For example, Patent Document 1 discloses a construction joint material in which a plate-shaped reinforcing material made of spring steel is embedded in the body of the joint material. Patent Document 2 discloses a gasket in which a three-dimensional core metal is provided in the core. Patent Document 3 discloses a fixed joint material that has a core with a U-shaped cross section that is harder than the body, has a width of about half the joint width, is made of steel, and has multiple through holes formed therein. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-299615 [Patent Document 2] JP 2016-132953 A [Patent Document 3] JP 2000-104356 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the architectural joint material described in Patent Document 1 requires an adhesive to fix the joint material body to the plate-shaped reinforcing material. In addition, the gasket described in Patent Document 2 and the fixed joint material described in Patent Document 3 have a three-dimensional core metal that is difficult to bend, making them difficult to store, transport, and handle.

[0006] One aspect of the present invention aims to provide a joint gasket that can fix a column portion and a core bar without using adhesive and is easy to handle. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, a joint gasket according to one embodiment of the present invention is a joint gasket to be placed in a joint between two adjacent exterior wall panels, and is provided with a column portion extending in a direction in which the joint gasket is inserted into the joint, the column portion having a lip extending toward the exterior wall panel and a flat core bar, the core bar being formed from spring steel material and having a through hole formed therein. Effect of the Invention

[0008] According to one aspect of the present invention, a joint gasket can be realized that can fix a body and a core bar without using an adhesive and is easy to handle. [Brief description of the drawings]

[0009] [Figure 1] 1 is a cross-sectional view showing a state in which a joint gasket according to one embodiment of the present invention is placed in a joint. [Diagram 2] 2 is a cross-sectional view showing a state before the joint gasket shown in FIG. 1 is placed in a joint. [Diagram 3] 2 is a perspective view showing a state in which a core metal is exposed by not illustrating a part of a column portion and a lip in the joint gasket shown in FIG. 1. FIG. [Figure 4] 2 is a perspective view showing a core metal provided in the joint gasket shown in FIG. 1. [Diagram 5]2 is a perspective view showing the core metal and only a portion of the column portion surrounding the core metal in the joint gasket shown in FIG. 1. FIG. [Figure 6] 6 is a cross-sectional view taken along the line AA and the line BB shown in FIG. 5. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (Overview of joint gaskets) An embodiment of the present invention will be described in detail below. A joint gasket 10 according to an embodiment of the present invention is placed in a joint M between two adjacent exterior wall panels 100. Fig. 1 is a cross-sectional view showing the joint gasket 10 placed in the joint M, and Fig. 2 is a cross-sectional view showing the joint gasket 10 in an undeflected state before being placed in the joint M.

[0011] The joint gasket 10 is a member that seals a joint M formed in a building (not shown) such as a house that has an exterior wall panel 100. The joint gasket 10 is placed in the joint M to prevent rainwater and the like from entering the interior of the building through the joint M and to maintain a good appearance of the building. In Fig. 1, the upper side as viewed from the page indicates the outside of the joint M, that is, the outdoor side, and the lower side indicates the inside of the joint M, that is, the indoor side.

[0012] As shown in Fig. 1, two exterior wall panels 100 forming a joint M in which a joint gasket 10 is disposed are plate-like members that constitute the exterior wall surface of a building. The joint M is formed as a gap between these exterior wall panels 100. Note that other building materials may be located on the indoor side of the exterior wall panel 100, and the joint M may be a gap between the two exterior wall panels 100 and may also be formed as a gap between the two other building materials.

[0013] The joint gasket 10 is formed extending in the Z direction shown in Fig. 1, which is the direction in which the joint M extends. The cross section of the joint gasket 10 shown in Fig. 1 and Fig. 2 is a cross section cut in a direction perpendicular to the Z direction and parallel to the Y direction, which is the width direction of the joint M.

[0014] In this specification, the term "parallel" does not necessarily mean that the angle is strictly 90° or 180° with respect to a reference direction or reference plane. Even if there is some angular error due to variations in product dimensions or errors that occur during assembly, it is sufficient as long as it is within a range that can be considered to be substantially "parallel."

[0015] (Column) The joint gasket 10 has a column portion 20 extending in the direction in which the joint gasket 10 is inserted into the joint M. The direction in which the joint gasket 10 is inserted into the joint M is the depth direction of the joint M from the outside to the inside of the joint M, which is a direction parallel to the Y direction in the example of Fig. 1.

[0016] The joint gasket 10 only needs to be inserted from the outside to the inside of the joint M, and the insertion direction does not need to be parallel to the Y direction shown in Fig. 1. The column portion 20 only needs to extend in the direction in which the joint gasket 10 is inserted into the joint M, and the extension direction of the column portion 20 does not need to be parallel to the Y direction.

[0017] However, it is preferable that the column portion 20 is arranged so as to be parallel to the Y direction when the joint gasket 10 is arranged in the joint M. In this state, the joint gasket 10 has a stable posture in the joint M, and the waterproofing and appearance are also good.

[0018] (lip) The column section 20 has a lip 30 and a core bar 40. The lip 30 is composed of an outdoor lip 31, an intermediate lip 32, and an indoor lip 33. In this specification, when simply referring to the lip 30, this is intended to collectively refer to the outdoor lip 31, the intermediate lip 32, and the indoor lip 33.

[0019] The outdoor lip 31 is a lip that extends from the outdoor end of the column section 20 toward the exterior wall panel 100 when placed in the joint M. The outdoor lip 31 is composed of a pair of lips that respectively extend from the column section 20 toward each of the two exterior wall panels 100. The outdoor lip 31 abuts against the inner wall surface that forms the joint M in the exterior wall panel 100. Note that in Figs. 1 and 2, the component number is shown only for one lip in the pair of lips, and the component number for the other lip is not shown.

[0020] If the column portion 20 has such an outdoor lip 31, the joint M can be covered without any gaps by the joint gasket 10. This reduces the risk of rainwater or the like infiltrating into the interior through the joint M, and improves the appearance of the joint M.

[0021] The indoor lip 33 is a lip that extends from the indoor end of the column section 20 toward the exterior wall panel 100 when placed in the joint M. The intermediate lip 32 is a lip that extends from the middle part of the column section 20 toward the exterior wall panel 100 when placed in the joint M. The middle part of the column section 20 refers to the part between the extension base point of the outdoor lip 31 and the extension base point of the indoor lip 33 in the Y direction.

[0022] Similarly to the outdoor lip 31, the intermediate lip 32 and the indoor lip 33 are each formed of a pair of lips each extending from the column section 20 toward each of the two exterior wall panels 100. It is preferable that the intermediate lip 32 and the indoor lip 33 abut against the inner wall surface that forms the joint M in the exterior wall panel 100, but at least one of them does not have to abut against the inner wall surface.

[0023] For example, even if the intermediate lip 32 is not in contact with the exterior wall panel 100, the intermediate lip 32 prevents rainwater, etc. that has infiltrated into the joint M from moving beyond the intermediate lip 32 toward the indoor side, and also functions as a drainage path for the rainwater, etc. In this way, if the column section 20 has the intermediate lip 32 and the indoor lip 33 in addition to the outdoor lip 31, it is possible to effectively reduce the infiltration of rainwater, etc. from the joint M to the indoor side.

[0024] The lip 30 of the column 20 does not have to be composed of multiple lips as described above, but may be composed of at least one lip. The column 20 may further include a lip other than the outdoor lip 31, the intermediate lip 32, and the indoor lip 33.

[0025] Materials for forming the pillar portion 20 and the lip 30 include synthetic rubber or rubber-like elastic bodies such as TPE (thermoplastic elastomer). Examples of synthetic rubber include EPDM (ethylene-propylene-diene copolymer rubber), and examples of TPE include TPO (olefin-based thermoplastic elastomer) or TPS (styrene-based thermoplastic elastomer), but are not limited to these. The rubber-like elastic body may be a foamed material or a non-foamed material.

[0026] From the viewpoint of manufacturability, it is preferable that the column portion 20 and the lip 30 are made of the same material, but they may be made of different materials. Also, the column portion 20 may be made of a non-foaming material, and at least a part of the lip 30 may be made of a foaming material. When a part of the lip 30 is made of a foaming material, it is preferable that the part includes a part that abuts against the exterior wall panel 100.

[0027] (Core wire) The core metal 40 is a reinforcing member of the joint gasket 10. The core metal 40 has a flat plate shape. The core metal 40 is located inside the column portion 20, and the short side direction of the flat plate shape extends along the insertion direction of the joint gasket 10 into the joint M. In addition, the long side direction of the flat plate-shaped core metal 40 extends along the extension direction of the joint gasket 10.

[0028] If the core metal 40 has such a shape, it can be easily embedded inside the column portion 20 as a reinforcing member, and can suitably reinforce the column portion 20. Note that, as long as the core metal 40 has a flat plate shape that can be embedded inside the column portion 20, the embedding direction is not particularly limited.

[0029] Moreover, the core metal 40 in this embodiment has a length in the short direction of the flat plate shape, and the length in the direction in which the joint gasket 10 is inserted into the joint M is equal to or more than half the length in that direction of the column portion 20. If the core metal 40 has such a size, the core metal 40 can ensure sufficient rigidity of the joint gasket 10.

[0030] Furthermore, without being limited thereto, the length of the core metal 40 in the short direction of the flat plate shape may be equal to or less than half the length in the direction in which the joint gasket 10 is inserted into the joint M of the column portion 20. In this case, the core metal 40 is preferably located in a portion of the column portion 20 including a portion between the outdoor lip 31 and the intermediate lip 32 in the direction in which the joint gasket 10 is inserted into the joint M.

[0031] With this configuration, when the joint gasket 10 is placed in the joint M, the posture of the portion of the column section 20 from the base of the outdoor lip 31 to the base of the intermediate lip 32 tends to be stable. Therefore, the outdoor lip 31 can stably abut against the exterior wall panel 100, making it easy to ensure waterproofing and appearance. In addition, when the intermediate lip 32 abuts against the exterior wall panel 100, the intermediate lip 32 also stably abuts against the exterior wall panel 100, making it possible to better ensure waterproofing.

[0032] The core bar 40 is formed of spring steel. The spring steel is a steel having excellent resilience and rigidity, and specifically, may be spring steel as specified in JIS G4801, or heat-treated steel, alloy steel, or free-cutting steel as specified in ISO 683-14.

[0033] JIS G4801 was established in 1950 and was revised in 1953, 1959, 1965, 1967, 1977, 1984, 2005, 2011, and 2021. ISO 683-14 was established in 1973 and was revised in 1992 and 2004. The spring steel material forming the core bar 40 may be a steel material specified in any of these established standards or revised standards.

[0034] If the core metal 40 is made of such spring steel material, the core metal 40 is easily bent due to the restoring force of the spring steel material during storage, transportation, installation, or other handling of the joint gasket 10, and is easily restored to its original state after bending, making it less likely to deform. Therefore, the joint gasket 10 is easy to handle.

[0035] In addition, the metal core 40 has a flat plate shape. Therefore, the joint gasket 10 is easily bent along the surface of the metal core 40 having a flat plate shape. This allows the joint gasket 10 to be stored, for example, rolled up, without cutting the joint gasket 10. In addition, the joint gasket 10 is not bulky when transported, and is easily restored to its unbent state when installed.

[0036] Furthermore, when placing the joint gasket 10 in the joint M, the joint gasket 10 may be hammered to insert it into the joint M. Even in this case, the spring steel material has high rigidity, so that the risk of the core metal 40 being deformed can be reduced.

[0037] In this way, the risk of the joint gasket 10 being deformed during storage, transportation, installation, or other handling can be reduced, thereby reducing the risk of the core wire 40 being installed in a deformed state, which would impair the waterproofing or appearance of the joint gasket 10.

[0038] (Through hole) As shown in Figures 3 to 6, the core metal 40 has a through hole 41 formed therein. Figure 3 is a perspective view showing a state in which the core metal 40 is exposed by not illustrating a part of the column portion 20 and the lip 30 in the joint gasket 10. This is illustrated for the purpose of explaining the core metal 40, and the joint gasket 10 is usually used in a state in which the core metal 40 is not exposed.

[0039] Fig. 4 is a perspective view showing the core metal 40. Fig. 5 is a perspective view showing the core metal 40 and a part of the column portion 20 that surrounds the core metal 40. Fig. 6 is a cross-sectional view of the part of the joint gasket 10 shown in Fig. 5, taken along the arrows AA and BB shown in Fig. 5.

[0040] The through hole 41 is formed penetrating from one surface to the other surface of the flat core metal 40. In this embodiment, the surfaces of the core metal 40 are positioned opposite to the inner wall surfaces of the joint M formed by the two exterior wall panels 100. Therefore, the through hole 41 is formed penetrating the core metal 40 in the X direction, which is the width direction of the joint M.

[0041] If such a through hole 41 is formed in the core metal 40, the material forming the column portion 20 will enter the through hole 41 during the manufacture of the joint gasket 10, as shown in Figures 5 and 6. As a result, in the completed joint gasket 10, the column portion 20 and the core metal 40 are fixed together by a part of the column portion 20 entering the through hole 41, so that a fixing member such as an adhesive is not required to fix the column portion 20 and the core metal 40 together.

[0042] In this way, the configuration in which the through hole 41 is formed in the core metal 40 makes it possible to manufacture the joint gasket 10 without using adhesive, and also makes it possible to reuse fragments (punched pieces) of the spring steel material generated by punching the through hole 41. This effect also contributes to the achievement of, for example, Goal 12 "Ensure sustainable consumption and production patterns" of the Sustainable Development Goals (SDGs) advocated by the United Nations.

[0043] As described above, the core metal 40 is made of spring steel. Spring steel has the characteristics of having a greater restoring force and greater rigidity than other steel materials. It is more difficult to form the through hole 41 by punching in spring steel having such characteristics than in other steel materials. For this reason, in the field of joint gaskets, there has traditionally been no attempt to form a through hole in spring steel, due in part to the need to balance production costs and effectiveness.

[0044] On the other hand, as described in Patent Document 3, it was possible to form a through hole in a general steel material other than spring steel. However, in this case, the rigidity and restoring force of the core metal were insufficient, and the core metal was easily deformed. In Patent Document 3, the risk of deformation is reduced by making the core metal three-dimensional, but such a configuration makes the core metal less flexible, resulting in another problem of poor handling.

[0045] The inventors discovered that it is possible to form a through hole 41 in a core bar 40 made of spring steel material without excessively increasing the manufacturing cost of the joint gasket 10, and thus completed the present invention.

[0046] The manufacturing method of core bar 40 is not particularly limited, and for example, it may be manufactured by forming spring steel material into a flat plate shape and then punching out through hole 41, or it may be manufactured by forming spring steel material using a mold or the like having a shape in which through hole 41 is formed.

[0047] There is also no particular limitation on the manufacturing method of the joint gasket 10. The joint gasket 10 may be manufactured by extrusion molding the column portion 20 and the lip 30 together with the molded core metal 40, or may be manufactured by molding the materials of the column portion 20 and the lip 30 and the molded core metal 40 in a mold.

[0048] The opening shape of the through hole 41 is formed as an elongated hole shape. The opening shape of the through hole 41 is the shape formed by the peripheral portion surrounding the through hole 41 in the core metal 40 when the flat plate-shaped core metal 40 is viewed from above. The elongated hole shape is not particularly limited as long as it is a shape in which the length in the longitudinal direction and the length in the lateral direction are different, such as an elliptical shape or a rectangular shape.

[0049] In this embodiment, the opening shape of the through hole 41 is a rectangle with rounded corners. In this manner, when the opening shape of the through hole 41 is a polygonal shape such as a rectangle, at least one of the corners may be curved.

[0050] In this way, if the opening shape of the through hole 41 is an elongated hole shape, it is easier to increase the opening area of ​​the through hole 41 than, for example, a circular shape. Therefore, the material forming the column portion 20 can easily enter the through hole 41, and the fixation between the column portion 20 and the core metal 40 can be strengthened.

[0051] The through hole 41 formed in the core bar 40 may be single or multiple. When the through hole 41 is multiple in the core bar 40, the restoring force and rigidity of the core bar 40 can be easily adjusted by adjusting the number of through holes 41 formed. Therefore, the restoring force and rigidity of the core bar 40 can be easily adjusted without changing the material from which the core bar 40 is formed.

[0052] Furthermore, when the core metal 40 has a plurality of through holes 41, the distance between adjacent through holes 41 is preferably 10 mm or more and 25 mm or less. If the distance between the through holes 41 is less than 10 mm, the restoring property and rigidity of the core metal 40 are reduced, and there is a risk that the joint gasket 10 will be deformed during handling.

[0053] On the other hand, if the distance between the through holes 41 exceeds 25 mm, the fixed portion between the column portion 20 and the core metal 40 is reduced. Therefore, if the column portion 20 is formed from the above-mentioned rubber-like elastic body, there is a risk that the core metal 40 will be easily exposed from the end of the joint gasket 10 due to shrinkage of the column portion 20 after heating during manufacturing.

[0054] If the distance between the through holes 41 is within the above range, the column portion 20 and the core metal 40 are well fixed, and it is easy to adjust the restoring force and rigidity of the core metal 40 to an appropriate range from the viewpoint of the handleability of the joint gasket 10. When three or more through holes 41 are formed, the distance between the respective through holes 41 may be the same or different.

[0055] From the viewpoint of forming the through hole 41, it is preferable that the thickness of the core bar 40 is thin. On the other hand, from the viewpoint of ensuring the restoring force and rigidity of the core bar 40, it is not preferable that the thickness of the core bar 40 is too thin. Therefore, the thickness of the core bar 40 is preferably 0.1 mm or more and 1.0 mm or less, more preferably 0.2 mm or more and 0.7 mm or less, and even more preferably 0.3 mm or more and 0.5 mm or less. If the core bar 40 has such a thickness, the through hole 41 can be formed in the core bar 40 without increasing the manufacturing cost, and the restoring force and rigidity of the core bar 40 can be ensured.

[0056] 〔summary〕 The joint gasket of aspect 1 of the present invention is a joint gasket to be placed in a joint between two adjacent exterior wall panels, and has a column portion extending in the direction in which the joint gasket is inserted into the joint, the column portion having a lip extending toward the exterior wall panel and a flat core bar, the core bar being formed from spring steel material and having a through hole formed therein.

[0057] According to the above-mentioned configuration, since the flat core metal is located inside the column portion, the gasket can bend along the flat surface of the core metal while ensuring the strength of the gasket. Therefore, the gasket can be easily stored and handled. In addition, since the core metal is made of spring steel, it is difficult to deform due to the restoring force, which is a characteristic of spring steel, and it is easy to restore the gasket to its original state when installed.

[0058] In addition, the core metal has a through hole. Therefore, when the joint gasket is molded, the material of the column part enters the through hole, and the column part and the core metal are fixed together. This allows the column part and the core metal to be fixed together without using adhesive. In addition, by adjusting the size and number of the through holes, it is easy to adjust the restoring force and rigidity of the core metal.

[0059] A joint gasket according to a second aspect of the present invention is the joint gasket of the first aspect, wherein the opening shape of the through hole is formed in an elongated hole shape.

[0060] According to the above-mentioned configuration, compared to the case where the opening shape of the through hole is formed as, for example, a perfect circle, the chipping of the blade of the punching machine can be reduced, and the through hole can be easily formed. Also, if the opening shape of the through hole is an elongated hole, the opening area of ​​the through hole can be made larger than, for example, a perfect circle. Therefore, the material of the column part can easily enter the through hole, and the fixation between the column part and the core bar can be strengthened.

[0061] A joint gasket according to aspect 3 of the present invention is the same as that of aspect 1 or 2, in which the core metal has a plurality of through holes formed along the extension direction of the joint gasket, and the distance between adjacent through holes may be 10 mm or more and 25 mm or less.

[0062] If the distance between the through holes is less than 10 mm, the opening area of ​​the through holes will be excessive, reducing the restoring force and rigidity of the core metal, making it more likely to deform. Also, if the distance between the through holes is more than 25 mm, the number of fixing points between the column part and the core metal will be reduced, which may cause the core metal to be easily exposed from the cut surface of the joint gasket.

[0063] According to the above-mentioned configuration, the core bar and the column portion are fixed well, and the restoring force and rigidity of the core bar can be adjusted within an appropriate range from the viewpoint of the handleability of the joint gasket.

[0064] [Additional Notes] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0065] 10 Joint gasket 20 Column section 30 Lip 40 Core wire 41 Through hole 100 Exterior wall panels M joint

Claims

1. A joint gasket disposed in a joint between two adjacent exterior wall panels, A column portion extending in a direction in which the joint gasket is inserted into the joint, The column portion is a lip extending toward the exterior wall panel; A flat core metal, The core metal is It is made of spring steel material, A joint gasket having a through hole formed therein.

2. The joint gasket according to claim 1 , wherein an opening shape of the through hole is formed as an elongated hole.

3. The joint gasket according to claim 1 or 2, wherein a plurality of through holes are formed in the core metal along the extension direction of the joint gasket, and the distance between adjacent through holes is 10 mm or more and 25 mm or less.

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